Patent · US Expired

Valve gear of an internal-combustion engine

US5950583A · kind A · utility

12Cited by

9References

12Claims

0Family size

Assignee

Dr. Ing. h.c. F. Porsche AG · DE

Inventors

Dieter Kraxner · Wurmberg, DE
Dietmar Schwarzenthal · Ditzingen, DE
Joachim Gruenberger · Sachsenheim, DE

Key dates

Filing date	Apr 27, 1998
Grant date	Sep 14, 1999
Priority date	—
Expiry date	Apr 27, 2018

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L13/0036
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An internal-combustion engine valve gear has at least two adjacent stroke transmitting elements which, by way of a hydraulically displaceable coupling element, in a coupled position can be displaced with respect to one another and, in the uncoupled position, can be displaced independently of one another. The stroke transmitting elements interact with the cam of a camshaft having different cam paths which interact with different stroke courses with the stroke transmitting elements. In order to avoid undefined switching conditions in the operation of the internal-combustion engine and, during each switching operation have sufficient time for the displacement of the coupling element, this coupling element interacts with a locking element which locks and unlocks the coupling element as a function of the cam path.

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