Determining clutch fill volume in an automatic transmission

Details Determining clutch fill volume in an automatic transmission Determining clutch fill volume in an automatic transmission

2006-09-13

2009-08-18

Williams, Hezron (Department: 2856)

Measuring and testing

Volumetric content measuring

C073S168000

Reexamination Certificate

active

07574906

ABSTRACT:
A method of determining a fill volume of a clutch of an automatic transmission. A clutch fill sequence is observed from measurement of fluid pressure applied to the clutch, wherein the sequence may include a initial rise, a plateau, and a final rise. A fill end time may be identified as corresponding to an intersection of a forward extrapolated portion of the plateau and a backward extrapolated portion of the final rise.

REFERENCES:
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patent: 6285942 (2001-09-01), Steinmetz et al.
patent: 6626036 (2003-09-01), Milender et al.
patent: 2003/0121748 (2003-07-01), Harvey et al.

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