COMBUSTION ENGINE

摘要

A combustion engine includes a cylinder head including a controllable engine valve configured to open/close a combustion chamber in the combustion engine, a valve actuator operatively connected with and configured to displace the engine valve, and a closed pressure fluid circuit, wherein the valve actuator is arranged in the closed pressure fluid circuit. The combustion engine includes a cylinder head chamber that is included in the closed pressure fluid circuit and that is delimited by the cylinder head and a cylinder head mantle, by the valve actuator including a pneumatic pressure fluid circuit with an outlet opening that is in fluid communication with the cylinder head chamber, and by the cylinder head chamber including a hydraulic liquid drainage valve, wherein a drainage conduit stretches from the hydraulic liquid drainage valve to a hydraulic liquid vessel of the combustion engine for draining hydraulic

主权项

1. A combustion engine comprising
a cylinder head (6) that comprises a controllable engine valve (8) configured to open/close a combustion chamber (7) included in the combustion engine (1), a valve actuator (10) that is operatively connected to and configured to displace said engine valve (8), and a closed pressure fluid circuit, wherein said valve actuator (10) is arranged in said closed pressure fluid circuit, said combustion engine (1) further comprising a cylinder head chamber (13) that is included in said closed pressure fluid circuit and that is delimited by said cylinder head (6) and a cylinder head mantle (14), by the valve actuator (10) comprising a pneumatic pressure fluid circuit configured to operate the valve actuator (10) to displace the controllable engine valve (8) and comprising an outlet opening (12) for pressure fluid, which outlet opening (12) is in fluid communication with said cylinder head chamber (13), and by the cylinder head chamber (13) comprising a hydraulic liquid drainage valve (36), wherein a drainage conduit (37) stretches from the hydraulic liquid drainage valve (36) to a hydraulic liquid vessel (38) of the combustion engine (1) for draining away hydraulic liquid accumulated in the cylinder head chamber (13).