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ENGINE - Emission Control System 1-23 EMISSION CONTROL SYSTEM The following improvements in the control details have been made to the system, which is basically the same as the previous system used in the 4G63-DOHC-Turbocharger engine for the EVOLUTION-VI. An electronically-controlled EGR system utilizing an EGR control solenoid valve has been adopted. D An electronically-controlled purge control system utilizing purge control solenoid valve has been adopted. System Remarks Evaporative emission control system Electronic control type (Duty cycle type purge control solenoid valve) Exaust gas recirculation (EGR) system Electronic control type (Duty cycle type EGR control solenoid valve) EMISSION CONTROL SYSTEM DIAGRAM Check valve Canister From fuel tank Purge control solenoid valve Air inlet Oxygen sensor (front) Fuel pressure control solenoid valve Fuel pressure regurator To fuel tank PCV valve From fuel pump EGR valve Injector EGR control solenoid valve Oxygen sensor (rear) Three-way catalytic converter |