1994-03-01

Development of OSKA-DH Diesel Engine Using Fuel Jet Impingement and Diffusion Investigation of Mixture Formation and Combustion 940667

This study is concerned with development of a new type of diesel engine using the fuel jet impingement (OSKA-DH).
Simultaneous reduction of the NOx and smoke emission were demonstrated with single cylinder prototype OSKA-DH engine.
As a fundamental study on the mixture formation process, the observation of impinged fuel spray was studied by using a pressurized constant volume vessel. The high-speed combustion photographs of both re-entrant and open type combustion chamber were also taken by using the experimental transparent engine.
From the observation of pressurized vessel and high-speed combustion photographs, the mixture formation and combustion was strongly affected by the squish flow velocity. The short ignition delay and faster combustion were observed by the re-entrant type combustion chamber because of high squish speed.

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