Combustion engine with overhead camshafts

Abstract

A combustion engine is provided with overhead camshafts. The camshafts are mounted in bearings. The cylinder head with camshafts is fixed on a cylinder block via cylinder head screws. Bearing caps are fixed on the cylinder head via bearing cap screws. Each bearing cap comprises three openings for bearing cap screws and additionally a fourth opening for a cylinder head screw.

1 . A combustion engine, comprising:
 a plurality of bearings;   overhead camshafts mounted in the plurality of bearings   a cylinder block;   a plurality of cylinder head screws;   a cylinder head with the overhead camshafts attached to the cylinder block with the plurality of cylinder head screws;   a plurality of bearing cap screws; and   a plurality of bearing caps that are fixed on the cylinder head with the plurality of bearing cap screws,   wherein each bearing cap of the plurality of bearing caps comprise three openings for the plurality of bearing cap screws and s fourth opening for at least one of the plurality of cylinder head screws.   
     
     
         2 . The combustion engine according to  claim 1 , wherein the plurality of bearings of the overhead camshafts each comprise a lower bearing half shell as an integral part of the cylinder head. 
     
     
         3 . The combustion engine according to  claim 1 , wherein the plurality of bearings of the overhead camshafts comprise an upper bearing half shell as an integral part of the plurality of bearing caps. 
     
     
         4 . The combustion engine according to  claim 1 , wherein on a first end of the bearing cap, a first opening for a first bearing cap screw is arranged and located opposite on a second end of the bearing cap, a second opening and a third opening for two bearing caps screws of the plurality of bearing cap screws and the fourth opening arranged between the second opening and the third opening. 
     
     
         5 . The combustion engine according to  claim 4 ,
 wherein a plurality of openings are Y-shape arranged in the bearing cap,   wherein the first end is configured to form a foot of the Y-shape with the first bearing cap screw,   wherein the second opening and the third opening are arranged on ends of the Y-shape, and   wherein the fourth opening is provided in a branching position of the Y-shape.   
     
     
         6 . The combustion engine according to  claim 1 , wherein a first three openings of a plurality of openings have a substantially same diameter and the fourth opening has a greater diameter than the substantially same diameter. 
     
     
         7 . The combustion engine according to  claim 6 , wherein the first three openings of the plurality of openings comprise an inner diameter configured for a shank of M5 screws. 
     
     
         8 . The combustion engine according to  claim 6 , wherein the first three openings of the plurality of openings comprise an inner diameter configured for a shank of M6 screws. 
     
     
         9 . The combustion engine according to  claim 1 , wherein the fourth opening comprises an inner diameter that is adapted to a head of a cylinder head screw with an internal tool engagement in the cylinder head screw. 
     
     
         10 . The combustion engine according to  claim 9 , wherein the plurality of bearing cap screws and the cylinder head screw are aligned substantially parallel and at a right angle to axes of the overhead camshafts. 
     
     
         11 . The combustion engine according to  claim 1 , wherein a first camshaft each for inlet valves and a second camshaft for exhaust valves aligned parallel to the first camshaft are arranged and assembled as a cylinder head unit on the cylinder head. 
     
     
         12 . The combustion engine according to  claim 11 ,
 wherein each two inlet valves and two exhaust valves are provided for each cylinder of the cylinder block, and   wherein two cams are arranged next to each other camshafts between two bearing caps.   
     
     
         13 . The combustion engine according to  claim 1 , further comprising sliding cams on camshafts between two bearing caps.