Brief description Natural gas engine and diesel engine difference

The design foundation of the natural gas engine is a diesel engine, mainly for redesigning the air supply system and ignition system, ie the oil supply system of the diesel engine is changed to the gas supply system, and the spark plug is added. Most of the other mechanical parts and is universal.
1. Cancel the fuel system of the diesel engine (high pressure oil pump, injector, high pressure tube and other parts), increasing the gas supply system (gas cylinder, high pressure cutout valve, decompression, gas heat exchanger and thermostat, injection valve) Equal).
2, use a ignition combustion method (the injector mounting hole on the cylinder head is changed to the spark plug mounting hole), increasing the ignition control system (ignition controller, ignition coil, high voltage line, spark plug).
3, the compression ratio is different from the form of combustion chamber (piston) than the diesel engine. General diesel compression ratio 17: 1, Tian gas engine 11: 1.
4, add the signal generator, used to determine the cylinder and measuring the engine speed.
5, increasing the mixer and throttle, allowing gas and air to be thoroughly mixed in the mixer.
6, high exhaust gas, supercharger adopts water-cooled intermediate shell.

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