Method of testing friction components for automatic...

Measuring and testing – Simulating operating condition – Marine

Reexamination Certificate

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Reexamination Certificate

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06923049

ABSTRACT:
A method of testing a friction component for a transmission that has first and second parts. The first part of the friction component is attached to a drive shaft and the second part is attached to a grounding element. The first part of the friction component is rotated until the drive shaft and the first part of the friction component rotate at a target sliding speed Vtarget. An actuation force is applied to the friction component at a time t0. Operation of the motor drive is continued to maintain the speed of rotation of the drive shaft at Vtargetuntil a predetermined level of engagement torque Tthis obtained. The motor torque is then reduced to a predetermined level Tm. The sliding speed of the drive shaft is then decreased and the test is terminated when the sliding speed falls to zero.

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“Review of West Friction Component Models for Automatic Transmission Shift Analysis”, Yuji Fujii, et al., No. 2003-01-1665, SAE International, Noise & Vibration Conference and Exhibition, Traverse City, MI, May 5-8, 2003.

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