Hill-start braking device and start method applied to pneumatic braking vehicle type

Abstract

The invention discloses a hill-start braking device and a start method applied to a pneumatic braking vehicle type. The device comprises a relay valve, an air reservoir, two ABS electromagnetic valves, a two-way valve and a normally-closed electromagnetic valve, wherein the air reservoir and the two ABS electromagnetic valves are connected with the relay valve; a first air port of the two-way valve is connected with a brake master cylinder of a vehicle, a second air port of the two-way valve is connected with the relay valve, a third air port of the two-way valve is connected with the second air port of the normally-closed electromagnetic valve, and the first air port of the normally-closed electromagnetic valve is connected with an auxiliary air reservoir of the vehicle. After the vehicleenters a starting mode, the normally-closed electromagnetic valve is powered on and opened, a high-pressure air source of the auxiliary air reservoir enters the two-way valve through the normally-closed electromagnetic valve and then enters the relay valve, driving wheel braking is achieved, and the vehicle is prevented from sliding downwards. Rear wheel braking is automatically controlled through the normally-closed electromagnetic valve and the slope sensor, slope starting difficulty of a driver is effectively reduced, slope sliding during starting is prevented, and efficiency and safety ofthe whole vehicle are improved.

Description

technical field [0001] The invention relates to the field of slope start control, in particular to a slope start brake device and a start method applied to pneumatic brake vehicles. Background technique [0002] When a traditional air brake vehicle starts on a slope, the driver needs to step on the accelerator first, and release the parking brake when the estimated driving torque is sufficient to overcome the slope. The following problems are prone to occur: [0003] 1. There is a problem that the accelerator is stepped on too much, but the parking brake is still not released, and the brake is worn. [0004] 2. There is a problem that the parking brake is released too early and the whole vehicle slides downhill [0005] 3. The driving torque required for different slopes is different, and it is difficult for the driver to operate. Contents of the invention [0006] The object of the present invention is: to provide a slope start brake device and start method applied to ...

AI Technical Summary

Problems solved by technology

[0003] 1. There is a problem that the parking brake is not released when the accelerator is stepped on too much, and the brake is worn

[0004] 2. There is a problem that the parking brake is released too early and the whole vehicle slides downhill

[0005] 3. The driving torque required for different slopes is different, and the driver is more difficult to operate

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