Patent ID: 6769396
Filing Date: 2004-08-03
Classification: F02B,F02D,F02M,Y02T

Abstract:
A diaphragm carburetor for an internal combustion engine that operates with scavenging, comprising:a carburetor housing in which is formed an intake channel portion; a butterfly valve disposed in said intake channel portion and rotatably held via a butterfly valve shaft, wherein fuel-supplying channels open into said intake channel portion in a vicinity of said butterfly valve; at least one air channel for supplying additional air for combustion, wherein said at least one air channel is provided with an air valve that is rotatably held via an air valve shaft and wherein said butterfly valve and said air valve are movable, in a closing direction, from an open position into a closed position, and in an opening direction, from said closed position into said open position; mechanical coupling means for mechanically coupling said air valve over an angular range with a movement of said butterfly valve, wherein said mechanical coupling means includes a butterfly valve lever that is fixedly connected with said butterfly valve shaft, and also includes an air valve lever that is fixedly connected with said air valve shaft; and a driver member disposed on one of said levers wherein at least in a given angular range said driver members slides on the other of said levers between an outer contact point and an inner contact point.