Hydraulic unit for a cylinder head of a combustion engine with hydraulically variable gas exchange valve drive

摘要

The unit (5) has a drive-side master unit (6), a driven-side slave unit, a high-pressure chamber, a controllable hydraulic valve (10), a medium-pressure chamber (12) running into a housing bottom part (20). A throttle opening is formed as a part of a hydraulic medium channel passing via a housing middle part (21). The throttle opening runs into a flat housing seal (23) that is arranged as a separate component either between the bottom part or a housing top part (22) and the middle part. A section of the hydraulic medium channel passing via the middle part exhibits a low-throttle construction.