Fuel injection engine and motorcycle comprising fuel...

Details Fuel injection engine and motorcycle comprising fuel... Fuel injection engine and motorcycle comprising fuel...

2006-10-24

2010-06-29

Cronin, Stephen K (Department: 3747)

Internal-combustion engines

Cooling

With jacketed head and/or cylinder

C123S472000, C123S445000

Reexamination Certificate

active

07743741

ABSTRACT:
An air fuel injection engine including an air-intake passage configured to guide air taken in from outside to a combustion chamber formed by a cylinder block and a cylinder head, a fuel injector configured to inject fuel to an interior of the air-intake passage, and a water jacket through which cooling water flows to cool the air-intake passage. As viewed in a plane crossing an air flow direction in the air-intake passage and passing through a predetermined region of an inner wall of the air-intake passage, the predetermined region including a crossing point at which a fuel injection center line of the fuel injected from the fuel injector crosses the inner wall of the air-intake passage, the water jacket is configured to extend away from the crossing point along a circumferential direction of the air-intake passage, from a region near the predetermined region.

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