SU1370482A1 - Device for automatic control of bench for testing fuel injection advance angle variation coupling - Google Patents

Abstract

The invention allows to increase the speed, increase the accuracy and simplify the design. The device contains an electric motor 1, a block 2 of a thyristor converter, rotational speed sensors 3, 5 and 6, monitoring the initial angular position of the drive and driven shafts 7 and 8 with appropriate carriers 9 and 10 marks on these shafts, tachometer 4, measuring system, connected with sensors 5 and 6, sensors 11 and 12 of monitoring the angle of lag of shaft 8 from shaft 7 and two corresponding carriers 13 and 14 interacting with them on shaft 8. The measurement system is designed as a program block 15, comparator 16, selector 17, schemes 18, 19 and 20 matches, indicator 21 years of age. When sensors 11 and 12 coincide with the corresponding labels, a control signal is generated, which allows to exclude electronic devices from the circuit. 1 il. with in (L

Description

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The invention relates to engine-building, in particular, to testing of components of internal combustion engines, and can be used to test diesel fuel injection ahead sleeves.

The purpose of the invention is to improve the speed of testing, increase accuracy and simplify the design, which is achieved by automating the process of controlling the bench and determining the angle of lag of one coupling half relative to another direct method for the coincidence of labels with sensors controlling the angular position.

The drawing shows the proposed device.

The device contains a motor I rigidly coupled to a coupling element (not shown) with a thyristor converter unit 2, a rotational frequency sensor 3 connected to the electric motor 1 and a tachometer 4 connected to it, sensors 5 and 6 controlling the initial angular position of the master 7 and the slave, respectively. 8 shafts with corresponding carrier 9 and 10 marks on these shafts and a measurement system; associated with sensors 5 and 6 of monitoring the initial angular position of shafts 7 and 8,

The device is also equipped with the first 11 and second 12 additional sensors for monitoring the lagging angle of the driven shaft 8 from the drive shaft 7 and two corresponding carriers 13 and 14 tags interacting with it on the driven shaft 8. The measuring system is designed as a program block 15, comparator 16, selector 17, the first 18, the second 19, and the third 20 match patterns and the validity indicator 21. In this case, the sensor 5 for monitoring the initial angular position of the drive shaft 7 is connected to the first inputs of the first 18, second 19 and third 20 coincident 1P1 circuits, the second inputs of which are connected respectively to the sensor 6 controlling the initial angular position of the driven shaft 8, the first 1 and second 12 additional control sensors lagging angle, the third inputs of which are connected respectively with the first input of the program block 15, the first and BTopbLM outputs of the selector 17. Perryt, the second, third and fourth inputs of the program block 5 sv-shS, respectively, from the output my first

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18, the second 19 and the third 20 coincidence circuits, as well as the third output of the selector 17. The second, third, fourth and fifth outputs of the program block 15 are connected to the first, second, third and fourth inputs of the comparator 16, respectively, and the sixth output to the input unit 2 of the thyristor converter of the electric motor 1. The fifth, sixth, seventh and eighth inputs of the comparator 16 are connected respectively with the first, second, third and fourth outputs of the tachometer 4, and the first, second and third outputs of the comparator 16 are respectively with the first, second and third entrances with The selectors 17 are associated with their fourth and fifth outputs with a 21-life indicator.

The device works as follows.

Before testing the clutch set the leading 7 and driven 8 shafts of the stand to its original position. For this, 5 at a given frequency of rotation of the electric motor 1, adjust the initial position of the sensor 6 for monitoring the initial angular position of the driven shaft 8 to match its output signal with the signal from the sensor 5 for monitoring the initial angular position of the drive shaft 7 and fixedly fix this position of the sensor 6. At the same time The signals from sensors 5 and 6 are fed to the first coincidence circuit 18, and in the presence of an enabling signal from the program block 15 arriving at the third input of the first comparison circuit 18, a signal is sent from its output to he first input software unit

15, allowing the supply of a master signal from it to the input of block 2 of the thyristor converter. At the same time, the signal from program block 15 is fed to the input of comparator 16, where it is compared with the output signal of tachometer 4. Equality of input signals coming to the comparator

16 indicates that the set and current rotational frequencies of the electric motor coincide, with the result that at the second output of the comparator 16 a signal arrives at the selector 17, which provides permission to measure the angle (x, before 5 or at the first measurement step.

In the process of checking the clutch when the output shaft 8 deviates by о, the output of the first additional

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A sensor 11 appears at the same time as the signal from the sensor L monitoring the angular position of the driven shaft 8 to the inputs of the second coincidence circuit 19, the output of which is a signal permitting measurement of the result, in program block 15 and the input of measured limits the current value of the rotational speed to the comparator 16, where it is compared with the technical value of the rotational speed of the electric motor 1 obtained from the tachometer 4. As a result, the output of the comparator 16 is signals arriving at the input of the selector 17, where o and analyzed If the current value of the rotational speed of the drive is in diaggazone permissible minimum and maximum speed, then the indicator 21 is lighted shelf signal lamp Gaudin and simultaneously programming unit 15 from the output signal of the selector 17 is supplied to the motor 1 to transfer the next speed stages. The second coincidence circuit 19 receives a measurement inhibition signal, and the third coincidence circuit 20, a measurement resolution signal, which is produced while the signals from sensors 5 and 12 simultaneously arrive at the inputs of the third circuit 20, when the rotation frequency reaches the required value and the measurement process repeats . If it is sufficient to measure at one stage, then the test for the second and subsequent stages is not carried out. If, when measuring current, the value of the frequency of rotation of the drive is outside the permissible range of frequencies, then the Krak warning light on the life-time indicator 21 turns on and the clutch rejects.

The proposed device (unlike the known ones) provides an increase in accuracy due to the formation of control signals when the additional angle control sensors coincide with the corresponding marks, which makes it possible to exclude from the circuit electronic devices — pulse width formers and memory devices, and consequently, to simplify the design and reduce costs for the manufacture and adjustment of the stand. Form of invention

Automatic control device for testing the clutch

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changing the fuel injection advance angle, containing a motor with a thyristor converter unit rigidly coupled to the clutch driver, a rotational frequency sensor connected to the motor and a tachometer connected to it, sensors for controlling the initial angular position of the drive and driven shafts with the appropriate marking carriers on these shafts and a measurement system associated with sensors controlling the initial angular position of the shafts, which is 14 e e in order to improve speed, increase accuracy and Forgiveness of the design, the device is equipped with the first and second additional sensors for monitoring the angle of the output shaft from the drive and two interacting corresponding markers on the driven shaft, and the measurement system is made in the form of a multiple unit, comparator, selector, first, second and second the third coincidence circuit and a validity indicator, the sensor monitoring the initial angular position of the drive shaft connected to the first inputs of the first, second and third coincidence circuits, the second inputs of which are connected according to with the sensor controlling the initial angular position of the driven shaft, the first and second additional sensors controlling the angle

delays and the third inputs of which are connected respectively with the first output of the program block, the first and second outputs of the selector, the first, second, third and fourth inputs of the program block are associated respectively with the outputs of the first, second and third match circuits, as well as the third output of the selector The second, third, fourth, and fifth outputs of the program block are connected to the first, second, third, and fourth inputs of the comparator, respectively, and its sixth output is connected to the input of the thyristor converter of the electric motor, the fifth, The sixth, seventh, and fold inputs of the comparator are associated with the first, second, third, and fourth outputs of the tachometer, respectively, and the first, second, and third outputs of the comparator are respectively with the first, second, and third inputs of the selector associated with their fourth and fifth outputs. with the indicator.

Claims (1)

SUMMARY OF THE INVENTION A device for automatically controlling a bench for testing a coupling for changing the fuel injection advance angle, comprising an electric motor rigidly connected to a clutch driving element and a thyristor converter unit, a rotational speed sensor connected to an electric motor and a tachometer connected to it, sensors for controlling the initial angular position 10 of the drive and driven shafts with appropriate label carriers on these shafts and a measurement system associated with sensors for monitoring the initial angular position of the shafts, It is noteworthy that, in order to improve performance, increase accuracy and simplify the design, the device is equipped with first and second additional sensors for monitoring the angle of 2Q of the lag of the driven shaft from the driving shaft and two corresponding mark carriers on the driven shaft and the measurement system is made in the form of a program unit, 25 comparator, selector, first, second and third coincidence circuits and an expiration indicator, and the sensor for controlling the initial angular position of the drive shaft is connected to the first 30 inputs of the first, second and third coincidence circuits, the second inputs of which are connected respectively to the sensor for monitoring the initial angular position of the driven shaft, the first and second additional sensors for monitoring the angle of backward ez, and the third inputs of which are connected respectively with the first output of the program unit, the first and second outputs selector, the first, second, third, fourth inputs of the program unit are connected respectively with the outputs of the first, second and third matching circuits, as well as with the third output of the selector, second, third , the fourth and fifth outputs of the program unit are connected respectively to the first, second, third and fourth inputs of the comparator, and its sixth output is connected to the input of the block of the thyristor converter of the electric motor, the fifth, sixth, seventh and eighth inputs of the comparator are connected respectively to the first, second, third and the fourth outputs of the tachometer, and the first, second, and third outputs of the comparator, respectively, with the first, second, and third inputs of the selector associated with its fourth and fifth outputs with an indicator of suitability.