Front-front drive type automatic transmission and its control method

Abstract

The invention discloses a front-drive type automatic transmission, which includes a mechanical actuator, a hydraulic control system and an oil supply system, wherein the oil supply system includes a mechanical pump, an electric pump and a pressure regulating valve; the mechanical pump is connected with the engine in the motor vehicle , the oil suction port of the mechanical pump is connected with the oil pan, and the oil outlet of the mechanical pump is connected with the hydraulic control system through the check valve; the electric pump is connected with the power supply system in the motor vehicle, and the oil suction port of the electric pump is connected with the oil pan, The oil outlet of the electric pump is connected with the hydraulic control system through the one-way valve; the pressure regulation port of the pressure regulating valve is connected with the oil outlet of the mechanical pump, the oil return port of the pressure regulating valve is connected with the oil suction port of the mechanical pump, and the pressure regulating valve Used to regulate the pressure and flow of hydraulic oil entering the hydraulic control system. The front and front drive type automatic transmission disclosed by the present invention can respond quickly when the engine is just started, thereby satisfying the quick start requirement of the whole vehicle. The invention also discloses a specific control method.

Description

technical field [0001] The invention belongs to the technical field of motor vehicle gearboxes, in particular to a front-drive type automatic gearbox and a control method thereof. Background technique [0002] The gearbox of a motor vehicle has the following functions: 1. Change the transmission ratio; 2. Under the condition that the rotation direction of the engine remains unchanged, the motor vehicle can run backwards; . [0003] The gearbox usually includes a mechanical actuator, a hydraulic control system, and an oil supply system for sending hydraulic oil into the hydraulic control system. At present, there is a mechanical pump in the oil supply system of the gearbox, which provides the hydraulic oil required by the hydraulic control system, thereby providing the oil pressure required for clutch pressing and the lubricating oil required for gear bearings. The engine is connected and driven by the engine. [0004] However, the current gearbox has the following problem...

AI Technical Summary

Problems solved by technology

[0004] However, the current transmission has the following problems: After the engine of the motor vehicle is started, the transmission can only operate normally after the engine reaches a certain speed, that is to say, the transmission cannot respond quickly when the engine just starts

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