Adaptive charge forming system for controlling the air/fuel mixture supplied to an internal combustion engine

Apparatus for the controlling of the ratio of the fuel/air mixture supplied to an internal-combustion engine, comprising:

• means for providing a first signal indicative of the power output by said engine;
• means for differentiating said first signal and for producing a second signal indicative of the rate of change of said first signal;
• and
• means for altering said fuel/air ratio in response to said second signal exceeding a predetermined level, wherein said means for altering said fuel/air ratio is controlled to alter said ratio at a rate dependent on the amount by which said second signal exceeds said predetermined level.

Apparatus for controlling the fuel/air ratio of the charge supplied to an internal combustion engine, comprising:

• valve means for controllably varying the ratio of the charge;
• electric servo motor means for controlling said valve means;
• first signal source means for applying a first bias signal to said servo motor for biasing variation of the ratio of said charge in a first direction;
• and
• second signal source means for applying a varying second signal, generated in response to sensed engine operating parameters, to said servo motor to cause variation of the ratio of said charge in a second direction opposite said first direction,
• whereby equilibrium operation is reached by said servo motor means when said first bias signal is substantially equalled by said varying second signal, thus controlling said ratio in order to control said operating parameters.

Apparatus for controllably varying the fuel/air ratio of the charge supplied to an internal combustion engine, comprising:

• means for detecting weak combustion events, and outputting first pulses in response thereto;
• means for generating a steady stream of pulses;
• and
• means for varying the air/fuel ratio of said charge in response to said pulses, said first pulses being applied to vary said ratio in a first sense and said stream of pulses applied to vary said ratio in the opposite sense, whereby the fuel/air ratio is urged toward an equilibrium point at which the average rate of said weak combustion events is substantially equal to the rate of said steady stream of clock pulses.