Plasma radio frequency generator

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

 

The present invention generally relates to the field of radio frequency devices generating a plasma containing a spark plug to initiate combustion of the fuel in the combustion chamber of the internal combustion engine.

In particular, an object of the present invention is the wireless device generating a plasma containing:

generator voltage; and

at least one ignition unit, with the specified ignition module contains:

- the spark plug, configured to generate sparks when lit the candle serves voltage; and

switch installed between the power contact of the candles and the generator output voltage, the switch is configured to electric and selective connection of the generator output voltage with the specified power contact candle upon receipt of the command signal applied to the control contact of the specified circuit breaker;

the device further comprises an electronic control unit connected electrically with the specified control contact of the specified switch and configured to generate a specified command signal.

Candles RF devices generating plasma is configured to generate sparks or plasma to ensure the initiation of combustion. Therefore, ntrol over time the quality of sparks, created by the candle is of the utmost importance.

In this context, the present invention is directed to the creation of the radio frequency device is generating the plasma, allowing you to control the quality of sparks produced by the RF candle.

In this regard, the wireless device generating a plasma is characterized by the fact that the electronic control unit includes means for measuring values, characterizing the change in time of the output voltage of the generator voltage, where the device includes means for changing the voltage and/or frequency of the electric current supplied to the specified power contact candle, depending on the values measured by these measuring means.

This new device has special advantages, as it allows you to:

- to measure parameters related to changes in the output voltage of the generator, and this change reflects the state of candles, fed by the generator; and

to change the voltage and/or frequency of the electric current powering this candle, considering that it is the voltage and the frequency are parameters that determine the quality of the generated spark.

Thus, the device in accordance with the present invention allows to change the voltage candles depending on the measurement voltage to the E. describe the state of wear or contamination candles or for example, defective spark (separation of too low intensity...).

Indeed, as shown in figure 2, which will be described below, the supply voltage of the worn or dirty spark tends to be less rapid decrease than the supply voltage of a new candle. So, thanks to the device in accordance with the present invention, it is possible to change the voltage generated by the generator, depending on the state of candles and, in particular, its ability to dissipate electrical energy to create sparks. For example, you can provide increase in the specified nominal voltage, which should lead generator on this candle.

You can, for example, to provide that the electronic control unit contains means for comparing the measured values with theoretical values pre-stored in the memory device.

This run allows you to check the status of candles depending on the pre-recorded values, which were obtained by measurements on the test bench standard candles.

You can, for example, to provide that the electronic control unit was connected electrically with the specified generator voltage and the generator voltage was performed with the possibility of changing the output voltage of the generator according to tsignal generator control, issued by the electronic control unit.

This execution allows the electronic control unit, which receives the measurement of the output voltage of the generator, to process these measurements to generate the control signal generator so that it is adapted in the end, its output voltage to improve the quality of the spark produced by the spark.

You can, for example, to electrically connect the electronic control unit with the specified generator voltage and to adjust the generator voltage to change the frequency of the electric current generated at the output of the generator, depending on a control signal generator, issued by the electronic control unit.

This execution allows the electronic control unit, which receives the measurement of the output voltage of the generator, to process these measurements to generate a control signal generator, which generator adjusts its output frequency. This run improves the quality of the spark produced by the spark, by adapting the frequency of the supply.

You can, for example, to run the specified switch with the ability to change the frequency of the electric current supplied to the specified power contact candle, depending on the specified command signal generated from asanam electronic control unit.

In this embodiment, the signal control switch is used to change the frequency of the current supplied to the candle.

You can, for example, be provided to the wireless device generating a plasma contained several blocks ignition of a specific type, each switch of each ignition unit connected to the specified generator voltage and with the specified control block.

This run allows you to manage multiple spark plugs according to the same principle of measuring the time variation of the output voltage of the generator when power is supplied to one of the candles, then depending on this measure is to assess the state of wear of this candle so that, if necessary, to influence the voltage of its power.

You can, for example, to ensure that every ignition module took command signal corresponding to the control unit.

This feature allows you to individually manage each switch of each of the ignition module and, therefore, allows you to control the duration of the power of each candle and, if necessary, the frequency of this power, if the switch is configured to change the frequency depending on the signal.

In the preferred embodiment, and in combination with the previous option is m each switch is arranged to determine the frequency of the electric current, feeding a candle with which he is connected, depending on the received corresponding command signal.

Preferably each switch performs with the ability to determine the frequency of the electric current feeding the candle with which he is connected, so that the frequency of the power this candle was equal to the frequency it receives the corresponding command signal.

You can, for example, to ensure that the specified means of changing the voltage and/or frequency of the electric current were made with the possibility of change, depending on these values, measured on specified measuring means, each of the voltage and/or frequency of the electric currents supplied to the power contacts of each of the candles.

The object of the present invention is also a method of controlling the device to generate a plasma in accordance with the present invention, characterized by the fact that serves the electric current supply to the power contact of the spark plugs, then measured values characterizing the change in time of the output voltage of the generator voltage, compare these measured values with pre-stored in the memory of theoretical values and changes the voltage applied to the contact candle, depending on the observed deviation between the measured what values and pre-recorded theoretical values.

Tracking deviations between the measured values characterizing the change with time of the voltage, and pre-recorded theoretical values to determine the status of the candles and, in particular, the degree of energy transfer. It should be noted that theoretical value can be a parameter, such as the degree of energy transfer, which is a parameter that evaluates the rate of energy transfer new candle or pattern.

Due to this definition, the state of candles, correspondingly changing the voltage of this candle so that to improve the performance of this candle. In this case, you can increase the set rated voltage of the generator as wear/contamination candles, i.e. a decrease of the degree of energy transfer that candle.

In other words, depending on the state of candles you can make a decision about applying for this candle supply voltage other than that which was applied during the first and second measurements.

Other characteristics and advantages of the present invention will be more apparent from the following description, presented as a non-restrictive example, with reference to the accompanying drawings, on which:

figure 1 - diagram of the device generating the plasma in accordance with the present invention;

figure 2 - the two curves and the changes of the output voltage of the generator voltage depending on time for the new candles and worn-out candles.

As mentioned above, the object of the invention is a radiofrequency device, A generating plasma containing:

generator 5 voltage; and

several essentially identical blocks 9 ignition.

The voltage generator 5 is fed with direct current from the battery 2 and generates a current with variable voltage generator output.

Unit 9 ignition contains radio frequency candle 4 and the switch 7 selectively connecting the RF candle 4 generator output 5 voltage thereby to provide selective power of this candle 4.

Switch 7 includes a control contact switch, configured to receive a control signal from the switch V1 (or V2, V3, V4, depending on the ignition module), which depending on this signal connects or not electrically connects the generator 5 with the contact candle 4. If the candle is 4 receives sufficient voltage from the generator 5, it generates sparks that form the plasma, and the output voltage of the generator 5 decreases with time during the whole period of the generation of sparks.

Device A in accordance with the present invention also includes an electronic unit UC control, which is connected to the control unit ECU CM engine with which it is associated, to control A device ignition depending on the needs of the engine, equipped with this ignition device in accordance with the present invention.

The electronic unit UC management can also be connected to the voltage generator 5 so as to transmit the control signals Sg generator.

These control signals Sg generator perceived by the generator, which changes the output voltage of the generator in dependence on control signals Sg.

In this case require that the control signal generator Sg voltage depended on the comparison, at least one of the measured values (which are the values that characterize the change in time of the output voltage of the generator), with at least one predetermined value previously stored in the memory device. This comparison between the measured actual value and theoretical value is used to determine the state of wear of the candles.

Thus, the output voltage of the generator varies depending on the measured state of wear of the candle 4, which should be filed, or is receiving power from the generator.

The electronic unit UC management is connected with the output of the voltage generator 5 through a chain of dimension M, carrying out measurement of an electrical voltage at the output of the generator 5.

The electronic control unit also contains a memory in which for isany theoretical values, to characterize the degree of energy transfer candles at different stages of its life cycle.

In the private embodiment, the electronic unit UC management also includes a frequency generator, in this case a fixed frequency, which generates various signals V1 (V2, V3, V4) control applied to the switch contacts 7, which is connected to the generator 8 frequency. This frequency is chosen fixed to match the resonant frequency of candles for generating plasma of a large volume, and in this case just change the voltage.

It should be noted that the degree of energy transfer is, for example, a value characterizing the change in time of the output voltage of the generator 5, which is connected with a candle, transmitting the energy produced by the generator.

Thus, the electronic unit 7 controls the generation of sparks, transmitting the control signal from the switch V1 on the switch 7, which connects the contact candles with 7 output of the generator 5.

Upon receipt of this signal V1, the switch connects the power contact candle 4 with the output of the generator 5, which generates the output voltage value set by the signal Sg generator control.

In this case, the candle 4 generates sparks and discharges the energy at a certain speed, which thevisitor condition candles 4.

It should be noted that the operation of the radio frequency candles 4 depends on:

resonance frequency candles 4, which varies depending on the degree of wear of this candle

- set voltage start ignition, established by calibration, that is, the output voltage generated by the generator 5;

- duration spark, established by calibration.

As shown in figure 2, which shows two curves of reducing the output voltage of the generator, one of which corresponds to the work of the "worn-out TOGETHER", that is worn or dirty spark, and the other corresponds to the work of the "new TOGETHER", that is, a new candle.

It is noted that the reduction rate of the voltage more for new candle compared to the worn out candle.

The electronic unit UC management takes the dimension M of the voltage by means of the measurement values, characterizing the change in the voltage at the output of the generator 5.

Make at least two measurements to determine the speed reduction of the output voltage of the generator and, in particular, the degree of energy transfer fed candles.

In particular, the electronic unit UC control reads the voltage at the output Overdrive voltage transformer 5 at the beginning of the circuit speed control 7, i.e. at the moment when the signal V1 is transmitted to the switch 7. This scity is the W values Vdébut_all(x), characterizing the output voltage of the generator is produced at the beginning of the energization to the glow plug from the generator. Is Vdébut_all(x) is written in the memory of the control unit.

When the switch or level control 7 may be connected candle 4 with the output of the generator 5 after a time equal to the duration of the spark, the computing unit 6 reads the output voltage of the step-up transformer voltage 5.

Is Vfin_all(x)characterizing the output voltage of the generator shortly before the termination of the power of a candle, read and write in the memory of the electronic unit UC control.

It should be noted that these moments of the beginning and end can be easily calculated, because they are determined by the control unit, which controls the switch 7 by means of the signal V1.

Given the presence of several blocks 9 ignition, "x" denotes the sequence number of multi-strike spark cylinders No. 1, 2, 3 and 4-cylinder engine.

After writing to the memory voltages Vdébut_all(x) and Vfin_all(x) for each candle sequence number "x" compute the value for each candle, which characterizes the change in time of the output voltage of the generator, i.e. characterizing the voltage of each spark sequence number "x".

In this case, characterizing this value is the value of the

which is a dimensionless quantity.

This value characterizes the degree of wear of the candle with a serial number "x"is compared with theoretical values of the degree of energy transfer to generate the adjustment value to generate a signal Sg generator control, establishing a predetermined voltage at the output of the generator at the beginning of the power of this candle is "x".

The correction value in this case can be obtained by linear interpolation using table functions "degree of energy transfer". This table establishes the correspondence between the measured degree of energy transfer" and theoretical "degree of energy transfer", which corresponds to the correction value used to determine the specified nominal output value of the generator.

For example, the factor corrections obtained using the table data, you can add to the set to the nominal voltage of a new control component to determine a new set rated voltage of the generator output, with the specified new setting takes into account the wear of the candles.

1. The wireless device (A) generating a plasma containing:
the generator (5) voltage and,
at least one unit (9) ignition, with the specified block (9) tagihan what I contains:
candle (4) plugs made with the possibility of generating a spark between the two electrodes of the candle when the candle (4) is energized; and
switch (7)is installed between the power contact plug (4) and the output of the generator (5) voltage, and the switch (7) is made with the possibility of electric and selective connection of the output of the generator (5) voltage with the specified power contact candle (4) upon receipt of a command signal (V1), filed on the control contact of the specified switch (7);
moreover, the device further comprises an electronic unit (UC) control connected electrically with the specified control contact of the specified switch (7) and is arranged to generate a specified command signal,
this electronic control unit (UC) provides the measure (M) values, characterizing the change in time of the output voltage of the generator (5) voltage, where the device includes means for changing the voltage and/or frequency of the electric current supplied to the specified power contact candle, depending on the values measured by specified means (M) of dimension
moreover, the electronic unit (UC) control is connected electrically with the specified generator (5) voltage, and the generator (5) voltage is arranged to change the output voltage is I of the generator depending on the signal (Sg) of the control generator, issued by the electronic control unit (UC) control.

2. The wireless device generating a plasma according to claim 1, characterized in that the electronic unit (UC) control includes means for comparing the measured values with theoretical values pre-stored in the memory device.

3. The wireless device generating a plasma according to claim 1, characterized in that the electronic unit (UC) control electrically connected to the specified generator (5) voltage, and the generator voltage is arranged to change the frequency of the electric current generated at the output of the generator (5), depending on the signal (Sg) generator control issued by the electronic control unit (UC) control.

4. The wireless device generating a plasma according to claim 1, characterized in that the switch (7) is arranged to change the frequency of the electric current supplied to the specified power contact candle (4), depending on the specified signal (V1) control generated by the specified electronic control unit (UC) control.

5. The wireless device generating a plasma according to claim 1, characterized in that it contains several blocks (9) ignition of the specified type, with each switch (7) each ignition unit connected to the specified generator (5) voltage and with the specified block (UC) control.

6. The wireless device generating a plasma according to claim 5, characterized in that each block (9) ignition receives the signal (V1, V2, V3, V4) of the control that corresponds to this block (9) ignition.

7. The wireless device generating a plasma according to claim 6, characterized in that the said means of changing the voltage and/or frequency of the electric current is arranged to change depending on values measured by specified means (M) of measurement, each of the voltage and/or frequency of the electric currents supplied to the power contacts of each of the candles (4).

8. The method of controlling the device generating plasma according to any one of claims 1 to 7, characterized in that serves the electric current supply to the power contact candle (4) plugs, then measured values characterizing the change in time of the output voltage of the generator (5) voltage, these measured values are compared with theoretical pre-recorded values and changes the voltage applied to the contact plug (4), depending on the observed deviation between the measured values and theoretical pre-recorded values.

9. The control method of claim 8, characterized in that for measuring values, characterizing the change in time of the output voltage of the generator (5) voltage, raissadat first measurement of the output voltage of the generator voltage, since the beginning of power on this candle device (Vdebut_all(x)), then after the said first dimension to produce a second measurement of the output voltage of the power generator before stopping the power supply to this candle (Vfm_all(x)).



 

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