| 摘要 |
In a reciprocating internal-combustion engine of a low-temperature catalytic-combustion type, catalyst layers which act at low catalyst temperatures of about 500 DEG C. or downwards to permit combustion of a gaseous air-fuel mixture are formed or secured on the inner wall surfaces of each combustion chamber of the engine, whereby low-temperature catalytic combustion of the air-fuel mixture is made possible in quench layer formed along the inner wall surfaces of each combustion chamber separate from its piston-sliding region, whereby incomplete combustion is prevented, a regular operation is made possible even with a dilute gas mixture having air-fuel ratio exceeding the limit of misfire in the conventional engines, the fuel efficiency is enhanced and the reduction in hydrocarbon, CO and NOx in exhaust gas is attained as well.
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