| 摘要 |
PURPOSE:To enable a quantity of oil to be high accurately regulated on the basis of the temperature of oil, by providing a shape memory alloy-made coiled plate valve, spread and contracted with a preset temperature in necessity for injecting lubricating oil from a nozzle being as a border, to be arranged inside a cylinder surface communicating with a lubricating oil passage. CONSTITUTION:A bolt 2 is screwed by a threaded part 14 so as to tighten a cylindrical joint part 13 in the base end of a nozzle 1 to be attached to a crankcase 3. Here the bolt 2 provides inside a bottommed cylinder surface 15 communicating with a lubricating oil passage 4 further integrally provides a small diameter protrusion 16 in the central bottom part. While the cylinder surface 15 provides in its central bottom half part a plurality of communication holes 17 radially in a direction at a right angle with the cylinder surface 15, further each communication hole 17 communicates with a passage 19 in the nozzle 1 via an annular groove 18 in the joint part 13. And a shape memory alloy-made coiled plate valve 20, being brought into forced contact with the cylinder surface 15 at a temperature less than the preset value in necessity for injecting lubricating oil toward a piston from the nozzle 1, closes the communication hole 17 to be blocked.
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