Emission Control System: Purpose

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The emission control systems are installed to reduce the amount of HC, CO and NOx exhausted from the engine ((3) and (4)), to prevent the atmospheric release of blow-by gas-containing HC (1) and evaporated fuel containing HC being released from the fuel tank (2). The function of each system is shown in SYSTEM FUNCTION :

SYSTEM FUNCTION

System

Abbreviation

Function

Positive Crankcase Ventilation

PCV

Reduces HC

Evaporative Emission Control

EVAP

Reduces evaporated HC

Three-Way Catalytic Converter

TWC

Reduces HC, CO and NOx

Sequential Multiport Fuel Injection ⁽¹⁾

SFI

Injects a precisely timed, optimum amount of fuel for reduced exhaust emissions

Remark:

⁽¹⁾	For inspection and repair of the SFI system, (See SFI SYSTEM .