Patent ID: 6102830
Filing Date: 2000-08-15
Classification: F16H,Y10T

Abstract:
A shift control device for an automatic transmission, comprising:a plurality of frictional engagement elements that change a power transmission line between an input shaft inputting power from an engine output shaft and an output shaft connected to vehicle wheels;a plurality of hydraulic servos, a hydraulic servo that engages and disengages each frictional engagement element of the plurality of frictional engagement elements;an adjusting device which adjusts a hydraulic pressure applied to a predetermined hydraulic servo;a control unit which outputs control signals to the adjusting device;a process circumstances determining device in the control unit, the process circumstances determining device determines process circumstances of a first shift at a determination of a second shift, when the second shift is determined during the shift control for the first shift; anda select device in the control unit, the select device selects a shift pattern from a first shift pattern, wherein the operation of the first shift is interrupted and the automatic transmission is directly shifted to a ratio achieved by the second shift, and a second shift pattern, wherein the automatic transmission is shifted to a ratio achieved by the second shift after the end of the first shift, based on the detection of the process circumstances determining circuit.