A Newly-Developed 1.5L CVCC Engine for Some 1980 Models 800321

In this paper, the fuel consumpion and exhaust gas emission characteristics of a newly developed 1.5ℓ CVCC engine are compared with those of a conventional engine, the pressure and temperature of combustion gas in each cylinder are measured on real time in order to clarify the differences between these characteristics, arid combustion analyses are made on the basis thereof.
Basically, this CVCC engine differs little from original CVCC engines, in which, however, the auxiliary combustion chamber is located closer to the center of the main combustion chamber than in original ones and torch opening is modified to be of the multi-opening type so that the torch flame spreads all over the main combustion chamber. As a result, compared with conventional engines operated at the rich air-fuel ratio (14.7), the new CVCC engine is capable of provide, not only at the same air-fuel ratio, to be sure, but also in the lean range, a stable combustion which is small in the cycle variation, whereby the fuel consumpion and emissions are improved.


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