Piston for a heat engine, heat engine comprising such a piston, and methods
US11098674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2018 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Jul 24, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J9/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Various implementations include a combustion engine piston, including a skirt in a counter-part and including a first contact area of the piston in the counter-part, a head which extends transverse to a central axis, and a ring carrier which comprises at least two lands and at least two grooves for receiving the rings, including a first land adjoining the head and a second land situated between the first land and the skirt, wherein the lands include at least one contact land having a diameter greater than a minimum diameter of the skirt to form a second contact area of the piston in the counter-part, and wherein at least one contact land comprises a friction-reducing surface coating, formed at least on a radial sector covering an angle of at least 30 degrees, and up to on a single sector covering an angle of 360 degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.