ENGINE UNIT


  1. CONSTRUCTION


    1. An aluminum cylinder block sub-assembly with a 7 mm (0.276 in.) distance between the cylinder bores is used to achieve a compact and lightweight configuration.

    2. An oil separator is provided in the blowby gas passage inside the cylinder block sub-assembly. This separates the engine oil from the blowby gas in order to reduce the degradation and consumption of the engine oil.

    3. A spiny type liner, which has an irregularly shaped outer casting surface, is used to enhance the adhesion between the liners and aluminum of the cylinder block sub-assembly. The enhanced adhesion helps heat dissipation, resulting in a lower overall temperature and reduced heat deformation of the cylinder bores. A cylinder block sub-assembly with this type of liner cannot be rebored.

      A001N66C01
      *1 Cylinder Block Sub-assembly *2 Oil Separator Cover
      *a Oil Separator *b Cylinder Bore Cross Section
      *c Spiny-type (Irregularly Shaped Outer Casting Surface of Liner) - -

    4. Through the use of the offset crankshaft, the centerline of the cylinder bores is shifted 8 mm (0.315 in.) towards the intake in relation to the centerline of the crankshaft. Thus, the side force (thrust) applied to the cylinder walls is reduced when maximum combustion pressure is applied. This contributes to fuel economy.

      A001MZCC01
      *a Bore Center *b Crankshaft Center
      *c Offset Crankshaft *d Center Crankshaft
      *e Maximum Pressure - -