Control unit and method for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsSeiji Kuwahara, Masato Kaigawa
Life of this patent
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Abstract
An ECT_ECU performs a program including: a step of determining whether the gears are being changed or the gears are not being changed; a step of setting the virtual gear to the current gear, if the gears are not being changed; a step of setting the virtual gear to the gear before the gears are changed, if the gears are being changed but the inertia phase has not been started; a step of setting the virtual gear to the gear after the gears are changed, if the gears are being changed and the inertia phase has been started; a step of calculating the gear-change progress α; a step of calculating the virtual gear ratio based on the virtual gear and the gear-change progress α; and a step of calculating the target engine torque using the virtual gear ratio.
Claims10
A control unit for a vehicle equipped with a stepped automatic transmission, comprising:
- a gear-change progress calculation device that calculates progress of gear-change performed by the automatic transmission;
- a virtual gear ratio calculation device that calculates a virtual gear ratio based on the progress of the gear-change, a gear ratio before the gear-change and a gear ratio after the gear-change;
- and
- a target torque calculation device that calculates a target torque to be output from a drive power source of the vehicle based on the virtual gear ratio.
A control unit for a vehicle equipped with a stepped automatic transmission, comprising:
- gear-change progress calculation means for calculating progress of gear-change performed by the automatic transmission;
- virtual gear ratio calculation means for calculating a virtual gear ratio based on the progress of the gear-change, a gear ratio before the gear-change and a gear ratio after the gear-change;
- and
- target torque calculation means for calculating a target torque to be output from a drive power source of the vehicle based on the virtual gear ratio.
A control method for a vehicle equipped with a stepped automatic transmission, comprising:
- calculating progress of gear-change performed by the automatic transmission;
- calculating a virtual gear ratio based on the progress of the gear-change, a gear ratio before the gear-change and a gear ratio after the gear-change;
- and
- calculating a target torque to be output from a drive power source of the vehicle based on the virtual gear ratio.
Dependencies are inferred from the claim text.