A vehicle active power-assisted braking device and its control method

A technology of a braking device and a control method, which is applied to braking transmissions, brakes, vehicle components, etc., can solve problems such as prolonged response time, oil leakage, and inability to meet continuous long-term braking, and shorten the pressure build-up time. , The effect of overcoming oil leakage and meeting application requirements

Active Publication Date: 2019-02-26
ANHUI POLYTECHNIC UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, this solution uses a high-pressure accumulator to decompress in advance. Although the pressure building time is shortened, there is a risk of oil leakage. When the oil pressure of the accumulator is lower than the set value, the pressure is built again. In addition, a two-position three-way solenoid valve is used to control the position of the spool by controlling the current of the solenoid valve coil. The demand for time braking, especially for vehicles without EPB braking system, it is impossible to achieve long-term parking braking

Method used

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  • A vehicle active power-assisted braking device and its control method
  • A vehicle active power-assisted braking device and its control method
  • A vehicle active power-assisted braking device and its control method

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Embodiment Construction

[0040] The vehicle active power-assisted braking device of the present invention replaces the two-position three-way solenoid valve 9 with a three-position three-way solenoid valve 9 with a self-locking function, which can maintain pressure for a long time in a power-off state and ensure foot braking at the same time and failure mode braking effectiveness and reliability.

[0041] That is, holes are opened in the vacuum chamber 3 and the working chamber 4 of the original vehicle vacuum booster, and the lead-out pipelines are connected with the two input ports of the three-way solenoid valve 9 with self-locking function, and the other port of the solenoid valve is directly connected to the atmosphere. By controlling the coils at both ends of the solenoid valve and the self-locking mechanism, the three-way solenoid valve 9 can be set to the left when it is powered on, reset in the middle of power failure, and set to the right when the power is turned off by the self-locking mecha...

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Abstract

The invention discloses an active assisting braking device of an automobile. The active assisting braking device comprises a brake pedal push rod, a braking main cylinder push rod, a vacuum cavity, a working cavity and a three-way electromagnetic valve. According to the active assisting braking device, a high-pressure accumulator is omitted, a two-position three-way electromagnetic valve is replaced with the three-position three-way electromagnetic valve with a self-locking function, the effect that pressure is maintained for a long time in the power-down state can be achieved, and meanwhile, the effectiveness and reliability of foot braking and failure mode braking can be guaranteed.

Description

technical field [0001] The invention relates to the field of vehicle braking, in particular to an active power-assisted braking device and a realization method. Background technique [0002] With the development of vehicle driving assistance and intelligent driving technology, traditional vehicle braking can no longer meet the braking demand, and active braking must be added. The current mainstream solution is based on the hydraulic brake system, which realizes the active boost function on the basis of the original brake system ESP or realizes the active booster device in series / parallel on the dual input pipeline between the brake master cylinder and ABS / ESP. . [0003] In addition, there is another way to achieve active braking, which is to improve the vacuum booster and realize active booster braking through electronic control, which can simulate the driver stepping on the brake pedal to achieve braking through the vacuum booster. During the process, the original car br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/57B60T13/72B60T17/22
CPCB60T13/57B60T13/72B60T17/22
Inventor 刘贵如汪军强俊卢桂馥邹姗刘涛陶皖
Owner ANHUI POLYTECHNIC UNIV
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