Power assembly for internal combustion engine with in-cylinder deposit scraper
US7677217B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2007 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Jan 29, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F2001/006
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A power assembly for an internal combustion engine includes a cylinder with a circular wall defining a first inside diameter. A piston is reciprocably housed within the cylinder. An integral, unitary piston deposit scraper is formed in a portion of the circular wall of the cylinder by upsetting a portion of the metallic wall so as to configure a piston scraper with a second inside diameter which is less than the first inside diameter. The inside diameter of the piston scraper closely matches that of the outside diameter of the top land of the piston. As a result, the piston scraper removes combustion deposits from the piston each time it moves into the top dead center position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.