SU1173055A1 - Arrangement for determining starting angle of fuel delivery into combustion engine cylinder - Google Patents

Abstract

A DEVICE FOR THE DETERMINATION OF THE BOILER OF THE BEGINNING OF SUPPLY OF FUEL IN THE CYLINDER OF THE INTERNAL COMBUSTION ENGINE, p. holding fixed point sensors and signals under investigation, first amplifier driver, first and second counters, pulse counter, comparison circuits, switch switches, output pulse drivers, mixer, cathode oscilloscope, first AND circuit, OR circuit, first trigger, stable pulse generator , divider, first and second memory devices, equivalence scheme, census signal generator, first and second zero meter setting signal generators and display device, the generator The stable pulse torus is connected to a mixer through a parallel first chain containing a serially connected divider, a first AND circuit, a first counter, a first storage device and an equivalence circuit to which a second counter is connected, and a second chain containing a second counter connected in series, an OR circuit and a second the zero setpoint driver, while the fixed point sensor is connected to the first trigger through the first driver amplifier, which is connected in parallel with the first trigger And the coding and signaling circuit connected through the first zero meter setting driver to the first counter and OR circuit, and through the first trigger to the pulse counter, the input of the first zero meter zero generator is connected in parallel with the first and second memory devices, The iS pulse counter output is connected to a second storage device (L and to parallel chains, each of which contains a series-connected switch-switch, a comparison circuit, and a driver dnyh pulses and outputs ,. I chains are connected in parallel with an oscilloscope synchronization input and a mixer connected with the sensor of the 00 signals under investigation and with an oscilloscope, which is characterized by the fact that, in order to increase the accuracy of the SP, a second amplifier, second circuit, And the second trigger, are inserted into the device, a third memory, a dividing circuit, a multiplication circuit, and an account control circuit, wherein the sensor output of the signal under investigation is connected in parallel with a second amplifier-shaper, which is sequentially connected with a second circuit And And the third storage device, one of the inputs of the second trigger is connected with the output of the output pulse shaper parallel to the syncro input

Description

oscilloscope, the second input with the output of the second circuit AND, and the code of the second trigger connected with the input of the second circuit AND, the output of the second storage device connected with the input of the division circuit, the input of the third storage device connected with the input

the second storage device, and the output with the multiplication circuit, which is connected in parallel with the input of the display device and with the account control circuit connected with. dividing circuit and with the first amplifier-shaper. . ,

  one ,

The invention relates to the measurement and technical diagnostics of internal combustion engines and can be used to determine the angle at which fuel starts to enter the cylinder of an internal combustion or ignition engine.

The purpose of the invention is to improve the measurement accuracy.

Fig. 1 shows a block diagram of the proposed device for determining the angles of the beginning of the supply of fuel to the cylinder of an internal combustion engine; in fig. 2 - pulses of the generator of stable pulses; in fig. 3 - pulses passing from the divider to the first counter. ;

The device contains a sensor 1 fixed point, for example, the upper dead point (TDC) of one of the pistons, the first amplifier-driver 2, the first trigger 3, the generator 4 stable pulses. Divider 5, first circuit AND 6, driver 7 of the census signal, first driver for setting zero counters, first counter 9, first memory 10, equivalence circuit 11 second counter 12, OR circuit 13, second driver 14 for setting zero second counter, second memory 15, a pulse counter 16, a mixer 17, a sensor 18 of the signals under study, a third storage device 19, a switch switch 20, a cathode oscilloscope .21, a second amplifier-driver 22, an account control circuit 23, a dividing circuit 24, a y circuit 23 multiplications schemes

26 matches, the second circuit AND 27, the display device 28, the pulse shaper 29, the second trigger 30,

The device works as follows.

Sensor 1 fixed point connected to amplifier-driver

2, with which the standard impulse supplied to the input of the trigger 3 is formed, and sets it to a position in which the signal c, its output prevents the impulse from the divider 5 from passing through the first circuit, And 6, When the trigger position

3, which prohibits the passage of the signal through the first scheme AND 6 from the generator 7 of the census signal, the resolution to the census enters the first memory device 10 on the first counter 9 and the number from the counter 16 pulses in the second memory 15. After that shaper signal

An 8-set zero counter is recorded in the first counter 9 and through the scheme OR 13 - yo the second counter 12 as well as in the counter 16 pulses of the number zero. The trigger 3 is set to the position at which the signal is allowed to pass through the first AND 6 circuit. At the same time, the signals from the generator 4 are stable pulses through the divider 5 frequency of the generator 4 stable pulses with a frequency equal to the frequency of the generator 4 stable pulses divided by the division factor of the divider 5, the oscillator frequencies are fed through the first circuit AND 6 to the counting input of the first counter 9 and summed in it for the period between pulses from the sensor 1 of a fixed point. At each subsequent signal from the sensor 1 is fixed th point sum of pulses stored in the first counter 9 is rewritten in the first storage device 10,

and then in the first counter

9 writes the number zero. The input of the second counter 12 receives signals from the output of the generator 4 stable pulses and when the numbers rewritten in the first storage device 10 coincide and the second counter D2 at the output of the equivalence circuit 11 a pulse appears that goes to the inputs of the counter 16 pulses of the mixer 17 and the former generator 14 the zero of the second counter, the signal from the output of which, through the scheme OR 13, records in the second counter 12 the number zero. During the period between the two signals from the fixed point sensor 1, the sum in the first storage device 10 and in the second counter 12 will coincide n times, and the output of the equivalence circuit 11 at regular intervals n times sends signals that are equal to the input of the counter is 16 pulses and a mixer 17. With a stable engine speed of the internal combustion engine, the number n is equal to the division factor of divider 5, and with unstable engine speeds, the internal combustion engine is greater or less. When the sum of the signals in the counter of 16 pulses coincides with the number dialed on the commutators by switching bodies 20, the outputs of the circuit 26 of the coincidence 26 appear signals whose duration is equal to the duration between two adjacent signals supplied to the counter input of the counter 16 pulses from the output of circuit 11 equivalence. These signals arrive at the input: the pulse generator 29 is converted into them into pulses of the required duration and amplitude and fed to the mixer 17, to the synchronization input of the oscillograph 21 and to the input of the second trigger 30, which is supplied by the output signal for the passage of the signal from the amplifier-maker 22 through the second circuit AND 27 to the input of the census resolution to the third storage device 19. The signal from the sensor 18 of the signals under study, transformed into the required form in the amplifier 22, The post goes to the census resolution input of the third storage device 19 and rewrites the number accumulated in the counter 16 pulses per period from the signal from the fixed point sensor to the moment when the signal from the sensor 18 of the signals under study appears. The signal from the second circuit AND 27, the second trigger 30, is set to a position in which the signal from its output prohibits the passage of signals through the second circuit AND 27. Thus, the second circuit AND 27- passes the signal only when the second trigger resolution is 30, and random interference; before or after the signal, the census input of the third storage device 19 will not pass. In the second storage device 13, a signal from the generator 7 of the census signal records the number accumulated in the counter 16 pulses between the two signals from the fixed-point sensor 1. From the output of the storage device 15, the signals arrive at dividing circuit 24 and by dividing the number stored in the second storage device 15, the cost of dividing in degrees between two adjacent pulses from the equivalence circuit 11 is determined. The multiplication circuit 25 receives the number stored in the third storage device 19, which is multiplied with the number received from the division circuit 24 into the multiplication circuit 25. The result enters the display circuit 28. The counting control is led by the count control circuit 23, which receives the signal to start operation with the amplifier-former 2. The proposed device makes it possible to improve the accuracy of determining the starting angle of the fuel supply in the cylinder number of the internal combustion engine.

fpus, 2

hsh. to d.

fig.Z

Claims (1)

DEVICE FOR DETERMINING ANGLE OF THE BEGINNING OF FUEL SUPPLY TO THE INTERNAL COMBUSTION ENGINE CYLINDER, containing fixed-point and studied signal sensors, the first driver-shaper, the first and second counters, the pulse counter, comparison circuits, switch switchers, pulse oscillators, output oscillators first AND circuit, OR circuit, first trigger, stable pulse generator, divider, first and second storage devices, equivalence circuit, census signal shaper, first and w a shaper of signals for setting the counters to zero and an indication device, the stable pulse generator being connected to the mixer through a parallel first chain containing a series-connected divider, a first AND circuit, a first counter, a first storage device and an equivalence circuit to which a second counter is connected, and a second chain containing a second counter, an OR circuit, and a second zero-signal shaper, connected in series, the fixed-point sensor through the first amplifier the shaper is connected to the input of the first trigger, which is connected in parallel with the first circuit AND and the generator of the census signal, connected through the first shaper of zeroing counters with the first counter and the OR circuit, and through the first trigger with the pulse counter, the input of the first shaper the zero of the counters is connected in parallel with the first and second memory devices, the output of the pulse counter is connected to the second memory, device and to parallel circuits, each of which contains sequentially o connected switch-to-switch, a comparison circuit and an output pulse shaper, and outputs, circuits; connected in parallel with the synchronization input of the oscilloscope and a mixer associated with the sensor of the studied signals and with the oscilloscope, characterized in that, in order to increase accuracy, the device is additionally introduced the second amplifier driver, the second AND circuit, the second trigger, the third storage device, the division circuit, the multiplication circuit A and the count control circuit, the output of the probe of the signal under investigation. connected in parallel with the second amplifier-driver, which is connected in series with the second circuit AND and the third storage device, one of the inputs of the second trigger is connected to the output of the driver of the output pulses in parallel with the sync input SI 1173055, the second input with the output of the second circuit And, and the output of the second trigger is connected to the input of the second circuit And, the output of the second storage device is connected to the input of the division circuit, the input of the third storage device is connected to the input of the second storage device, and the output is connected to the circuit multiplication, which is in parallel connected with the input of the display device and with the account management circuitry connected. division circuit and with the first amplifier-shaper.