Patent ID: 8394165
Filing Date: 2013-03-12
Classification: F02M

Abstract:
1. An arrangement of at least one air filter and at least one diaphragm carburettor for providing a fuel/air mixture, the diaphragm carburettor connected to a clean-airside of the at least one air filter by at least one suction port, the diaphragm carburettor having a regulating chamber with a fuel chamber connected to the suction port, in which the fuel chamber is charged with underpressure from the suction port and is separated from at least one compensation chamber by at least one regulating diaphragm configured to control fuel supply to the fuel chamber, wherein the compensation chamber is connected the clean air side of the air filter by at least one compensation path, comprising: at least one control and/or regulating element associated with the compensation path, the at least one control and/or regulating element having at least one path element connected to the compensation path and movable relative thereto configured to alter the dimensioning in the length and/or diameter of the compensation path between at least two different stages or switching positions, wherein the compensation path connects the compensation chamber to the clean air side of the air filter in either stage or switching position: characterized in that the control and/or regulating, element is configured so as to alter the dimensioning of the compensation path as a function of frequency and/or amplitude of resonance vibrations occurring in a pressure source and/or as a function of the operating behaviour of the diaphragm carburettor, wherein the operating behaviour comprises the load and/or rotation speed of a two-stroke engine associated with the diaphragm carburettor, the intensity of the underpressure in the suction port and/or the pressure in the pressure source.