Honda Motor Co., Ltd.

Tomokazu Nomura

Toru Kisaichi

Toshio Yamamoto

Ryuichi Abe

Masaaki Negoro

Takanori Osuka

Shuichi Ochiai

An internal combustion engine includes an intake passage structure. The engine is configured such that a cylinder head is formed integrally with an intake manifold portion. A cylinder central axis is oriented parallel to an extending direction of an intake passage, when viewed in a side view. An injector is arranged such that it does not interfere with peripheral components, including the intake passage and a throttle body. The injector is disposed in the intake manifold portion such that a leading end thereof is oriented towards the intake valve of the cylinder head. The intake passage on the upstream side of an injector attachment position is offset from the injector in a width-direction of the internal combustion engine.

Intake passage structure for internal combustion engine, and engine and vehicle incorporating same

A cooling water passage structure includes an engine having cylinder axes arranged in a V-shape centering on a crankshaft; water jackets formed in front and rear cylinder blocks and cylinder heads of the engine; a thermostat case having a portion formed integrally with the front and rear cylinder blocks in the V-bank of the front and rear cylinder blocks; a cooling water inlet side connecting portionconnecting a cooling water supply side line with a cooling water passage including the water jackets; and a cooling water outlet side connecting portion connecting a cooling water discharge side line with a cooling water passage including the water jackets. The thermostat case, the cooling water inlet side connecting portion, and the cooling water outlet side connecting portion are disposed at one end side of the engine in the direction of the crankshaft

Cooling water passage structure for engine

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Saitama, Japan

Tomokazu Nomura