Position sensor monitoring system

Details Position sensor monitoring system Position sensor monitoring system

1989-02-27

1990-05-01

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123479, 324549, 340438, F02D 1110, F02B 7708

Patent

active

049209396

ABSTRACT:
A condition monitoring system for a position sensor coupled to a control device in a throttle control system. The position sensor includes a potentiometer having a main resistor coupled across a source of electrical power and a wiper arm mechanically coupled to the control device and electrically coupled to the main resistor. An electrical signal is developed on the wiper arm which is directly proportional to the actual position of the control device. A sensing or monitoring resistor is connected in series between the main resistor and source of electrical power for providing a current measurement directly correlated with actual resistance of the main resistor. The voltage drop across the sense resistor is compared to a predetermined range for providing an indication of main resistor operation independently of wiper arm position.

REFERENCES:
patent: 4541386 (1985-09-01), Kishi et al.
patent: 4566418 (1986-01-01), Yamamoto et al.
patent: 4587615 (1986-05-01), Takahashi
patent: 4589401 (1986-05-01), Karim et al.
patent: 4640248 (1987-02-01), Stoltman

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