Fundamental Study on DISC Engine with Two-Stage Fuel Injection.
Open Access
- 1 January 1993
- journal article
- Published by Japan Society of Mechanical Engineers in TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
- Vol. 59 (557) , 304-309
- https://doi.org/10.1299/kikaib.59.304
Abstract
An experimental study has been carried out on combustion characteristics in a direct-injection stratified-charge SI engine. A water-cooled, 4-cylinder, 4-stroke-cycle diesel engine with a square piston cavity was modified to permit installation of a spark plug. Charge stratification was accomplished with two-stage fuel injection. The main fuel was injected at the beginning of induction stroke to form lean homogeneous mixture, and the auxiliary fuel was injected just before the spark to produce rich mixture near by the spark plug. Following results were obtained ; the lean limit was extended up to near 25 in air fuel ratio without detraction from fuel consumption and HC emissions, the optimum quantity of auxiliary fuel was found in consideration of lean limit and fuel consumption, and the ignition delay was shortened compared with no charge stratification.Keywords
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