Patent ID: 7653469
Filing Date: 2010-01-26
Classification: F16H,Y10T

Abstract:
1. Method for controlling gear shifting in a fixed input-output multi-ratio automatic transmission coupled to an engine in a motor vehicle, comprising: providing a first gearshift map for controlling gear shifting in the fixed input-output multi-ratio automatic transmission, wherein the first gearshift map comprises a plurality of first gearshift points; providing a second gearshift map for controlling gear shifting in the fixed input-output multi-ratio automatic transmission, wherein the second gearshift map comprises a plurality of second gearshift points; monitoring acceleration of the motor vehicle; determining an acceleration deviation from a nominal vehicle acceleration; determining a gearshift point modifier value corresponding to the acceleration deviation; generating a third gearshift map for controlling gear shifting in the fixed input-output multi-ratio automatic transmission based upon the gearshift point modifier value, the first gearshift map, and the second gearshift map, wherein the third gearshift map comprises a plurality of third gearshift points calculated from corresponding first and second gear shift points and the gearshift point modifier value; and wherein each calculated third gearshift point has a value between and including the corresponding first and second gearshift points.