Photographic Study of Combustion in a Pre-Combustion Type Diesel Engine : (2nd Report, Combustion in a Main Combustion Chamber)

Abstract

Using a high-speed motion picture camera, the authors made flame photographs through a glass window set on the cylinder head of a pre-combustion type Diesel engine. For the cases of various directions of gas outflow and also for various shapes of cavity on a piston crown, the process of mixing and combustion of the gas mixture blown out from the precombustion chamber, swirl creation and flame distribution in the cylinder were investigated. In addition, the suitable design of the main combustion chamber for improvement on the combustion was discussed by comparing the results of performance test obtained in a single cylinder engine.