Hydraulic system capable of lowering hydraulic oil source startup frequency of AMT (Automated Mechanical Transmission)

Abstract

The invention provides a hydraulic system capable of lowering hydraulic oil source startup frequency of an AMT (Automated Mechanical Transmission). The system comprises a one-way valve (1), a hydraulic control one-way valve (2) and a pressure sensor (3), wherein the one-way valve (1) comprises inlets, which are respectively connected with an oil filter (4) and a control end of the hydraulic control one-way valve (2), and outlets which are respectively connected with a gear shift control valve and an oil inlet of the hydraulic control one-way valve (2); an oil outlet of the hydraulic control one-way valve (2) is connected with a power accumulator (5) and the pressure sensor (3) respectively. According to the hydraulic system, the hydraulic oil source startup frequency of the AMT caused by hydraulic pressure leakage can be effectively lowered when an AMT system has no gear shifting action, and thus, the service lives of a hydraulic oil source and a control relay are prolonged.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a hydraulic system for reducing the starting frequency of an AMT hydraulic oil source. Background technique [0002] With the rapid development of urban logistics and the continuous growth of population mobility, the existing commercial vehicles have been rapidly developed, and AMT has become an important direction for the advancement of transmission automation technology. A large number of manual transmissions equipped on commercial vehicles need to be automated. [0003] The mechanical automatic transmission is based on the traditional fixed-shaft transmission and clutch, applies electronic technology and automatic transmission theory, takes the electronic control unit (TCU) as the core, and controls the separation and engagement of the clutch, selection and shift operation and adjustment of the clutch through the execution system. The engine throttle is used to realize the automatic opera...

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Problems solved by technology

[0005] The invention patent application with the application number 201210430797.X discloses a hydraulic system for hybrid power. The technical solution has the following disadvantages: 1) The switching control valve in the system is a solenoid valve, and frequent switching will affect the life of the solenoid valve. Cause failure; 2) The switch control valve in the system is a slide valve structure with poor sealing performance, which may cause the pressure of the accumulator to drop

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