Twin-piston engine
US5722355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Sep 27, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B2075/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A twin-piston engine (1), i.e., a crankcase scavenged two-stroke internal combustion engine comprising two pistons (2,3) travelling in essentially the same direction, and wherein one (4) of the cylinder bores, the exhaust bore (4), contains all exhaust ports (6), and the other cylinder bore (5), the scavenging cylinder bore, contains a number of scavenging ports (7,8,9). All suction ports (16) of the engine are positioned in the scavenging cylinder bore and a fuel supply device (20), such as a carburetor, is connected to the suction port/ports (16) and is positioned essentially on the line of extension (29) passing through the cross-sectional centers of the two cylinder bores whereas the exhaust port (6) is positioned essentially in alignment with the extension of that same line (29) in the opposite direction, and in that the mouth of the exhaust port (6) on the external face of the cylinder is provided with an essentially direct-mounted muffler (25) whereby the fuel supply device (20) and said muffler (25) will be positioned on opposite sides of the cylinder body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.