ACTIVE-PASSIVE DUAL MODE SWITCHABLE VEHICLE SUSPENSION SYSTEM AND SWITCHING METHOD THEREFOR

Title:

ACTIVE-PASSIVE DUAL MODE SWITCHABLE VEHICLE SUSPENSION SYSTEM AND SWITCHING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2021/023026

Kind Code:

A1

Abstract:

An active-passive dual mode switchable vehicle suspension system. The system comprises a filter (1), a hydraulic pump (2), a check valve (3), a power takeoff (4), a servo valve (6), a suspension cylinder (7), a overflow valve (9), an energy accumulator (10), a reversing valve (11), a first pressure sensor (12), a second pressure sensor (13), a controller (14), a fuel tank (15) and a displacement sensor (16). Further related is a switching method for the active-passive dual mode switchable vehicle suspension system. When switching the mode, the fuel hydraulic pressure in the rodless cavity of the suspension cylinder is adjusted in advance to be equal to the fuel hydraulic pressure in the energy accumulator, a stable switching between active and passive suspension modes is thus achieved so as to eliminate oscillation of the vehicle body during the existing switching between active and passive suspension systems. Moreover, the energy accumulator and the overflow valve can be shared in active and passive suspension modes, thereby effectively decreasing the usage amount of energy accumulators and overflow valves, greatly saving the space of the vehicle body, effectively reducing the gross mass of the vehicle body and facilitating the light weight of the vehicle chassis.

Inventors:

ZHAO DINGXUAN (CN)
GONG MINGDE (CN)
LIU SHUANG (CN)
ZHANG ZHUXIN (CN)
SUN ZHIGUO (CN)
NI TAO (CN)
YAN ZHAOYANG (CN)
GUO QINGHE (CN)

Application Number:

PCT/CN2020/104512

Publication Date:

February 11, 2021

Filing Date:

July 24, 2020

Export Citation:

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Assignee:

UNIV YANSHAN (CN)

International Classes:

B60G17/015; B60G17/018; B60G17/08

Foreign References:

CN110497760A	2019-11-26
CN109050192A	2018-12-21
CN102059929A	2011-05-18
CN206344652U	2017-07-21
CN104999881A	2015-10-28
CN101844498A	2010-09-29
US5195772A	1993-03-23
US5188390A	1993-02-23

Other References: