Mazda Motor Corporation

Setsuo Harada

Hiroyuki Oda

Hirokazu Matsuura

Kouji Asanomi

Tsuyoshi Goto

Kouichi Hatamura

Hidesaku Ebesu

Hiroaki Deguchi

Ryoji Abe

Toshikazu Kurokawa

Shinji Seike

Kouji Asanoumi

Masayuki Saiki

A cylinder head includes a carrier member integrally formed with a vertical wall portion for supporting a camshaft a tappet guide for containing a tappet and a tappet-lubricating oil receiving portion slanted around the tappet guide An operation-oil supply passage extends in the longitudinal direction of the carrier member inside the tappet guide

Cylinder head structure

A valve drive mechanism includes a generally cylindrically shaped tappet assembly ( ) comprising a center tappet ( ) and a side tappet ( ). The center tappet ( ) has a circular-arcuate side walls ( ) formed with vertical side shrouds ( ) at opposite sides of each side wall ( ) which overlap and slide contact with opposite end guide walls ( ) of the side tappet ( ), respectively. When the tappet assembly ( ) is in an unlocked state so as to transmit rotation of the side cams ( ), the vertical side shroud ( ) of the center tappet ( ) slide on the vertical side walls ( ) of the side tappet so as thereby to guide slide movement of the center tappet ( ) relative to the side tappet ( ).

Valve drive mechanism for engine

In a V-type internal combustion engine having a pair of upwardly diverging cylinder banks and an auxiliary unit disposed at an upper portion in a space defined between the cylinder banks, a suction arrangement includes intake ports provided at an inner side of the respective cylinder banks, inclined inwardly by a predetermined angle with respect to respective clyinder axes, and extending upwardly in a generally vertical direction so as not to interfere with the auxiliary unit, and cylinder communicating portions connected to upper portions of the intake ports in communication with the respective cylinders to permit the introduction of the intake gas thereto.

Suction arrangement for internal combustion engine

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Hiroshima-ken, Japan

Setsuo Harada