Patent ID: 7578760
Filing Date: 2009-08-25
Classification: F16H,Y10T

Abstract:
1. An automatic transmission controller of a vehicle, the controller comprising: an automatic transmission that establishes a first speed step by engaging a first engaging element and a second engaging element, and that establishes a second speed step by engaging a third engaging element and a fourth engaging element; a transmission controller that controls a double engaging/disengaging gear shift in shifting from the first speed step to the second speed step; an insufficient gear shifting time determining device that determines whether a gear shifting time to shift from the first speed step to the second speed step is insufficient; and a double engage/disengage prohibiting device that prohibits the gear shift from the first speed step to the second speed step when the insufficient gear shifting time determining device determines that the gear shifting time to shift from the first speed step to the second speed step is insufficient.