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How to adjust the fuel supply time of a single-cylinder air-cooled diesel engine

Date: 2022/06/09

A single-cylinder diesel engine, i. e. a diesel engine with only one cylinder, is classified by the number of cylinders. Single-cylinder diesel engines are mainly used in agricultural machinery, construction machinery, marine machinery, power industry, and other fields. So how do adjust the fuel supply time of a single-cylinder diesel engine?


single-cylinder air-cooled diesel engine


1. Fuel is supplied too early

When the oil supply time is too early, the mixed gas will form ahead of time and catch fire too early, the expanding gas will produce a counter-compression force to the ascending piston, and when the diesel engine flameout, the back pressure is greater than the piston's upward inertial compression force, forcing the piston down, causing the crankshaft to reverse, so the fan or flywheel also reverse.


2. Fuel supply is late

When the fuel supply time is too late, the formation and combustion process of the mixed gas is delayed until the piston descends, the moment the diesel engine flameout, the crankshaft rotation inertia force becomes small, and will immediately stop turning, and the performance of the fan or flywheel immediately stop motion phenomenon.


3. Adjust the optimum fuel supply advance angle

The fuel supply advance angle, acting on the fuel supply system of the diesel engine, has a great effect on the performance of the diesel engine. The fuel supply advance angle is too big or too small, which will worsen the power and economy of the diesel engine. In order to ensure the good performance of diesel engines, it is necessary to work under the optimum fuel supply advance angle. When the rotation speed and fuel supply quantity are constant, the fuel supply time that can obtain the maximum power and the minimum fuel consumption rate is called the optimal fuel supply advance angle. The optimal fuel supply advance angle varies with the speed and load of the diesel engine. The higher the speed, the greater the load, and the greater the optimal fuel supply advance angle. A general diesel engine that works more than 500h or after the demolition of the fuel injection pump, must be given to adjusting the best fuel supply advance angle (fuel supply time).


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