SU1095049A1 - Stand for testing vehicle automatic transmission box - Google Patents

Abstract

STAND FOR TESTING AN AUTOMATIC KOYUBKI TRANSMISSION VEHICLES comprising a drive motor, kinematically connected to the input shaft ispytgaaemoy automatic transmission nagruzhatel kinematically coupled to the output, shaft ispyttaemoy automatic transmission, analog electric sensors the rotational speed of the input and output shafts of the test of an automatic transmission, and control system, characterized in that, in order to improve the quality of testing, one of the poles of the same name The rotational speed switches are interconnected, and the control system is equipped with a variable resistor connected to the said poles and to the other pole of one of the analog electric rotation frequency sensors, a three-position polarized relay connected to the iodomotor contact of the variable resistor and to the other pole of the other analog electrical sensor. rotational speed, two relays connected to the current source through the normally open contacts of the three-part polarized relay, the power indicator The first stage in the test & automatic automatic gearbox connected to the current source through the normally open contacts of the first relay, the second stage activation indicator in the tested automatic gearbox connected to the test station (L current point through the serially connected normally closed contacts of both In addition, the third stage activation indicator in the automatic gearbox under test is connected to the current source through the normally open contacts of the second relay.

Description

tPue.f1 and iifptnenne refers to ipaHciiopmoMy ma 111I1i) st (i. Can be used to test the automatic gearbox tr., c (1 or so tools. Known for testing the automatic gearbox of vehicles, holding a drive engine, kinematically connected to the input shaft - the tested automatic transmission, the loader is kinematically connected to the output shaft of the tested automatic transmission, analog electrical sensors of the rotational speed of the input and output shafts of the tested automatic A disadvantage of the known test bench is that it is not possible to automatically fix the gear change points, which reduces the quality of the automatic gearbox tests. The purpose of the invention is to improve the test quality of the automatic gearbox of vehicles. automagic gearbox of vehicles containing a drive engine, kinematically connected with the input shaft of the tested automatic The axle gearbox is kinematically connected to the output shaft of the automatic gearbox under test, the analogue electrical sensors of the rotational speed of the input and output shafts of the automatic gearbox under test, and the control system, one of the same poles of the speed sensors are interconnected, a resistor connected to the said poles and to the other pole of one of the analog electric rotary speed sensors, three A relay connected to the moving contact of the variable resistor and to the other pole of another analog electric rotary speed sensor, two relays connected to the source T8k through the normally open contacts of the three-position polarized relay, the first stage activation indicator in the tested automatic gearbox connected to the source current through the normally open contacts of the first relay, the indicator of the inclusion of the second stage in the tested automatic gearbox connected to to the source of current through serially connected normally closed contacts of both relays, and with the indicator of the inclusion of the third stage in the automatic transmission under test, connected to the current source through the normally open contacts of the second relay. FIG. 1 shows a block diagram of the stand; in fig. 2 is an electrical diagram of the control system. The drive motor 3 and the analog electric 4 speed sensor are kinematically connected to the input shaft 1 of the tested automatic gearbox 2, and the load loader 6 and the analog electric speed sensor 7 are kinematically connected to the output shaft 5 of the tested automatic gearbox 2. Analog electric sensors 4 and 7 are made in the form of tachogenerators, the windings 8 and 9 of which are connected to rectifiers 10 and 11. The negative poles of the rectifiers 10 and 11 are interconnected .... The control system 12 contains a variable resistor 13 connected to negative the poles of the rectifiers 10 and 11 and to the positive pole of the rectifier 10; a three-index polarized relay 14 with normally open contacts 14.1 and 14.2, connected to the moving contact of the variable resistor 13 and to the positive pole of the rectifier 11; two relays 15 and 1.6, with contacts respectively 15.1, 15.2 and 16.1, 16.2, connected to the current source through the normally open contacts 14.1 and 14.2 of the three-position polarized relay 14; the first stage activation indicator 17 in the tested automatic gearbox of 2 gears connected to the current source through normally open contacts 15.Г relay 15; the indicator of the inclusion of the second stage in the tested automatic gearbox 2 gears connected to the current source through a series of normally closed contacts 15.2, 16.2 of both relays 15 and 16 and the indicator of the third stage 19 in the automatic gearbox 2 gears connected to the current source through the normally open contacts 16.1 of the relay 16. The position of the moving contact of the variable resistor 13 is set so that when the second stage is turned on, the test automatic gearbox of 2 gears has a voltage of on the moving contact was equal to the voltage on the positive zero of rectifier 11. The control system also contains a speedometer for visual recording the vehicle speed, a tachometer for visual recording the rotational speed of the input shaft of the automatic gearbox 2 gears and a meter for measuring the transmitted automatic gearbox (not shown). When the drive engine 3 is operated and the frequency of its rotation changes with the help of the loader 6, a different load is set on the output shaft 5 of the automatic gearbox of the 2 gears to be tested. When the first stage is turned on in an automatic gearbox of 2 gears at a given frequency of rotation of the input shaft 1, output shaft 5 will rotate at a minimum angular speed. In this case, the voltage on the positive side of the rectifier 11 will be less than the voltage on the moving contact of the variable resistor 13. As a result, the three-fold polarized relay 14 will work and will connect the relay 15 to the current source with its normally open contacts 14.1. When this is done, contacts 15.1 are closed and contacts 15.2 are open. As a result, the indicator 17 will be connected to the current source and signaling that the first stage is turned on in the automatic gearbox of 2 gears. When increasing the frequency of rotation of the output shaft 5 of the automatic gearbox 2 gears to a predetermined value, the second stage will turn on in the automatic gearbox. At this time, the voltage on the moving contact of the variable resistor 13 is equal to the voltage at the positive pole of the rectifier 11. As a result, a three-point pop {I {my own relay 14 is disconnected from its normal open contacts 14.1 and 14.2 of the power supply of both relays 5 and 16. In this case, the indicators 17 and 19 will be disconnected from the current source, and the indicator 18 through sequentially connected normally closed contacts 15.2 and 16.2 will be connected to the current source and signal the activation of the second stage in the automatic transmission of 2 gears. With a further increase in the frequency of rotation of the output shaft 5 of the automatic transmission to a predetermined value, the third stage will be activated in the automatic transmission of 2 gears. In this case, the voltage at the positive pole of the rectifier 11 will be greater than the voltage on the movable contact of the variable resistor 13. As a result, the three-position polarized relay 14 will re-activate and will open the relay 16 to the current source with its normal open 14.2. At the same time, the contacts are closed 16Л and the contacts 16.2 are open. As a result, indicator 19 will be connected to the current source and signal to activate the third stage in an automatic transmission of 2 gears. Thus, in the proposed stand, a clear automatic fixation of the moments of gear shifting is provided by turning on the corresponding indicator at the moment of gear shifting, which enhances the quality of testing automatic gearboxes.

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Claims (1)

AUTOMATIC TRANSMISSION TEST BENCH, comprising a drive motor kinematically connected to the input shaft of the tested automatic transmission, a loader kinematically connected to the output shaft of the tested automatic transmission, analog electric sensors of the input and output speeds of the tested automatic transmission and the tested automatic transmission shaft control system, characterized in that, in order to improve the quality of tests, one of the same poles of the sensor in rotation speeds are interconnected, and the control system is equipped with a variable resistor connected to the said poles and to the other pole of one of the analog electrical speed sensors, a three-position polarized relay connected to the movable contact of the variable resistor and to another pole of another analog electrical speed sensor , by two relays connected to a current source through normally open contacts of a three-position polarized 'relay, with an indicator for switching on the first step neither in the tested automatic gearbox connected to the current source through the normally open contacts of the first relay, the second stage enable indicator in the tested automatic gearbox connected to the current source through the normally closed contacts of both relays in series, and the power indicator third stage in the tested automatic transmission, connected to the current source through the normally open contacts of the second relay. SU _m , 1095049 Vut.f I095049