Patent ID: 7913665
Filing Date: 2011-03-29
Classification: F02B,F02M,Y02T

Abstract:
1. An internal combustion engine comprising: a cylinder that receives a piston and defines a combustion chamber; a plurality of intake ports, each of which conducts intake air and has: a plurality of intake valves, each of which is provided to a corresponding one of the plurality of intake ports, wherein each intake valve is seatable against the valve seat of the opening to close the opening in a close position thereof and is liftable from the valve seat of the opening to open the opening in an open position thereof; and a plurality of fuel injection valves, each of which is provided to a corresponding one of the plurality of intake ports to inject and thereby to supply fuel into the combustion chamber along the intake air through the curved portion and the opening of the corresponding intake port, wherein: an injection axis of each fuel injection valve intersects with a surface of the corresponding intake valve placed in the close position at an intersecting point, which is radially outward of a central axis of the corresponding intake valve and radially inward of an inner peripheral wall surface of the corresponding intake port in a radial direction of the opening of the corresponding intake port and is located on an upstream side, with respect to a flow direction of intake air in the corresponding intake port, of the central axis of the corresponding intake valve; and the curved portion of each intake port includes a concavely curved inner peripheral wall surface, which is located on a downstream side of the central axis of the corresponding intake valve.