A hydraulic shift control system and control method for an automatic transmission
A technology of automatic transmission and control system, which is applied in transmission control, fluid pressure actuation system components, fluid pressure actuation system testing, etc. Efficiency and shift quality, quantity reduction, cost reduction effect
Active Publication Date: 2019-10-29
CHINA FIRST AUTOMOBILE
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- Application Information
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Problems solved by technology
[0003] In the existing hydraulic shifting technology, as few combinations of solenoid valves and slide valves as possible are used to realize the shifting control. Most of the technical solutions are based on pressure control, and it is impossible to accurately control the moving speed of the shifting actuator. Realize precise control of shifting process
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[0025] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0026] Such as figure 1 As shown, the embodiment of the present invention provides a hydraulic shift control system for an automatic transmission, including: a pressure source, a pressure control valve 1, a flow control valve 2, a shift cylinder 3, and a pressure sensor D1. The inlet is connected to the pressure source, the outlet of the pressure control valve 1 is connected to the inlet of the flow control valve 2, and the outlet of the pressure control valve 1 is connected to the inlet of the flow control valve 2. There is the pressure sensor D1, the outlet of the flow control valve 2 is connected with the shift cylinder 3, and has multiple valve positions. The pressure control valve 1 outputs different shifting pressures according to the shifting dem...
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The invention provides a hydraulic gear shifting control system of an automatic transmission. The hydraulic gear shifting control system comprises a pressure source, a pressure control valve, a flow control valve, a gear shifting oil cylinder and a pressure sensor. An inlet of the pressure control valve is connected with the pressure source. The flow control valve controls the opening degree of acorresponding valve opening according to the gear shifting requirement so as to input the oil quantity corresponding to the gear shifting requirement to a gear shifting oil cylinder, and the gear shifting oil cylinder can carry out corresponding gear shifting operation through piston switching. The invention provides a control method of the hydraulic gear shifting control system. The whole gear shifting process can be completed through combined control of the pressure control valve and the flow control valve; by means of dual parameter hydraulic gear shifting control, the gear shifting processcan be precisely controlled, and impacting generated in the process of achieving gear shifting only through the pressure control valve can be reduced; and meanwhile, the number of solenoid valves, the number of reversing valves and the number of sliding valves are reduced, the cost is reduced, and the efficiency and gear shifting quality are improved.
Description
technical field [0001] The invention relates to the technical field of automatic transmissions, in particular to a hydraulic gear shift control system and a control method for automatic transmissions. Background technique [0002] With the advancement of science and technology, the way automobiles realize shifting has gradually evolved from manual to automatic shifting, which is realized through automatic transmissions. When the automatic transmission realizes automatic shifting, it needs a shift actuator, a system component, whose function is to realize the automatic shift function. At present, hydraulic shift actuators are mostly used. [0003] In the existing hydraulic shifting technology, as few combinations of solenoid valves and slide valves as possible are used to realize the shifting control. Most of the technical solutions are based on pressure control, and it is impossible to accurately control the moving speed of the shifting actuator. Realize the precise control...
Claims
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IPC IPC(8): F16H61/4008F16H61/4035F16H63/44F15B21/08F15B11/08F15B13/02F15B19/00
CPCF15B11/08F15B13/021F15B19/00F15B21/087F16H61/4008F16H61/4035F16H63/44
Inventor 朱建波顾强周旭辉刘振宇康志军叶珂羽
Owner CHINA FIRST AUTOMOBILE