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 the larger total port areas.

    2. This engine uses a valve rocker arm sub-assembly with built-in needle bearings. This reduces the friction that occurs between the cams and the valve rocker arm sub-assembly that push the valves down, thus improving fuel economy.

    3. A valve lash adjuster assembly, which maintains a constant 0 valve clearance through the use of oil pressure and spring force, is used.

    4. The exhaust camshaft is driven by a timing chain (chain sub-assembly), while the intake camshaft is driven through a gear on the exhaust camshaft.

    5. A supply pump assembly is driven by the exhaust camshaft to achieve a lightweight and compact design.

    6. A vacuum pump assembly is driven by the intake camshaft to achieve a lightweight and compact design.

      A01QFMPC01
      *1 Intake Camshaft *2 Exhaust Camshaft
      *3 Vacuum Pump Assembly *4 Timing Chain (Chain Sub-assembly)
      *5 No. 1 Chain Tensioner Assembly *6 Chain Tensioner Slipper
      *7 Supply Pump Assembly *8 Intake Valve
      *9 Exhaust Valve *10 No. 1 Chain Vibration Damper
      *11 Valve Rocker Arm Sub-assembly *12 Valve Lash Adjuster Assembly
      *13 Valve - -
      A01QF17E04
      *a TDC
      *b Intake valve opening angle
      *c Exhaust valve opening angle
      *d BDC