OIL JET VALVE CONSTRUCTION/OPERATION[LF, L3]
id0111b5100500
Construction
• The oil jet valves are installed in the cylinder block (side of the main journal). The piston cooling efficiency by oilinjected from the nozzles has been improved thanks to the installation direction of the oil jet valves which arepointed toward the back surface of each piston.
• The oil jet valves have been designed to maintain optimum oil pressure in the engine by controlling the oilinjection according to the oil pressure applied to the check ball in the oil jet valves.
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1
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Cylinder liner
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2
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Engine front side
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3
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Oil jet valve
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4
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Cylinder block
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5
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Piston
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6
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Oil
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7
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Main journal
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Operation
• Oil pressure applied to the check-ball in the oil jet valve opens and closes the oil passage-way to the nozzleand controls oil injection starting and stopping.
• Oil pressure greater than the specified value applied to the check-ball in the oil jet valve opens the oil passage to the spring-pressed nozzle, starting injection. Conversely, oil pressure less than the specified value applied to the check-ball blocks the oil passage by spring force, stopping injection.
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1
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Nozzle
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2
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Oil jet valve body
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3
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Spring
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4
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Oil
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5
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Oil passage
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6
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Check ball
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