Patent · US Active

Valve drive of an internal combustion engine

US8056520B2 · kind B2 · utility

2Cited by

3References

11Claims

0Family size

Assignee

Schaeffler KG · DE

Inventors

Harald Elendt · Meckenheim, DE
Andreas Nendel · Prüm, DE

Key dates

Filing date	Feb 19, 2008
Grant date	Nov 15, 2011
Priority date	—
Expiry date	Nov 10, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2013/0094
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A valve drive of an internal combustion engine, which has a reciprocating poppet valve and a spring element which impinges the closed reciprocating poppet valve with force against the action of a valve seat. The force characteristics are substantially independent of the lift characteristics of the reciprocating poppet valve. The spring element is part of a snap-in locking device, which is stationarily mounted in the engine and surrounds the valve stem of the reciprocating poppet valve. The snap-in locking device has snap-in elements arranged in the power flux between the spring element and reciprocating poppet valve. The snap-in elements are supported in the direction of closure of the reciprocating poppet valve on a snap-in surface of the valve stem when the reciprocating poppet valve is closed and on a snap-in surface of the snap-in locking device when the reciprocating poppet valve is open.

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