Two-gear automatic transmission hydraulic valve plate for pure electric automobile

Abstract

The invention relates to a two-gear automatic transmission hydraulic valve plate for a pure electric automobile. The valve plate is of a one-piece structure and can be divided into two parts which are used for bearing a system component for oil pressure regulating and flow control in a hydraulic system and a system component for gear shifting control of a clutch, and the one-piece structure is integrated in the mode that space oil ways are constructed and are externally sealed. The oil ways, a throttling hole, all hydraulic valve seats and the like in the valve plate are all formed by punching holes in the valve plate. The direction of hydraulic oil is controlled only by the space position and the connection relation of oil ways in the valve plates. According to the two-gear automatic transmission hydraulic valve plate for the pure electric automobile, the one-piece valve plate is adopted, the leakage rate is small, the pressure loss is small, so that the response precision of press is improved.

Description

technical field [0001] The invention relates to a vehicle hydraulic control system, in particular to a hydraulic valve plate of a two-speed automatic transmission of a pure electric vehicle, belonging to the technical field of hydraulic transmission. Background technique [0002] Automatic transmission is an important part of automobile powertrain, and its actuators are mostly driven by hydraulic system. Therefore, the performance of the hydraulic system is a direct factor affecting the shifting quality of the automatic transmission. As an important actuator of the automatic transmission, the requirements for the hydraulic system are simple structure, light weight, fast response, and high enough reliability. [0003] The number of gears in the automatic transmission of traditional fuel vehicles is large, the valve body of the hydraulic system is large and the oil circuit is complicated. Therefore, a multi-block valve plate structure is often used, which is composed of an up...

AI Technical Summary

Problems solved by technology

But at the same time, the multi-block valve plate has unavoidable disadvantages, that is, the cost is very high in the early development stage and the small batch production stage, and the leakage of multi-face lamination is large, the roughness of the contact surface is high, the cost is high, and the pressure response is delayed. Wait

Images