Patent · US Active

Valve gear for load change valves of four-stroke internal combustion engines

US7412951B2 · kind B2 · utility

0Cited by

2References

6Claims

0Family size

Assignee

IAV GmbH Ingenieurgesellschaft Auto und Verkehr · DE

Inventors

Andreas Werler · Zwickau, DE
Jörg Wutzler · Zwickau, DE

Key dates

Filing date	Jul 27, 2006
Grant date	Aug 19, 2008
Priority date	—
Expiry date	May 2, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2305/00
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

Valve gears for load-change valves of four-stroke internal combustion engines, in which the load-change valves are closed by spring force, engage a pivot lever moved by a cam for opening a load-change channel. The cam engages an intermediate element that it is additionally moved by the lifting curve of the cam during a different work cycle, and adjusts the pivot lever to open the load-change valve slightly during a different work cycle. The intermediate element is prismatically guided on an element that can pivot in the cylinder head and is adjustable in its position, and engages the cam and the pivot lever, so that the stroke movement of the cam for opening the load-change valve via the pivot lever can be adjusted.

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