Patent · US Expired

Electrohydraulic valve controller

US6892683B2 · kind B2 · utility

1Cited by

4References

18Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Udo Diehl · Stuttgart, DE
Uwe Hammer · Hemmingen, DE
Volker Beuche · Stuttgart, DE
Peter Lang · Gelnhausen, DE
Stefan Reimer · Markgröningen, DE

Key dates

Filing date	May 18, 2002
Grant date	May 17, 2005
Priority date	—
Expiry date	Jun 11, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L2820/02
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to an electrohydraulic valve controller for controlling a gas exchange valve in internal combustion engines, having a hydraulically actuatable control valve including a control valve piston which can be acted upon, via electrically actuatable valves, by a hydraulic medium that is under pressure, and a hydraulically acting valve brake is assigned to the control valve piston. The valve brake (46) includes a temperature compensation for the hydraulic medium.

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