The difference between a gasoline engine (essence) and a diesel engine (diesl)
In theory, a diesel engine and a gasoline engine are very similar. Both are internal combustion engines that are designed on the basis of converting thermal energy into kinetic (mechanical) energy. This kinetic energy moves the piston up and down, moving the crankshaft (crankshaft) to transform into a rotational motion used to turn the vehicle's wheels. However, there are many differences between them, which we will explain today, God willing.
Main differences:1. During the intake stroke, the drawn charge in gasoline engines is a mixture of fuel and air, while in diesel engines it is only air.
2. Compression pressures in gasoline engines are lower than in diesel engines; Due to lower compression ratios, compression temperatures are also lower in gasoline engines.
3. In gasoline engines, fuel is mixed with air before entering the cylinder through the feeder or by injection before the intake valve, while in diesel engines this is done near the top dead center inside the cylinder.
4. Ignition is done by a spark plug (spark plug) in gasoline engines, while in diesel engines it is ignition by compression.
5. Combustion generates a pressure of approximately 32 bar in gasoline engines, while approximately 82 bar in diesel engines. Diesel fuel contains more thermal energy than gasoline.
6. The exhaust temperature of gasoline engines is much greater than that of diesel engines, because some of the fuel continues to burn during the exhaust stroke. The exhaust gases of gasoline engines also contain a greater percentage of carbon monoxide than diesel engines.
7. One of the disadvantages of diesel engines is that the exhaust gases contain large amounts of nitrogen oxides, which are harmful gases for the environment, resulting from high temperatures during combustion compared to gasoline engines.
8. The efficiency of diesel engines is about 10% higher than that of gasoline engines, because the compression ratios in diesel engines are greater, and the stored energy (calorific value) in diesel fuel is higher than gasoline.
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