SU542014A1 - The analyzer of the ignition system of the internal combustion engine - Google Patents

Description

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The invention relates; to devices for diagnosing the internal combustion engine, and in particular, to the analyzers of the operation of their ignition system.

Analogizers of operation of ignition ignition, containing a sensor and measuring unit l, are known

The nonstandard of these analyzers is limited functionality, as they allow you to measure only a relatively small number of parameters of the ignition system.

Also known are analyzers of the internal combustion engine operation system, containing counter-distributor 15 for indicating the number of the cylinder under investigation, the inputs of which are connected to the ignition system signal generator and engine operation sensor through a starting unit. and the output is to the block of choice of the investigated Qi-20 linder and measuring unit 2.

These analyzers can measure a larger number of system parameters with clamps, however their functionality is also limited due to the fact that 25

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the results of the measurements depend on the DT of the speed of the engine mode,

The purpose of the plots. is an extension of FK11.ioBall :: u :: -; device capabilities,.

Delivered to: 1b DESTIGA-ts that the measuring unit is designed as a measure of the ratio of time intervals of processes in the ignition system and engine cycle, the first input of the meter is connected to the driver of the engine operation sensor, the second through the selector of measured intervals to the driver m signals of the ignition system, and control /: 1st entrance - to the block selection cylinder.

The drawing shows a block diagram of an analyzer of an ignition system of an internal combustion engine.

The analyzer is a sodermst counter-distributor 1 for indications of the number of the studied cylinder, the counting and adjusting inputs of which are connected to the generator of 3 signals from the ignition system and the driver of 4 signals of the engine cycle sensor through the starting block 2, the block 5 for selecting the cylinder under study, the input is connected with the output of the distributor counter 1, and the output with the control input of the meter 6, the ratio of time intervals. The first input of meter 6 is connected to the output of the imager 4, and the second input through the selector 7 of measured intervals to the outputs of the drivers 3. Input 8 and 9 receive signals corresponding to the primary and secondary circuits of the ignition system, and input 10 - signals of the work cycle sensor engine The meter 6 has an output 11, B. The analyzer implements a method for diagnosing the technical state of the ignition system, which consists in measuring the ratio of the duration of the various phases of the ignition system and the duration of the engine cycle. The analyzer works as follows. The counting input of the counter-distributor 1 through the start-up unit 2 receives pulses from the output of the ignition system formers 3, corresponding to the timing of the contacts of the ignition circuit breaker, and the set-up input of the counter-distributor 1 also receives pulses from the generator output 2 4 engine cycle sensor signals. As a result, each position of the distribution counter 1, and, consequently, the impulse appearing at its corresponding output corresponds in duration to the work section of a certain cylinder number. Block 5 commutes to its output a pulse corresponding to the number of the cylinder that cannot be followed. The signal from the output of block 5 is fed to the control input of the meter 6. Last, depending on the analyzer mode of operation, it either measures the period of the pulses arriving at its first input, depending on the ratio of time intervals stepping on its second input to the time interval entering the first input the meter, or counts the number of pulses at the second input for a certain number of pulses at the first input. In this case, while measuring the ratio of time intervals to the control input of meter 6 from the output of block 5, a pulse occurs, then in the process of measuring and a sequence of time intervals arriving at the second input, the meter takes into account only the time interval corresponding to the work section of the cylinder under study. When measuring with the meter 6, the pulse exploration period is performed to check the operability of the individual cylinders of the wigatel. At the first input of meter 6, the pulses from the output of the formate 4 of the sensor signal of the cycle of operation of the engine appear, and on command from block 5 they interrupt the contacts of the chopper, as a result of which there is no spark on the candle of the cylinder under study, and the cylinder is turned off. The operability of the cylinder under investigation is judged by the degree of change of the indications at the output 11 of the meter 6, which measures the period of the following pulses of the engine operation cycle. In the measurement mode, the ratio of time intervals to the second input of the meter 6 from the output of the formers 3 through the selector 7 is received depending on the state of the latter, or the time intervals corresponding to the time of the closed state of the breaker contacts or the duration of the ignition pulses. Since the first input of the meter 6 receives time intervals equal to the duration of the engine operating cycle, the measurement result of the above values is recorded in units of the angle of rotation of the engine crankshaft. In this case, if the pulse at the output of block 5 is absent, the measurement result is average over a multitude of cylinders. If there is a pulse at the output of block 5, the measurement result characterizes the quality of operation of the cylinder under study selected by block 5. In the pulse counting mode, the G gauge evaluates the condition of the coil and the system capacitor, or evaluates the state of the cam J), In the first case, the meter 6 counts the number of pulses is negative, and in the second - the positive polarity in the secondary circuit of the ignition system, exceeding a predetermined level for a fixed number of engine cycles. The above pulses generated by the former 3 are fed through the selector 7 to the second input of the meter 6. The counting continues until the first input of the meter 6 does not receive a fixed number of pulses from the engine’s output cycle 4. Thus, measuring unit measuring the ratio of time intervals allows you to measure the parameters of the ignition system, represented as the ratio of the duration of the various phases of the ignition system to the duration of the engine cycle and

It provides dp parameters and parameters for obtaining measurement results in units of the angle of rotation of the engine crankshaft and independence from the engine speed, which expands the functionality of the analyzer.

Claims (2)

1. US Patent No. 3.597.677, 324-17 1971 2. USSR USSR No. 363262, QOlL 23/08, 12/20/1972