Patent · US Active

Control valve for a device to modify the timing of an internal combustion engine

US7487752B2 · kind B2 · utility

8Cited by

2References

5Claims

0Family size

Assignee

Schaeffler KG · DE

Inventors

Andreas Strauss · Forchheim, DE
Andreas Rohr · Idar-Oberstein, DE
Jens Hoppe · Erlangen, DE

Key dates

Filing date	Jul 18, 2005
Grant date	Feb 10, 2009
Priority date	—
Expiry date	Oct 13, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86622
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A control valve (18) for a device (1) to modify the timing of an internal combustion engine is provided. Here, a controlled rotation of the camshaft in reference to the crankshaft can be achieved via a hydraulic adjustment drive. A control valve (18) with operative connectors (A, B), a hydraulic connector (P), and at least one reservoir connector (T, T1, T2) controls the inflow of hydraulic fluid into and/or the outflow of hydraulic fluid out of the hydraulic adjustment drive. A filter (46) is arranged between the hydraulic connector (P) and the operative connectors (A, B).

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