Patent · US Active

Valve drive for activation of gas exchange valves of internal combustion engines

US8596235B2 · kind B2 · utility

2Cited by

12References

8Claims

0Family size

Assignee

IAV GmbH Ingenieurgesellschaft Auto und Verkehr · DE

Inventors

Thomas Arnold · Winslow, US
Andreas Werler · Zwickau, DE
Joerg Wutzler · Zwickau, DE

Key dates

Filing date	Jan 24, 2011
Grant date	Dec 3, 2013
Priority date	—
Expiry date	Nov 18, 2031

Classification

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

Abstract

A variable valve drive for internal combustion engines is used for activation of gas exchange valves, in which the gas exchange valves engage different cam profiles of a camshaft driven by the crankshaft of the internal combustion engine. The camshaft has at least one displaceable cam segment that carries multiple different cam profiles having the same base circle section. Each one of the cam profiles is switched to be active for the related gas exchange valve, in accordance with the axial position of the cam segment relative to at least one related gas exchange valve. The axial positioning of the cam segment takes place by a setting shaft that can be rotated and is disposed parallel and next to the camshaft. The setting shaft has a guide track in which a tappet is guided, which acts on a transfer element that determines the axial position of the cam segment.

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