Vehicle automatic gearbox controller has pressure setting command generator that disengages friction device based on results of two disengagement determination devices

摘要

The arrangement has a pressure setting command generator(135) that performs a gear change process in an automatic gearbox (130) connected to an internal combustion engine (101) by engaging and disengaging a frictional device (122,123) and sets the hydraulic pressure acting on the device at the time of the change. A disengagement time detector (133) detects the disengagement time of a frictional device at the time of changing gear. A first disengagement determination device (134) defines a disengagement operation based on the detection result. A second disengagement determination device (136) defines a disengagement operation if the disengagement time cannot be detected. The pressure setting command generator disengages the device based on the results of both disengagement determination devices. Independent claims are also included for a control method and for a vehicle with an arrangement for controlling an automatic gearbox.