Control diaphragm for diaphragm carburetor

A control diaphragm for controlling a supply of fuel in a diaphragm carburetor of an internal combustion engine, comprising a central sensing region, a functional region enclosing the sensing region concentrically and a peripheral fastening border for fastening the control diaphragm in the diaphragm carburetor;

• wherein, in the installed state, the control diaphragm closes a control chamber of the diaphragm carburetor in a sealing manner and is operatively connected via the central sensing region to a control lever of the diaphragm carburetor arranged in the control chamber, which control lever senses the axial deflection of the sensing region in a manner which is dependent on an operation-induced pressure change in the control chamber;
• wherein:
• the control diaphragm consists in one piece of temperature-resistant and fuel-resistant, non-elastomeric plastic;
• the functional region is constituted by a multiplicity of concentric corrugations between the fastening border and the sensing region, wherein the outermost concentric corrugation directly adjoins the fastening border and the radius of the outermost concentric corrugation essentially corresponds to the radius of the control chamber;
• the sensing region directly adjoins the innermost concentric corrugation of the functional region and the radius of the sensing region corresponds to 5 to 25% of the outer radius of the functional region;
• and
• the sensing region includes radial reinforcing ribs and/or reinforcing corrugations.

A diaphragm carburetor having a control diaphragm, the control diaphragm comprising:

• a central sensing region, a functional region enclosing the sensing region concentrically and a peripheral fastening border for fastening the control diaphragm in the diaphragm carburetor,
• wherein, in the installed state, the control diaphragm closes a control chamber of the diaphragm carburetor in a sealing manner and is operatively connected via the central sensing region to a control lever of the diaphragm carburetor arranged in the control chamber, the control lever sensing the axial deflection of the sensing region in a manner which is dependent on an operation-induced pressure change in the control chamber;
• wherein the control diaphragm consists in one piece of temperature-resistant and fuel-resistant, non-elastomeric plastic;
• wherein the functional region is constituted by a multiplicity of concentric corrugations between the fastening border and the sensing region, wherein the outermost concentric corrugation directly adjoins the fastening border and the radius of the outermost concentric corrugation essentially corresponds to the radius of the control chamber;
• wherein the sensing region directly adjoins the innermost concentric corrugation of the functional region and the radius of the sensing region corresponds to 5 to 25% of the outer radius of the functional region;
• and
• wherein the sensing region includes means for reinforcing the control diaphragm.