Piston cooling oil system with windage tray
US6742481B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Sep 23, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P11/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a preferred embodiment, a windage tray assembly is mounted to crankshaft bearing caps which connect with oil passages in the windage tray. The passages carry the oil through nozzles directed toward the interior of associated pistons. The arrangement utilizes the windage tray and bearing caps as carriers for piston cooling oil obtained from the bearing caps, which are already supplied with oil for lubricating the bearings. Thus, modifications of an engine design to install a piston cooling system are limited to redesign of the windage tray to a sandwich-like assembly and modification of the bearing caps to conduct oil from the bearings to the windage tray passages. To limit oil pumping energy, oil distribution holes in the bearing caps connect intermittently with crankshaft journal feed passages so the oil is distributed in individually timed streams or sprays directed toward the pistons for a short interval once every revolution of the engine crankshaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.