Mazda Motor Corporation

Tadatomo Toda

Takashi Youso

Kazuhiro Nagatsu

Masayuki Furutani

Mitsunori Wasada

Keiichi Kamimura

Tadasu Hashiguchi

Seiji Namba

An accessory support structure for a vehicle engine includes a pair of accessory-side supports provided on the engine accessory, and a pair of engine-side supports provided on the engine body. The engine-side supports each have a shaft hole into which a bolt is inserted, a slot closer to the engine body than the shaft hole is, and extending substantially horizontally, and an intermediate portion interposed between the shaft hole and the slot to restrict movement of the bolt. The engine-side supports each remove a restriction imposed by the intermediate portion and guide the bolt from the shaft hole to the slot if an external force acting on the alternator toward the engine body exceeds a predetermined threshold.

Accessory support structure for vehicle engine

The axial line of an intake valve is inclined, and a gap between a piston crown surface and a valve head of the intake valve expands in accordance with the approach of the crankshaft axis. A relationship of G&#x3e;Gis fulfilled, where Gstands for a minimum gap between the lower surface of the cylinder head that is positioned between the intake valve and the exhaust valve facing the intake valve, with the crankshaft axis being interposed therebetween, and the piston crown surface in a top dead center, and Gstands for a gap at a position that is the closest to the crankshaft axis, from among the gaps between the lower surface of the valve head of the intake valve and the piston crown surface at a center timing of a valve overlap period in which the intake valve and the exhaust valve are both open.

Combustion chamber structure for engine

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Hiroshima, Japan

Tadatomo Toda