Driveline vibration system diagnostics
First Claim
1. A tool for measuring and analyzing the operation of a rotating component comprising:
- a sensor for generating a signal having a frequency proportional to the substantially instantaneous speed of a driveline component under test;
a electronic control unit electrically coupled to said sensor for receiving said signal, said control unit including means for filtering said signal into a filtered signal and calculating the total torsional energy by taking the root mean square of said filtered signal over a predetermined period of time and comparing said total torsional energy level to a predetermined maximum level and storing vibration information in a memory section of said electronic control unit.
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Accused Products
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.
36 Citations
14 Claims
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1. A tool for measuring and analyzing the operation of a rotating component comprising:
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a sensor for generating a signal having a frequency proportional to the substantially instantaneous speed of a driveline component under test; a electronic control unit electrically coupled to said sensor for receiving said signal, said control unit including means for filtering said signal into a filtered signal and calculating the total torsional energy by taking the root mean square of said filtered signal over a predetermined period of time and comparing said total torsional energy level to a predetermined maximum level and storing vibration information in a memory section of said electronic control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of measuring and analyzing the operating of a rotating component comprising the steps of:
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measuring the rotational speed characteristics of a rotating component and generating a signal having a frequency proportional to the substantially instantaneous speed of said rotating component; filtering said signal into a filtered signal where said filtered signal has a frequency content between a first order of rotation and a higher order of rotation; calculating a total torsional energy value by taking the root mean square of said filtered signal over a preselected period of time; comparing said total torsional energy value to a preselected maximum value and if said total torsional energy value exceeds said preselected maximum then storing vibration information in memory. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification