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Hydraulic braking system of four-wheel driven electric vehicle

A technology of electric vehicles and hydraulic braking, which is applied in the direction of brakes, vehicle components, braking transmissions, etc., can solve the problem of little research on braking energy recovery hydraulic braking systems, and achieve the effect of improving fuel economy

Active Publication Date: 2011-01-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Toyota-Prius brake control system and the Honda-EV plus brake control system represent the forefront of the development of brake feedback functions, however, relatively little research has been done on hydraulic brake systems for braking energy recovery in 4WD electric vehicles

Method used

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  • Hydraulic braking system of four-wheel driven electric vehicle
  • Hydraulic braking system of four-wheel driven electric vehicle
  • Hydraulic braking system of four-wheel driven electric vehicle

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Embodiment Construction

[0008] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0009] The present invention provides a solution for recovering the braking energy of electric vehicles. It transforms the traditional hydraulic braking system, and combines the drive motor in the vehicle with a reasonable and reliable design of the control software to realize braking energy recovery. Recycle.

[0010] figure 1 Shown is the schematic diagram of the traditional hydraulic braking system. The traditional hydraulic braking system includes a brake pedal 1, a vacuum booster 2, a fluid storage chamber 3, a brake master cylinder 4, a high-pressure damper 5, 6, a one-way valve 7, 8, 9, 10, low pressure accumulator 11, 12, switch solenoid valve 13, 14, 15, 16, 17, 18, ABS motor 19. Wherein, the liquid storage chamber 3 supplies oil for the brake master cylinder 4, and two brake pipelines are drawn from the two outlets of the brake master cyli...

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Abstract

The invention discloses a hydraulic braking system of a four-wheel driven electric vehicle. Based on the conventional hydraulic braking system, the system has the following characteristics that: 1, a selector valve and a master cylinder brake pressure sensor are arranged in front of a high-pressure damper on a brake pipeline led out of a master brake pump, a pipeline is connected from an outlet of the selector valve, and a medium pressure energy accumulator is arranged; another selector valve is arranged in front of the high-pressure damper on another brake pipeline, a pipeline is connected from the outlet of the selector valve, and a medium pressure energy accumulator is arranged; 2, two pipelines are led out of a liquid storage chamber and communicated with two one-way valves, and a switching electromagnetic valve is arranged on the pipeline; and 3, a wheel cylinder brake pressure sensor is connected at a left front wheel cylinder and a right rear wheel cylinder respectively. The system can ensure the same feeling of brake pedal as that of the conventional hydraulic braking system; the braking energy recovery efficiency reaches the maximum; and an ABS function can also be realized; and the driving safety is ensured and the driving range of an electrically-propelled vehicle is widened.

Description

technical field [0001] The invention relates to a hydraulic braking system of a vehicle, specifically, a hydraulic braking system with a braking energy recovery function for a four-wheel drive hybrid vehicle and a pure electric vehicle. 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 technology of batteries, the overall design of electric vehicles sho...

Claims

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Application Information

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IPC IPC(8): B60T13/68B60T13/52
Inventor 张俊智张彪李守波伍令飞
Owner TSINGHUA UNIV
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