F - Mech Eng,Light,Heat,Weapons – 02 – D
Patent
F - Mech Eng,Light,Heat,Weapons
02
D
341/38.11
F02D 41/18 (2006.01) F02D 41/24 (2006.01) F02D 41/32 (2006.01)
Patent
CA 1286752
ABSTRACT Interpreted intake-manifold vacuum and engine speed are used to produce an electrical output signal that reflects throttle position. Since the device has no mechanical tie to the throttle, there is none of the hysteresis or mechanical wear that are char- acteristic of conventional throttle-position sensors. The device comprises a tachometer circuit which is modulated by the signal from a differential- pressure transducer, connected to track the instan- taneous hydraulic pressure drop across the engine throttle. The tachometer output controls the duty cycle of a pulse generator which, in turn, drives an output transistor; a reference potential is applied across the load resistor and emitter of this output transistor, and the output signal is obtained as a d-c control signal, upon filtering the signal from the collector of the output transducer. The transfer function of the device yields maximum output when there is little or no intake vacuum, e.g., at sustained high speed, and minimum output is obtained from minimum speed and maximum vacuum.
553166
Brunswick Corporation
Mitchell Richard J.
LandOfFree
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