Mazda Motor Corporation

Kazuhiro Tomizawa

Yasushi Nakahara

Masaki Fukuma

Masahiro Naito

Hiroshi Hosokawa

Kouichi Shimizu

Yuma Miyauchi

Akira Asai

Kiyonori Nagato

Jun Nishikawa

Yasuhiro Sudou

Ikuma Takahashi

Yasutomo Kusunoki

Mitsuo Mimura

Naoyuki Abe

Osamu Torobu

Hiroyuki Abe

Kazuhiro Matsuoka

There is provided, in one aspect of the present description, an engine. In one example, the engine comprises a cylinder block, a cylinder head, a sheet metal gasket interposed between the block and the head, a first projection projecting outwardly and laterally from a side portion of the block, and a second projection projecting outwardly and laterally from a side portion of the head, the first projection and the second projection facing each other along a coupling surface between the block and the head. The engine further comprises an extension extending from a main body of the sheet metal gasket and located between the first projection and the second projection, and a resilient portion which is provided in the extension, formed resiliently in a direction perpendicular to the coupling surface, and compressed between the first projection and the second projection when the head is fastened on the block.

Engine with vibration suppression structure

According to this invention, a piston design support program for supporting design of a piston shape of an internal combustion engine, makes a computer execute an input step of inputting specification values associated with a piston shape, a verification step of verifying, based on the input specification values, whether or not gaps between the piston and its surrounding components are appropriate, a read step of reading out, when it is determined in the verification step that the gaps are appropriate, a three-dimensional piston model which can be deformed according to a predetermined rule from a database, and a deformation step of deforming the piston model on the basis of the specification values.

Piston design support program, design support method, and design support apparatus

In the variable valve timing system according to the present invention, portions of the intake-side advancing hydraulic line and a retarding hydraulic line respectively constitute annular groovesandfor advancing and retarding provided on the intake camshaftbearing surfaceof the cam capwhich supports the camshaftsand. In addition, portions of the advancing hydraulic line and the retarding hydraulic line for exhaust respectively constitute annular grooves for advancing and retardingandprovided on the exhaust camshaftbearing surfaceof the cam cap. Moreover, the annular groove for retardingon the intake camshaftbearing surfaceand the annular groove for advancingon the exhaust camshaftbearing surfaceare respectively provided in the center in the width direction of their respective bearing surfacesand

Engine variable valve timing system

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Hiroshima, Japan

Kazuhiro Tomizawa