Control system for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakashi Iwata, Taiga Hagimoto, Hideto Wakabayashi
Life of this patent
Estimating the term…
Abstract
A control system for a vehicle to prevent a reduction in a drive force due to increase in an internal resistance of a battery. A controller calculates a command value of an output power of the battery to be transmitted to a motor in future, and predicts an internal resistance of the battery at the point to discharge the electric power from the battery in the amount of the command value. If it is expected that the battery will not be possible to discharge the electric power in the amount of the command value, the controller reduces a load on the battery by increasing an amount of the electric power supplied to the motor from the generator before the battery can no longer discharge the electric power in the amount of the command value.
Claims9
A control system for a vehicle comprising:
- a motor as a prime mover that is connected to a pair of drive wheels to deliver torque to the drive wheels;
- an electric storage device that is connected to the motor to supply an electric power to the motor, and whose available output power is reduced due to increase in an internal resistance resulting from discharging the electric power continuously;
- and
- a generating system that is connected to the motor to supply an electric power to the motor without passing through the electric storage device,
- the control system comprising:
- a controller that controls an output power of the electric storage device and a generation amount of the generating system,
- wherein the controller is configured to
- calculate a command value of the output power of the electric storage device to be transmitted to the motor in a future time,
- predict the internal resistance of the electric storage device at a point to discharge the electric power from the electric storage device in the amount of the command value,
- calculate a predicted value of the available output power of the electric storage device in a future time based on the predicted internal resistance,
- determine whether it is possible to discharge the electric power from the electric storage device in the amount of the command value in a future time, and
- execute a load reducing control to reduce the output power of the electric storage device by increasing an amount of the electric power supplied to the motor from the generating system greater than the amount of the electric power supplied to the motor from the generating system of the case where it is expected that the electric storage device will be possible to discharge the electric power in the amount of the command value, before a point at which the electric storage device can no longer discharge the electric power in the amount of the command value, if it is expected that the electric storage device will not be possible to discharge the electric power in the amount of the command value.
Dependencies are inferred from the claim text.