Two-stroke-cycle uniflow spark-ignition engine
US4977875A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1989 |
| Grant date | Dec 18, 1990 |
| Priority date | — |
| Expiry date | Apr 18, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A two-stroke-cycle uniflow spark-ignition engine. A fluid sucked and pressurized by a compressor driven by the engine is delivered to an annular scavenging chamber formed in a cylinder around the entire circumference thereof, so as to be accumulated therein. The fluid within the annular scavenging chamber is discharged therefrom, through a plurality of scavenging ports formed in the cylinder and capable of opening into a cylinder chamber toward the end of a descending stroke of a piston, and/or into a recess which is above the piston, the discharged fluid serving as a scavenging fluid that flows generating a swirling uniflow. A mixture compressed within the cylinder chamber during an ascending stroke of the piston is ignited by an ignition plug for combustion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.