Stratified scavenging two-cycle engine
US6240886A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention is a stratified scavenging two-cycle engine which can make exhaust gas cleaner. For this purpose, in a stratified scavenging two-cycle engine, which includes a scavenging flow passage (3) to connect a cylinder chamber (4a) and a crank chamber (1a) and an air flow passage (2) connected to the scavenging flow passage (3), is constructed so that pressure reduction in a crank chamber (1a) following an upward movement of a piston (7) permits air to be drawn into the scavenging flow passage (3) from the air flow passage (2) and a scavenging port (3a), at which the scavenging flow passage (3) is opened to a cylinder inner surface (4b), is not fully obstructed by a side wall of the piston (7) and communicates with the crank chamber (1a).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.