Patent ID: 6684144
Filing Date: 2004-01-27
Classification: F16H,Y10T

Abstract:
A control apparatus for speed shift control of an automatic transmission in which a speed shift is performed based on satisfaction of a predetermined speed shift condition, the control apparatus comprising:speed shift determining means for outputting a speed shift determination responsive to satisfaction of the predetermined speed shift condition; speed shift executing means for executing an actual speed shift based on the output speed shift determination; shift initiation-time engine rotational speed detecting means for determining a time at which the actual execution of the speed shift is initiated, and for detecting an engine rotational speed at the time of the initiation of the speed shift, wherein said shift initiation-time engine rotational speed detecting means compares an input rotational speed of the automatic transmission with a value obtained by multiplying an output rotational speed of the automatic transmission by a gear ratio of a pre-shift speed stage, determines initiation of the speed shift when said input rotational speed becomes less than said value, and detects the engine rotational speed at the time of initiation of the speed shift; and learning-correcting means for correcting the predetermined speed shift condition by comparing the engine rotational speed at the time of initiation of the speed shift with a target engine rotational speed.