<4G63, 4G64>
The emission control system is basically the same as that of the 4G6 engine used in the
Space Wagon.| System |
Vehicles with catalytic converter |
Vehicles without catalytic converter |
Remarks |
|---|---|---|---|
| Crankcase ventilation system |
× |
× |
Closed type |
| Evaporative emission control system |
× |
- |
Electronic control type with duty signal only (ON/OFF control for
others) |
| - |
× |
Vacuum control type |
|
| Exhaust gas recirculation (EGR) system |
× |
× |
Electronic control type with duty signal |
| Air/fuel ratio closed loop control |
× |
- |
Oxygen sensor signal used |
| Catalytic converter |
× |
- |
Three-way catalytic converter |
EMISSION CONTROL SYSTEM DIAGRAM
<4G63-SOHC>
)
<4G63-DOHC>
)
<4G64>
)
<4G69>
Based on the controls on the previous 4G6-MPI engine, the following improvements have
been made to improve exhaust gas reduction performance- Adoption of an electronically controlled EGR valve (stepper motor type)
- Adoption of dual manifold catalytic converters (MCC).
- Adoption of dual oxygen sensors, along with the adoption of dual manifold catalytic converters (MCC).
| System |
Remarks |
|---|---|
| Crank case ventilaton system |
Closed type |
| Evaporative emission control system |
Electric control type with duty signal |
| Exhaust gas recirculation (EGR) system |
Electric control (Stepper motor) type with duty signal |
| Air/fuel ratio closed loop control |
Oxygen sensor signal used |
| Catalytic converter |
Three-way catalytic converter |
<4G69-Except for Brazil, Chile and Hong kong>
)
<4G69-Vehicles for Brazil and Chile>
)
NOTE: The evaporative emission ventilation solenoid valve [always OPEN (OFF)],
fuel tank differential pressure sensor, fuel level gauge, fuel temperature sensor are not used
for engine control.
<4G69-Vehicles for Hong kong>
)