Piston Cooling Configuration Utilizing Lubricating Oil From Bearing Reservoir In An Opposed-Piston Engine

摘要

Pressurized lubricating oil is accumulated in the bearings of opposed pistons and accumulated oil is dispensed therefrom for bearing lubrication and also for cooling the undercrowns of the pistons by jets of oil emitted from the bearings.

主权项

1. A piston cooling configuration for an opposed-piston engine, comprising:
a piston with crown having an end surface shaped to form a combustion chamber with an end surface of an opposing piston; the crown including an undercrown: a bearing mounted in the piston between the undercrown and a small end of a connecting rod; the bearing including a wristpin; an oil reservoir in the wristpin in fluid communication with one or more wristpin oil outlet passages positioned to pass oil through the wristpin into a lubrication interface between the wristpin and a bearing surface; a wristpin oil inlet passage in fluid communication with the reservoir, and, at least one cooling jet outlet on one of a fixed part of the bearing and a moving part of the bearing; in which the cooling jet outlet is in fluid communication with the oil reservoir and is aimed toward an undercrown portion.