Patent ID: 6510371
Filing Date: 2003-01-21
Classification: F16H

Abstract:
A shift control method comprising the steps of:(a) determining if an input shift signal is a power-on upshift signal; (b) determining if driving conditions satisfy power-on upshift learn conditions when the input shift signal is a power-on upshift signal; (c) performing power-on upshift control if power-on upshift learn conditions are satisfied; (d) learning an initial fill time and completing shifting; (e) determining if shifting is completed; (f) determining if run-up occurred during the shift operation when shifting is completed on the basis of change-rate in turbine rpm; (g) determining if interlocking occurred when run-up did not occur; (h) determining if the interlocking is above a predetermined level on the basis of change-rate in turbine rpm when interlocking occurred; and (i) learning a fill time if the interlocking is above the predetermined level; said power-on upshift learn conditions being satisfied, when driving conditions of a temperature of automatic transmission fluid are above a predetermined temperature, a variation in a throttle valve opening is within a predetermined range, a malfunction code is not present and the throttle valve opening at the time of shifting relative to an output shaft rpm is within a predetermined power-on range.