Patent ID: 9662998
Date: 2017-05-30
CPC Classifications: B60L,F16H,Y02T,Y10S

Claim:
1. An electric vehicle gear shifting control device for controlling gear shifting in an electric vehicle having a motor-generator for implementing regeneration during deceleration, and an automatic transmission having a meshing clutch as a shifting element, the motor-generator and the meshing clutch being provided in a drivetrain extending from a drive source to a drive wheel in the electric vehicle; the electric vehicle gearshift control device comprising: a gear shifting controller programmed to assess whether to grant a gear shifting permission based on whether a deceleration grade difference occurring as a result of a reengagement gear shifting is less than a predetermined deceleration G fluctuation when a reengagement gear shift request involving disengaging or engaging the meshing clutch is made during deceleration or regeneration; and initiate shifting of gears according to the gear-shift request upon deciding to grant gear shifting permission, when loss in the torque transmitted through the drivetrain occurs due to a neutral state being entered during a reengagement gear shift transitional period using the meshing clutch, the gear shifting controller is further programmed to set as, a threshold value, a predetermined torque loss index value, and to permit shifting gears when a torque loss index value yielded by the magnitude of the current regeneration torque is less than the threshold value.