Circuit for generating a temperature compensated throttle advanc

Details Circuit for generating a temperature compensated throttle advanc Circuit for generating a temperature compensated throttle advanc

1975-04-22

1977-05-10

Cox, Ronald B.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123 32ED, F02P 504, F02B 300

Patent

active

040221709

ABSTRACT:
A circuit for generating a throttle advance signal for use in an electronic engine spark timing control system contains: a throttle position transducer circuit which develops a constant frequency pulse train wherein the width of the pulses is modulated in accordance with throttle position derived from a throttle position transducer; a pulse to analog conversion circuit with ambient air temperature compensation which converts the pulse train into a temperature compensated analog signal representative of throttle position; and a throttle rate circuit which monitors the rate of change of throttle position to provide a throttle rate signal whose sensitivity is inversely proportional to ambient air temperature but whose magnitude is independent of ambient air temperature. The throttle advance signal is a function of both the throttle position signal and the throttle rate signal. The throttle advance signal is used to adjust engine spark timing in accordance with throttle operation.

REFERENCES:
patent: 1882720 (1932-10-01), Arthur
patent: 3672345 (1972-06-01), Monpetit
patent: 3673989 (1972-07-01), Aono
patent: 3818877 (1974-06-01), Barrera
patent: 3861363 (1975-01-01), Williams
patent: 3935851 (1976-02-01), Wright

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