Patent ID: 6595888
Filing Date: 2003-07-22
Classification: F16H

Abstract:
A transmission control device for an automatic transmission, wherein a transmission operation is performed by alternating the connection between friction engagement elements, in which the connection control and the release control of different friction engagement elements are carried out simultaneously, said transmission control device including:an input shaft rotation speed detecting means for detecting the input shaft rotation speed of a transmission mechanism; and a power on/off determining means for determining whether the transmission operation is a power-on state transmission operation or a power-off state transmission operation, based on a direction to which said input shaft rotation speed changes when release control of a release-side friction engagement element starts, said power on/off determining means determining that the transmission operation is a power-on state transmission operation when said input shaft rotation speed is increased, and determining that the transmission operation is a power-off state transmission operation when said input shaft rotation speed is reduced.