Apparatus for furnishing a signal indicative of the load of an i

Details Apparatus for furnishing a signal indicative of the load of an i Apparatus for furnishing a signal indicative of the load of an i

1980-06-18

1982-08-10

Myracle, Jerry W.

Measuring and testing

Vehicle drive train

Rear end

73717, G01M 1500

Patent

active

043431801

ABSTRACT:
The interior of a differential pressure cell is exposed to the pressure in the intake pipe of an internal combustion engine. An absolute pressure cell is exposed to the ambient air pressure. The movable membrane of the differential pressure cell carries a plate on which are mounted two permanent magnets whose North poles face one another. A Hall generator fastened to the center of the movable membrane of the absolute pressure cell moves in the gap between the two magnets. The effective magnetic field applied to the Hall generator thus varies with the relative position of the Hall generator and the magnets. Adjustment of the spring constants of the two membranes allows any linear combination of differential and absolute pressure to be formed. Embodiments of different complexity and different degrees of linearity are illustrated.

REFERENCES:
patent: 2070842 (1937-02-01), Reichel et al.
patent: 2907897 (1959-10-01), Sander
patent: 2932807 (1960-04-01), Bourns
patent: 3068700 (1962-12-01), Bourns
patent: 3196686 (1965-07-01), Cole
patent: 4131088 (1978-12-01), Reddy

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