SU1348696A1 - Device for testing internal combustion engine shaft for irregularity of rotation - Google Patents

Abstract

The invention relates to electronic devices for testing and technical diagnostics and allows to simplify the monitoring of the determination of non-uniformity. The device contains a rotation frequency sensor 1, drivers 2 and 3, counter 4, registers 5,6 and 7, comparison elements 8.9, pulse generator 10, calculator II, indicator 12, elements 13 and 14. When the shaft rotates, sensor 1 is activated The signals from which pass through the circuit elements, and as a result, register 6 contains the maximum of the sequence of AI codes corresponding to these signals, while the latter corresponds to the maximum time equivalent of turning the shaft through a known discrete angle. Register 7 contains the code A pin corresponding to the minimum time equivalent of turning the shaft through a known discrete angle. These codes are permanently present at the outputs of the calculator 11, which calculates the actual value of the rotational unevenness using a certain formula. 1 il. with (L

Description

ten

The invention relates to electronic devices for testing and technical diagnostics of internal combustion engines.

The aim of the invention is to simplify the control process.

The drawing shows a functional diagram of the device.

The device contains a rotational speed sensor 1, the first and second formers 2 and 3, the counter 4, the first second and third registers 5,6 and 7, the first and second elements 8 and 9 of the comparison, the generator 10 pulses, calculate the angle that corresponds to mini - castle 11, indicator 12, first and lowest rotational speed. The third second elements And 13 and 14. Register 7 is designed for storage

A rotational speed sensor 1 through a code equivalent to the turnaround time and the first driver 2 is connected to the shaft at a certain angle, to which the synchronization input of the first regi-2o corresponds to the maximum frequency

speed sensor 1 in amplitude and front. The second shaper 3 generates a single pulse corresponding to the trailing edge of the pulse from the shaper 2. Counter 4 is pre-calculated to form the equivalent of the shaft turning time at a certain angle. The first register 5 is designed to store a code equivalent to the time of shaft rotation at a certain angle. The second register 6 is designed to store a code equivalent to the time of shaft rotation on a certain

country 5 and the input of the second shaper 3, the output of which is connected to the zeroing input of the counter 4 and the first inputs of the first and second elements And 13, 14, respectively. The output of the pulse generator 10 is connected to the counting input of counter 4, the forward information output of which is connected to the information input of the first register 5. The forward information output of the first register 5 is connected to the information inputs of the second and third registers 6 and 7, respectively, and to the first inputs of the first and the second elements 8 and 9 of the comparison. The forward information output of the second register 6 is connected to the first input of the calculator 1 1 and the second input of the first comparison element 8. The forward information output of the third register 7 is connected to Q to the second input of the calculator 11 and to the second input of the second comparison element 9. The outputs of the first and second elements 8 and 9 of the comparison are connected to the second inputs of the first and second elevations. The first comparison element 8 is designed to compare the equivalent time code of the measured rotation frequency with the time equivalent code.

25 corresponding to the minimum speed. The second comparison element 9 is intended to compare the equivalent time code of the measured rotational speed with the equivalent time code.

30 corresponding to the maximum rotational frequency. The generator 10 is designed to fill the time interval in turn. a shaft of a shaft at a certain angle with stable frequency pulses (i.e. for

 measuring the shaft turning time at a certain angle). Calculator 11

designed to calculate the actual value of rotational unevenness and generate a Reset signal, leading the second register 6 to zero, and the third register 7 to a single state. Indicator 12 is intended to indicate the measurement result. The first element And 13 is intended for 45 permissions to write the code from the output of the first register 5 to the second register 6 in the case when the code at the output of the first register 5 is greater than the code stored in the second register 6. The second element And 14 is intended to record the code from the output of the first register 5 to third register 7 in the case where the code at the output of the first register 5 is less than the code stored in the third register 7. The device operates as follows.

cops And 13, 14 respectively. The outputs of the first and second elements And 13,14 are connected to the synchronization inputs of the second and third registers 6 and 7, respectively. The first output of the calculator 11 is connected to the input of the indicator 12, and the second output to the input of the zero register of the second register 6 and the installation input to the unit state of the third register 7.

Sensor 1 serves to generate an electrical signal through a certain angle of rotation of the shaft. The first driver 2 generates a signal from

0

g is the angle which corresponds to the minimum rotation frequency. The third register 7 is designed to store

speed sensor 1 in amplitude and front. The second shaper 3 generates a single pulse corresponding to the trailing edge of the pulse from the shaper 2. Counter 4 is designed to form the equivalent of the shaft turning time at a certain angle. The first register 5 is designed to store a code equivalent to the time of shaft rotation at a certain angle. The second register 6 is designed to store a code equivalent to the time of shaft rotation on a certain

rotation The first comparison element 8 is intended to compare the equivalent time code of the measured rotational speed with the equivalent time code,

corresponding to the minimum rotation frequency. The second comparison element 9 is designed to compare the equivalent time code of the measured rotational speed with the equivalent time code,

corresponding to the maximum frequency of rotation. The generator 10 is designed to fill the time interval of the shaft rotation at a certain angle with stable frequency pulses (i.e. for

Q

 measuring the shaft turning time at a certain angle). Calculator 11

Q

n

is designed to calculate the actual amount of rotational unevenness and generate a Reset signal, leading the second register 6 to zero, and the third register 7 to one state. Indicator 12 is intended to indicate the measurement result. The first element And 13 is intended for 5 allowing the recording of the code from the output of the first register 5 to the second register 6 in the case when the code at the output of the first register 5 is greater than the code stored in the second register 6. The second element And 14 is intended to record the code from the output of the first register 5 to third register 7 in the case where the code at the output of the first register 5 is less than the code stored in the third register 7. The device operates as follows.

The calculator 11 generates a Reset signal, which zeroed the second register 6 and sets to one

The third register 7 is in a state of operation. The liM-high-frequency pulses from the generator output 10 pulses are continuously fed to the counting input of counter 4. When the motor shaft is rotated, the rotation frequency sensor 1 triggers. The first driver 2 generates from this signal a single short pulse arriving at the clock input of the first register 5. As a result, code A present on the forward information output of counter 4 is written to the first register 5 and is fed

from its direct information output 15 of the first and second elements 8 and 9 to the information inputs of the second and third registers 6.7 and the first inputs of the first and second elements 8.9 comparisons, respectively. Code A is a comparison, respectively. Moreover, if A A, then at the output of the first element 8 of the comparison there appears a force of a unit level, which is

It is a digital equivalent of the time of rotation of the motor shaft at an angle between two adjacent pulses from the rotational speed sensor 1. Since in the initial state the second register 6 is zero, the zero code from its direct information output is present at the second input of the first comparison element 8. As a result, since code A at the first input of the first comparison element 8 is greater than the zero code at the second input of the first comparison element 8, the output of the input code I code input 2 of the first comparison element 8 is the signal of the unit level, which is fed to the second input of the first of the element 13. As in the initial state in the third register 7 the unit code is written, the unit code is

20 is fed to the second input of the first element And 13. At the output of the second element 9 of the comparison, there is no unit level (since A A). On the trailing edge of the pulse from the output of the first

25 of the former 2 of the second formate 3 generates a short unit impulse that zeroes the counter 4 and writes code A into the second register 6, since a unit level signal is present at the second input of the first element And 13. In this case, code A is not recorded in the third register 7, because the second input of the second element And 14 contains a zero level signal. If A, then code A is recorded in the third register 7, and there is no entry in the second register 6. Upon further rotation of the shaft, the sensor triggers again for 1 hour.

thirty

35

its direct information output is 40 Ra dsni, and the operation of the device

There is also at the second input of the second comparison element 9. As a result, since the code A at the first input of the second comparison element 9 is less than the single code at the second input of the second comparison element 9, then at the output of the Input 1 code the input 2 of the second comparison element 9 appears a single pulse that enters the input of the second And 14 element At the trailing edge of the pulse from the output of the first shaper 2, the second shaper 3 generates a short pulse that zeroed the counter 4, and since the second inputs of the first and second elements 13,14 contain signals of a unit level, their clock inputs to the second and third registers

6.7 and writes code A into them. Upon further rotation of the shaft, the rotational speed sensor 1 is activated again. The shaper 2 generates a single short pulse, which arrives at the synchronization input of the first register 5 and records the code A formed in the first register 5 in the counter 4. At the same time, the code A recorded in the first register 5 comes from its direct information input to the information inputs of the second and third registers 6.7. and at the first entrances

first and second elements 8 and 9

Comparison, respectively. Moreover, if A A, then at the output of the first comparison element 8 a single level signal appears, which is fed to the second input of the first element And 13. There is no single level signal at the output of the second comparison element 9 (since A A). On the trailing edge of the pulse from the output of the first

driver 2, the second driver 3 generates a short unit pulse, which zeroes the counter 4 and writes code A to the second register 6, since the unit level signal is present at the second input of the first element And 13. In this case, the code A is not recorded in the third register 7, since the second input of the second element I 14 contains a zero level signal. If A, A, then code A is recorded in the third register 7, and in the second register 6 there is no record. Upon further rotation of the shaft, the sensor triggers again for 1 hour.

po & t.

So in the second register

6 is the maximum of the sequence of codes A; CODE A ang: t which corresponds to the maximum time equivalent of shaft rotation to a known discrete (between two adjacent pulses from sensor 1) angle, which corresponds to the minimum rotation frequency. In the third register

7 is the minimum of the AJ code sequence, H, which corresponds to the minimum time equivalent of shaft rotation at a known discrete angle, which corresponds to the maximum rotation frequency. Codes A

Max

And A.

permanently

present at the inputs of the calculator 11, made, for example, in the form

51348696

tronika-60, which is a positive non-rotation value according to

- W.

+ W „

2,

so what are you doing with

Where

W.

S is the value of non-uniform rotation;

, Is the minimum speed of rotation;

maximum rotation speed.

Speed values are determined from the ratio

W,

WQKC

H

W to

rotation speed;

the value of a known discrete angle; generator period;

number of pulses counted by counter 4,

Further, the information from the output of the calculator enters the indicator 12,

The device allows operational

measure the actual value of the displacement of the third register connected to

rotational numbering, capable of, except:;:} the actual value of the rotational unevenness, measure the actual value of the minimum and maximum rotational speeds,

Claims (1)

Invention Formula A device for monitoring the uneven rotation of the shaft of an internal combustion engine, containing a rotational speed sensor, first and second formers, a counter, first and second comparison elements and an indicator Compiler V.Gorbunov Editor I.Rybchenko Tehred L.Oliynyk Proofreader M.Maksiminets 5182/42 Circulation 775 Subscription VNIMSH State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 A torus, wherein, through the first driver, the rotational speed sensor is connected to the input of the second driver, the output of which is connected to the zeroing input of the counter, which, in order to simplify the monitoring process, the device additionally contains first, second and third registers, a pulse generator, the transmitter and the first and second elements And, and the output of the first driver connected to the sync input of the first register, the output of the second the driver is connected to the first inputs of the first and second elements, And the output of the pulse generator is connected to the counter input of the counter, the direct information output of which is connected to the information input of the first register, the direct information output of which is connected to the information inputs of the second and third registers and to the first inputs of the first and second comparison elements, the direct information output of the second register is connected to the first input of the calculator and to the second input of the first comparison element, the direct information output 0 the second input of the calculator and the second input of the second comparison element, the outputs of the first and second comparison elements are connected to the second inputs of the first and second elements AND, respectively, 1O, the outputs of the first and second elements, AND are connected to the synchronization inputs of the second and third registers, respectively, the first output of the calculator is connected to the input of the indicator, and the second to the input of zeroing the BTopoi o register and the installation input into the unit state of the third register.