The difference between diesel engine and other internal combustion engines (such as gasoline engine) is that the latter introduces the flammable mixture of air and vaporized or gaseous fuel into the cylinder and ignites it with an electric spark after appropriate compression, while the former does not use an ignition system, so it is often called a compression ignition engine. The fuel for diesel engines is graded and unrefined. Its disadvantages are high initial cost and large weight per horsepower, resulting in air pollution, running noise and vibration.

Diesel Engine complete for 4BT, 6BT, 4CT, 6CT, 6LT, QSB4.5, QSB6.7, QSB5.9, ISF2.8, ISF3.8, QSL9, QSM11, QSX15, ISM11, ISG11, ISG12, QSB7, QSL8.9, QSL9.3, QSF2.8, QSF3.8, ISB series, ISDe series, ISLe series, etc.

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