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The heat efficiency and economy are good. The diesel engine uses compressed air to raise the air temperature and make the air temperature exceed the spontaneous combustion point of diesel oil. At the same time, diesel oil and diesel spray are mixed with air to ignite and ignite. Therefore, diesel engine does not need ignition system. At the same time, the fuel supply system of diesel engine is relatively simple, so the reliability of diesel engine is better than that of gasoline engine. The compression ratio of diesel engine is very high because it is not limited by deflagration and the need of diesel spontaneous combustion. The thermal efficiency and economy of diesel engine are better than that of gasoline engine. At the same time, under the same power, the torque of diesel engine is large and the speed at maximum power is low, which is suitable for the use of truck.
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