Tracker 2WD L4-1.6L VIN 6 (2000)
Fuel Injector: Description and Operation
Fuel Injection Operation
The Powertrain Control Module (PCM) controls the amount of fuel the fuel injector supplies to each cylinder by controlling the ON time, length of
pulse, of each individual injector. The delivery timing of the fuel into the cylinder head intake port by the fuel injector is controlled by the PCM. The
timing and pulse of the fuel injectors is carefully calculated with inputs from the various sensors, so that a suitable air/fuel mixture is supplied to the
engine for every driving condition.
There are two types of injection timing. One is synchronous injection, in which the injection is synchronous with the ignition signal, or the signal from
the Camshaft Position (CMP) Sensor. The other is asynchronous injection, in which injection takes place independently of the ignition signal, or the
signal from the Camshaft Position (CMP) Sensor.
The powertrain control module (PCM) first calculates the correct timing of the fuel injectors by factoring the engine speed and the air volume together.
Then the PCM applies certain compensations that are based on the information provided by various sensors which detect the state of the engine and the
current driving conditions.
