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EXHAUST EMISSION CONTROL SYSTEM EC -17 CONTINUOUS VARIABLE VALVE DESCRIPTION ECBE8ABD CMPS Intake Camshaft PCM CVVT Retard Chamber CVVT Advance Chamber RETARD ADVANCE Housing Vane Vane CVVT Housing OCV DRAIN DRAIN From Oil Pump VARIOUS SENSOR After Main Relay After Main Relay UEBG013A The CVVT (Continuously Variable Valve Timing) which is This CVVT system improves fuel efficiency and reduces Driving Condition Intake Valve Timing Effect Enhanced torque Enhanced Power High load& Low rpm (3) High load& High rpm (4) Advance Retard Enhanced fuel economy and exhaust emissions Part load (2) Advance Light load (1) Retard Stable combustion 1 3 4 2 RETARD ADVANCE ENGINE SPEED (RPM) LOAD Low High High LEIF001Q OPERATION EA7ECAF2 The CVVT system makes continuous intake valve timing Intake valve timing is optimized to allow the engine to pro- |