Arrangement for cooling pistons and cylinder sleeves
US4608947A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1985 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Jul 5, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F3/22
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An arrangement for cooling the pistons and cylinder sleeves of an internal combustion engine. An annular cooling chamber is provided in the piston, and is open along the circumferential surface of the piston in the direction toward the cylinder sleeve. This cooling chamber is divided into subchambers over a portion of its axial height. Cooling medium is supplied into a given subchamber, while cooling medium is withdrawn in the adjacent subchamber. The portion of the cooling chamber which is free of partitions may be embodied as an annular groove which is disposed radially inwardly of the piston rings. The particular cooling effect is essentially brought about by the back and forth movement of the cooling medium not only axially but also in the circumferential direction in the annular groove. In so doing, the cooling medium wets the cylinder sleeve during the up and down movement of the piston. With a great enough quantity of cooling medium, external cooling of the cylinder sleeve can be either entirely or partially dispensed with. An axially extending flange-like member can be provided as an economical replacement for an oil wiping ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.