Self-standardizing pressure sensor for use in an electronic fuel

Details Self-standardizing pressure sensor for use in an electronic fuel Self-standardizing pressure sensor for use in an electronic fuel

1978-10-02

1980-07-08

Myracle, Jerry W.

Measuring and testing

Fluid pressure gauge

Diaphragm

73 4V, 123445GS, G01L 708

Patent

active

042111196

ABSTRACT:
A self-standardizing pressure sensor (60) for use with an electronic fuel control system of an internal combustion engine. The sensor (60) includes a body (100) having first and second external ports (120, 122) for sensing manifold absolute pressure (MAP) and ambient atmospheric pressure (AAP), respectively. An internal valve (110) within the body (100) is biased to normally register with the MAP port (120), but is actuatable to register with the AAP port (122). The valve (110) includes an internal passage (126) which communicates whichever of the ports (120, 122) is selected to an internal pressure chamber. One wall of the chamber is defined by a flexural diaphragm (144). Flexing of the diaphragm is transmitted to an electromechanical transducer (172) which produces an output signal representative of the pressure in the internal chamber. A normal force bias (146) is applied to the diaphragm (144), but is temporarily removed by actuation of the internal valve (110) to effectively unload the diaphragm (144) to permit standardization of the sensor (60).

REFERENCES:
patent: 2515259 (1950-07-01), O'Brien et al.
patent: 3541849 (1970-11-01), Corbett
patent: 3583374 (1971-06-01), Scholl et al.
patent: 3651791 (1972-03-01), Kobayashi
patent: 3730146 (1973-05-01), Moulds et al.
patent: 3891870 (1975-06-01), Corbett
patent: 3894435 (1975-07-01), Shimada et al.
patent: 3942364 (1976-03-01), Bunker
patent: 4015571 (1977-04-01), Stumpp
patent: 4067241 (1978-01-01), Corbett

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