PGM-FI - Injection Control
Fuel injection controls include fuel injection amount control, fuel cut control, and fuel pump control. Adaptive PGM-FI (programmed-fuel injection) technology enables accurate fuel controls, which contributes to increased engine power and decreased fuel consumption.
Fuel Injection Duration
The fuel injection duration is determined by adding correction values to a basic injection duration.
The powertrain control module (PCM) controls the amount of fuel injection by the length of time the injector is energized.
Fuel Injection Timing
The fuel injection timing is determined by the PCM, which calculates the injection time for each cylinder based on the signals from the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor. The PCM then controls the time to energize the injector.
CKP Sensor
The CKP sensor is attached to the engine block. Each of the 58 teeth on the CKP pulse plate passes over it, a pulse signal is delivered to the PCM.
CMP Sensor
The camshaft position (CMP) sensor is attached to the back cover of the front bank. Every time one of the five protrusions of the front camshaft pulley passes over it, a pulse signal is delivered.
Fuel Injector
The fuel injectors are installed on the cylinder head, they use multiple nozzles to inject high pressure fuel into the combustion chamber.
Providing six injection ports promotes a finer fuel spray and improved fuel consumption by reducing fuel adherence to the top surface of the piston, reduction of hydrocarbons (HC) discharge, and higher engine performance.
MAF Sensor/IAT Sensor
The mass air flow (MAF) sensor/intake air temperature (IAT) sensor contains a hot wire, a cold film, and a thermistor. The sensor is in the intake air passage. The resistance of the hot wire, the cold film, and the thermistor changes due to intake air temperature and air flow. The control circuit in the MAF sensor controls the current to keep the hot wire at a set temperature. The current is converted to voltage in the control circuit, then sent as an input to the PCM.