FUEL INJECTOR CONSTRUCTION/OPERATION [L8, LF]

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• Installed on the cylinder head.
• Mainly consists of a coil, spring, needle valve and ball.
• A signal is sent from the PCM causes excitation current to pass through the coil and thereby pull in the needle valve. Since the ball that opens and closes the injection opening is integrated with the needle valve, it is pulled together with the needle valve and fuel is injected.
• The amount of injection is determined by the open time of the needle valve (equal to the energization time of the coil).

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