The difference between gas engine and fuel engine

The difference lies in their working principles.

The difference lies in their working principles.

1. Working principle of fuel engine
Let's take a single-cylinder gasoline engine as an example to explain the working principle of the fuel engine.

A piston is installed in the cylinder, and the piston is connected to the crankshaft through a piston pin and a connecting rod. The piston reciprocates in the cylinder and drives the crankshaft to rotate through the connecting rod. In order to inhale fresh gas and exhaust exhaust gas, an intake valve and an exhaust valve are provided.
The piston top is farthest from the center of the crankshaft, that is, the highest position of the piston, which is called the top dead center. The piston top is closest to the center of the crankshaft, that is, the lowest position of the piston, which is called the bottom dead center.
The distance between the upper and lower dead centers is called the piston stroke, and the distance from the connection center of the crankshaft and the lower end of the connecting rod to the center of the crankshaft is called the crankshaft radius. Each stroke of the piston corresponds to a crankshaft rotation angle of 180°.
For an engine whose cylinder centerline passes through the crankshaft centerline, the piston stroke is equal to twice the crank radius.
The volume swept by the piston from the top dead center to the bottom dead center is called the engine's working volume or engine displacement, represented by the symbol VL.
The working cycle of a four-stroke engine includes four piston strokes, namely the intake stroke, compression stroke, expansion stroke (power stroke) and exhaust stroke.

2. Working principle of gas engine:
LNG enters the carburetor from the gas cylinder through the pipeline to be heated and vaporized, and then is stabilized by the gas after being stabilized by the pressure regulator tank and filtered by the gas filter. After that, it can enter the pressure regulator through the electromagnetic cut-off valve to stabilize the pressure, and the stabilized gas enters the heat exchanger.
CNG enters the pressure reducer from the compressed gas cylinder through the pipeline to reduce the pressure to 8 bar, and then enters the heat exchanger through the filter.
The gas is heated by the heat exchanger and enters the FMV through the thermostat. It is controlled by the FMV to be injected into the mixer and mixed with the pressurized air. The electronic throttle controls the mixed gas to enter the engine cylinder for combustion and work.
LPG comes out of the gas cylinder and passes through the high-pressure solenoid valve to the vaporizer and pressure regulator, becoming gaseous LPG. LPG is fully mixed with air in the mixer through the FTV and enters the engine cylinder for mixed combustion.
The most fundamental difference is the engine. Their working principles are very different. The diesel engine is compression ignition with an ignition point of 220°C; the gasoline engine is spark ignition with an ignition point of 427°C; and the natural gas engine is spark ignition with an ignition point of 650°C.

ENGINE HYUNDAI G4FG

Fuel engines (such as cars) are driven by pistons and cylinders. Gas engines (thermal power generation) use gas to spray onto turbines to drive rotation.

The biggest advantage of gas engines is low pollution. Natural gas engines do not dilute lubricating oil, can extend engine life, and can also reduce car noise.
However, there are still some problems in the use of gas engine cars, among which the most prominent are engine power reduction, engine corrosion and early wear.
The reason for the power reduction of natural gas cars is the decrease in the inflation coefficient and the low engine compression ratio; the reason for the early wear of the engine is caused by trace sulfides in natural gas.

NISSAN  ZD25 2.5L  10101-Y3700

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