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A device and control method for suppressing hydraulic fluctuation and shock of ehb power assist system

A suppression device and booster system technology, which is applied in the direction of braking transmission device, braking safety system, brake, etc., can solve problems such as endangering the life safety of operators, unstable operation of the system, system vibration and noise, etc., and achieves low cost, Simple structure and improved hydraulic performance

Active Publication Date: 2020-10-16
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, torque pulsation will also cause vibration and noise in the system. In severe cases, the system will not be able to run stably, and even lead to brake failure, endangering the life safety of operators and posing a major safety hazard.

Method used

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  • A device and control method for suppressing hydraulic fluctuation and shock of ehb power assist system
  • A device and control method for suppressing hydraulic fluctuation and shock of ehb power assist system
  • A device and control method for suppressing hydraulic fluctuation and shock of ehb power assist system

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Such as figure 1 , 2 As shown, the EHB booster system hydraulic fluctuation shock suppression device of the present invention includes a control device, a master cylinder housing 44, a first liquid inlet 2, a second liquid inlet 3, a first piston 7, a second piston 4, a first A piston chamber 6, a second piston chamber 1, a first oil outlet 26, a second oil outlet 24, a first damping hole 5, a second damping hole 15, an oil return hole 12, an impact hole 14, and a poppet valve core 13. First spring 11, push rod 10, proportional electromagnet 9, first displacement sensor 8, second displacement sensor 29, pressure sensor 25, motor 18, gear I19, gear II20, gear III21, gear IV22, pedal push rod 45. The second spring 31, the linear displacement coupling mechanism 28, and the push block 23. The first piston chamber 6 and the second piston chamber 1 are coaxial and co...

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Abstract

The invention discloses a hydraulic fluctuation impact restraining device of an EHB power assisting system, and a control method thereof. The device comprises a controller, a main cylinder shell, a first piston, a second piston, a cone valve core, a first spring, a push rod, a proportional electromagnet, a motor, a pedal push rod and a linear displacement coupling mechanism; the main cylinder shell is provided with a first piston cavity, a second piston cavity, an impact hole and a valve core hole, and the first piston and the second piston are arranged in the first piston cavity and the second piston cavity respectively; the first piston cavity is provided with a first liquid inlet and a first oil outlet; the second piston cavity is provided with a second liquid inlet and a second oil outlet; and a first damping hole and a second damping hole are formed in the first liquid inlet, the second damping hole is connected with an impact hole, the impact hole is communicated with the secondpiston cavity, the impact hole is connected with a valve core hole, and the cone valve core and the push rod are arranged in the valve core hole. The device is simple in structure, easy to process, low in cost, and can greatly reduce the requirements of a high-precision motor and greatly improve the comprehensive performances of a brake system.

Description

technical field [0001] The invention relates to a hydraulic fluctuation shock suppressing device and a control method of an EHB booster system. Background technique [0002] Electro-hydraulic brake system (EHB) is one of the important development directions of new energy vehicle brake-by-wire system. Its main feature is to use a new type of electric booster to replace the traditional vacuum booster, retain the traditional mature and reliable hydraulic part, and has outstanding advantages such as compact structure, fast response, easy regenerative braking, and precise control of braking force. At present, there are two forms of EHB booster systems, "hydraulic pump + high-pressure accumulator" and "electric motor + deceleration mechanism". However, in new energy vehicles, they all require the electric motor to provide energy sources to ensure vehicle driving safety. Therefore, the motor assist control in the electronic hydraulic braking (EHB) system has become a key technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T13/12B60T13/74B60T17/22
CPCB60T13/12B60T13/745B60T17/22
Inventor 刘金刚肖培杰王伟达傅兵胡余良孟步敏
Owner XIANGTAN UNIV
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