ELECTRIC VEHICLE GEAR SHIFTING CONTROL DEVICE

摘要

A drivetrain from a drive source to drive wheel is provided with a motor-generator for implementing regeneration during deceleration and an automatic transmission having an engaging clutch as a shifting element. The electric vehicle has a gear shifting controller that is programmed to assess whether to grant gear shifting permission based on whether a deceleration grade difference occurring as a result of a reengagement gear shifting is less than a prescribed acceptable deceleration fluctuation when a reengagement gear shift request involving disengaging or engaging the meshing clutch is made during deceleration or regeneration. Shifting is initiated according to the gear-shift request if a decision to grant gear shifting permission is made.

主权项

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 prescribed acceptable deceleration fluctuation when a reengagement gear shift request involving disengaging or engaging the meshing clutch is made during deceleration or regeneration; andinitiate shifting of gears according to the gear-shift request upon deciding to grant gear shifting permission.