Patent · US Expired

Camshaft adjustment control device

US6971353B2 · kind B2 · utility

25Cited by

4References

7Claims

0Family size

Assignee

Daimlerchrysler AG · US

Inventors

Matthias Heinze · Berlin, DE
Kai Lehmann · Ludwigsfelde, DE
Jens-Uwe Plank · Berlin, DE
Jorg Rosener · Berlin, DE

Key dates

Filing date	Jul 23, 2004
Grant date	Dec 6, 2005
Priority date	—
Expiry date	Jul 23, 2024

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2820/041
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a camshaft adjustment control device for an internal combustion engine arranged in the drive train for a camshaft, with an inner body connected to the camshaft and an outer body rotatable relative to the inner body, and a control space between the inner and the outer bodies to which hydraulic fluid can be supplied for adjusting the relative angular positions of the inner body connected to the camshaft and the outer body driven by the crankshaft, the inner body is mounted to the camshaft by a bolt having a central bore in which a control spool valve is disposed controlling the flow of fluid to and from the control space and a check valve is arranged in the supply lines of the hydraulic fluid to the control spool valve which check valve opens when a certain pressure is applied thereto.

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