Patent · US Expired

Hydraulic camshaft adjuster for an internal combustion engine

US7025023B2 · kind B2 · utility

17Cited by

4References

10Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Kai Lehmann · Ludwigsfelde, DE
Jens-Uwe Plank · Berlin, DE
Jorg Rosener · Berlin, DE
Holger Rudzinski · Berlin, DE

Key dates

Filing date	Oct 6, 2004
Grant date	Apr 11, 2006
Priority date	—
Expiry date	Oct 6, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/2102
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a hydraulic camshaft adjuster for an internal combustion engine including a hydraulic operating unit for adjusting the angular position of the camshaft relative to a camshaft drive by way of a hydraulic control valve with a valve housing in which a control piston is disposed for controlling the supply of hydraulic fluid to, and its removal from, the hydraulic operating unit and to which hydraulic fluid is supplied from the camshaft by way of a pressure channel which is formed into the valve housing so as to extend along the outer surface thereof and a sleeve tightly surrounds at least the part of the valve housing which includes the channel for tightly covering the channel.

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