HYDRAULIC LASH SELF-ADJUSTING SPECIAL-USE DRIVE CAM COMBINATION-TYPE VALVE DRIVING DEVICE

Title:

HYDRAULIC LASH SELF-ADJUSTING SPECIAL-USE DRIVE CAM COMBINATION-TYPE VALVE DRIVING DEVICE

Document Type and Number:

WIPO Patent Application WO/2023/142279

Kind Code:

A1

Abstract:

A hydraulic lash self-adjusting special-use drive cam combination-type valve driving device, which comprises a driver (1) fixedly mounted on a rocker arm shaft (16) and a rocker arm (3) provided with a hydraulic lash adjuster (6); the driver (1) is provided with a master piston (4) and an actuation piston (7); a drive oil path (8) is arranged between a master piston hole (1-1) and an actuation piston hole (1-3), and the drive oil path (8) is in communication with an oil supply path (17) by means of a positioning pressure control unit (9); the master piston (4) and a secondary piston (5) hydraulically jointly move when the drive oil path (17) supplies oil, and a drive valve (18) is opened. There is no wear from motion and no engine power consumption caused by friction from motion between the driver (1) and the rocker arm shaft (16), and the stability and reliability of operation is improved; when used, a valve lash does not need to be subsequently adjusted, a change in system clearance is prevented from affecting driving and positive work performance, engine noise is reduced and engine timing accuracy is improved, and the problem of mutual accommodation of a valve drive function and a hydraulic lash adjustment function is solved.

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Inventors:

CHUI LAP LAM (CN)

Application Number:

PCT/CN2022/089486

Publication Date:

August 03, 2023

Filing Date:

April 27, 2022

Export Citation:

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Assignee:

JIANGSU JOINTEK PREC MACHINERY CO LTD (CN)

International Classes:

F01L1/24; F01L1/12; F01L1/18; F01L1/245; F01L1/26

Foreign References:

CN114109551A	2022-03-01
CN113833544A	2021-12-24
CN102032014A	2011-04-27
CN113123843A	2021-07-16
DE102013215622A1	2015-02-12
US20160369659A1	2016-12-22

Attorney, Agent or Firm:

CHANGZHOU INNOVATION PATENT AGENCY (CN)

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