Hydraulic oil circuit for reversing control of automatic transmission

Abstract

The invention discloses a hydraulic oil circuit for reversing control of an automatic transmission, belongs to the technical field of automotive transmissions, and solves the technical problems of obvious impact feel, short transmission life, high maintenance and repair costs and poor driving feel of a driver in a shifting process due to over-high oil pressure in a control oil circuit during reversing of an existing automatic transmission automobile. The hydraulic oil circuit is characterized in that the operations of adjusting the pressure and switching the oil circuit are carried out through solenoid valves, and the input main oil pressure is reduced and output to reversing execution elements. The hydraulic oil circuit is simple in structure and reasonable in design; the oil circuit is switched and the main oil pressure is adjusted to be relatively low under the control of the solenoid valves; the oil pressure is controlled to be within a relatively low range under the reversing working condition in a specific situation, and the performance is stable; the use of complicated control programs is avoided and the reversing execution elements need to be improved, so that the part development cost and the control program matching and calibration cost are reduced, the product development cycle is shortened, the product life is prolonged, and the use, maintenance and repair costs are lowered.

Description

technical field [0001] The invention belongs to the technical field of automobile transmission, and in particular relates to a hydraulic oil circuit for reverse gear control of an automatic transmission. Background technique [0002] At present, the shift shock that occurs during the shifting process of automatic transmission vehicles is a major problem that plagues automatic transmissions. Especially in the reverse gear shifting condition, usually the oil pressure in the control oil circuit is too high during the reverse gear, and the shock feeling is obvious during the gear shifting process, which is an extremely bad working condition for the transmission hardware itself, shortening the life of the transmission, The cost of maintenance and repair is increased, and the driving feeling of the driver is also poor. Contents of the invention [0003] The invention solves the technical problems of the existing automatic transmission automobiles, such as the excessive oil pres...

AI Technical Summary

Problems solved by technology

[0003] The invention solves the technical problems of the existing automatic transmission automobiles, such as the excessive oil pressure in the control oil circuit during the reverse gear, the obvious impact feeling in the process of shifting gears, shortening the life of the transmission, increasing maintenance and repair costs, and poor driving experience of the driver; The invention provides a reverse gear control hydraulic oil circuit with simple structure and reasonable design, which can reduce the hydraulic pressure of the shifting gear of the transmission, reduce the impact on the shifting elements, prolong the service life of the transmission, reduce maintenance and repair costs, and improve the shifting quality of the transmission. structure

The first logic valve is the D gear / R gear logic valve

Images