SU1474502A1 - Device for determining irregularities of internal combustion engine cylinder operation - Google Patents

Abstract

The invention makes it possible to improve the accuracy of determining the non-uniformity. The outputs of the sensors 1 and 2 of the angular elevations and engine cycles through the amplifiers 3 and 4 are connected respectively to the first inputs of the circuit AND 5 and the circuit OR 6, the output of which is connected to the second input of the circuit 5. The output of circuit 5 is connected to the RS S-INPUT -Trigger (T) 7 and input T 8, and the output is connected to the second input of circuit 6. Direct output T 8 is connected to the first input of circuit AND 9, input T 10, the first control input (SW) of the distributor 11 pulses, and through the one-shot 12 - with the input of the differentiating unit 13 and with the first input of the collector 14. The inverse output (TL) T 8 is connected to the second HC p the distributor 11 and the first inputs of the circuits 15,16 and connected through the one-shot 17 to the input of the differentiating unit 18 and the first input of the selector 19. The output of the torsional vibration sensor 20 via a controlled pulse generator 21 is connected to the second inputs of the circuits 9 and 15. the output T 10 is connected to the third HC of the distributor 11 and the input of T 22, and the IV T 10 is connected to the fourth HC of the distributor 11 and the second input of the circuit 16. The IV T 22 is connected to the fifth UV of the distributor 11, and its direct output is connected to input T 23, the sixth HC of the distributor 11 and the third input of the circuit 16. Direct output T 23 under Switched to the seventh HC of the distributor 11, and its IW is connected to the eighth HC of the distributor 11 and the fourth input of the circuit 16, the output of which is connected to the R-IN of T 7 and the first inputs of the OR 24 and 25 circuits, the second inputs of which are connected to the outputs of blocks 13 and 18 respectively. The outputs of circuit 9 and 15 are connected via counters 26 and 27 to the second inputs of the selector 19 and the collector 14, respectively. The installation inputs of the counters 26 and 27 are connected to the outputs of the circuits 24 and 25. The outputs of the collector 14 and the selector 19 through the comparison circuit 28 are connected to the input of the distributor 11, the outputs of which through the memory block 29 are connected to the registration block 30. 1 il.

Description

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the distributor 11 pulses, and through the one-shot 12 - with the input of the differentiating unit 13 and with the first input of the collector 14. The inverse output (TL) T 8 is connected to the second HC of the distributor 11 and to the first inputs of the And 15, 16 circuits and through the one-shot

17 with input of the differentiating block

18 and the first input of the selector 19 The output of the sensor 20 torsional vibrations through a controlled generator of 21 pulses is connected to the second inputs of circuits 9 and 15. The direct output T 10 cw 1 is occupied with the third shock absorber 11

and an input T 22, and an IW T 10 are connected to the fourth HC of the distributor 11 and to the second input of the circuit 16. The IV of the T 22 is connected to the fifth HC of the distributor 11, and its direct output is connected to the input of T 23, the sixth HC of the distributor 11

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The invention relates to testing internal combustion engines (ICE), in particular to devices for assessing the technical condition of engines, and can be used to determine the non-uniformity of operation of individual ICE cylinders.

The purpose of the invention is to improve the accuracy of assessing the non-uniformity of operation of individual cylinders of an internal combustion engine.

The drawing shows a diagram of the device

The device contains angle sensors

output marks 1 and engine 2 cycles, the outputs of which through the first 3 and second 4 amplifiers are connected respectively to the first inputs of the first AND 5 circuit and the first OR circuit 6, the output of which is connected to the second input of the AND circuit 5 and the output of the latter is associated with The S input of the RS flip-flop 7 and the input of the first flip-flop 8. The output of the RS flip-flop is connected to the second input of the circuit OR 60 The forward output of the trigger 8 is connected to the first input of the second circuit AND 9, the input of the second trigger 10, the first control input of the distributor 11 pulses, and through the first one-oscillator 12 - with the input of the first diff and with the first input of the collector 14. The inverse output of the three to the third input of the circuit 16. The direct output of T 23 is connected to the seventh HC of the distributor 11, and its IW is connected to the eighth HC of the distributor 11 and the fourth input of the circuit 16, the output of which is connected to R-input T 7 and the first inputs of the circuits OR 24 and 25, the second inputs of which are connected to the outputs of blocks 13 and 18, respectively. The outputs of circuits 9 and 15 through counters 26 and 27 are connected to the second inputs of the selector 19 and the collector 14, respectively. The installation inputs of the counters 26 and 27 are connected to the outputs of the circuits 24 and 25. The outputs of the collector 14 and the selector 19 through the comparison circuit 28 are connected to the input of the distributor 11, the outputs of which through the memory block 29 are connected to the registration block 30. 1 il.

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Hera 8 is connected to the second control input of the distributor 11 and the first inputs of the third 15 and fourth 16 And circuits and is connected through the second one-shot 17 to the input of the second differentiating unit 18 and the first input of the second selector 19.

The output of the torsional vibration sensor 20 is controlled by a controlled generator 21. The pulses are connected to the second inputs of circuits 9 and 15. The direct output of the trigger 10 is connected to the third control input of the distributor 11 and the input of the third trigger 22, and the inverse output of the trigger 10 is connected to the fourth control input of the distributor 11 and the second input of the circuit 16

The inverse output of the trigger 22 is connected to the fifth control input of the distributor 11, and its direct output is connected to the input of the fourth trigger 23, the sixth control input of the distributor 11 and the third input of the AND 16 circuit.

The direct output of trigger 23 is connected to the seventh control input.

the distributor 11, and its inverse output is connected with the eighth control input of the distributor 11 and the fourth input of the circuit AND 16, the output of which is connected to the R input of the trigger 7 and the first inputs of the second 24 and third 25 circuits

OR, the second inputs of which are connected to the outputs of blocks 13 and 18, respectively. The outputs of the circuits And 9 and 15 through the first 26 and second 27 counters are connected to the second inputs of the selectors 19 and 14, respectively. The installation inputs of the counters 26 and 27 are connected to the outputs of the OR circuits 24 and 25. The outputs of the selectors 14 and 19 are connected through the comparison circuit 28 to the input of the distributor 11, the outputs of which through the memory block 29 are connected to the registration block 30

The device works as follows.

Before starting the measurement, the piston of one of the cylinders, for example, the first one, is set to the position corresponding to its top dead center. In this position, the sensor of 2 cycles is aligned with the mark attached to the engine camshaft, and one of the corner marks is aligned, the number of which is equal to the number of cylinders engine with sensor 1 corner marks.

The measurements are carried out on the steady-state operation of the engine at the nominal frequency of rotation of its shaft with the coincidence of the pulse from the sensor 1 of the angular marks with the signal from the sensor 2 cycles of operation of the engine. At the output of circuit 5, a pulse appears that puts the RS flip-flop 7 into one state at its direct output. This ensures the fixation of the moments of the occurrence of subsequent signals from the sensor 1 of the angular marks, since one of the inputs of the first circuit OR 6 has a signal that permits the passage of pulses from the sensor, 1 to the input of the first trigger 8. 22 and 23 to a state where a single potential appears at their direct outputs. This opens the third circuit AND 9 and the counter 26 begins measuring the time interval between the occurrences of the first and second pulses from the output of the sensor 1 of the angular marks

The measurement is carried out with a variable time scale, since the pulse frequency from the output of the controlled pulse generator 21 is determined by the voltage at its input, i.e. depends on the current value of the torsional value

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oscillations measured by the sensor 20 torsional vibrations. This eliminates the influence of torsional vibrations on the process of measuring the time between corner marks. The arrival of the second pulse from the output of sensor 1 changes the state of the first trigger 8t at this time, a unit potential appears, its inverse output

The counting of the number of pulses from the output of the controlled generator 14 of pulses in the counter 26 ends, the fourth circuit AND 15 opens, and the counter 27 begins the determination of the time interval between the second and third pulses from the output of sensor 1. Simultaneously, the second one-shot 17 begins at its output is the signal including the first selector 19 and in the comparison circuit 28 the comparison of the number recorded in the first counter 26 with the boundary values begins. If the number recorded in the counter 26 is within the specified range, then the signal from the output of the comparison circuit 28 to the input of the distributor 11 pulses does not pass. Otherwise, the output of the comparison circuit 28 is a signal arriving at the input of the distributor 11 pulses. In this case, the combination of signals at the control inputs of the pulse distributor 11, determined by the state of the flip-flops 8, 10, 22 and 23, ensures that information is stored in memory 29, namely, in the memory cell corresponding to the first cylinder, and registration to overwrite information on any media. After the time required for retrieving information, the signal at the output of the second one-shot is taken, and the second differentiating unit, on the falling edge of the pulse from the output of the second one-shot through the second circuit OR 24, resets the values of the first counter 26.

With the arrival of the third pulse from the output of sensor 1, a single potential is developed at the direct output of the first trigger 8 with a counting input. This opens the third AND 9 circuit, the first counter 26 starts determining the length of time between the third and fourth pulses from the sensor 1 output, and the counting of the number of pulses in the second counter 27 is stopped. The first one-shot is started, 12

the second selector 14 is opened and the number recorded in the second counter 27 is compared in comparison circuit 28 with boundary values. If the number recorded in the counter 27 is not within the specified range, then the output of the comparison circuit 28 is a signal arriving at the input of the pulse distributor 11 and then to the memory block 29, namely the memory cell corresponding to the second order of the engine to the cylinder. At the same time, the registration block 30 is turned on. The pulse distributor 11 passes the signal to the cell of the block corresponding to the combination of signals at its control inputs. After the time required for retrieving information, the signal at the output of the first one-shot is removed and the first differentiating unit at a given front of the pulse from the output of the first one-shot through the third circuit OR 25 resets the readings of the second counter 27.

With the arrival of the fourth pulse, the definition of the quality of operation of the fourth engine cylinder in order begins, and the measurement results are displayed on the third cylinder of the engine. The process of obtaining and processing information ends after the determination of the technical condition of all cylinders. With the arrival of the last for one revolution of the pulse from sensor 2, a single potential appears at the output of the second And 16 circuit. In this case, the readings of both counters 26 and 27 are reset, and the RS flip-flop 7 is transferred to the zero state, at which the first OR 6 circuit closes and the measurement of the duration of the time intervals between the corner marks stops. The next measurement cycle starts only after the pulses coincide with the outputs of sensors 1 and 2 in the first And 5 circuit.

Claims (1)

Invention Formula A device for detecting uneven operation of cylinders of an internal combustion engine, comprising sensors of angular marks and engine cycles, the outputs of which are connected to the inputs of the first and second amplifiers, a pulse generator, the first and second counters of the comparison circuit, memory block 0 0 five TI and registration unit, characterized in that, in order to improve the accuracy of determining the amount of unevenness of the engine cylinders, the device is additionally equipped with a torsional vibration sensor, the first, second and third OR circuit with two inputs, the first, second and third circuits AND with two inputs, the fourth circuit And with four inputs, the RS trigger, the first, second, third and fourth triggers, the first and second one-oscillators, the first 5 and the second differentiating blocks, the first and second selectors with two inputs and a pulse distributor, made with information and eight control inputs, the generator is made with control inputs, the outputs of the first and second amplifiers are connected respectively to the first inputs of the first And and first the OR circuit, the output of which is connected to the second input of the first AND circuit, and the output of the latter is connected to the S-input, the RS flip-flop and the input of the first trigger, the RS-flip-flop output is connected to the second input of the first OR circuit, the direct output of the first the first trigger is connected with the first input of the second circuit AND, the input of the second trigger, the first control input of the pulse distributor, and through the first one-vibrator - with the input of the first differentiating unit and the first input of the first selector, the inverse output of the first trigger switch pulses, the first inputs of the third and fourth circuits And and connected through the second one-shot with the input of the second differentiating unit and the first input of the second selector, the output of the torsional vibration sensor is connected to control The generator's input, the output of which is connected to the second inputs of the second and third circuits, and the direct output of the second trigger, is connected to the third control input of the distributor and the input of the third trigger, the inverse output of the second trigger connected to the fourth control input of the distributor and the second input to the fourth And circuit, the inverse output of the third trigger is connected to the fifth control input of the distributor, and its direct output is connected to the third input of the fourth And circuit, the sixth control input of the distributor and 0 five 0 five 0 7 14745028 the fourth trigger input, the first and the third circuits And through the first output of which is connected to the seventh and second counters are connected to the second control input of the distributor, the inputs of the second and first selectors inverse output of the fourth trigger, respectively, and the setup inputs are connected to the eighth control input of the first and the second counter of the distributor and the fourth input to the outputs of the third and second circuits of the fourth circuit AND, the output of which is OR, the outputs of the first and second are connected to the R input of the RS flip-flop and loudspeakers through the comparison circuit, the output inputs of the second and third OR circuits, JQ, are connected to the information input; the distribution inputs of which are connected to the sockets, whose outputs through the block connect the first and second differential circuits to the inputs of the register blocks, respectively, otstyratsii.