Patent ID: 7673609
Filing Date: 2010-03-09
Classification: F01L,F02F

Abstract:
1. An air-intake structure of an internal combustion engine comprising: air-intake valves supported by a cylinder head having integrally formed air-intake ports so as to reciprocate in parallel with the direction of reciprocal motion of pistons, exhaust valves supported by the cylinder head having integrally formed exhaust ports so as not to reciprocate in parallel with the direction of reciprocal motion of pistons; at least one ignition plug secured into an insertion hole of the cylinder head, the insertion hole extending in a direction that is substantially parallel to axes of the exhaust valves, and fuel injection devices formed integrally with a throttle body are provided on intake manifolds to be connected to the air-intake ports, wherein the air-intake ports extending toward the cylinder head cover along a recess formed on the outer surface of the cylinder head are connected to the intake manifolds at positions just before reaching the identical plane to a mating surface between the cylinder head and the cylinder head cover.