Title:
FULLY VARIABLE ELECTRO-HYDRAULIC VALVE SYSTEM HAVING BUFFERING FUNCTION
Document Type and Number:
WIPO Patent Application WO/2021/136225
Kind Code:
A1
Abstract:
A fully variable electro-hydraulic valve system having a buffering function, comprising a camshaft (101), a valve assembly (106), a sliding sleeve (103), a spiral shaft (102), a piston (105), and a reset spring (104); the sliding sleeve (103) is fixed relative to an engine; the piston (105) abuts the valve assembly (106); the spiral shaft (102) is controlled by a cam surface of the camshaft (101) in the axial direction; a spiral surface (102E) is provided at a first end of the spiral shaft (102), and a control gear (102A) is provided at a second end thereof; and the sliding sleeve (103) is provided with a buffering oil hole (123) that communicates with a buffering cavity (R), and the buffering oil hole (123) communicates with a low-pressure oil passage of the engine by means of a throttling device (124). When a valve is going to be seated, the piston (105) firstly collides with a buffering ring (121); due to the effect of the throttling device (124), engine oil within the buffering cavity (R) has a damping effect on the movement of the buffering ring (121), such that the valve is slowly seated, thus reducing the impact damage caused to the air valve and a sealing surface of a valve seat, thereby effectively prolonging the usage service life of a valve mechanism.
Inventors:
WANG LIFENG (CN)
WANG XIUQIANG (CN)
WANG XIUQIANG (CN)
Application Number:
PCT/CN2020/140573
Publication Date:
July 08, 2021
Filing Date:
December 29, 2020
Export Citation:
Assignee:
WEIFANG LICHUANG ELECTRONIC TECH CO LTD (CN)
International Classes:
F01L9/14; F01L9/10; F01L9/16; F01L9/20; F01L9/40; F01L13/00
Foreign References:
| CN110985156A | 2020-04-10 | |||
| CN211343050U | 2020-08-25 | |||
| CN111075531A | 2020-04-28 | |||
| CN111206973A | 2020-05-29 | |||
| CN110486110A | 2019-11-22 | |||
| CN209053651U | 2019-07-02 | |||
| CN108798820A | 2018-11-13 | |||
| US20120048222A1 | 2012-03-01 | |||
| CN105604625A | 2016-05-25 | |||
| CN108590799A | 2018-09-28 |
Attorney, Agent or Firm:
WEIFANG ZHENGXIN ZHIYUAN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
Download PDF: