SFI SYSTEM


  1. FUNCTION


    1. The Variable Valve Timing-intelligent Wide (VVT-iW) system is designed to control the intake camshaft within a range of 75° (of crankshaft angle) to provide valve timing that is optimally suited to the engine operating condition. This improves torque in all speed ranges as well as increasing fuel economy and reducing exhaust emissions.

    2. The operation angle for the VVT-iW has been made larger for the retarded side compared to the VVT-i. During partial load driving, the Atkinson cycle is entered, pumping loss is further reduced and fuel economy is enhanced.

      B006JV7E01

    3. In order to ensure engine startability, an intermediate lock mechanism is used for the VVT-iW. For details, see VVT-iW Controller in the 2GR-FKS Engine Mechanical section.