Adaptive charge forming system for controlling the air/fuel mixt

Details Adaptive charge forming system for controlling the air/fuel mixt Adaptive charge forming system for controlling the air/fuel mixt

1980-07-28

1983-01-18

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Including means responsive to instantaneous change in engine...

123419, 123585, F02B 3300, F02M 700

Patent

active

043687075

ABSTRACT:
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.

REFERENCES:
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patent: 3789816 (1974-02-01), Japlin
patent: 4015569 (1977-04-01), Leshner et al.
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patent: 4026251 (1977-05-01), Schweitzer
patent: 4099493 (1978-07-01), Latsch
patent: 4104990 (1978-08-01), Frobenius
patent: 4161162 (1979-07-01), Latsch
patent: 4231335 (1980-11-01), Hallberg
patent: 4232643 (1980-11-01), Leshner

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