ENGINE UNIT


  1. CONSTRUCTION


    1. A high-expansion ratio Atkinson cycle is used, thus increasing thermal efficiency.

    2. Each cylinder of this engine has 2 intake valves and 2 exhaust valves. Intake and exhaust efficiency is increased due to larger total port areas.

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

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

    5. The intake and exhaust camshafts are driven by a chain sub-assembly.

    6. This engine has the Dual Variable Valve Timing-intelligent (Dual VVT-i) system which controls the intake camshaft (camshaft) and exhaust camshaft (No. 2 camshaft) to provide optimal valve timing according to driving conditions. With the use of this system, lower fuel consumption, higher engine performance, and fewer exhaust emissions have been achieved.

      A01O7FOC01
      *1 Camshaft Timing Gear Assembly *2 Timing Chain Guide
      *3 Camshaft *4 No. 2 Camshaft
      *5 No. 1 Valve Rocker Arm Sub-assembly *6 Chain Tensioner Slipper
      *7 No. 1 Chain Tensioner Assembly *8 Camshaft Timing Exhaust Gear Assembly
      *9 No. 1 Chain Vibration Damper *10 Intake Valve
      *11 Exhaust Valve *12 Valve Lash Adjuster Assembly
      *13 Valve *14 Chain Sub-assembly

    7. Valve Timing

      Intake camshaft Open -15° to 35° BTDC
      Close 105° to 55° ABDC
      Exhaust camshaft Open 54° to 14° BBDC
      Close 0° to 40° ATDC
      A01O79KC02
      *a VVT-i Operation Range (Intake) *b VVT-i Operation Range (Exhaust)
      *c TDC *d BDC
      B008JPG Exhaust Valve Opening Angle B008JPP Intake Valve Opening Angle