Calibration method for transmission clutch and brakes

A vehicle powershift transmission has a lube oil passage which communicates lube oil to a clutch pack. Communication of lube oil is controlled as a function of the engagement state of the clutch pack. The hydraulic control pressure required to initially engage the clutch pack is determined or calibr...

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Bibliographische Detailangaben
1. Verfasser:	TESTERMAN, MICHAEL DUANE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A vehicle powershift transmission has a lube oil passage which communicates lube oil to a clutch pack. Communication of lube oil is controlled as a function of the engagement state of the clutch pack. The hydraulic control pressure required to initially engage the clutch pack is determined or calibrated by a method wherein the lube oil pressure is monitored while the clutch control pressure is gradually increased. When the lube oil pressure reaches a certain level corresponding to clutch pack engagement, the current value of the control pressure is saved as the calibration pressure.