F - Mech Eng,Light,Heat,Weapons – 02 – P
Patent
F - Mech Eng,Light,Heat,Weapons
02
P
317/5.5
F02P 5/14 (2006.01) F02P 5/155 (2006.01)
Patent
CA 1054214
CIRCUIT FOR GENERATING A TEMPERATURE COMPENSATED THROTTLE ADVANCE SIGNAL HAVING POSITION AND RATE COMPONENTS ABSTRACT A circuit for generating a throttle advance signal for use in an electronic engine spark timing controller 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 con- verts 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 ad- vance signal is used to adjust engine spark timing in accordance with throttle operation.
248956
Caron Laverne A.
Crall Frederick W.
LandOfFree
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