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AssigneeGM Global Technology Operations LLC
InventorsCharles J. Lemont, Jr., Jose M. Lopez, David C. Pomerville, Scott R. Kloess, Robert S. Brines, Marc J. Tahnoose, Darrin S. Mallard
Estimating the term…
A method of determining steering rack rattle propensity of a rack and pinion steering assembly may comprise: simultaneously recording audio, and measuring acceleration of a rack, and right and left side tie-rod end loads; identifying rack rattle events from the audio recording; determining common characteristics of the measured rack acceleration and tie-rod end loads during the identified rack rattle events; creating a rack rattle index level; applying a predetermined force profile to a test rack and pinion steering assembly; measuring a test acceleration on the test rack and pinion steering assembly; calculating a test RMS level in a test frequency range using a test time constant; determining a rack rattle index value from the calculated test RMS level; and comparing the rack rattle index value to the rack rattle index level.
A method of determining steering rack rattle propensity of a rack and pinion steering assembly to be used on a vehicle, the method comprising the steps of:
A method of determining steering rack rattle propensity of a rack and pinion steering assembly to be used on a vehicle, the method comprising the steps of:
A method of determining steering rack rattle propensity of a rack and pinion steering assembly to be used on a vehicle, the method comprising the steps of:
Dependencies are inferred from the claim text.