Brake energy recovery hydraulic braking system based on VDC (Vehicle Dynamics Control)/VSC (Vehicle Stability Control)/ESP (Electronic Stability Program) pressure regulator

A technology of braking energy recovery and pressure regulator, which is applied in the direction of hydraulic brake transmission, brake transmission, brakes, etc., can solve the problem of low specific energy of the battery, achieve high efficiency, improve fuel economy, and small transformation Effect

Inactive Publication Date: 2010-09-22
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

One of the key issues faced in the research of electric vehicles is the low specific energy of the batteries ava...

Method used

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  • Brake energy recovery hydraulic braking system based on VDC (Vehicle Dynamics Control)/VSC (Vehicle Stability Control)/ESP (Electronic Stability Program) pressure regulator
  • Brake energy recovery hydraulic braking system based on VDC (Vehicle Dynamics Control)/VSC (Vehicle Stability Control)/ESP (Electronic Stability Program) pressure regulator

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] The present invention uses the VDC / VSC / ESP pressure regulator in the traditional vehicle braking system and the driving motor in the hybrid vehicle or electric vehicle to design the control software reasonably and reliably, and proposes a new type of braking energy feedback function. Braking System.

[0013] like figure 1 As shown, the brake hydraulic unit based on the traditional VDC / VSC / ESP pressure regulator includes two brake oil circuits: left front wheel-right rear wheel brake oil circuit and right front wheel-left rear wheel brake oil circuit, Each brake oil circuit includes six solenoid valves, an oil return pump, an oil return motor, a low-pressure accumulator, and two wheel cylinders. Under the control of this oil circuit, the specific configurations are as follows: Dynamic master cylinder 1, liquid storage chamber 2, brake pedal 3, e...

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Abstract

The invention discloses a brake energy recovery hydraulic braking system based on a VDC (Vehicle Dynamics Control)/VSC (Vehicle Stability Control)/ESP (Electronic Stability Program) pressure regulator, comprising a pressure regulator with the function of VDC/VSC/ESP, a braking main cylinder, a braking electric motor, a braking controller and a hybrid control unit. The brake energy recovery hydraulic braking system is characterized in that a main cylinder pressure sensor is arranged on an oil outlet pipeline of the braking main cylinder; a wheel cylinder pressure sensor is arranged on a front wheel cylinder of the pressure regulator; signals of the main cylinder pressure sensor and the wheel cylinder pressure sensor are all fed back to the braking controller; a drive electric motor is controlled by the hybrid control unit; and the braking controller performs CAN (Controller Area Network) communication with the hybrid control unit. The pressure regulator controls two paths of braking oil paths of front left wheel-right rear wheel and right front wheel-left rear wheel. The invention utilizes the drive electric motor to return braking torque to carry out brake energy feedback, utilizes the VDC/VSC/ESP pressure regulator to realize the increase, the maintenance and the decrease of the pressure of the wheel cylinder, ensures the drive safety, and can realize the regenerative braking and the integrated control of ABS (Anti-lock Brake System), ASR (Acceleration Slip Regulation) and ESP (Electronic Stability Program).

Description

technical field [0001] The invention relates to a hydraulic braking system of a vehicle, in particular to a hydraulic braking system based on a VDC / VSC / ESP pressure regulator for a hybrid vehicle or a pure electric vehicle with an active braking function to realize the braking energy recovery function . Background technique [0002] It is an important technology to improve the energy utilization rate of electric vehicles to recover the kinetic energy dissipated during braking by controlling the power components of electric vehicles. In this process, the electric motor is used as a generator, and the recovered energy is stored in the battery in the form of electricity. One of the key issues faced during electric vehicle research is the low specific energy of the batteries available in the market today, so that the driving range of electric vehicles cannot be compared with that of gasoline vehicles. To solve this problem, in addition to making breakthroughs in the bottleneck...

Claims

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Application Information

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IPC IPC(8): B60T13/565B60T13/60B60T13/68
Inventor 张俊智张彪李守波陈鑫
Owner TSINGHUA UNIV
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