Air scavenging for an opposed piston opposed cylinder free piston engine
US6941904B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2004 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Jun 28, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B71/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A free piston engine is configured with a pair of opposed engine cylinders located on opposite sides of a fluid pumping assembly. An inner piston assembly includes a pair of inner pistons, one each operatively located in a respective one of the engine cylinders, with a push rod connected between the inner pistons. An outer piston assembly includes a pair of pistons, one each operatively located, in a respective one of the engine cylinders, with at least one pull rod connected between the outer pistons. The pull rod extends through an outer pumping chamber in the fluid pumping assembly and forms a fluid plunger within this chamber. Each outer piston cooperates with an integrated scavenge pump in order to compress the charge air, thus significantly increasing the air charge density into the engine cylinders for each stroke of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.