ENGINE UNIT


  1. CONSTRUCTION


    1. An aluminum die cast open deck type cylinder block is used, greatly reducing weight and providing high rigidity. With a bank angle of 60°, a bank offset of 36.6 mm (1.44 in.) and a bore pitch of 105.5 mm (4.15 in.), overall length and width have been reduced, providing a compact construction.

    2. The shape of the cylinder block has been optimized to reduce weight and provide high rigidity.

    3. Bore roundness has been greatly improved by changing the shape of the bore outer wall area, reducing oil consumption.

    4. The rib shape around the knock sensor installation area has been optimized to improve control.

    5. Breather holes are provided on the journal portion in order to reduce friction when the engine speed is high, improving performance.

    6. Heat treatment has been applied to reduce the deformation that occurs in each area from prolonged use, reducing friction and oil consumption.

      B0072E6C05
      *a Knock Control Sensor Boss *b Breather Holes

    7. A water passage has been provided between the cylinder bores. By allowing the engine coolant to flow between the cylinder bores, this construction enables the temperature of the cylinder walls to be kept uniform.

      B0072CKC04
      *a Water Passage - -

    8. The liners are a spiny-type, which have been manufactured so that their casting exterior forms a large irregular surface in order to enhance the adhesion between the liners and the aluminum cylinder block. The enhanced adhesion helps improve heat dissipation, resulting in a lower overall temperature and reduced heat deformation of the cylinder bores.

      B0072DRC04
      *1 Cylinder Block *2 Liner
      *a Irregularly Shaped Outer Casting Surface of Liner *b A-A Cross Section