System and method for automatic transmission shift control

Abstract

A engine control system for an automatic transmission includes an engine torque control module that increases engine torque from a first torque level to a second torque level during a period before a shift from a first gear ratio to a second gear ratio, wherein the first gear ratio is greater than the second gear ratio, wherein the first torque level is based on driver input and vehicle speed, and wherein the second torque level is based on the first torque level and the first and second gear ratios. A transmission control module decreases a torque capacity of a first clutch to a third torque level during the period and increases a torque capacity of a second clutch to a fourth torque level during the period, wherein the fourth torque level is based on the second torque level and a torque gain of the second clutch.

Dependencies are inferred from the claim text.