Machine element or mechanism – Gearing – Interchangeably locked
Patent
1997-08-29
1999-10-05
Wright, Dirk
Machine element or mechanism
Gearing
Interchangeably locked
477 98, 374145, F16H 5968
Patent
active
059606690
ABSTRACT:
A system for estimating a temperature of a vehicle hydraulically-operated transmission including a hydraulic torque converter, a plurality of frictional engaging elements such as clutches installed in the transmission and a hydraulic pressure supplying circuit for discharging hydraulic fluid from one of said plurality of frictional engaging elements and for supplying hydraulic fluid to another to bring said one and another one of said plurality of frictional engaging elements into operation such that gear-shift is effected in the transmission. A heat quantity generated by the hydraulic coupling means (.DELTA.Ttr), a heat quantity generated by at least one of the frictional engaging elements at gearshift (.DELTA.Tcl(No)), a heat quantity generated by stirring of the hydraulic fluid (.notident.Tst), a heat quantity generated or absorbed at a heat exchanger which exchanges heat from the fluid (.DELTA.Tra), and some similar values are calculated and summed to estimate a temperature of the clutches, thereby enabling a fine hydraulic pressure control.
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Ohashi Tatsuyuki
Suzuki Toshiyuki
Tashiro Yoshirou
Tokita Kaname
Honda Giken Kogyo Kabushiki Kaisha
Kwon Peter T.
Wright Dirk
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