What's the difference between spark plugs and fuel injectors in internal combustion engines?

1. Spark plug: It consists of connecting nut, insulator, connecting screw, center electrode, side electrode and shell.

2. Nozzle: It consists of plunger, plunger sleeve, needle valve, needle valve body, oil outlet valve and oil outlet valve seat.

Second, the role is different.

1. Spark plug: A component in the ignition system of an internal combustion engine that introduces high-voltage current into the cylinder to generate an electric spark to ignite the combustible mixture.

2. Nozzle: As a normally closed valve, it can accurately control the fuel supply, make the engine have the correct air-fuel ratio in any state, keep the engine running smoothly, and make the exhaust gas meet the specifications of environmental protection laws and regulations. Fuel injector is one of the key components of the engine, and its working quality will seriously affect the performance of the engine.

Third, the working principle is different.

1. Spark plug: The electric plate of the spark plug ignites the mixture in the cylinder through repeated power generation, and other parts of the ignition system generate timed high-voltage electric pulses, which form sparks and explode, providing the energy needed for engine power output.

2. Nozzle: When the electromagnetic coil is energized, suction is generated, the needle valve is sucked up, and the nozzle hole is opened, so that the fuel is ejected at high speed through the annular gap between the shaft pin at the head of the needle valve and the nozzle hole, forming mist, which is beneficial to full combustion.

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