Patent · US Active

Hydraulic unit for a cylinder head of an internal combustion engine with hydraulic, variable valve train

US8020526B2 · kind B2 · utility

2Cited by

1References

8Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Martin Rauch · Bamberg, DE
Markus Proschko · Baudenbach, DE

Key dates

Filing date	Nov 14, 2008
Grant date	Sep 20, 2011
Priority date	—
Expiry date	Dec 7, 2029

Classification

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

Abstract

A hydraulic unit (5) for a cylinder head (2) of an internal combustion engine with a hydraulic, variable valve train (1) is provided. In the hydraulic unit, a high-pressure chamber (11), a medium-pressure chamber (12), and also a low-pressure chamber (16) used as a hydraulic medium reservoir are formed. The low-pressure chamber communicates merely via a choke opening (17) with the medium-pressure chamber, wherein the choke opening passes through a separating wall (18) extending between the low-pressure chamber and the medium-pressure chamber.

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