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An electro-hydraulic composite braking control method and control device for an electric vehicle

An electro-hydraulic composite, braking control technology, applied in the direction of brakes, can solve the problems of non-recovery, dissipation of braking energy, insufficient braking efficiency, etc., to improve energy utilization efficiency, ensure braking feeling, and good braking feeling. Effect

Inactive Publication Date: 2016-03-02
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional internal combustion engine vehicles use a hydraulic braking system, and the braking energy is lost in the form of heat through friction during braking, and the braking energy cannot be recovered
If the electric vehicle only relies on the motor for feedback braking, the braking energy will be recovered in the form of electric energy, but there is a disadvantage of insufficient braking efficiency

Method used

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  • An electro-hydraulic composite braking control method and control device for an electric vehicle
  • An electro-hydraulic composite braking control method and control device for an electric vehicle

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0014] The electro-hydraulic hybrid braking system is a braking system in which regenerative braking and traditional hydraulic braking are coordinated and controlled in electric vehicles. Electric vehicles use the principle of motor regenerative power generation to generate motor braking torque to act on the driving wheels to achieve braking of the vehicle, and the generated regenerative power is recycled to the battery through the conversion circuit to realize the recovery of braking energy. Under certain vehicle braking intensity requirements, the coordinated control of regenerative braking and hydraulic braking can not only realize the recovery of braking energy, but also realize more flexible braking force control, making the front and rear wheel braking force distribution closer to ideal braking. moving curve.

[0015] The invention provides an electro-hydrauli...

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Abstract

The invention discloses a brake control method for an electric vehicle use and a controlling device thereof, and belongs to the technical field of electric vehicles. The controlling device comprises wheels, wheel brakes, an electric-hydro complex brake ECU, a brake pedal, a brake pedal position sensor, a hydraulic control module, a hydraulic braking system, a motor, a battery, a vehicle speed sensor, a motor control module, an ABS control module, and wheel speed sensors. The method comprises the following steps: determining the braking purpose of a driver according to the driving state, the braking strength, and the state of the motor and the battery of the electric vehicle, determining and choosing a braking mode according to the braking purpose, the battery SOC value, and the state of the ABS, and conducting coordination control for the motor regenerative braking and the hydraulic braking to allow the electric vehicle to provide an excellent braking experience for the driver on the basis of guaranteeing the braking safety. Therefore, under the premise that the braking efficiency can be guaranteed, braking energies are recycled by utilizing the regenerative braking of the motor, and the energy utilization efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and relates to a braking system control method of the electric vehicle, in particular to a combined control method of motor feedback braking and hydraulic braking for the electric vehicle. Background technique [0002] With the aggravation of energy problems and environmental problems, the research and application of electric vehicles is of great significance. Improving the driving range of electric vehicles has become a research hotspot of electric vehicles. Traditional internal combustion engine vehicles use a hydraulic braking system, and the braking energy is lost in the form of heat through friction during braking, and the braking energy cannot be recovered. If the electric vehicle only relies on the motor for feedback braking, the braking energy will be recovered in the form of electric energy, but there is a disadvantage of insufficient braking efficiency. Therefore, the combin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/60
Inventor 姬芬竹周晓旭徐斌杨世春
Owner BEIHANG UNIV
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