Apparatus for controlling the mixture composition in an internal combustion engine

In an apparatus for controlling the composition of a mixture delivered to a combustion chamber of an internal combustion engine which includes a plurality of operational parameter sensing means for controlling the quantity of fuel supplied to the engine as a function of said parameters, wherein said plurality of parameter sensing means includes an exhaust sensor, the improvement which comprises:

• an electrically charged storage means for storing an electrical quantity;
• charging source means, associated with said storage means and said plurality of operational parameter sensing means, for providing a charging current to charge said storage means, the initiation and duration of said charging current being controlled by said exhaust sensor, and the magnitude of said charging current being controlled by at least one of said operational parameter sensing means other than said exhaust sensor;
• and
• discharging source means, associated with said storage means and said plurality of operational parameter sensing means, for controlling a discharge current from said storage means to discharge said storage means, the initiation and duration of said discharge current being controlled by said exhaust sensor, and the magnitude of said discharge current being controlled by at least one of said operational parameter sensing means other than said exhaust sensing means.