Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Kazuhiko Itou

Norihiko Nakamura

Kiyoshi Nakanishi

Toyokazu Baika

Syouta Asano

Shuji Morita

Door for an automobile

An internal combustion engine having an auxiliary combustion chamber connected to only the main combustion chamber via a connecting passage. The engine comprises a first raised portion formed on the inner wall of the cylinder head, a second raised portion formed on the top face of the piston at a position opposite to the first raised portion with respect to the axis of the piston, and a third raised portion formed on the inner wall of the cylinder head above the second raised portion. A first flat squish area is formed between the flat peripheral top face of the piston and the flat bottom face of the first raised portion. A second spherical shell shape squish area is formed between the spherical bottom wall of the third raised portion and the spherical rear face of the second raised portion. A recessed portion is formed on the top wall of the main combustion chamber at a position near the first raised portion. The open end of the connecting passage is arranged in the recessed portion. The spark plug is arranged within the recessed portion at a position near the open end of the connecting passage and outside of the extension of the connecting passage.

Combustion chamber of an internal combustion engine

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Toyota, Japan

Kazuhiko Itou