Two-stage hill-holding system and vehicle

Abstract

The invention discloses a two-stage hill-holding system and a vehicle. The two-stage hill-holding system comprises a two-stage hill-holding manual valve which has a first driving state, a parking state and a temporary parking state; a parking brake subsystem which comprises a first relay valve and a spring brake cylinder; and a temporary stop function subsystem which comprises a second relay valve and a brake air chamber; When the two-stage hill-holding manual valve is switched from the first driving state to the parking state, the two-stage hill-holding manual valve controls the first relay valve to enable the spring brake cylinder to exhaust air, and a parking braking function is achieved. When the two-stage hill-holding manual valve is switched from the parking state to the temporary parking state, the two-stage hill-holding manual valve controls the first relay valve to enable the spring brake cylinder to exhaust air, and controls the second relay valve to inflate the brake air chamber, and the parking brake function and the temporary parking function are achieved. The working states of the parking braking subsystem and the temporary parking function subsystem are controlled through the three states of the two-stage slope parking manual valve, and when a vehicle is parked on a slope, the two subsystems work at the same time to improve the slope parking capacity.

Description

technical field

[0001] The invention relates to the technical field of automobiles, in particular to a two-stage parking slope system and a vehicle. Background technique

[0002] At present, commercial vehicles on the market generally have heavy load-bearing working conditions. Under such working conditions, the parking brake system of the original car cannot provide enough parking force to meet the actual needs of users, especially in areas with large slopes such as mountainous areas. The parking capacity requirements are higher under heavy load conditions. In the prior art, the reliability of the temporary parking of the vehicle is relatively low, and the prior art still needs to be improved and developed. Contents of the invention

[0003] The object of the present invention is to provide a two-stage parking slope system and a vehicle, so as to solve the problem of insufficient parking capacity in the prior art when the vehicle is parked on a slope or other working con...

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