Patent ID: 6616574
Filing Date: 2003-09-09
Classification: B60W,F16H,Y10T

Abstract:
A system for shift control of an automatic transmission, the system comprising:vehicle running status detecting means for detecting the running status of a vehicle; shift control means for outputting a control signal to perform a kick down skip 3-1 shift if conditions for the kick down skip 3-1 shift are satisfied with a manipulation during a 4-3 shift before stop by receiving an input of a signal detected by a vehicle running status detecting means, and for outputting an engine torque reduction requesting signal on the basis of an engine torque reduction starting point and engine torque reduction maintaining time determined according to a vehicle deceleration rate of a 4-3 shift before stop at the time of the kick down skip 3-1 shift; transmission driving means for carrying out a change in speed by supplying or stopping the oil pressure discharged and supplied from an oil pump according to a control signal output from the shift control means; engine control means for outputting a predetermined control signal to reduce engine torque according to an engine torque reduction requesting signal output from the shift control means; and engine driving means for reducing engine torque according to the control signal output from an engine control means.