| 摘要 |
An oil supply apparatus for cooling a piston is provided to raise the cooling efficiency of a piston by properly injecting lubrication oil to cool the piston when heat is excessively transferred to the piston. An oil supply apparatus for cooling a piston comprises a balance weight(200) compressed as a connecting rod is driven. A pressure-forming member forms an oil injection pressure as the balance weight is compressed. An oil injection member(330) is integrally formed with the pressure-forming member to inject oil to an oil gallery by the oil injection pressure. The pressure-forming member includes a push rod(210), a first plunger(220) integrally formed with the push rod, a first spring(230) elastically supporting the first plunger, a first cylinder(240), an oil pipe(250), a second cylinder(260), a second plunger(270) and a second spring(280). The first plunger slides in the first cylinder.
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