Construction VVTi Controller

This controller consists of the housing driven from the timing chain and the vane coupled with the intake and exhaust camshafts.

The intake side has used a VVT-i controller with 3 vanes, and the exhaust side has used one with 4 vanes.

When the engine stops, the intake side VVT-i controller is locked on the most retarded angle side by the lock pin, and the exhaust side controller is locked on the most advanced angle side. This ensures excellent engine startability.

The oil pressure sent from the advance or retard side path at the intake and exhaust camshaft causes rotation in the VVT-i controller vane circumferential direction to vary the intake valve timing continuously.

An advanced angle assist spring is provided on the exhaust side VVT-i controller. This helps to apply torque in the advanced angle direction so that the vane lock pin securely engages with the housing when the engine stops.

^ Intake Side VVT-i Controller '

Sprocket

Housing

Timing Rotor

^ Intake Side VVT-i Controller '

Sprocket

Housing

Timing Rotor

Vvti Sprocket Removal

W-f Intake Camshaft

Vane (Fixed on Intake Camshaft)

Oil Pressure

W-f Intake Camshaft

Vane (Fixed on Intake Camshaft)

Oil Pressure

In Operation At a Stop Lock Pin

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