What is the working principle of a diesel engine?

1 Answers
MacLeonardo
07/30/25 4:37am
The working principle of a diesel engine is: to generate high heat by compressing air, then atomize and inject diesel fuel through the engine's fuel injector, creating an explosive expansion effect inside the engine, which drives the piston to work. The diesel engine consists of the engine block, crankshaft connecting rod mechanism, valve train, fuel supply system, lubrication system, cooling system, and starting system. Diesel engines are divided into: 1. Spark-ignition engines: Gasoline engines inject gasoline into the intake manifold, mix it with air to form a combustible mixture, which then enters the cylinder and is ignited by the spark plug to burn and expand, performing work; 2. Compression-ignition engines: Diesel engines directly inject diesel fuel into the engine cylinder through the fuel injection pump and injector, where it mixes uniformly with the compressed air in the cylinder, spontaneously igniting under high temperature and pressure, driving the piston to perform work.
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