Patent ID: 7503873
Filing Date: 2009-03-17
Classification: B60W,F02D,F16H,Y02T,Y10T

Abstract:
1. A control apparatus for an automatic transmission provided with a speed change mechanism, wherein the control apparatus includes a hydraulic pressure control means for individually controlling hydraulic pressure acting to a plurality of frictional engaging elements to selectively switch engagement and disengagement of respective frictional engaging elements, thereby switching a gear stage of the speed change mechanism, said control apparatus further comprising: downshift control means for controlling the hydraulic pressure, in response to a driver's command to decelerate, in such a manner that said speed change mechanism causes a downshift to a gear stage capable of producing an engine brake; engine output increasing means for executing an engine output increasing control that increases an engine output during said downshift control irrespective of a driver's accelerator operation; input shaft speed detecting means for detecting an input shaft rotational speed of said speed change mechanism; and output shaft speed detecting means for detecting an output shaft rotational speed of said speed change mechanism, wherein wherein said engine output increasing means includes means for starting said engine output increasing control when a reduction in a ratio of the input shaft rotational speed and the output shaft rotational speed of said speed change mechanism exceeds a predetermined value and means for prohibiting said engine output increasing control when a downshift request is generated during said fuel cut delay control.