US6128959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driveline vibration analyzer
Assignee: Eaton Corp
•
Filing: 1998-08-13
•
Granted: 2000-10-10
•
Expires: 2018-08-13
Abstract
Abstract A diagnostic driveline vibration analyzing tool for measuring and characterizing the torsional vibrations 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 the basis for displacement, velocity and acceleration calculations which, combined with driveshaft rotational order information, can be used to pinpoint the source of excessive driveline torsional vibrations.
Inventors
- 👤 Kevin M. McGovern
- 👤 John J. Bair
- 👤 Anthony N. West
- 👤 David S. Totten
- 👤 David W. Malaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:43
CPC Classifications
G; G01; G01H; G01H17/00; G01M; G01M13/00; G01M13/02; G01M13/028; B; B60; B60K; B60K17/00; B60K17/22; G01H1/00; G01H1/003; G01M17/00; G01M17/007; G01P; G01P15/00; G01P15/02; G01P15/08; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/4802
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A tool for measuring and analyzing the order based torsional vibration of a rotating component in a vehicle driveline comprising: a sensor for measuring an instantaneous speed of a driveline component under test and generating speed signals; a processor electrically coupled to said sensor for receiving said speed signals from said sensor and for transforming said speed signals into order domain and for processing said speed signals into rotational acceleration measurements as a function of harmonic order, said processing including calculating the amplitudes of said rotational acceleration measurements at each of one or more rotational orders; and display means for displaying said amplitudes of said rotational acceleration measurements with their respective rotational orders.
Claim 2
Dependent Claim
113 words
A tool for measuring and analyzing the order based torsional vibration of a rotating component in a vehicle driveline comprising: a sensor for measuring an instantaneous speed of a driveline component under test and generating speed signals; a processor electrically coupled to said sensor for receiving said speed signals from said sensor and for transforming said speed signals into order domain and for processing said speed signals into rotational acceleration measurements as a function of harmonic order, said processing including calculating the amplitudes of said rotational acceleration measurements at each of one or more rotational orders; and display means for displaying said amplitudes of said rotational acceleration measurements with their respective rotational orders.
Claim 3
Dependent Claim
18 words
The tool of claim 1, wherein said rotating component in a vehicle driveline is a transmission output shaft.
Claim 4
Dependent Claim
15 words
The tool of claim 2, wherein said processing is performed using a fast Fourier transform.
Claim 5
Dependent Claim
15 words
The tool of claim 1, wherein said speed signals are also processed into torsional displacement.
References Cited (Backward Citations)
US4426641A
Cited
US4452074A
Cited
US5012417A
Cited
US5187434A
Cited
US5365787A
Cited
US5412985A
Cited
US5955674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-10-10 | 2004-04-10 | 2004-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-10 | 2008-04-10 | 2008-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-10 | 2012-04-10 | 2012-10-10 | $7700.00 | Window Closed / Lapsed |