ENGINE UNIT


  1. CONSTRUCTION


    1. 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.

    2. 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.

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

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

    5. This engine has the Dual Variable Valve Timing-intelligent (VVT-i) system which controls the intake camshaft and exhaust 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.

      B0023K3C01
      *1 Timing Chain Guide *2 Chain Sub-assembly
      *3 Camshaft Timing Gear Assembly *4 Chain Tensioner Slipper
      *5 No. 1 Chain Tensioner Assembly *6 No. 1 Chain Vibration Damper
      *7 Camshaft Timing Exhaust Gear Assembly *8 Intake Valve
      *9 Exhaust Valve *10 Exhaust Camshaft (No. 2 Camshaft)
      *11 Intake Camshaft (Camshaft) *12 No. 1 Valve Rocker Arm Sub-assembly
      *13 Valve Lash Adjuster Assembly *14 Valve

      Figure 1. Valve Timing

      B00238ZC01
      *a VVT-i Operation Range (Intake) *b VVT-i Operation Range (Exhaust)
      *c TDC *d BDC
      B0082XT Exhaust Valve Opening Angle B0082R6 Intake Valve Opening Angle