Honda Giken Kogyo Kabushiki Kaisha

Takao Kajiware

Kenji Kimura

An internal combustion engine having a plurality of in-line cylinders is provided with a series of exhaust pipes each connected to receive exhaust gases from two cylinders of different exhaust timing. A first reaction chamber receives exhaust gases from each of the exhaust pipes. A second reaction chamber surrounds and encloses the first reaction chamber and said exhaust pipes. A deflector within the second reaction chamber extends continuously from a position adjacent the entrance end of the exhaust pipe at one end of the series to a position adjacent the entrance end of another exhaust pipe at the other end of the series, the deflector acting to cause exhaust gases moving through the second reaction chamber to pass over the major portion of the lengths of each of the exhaust pipes. Oxygen-rich exhaust gases from the engine are held at a high temperature for long residence time to oxidize HC and CO and thereby minimize the quantity of these pollutants discharged into the atmosphere.

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Saitama, Japan

Takao Kajiware