Internal combustion engine
US5803026A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1997 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Mar 13, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine has at least one pair of first and second cylinders (12, 14) with the first (12) cylinder having a larger swept volume than the second cylinder (14) and respective first and second pistons (16, 18) reciprocable in the cylinders. The second piston (18) has a drive stem (234) and divides the second cylinder into a first volume (15a) containing the drive stem of the second piston and a second volume (15b) between the two pistons. The first cylinder (12) has an air inlet (25) and an exhaust outlet (12). A common combustion space (20) is formed between the pistons when the pistons are substantially at their inner dead center positions, the combustion space comprising the second volume (15b). The engine also has transfer means (38) enabling gas flow between the first and second volumes (15a, 15b) towards the end of the compression stroke of the second piston (18)., and inhibiting means for inhibiting movement of fuel/air mixture from the first volume into the second volume until towards the end of the compression stroke of the second piston. A fuel injector (34) provides fuel to the first volume (15a). The second piston has a drive means (500). A cavity (520…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.