| 摘要 |
The present invention relates to a four-stroke internal combustion engine having at least one cylinder head (112), at least one cylinder (114) and a piston (116) in each cylinder (114); the at least one cylinder head (112) having at least one intake valve (120) and at least one exhaust valve (124); the piston (116) having a piston crown (140) and a piston skirt (142) fastened to one another by means of screws (144); the piston crown (140) having a top surface (146) facing the cylinder head (112); the top surface (146) being rotationally symmetric and having a centre area (146'), a depressed bowl area (146'') and an edge area (146'''), wherein the centre area is a raised centre area (146') extending above the edge area (146'''). |
