Abstract
In this paper the questions and problems associated with the design of small Diesel engines are discussed. The relative merits of air- and water-cooled systems are considered, and the design principles of a small four-stroke water-cooled Diesel engine are evolved. After dealing with general design aspects the authors consider the related problems of fuel injection and combustion, referring to the influence of fuel injection components. The paper concludes with a section on future development in which the authors discuss the smallest economic cylinder size and methods of achieving more power, greater simplicity and increased thermal efficiency.
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