Air-cooled 2-cylinders 4 stroke small marine diesel engine

1. If the temperature of cylinder wall is higher,the heat radiated in air by diesel engine is lower,so,if heat efficiency is higher,the economy of fuel will be better.Commonly,the temperature of cylinder wall of air-cooling diesel engine is 10°C higher to water cooling one,so its heat efficiency is higher than water cooling one.Because of the heat radiated to air by air-cooling diesel engine is low,so its cooling air quality is 2/3 to water cooling diesel engine,and the power consumed by the fan is lower,so,consumption of fuel of air-cooling diesel engine is low.

2. Normal usage lifetime of engine is mainly determined on friction situation between piston group and cylinder hose.But worn quantity of cylinder hose etc and other important components is mainly depend on working time under 0°C. Because of high temperature of cylinder wall of air-cooling diesel engine and fast rising temperature,the acidity erosion and friction are avoided do avoided do the most extent.