Parallel type hydraulic braking energy recovery system

A technology of hydraulic braking and energy recovery, applied in the direction of brakes, braking components, control devices, etc., can solve the problems of low energy recovery efficiency, limited braking torque, low initial pressure of accumulator, etc., and achieve the solution of braking Low efficiency, the effect of meeting the braking demand

Pending Publication Date: 2019-03-26
ZHEJIANG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

The traditional hydraulic braking energy recovery system only uses one accumulator as the energy storage unit. In order to ensure that the accumulator has sufficient energy storage, the initial pressure of the accumulator is low. When the braking intensity of the vehicle is high, the hydraulic braking energy The braking torque provided by the recovery system is limited, and the energy recovery efficiency is not high

Method used

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  • Parallel type hydraulic braking energy recovery system

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Embodiment Construction

[0012] Further illustrate the present invention below in conjunction with accompanying drawing

[0013] Refer to the accompanying drawings in the manual:

[0014] The braking energy recovery system includes: a high-pressure accumulator 1, a pressure sensor 2, a first pilot pressure control valve 3, a relief valve 4, a hydraulic cylinder 5, a medium-pressure accumulator 6, and a second pilot pressure control valve 7 , low-pressure accumulator 8, pressure sensor 9, third pilot pressure control valve 10, three-position four-way reversing valve 11, friction brake 12, transmission shaft 13, secondary element pump / motor 14, torque sensor 15, electromagnetic clutch 16, torque coupler 17, gearbox 18, engine 19.

[0015] When the car brakes, the driver steps on the brake pedal, and the controller collects the corresponding analog signal to judge the braking condition. When the braking intensity is high, the controller outputs a corresponding digital signal, the clutch 16 is engaged, ...

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Abstract

The invention provides a parallel type hydraulic braking energy recovery system. Three energy accumulators with different initial pressures are used as accumulators; and the three energy accumulatorsare in a parallel state. During braking, the energy accumulators are selected according to different working conditions; when the braking strength of a vehicle is high, the high pressure energy accumulator works, and one part with insufficient braking force is supplemented by a friction brake; when the regenerative braking moment, which can be provided by the high pressure energy accumulator, reaches a required vehicle braking moment, the high pressure energy accumulator is closed, and the middle pressure energy accumulator begins to work; and when the braking strength of the vehicle is low, the low pressure energy accumulator works, and a desired braking moment of the vehicle is provided by the hydraulic braking energy recovery system.

Description

technical field [0001] The invention relates to a hydraulic braking energy recovery system for automobiles. Background technique [0002] In recent years, the number of automobiles in my country has continued to grow, and the resulting energy crisis and environmental protection issues have become increasingly severe. How to improve the energy utilization efficiency of automobiles has become a hot spot in current research. [0003] Under urban working conditions, 1 / 3 to 2 / 5 of the energy loss of traditional cars is in the braking process, and the recovery and utilization of braking energy can effectively improve the energy utilization efficiency of the car. Parallel hydraulic braking energy recovery technology uses airbag accumulator as the energy recovery unit, which has the characteristics of high energy transfer efficiency and high energy density, and can realize braking energy recovery and release in a short time, reducing vehicle energy consumption. [0004] Studies ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T1/10B60K25/00
CPCB60T1/10B60K25/00
Inventor 宁晓斌许高伦付志军上官佳荣李宁
Owner ZHEJIANG UNIV OF TECH
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