Patent ID: 6159129
Filing Date: 2000-12-12
Classification: F16H,Y10T

Abstract:
In an automatic transmission having a controller adapted to shift said automatic transmission from a first gear state to a second gear state, said automatic transmission having a plurality of clutch elements, each said clutch element having a respective fill volume, a method for shifting from said first gear state to said second gear state, said method comprising the steps of:providing said automatic transmission;releasing a first clutch element to a point within a control limit and applying a second clutch element, said control limit defined by a control volume between a fill volume of said first clutch element and a predetermined point above said fill volume of said first clutch element;maintaining said first clutch element within said control limit until said second clutch element reaches a second fill volume associated with said second clutch element; andreleasing said first clutch element shortly after said second clutch element reaches said second fill volume.