Vehicle and vehicle control method
AssigneesAisin Aw Co., Ltd., Toyota Jidosha Kabushiki Kaisha
InventorsNobuyuki Tanaka, Shoji Nagata
Life of this patent
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Abstract
In a hybrid vehicle including an engine, a motor, a generator, and a battery that is electrically connected to the motor and the generator, an ECU performs “battery-less travel control” enabling the vehicle to travel when a fault occurs in the battery by disconnecting the battery from an electrical system including the motor and the generator and driving the motor using power that is generated by the generator using the power of the engine. When the battery-less travel control is underway and a vehicle speed V exceeds a vehicle speed limit Vsh, the ECU implements a vehicle speed limitation. As a result, a control mode of the motor is less likely to shift to a rectangular control mode during the battery-less travel control.
Claims7
A vehicle that is caused to travel by rotating an output shaft coupled to a drive wheel using drive power generated by at least one of an engine and a motor, comprising:
- a generator that generates electric power using the power of the engine;
- a battery configured to be connectable to the motor and the generator;
- and
- a control apparatus that controls the motor and the generator,
- wherein the control apparatus drives the motor through pulse width modulation control when a vehicle speed is lower than a threshold and
- wherein the control apparatus drives the motor through rectangular control in which the motor can output a larger torque but poor controllability in comparison with the pulse width modulation control, when the vehicle speed exceeds the threshold,
- the control apparatus performs battery-less travel control in which the battery is disconnected from the motor and the generator and the motor is driven using the electric power generated by the generator when an abnormality occurs in the battery, and
- during the battery-less travel control, the control apparatus suppresses execution of the rectangular control by implementing a vehicle speed limitation.
A control method for a vehicle that is caused to travel by rotating an output shaft coupled to a drive wheel using drive power generated by at least one of an engine and a motor, the vehicle including:
- a generator that generates electric power using the power of the engine;
- and
- a battery configured to be connectable to the motor and the generator;
- the control method comprising the steps of:
- driving the motor through pulse width modulation control when a vehicle speed is lower than a threshold, and driving the motor through rectangular control in which the motor can output a larger torque but poor controllability in comparison with the pulse width modulation control, when the vehicle speed exceeds the threshold;
- performing battery-less travel control in which the battery is disconnected from the motor and the generator and the motor is driven using the electric power generated by the generator when an abnormality occurs in the battery;
- and
- suppressing execution of the rectangular control during the battery-less travel control by implementing a vehicle speed limitation.
Dependencies are inferred from the claim text.