| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an oil jet device for an internal combustion engine which is capable of suppressing occurrence of a hammering noise.SOLUTION: When a difference between oil and water is a predetermined value or more and an engine operation region obtainable from an engine speed and an intake filling rate is an oil jet suspension region, an oil jet is carried out. This ensures a sufficient oil film between an inner wall surface of a cylinder bore and an outer surface of a piston so as to sufficiently produce a buffering effect owing to the oil film, thereby reducing a hammering noise.</p> |
