Ice ignition device

FIELD: engines and pumps.

SUBSTANCE: proposed invention relates to automotive ICE ignition devices. Proposed ignition device comprises ignition plug insulance recorders, anti-carbon devices, those to record the state of aforesaid anti-carbon devices and those to reveal conduction carbon deposits on ignition plug. With insulance falling below preset magnitude, engine is switched over to conditions allowing increasing ignition plug temperature. At aforesaid temperature, plug insulator cleaning of carbon deposit is intensified, the intensification process being recorded. With anti-carbonisation process readings exceeding preset ones and insulance below designed magnitude, increased carbon deposition is revealed and decided upon. In aforesaid case, light alarm signal on necessity of servicing ignition plug is issued.

EFFECT: intensification of carbon deposit removal from ignition plug.

10 cl, 8 dwg

 

The technical field to which the invention relates.

The present invention relates to an ignition device of an internal combustion engine that is included with the car, etc.

The level of technology

As the ignition device of the internal combustion engine (hereinafter referred to as engine) known to the ignition device of this type, in which the spark plug is installed in the cylinder head of the engine, allowing the breaker directly penetrates into the combustion chamber and the high voltage generated in the ignition coil, is fed to the spark plug.

For example, according Fig spark plug used in this ignition device includes an insulator 12, held cylindrical mounting device 11, the Central electrode 13, held in the insulator 12 and with the end of the tip protruding from the end of the insulator 12 and the electrode 14 connected to the mass, located opposite the Central electrode 13, with the prescribed spark gap Ga between them, and its design is such that the spark discharge is generated between the Central electrode 13 and the electrode 14 connected to earth, when applying a high voltage between the Central electrode 13 and the electrode 14, the United on the mass.

Meanwhile, depending on the operating state of the engine on the candle zagig the deposits may form carbon deposits. The formation of soot on the spark plug this phenomenon, in which soot resulting from incomplete combustion, etc. in the engine, is deposited on the insulator of the spark plug, resulting in lower values of insulation resistance of the spark plug. Due to the presence of soot on the spark plug leakage current flows between the electrode connected to the mass, and the Central electrode of the spark plug in the high voltage in the ignition timing, the voltage between the electrodes decreases, and the spark discharge does not occur, which can lead to skipping of the ignition.

To counteract the deposition of soot on the spark plug traditionally exercised by (1) a method of making a spark plug of a special form (for example, a way to enhance purification of carbon by giving the spark plug of this form, in which the spark passes through the upper surface of the insulator), (2) a method for purification of carbon through the generation of creeping discharge on the upper surface of the insulator with the use of an auxiliary electrode, (3) method of purification of carbon by the use of multiple discharge, etc.

In Japanese laid patent No. 2002-161841 serves as another way to prevent the deposition of carbon, the solution of carbon by controlling the motor-generator to increase the electrical load on the engine the internal combustion and increasing the temperature in the combustion chamber during the formation of carbon deposits on the spark plug in an internal combustion engine, to which during operation is connected to the motor-generator.

As a way to check the degree of deposition of carbon on the spark plug is known, for example, a method of registering the degree of deposition of carbon by applying voltage between the electrodes of the spark plug (between the electrode connected to the mass, and the Central electrode), the registration of the current flowing between the electrodes (leakage current), using the device registration current, and evaluation of reduction of the insulation resistance values based on the value registered in the current.

The formation of soot on the spark plug can be counteracted by the above described method of cleaning spark plugs. However, in addition to the soot on the insulator deposited metal fuel additives (for example, iron or manganese), resulting in formation of conductive deposits. Since such conductive deposits are not self-cleaning, it is necessary to issue a warning, etc. to the driver at an early stage in order to avoid malfunction of the engine.

Meanwhile, Nagar, consisting of carbon black, etc. also increases the conductivity. Accordingly, even if the leakage current is recorded by the above described device registration current, it is impossible to determine whether the leakage current is either carbon or conductive deposits or he called as carbon, and about odashima sediments. Thus, it is difficult to take measures for issuing warnings to the driver about the deposition of conductive deposits on the spark plug and the failure of the engine, which may occur due to conductive deposits.

Disclosure of inventions

The present invention is made in consideration of these circumstances, and the present invention is the provision of a device of the ignition internal combustion engine capable of determining the deposition of conductive deposits on the spark plug.

The invention

Considering the fact that carbon deposits on the spark plugs can be cleaned in the self-cleaning mode, for example, by switching the operating state of the internal combustion engine to raise the temperature of the spark plug, the present invention differs, what is the status of the implementation of measures against carbon is counted, and if the counter value exceeds a certain value, i.e. if measures against carbon are sufficient, but the condition in which the value of the insulation resistance of the spark plugs a little, saved, then it is concluded that the insulator of the spark plugs settled conductive deposits that cannot be cleaned in the self-cleaning mode.

The solution

In particular, the present invention differs in that the ignition device of the engine vnutrennih the combustion with the spark plug includes: a registration tool to register the values of the insulation resistance of the spark plug; a tool for the implementation of measures against carbon measures against carbon deposits on the spark plug; a means of reference for starting the implementation status of measures against carbon; means for determining for determining deposition of conductive deposits on the spark plug when the value of counter measures against carbon exceeds the prescribed value, and the value of the insulation resistance of the spark plug is less than the prescribed value.

According to this particular topic, when measures against carbon deposits on the spark plug out and the count value obtained by counting the implementation status of measures against carbon exceeds the prescribed value, you can determine that it has taken sufficient measures against sludge and that the deposition of soot on the spark plug was overcome. In the absence of deposition of conductive deposits on the spark plug in such a situation, since the deposition was overcome, the value of the insulation resistance of the spark plug 1 is large enough to exceed the prescribed value. On the contrary, in the case of deposition of conductive deposits on the spark plug, the value of the insulation resistance of the spark plug is reduced, reaching values that are not offset the subsequent prescribed value. Thus, if the value of counter measures against carbon exceeds the prescribed value and the insulation resistance of the spark plug is less than the prescribed value, it is possible to determine that the conductive sediments were deposited on the spark plug.

In addition, the ignition device of the internal combustion engine further comprises a means of actuation of a light signal when the deposition of conductive deposits on the spark plug. When the deposition of conductive sediments, the driver is notified by a light signal, which allows to take measures to encourage the driver to carry out maintenance spark plugs.

In addition, the ignition device of the internal combustion engine further comprises a means to control the operational status of the internal combustion engine to reduce the temperature of the spark plug when the deposition of conductive deposits on the spark plug. As the measures needed when the deposition, conductive deposits on the spark plug, you can take steps to control the operating state of the internal combustion engine to reduce the temperature of the spark plug. By adopting such measures, the reduction of the insulation resistance values due to conductive deposits weakened, and probably the be the misfire is reduced. Thus, it is possible to counteract the flow of unburned fuel mixture on the catalyst in the exhaust system and to prevent damage to the catalytic Converter.

In addition, the ignition device of the internal combustion engine further comprises: means for registering a current registration for the current flowing between the electrodes of the spark plug when a voltage is applied between the electrodes; means for obtaining values of insulation resistance of the spark plug on the basis of the current value registered by the registration tool current.

Here, according to the present invention, as a method of registering values of insulation resistance of the spark plug, it is possible to apply the method to ensure the registration unit of current, the recording current (leakage current)flowing between the electrodes of the spark plug when a voltage is applied between the electrodes (between the Central electrode and the electrode connected to earth), and the evaluation values of the insulation resistance of the spark plug on the basis of the current value registered by the registration unit current.

In addition, the ignition device of the internal combustion engine, in which the tool measures against carbon includes a means to enhance the purification of carbon by switching the operating state of the internal combustion engine to which avicenia temperature spark plugs. In taking such action against a burn, you can avoid the problems associated with the purification method, for example, purification of carbon by giving the spark plug has a special form, to clean the carbon deposits from the use of an auxiliary electrode, purification of carbon by the use of multiple discharge etc.

In particular, for the implementation of the purification of carbon by giving the spark plug special form is needed to make a spark to spread over the upper surface of the insulator to provide self-cleaning. In this case, the discharge position is automatically located near the upper surface of the insulator, which is offset from the center of the combustion chamber, resulting in lower flammable abilities. Meanwhile, according to the method of using auxiliary electrode increase in value due to the added auxiliary electrode creates an additional problem. In addition, the cleaning by the use of multiple discharge increases energy consumption and reduce maintenance spark plugs. Here, applying the way of activating the cleaning of carbon by switching the operating state of the engine, these problems can be solved.

According to the present invention, since it is possible to determine the deposition of conductive deposits on the spark plug, you can take action to avoid the mother of such measures, as encouraging the driver to carry out maintenance spark plugs by incorporating a light signal.

Brief description of drawings

Figure 1 - diagram of the configuration of a variant of implementation of the present invention.

Figure 2 - chart of the waveform of the ion current (leakage current), which takes place at the circuit output register current.

Figure 3 is a logical block diagram of an illustrative processing counteract the deposition of soot/definitions conductive carbon, implemented by the ECU of the engine.

Figure 4 is a family of isotherms spark plugs, where the engine speed and the load factor are used as parameters.

Figure 5 - map of estimating temperature of a candle.

6 is a graph of the relationship between the temperature of the spark ignition and the time required for the removal of soot.

7 is a map for finding the coefficient α of the effectiveness of the measures against Nagar.

Fig illustrative spark plug.

Preferred embodiments of the inventions

Variant implementation of the present invention will be described below with reference to the drawings.

1 shows a diagram illustrative configuration of the ignition device conforming to the present invention.

The ignition device in this example is a device ignition engine mounted on the vehicle and attached to the automatic transmission, and includes candle 1 ignition coil 2 ignition breaker 3, a battery 4, scheme 5 registration current ECU (electronic control unit) 6 engine, etc.

According Fig candle 1 plug includes an insulator 12, held cylindrical mounting device 11, the Central electrode 13, held in the insulator 12 and with the end of the tip protruding from the end 23 of the insulator and the electrode 14 connected to the mass, located opposite the Central electrode 13 with a prescribed spark gap Ga between them.

Scheme 5 recording the current of this circuit, recording the ion current and the leakage current and includes two Zener diodes 51, 52, a capacitor 53, a resistor 54 registration current, resistor 55, the circuit 56 inverting amplifier, etc.

Coil 2 ignition consists of a primary coil 21 and the secondary coil 22. One end of the primary coil 21 is connected to the battery 4 and the other end connected to the collector of a powerful transistor 31 contained in the circuit breaker 3. One end of the secondary coil 22 is connected to the glow plug 1 plug and its other end connected to earth through two Zener diodes 51, 52.

Two Zener diodes 51, 52 are connected in series in opposite directions. The capacitor 53 is connected in parallel to one Zener diode 51 and resistor 54 recording the current of the connected computers is correctly another Zener diode 52. Potential Vin between the capacitor 53 and resistor 54 registration current is supplied to the inverted input (-) circuit 56 inverting amplifier through a resistor 55, where it is inverted and amplified, and the output voltage V of the circuit 56 inverting amplifier is supplied to the ECU 6 engine in the quality of signal reception power.

In the above device ignition during engine operation, the power transistor 31 is unlocked/locked on the rise/decay signal ignition control coming from the ECU 6 of the engine on the circuit breaker 3. When the power transistor 31 is opened, the primary current flows from the battery 4 to the primary coil 21 of the coil 2 of the ignition. Then, when the power transistor 31 is locked, the primary current in the primary coil 21 stops flowing, and the secondary coil 22 is induced high voltage through electromagnetic induction.

High voltage excites the discharge spark between the center electrode 13 and the electrode 14 connected to the mass of the candle 1 ignition and generates a flash, thanks to the vicinity of the spark gap Ga ions are present combustion. Here, since the spark gap Ga candles 1 ignition switch is made conductive, the discharge current flows from the electrode 14 connected to the mass of the candle 1 ignition to the Central electrode 13, flows through the secondary coil 22 of the coil 2 of the ignition and charges the capacitor 53 with the volumes 5 registration current, and discharge current additionally flows to the mass through Zener diodes 51, 52. After charging the capacitor 53 figure 5 registration current is excited, and the charging voltage of the capacitor 53 is limited to a Zener voltage of Zener diode 51, which serves as a power source, allowing recorded ion current (leakage current).

Ion current (leakage current) flows in the opposite direction to the discharge current. In particular, at the end of the ignition voltage is applied between the Central electrode 13 and the electrode 14 connected to the mass of the candle 1 ignition using a charging voltage of the capacitor 53. Accordingly, the ion current flows between the Central electrode 13 and the electrode 14 connected to earth, in the ion generation combustion during ignition of the air-fuel mixture in the engine cylinder. Here, the ion current flows from the Central electrode 13 to the electrode 14 connected to the mass, and additional flows from the supply via resistor 54 registration current to the capacitor 53. Here, the input potential Vin of the circuit 56 inverting amplifier is changed in accordance with changes in the ionic current that flows through resistor 54 registration current, and voltage V in accordance with the ion current is output as a signal check voltage with the output of the circuit inverting amplifier 56 to the ECU 6 of the engine. Ion current region is trebuetsya on the basis of the output voltage V of the circuit inverting amplifier 56.

In the above circuit configuration, by increasing the degree of deposition of soot on the plug 1 plug, the value of insulation resistance between the Central electrode 13 and the electrode 14 connected to the mass, is reduced, and the leakage current flowing from the Central electrode 13 to the electrode 14 connected to ground. The leakage current also flows along the same path as ion current. The input potential Vin of the circuit 56 inverting amplifier is changed in accordance with the leakage current that flows through resistor 54 registration current, and voltage V in accordance with the leakage current is output as a signal check voltage with the output of the circuit 56 inverting amplifier ECU 6 engine. Note that when generating the ion current of the ion current and the leakage current flowing from overlapping each other.

Now describe the ion current and the leakage current occurring at the output (signal reception power) of scheme 5 registration current, with reference to figure 2. Figure 2(a) is a diagram of a waveform when the soot is not formed on the plug 1 plug, and figure 2(b) is a diagram of a waveform when the carbon Deposit is formed on the plug 1 plug.

On any of the 2(a) and 2 (b), the control signal ignition increases at time t1 and falls at time t2, making between the Central electrode 13 and the electrode 14 connected to the mass of the candle 1 ignition served high voltage. So the m way in the time period from time t2 to time t3 is generated bit spark, burn the air-fuel mixture, and the ion current flowing after a time t3. Ion current increases with increasing pressure in the cylinder of the engine and decreases to zero with decreasing pressure in the cylinder.

Here it is assumed that the carbon Deposit is formed on the plug 1 plug (see Fig) and the value of insulation resistance between the Central electrode 13 and the electrode 14 connected to the mass, is reduced. Then, according to figure 2(b), at a time when the primary current begins to flow through the coil 2 of the ignition (at time t1 growth signal ignition control), leakage current flows between the Central electrode 13 and the electrode 14 connected to the mass of the candle 1 ignition in the same direction as the ion current, as a result of interference voltage in the secondary coil 22. Leakage current occurs immediately after the primary current begins to flow through the coil 2 of the ignition, and increasing the degree of deposition of soot period of time during which the leakage current tends to increase.

At the end of the ignition voltage is applied between the Central electrode 13 and the electrode 14 connected to the mass of the candle 1 ignition using a charging voltage of the capacitor 53. Accordingly, when the value of insulation resistance between the Central electrode 3 and the electrode 14, United on the mass decreases due to carbon deposits, according to figure 2(b), the leakage current flows between the Central electrode 13 and the electrode 14 connected to earth in the same direction as the ion current, also after LC-resonance (after discharge). Thus, if the ignition is carried out in the presence of carbon, ion current and the leakage current flowing from overlapping each other after LC-resonance. However, the ion current disappears for a short period of time, then continues to flow only leakage current. Thus, when registering leakage current, registering it at the time t4 after the disappearance of the ion current, it is possible to register only the leakage current with high accuracy without influence of ionic current.

As described above, when the formation of soot on the plug 1 plug the leakage current flows at a time when the primary current begins to flow through the coil 2 of the ignition (at the time t1, the rising signal of the ignition control) and after LC-resonance (time t4).

Thus, by registering the leakage current at the time when the ionic current is not generated, can be estimated (register) the value of insulation resistance candles 1 ignition based on the value of the leakage current. In this example, the ECU 6 engine registers leakage current after LC-resonance (time t4) on the basis of the signal output circuit 5 registration current for the purpose of assessing the insulation resistance values.

If p is by fouling due to deposition of soot, on spark ignition settled conductive deposits, the value of insulation resistance is additionally reduced and the leakage current increases. However, registering only the leakage current, it is impossible to determine whether the decrease in the insulation resistance values of carbon or conductive deposits.

Meanwhile, the ECU 6 of the engine includes a CPU, ROM, RAM, backup RAM and the like In the ROM stores various control programs, maps that are accessed by these different programs with the performance, etc. of the CPU carries out processing operations on the basis of various control programs and maps stored in the ROM. In addition, the RAM acts as a memory temporarily stores the result of the operation of the CPU, the data coming from each sensor and the like, while the backup RAM is a nonvolatile memory that stores data and the like to be saved after stopping the engine.

The ECU 6 engine provides various types of motor control based on the reception signals from various sensors installed in the engine. In addition, the ECU 6 engine performs processing to counteract the deposition of soot/definitions conductive carbon, which will be described below. Note that the ECU 6 of the engine includes a counter measures against Nagar. In addition, to the ECU 6 of the engine connected signal light 8, the impact is giving the driver to carry out maintenance candles 1 ignition.

In addition, in this example, in addition to the ECU 6 engine provides ECT_ECU (electronic control unit automatic gearbox with electronic control) 7, managing automatic transmission.

ECT_ECU 7 is able to exchange data signals with the ECU 6 of the engine.

ECT_ECU 7 includes a CPU, ROM, RAM and the like, and the ECU 6 of the engine.

_ECU 29 selects the mode shift from the ROM based on the input values of various sensors, etc. from the ECU 6 engine, data signals indicating results of operations, etc., status position switch automatic transmission gearbox, etc. and produces the control signal by shifting the drive control of the automatic transmission in accordance with the regime shift. In addition, when the mode shift comes from the ECU 6 of the engine when performing the following processing counteract the deposition of soot/definitions conductive carbon, ECT_ECU 7 generates the control signal by shifting the drive control of the automatic transmission on the basis of the mode switching gear.

Processing counteract the deposition of soot/definitions conductive carbon

First, we describe the activation of purification of carbon and the temperature evaluation candles", implemented by the ECU 6 engine, as well as the coefficient estimates of the EF is aktivnosti measures against carbon".

Activation of purification of carbon

In this example, taking into account the effect of enhancing the cleaning of carbon, i.e. effect, which allows to obtain treatment as a result of rupture of carbon-carbon connection with increase of the temperature of the insulator 12 candles 1 ignition operating condition switches to raise the temperature of the insulator 12 (candle 1 ignition) with the objective of enhancing cleaning of sludge. A specific method for implementing measures against carbon will be described with reference to figure 4.

Figure 4 shows a family of isotherms spark plugs of a car with automatic transmission, the engine speed and the load factor are used as parameters. From figure 4 it follows that in a car with automatic transmission, even at a constant vehicle speed, the temperature of the candle 1 ignition above, when the vehicle is traveling at a lower transmission that enables the purification of carbon.

In this example, on the basis of a family of isotherms, shown in figure 4, map of the growth temperature of the candle (mode shift map) to raise the temperature of the candle 1 ignition is generated in advance through experiments, calculations, etc. and stored in the ROM of ECU 6 engine. To further increase the temperature of the candle 1 ignition should be set to this mode shift, which is biret a lower gear, however, there is a lower limit of transmission depending on engine noise, ease of adjustment, vehicle speed, etc. Thus, a map of the growth temperature of candles can create with this limit.

When performing activation purification of carbon (measures against carbon), the ECU 6 engine accesses the map growth temperature candles and selects the mode switching gear to raise the temperature of the candle 1 ignition, and ECTECU 7 generates the control signal by shifting the drive control of the automatic transmission on the basis of the mode switching gear. Processing is carried out at the step ST3, specified in the logical block diagram shown in figure 3.

The temperature evaluation candles

In this example, to determine the effectiveness of cleaning depending on the temperature of the candle 1 ignition, the ECU 6 engine evaluates the temperature of the candle 1 ignition. In particular, on the basis of a family of isotherms shown in figure 4, the map estimate of the temperature of the glow plug (see figure 5), where the engine speed and the load factor are used as parameters, is created in advance and stored in the ROM of ECU 6 engine. The temperature of the candle 1 ignition is assessed by reference to the map estimation of the temperature of a candle. Evaluation of the temperature of a candle, the processing performed at the step ST5, specified in the logical block diagram, shown is figure 3.

Rate the effectiveness of the measures against Nagar

Turn to the description of the coefficient α of the effectiveness of the measures against carbon that is used to increase/decrease counter measures against fouling during the processing of determining the conductive deposits.

First of all, the time required for purification of carbon depends on the temperature of the spark plug. For example, under 6 when the temperature of the candle 1 ignition time required for purification of carbon reduced. Considering such characteristics, in this example, the map in which the coefficient α of the effectiveness of the measures against carbon increases with the increase of the effect of treatment per unit time (i.e. when the temperature of the candle 1 ignition) is created in advance through experiments, calculations, etc.

In particular, according to the map above temperature estimation candles (see figure 5) the temperature of the candle 1 ignition can be estimated based on engine speed and load factor. Thus, according to Fig.7 creates a map that defines the coefficient α of the effectiveness of the measures against carbon (for example, an integer 1, 2, 3, ..., n), where the engine speed and the load factor are used as parameters and stored in the ROM of ECU 6 engine. Then, at step ST4 in the logical block diagram shown in figure 3, is determined by the ratio α the effectiveness of measures against fouling by card access, shown in Fig.7, based on current engine speed and load factor.

Here, the coefficient α of the effectiveness of the measures against carbon not required to be a positive number, in a state where there is a tendency to the accumulation of soot, for example, immediately after starting the engine, when the engine is in a cold state, the counter measures against carbon should be reduced. Thus, for example, at low coolant temperature coefficient α of the effectiveness of the measures against fouling can be defined using a card having a negative coefficient α of the effectiveness of the measures against Nagar.

Now describe the processing counteract the deposition of soot/definitions conductive carbon, implemented by the ECU 6 engine, with reference to the logical block diagram shown in figure 3. The procedure is performed with a prescribed interval, such as every few milliseconds. Alternatively, the procedure can be performed at every prescribed angle of rotation of the crankshaft.

At step ST1, the value of insulation resistance candles 1 ignition evaluated through the above processing, on the basis of the signal output circuit 5 registration current (signal reception power), and a conclusion, is less whether the evaluation value of the insulation resistance of the prescribed values. If d is a query result of the determination in step ST1 is "Yes", it is concluded that there was deposition of carbon or conductive deposits on the plug 1 plug and the process goes to step ST2. If the result of determination at step ST1, "No", it is concluded that the deposition of carbon and conductive deposits on the plug 1 plug was not, and the process goes to step ST5.

Note that the value empirically obtained in advance through experiments, calculations and the like, is set as a critical value (prescribed value) at step ST1, taking into account the insulation resistance values when the sludge, etc. is deposited on the insulator 12 candles 1 ignition.

At step ST2, it is determined whether the value of counter measures against carbon prescribed value. If the result of determination is "No", the process goes to step ST3, and if the result of determination is "Yes", the process goes to step ST8. At step ST2, at the initial stage, yet measures against carbon is not taken, the counter measures against carbon is 0.

Note that the value empirically obtained in advance through experiments, calculations, etc. to determine whether sufficient measures have been taken against fouling to prevent the formation of soot on the plug 1 plug, is set as a critical value (prescribed value) at step ST2.

At step ST3, the mode shift AB is omatically transmission is specified by referring to the map above the growth temperature of the candle on the basis of the current engine speed and load factor, to raise the temperature of the candle 1 ignition, thereby activating the cleaning of carbon (measures against carbon). After taking measures against fouling step ST3, the process goes to step ST4. Determination of the coefficient α of the effectiveness of the measures against carbon is made by reference to the map shown in Fig.7. on the basis of engine speed and load factor after taking measures against carbon, and the counter measures against Nagar updated (counter measures against carbon + α). This procedure ends.

Then, if the result of determination at step ST1, "No", at step ST5, a call is made to the map estimation of the temperature of the candle shown in figure 5, on the basis of engine speed and load factor for the evaluation of the temperature of the candle 1 ignition, and a determination is made whether the estimated temperature of the candle to 300°C. If the result of determination at the step ST5, "No", the temperature of the candle 1 ignition is defined as the temperature at which the soot cannot be removed in the self-cleaning mode, and the counter measures against carbon reset (counter measures against carbon = 0) on the stage ST7. If the result of determination at the step ST5, "Yes", the temperature of the candle 1 ignition is defined as the temperature at which the carbon can be removed in the self-cleaning mode, and the process goes to step ST6. Although the condition for determination at the step ST5, i.e. temperature, serving as a critical value to determine whether to remove the carbon to remove the self-cleaning mode, set to 300°C, the temperature is not limited to this value. For example, as the critical value, you can use any value in the range from 300 to 550°C, depending on the characteristics of the engine, etc.

At step ST6, it is determined coefficient β assess the effectiveness of treatment on the basis of the estimated temperature of the candle 1 ignition, and the counter measures against Nagar updated (counter implementation of countermeasures + β). The β coefficient estimates of abatement efficiency is defined with respect to temperature spark plugs, and the time required for purification of carbon, shown in Fig.6, so it increases with the difference between the estimated temperature of the candle 1 ignition and the reference temperature is set equal to, for example, 300°C, i.e. with the increase in the estimated temperature of the candle 1 ignition. Note that for β coefficient estimates of abatement efficiency is empirically obtained in advance through experiments, calculations and the like (for example, an integer 1, 2, 3, ..., n) is given in the form of maps, where the temperature of the candle 1 plug is used as the parameter, and the map stored in the ROM of the ECU 6 of the engine.

With the above about the development of counter-deposition of soot/definitions conductive carbon when the estimated value of the insulation resistance of the spark 1 ignition a little, it is concluded that there was a deposition of carbon or conductive deposits on the plug 1 plug, and measures against carbon deposits made at step ST3. In accordance with the status of the implementation of measures against carbon counter measures against Nagar updated (counter implementation of countermeasures + α). Meanwhile, even when the estimated value of the insulation resistance of the spark 1 ignition high, and in the absence of deposition of carbon or conductive deposits on the plug 1 plug, if the temperature of the candle 1 ignition so high that possible self-cleaning (for example, 300° or higher), counter measures against Nagar updated (counter implementation of countermeasures + β).

When the value of counter measures against carbon exceeds the prescribed value, it is concluded that it has taken sufficient measures against sludge and that the deposition on the glow plug 1 plug was overcome. Here, in the absence of deposition of conductive deposits on the plug 1 plug, because the deposition was overcome, the estimated value of the insulation resistance of the spark 1 ignition high enough to exceed the prescribed value. If the conductive sediments settled to the glow plug 1 plug, the estimated value of the insulation resistance of the spark 1 ignition reduces the I does not exceed the prescribed value. Thus, in this example, if the value of counter measures against carbon exceeds the prescribed value, i.e., if measures against carbon sufficiently carried out, but the state in which the estimated value of the insulation resistance of the spark 1 ignition little remains, it is concluded that the deposition of conductive deposits.

As described above, according to the processing counteract the deposition of soot/definitions conductive carbon in this example, determination is made less whether the evaluation value of the insulation resistance of the spark 1 ignition prescribed value in a state in which they were taken sufficient measures against Nagar, allowing you to determine the presence/absence of deposition of conductive deposits on the plug 1 plug. When the deposition of conductive sediments, turn signal light 8 (step ST8), which allows to take measures that encourage the driver to carry out maintenance candles 1 ignition.

In addition, activation of purification of carbon (measures against carbon) by switching the operating state of the engine to raise the temperature of the candle 1 ignition that allows you to avoid the problems associated with the purification method, for example, purification of carbon by giving the spark plug has a special form, to clean the carbon deposits from the use of auxiliary e is ctrada, purification of carbon by the use of multiple discharge and the like, for example, problems such as reduction of flammable ability, increased cost, increased power consumption, reduced maintenance spark plugs, etc.

Other embodiments of the

In the above example, taking measures against carbon, consisting in the change of regime shift of the automatic transmission, however, this is not the only possible implementation. In a vehicle with a continuously variable transmission (CVT), it is possible to take such measures against carbon as switching the gear ratio of CVT to raise the temperature of the candle 1 ignition. Alternatively, instead of such a method of switching the operational state can be taken, for example, other measures against carbon, for example, purification of carbon by giving the spark plug has a special form, to clean the carbon deposits from the use of an auxiliary electrode, purification of carbon by the use of multiple discharge etc.

In the above example, it is possible to take measures such as encouraging the driver to carry out maintenance spark plugs by incorporating a light signal when the deposition of conductive sediments, however, you can take other measures. For example, when the deposition of conductive sediments, can be the to take measures to control the operational state of the engine to reduce the temperature of the spark plug, in addition to the light signal. Through these efforts, you can achieve the following effect.

In particular, in the example where the conductive deposits represent the semiconductor deposition, when the temperature of the spark plug leakage current decreases and the decrease of the insulation resistance values due to conductive deposits weakens, so the chance of misfire is reduced. Thus, it is possible to counteract the flow of unburned fuel mixture on the catalyst in the exhaust system and to prevent damage to the catalytic Converter.

Note that examples of the method of reducing the temperature of the spark plug by controlling the operational status of the engine include regime change gear of the automatic transmission, the shift time mode ignition, the change of the amount of EGR, etc.

It should be understood that disclosed here, embodiments of serve to illustrate, but not limit in all respects. Scope of the present invention defined by the attached claims and not the foregoing description, and is intended to include any modifications, equivalents, as defined by the claims.

1. The ignition device of an internal combustion engine having a spark plug containing the registration tool to register the values of the fight the Oia isolation spark plugs, the tool measures against carbon measures against carbon deposits on the spark plug, the tool of reference for starting the implementation status of measures against carbon and tool definitions to determine the deposition of conductive deposits on the spark plug when the value of counter measures against carbon exceeds the prescribed value and the insulation resistance of the spark plug is less than the prescribed value.

2. The ignition device of the internal combustion engine according to claim 1, which also includes the incorporation of a light signal when the deposition of conductive deposits on the spark plug.

3. The ignition device of the internal combustion engine according to claim 1, which also contains the means to control the operational status of the internal combustion engine to reduce the temperature of the spark plug when the deposition of conductive deposits on the spark plug.

4. The ignition device of the internal combustion engine according to claim 1, which also contains the vehicle registration current registration current, which flows between the electrodes of the spark plug when a voltage is applied between the electrodes; means for obtaining values of insulation resistance of the spark plug on the basis of the current value registered by the registration tool current.

5. The ignition device is an internal combustion engine according to any one of claims 1 to 4, in which the tool measures against carbon includes a means to enhance the purification of carbon by switching the operating state of the internal combustion engine to increase the temperature of the spark plug.

6. The ignition device of an internal combustion engine having a spark plug in which the ignition device registers the value of the insulation resistance of the spark plug, take measures against carbon deposits on the spark plug, counts the status of the implementation of measures against sludge and determines the deposition of conductive deposits on the spark plug when the value of counter measures against carbon exceeds the prescribed value and the insulation resistance of the spark plug is less than the prescribed value.

7. The ignition device of the internal combustion engine according to claim 6, in which the ignition device includes a light signal when the deposition of conductive deposits on the spark plug.

8. The ignition device of the internal combustion engine according to claim 6, in which the ignition device controls the operating state of the internal combustion engine to reduce the temperature of the spark plug when the deposition of conductive deposits on the spark plug.

9. The ignition device of the internal combustion engine according to claim 6, in which the device zagig is of registers current, which flows between the electrodes of the spark plug when a voltage is applied between the electrodes, and retrieves the value of the insulation resistance of the spark plug based on the value registered in the current.

10. The ignition device of the internal combustion engine according to any one of p-9, which measures against carbon is carried out by activating the cleaning of carbon by switching the operating state of the internal combustion engine to increase the temperature of the spark plug.



 

Same patents:

The invention relates to the field of engine construction and can be used for diagnostics and control of internal combustion engines

The invention relates to electrical engineering, in particular to devices for measuring the parameters of the spark discharge in the spark plugs

Ice ignition device // 2367813

FIELD: engines and pumps.

SUBSTANCE: proposed invention relates to automotive ICE ignition devices. Proposed ignition device comprises ignition plug insulance recorders, anti-carbon devices, those to record the state of aforesaid anti-carbon devices and those to reveal conduction carbon deposits on ignition plug. With insulance falling below preset magnitude, engine is switched over to conditions allowing increasing ignition plug temperature. At aforesaid temperature, plug insulator cleaning of carbon deposit is intensified, the intensification process being recorded. With anti-carbonisation process readings exceeding preset ones and insulance below designed magnitude, increased carbon deposition is revealed and decided upon. In aforesaid case, light alarm signal on necessity of servicing ignition plug is issued.

EFFECT: intensification of carbon deposit removal from ignition plug.

10 cl, 8 dwg

FIELD: physics.

SUBSTANCE: method of determining test discharge parametres of capacitive ignition systems which consist of an ignition assembly, ignition cable and a spark plug, involves picking up a discharge current and voltage signal and determination of values of discharge parametres. The discharge current and voltage signal is picked up using analogue sensors. The current and voltage signals are picked up in auxiliary "short circuit" and "test load" modes, as well as in the main operation mode of the ignition system. Measurements are taken in digital form with given sampling frequency. Values of characteristic primary parametres are distinguished from measurement results. Values of intermediate parametres are determined for each assigned measurement mode using the obtained values of characteristic primary parametres. Values of test discharge parametres are determined using the obtained values of intermediate parametres.

EFFECT: possibility of measuring primary discharge parametres in digital form, picked up by analogue current and voltage sensors, more accurate measurement, obtaining information on efficiency of the spark plug and ignition system, discharge mode and energy factors and their change during operation or during an experiment.

3 dwg

FIELD: electricity.

SUBSTANCE: ignition plug (BR) is connected to generator (GEN) containing variable capacitor. The above generator includes also polarisation tools (MPOL) with option of ignition plug (BR) polarisation, which are connected between generator (GEN) and ignition plug (BR), and measurement instruments (MMES) for measurement of ion current at ignition plug (BR), which are connected between variable capacitor (Cb) and chassis ground.

EFFECT: improvement of measurement accuracy.

8 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: device for radio frequency ignition includes control aids (5) designed with possibility of ignition control signal (VI) generation, power circuit (2) controlled by ignition control signal (VI) for power voltage supply to output interface (OUT) of power circuit at frequency determined by control signal, at least one resonator (1) of plasma generation connected to output interface of power circuit and designed with possibility of spark generation between two electrodes (10, 12) of ignition of the resonator during ignition command. This device includes means (6) for measuring of electrical parameter characterising change of resonator power voltage, module (7) for determination of state of electrodes contamination depending on measured electrical parameter and predetermined control value.

EFFECT: enhancing diagnostics of contamination state of radio-frequency coil-plug electrodes.

11 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed device comprises voltage generator 5 and ignition unit 9 including ignition plug 4 and switch 7 arranged between plug feed terminal and generator output. Switch 7 allows connecting voltage generator output with said ignition plug 4 in response to command signal VI. Device comprises electronic control unit UC to generate said command signal VI. Said electronic control unit UC comprises means M to measure magnitudes characterising generator output voltage variations in time and device A to vary current voltage and/or frequency depending upon magnitudes set by said measuring means. Generator output voltage variation describes health of ignition plug (new or worn-out).

EFFECT: control over quality of plug spark.

9 cl, 2 dwg

FIELD: electrical engineering.

SUBSTANCE: invention relates to a measurement device, comprising the following components: radio frequency ignition power supply circuit (2) containing a transformer (T) the secondary winding whereof (LN) is connected to at least of resonator (1) having resonance frequency in excess of 1 MHz and containing two electrodes (11, 12) designed so that to enable spark generation when an ignition command is given; measuring capacitor (Cmesure) placed in series between the secondary winding and the resonator; circuit (DIFF) for measurement of current (Iion) of gases ionisation during burning inside a cylinder of the internal-combustion engine linked to the resonator. The said measurement circuit is connected to the measuring capacitor contacts and/or - circuit (RED) for measurement of voltage (Vout) on the resonator electrodes contacts when an ignition command is given. The circuit is connected to the measuring capacitor contacts.

EFFECT: possibility of simultaneous measurement of ionisation current and voltage.

8 cl, 4 dwg

FIELD: aircraft engineering.

SUBSTANCE: proposed method comprises measurement of time interval between sequential reservoir capacitor discharge current pulses running to spark plug and caused solely by switching of power stored at said capacitor and exceeding the preset check magnitude. Measured time interval is compared with preset time interval which describes the minimum repetition rate of spark discharge in the plug spark gap. Simultaneously, absence of the plug coaxial shielding ceramic insulator outer surface glow through slot is controlled, slot being made in plug body parallel with its axis. In operation of ignition system its serviceability is continuously defined. This is performed by the absence of the plug coaxial shielding ceramic insulator outer surface glow and difference between measured time interval and preset time interval which describes the minimum repetition rate of spark discharge in the plug spark gap.

EFFECT: higher validity of control.

3 dwg

FIELD: engines and pumps.

SUBSTANCE: control over engine cylinder including the ignition plug consists in decreasing of the cylinder load in response to advance ignition caused by deterioration in ignition plug parameters. Fuel-air mix is enriched in the cylinder in response to advance ignition caused by deterioration in ignition plug parameters.

EFFECT: higher accuracy of determination of deterioration in ignition plug parameters.

6 cl, 3 dwg

FIELD: transport.

SUBSTANCE: invention relates to field of transport and can be used for combustible mixtures ignition by means of electric spark, in particular in capacitive ignition systems for ignition system control, installed on aircraft engine, for ignition system technical condition evaluation in intervals between aircraft engines start-ups. Aircraft engines capacitive ignition system control device includes discharge current sensor, comparator, discharge current amplitude voltage check value setting device, time interval meter, actuator. Discharge current sensor output is connected to comparator first input, discharge current amplitude voltage check value setting device output is connected to comparator second input. Time interval meter output is connected to actuator. Control device additionally includes ambient environment pressure measuring transducer, containing serially connected ambient environment pressure sensor, amplifier, ambient environment pressure control voltage setting device, second comparator, univibrator, logical device "AND". Ambient environment pressure measuring transducer output is connected to second comparator first input. Ambient environment pressure control voltage setting device output is connected to second comparator second input, comparator output is connected to univibrator input, which output and second comparator output is connected to logical device "AND", by output connected to time interval meter input.

EFFECT: technical result is increasing of aircraft engines capacitive ignition system serviceability control reliability.

1 cl, 1 dwg

Up!