Driveline vibration system diagnostics

Details Driveline vibration system diagnostics Driveline vibration system diagnostics

1997-10-31

1999-09-21

Chapman, John E.

Measuring and testing

Vibration

Sensing apparatus

73660, 701111, G01M 1302

Patent

active

059556749

ABSTRACT:
A diagnostic driveline vibration analyzing tool for measuring and characterizing the torsional vibration of a rotating component such as a transmission output shaft in a vehicle driveline. An electronic control unit and sensor cooperate to measure speed fluctuations occurring between the passing of adjacent teeth of a rotating gear. These time measurements are then filtered using an order tracked pass band filter to isolate frequencies of interest the results of which are then used to calculate a total torsional energy level by taking the root mean square of the filtered signal over a predetermined period of time. The total torsional energy level is then compared to a predetermined maximum amplitude and if the total torsional level exceeds this predetermined maximum amplitude then the operator is notified through a display device.

REFERENCES:
patent: 4317371 (1982-03-01), Wolfinger
patent: 5390545 (1995-02-01), Doan
patent: 5686669 (1997-11-01), Hernandez et al.
patent: 5691469 (1997-11-01), Mezger et al.
patent: 5893042 (1999-04-01), Lohmann et al.

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