Method and system for evaluating a signal from a vibrationally-s

Details Method and system for evaluating a signal from a vibrationally-s Method and system for evaluating a signal from a vibrationally-s

1993-07-28

1994-10-11

Chilcot, Jr., Richard E.

Measuring and testing

Fluid pressure gauge

Combined

73509, 73723, G01L 900

Patent

active

053536444

ABSTRACT:
The signal from a vibrationally-sensitive pressure sensor is both low-pass filtered and band-pass filtered. The low-pass-filtered portion is employed as a pressure-measuring signal, while the band-pass filtered portion is used as an acceleration-measuring signal. The pressure sensor is preferably installed in the tank-venting installation of a motor vehicle to measure the pressure differential relative to the surroundings. The acceleration-measuring signal is used to stop a recognition of engine misfiring, as soon as a rough road surface is recognized as a result of this signal.

REFERENCES:
patent: 3978731 (1976-09-01), Reeder et al.
patent: 4984467 (1991-01-01), Haefner

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