6. VVT-i (Variable Valve Timing-intelligent) System

ENGINE 1ZZ-FE ENGINE169EG35172CR07 Camshaft Position SensorEngine Coolant Temp. SensorThrottle Position SensorECMC amshaft TimingOil Control ValveMass Air Flow MeterCrankshaft Position SensorCrankshaft Position SensorMass Air Flow MeterThrottle Position SensorCamshaft Position SensorEngine Coolant Temp. SensorVehicle Speed SignalTarget Valve TimingECMFeed BackCorrectionActual Valve TimingCamshaft timing Oil Control ValveDuty Control386. VVT-i ( variable Valve timing - intelligent ) SystemGeneralThis System controls the intake camshaft Valve timing so as to obtain balance between the engine output,fuel consumption and emission control performance. The actual intake side Valve timing is feed backby means of the camshaft position sensor for constant control to the target Valve 1ZZ-FE ENGINE165EG34 PlungerTo VVT-i Controller(Advance Side)To VVT-i Controller (Retard Side)ConnectorSleeveSpool ValveSpringDrainOil PressureDrainCoil39 Construction1) VVT-i ControllerThis controller consists of the housing driven from the timing chain and the vane coupled with the oil pressure sent from the advance or retard side path at the intake camshaft causes rotation in theVVT-i controller vane circumferential direction to vary the intake Valve timing the engine is stopped, the intake camshaft will be in the most retarded state to ensure hydraulic pressure is not applied to the VVT-i controller immediately after the engi

ENGINE — 1ZZ-FE ENGINE 165EG34 Plunger To VVT-i Controller (Advance Side) To VVT-i Controller (Retard Side) Connector Sleeve Spool Valve Spring Drain

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  Intelligent, Valves, Variable, Timing, Variable valve timing

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