Toyota Jidosha Kabushiki Kaisha

Yamaha Hatsudoki Kabushiki Kaisha

Toyoda Boshoku Corporation

Tetsuya Saeki

Yuichi Suzuki

Tomihisa Tsuchiya

Shizuo Abe

Terutoshi Tomoda

Akira Yamaguchi

Shinichi Kurosawa

Takane Iwatsuki

Masaki Katou

A dual-injector fuel injection engine includes a cylinder block, a cylinder head, an intake port, an intake manifold, a surge tank, an in-cylinder injector, an intake pipe injector, and first and second delivery pipes. The in-cylinder injector is positioned below the intake port, when seen from an axial direction of a crank shaft, and attached to the cylinder head. The intake pipe injector and the second delivery pipe are supported above the intake port, when seen from the axial direction of the crank shaft, by the intake manifold to be close to the intake port.

Dual-injector fuel injection engine

There is difference between coefficients of thermal expansion of the first member and the second member. A mismatch occurs between the walls of the first member and the second member when the temperature is changed significantly. Stress generated by this mismatch is distributed among and received by respective fitting sections of respective concave portions and respective convex portions. Because these fitting sections exist above and below the joining member, stress generated by the mismatch is distributed and received by the fitting sections before the stress reaches the joining member. Therefore, only a little stress acts on the joining member.

Structure for coupling two types of members

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Toyota, Japan

Tetsuya Saeki