Two-stroke otto cycle engines
US4903482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1989 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Apr 26, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A two-stoke engine comprises a cylinder accommodating a piston and having an air inlet port and an exhaust port. The exhaust port communicates with an exhaust system which includes a reduction catalyst and an oxidation catalyst. The exhaust system includes two exhaust flow paths in parallel, the first of which includes the reduction catalyst and the second of which bypasses the reduction catalyst, the downstream ends of the two flow paths being connected together upstream of the oxidation catalyst. The exhaust port is controlled by the piston or by poppet valves so that as the piston performs its downstroke the initial flow of exhaust gas is substantially through the first flow path and the subsequent flow of exhaust gas is substantially through the second flow path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.