ENGINE UNIT


  1. CONSTRUCTION


    1. The ventilation hose, No. 2 ventilation hose and ventilation valve sub-assembly are used for blow-by gas ventilation control. Blow-by gas with a large quantity of hydrocarbons is prevented from being discharged into the atmosphere by directing the blow-by gas into the intake system and combusting the gas. A new reflux flow system has been used to intake fresh air from the air cleaner hose assembly via the cylinder head cover sub-assembly and to direct blow-by gas to the intake air surge tank assembly via the cylinder head cover sub-assembly.

    2. During light engine loads, blow-by gas is suctioned through the ventilation valve sub-assembly into the intake manifold and will be combusted. Fresh air is pulled into the crank case via the cylinder head cover sub-assembly in order to balance the crank case pressure.

    3. During high engine loads, blow-by gas is forced through the ventilation valve sub-assembly and No. 2 ventilation hose into the intake manifold and will be combusted.

    4. Blow-by gas is channeled through the cylinder block sub-assembly, cylinder head sub-assembly and cylinder head LH and excellent oil separation and a reduction in oil loss via the blow-by gas is achieved.

      A004C0EC01
      *1 Ventilation Valve Sub-assembly *2 Ventilation Hose
      *3 No. 2 Ventilation Hose - -

      Figure 1. PCV Passage Diagram

      A004C2EC01
      *1 Air Cleaner Hose Assembly *2 Intake Air Surge Tank Assembly
      *3 Ventilation Valve Sub-assembly *4 Oil Separator
      *5 Cylinder Head Cover Sub-assembly *6 Cylinder Head Cover Sub-assembly LH
      *7 Oil Pan Sub-assembly *8 Cylinder Block Sub-assembly
      *a Fresh Air *b Blow-by Gas
      *c Blow-by Gas (High Engine Loads) - -