Internal combustion engine

Abstract

Disclosed herein is an internal combustion engine having a plurality of cylinders, a crankcase, a cylinder head and a cylinder-head cover, the cylinder head being formed from a cylinder-head lower part and a camshaft housing which is positioned between the cylinder-head cover and the cylinder-head lower part, and at least one camshaft and one sliding cam which can be displaced axially on the camshaft and has a slotted-guide section being provided for actuating gas exchange valves of the internal combustion engine, an actuator with an actuable pin being provided for bringing about an axial displacement of the sliding cam. The camshaft and the sliding cam are positioned in the camshaft housing. The camshaft, which is mounted rotatably for valve actuation, is arranged with the axially displaceable sliding cam in the camshaft housing in such a way that they can be attached to the cylinder-head lower part as one preassembled unit.

1 .- 9 . (canceled) 
     
     
         10 . An internal combustion engine comprising:
 a plurality of cylinders, a crankcase, a cylinder head and a cylinder-head cover, the cylinder head being formed from a cylinder-head lower part and a camshaft housing which is positioned between the cylinder-head cover and the cylinder-head lower part, and   at least one camshaft;   at least one sliding cam which is configured to be displaced axially on the at least one camshaft and has a slotted-guide section for actuating gas exchange valves of the internal combustion engine; and   at least one actuator with an actuable pin for bringing about an axial displacement of the at least one sliding cam;   wherein the camshaft and the sliding cam are positioned in the camshaft housing,   wherein the camshaft, which is mounted rotatably for valve actuation, is configured to be assembled with the axially displaceable sliding cam in the camshaft housing in such a way that the camshaft, the sliding cam and the camshaft housing form one preassembled unit which is configured to be attached to the cylinder-head lower part.   
     
     
         11 . The internal combustion engine as claimed in  claim 10 , wherein the actuator which is provided for bringing about the axial displacement of the sliding cam is arranged in a lateral region of the camshaft housing. 
     
     
         12 . The internal combustion engine as claimed in  claim 10 , wherein the camshaft housing includes a plurality of laterally positioned openings for receiving the actuator. 
     
     
         13 . The internal combustion engine as claimed in  claim 10 , wherein each sliding cam is assigned an individual actuator per cylinder for the actuation of inlet-side gas exchange valves or outlet-side gas exchange valves, the sliding cam and the actuator being positioned in the camshaft housing spatially between two bearing points of the camshaft. 
     
     
         14 . The internal combustion engine as claimed in  claim 10 , wherein at least two gas exchange valves are configured to be actuated by way of one sliding cam, wherein the slotted-guide section that is arranged on the sliding cam is positioned between two cam sections which, in each case, serve for actuating the gas exchange valves and, in each case, have a plurality of cam tracks. 
     
     
         15 . The internal combustion engine as claimed in  claim 10 , wherein a camshaft adjusting device and/or at least one drive wheel are/is attached at one end of the camshaft. 
     
     
         16 . The internal combustion engine as claimed in  claim 15 , wherein the camshaft adjusting device and the drive wheel are connected to the camshaft and are arranged in the camshaft housing in order to form a part of the preassembled unit. 
     
     
         17 . The internal combustion engine as claimed in  claim 15 , wherein the camshaft adjusting device is driven electrically. 
     
     
         18 . The internal combustion engine as claimed in  claim 10 , wherein the camshaft housing has a plurality of bearing devices for mounting a plurality of camshafts, which bearing devices are configured in one piece with the camshaft housing.