SU1326929A1 - Apparatus for monitoring the load of i.c.engine - Google Patents

Abstract

The invention relates to a measurement technique and makes it possible to increase the accuracy of control of the load. The device contains an angular labeling driver 1, an angular velocity converter 2, a rotational frequency meter 3, blocks 4, 5, 11 differentiation, a zero-body 6, a memory block 7, a working zone setpoint 8, a reference block 9, an indicator 10 , analog switch 12, driver 13 pulses of upper dead center (TDC) of the piston of the first: cylinder and sensor 14 TDC. The signal from the output of the converter 2 simultaneously enters the inputs of the meter .3 and block 11. From the meter 3, the signal through blocks 4 and 5 is fed to the input of the zero-body 6. The latter is triggered at the time of optimal loading}: to the engine. The signal input of the key 12 simultaneously receives signals from the block 11 and the driver TDC pulses. The output synnals from the null organ and the key 12 simultaneously arrive at the input of the block 7. The output signal from block 7 is compared with the signal of the setter 8. If it is outside the optimum working area, the indicator 10 is triggered. 1 sludge. i (L S Sue; about L

Description

1326929

This invention relates to a measurement technique and can be used to monitor the operation of an internal combustion engine .g

The purpose of the invention is to improve the accuracy of monitoring engine load under operational conditions.

The drawing shows the block diagram of the proposed device.10

The device contains serially connected angular label imaging unit 1, angular velocity transducer 2, rotational speed meter 3, first differentiation unit 4, 15 second differentiation unit 5, null organ 6, memory unit 7, operating zone setting unit 8, comparison unit 9 and indicator 10, as well as the third differentiation unit 11, an analog switch of 12, a driver of 13 upper dead center pulses (TDC) of the piston of the first cylinder and a sensor 14 of TDC. The input of the differentiation unit 11 is connected to the output of the converter 2 of the angular speed 25 and the input of the meter 3 rotational speeds, and the output to the signal input of the analog switch 12, the control input of which is connected via the TDC pulse generator 13 to the TDC sensor 14. The output of analog k, shock 12 is connected to the second inputs of memory block 7 and comparison block 9.

The device works as follows.

When the engine is running, the signal from the former 1 of the angular marks of the crankshaft of the engine enters the converter 2 of the angular velocity k0. the shaft shaft. Due to the change in the 40 moment of inertia of the engine and the alternation of the plugs in the engine cylinders, the angular velocity is a variable signal in time, even with a constant engine load. 45 The signal from the output of the converter 2 is simultaneously fed to the inputs of the meter 3 rotational speeds and the third block 11 of differentiation. From the output of the meter 3, a signal corresponding to 50 of the motor shaft rotation speed (average angular velocity per cycle of the engine operation) is successively passed through blocks 4 and 5 of the differentiation, the output of which produces a 55 ms signal proportional to the second derivative of the shaft rotation frequency. The indicated signal arrives at the input of the ul-organ 6, which is triggered at the moment that the gr c qi mg re en entry is no longer received from the input transducer.

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the inequality of the zero of this signal, which corresponds to the optimal loading mode of the engine. From the output of the third differentiation unit 11, a signal proportional to the instantaneous value of the angular acceleration is fed to the signal input of the analog switch 12, the control input of which receives a signal from the driver of 13 TDC pulses, generating a pulse when the TDC sensor is detected (TDC sensor is activated). The acceleration signal received at the output of the analog key 12, which corresponds to the moments of the piston in the TDC, arrives at the second input of the memory block 7 and is recorded there when there is a signal at the first input of the memory block 7 coming from the zero-body 6. At the same time, this signal to the second input of block 9 comparison. The value of the acceleration memory registered in block 7 corresponds to the nominal value of the engine torque at the speed characteristic (external or partial) of the engine operation.

Through the setpoint device 8 of the working zone, made in the form of a threshold device for two levels of momentum values corresponding to the upper and lower limits of the optimal load, the signal is fed to the first input of the comparator unit 9, which is compared with the current acceleration value of the crankshaft when the piston is TDC The seed signal carries information about the degree of engine load.

If this value is outside the optimal loading zone, the result of the comparison is applied to the indicator 10 as a signal. The load is below optimal or the load is higher than optimal. In case the acceleration value is within the optimum zone set by the setter B of the working zone, then at the output of block 9 there is no signal.

Claims (1)

Thus, the application of the proposed device provides control of the engine with a large load. reliability, which helps to reduce fuel consumption and improve engine reliability. Invention Formula An apparatus for monitoring engine load of internal combustion, comprising a rotational speed meter, 31326929 to the output of which is a sequencer pulse TDC the first and second blocks of the differential first cylinder and the analog switch are connected, fermentation, null-organ, block pa. and the input of the angular converter m ti, the setpoint of the working area, the speed unit is connected to the driver Comparison and indicator, distinguishing angular labels, and output - with measuring with the fact that, in order to increase the rotational frequency and with the input of the third accuracy of control of its differentiation unit, in operating conditions, the device is connected to the signal input additionally contains a form-10 analog key that controls the input Angle label indicator, the transducer of which is connected via a driver the angular velocity, the third block of differential pulses of TDCs with a TDC sensor, and the output sensor, the sensor of the upper dead traverse, with the second inputs of the memory block points (TDC) of the piston of the first cylinder, and the comparison unit.