Fuel metering system

In a fuel metering system for internal combustion engines of the type which includes an exhaust system, a suction tube, a fuel reservoir, a flow controlled fuel line leading from the fuel reservoir to the suction tube, a flow controlled air line and a measuring probe disposed in the exhaust system, with the fuel quantity metered out to the air stream in the suction tube depending on the pressures prevailing in the fuel reservoir and in the suction tube, and further on the output signal of the measuring probe, the improvement comprising:

• a magnetic valve to control the flow in said air line, said magnetic valve including a movable valve member in the form of a membrane which serves as the armature of said magnetic valve;
• means defining a space in which said magnetic valve is situated and in which the fuel line and the air line terminate;
• and means connected between said magnetic valve and said measuring probe so that said magnetic valve can be actuated by the output signal from said measuring probe, with said fuel line and said air line being disposed to communicate prior to entry into said suction tube, wherein the air and fuel lines include opposing ends defining valve seats between which said membrane separates and defines with said space defining means a fuel space from an air space.