БЛОК ДВИГАТЕЛЯ


  1. CONSTRUCTION


    1. The cylinder block assembly is made of aluminum alloy.

    2. A water passage is provided between the cylinder bores. By allowing the water to flow between the cylinder bores, this construction enables the temperature of the cylinder walls to be kept uniform.

    3. The liners are the spiny-type, which are 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 assembly. The enhanced adhesion helps improve heat dissipation, resulting in a lower overall temperature and reduced heat deformation of the cylinder bores.

    4. Crankshaft bearing caps with cylinder block lower cases are used to reduce noise and to increase the coupling rigidity with the crankshaft.

    5. Cast-iron is used as a material for part of the bearing journal of the crankshaft bearing cap, thus helping prevent deformation caused by high loads from the crankshaft.

    6. Plastic region tightening bolts are used for tightening the crankshaft bearing cap.

      A00YYDBC01
      *1 Crankshaft Bearing Cap *2 Cylinder Block Lower Case
      *a Water Passage *b Irregularly Shaped Outer Casting Surface of Liner
      *c Liner *d A - A Cross Section

      Tech Tips

      Because the liner is thin, reboring is not possible.

    7. Air passage holes are provided on bulkheads of the cylinder block assembly and cylinder block lower case. As a result, the air at the bottom of the cylinder flows smoother, and pumping loss (back pressure at the bottom of the piston generated by the piston's reciprocating movement) has been reduced to improve the engine's output.

      A00YYGAC01
      *1 Cylinder Block Assembly *2 Cylinder Block Lower Case
      *a Air Passage Hole - -