초록 ▼

An adaptive charge forming system for an internal combustion engine is disclosed which monitors a parameter of engine combustion efficiency, such as power output, and derives a signal indicating the direction and amplitude of power change. The fuel mixture control system responds to changes in power

An adaptive charge forming system for an internal combustion engine is disclosed which monitors a parameter of engine combustion efficiency, such as power output, and derives a signal indicating the direction and amplitude of power change. The fuel mixture control system responds to changes in power output, regardless of their source, to maintain the engine air/fuel ratio in a preferred region. In a preferred embodiment, engine crankshaft angular acceleration is monitored to maintain the air/fuel mixture at the lean limit. A stepping motor is used to control a value for bleeding additional air into the charge; a clock provides steady pulses to the motor, tending to lean the mixture, while enrichment is effected upon the detection of each weak combustion event. The clock frequency thus sets the equilibrium rate of weak combustion events, defining the optimal mixture to be supplied to the engine.

대표청구항 ▼

Apparatus for controlling valve means for altering the ratio of the fuel/air mixture supplied to an engine to equal an optimum ratio varying in accordance with the instantaneous power output of said engine, comprising: means for providing a first fixed signal for controlling said valve means to alte

Apparatus for controlling valve means for altering the ratio of the fuel/air mixture supplied to an engine to equal an optimum ratio varying in accordance with the instantaneous power output of said engine, comprising: means for providing a first fixed signal for controlling said valve means to alter said mixture in a first direction; means for providing a second variable signal proportional to departure of said mixture from said optimum ratio to cause said valve means to alter said mixture in a second opposite direction; and means for controlling said valve means adapted to alter said ratio at a rate proportional to the difference between said first and second signals.