Real-time braking distributing device and method for motor vehicle
A technology for distributing device and braking force, applied in the direction of brakes, etc., to prevent tail drift and side shift, control distribution is simple, and improve balance
Active Publication Date: 2011-01-12
BYD CO LTD
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Problems solved by technology
When a motor vehicle brakes on a road with a relatively good adhesion coefficient at a certain deceleration, the load transfer will make the front axle load greater than the rear axle load. However, the existing EBD cannot change the load according to the deceleration and the resulting load. And adjust the braking force of the front and rear axles in real time
It only reduces the braking force when the rear wheels are about to be locked, but does not respond to the increase in front axle load, and increases the braking force of the front wheels accordingly. As a result, the adhesion of the front wheels cannot be fully utilized, and the braking distance of the motor vehicle lengthen
Method used
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[0037]The brake master cylinder 18 is mechanically connected to the brake pedal 16 and connected to the brake master cylinder pressure sensor 20 . The brake master cylinder pressure sensor 20 is connected to the normally open valve 22 in the hydraulic system. Normally open valve 22 is connected with front wheel braking force control valve 24, rear wheel braking force control valve 26 and check valve 32 respectively; The control valve 26 is connected to the rear brake wheel cylinder pressure relief valve 30, and the check valve 32 is connected to the hydraulic pump 34; the front brake wheel cylinder pressure relief valve 28, the rear brake wheel cylinder pressure relief valve 30 and the hydraulic pump 34 are all connected to the liquid storage chamber 40 connections. The front wheel braking force control valve 24 is also sequentially connected with the front brake wheel cylinder pressure sensor 36 and the front brake wheel cylinder 42. The rear brake force control valve 26 is...
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The present invention discloses real-time braking force distributing device and method for motor vehicle. The real-time braking force distributing device includes one front suspension displacement sensor and one rear suspension displacement sensor for detecting the compression deformations of the front and the back suspension springs separately, and one electronic control unit to accept the detected compression deformations. The real-time braking force distributing method includes the following steps: 1. entering to the main control process to calculate the load ratio between front and rear wheels; 2. recognizing whether the vehicle to be in brake state and selecting whether to enter the braking force distribution; and 3. recognizing whether the vehicle to be in emergency brake state, selecting the boost control sub-process or decompression control sub-process and controlling the front-to-rear braking pressure ratio to equal to the load ratio. The present invention can ensure smooth and safe running.
Description
technical field [0001] The invention relates to the field of motor vehicle braking, in particular to a device and method for real-time distribution of braking force of a motor vehicle. Background technique [0002] Since the front and rear tires of a motor vehicle adhere to different conditions on the ground, it is easy to cause slipping, tilting and rollover due to the different friction between the tires and the ground during braking. System, abbreviated as ABS) motor vehicles, generally use electronic brake force distribution device (Electric Brake force Distribution, abbreviated as EBD) as an auxiliary part of ABS, improve the efficacy of ABS, to ensure the driving safety of motor vehicles. When a motor vehicle brakes on a road with a relatively good adhesion coefficient at a certain deceleration, the load transfer will make the front axle load greater than the rear axle load. However, the existing EBD cannot change the load according to the deceleration and the resulti...
Claims
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IPC IPC(8): B60T8/18
Inventor 宋佑川王国保胡庚伟
Owner BYD CO LTD