LUBRICATION SYSTEM


  1. CONSTRUCTION


    1. Oil Pump (Models with DPF)


      1. The trochoidal type oil pump is driven by the crankshaft, and fits compactly inside the oil pan.

        A01UWASE03
        Text in Illustration
        *1 Oil Pressure Switching Valve *2 Crankshaft
        *3 Oil Pump *4 Relief Valve

    2. 2-stage Hydraulic System (Models with DPF)


      1. A 2-stage hydraulic system that allows the engine oil pressure to be controlled according to the vehicle driving conditions has been adopted. Therefore, energy loss due to the driving of the oil pump has been reduced and fuel economy has been improved.

        High pressure operation As oil is not supplied to the back of the sleeve valve, the oil discharge pressure pressures the sleeve valve downward and lowers the relief hole position. Therefore, the valve opening pressure becomes high.
        Low pressure operation As oil is supplied to the back of the sleeve valve, the sleeve valve is pushed upward and the relief hole position is raised. Therefore, the valve opening pressure becomes low.
        A01UW03E06
        A01UVVJE05
        Text in Illustration
        *A High Pressure (OSV : Off) *B Low Pressure (OSV : On)
        *1 Oil Pressure Switching Valve (OSV) *2 Sleeve Valve
        *3 Oil Pump *4 Relief Valve Spring
        *5 Relief Valve - -
        *a to Engine Section *b from Oil Pan
        *c Oil pressure to depress the relief valve: HIGH *d Bunk-up the relief valve by back pressure
        *e Oil pressure to depress the relief valve: LOW - -

    3. Oil Jet (No. 1 Oil Nozzle Sub-assembly)


      1. Oil Jet (No. 1 oil nozzle sub-assembly) for cooling and lubricating the pistons are provided in the cylinder block sub-assembly.

      2. These oil jet (No. 1 oil nozzle sub-assembly) contain a check valve to prevent oil from being fed when the oil pressure is low. This prevents the overall oil pressure in the engine from dropping.

        A01UW96E05
        Text in Illustration
        *1 Oil Jet (No. 1 Oil Nozzle Sub-assembly) *2 Check Ball
        *a Oil Jet (No. 1 Oil Nozzle Sub-assembly) Cross Section - -
        A01UWJU Oil - -

    4. Oil Filter


      1. An oil filter with a replaceable oil filter element is used. The oil filter element uses a high-performance filter paper to improve filtration performance. It is also combustible for environmental protection.

      2. A plastic oil filter cap assembly is used for weight reduction.

        A01UW7XE03
        Text in Illustration
        *1 Oil Filter Bracket Sub-assembly *2 Oil Filter Element
        *3 O-ring *4 Oil Filter Cap Assembly

        Tech Tips

        The engine oil maintenance interval for a model that has an oil filter with a replaceable oil filter element is the same as that for a conventional model.