Two-stroke engine comprising a muffler
US8844672B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2012 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Mar 7, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention relates to a two-stroke engine for an engine-driven tool, including a muffler, especially for a manually operated engine-driven tool such as a maintenance device for gardens or green spaces, for a hand-held tool such as a chain saw, a hand-held circular saw or an angle grinder or for a small motorcycle, a boat engine and the like, wherein the flow channel between the muffler inlet and the first chamber is formed so as to promote flow such that the exhaust gas entering the muffler inlet mainly enters the first chamber due to its inertia and once the first chamber is full flows back again. The counterpressure of the exhaust gas is produced at a point in time in which the piston releases the outlet and the fuel-air mixture at least for its most part has entered the combustion chamber through the at least one transfer passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.