Calibration method for transmission control clutches

F - Mech Eng,Light,Heat,Weapons – 16 – H

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F16H 61/14 (2006.01) F16D 25/12 (2006.01) F16H 61/06 (2006.01) F16H 59/68 (2006.01) F16H 61/00 (2006.01)

Patent

CA 2129888

A vehicle powershift transmission has a lube oil passage which communication 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.

Servotransmission de véhicule comprenant un tuyau d'huile de graissage qui communique l'huile à un embrayage à disques multiples. La communication de l'huile est contrôlée comme une fonction de l'état d'engagement de l'embrayage. La pression de commande hydraulique nécessaire à engager l'embrayage est déterminée ou étalonnée par une méthode où la pression de l'huile est contrôlée pendant que la pression de la commande d'embrayage est graduellement augmentée. Lorsque la pression de l'huile de graissage atteint un certain niveau correspondant à l'engagement de l'embrayage à disques multiples, la valeur actuelle de la pression de commande est enregistrée comme étant la pression d'étalonnage.

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