OIL JET VALVE CONSTRUCTION/OPERATION[MZ-CD 1.6 (Y6)]
id0111d2100500
Construction
• The oil jet valves are installed in the cylinder block with banjo bolts. The oil jet nozzles are installed pointed toward the back surface of each piston and cool the piston skirts.
• The banjo bolts connect the oil jet nozzles with the engine lubrication system. They are equipped with integral valves which maintain optimum oil pressure in the engine by controlling the oil injection according to the pressure applied to them.
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1
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Engine front side
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2
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Oil jet valve
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3
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Oil hole (to nozzle)
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4
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Oil pressure
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5
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Oil hole (banjo bolt to nozzle)
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6
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Banjo bolt
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7
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Nozzle
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Operation
• Oil pressure applied to the valve in the banjo bolt opens and closes the oil passage-way to the nozzle and controls oil injection starting and stopping.
• Oil pressure greater than the specified value applied to the valve in the banjo bolt opens the oil passage to the spring-pressed nozzle, starting injection. Conversely, oil pressure less than the specified value applied to the valve blocks the oil passage by spring force stopping injection.
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1
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Cylinder block main gallery
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2
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Banjo bolt (valve built-in)
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3
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Engine oil
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4
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Back side of piston
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