Two-stroke internal combustion engine with charging cylinder
US5755191A · kind A · utility
Inventor
Key dates
| Filing date | Nov 26, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Nov 26, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B25/20
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention concerns a two-stroke internal-combustion engine with a charging pump, an outlet channel controlled by the main piston being subjected to additional control by the charging-pump plunger. Circulation losses are minimized and a higher means working pressure is obtained by early mechanical closure of the outlet channel by means of the charging-pump plunger or by injecting a pulse of exhaust gases into the outlet channel in the direction opposite to the direction of flow or by injecting part of the intake charge through the outlet channel into the main cylinder. In addition, the formation of oxides of nitrogen is reduced by controlled exhaust gas retention at the combustion stage. The invention also allows a catalytic converter to be used if required, since an increase in the oxygen concentration owing to circulation losses in the outlet channel is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.