ENGINE UNIT


  1. CONSTRUCTION


    1. The cylinder head structure is simplified by separating the cam journal portion (camshaft housing sub-assembly) from the cylinder head sub-assembly.

    2. The cylinder head sub-assembly, which is made of aluminum, contains pentroof-type combustion chambers. The spark plug is located in the center of the combustion chamber in order to improve the engine's anti-knock performance.

    3. The shape of the intake ports, the combustion chambers and the injector fuel spray pattern have been optimized to enhance combustion efficiency.

    4. By integrating part of the EGR circuit into the cylinder head sub-assembly, low exhaust gas temperatures and low fuel consumption are achieved.

    5. A laser clad valve seat is used, thus enabling the shape of the intake port to be optimized, increasing the tumble flow and intake air flow volume, improving engine power and fuel economy.

    6. The valve lash adjuster assemblies are installed in the upper part of the cylinder head sub-assembly, creating a structure where the oil passage supplying oil to the valve lash adjuster assemblies are combined with the interior of the cylinder head sub-assembly.

      B00238IC01
      *1 No. 1 Camshaft Bearing Cap *2 No. 2 Camshaft Bearing Cap
      *3 No. 3 Camshaft Bearing Cap *4 No. 4 Camshaft Bearing Cap
      *5 Camshaft Housing Sub-assembly *6 Cylinder Head Sub-assembly
      *7 Intake Valve *8 Exhaust Valve
      *a View from Bottom Side *b A-A Cross Section
      *c Spark Plug Hole *d Exhaust Side
      *e Intake Side *f Laser Cladded Valve Seat
      *g Tumble Flow *h 41°

    7. By optimizing the length and diameter of the exhaust port and by cooling the exhaust gas using the water jackets built into the cylinder head sub-assembly, engine performance and exhaust cooling performance have been enhanced.

      B002328C01
      *1 Cylinder Head Sub-assembly *2 Exhaust Manifold Assembly
      *a Exhaust Port - -
      B0082R6 Engine Front - -

    8. A two part water jacket is used to optimize coolant volume and coolant flow speed, realizing high cooling performance.

      B00237WC01
      *a Water Jacket (Upper Side) *b Water Jacket (Lower Side)
      *c Sub-water Jacket - -