ENGINE UNIT


  1. CONSTRUCTION


    1. The 2ZR-FXE engine is a high-expansion ratio Atkinson cycle engine of which the intake valve close timing has been significantly retarded by setting the VVT-i controller (camshaft timing gear assembly) and camshaft (intake) to the retard side.

    2. Each cylinder is equipped with 2 intake valves and 2 exhaust valves. Intake and exhaust efficiency has been increased due to larger total port areas.

    3. The valve mechanism uses a roller rocker arm with built-in needle bearings. This reduces the friction that occurs between the cams and the areas on the No. 1 valve rocker arm sub-assemblies that push the valves down, thus improving fuel economy.

    4. Hydraulic valve lash adjusters, which maintain a constant zero valve clearance through the use of oil pressure and spring force, are used.

    5. The camshaft (intake) and No. 2 camshaft (exhaust) are driven by a timing chain (chain sub-assembly).

    6. The Variable Valve Timing-intelligent (VVT-i) system is used to achieve low fuel consumption, high engine performance and reduce exhaust emissions.

      A01RGDAC01
      *1 Camshaft (Intake) *2 No. 2 Camshaft (Exhaust)
      *3 VVT-i Controller (Camshaft Timing Gear Assembly) *4 No. 2 Chain Vibration Damper
      *5 Timing Chain (Chain Sub-assembly) *6 No. 1 Chain Tensioner Assembly
      *7 Chain Tensioner Slipper *8 No. 1 Chain Vibration Damper
      *9 Exhaust Valve *10 Intake Valve
      *11 No. 1 Valve Rocker Arm Sub-assembly *12 Valve Lash Adjuster Assembly