How does a mechanical unit injector fuel system work?
How does a mechanical unit injector fuel system work?
Unit Injector. The fuel injection system for this engine is a mechanical unit injector type. The fuel injection pump and nozzle are combined in one injector assembly for each cylinder. All high pressure lines are eliminated. Fuel lines consist of supply lines to and from the cylinder head, fuel filter and fuel transfer pump.
Where is the injector information stored in the ECM?
The control functions for the fuel injection system are integrated in the engine control module (ECM). Each injector’s flow rate information and cylinder position are stored in the memory of both the glow plug control module (GPCM) and the ECM.
Where is the fuel rack on an injector?
Each unit injector has its own fuel rack, controlled by the governor with a control shaft which actuates all of the unit injectors simultaneously. The large extension on the side of the injector is the hold-down clamp. Shown at the bottom of the injector cut-away is the rack.
How to ensure fuel injectors are receiving the correct range?
Step 1: Turn the car on. Turn the key to the second (ON) position for this test. You want battery power flowing, but don’t want the engine running. Step 2: Set up DVOM to measure DC voltage. Use the lowest range possible if the meter doesn’t auto range.
Step 1: Turn the car on. Turn the key to the second (ON) position for this test. You want battery power flowing, but don’t want the engine running. Step 2: Set up DVOM to measure DC voltage. Use the lowest range possible if the meter doesn’t auto range.
The control functions for the fuel injection system are integrated in the engine control module (ECM). Each injector’s flow rate information and cylinder position are stored in the memory of both the glow plug control module (GPCM) and the ECM.
When to do the fuel injector flow rate programming?
The fuel injector flow rate programming must be done when any of the following procedures are performed: If the ECM does not communicate, the flow rate information can be retrieved from the GPCM.
How does the fuel injector work in an engine?
The injector sprays (injects) fuel into the cylinder of the engine through a nozzle so that the internal combustion process can begin. The fuel must be delivered at the right time, in the right amount, and at the correct pressure, angle, and spray pattern
