Automobile hydraulic brake boosting control method
A technology of hydraulic braking and control method, applied in the direction of brakes, brake safety systems, brake transmission devices, etc., can solve the problems of misactivation of functions, unclear reasons for drivers, safety accidents, etc.
Active Publication Date: 2021-06-11
CHONGQING CHANGAN AUTOMOBILE CO LTD
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Problems solved by technology
This hydraulic brake booster control method has the following deficiencies: (1) There are too few conditions for judging the activation or inactivation of the hydraulic brake booster function, and there are situations where the function is misactivated or the function should be activated but is not activated; When the power assist function is not activated, there is no alarm signal output, and the driver does not know the cause of the failure, which may lead to safety accidents due to insufficient braking force during driving
Method used
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Embodiment Construction
[0022] Such as figure 1 As shown, to realize the hydraulic brake boosting control method in the present invention, the control system adopted includes an electronic stability controller assembly 1, an engine control unit 2, a vacuum sensor 3, a wheel speed sensor 4 and an instrument 5, and the vacuum The sensor 3 is connected to the engine control unit 2 by hard wires, the electronic stability controller assembly 1 is integrated with a master cylinder pressure sensor (to detect the master cylinder pressure signal), and the wheel speed sensor 4 is connected to the electronic stability controller assembly 1 by hard wires , the electronic stability controller assembly 1 is connected with the engine control unit 2 and the instrument 5 through the CAN bus. The vacuum degree sensor 3 detects the vacuum degree signal and sends it to the engine control unit 2, the wheel speed sensor 4 detects the wheel speed signal and sends it to the electronic stability controller assembly 1, and th...
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The invention discloses an automobile hydraulic brake boosting control method. An adopted control system comprises an electronic stability controller assembly, an engine control unit, a vacuum degree sensor, a wheel speed sensor and an instrument. The engine control unit acquires a vacuum degree signal, a main cylinder pressure signal and a vehicle speed signal, sets a vacuum degree state and sends a vacuum degree value and the vacuum degree state to the electronic stability controller assembly through a CAN bus. When receiving the vacuum degree value and the vacuum degree state, the electronic stability controller assembly controls the hydraulic brake boosting function to be activated or not activated according to the vacuum degree value, the vacuum degree state and the main cylinder pressure,and sends the activated or non-activated state of the hydraulic brake boosting function to an instrument to be displayed. According to the method, the situation that the hydraulic brake boosting function is mistakenly activated or should be activated but not activated in the driving process can be avoided, and enough warning is given to a driver.
Description
technical field [0001] The invention belongs to the field of automobile braking, and in particular relates to an automobile hydraulic brake boosting control method. Background technique [0002] In recent years, the technology of the automobile industry has developed rapidly, and the electronic stability control system (Electronic Stability Program, ESP) has basically become the standard configuration of domestic passenger cars. As an additional function of ESP, the hydraulic brake booster (HBB) function with insufficient vacuum booster can assist the driver in braking, reduce the braking distance, and improve the braking efficiency. It is a typical automotive driving assistance function. [0003] When the existing electronic stability controller assembly performs hydraulic brake boosting control, it only controls the activation or inactivation of the hydraulic brake boosting function according to the magnitude of the vacuum degree and the master cylinder pressure. When the...
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Login to View More IPC IPC(8): B60T13/66B60T17/22
CPCB60T13/66B60T17/22Y02T10/40
Inventor 卢天义赵喜龙
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD