Where is the fuel injector installed?

[BryceAnn]

The fuel injector is installed on the intake manifold or cylinder head. The fuel injector is a simple solenoid valve. When the electromagnetic coil is energized, it generates suction force, lifting the needle valve to open the injection hole. Fuel is sprayed at high speed through the annular gap between the needle valve head and the injection hole, forming a mist that facilitates complete combustion. The reasons for fuel injector sticking include: 1. Unclean diesel with impurities in the high-pressure fuel line causing the needle valve pair to not close tightly; 2. Excessive engine temperature leading to poor injector cooling; 3. Wear of the outlet valve causing carbon buildup on the injector; 4. Low injection pressure resulting in backflow of high-pressure combustion gases into the combustion chamber; 5. Overly tight fit between the injector installation hole on the cylinder head and the injector.