HYBRID VEHICLE AND CONTROL METHOD THEREOF
First Claim
1. A hybrid vehicle that includes an internal combustion engine and a motor that are respectively capable of outputting power for driving the vehicle, the hybrid vehicle comprising:
- an accumulator that is capable of supplying and receiving electric power from the motor, the accumulator configured to be capable of being charged with electric power from a charge source outside of the vehicle;
a driving force demand setting module configured to set a driving force demand required for driving the vehicle;
an engine operation point setting module that sets a target operation point of the internal combustion engine to a predetermined operation point that enables the internal combustion engine to be operated efficiently when the internal combustion engine is to be operated while a residual capacity of the accumulator is equal to or more than a predetermined reference residual capacity after a start of a driving of the vehicle, the engine operation point setting module setting the target operation point of the internal combustion engine based on the set driving force demand when the internal combustion engine is to be operated after the residual capacity of the accumulator once becomes less than the reference residual capacity after the start of the driving of the vehicle; and
a control module configured to control the internal combustion engine and the motor so that the internal combustion engine is operated at the set target operation point and a driving power equivalent to the set driving force demand is ensured.
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Accused Products
Abstract
In a hybrid vehicle, a target rotational speed and a target torque or a target operation point of an engine are set to a predetermined optimal efficiency rotational speed and a predetermined optimal efficiency torque that enable the engine to be operated efficiently when the engine is operated while a state of charge of the battery is equal to or more than a control-center state of charge after a start of a driving of the vehicle. Then, the engine and motors are controlled so that the engine is operated at the target operation point and a torque equivalent to a torque demand is output to a ring gear shaft or an axle.
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Citations
10 Claims
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1. A hybrid vehicle that includes an internal combustion engine and a motor that are respectively capable of outputting power for driving the vehicle, the hybrid vehicle comprising:
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an accumulator that is capable of supplying and receiving electric power from the motor, the accumulator configured to be capable of being charged with electric power from a charge source outside of the vehicle; a driving force demand setting module configured to set a driving force demand required for driving the vehicle; an engine operation point setting module that sets a target operation point of the internal combustion engine to a predetermined operation point that enables the internal combustion engine to be operated efficiently when the internal combustion engine is to be operated while a residual capacity of the accumulator is equal to or more than a predetermined reference residual capacity after a start of a driving of the vehicle, the engine operation point setting module setting the target operation point of the internal combustion engine based on the set driving force demand when the internal combustion engine is to be operated after the residual capacity of the accumulator once becomes less than the reference residual capacity after the start of the driving of the vehicle; and a control module configured to control the internal combustion engine and the motor so that the internal combustion engine is operated at the set target operation point and a driving power equivalent to the set driving force demand is ensured. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control method of a hybrid vehicle that includes an internal combustion engine that is capable of outputting power for driving the vehicle, a motor that is capable of outputting power for driving the vehicle, and an accumulator that is capable of supplying and receiving electric power from the motor and configured to be capable of being charged with electric power from a charge source outside of the vehicle, the method comprising the steps of:
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(a) setting a target operation point of the internal combustion engine to a predetermined operation point that enables the internal combustion engine to be operated efficiently when the internal combustion engine is to be operated while a residual capacity of the accumulator is equal to or more than a predetermined reference residual capacity after a start of a driving of the vehicle, and setting the target operation point of the internal combustion engine based on a driving force demand required for driving the vehicle when the internal combustion engine is to be operated after the residual capacity of the accumulator once becomes less than the reference residual capacity after the start of the driving of the vehicle; and (b) controlling the internal combustion engine and the motor so that the internal combustion engine is operated at the target operation point set at Step (a) and a driving power equivalent to the driving force demand is ensured. - View Dependent Claims (8, 9, 10)
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Specification