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Hydraulic gear shifting system of dual-clutch automatic transmission

An automatic transmission, dual clutch technology, applied in transmission control, fluid pressure actuating device, servo motor, etc., can solve the problem of high cost, achieve the effect of low cost, less pressure control stages, and simplified structure

Inactive Publication Date: 2021-02-02
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For an 8-speed or 9-speed dual-clutch transmission, at least 5 shift forks are required, so a more complex hydraulic shift system is required to support the multi-speed requirements of the transmission. The traditional hydraulic pressure of an 8-speed or 9-speed dual-clutch transmission The shifting system scheme will exceed the use of 5 solenoid valves, and the more solenoid valves, the higher the cost

Method used

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  • Hydraulic gear shifting system of dual-clutch automatic transmission

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] refer to figure 1 The hydraulic shifting system of a dual-clutch automatic transmission shown includes a first pressure solenoid valve 31 and a second pressure solenoid valve 32 whose inlets are respectively communicated with the main oil circuit, and is characterized in that: the first pressure solenoid valve 31 passes The oil passage is connected to the first flow solenoid valve 33 and the second flow solenoid valve 34; the first flow solenoid valve 33 is connected to the first logic valve 41 through the oil passage, and the first logic valve 41 is connected to the first logic valve 41 through the oil passage. The first shift piston cylinder 61 is connected to the second shift piston cylinder 62; the second flow solenoid valve 34 is connected to the second logic valve 42 through the oil circuit, and the second logic valve 42 is connected to the second logic ...

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Abstract

The invention relates to a hydraulic gear shifting system of a double-clutch automatic transmission. The hydraulic gear shifting system comprises a first pressure electromagnetic valve and a second pressure electromagnetic valve which are communicated with a main oil way; the first pressure electromagnetic valve is connected and communicated with a first flow electromagnetic valve and a second flow electromagnetic valve through the oil way; the first flow electromagnetic valve is connected and communicated with a first logic valve through the oil way, and the first logic valve is connected andcommunicated with a first gear shifting piston cylinder and a second gear shifting piston cylinder through the oil way; the second flow electromagnetic valve is connected and communicated with a second logic valve through the oil way, and the second logic valve is connected and communicated with a third gear shifting piston cylinder through the oil way; the second logic valve is further connectedand communicated with a third logic valve through the oil way, and the third logic valve is connected and communicated with a fourth gear shifting piston cylinder and a fifth gear shifting piston cylinder through the oil way; and the second pressure electromagnetic valve is connected and communicated with the first logic valve, the second logic valve and the third logic valve through the oil way.According to the hydraulic gear shifting system of the dual-clutch automatic transmission provided by the invention, the number of the electromagnetic valves can be reduced, shifting forks with the number larger than that of the electromagnetic valves are controlled, and the control difficulty can be reduced.

Description

technical field [0001] The invention relates to an automobile transmission, in particular to a hydraulic shift system of a double-clutch automatic transmission. Background technique [0002] For dual-clutch automatic transmissions, with more stringent energy consumption requirements, multi-speed dual-clutch transmissions such as 8-speed or 9-speed dual-clutch transmissions will become a future development trend. For an 8-speed or 9-speed dual-clutch transmission, at least 5 shift forks are required, so a more complex hydraulic shift system is required to support the multi-speed requirements of the transmission. The traditional hydraulic pressure of an 8-speed or 9-speed dual-clutch transmission The shifting system scheme will exceed the use of 5 solenoid valves, and the more solenoid valves, the higher the cost. Therefore, there is a need for further improvement in the hydraulic shifting system of the existing dual-clutch automatic transmission. [0003] CN 109296748A disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/30F15B11/16F15B13/06
CPCF15B11/16F15B13/06F16H61/0021F16H61/30
Inventor 刘飞刚袁标赵宗琴舒绍波蔡辰李孟宇王肖彬
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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