[17] ENGINE AND EMISSION CONTROL - - EMISSION CONTROL - GENERAL INFORMATION | PRINT PAGE / INDEX / PRIOR / NEXT

EMISSION CONTROL

GENERAL INFORMATION
<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>

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