Engine and Emission Control System Description - Fuel Injection Control
EF & EC-16prose procedureFuel Injection Control
INPUT/OUTPUT SIGNAL LINE
Crank angle sensor
SignalEngine speed and piston position
Air flow meter
SignalAmount of intake air
Engine temperature sensor
SignalEngine temperature
Exhaust gas sensor
SignalDensity of oxygen in exhaust gas
Throttle sensor
SignalThrottle valve position / Throttle valve idle position
Neutral switch
SignalGear position
Vehicle speed sensor
SignalVehicle speed
Ignition switch
SignalStart signal
Air conditioner switch
SignalAir conditioner operation
Battery
SignalBattery voltage
Load switch (N.CVT)
SignalClutch signal
ABS
SignalN.CVT vehicles
BASIC FUEL INJECTION CONTROL
NOTE
The amount of fuel injected from the fuel injector, or the length of time the valve remains open, is determined by the E.C.U. The basic amount of fuel injected is a program value mapped in the E.C.U. ROM memory. In other words, the program value is preset by engine operating conditions determined by input signals (for engine rpm and air intake) from both the crank angle sensor and the air flow meter.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
NOTE
In addition, the amount of fuel injection is compensated for to improve engine performance under various operating conditions as listed below.
<Fuel increase>
1) During warm-up
2) When starting the engine
3) During acceleration
<Fuel decrease>
1) During deceleration