| 主权项 |
1. An applied-ignition internal combustion engine comprising:
at least one cylinder head with at least one cylinder, each cylinder having at least two inlet openings for the supply of fresh air via an intake system and/or at least two outlet openings for the discharge of the exhaust gases via an exhaust-gas discharge system, a pump for delivering engine oil, the pump serving for supplying engine oil to the internal combustion engine, thus forming an oil circuit, and at least two at least partially variable valve drives having at least two valves which are movable between a valve closed position and a valve open position in order to open up and block the at least two inlet or outlet openings of a cylinder, having valve spring means for preloading the valves in the direction of the valve closed position, and having at least two hydraulically adjustable actuating devices for opening the valves counter to the preload force of the valve spring means, each actuating device comprising a cam which is arranged on a camshaft and which, as the camshaft rotates, can be brought into engagement with at least one cam follower element, whereby the associated valve can be actuated,
wherein each hydraulically adjustable actuating device can be charged with pressurized oil via an oil pressure line which branches off from the oil circuit, there being arranged in the oil pressure line a controllable shut-off element which blocks or opens up the oil pressure line), andthe cams of the at least two hydraulically adjustable actuating devices of the at least two at least partially variable valve drives are rotatable. |
