Title:
ELECTRONICALLY CONTROLLED HYDRAULIC SYSTEM OF HYDRAULIC SUSPENSION DEVICE, TRACTOR AND ACTIVE DAMPING CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2021/244031
Kind Code:
A1
Abstract:
Disclosed is an electronically controlled hydraulic system of a hydraulic suspension device. The system comprises: a first overflow pressure-maintaining branch oil circuit and a second overflow pressure-maintaining branch oil circuit are arranged between a first working oil circuit and a second working oil circuit, and the first overflow pressure-maintaining branch oil circuit and the second overflow pressure-maintaining branch oil circuit are provided with an electronically controlled switching valve (212); the first overflow pressure-maintaining branch oil circuit comprises a first overflow pressure-maintaining valve (213), and the opening pressure of the first overflow pressure-maintaining valve (213) is not less than the pressure of a hitched agricultural implement on a first working oil port when an electronically controlled hydraulic valve is in a neutral state; and the second overflow pressure-maintaining branch oil circuit comprises a second overflow pressure-maintaining valve (216). Also disclosed are a tractor using the system and a control method for actively damping a hitched agricultural implement by using the system, which may reduce the requirement for the responsiveness of an electronic control unit and the electronically controlled hydraulic valve and improves the active damping effect on the hitched agricultural implement.
Inventors:
WANG LIFENG (CN)
WU BEIBEI (CN)
LI WUHAI (CN)
WU BEIBEI (CN)
LI WUHAI (CN)
Application Number:
PCT/CN2021/070621
Publication Date:
December 09, 2021
Filing Date:
January 07, 2021
Export Citation:
Assignee:
BODING JINGGONG INTELLIGENT TECH SHANDONG CO LTD (CN)
International Classes:
F15B11/08
Domestic Patent References:
| WO2011105027A1 | 2011-09-01 |
Foreign References:
| CN111520367A | 2020-08-11 | |||
| CN210565406U | 2020-05-19 | |||
| CN107642514A | 2018-01-30 | |||
| CN106870480A | 2017-06-20 | |||
| EP1754836A2 | 2007-02-21 |
Attorney, Agent or Firm:
WEIFANG ZHENGXIN ZHIYUAN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
Download PDF: