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Gear shifting electro-hydraulic system with automatic emergency-meeting gear shifting function

An automatic switching and electro-hydraulic technology, which is applied in the field of vehicles, can solve the problems of the automatic transmission losing the gear shifting function, the inability to realize automatic switching, and the inability of the vehicle to drive, so as to achieve the effect of improving driving safety and mobility

Active Publication Date: 2015-03-25
SPECIAL VEHICLE TECH CENT OF HUBEI AEROSPACE TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the electronic control system loses power supply, the automatic transmission will lose the shifting function and the vehicle will not be able to drive
Some automatic transmissions are designed with emergency gears, but automatic switching cannot be realized

Method used

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  • Gear shifting electro-hydraulic system with automatic emergency-meeting gear shifting function
  • Gear shifting electro-hydraulic system with automatic emergency-meeting gear shifting function
  • Gear shifting electro-hydraulic system with automatic emergency-meeting gear shifting function

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Embodiment Construction

[0029] see figure 1 , the embodiment of the present invention provides a shifting electro-hydraulic system with the function of automatic switching of emergency gears, including: a first normally open electro-hydraulic shift valve 101, a second normally open electro-hydraulic shift valve 102, a second normally open electro-hydraulic shift valve A normally closed electro-hydraulic shift valve 103, a second normally closed electro-hydraulic shift valve 104, a third normally closed electro-hydraulic shift valve 105, a proportional valve 301, a first lock with a differential pressure function valve, a second lock valve with two differential pressure functions, a first clutch 201 , a second clutch 202 , a first brake 203 , a second brake 205 and a third brake 204 . The first normally open electro-hydraulic shift valve 101, the second normally open electro-hydraulic shift valve 102, the first normally closed electro-hydraulic shift valve 103, the second normally closed electro-hydra...

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PUM

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Abstract

The invention relates to the technical field of vehicles, in particular to a gear shifting electro-hydraulic system with the automatic emergency-meeting gear shifting function. The gear shifting electro-hydraulic system is formed by a first normally-open type electro-hydraulic gear shifting valve, a second normally-open type electro-hydraulic gear shifting valve, a first normally-closed type electro-hydraulic gear shifting valve, a second normally-closed type electro-hydraulic gear shifting valve, a third normally-closed type electro-hydraulic gear shifting valve, a proportional valve, a first locking valve with the one-portion differential pressure function, a second locking valve with the two-portion differential pressure function, a first clutch, a second clutch, a first brake, a second brake and a third brake. According to the gear shifting electro-hydraulic system with the automatic emergency-meeting gear shifting function, five gear shifting executive elements can be controlled to achieve multi-gear normal shifting, any gear can be shifted into a reasonable gear when an electronic control system suddenly fails or is suddently powered off, normal traveling of a vehicle can be achieved without stopping the vehicle or restarting the electronic system, and the traveling safety performance and the traveling maneuverability of the vehicle under the emergency condition are greatly improved.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an electro-hydraulic system for gear shifting with the function of automatic switching of emergency gear positions. Background technique [0002] At present, most hydraulic automatic transmissions at home and abroad use electro-hydraulic automatic shifting systems. In the event that the electronic control system loses power supply, the automatic transmission will lose its shifting function and the vehicle will not be able to drive. Some automatic transmissions are designed with emergency gears, but automatic switching cannot be realized. Usually, emergency stop is required after the electric control system loses power, and the driving can only be resumed after the emergency gear is switched by emergency power supply or manual mode. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an automatic transmission that can a...

Claims

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Application Information

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IPC IPC(8): F16H61/02F16H61/40F16K11/065
CPCF16H61/40F16K11/07
Inventor 周慎梁东伟夏斯刘杨向雪峰周谊
Owner SPECIAL VEHICLE TECH CENT OF HUBEI AEROSPACE TECH RES INST