The device control system health ignition and adjustment fuel system of gas turbine engine

 

The invention relates to electrical engineering, in particular to devices for measuring the parameters of the spark discharge in the spark plugs. The device includes a serially connected voltage divider, the limiter amplitude signal, a rectifier, a delay circuit, the first comparator, a counter, a register, an arithmetic unit of multiplication and the display unit. Thus the output of the delay circuit is connected also to the input of the second comparator and measuring the repetition period of the pulses, the outputs of which are connected respectively to the inputs of the element And block arithmetic multiplication. The second input element And is connected to the output of one-shot, the input connected to the output of the first comparator. The output element And is connected to the inputs of the counter and the register. To the input of the reset of the counter is connected to the output of the sensor fuel. The invention provides the ability to configure the fuel equipment, due to the measurement delay time getting fuel in the discharge gap of the spark. 2 Il.

The invention relates to electrical engineering, in particular to devices for measuring the parameters of the spark discharge in the spark plugs, and can be used for ismeca.

Known measuring the duration of the spark.with. The USSR №1679416, CL G 01 R 29/02, publ. 23.09.91) containing the current sensor, the two discriminator level, a peak detector, the discriminator level, one-shot, item, unit of account, and the output of the current sensor is connected to the input of the two-threshold discriminator level, the output of which is connected to the input of the peak detector, the output of the latter is connected to the input of the discriminator and the input of one-shot, the output of the discriminator level is connected to the first input element And the second input element And is connected to the output of one-shot, the output element And is connected to the input unit of account.

Measuring the duration of the spark can be used to monitor the health of the ignition system, because the meter shows the presence of a spark in the spark, however, device functionality is not applicable for measuring the time delay between start of injection and the time of exposure of the fuel in the discharge gap of the spark.

This problem occurs when you configure the starting fuel system of the engine. A necessary condition for ignition of the combustible mixture in the combustion chamber is getting the mixture in the spark gap in this candle, since it is known that the wetting of the candle fuel leads to an increase of the voltage drop in the candle. If the fuel does not fall within the spark gap of the spark, or is adjudged to be significantly delayed, then it indicates a deviation in the setting of the starting fuel equipment, because moments include candles and starting valves fuel system linked by a sequence diagram for starting a gas turbine engine.

There is also known a method of controlling an electric ignition system by measuring the voltage drop in the spark stage of discharge in the glow and comparing it with a reference value.with. The USSR №1106207, CL F 02 7/266, publ. 30.07.84, bull. No. 28), which can be used to control the quality settings of the fuel equipment based on the determination of the presence or absence of fuel in the spark gap of the spark during engine start. To the disadvantage of the method include that it is not determined by the time delay between start of injection and the time of exposure of the fuel in the discharge gap of the spark, which limits the informative value of the control.

The closest to the technical nature of the claimed device is measuring the duration of the preparatory stage of discharge in the spark ignition (veterator clock pulses, the time selector, a memory unit, a memory management unit, a decoder, a block of the digital display, while the output of the voltage divider, to develop a voltage at the glow plug, is connected to the comparator input, the level of the threshold comparator is selected greater than the voltage drop in the candle, the output of the comparator connected to the first input time selector to the second input of the latter is connected a generator of clock pulses, the output of the comparator is also connected to the control input of the counter and to the input of a memory management unit, the output of the latter is connected to the control input of the memory block, the output time selector is connected to the counting input of the counter, the yield of the latter is connected with the information input of the memory block, the yield of the latter is connected to the input of the decoder, the output of the latter is connected with the block of the digital display.

The disadvantage of this device lies in the fact that their functionality is not applicable for measuring the time delay between start of injection and the time of exposure of the fuel in the discharge gap of the spark.

The invention aims to expand the functionality of the monitoring device, providing the ability Nasti in relation to the time of fuel supply.

This object is achieved in that in the device control system health ignition and adjustment fuel system of gas turbine engine containing a counter, a comparator, a voltage divider and a display unit, unlike the prototype, introduced the limiter amplitude of the signal, the rectifier circuit delay, sensor, fuel supply, the case, the meter pulses repetition period, block arithmetic multiplication, one-shot and the logical element And the output of the voltage divider is connected to the input of the limiter amplitude signal, the output of which is connected to the input of the rectifier, the output of the latter is connected to the delay circuit, the output of which is connected both to the input of the second comparator, the input of the meter pulse repetition frequency and the input of the first comparator, the output of the latter is connected simultaneously to the input of one-shot and the counting input of the counter, the output of which is connected to the input register, the output of which is connected to the input of the arithmetic multiplication, the output of the latter is connected to the input of the display unit, while the output of the second comparator connected to the first input element And the output of the one-shot is connected with the second input element And the output of which is connected the fuel is connected to the input of the reset of the counter.

In Fig.1 shows a block diagram of the inventive device of Fig.2 is a timing diagram of operation of the claimed device.

The device contains a voltage divider 1, the limiter amplitude of signal 2, a rectifier 3, a delay circuit 4, the flow sensor fuel 5, the first comparator 6, the second comparator 7, the one-shot 8, the counter 9, the logical element And 10, case 11, the measuring period of the pulse 12, block arithmetic multiplication 13, display unit 14, and the output of the voltage divider 1 is connected to the input of the limiter amplitude of signal 2, the output of which is connected to the input of the rectifier 3, the yield of the latter is connected to the delay circuit 4, the output of which is connected both to the input of the second comparator 7, the input of the measuring period pulse 12 and the input of the first comparator 6, the output of the latter is connected simultaneously to the input of one-shot 8 and the counting input of the counter 9, the output of which is connected to the input of the register 11, the output of which is connected to the input of the arithmetic multiplication 13, the yield of the latter is connected to the input of the display unit 14, while the output of the second comparator 7 is connected to the first input element And 10, the output of one-shot 8 is connected with the second input element And 10, the output of which is connected to the Chi fuel 5 is connected to the input of the reset of the counter 9.

The waveform of the voltage drop in the candle uSttaken from a voltage divider of 1, is connected to the input of the spark plug shown in Fig.2A, where indicated:and- the duration of the spark stage of discharge, tPS- the duration of the preparatory stage of discharge. Shows the timing chart of the operation of the device correspond to the time after getting fuel in the discharge gap of the spark.

The signal uStwith voltage divider 1 passes through the limiter amplitude of signal 2 and the rectifier 3 and enters the delay circuit 4, in which the filling of the gaps between the half-wave signal (Fig.2B). Then the signal at the inputs of the first and second Comparators. The threshold voltage of the first comparator Uthen.1is, obviously the larger the amplitude of the voltage drop in the candle during the spark discharge. The threshold voltage of the second comparator Uthen.2is greater than the amplitude of the voltage drop in the candle until getting fuel in the discharge gap of the spark USt. to.and smaller than the threshold voltage of the first comparator Uthen.1:USt. to.<U<U. The appearance of signals at the outputs of the pen shown in Fig.2B and 2D, respectively. The slice signal Uo.K1is the expense of a bit pulse counter. The count is done when the fuel sensor fuel. The slice signal Uo.K1is also the start of the one-shot, the delay time toneselected deliberately lower the minimum possible duration of the spark stage of discharge tI. min: tone<t. After a time tonefrom the moment the spark stage of the discharge element And the signal Uo.K2checks for the presence of the fact of getting fuel in the discharge gap of the spark, corresponding to the signal of "logical unit" on the output of the second comparator. The waveform at the output of the one-shot is shown in Fig.2D. The appearance of the signal at the output of the element shown in Fig.2E, the cut of this pulse stops the bill at the counter and allows write access to the contents of the counter register, which is fixed, thus, the number of bit pulses, being passed from start of injection to the time of exposure of the fuel in the discharge gap of the spark. To the input of delay circuit connected digital meter pulses repetition period. In the block arithmetic multiplication is the operation of arithmetische multiplying the measurement result is the delay between start of injection and the time of exposure of the fuel in the discharge gap of the spark supplied to the display unit.

Thus, the claimed invention allows to measure with high precision the length of the delay between start of injection and the moment getting fuel to the working face of the candle and, thus, provides a more extensive customization options fuel equipment, while maintaining the function of monitoring the health of the ignition system.

Claims

The device control system health ignition and adjustment fuel system of gas turbine engine containing a counter, a comparator, a voltage divider and a display unit, characterized in that the device comprises a limiter of amplitude of the signal, the rectifier circuit delay, sensor, fuel supply, the case, the meter pulses repetition period, block arithmetic multiplication, one-shot and the logical element And the output of the voltage divider is connected to the input of the limiter amplitude signal, the output of which is connected to the input of the rectifier, the output of the latter is connected to the delay circuit, the output of which is connected both to the input of the second comparator, input change the input of one-shot and the counting input of the counter, the output of which is connected to the input register, the output of which is connected to the input of the arithmetic multiplication, the output of the latter is connected to the input of the display unit, while the output of the second comparator connected to the first input element And the output of the one-shot is connected with the second input element And the output of which is connected simultaneously to the input of the write-enable register and to the input of the stop account counter, the output of the sensor fuel supply is connected to the input of the reset of the counter.

 

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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

FIELD: measurement engineering.

SUBSTANCE: device has information retard microstrip, made onto dielectric plate having relative dielectric constant of ε1. Taps of microstrip are connected with sample and store elements through switches. Control inputs of switches are connected with strobe-signal microstrip through communication elements. Strobe-signal microstrip is made onto dielectric plate having relative dielectric constant of ε2; ε1≫ε2. Plates are disposed one above the other. Sides of plates, having continuous metal coating, are connected together electrically and mechanically. Communication elements are made in form of slots brought into coincidence at back metal coating of any plate. Slots in strobe-signal microstrip are made directly above line of strobe-signal. Slots are made under row of contact areas in information retard microstrip, which plates are disposed at ΔY distance from information retard microstrip; the distance is specified by mounting dimensions of switches.

EFFECT: widened bandwidth; increased digitization frequency; improved manufacturability.

2 dwg

FIELD: measuring equipment.

SUBSTANCE: in accordance to invention, mounted onto each optical channel of registration device is an optical multiplexer, and registration device itself (oscillograph) is provided with additional demultiplexing function.

EFFECT: increased number of registration channels for one-time impulse electric signals without increasing number of channels for registration of optical signals registration device.

1 dwg

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