CONTROL OF TECHNICAL CONDITION OF HYDRAULIC UNIT OF AUTOMATIC TRANSMISSION
The purpose of the research is to increase the efficiency of monitoring the technical condition of the automatic transmission by reducing the cost of labor to identify its faults. Experimental studies were carried out to collect data in order to form a model of operational reliability of the gearbox. Due to the mismatch of material and technical base of repair workshops using cars imported, experiments on fault finding of automatic transmission gear was carried out using equipment of dealerships of the brand Nissan in Penza and Moscow, and logistical base dealer center of Infiniti in the city of Samara. Since the occurrence of faults and their detection occurs when driving, due to the nature of the studied data, it is advisable to conduct an active experiment. It is possible to determine the faulty condition of the car by analyzing the results of in-depth diagnosis and testing the current parameters during the driving control of the car according to the standard methods of checking the performance of the car, which will lead to the identification of the faulty condition of the gearbox. Item Troubleshooting is possible with the improvement of the algorithm checks of the transmission. Existing algorithms do not allow determining the fault in the car at the lowest cost. Based on the analysis, it is proposed to change the algorithm of diagnosing the automatic transmission of cars. As a result of trial running inspections with the help of the Consult III+ device, measurements were made of the degree of pressing the accelerator pedal, changes in the speed of the car and the speed of the engine crankshaft depending on time, changes in the degree of opening the throttle valve and the pressure in the fuel master of high pressure to identify the faulty state of the hydraulic unit of gearbox.The measurement time of each indicator can not exceed 30 seconds. The existing control system does not allow detecting the failure of the gearbox. Determining a fault when not changing gears in a car requires the development of an algorithm using the feedback form.