GENERAL INFORMATION








System Comfiguration Diagram


<4A91-M/T>

<4A91-A/T>

<4B10>

<4B11-Turbo>


Exhaust gas cleaning devices list
System
 Objective / Function
 Composition parts
Crankcase ventilation system
 HC decrease
Re-combustion of blow-by gas.
 Positive crankcase ventilation (PCV) valve
Evaporative emission control system
 HC decrease
Re-combustion of fuel vapor gas.
  • Canister
  • Purge control solenoid valve
Emission reduction systems
 Air-fuel ratio feedback control
 Decrease of CO, HC and NOx
Controls air-fuel ratio of air-fuel mixture to become theoretical air-fuel ratio (about 14.7), which is when the 3-way catalytic converter’s cleaning performance is best. It also controls optimum fuel supply based on coolant temperature, driving conditions etc.
  • Engine-ECU
  • Air flow sensor <4B10, 4B11>
  • Manifold absolute pressure sensor <4A91>
  • Injector
  • Oxygen sensor
  • Crank angle sensor etc.
Catalytic converter
 Decrease of CO, HC and NOx
It facilitates oxidation of CO and HC and reduction of NOx so that all 3 component gases are cleaned simultaneously.
 Monolith catalyst