Nissan Motor Company Limited

Takashi Kunugi

Shigeru Sakuragi

Hidehiro Fujita

Tsuyoshi Tamazawa

Toru Sasaki

A V-type multiple cylinder air intake is being configured to improve the volumetric efficiency by utilizing the resonance effect while also eliminating the adverse influence of the resonance effect (residual resonance) when the engine is operating in regions of medium to high rotational speeds. The V-type multiple-cylinder air intake device has two collectors with one arranged on each bank of the V-type multiple-cylinder engine; a plurality of branch pipes extending from the collectors to a respective intake port of an opposite bank; and a plurality of crossover passages extending from the collectors to a respective branch pipes extending from the collector of the opposite bank.

V-type multiple-cylinder air intake device

The present invention concerns an overheat protection device for a catalytic converter in which the injection of secondary air is prevented when the temperature in the catalytic converter is higher than a lower predetermined value and a warning signal is produced when the temperature is higher than a higher predetermined value.

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Kamakura, Japan

Takashi Kunugi