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A hydraulic shift control system for an automatic transmission of a motor vehicle

A technology of automatic transmission and shift control, applied in control/regulation systems, vehicle gearboxes, mechanical control devices, etc., can solve the problems of increasing gears, high pressure, energy consumption, etc., and achieve stable pressure, simple structure, and cost. low effect

Active Publication Date: 2022-02-25
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some transmissions cannot cut off the clutch in an emergency, and some transmissions do not have a limp function
On the other hand, in order to improve fuel economy, the existing transmission needs to increase the gear, and it is required that the number of solenoid valves in the hydraulic system cannot be increased accordingly, which increases the design difficulty
[0003] The existing invention patent with application number 201380058612.X discloses a hydraulic control device for an automatic transmission, through the combination of VP pressure regulating valve, clutch regulator valve KV and one-way valve KSV, it has the clutch emergency cut-off function, and the clutch pressure is stable ;Separate oil supply through odd and even gears, with limp function; 7 forward gears and 1 reverse gear can be realized by controlling 4 shift forks; through the combination of VP pressure regulating valve, GSV gear adjustment valve and shift fork, Realize the pressure control of the shift fork, but it is not conducive to the precise control of the position of the shift fork; since both the clutch and the shift fork are controlled by pressure difference, the pressure of the system needs to be high, which consumes more energy

Method used

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  • A hydraulic shift control system for an automatic transmission of a motor vehicle
  • A hydraulic shift control system for an automatic transmission of a motor vehicle
  • A hydraulic shift control system for an automatic transmission of a motor vehicle

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Please refer to the attached figure 1 , a hydraulic shift control system for an automatic transmission of a motor vehicle provided by the present invention includes a clutch device and a gear adjustment device respectively connected to a pressure source, and the clutch device includes a first clutch and a second clutch , between the pressure source and the first clutch, and between the pressure source and the second clutch are respectively provided with pressure control solenoid valves; the gear adjustment device includes a first gear switching slide valve 41 , the second gear conversion slide valve 42, the gear switch solenoid valve 31 and at least five shift forks, the gear switch solenoid valve 31 is connected with the pressure source and used to select the first gear every time One of the switching spool valve 41 and the second gear switching spool valve 42, the first gear switching spool valve 41 controls the displacement of the first shift fork 51 and the second s...

Embodiment 2

[0061] Please refer to the attached figure 2 The difference between this embodiment and the first embodiment is that the input end of the third flow control solenoid valve 23 is connected to the first pressure control solenoid valve 11 instead of the second pressure control solenoid valve 12 .

[0062] During its working process, in order to realize the function of the R gear, the first pressure solenoid valve 11 is energized, and the input port 11a is connected to the output port 11b. According to the pressure demand, the current is controlled, and the output port 11b outputs the target pressure, and the oil path 113 leads to The input port 23a of the third flow control solenoid valve 23 leads to the input port 13a of the third pressure control solenoid valve 13 through the oil passage 112; the current of the third flow control solenoid valve is controlled so that it is in position one, and the input port 23a communicates The output port 23c can control the output flow rate ...

Embodiment 3

[0064] Please refer to the attached image 3 , The difference between this embodiment and Embodiment 1 is that the flow control solenoid valve is replaced by a three-position four-way with a four-position four-way, but its function is the same. The flow control solenoid valve has four positions from right to left, and its position 1 and position 3 have the same function as position 2 of the flow control solenoid valve of the first embodiment, and its position 2 is the same as that of the flow control solenoid valve of the first embodiment. Position 1 has the same function, and position 4 has the same function as position 3 of the flow control solenoid valve in Embodiment 1.

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Abstract

The invention discloses a hydraulic shift control system for an automatic transmission of a motor vehicle, which includes a clutch device and a gear adjustment device respectively connected to a pressure source. The invention uses as few combinations of control valves as possible to realize Eight forward gears and one reverse gear, few hydraulic components, simple structure and low cost; each gear shift fork can realize double control of pressure and flow; odd gear and even gear are supplied separately, when odd gear is faulty, Even-numbered gears can be used to limp, and odd-numbered gears can be used to limp when even-numbered gears fail. It has the clutch emergency cut-off function, has the limp function, and the clutch pressure is more stable.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a hydraulic shift control system for an automatic transmission of a motor vehicle. Background technique [0002] At present, most of the automatic transmissions used in motor vehicles at home and abroad adopt a hydraulic shift control system, which generally only has 7 forward gears and 1 reverse gear. Some transmissions cannot cut off the clutch in an emergency, and some transmissions do not have a limp function. On the other hand, in order to improve fuel economy, the existing transmission needs to increase the gear, and it is required that the number of solenoid valves in the hydraulic system cannot be increased accordingly, which increases the design difficulty. [0003] The existing invention patent with the application number 201380058612.X discloses a hydraulic control device for an automatic transmission. Through the combination of the VP pressure regula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/06F16H61/30F16H63/32F15B21/08
CPCF16H61/061F16H61/065F16H61/30F16H63/32F15B21/087F16H2061/308F16H2200/006F16H2200/0082F16H2200/2035
Inventor 梁东伟黄新志邓云飞栾智存殷艳飞杨毅骁
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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