#
FUEL INJECTION CONTROL OPERATION [AJ]

BME014000000T63

## Fuel Injection Timing

### Outline of control

  • NE signal timing has been changed.

Timing chart

1 | NE signal (CKP sensor)
2 | SGT (in PCM)
3 | SGC signal (CMP sensor)
4 | Missing tooth at 90° BTDC (10°/tooth)
5 | TDC
6 | 60°
7 | 22.5°
8 | 1 pulse/720°
9 | Cylinder No.
10 | Crankshaft pulley
11 | Engine

## Control Zone

### Operation outline

  • Corrections has been changed.

### Closed loop zone

Corrections

Correction | Purpose | Conditions | Action
--- | --- | --- | ---
Fuel injection volume increase correction when start | To maintain engine speed stability when start | Cranking or just after engine start | Lower ECT: Larger correction
Warm-up correction | To maintain combustion stability during warm-up | According to ECT | Lower ECT: Larger correction
Basic heavy load increase correction | To increase engine torque and decrease exhaust gas temperature under heavy load | As required by engine load and engine speed under heavy load | Lower ECT: Larger correction
Basic closed loop correction | To control air/fuel ratio close to stoichiometric | When control is in closed loop zone | -
Learning correction | To deal with change in air/fuel ratio caused by secular change | At all times | -
D range correction | To maintain engine speed stability when shifting to D range | According to ECT at D range shift | Lower ECT: Larger correction
Acceleration/deceleration correction | Corrects change in air-fuel ratio during deceleration or acceleration when engine is cold | According to ECT | Lower ECT: larger correction