Diesel Injector Fuel Injector 0445120309 Bosch for Dongfeng Trucks Engine

Circuit faults and symptoms fall into three categories
One is that the power supply to the fuel injector is faulty, the power supply relay or the fuse fails, so the fuel injector does not have enough energy to supply the power supply, and the fuel injector cannot inject fuel with electricity, and the symptom is that the engine cannot start
The second is that the coil winding of the injector itself is faulty, the coil is open or short circuited, and the coil resistance is abnormal. The electric anode of the coil of the ordinary electromagnetic injector is about 13Q~16. If the resistance value of the injector coil is too large or too small, it cannot generate enough magnetic field and cannot achieve sufficient suction force, and the shaft needle of the injector It can't move, and the fuel can't be sprayed.
The third is that the engine computer has a fault in the control circuit of the electromagnetic fuel injector. The control signal can accurately give the opening time of the fuel injector and the size of the fuel injection. If the control circuit is open, the current cannot be conducted, and the fuel injector cannot control the fuel and cannot enter. Combustion chamber, the engine will not run. If the insulation of the control circuit is damaged and it is in contact with the engine casing, the current of the fuel injector coil will continue to conduct, and the fuel will continue to enter the engine combustion chamber, causing the engine to be drowned if the mixture is too rich, and the exhaust will emit black smoke, etc. . The root causes are the plug falling off, poor contact, wire breakage and short circuit, etc.