Invention Grant
- Patent Title: Hydraulic unit for a cylinder head of an internal combustion engine with hydraulically variable gas-exchange valve train
- Patent Title (中): 具有液压可变气体换向阀列车的内燃机气缸盖的液压单元
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Application No.: US12718066Application Date: 2010-03-05
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Publication No.: US08210140B2Publication Date: 2012-07-03
- Inventor: Mario Kuhl , Andreas Eichenberg
- Applicant: Mario Kuhl , Andreas Eichenberg
- Applicant Address: DE Herzogenaurach
- Assignee: Schaeffler Technologies AG & Co. KG
- Current Assignee: Schaeffler Technologies AG & Co. KG
- Current Assignee Address: DE Herzogenaurach
- Agency: Volpe and Koenig, P.C.
- Priority: DE102009011982 20090305
- Main IPC: F01L9/02
- IPC: F01L9/02

Abstract:
A hydraulic unit (5) is provided for a cylinder head (2) of an internal combustion engine with a hydraulically variable gas-exchange valve train (1). In the hydraulic unit, a high-pressure chamber (11), a medium-pressure chamber (12), and a low-pressure chamber (16) used as the hydraulic medium reservoir are formed. The low-pressure chamber communicates via a throttle opening (17, 17′, 17″, 17′″) with the medium-pressure chamber, and the throttle opening extends through a housing seal (23) produced as a separate component.
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