Patent ID: 7247126
Filing Date: 2007-07-24
Classification: B60W,F16H,Y10T

Abstract:
1. A method for shift control of an automatic transmission comprising: determining whether a 4 to 3 shift condition is satisfied during an execution of a 3 to 4 shifting; starting the 4 to 3 shifting before the 3 to 4 shifting is finished, when the 4 to 3 shift condition is satisfied during the execution of the 3 to 4 shifting; and executing the started 4 to 3 shifting according to a predetermined hydraulic control pattern; wherein the executing of the started 4 to 3 shifting comprises: wherein the controlling of the off-going and on-coming pressure duties such that the turbine speed rebounds and increases up to the local maximum value exceeding the target speed comprises: