Patent ID: 8172038
Filing Date: 2012-05-08
Classification: F01N,F02B,Y02T

Abstract:
1. A silencer for a motor device with a two-stroke engine connected to an outlet of a combustion chamber of the engine, comprising: a first chamber and a second chamber, wherein the second chamber is formed surrounding the first chamber by a wall of a silencer housing such that the first chamber is enclosed by the second chamber; means for directing substantially all exhaust gas from the outlet of the combustion chamber into the first chamber and by-passing the second chamber such that the predominant part of the exhaust gas flows into the first chamber before flowing into the second chamber, said means for directing comprising a single, undivided flow channel extending from the outlet concentrically about a channel axis and into the first chamber, characterized in that the flow channel is flow-favourably shaped in a straight line such that exhaust gas that flows out of the outlet predominantly flows into the first chamber because of its mass inertia; and means for redirecting the exhaust gas from the first chamber through the flow channel to the second chamber after filling the first chamber and forming a back pressure in the direction of the combustion chamber, said means for redirecting comprising a main outlet in the flow channel forming a flow connection between the flow channel and the second chamber, said main outlet comprising a pipe section oriented substantially perpendicular to the channel axis and forming a T-shaped connection with the flow channel.