Patent ID: 7207923
Filing Date: 2007-04-24
Classification: B60W,F16H,Y10T

Abstract:
1. A method for reducing shift shock of an automatic transmission, comprising: detecting a current power-on upshift state; determining whether an engine temperature is greater than a predetermined temperature; only if it is determined that the engine temperature is greater than the predetermined temperature, performing a first engine torque reduction control according to an engine torque or a throttle valve opening position at an instance of a shift begin point, if the current power-on upshift state is a normal power-on upshift state; and only if it is determined that the engine temperature is greater than the predetermined temperature, performing a second engine torque reduction control according to an engine torque or a throttle valve opening position even after the shift begin point, if there is a power change during a power-on upshift or a current upshift is a shift during a shift; wherein the performing the first engine torque reduction control comprises: and wherein the performing of the second engine torque reduction control comprises: