| 摘要 |
A variable valve drive ( 1 ) of an internal combustion engine is provided which is used to actuate a gas exchange valve ( 5 ). Displacement thereof takes place via a cam ( 7 ) generated lift and via a lift generated by a piston ( 14, 32 ) of a hydraulic force applying device ( 4 a, 4 b), which is superimposed on the cam lift and which is independent thereof. The hydraulic force applying device is connected to a hydraulic fluid line (S-P) which provides an adjustable hydraulic pressure medium and includes a pressure chamber ( 24 a, 24 b) which is limited on one side by the piston ( 14, 32 ), in addition to a hydraulic valve lash compensation device ( 23 a, 23 b) which includes a working chamber ( 22 a, 22 b) which is radially defined by a housing ( 13 a, 13 b). The housing ( 13 a, 13 b) is also used to radially define the pressure chamber ( 24 a, 24 b).
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