Method of testing friction components for automatic transmissions
US6923049B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2003 |
| Grant date | Aug 2, 2005 |
| Priority date | — |
| Expiry date | Jan 1, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M13/022
- WIPO fieldMeasurement
- WIPO sectorInstruments
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 Vtarget until a predetermined level of engagement torque Tth is 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.