ENGINE UNIT


  1. CONSTRUCTION


    1. A spiny type liner, which has an irregularly shaped outer casting surface, is used to enhance the adhesion between the liners and the 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.

    2. V-shaped cooling passages are drilled between each bore to provide increased cooling to the upper part of the cylinder bore which is most susceptible to heat. This allows heat to be more evenly distributed around the cylinder bore walls. As a result, resistance to knocking has been enhanced, and by minimizing thermal deformation of the areas between each cylinder bore, friction has been also minimized ensuring high performance and fuel economy.

      A01RGVMC01
      *1 Cylinder Block Sub-assembly *2 Spiny-type Liner
      *a Irregularly shaped outer casting surface of liner *b A-A Cross Section
      *c Drilled V-shaped Passage - -

    3. Through the use of an offset crankshaft, the centerline of the cylinder bores is shifted 8 mm (0.315 in.) towards the exhaust 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.

      A01RGYEC02
      *a 8 mm (0.315 in.) *b Bore Centerline
      *c Crankshaft Centerline *d Offset Crankshaft
      *e Non-offset Crankshaft *f Maximum Pressure