Patent · US Active

Camshaft with variable valve opening period

US8820281B2 · kind B2 · utility

4Cited by

9References

10Claims

0Family size

Assignee

THYSSENKRUPP PRESTA TECCENTER AG · LI

Inventors

Uwe Dietel · Lichtentanne, DE
Uwe Grossgebauer · Dresden, DE
Jürgen Meusel · Kitzscher, DE
Bernd Mann · Lengefeld, DE

Key dates

Filing date	Aug 24, 2010
Grant date	Sep 2, 2014
Priority date	—
Expiry date	Nov 5, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2013/0089
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A camshaft for an internal combustion engine, having a hollow outer shaft and an inner shaft which is concentrically mounted inside the outer shaft to be rotatable about an angle and a multi-part cam element having a first cam section that is mounted on the outer shaft in a rotationally fixed manner and a second cam section that is connected to the inner shaft in a rotationally fixed manner and rotationally mounted on the outer shaft. The two cam sections have different cam contours, the relative movement of the two cam sections in opposite directions allowing the resulting cam contour of the cam element interacting with a cam follower to be changed to adjust the variable valve opening period. The two cam sections have different maximum lifts, the cam top section of the cam section having the smaller maximum lift being substantially formed by an annular sector.

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