| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus for cooling a piston for an internal combustion engine, which effectively reduces the probability of occurrence of a preignition in a low rotational high load range where a preignition is more likely to occur. <P>SOLUTION: The apparatus for cooling a piston for an internal combustion engine, includes an oil jetting mechanism 36 that can jet a lubricant oil for lubricating an internal combustion engine 10 toward a piston 34. The oil jetting mechanism 36 is controlled when the internal combustion engine 10 is operated in the predetermined low rotational high load range where a preignition is more likely to occur so that the oil jetting mechanism jets the lubricant oil toward the piston 34 only in an expansion stroke. <P>COPYRIGHT: (C)2012,JPO&INPIT |
