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.

    2. The cylinder head, 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. A taper squish combustion chamber is used to improve anti-knock performance and intake efficiency. In addition, engine performance and fuel economy are improved.

    4. The port configuration is an efficient cross-flow type in which the intake ports face the inside of the V bank and the exhaust ports face the outside.

    5. The intake ports for each intake valve are independent, and feature a narrow-diameter construction. The exhaust ports have a siamese construction to enhance low- to medium-speed torque.

    6. Upright intake ports are used to improve the intake efficiency.

      A01MQQ9C01
      *1 Intake Valve *2 Spark Plug Hole
      *3 Exhaust Valve *4 Camshaft Housing Sub-assembly
      *a Bottom Side View *b A - A Cross Section
      *c Taper Squish Area - -
      B003SGU Intake Port B003SNU Exhaust Port

      Tech Tips

      The difference between an independent type intake port and a siamese type one is shown in the illustration.

      A01MR3WC01
      *A Independent Type *B Siamese Type
      B003SGU Intake Port - -