Patent · US Expired

Device for altering the opening and closing times of gas-exchange valves of an internal-combustion engine

US6105544A · kind A · utility

0Cited by

2References

12Claims

0Family size

Assignee

INA Wälzlager Schaeffler oHG · DE

Inventors

Jochen Auchter · Weisendorf, DE
Mike Kohrs · Wilthen, DE
Andreas Strauss · Forchheim, DE

Key dates

Filing date	Jan 26, 1999
Grant date	Aug 22, 2000
Priority date	—
Expiry date	Jan 26, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/2102
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An apparatus (1) for changing the opening and closing times of gas exchange valves of an internal combustion engine has intercommunicating slide and freewheel means (15, 20). By means of these elements (15, 20), immediately upon starting the internal combustion engine, and adjusting piston (7) of the apparatus (1) is moved into its desired starting position and/or held there long enough for the apparatus (1) to be filled sufficiently with hydraulic fluid again. During the hydraulic-fluid-free state, the adjusting piston (7) is at the same time largely prevented from making any undesired oscillations.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.