Piston assembly for free piston internal combustion engine
US6463903B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Aug 30, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B71/045
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A free piston internal combustion engine, particularly suitable for use in a vehicle, is provided with a combustion cylinder and a piston assembly. The piston assembly includes a piston and a plunger shaft. The piston is reciprocally movable within the combustion cylinder. The piston includes a crown, a skirt extending from the crown and having a piston ring groove therein, a hub attached to the plunger shaft, and at least one support block. Each support block is positioned adjacent to the crown and extends from the hub toward the skirt. Each support block, skirt and piston ring groove defines a cut-out there between. The cut-out provides mechanical support to the piston during acceleration, and also provides effective heat transfer for cooling the piston ring groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.