Regenerative braking control apparatus for electrically-powered vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorMakio Tsuchiyama
Life of this patent
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Abstract
A regenerative torque control unit is configured to reduce a regenerative torque and increase a rising gradient of the regenerative torque at a start of regeneration when a road surface friction coefficient acquired by a road surface friction coefficient acquisition unit is low as compared to when the road surface friction coefficient is high. Thus, it is possible to suppress occurrence of a slip on a low μ road, and it is less likely to provide a feeling of strangeness from a change between a low μ road and a high μ road.
Claims6
A regenerative braking control apparatus for an electrically-powered vehicle including a rotating electrical machine for driving the vehicle, the regenerative braking control apparatus comprising:
- a road surface friction coefficient acquisition unit programmed to acquire a road surface friction coefficient;
- and
- a regenerative torque control unit programmed to control a regenerative torque of the rotating electrical machine during deceleration of the electrically-powered vehicle, wherein:
- the regenerative torque control unit is programmed to control the regenerative torque for a rear wheel of the electrically-powered vehicle, wherein the electrically-powered vehicle is a rear-wheel-drive vehicle;
- and
- the regenerative torque control unit is programmed to reduce the regenerative torque and increase a rising gradient of the regenerative torque over time at a start of regeneration when the road surface friction coefficient acquired by the road surface friction coefficient acquisition unit is low as compared to when the road surface friction coefficient is high.
Dependencies are inferred from the claim text.