Motive power system, transportation apparatus, and power transmission method
AssigneeHonda Motor Co., Ltd.
InventorsDaijiro Takizawa, Hirokazu Oguma
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Abstract
A motive power system includes a first energy storage, a second energy storage, an actuator, an internal combustion engine, a power transmission circuit, and circuitry. At least the actuator drives a load in a charge-depleting mode using a first energy supplied from the first energy storage and/or the second energy storage according to a second charge rate. At least the internal combustion engine drives the load in a charge-sustaining mode using a second energy that is lower than the first energy and that is supplied to the actuator from the first energy storage and/or the second energy storage according to a first charge rate.
Claims22
A motive power system comprising:
- a first energy storage device;
- a second energy storage device having a higher power density and a lower energy density than the first energy storage device;
- an actuator that outputs motive power for driving a target load in response to power supplied from at least one of the first energy storage device and the second energy storage device;
- an internal combustion engine that outputs motive power for driving the target load;
- a power transmission circuit unit having a function of performing power transmission among the first energy storage device, the second energy storage device, and the actuator;
- and
- a control device having a function of controlling the power transmission circuit unit by using a charge-depleting mode and a charge-sustaining mode,
- the charge-depleting mode being a mode in which at least the motive power of the actuator is usable as motive power for driving the target load so that a total stored energy of the first energy storage device and the second energy storage device is consumed,
- the charge-sustaining mode being a mode in which at least the motive power of the internal combustion engine is usable as motive power for driving the target load so that the total stored energy of the first energy storage device and the second energy storage device is less consumed than in the charge-depleting mode, wherein
- the control device is configured to
- control the power transmission circuit unit in the charge-depleting mode in a manner corresponding to a second charge rate that is a charge rate of the second energy storage device, and
- control the power transmission circuit unit in the charge-sustaining mode in a manner corresponding to a first charge rate that is a charge rate of the first energy storage device.
A power transmission method for a motive power system, the motive power system including a first energy storage device, a second energy storage device having a higher power density and a lower energy density than the first energy storage device, an actuator that outputs motive power for driving a target load in response to power supplied from at least one of the first energy storage device and the second energy storage device, and an internal combustion engine that outputs motive power for driving the target load, the power transmission method comprising:
- performing power transmission among the first energy storage device, the second energy storage device, and the actuator by using a charge-depleting mode and a charge-sustaining mode,
- the charge-depleting mode being a mode in which at least the motive power of the actuator is usable as motive power for driving the target load so that a total stored energy of the first energy storage device and the second energy storage device is consumed,
- the charge-sustaining mode being a mode in which at least the motive power of the internal combustion engine is usable as motive power for driving the target load so that the total stored energy of the first energy storage device and the second energy storage device is less consumed than in the charge-depleting mode, wherein
- in the charge-depleting mode, the power transmission is performed in a manner corresponding to a second charge rate that is a charge rate of the second energy storage device, and
- in the charge-sustaining mode, the power transmission is performed in a manner corresponding to a first charge rate that is a charge rate of the first energy storage device.
A motive power system comprising:
- a first energy storage having a first power density and a first energy density;
- a second energy storage having a second power density higher than the first power density and a second energy density lower than the first energy density;
- an actuator to drive a load using electric power supplied from at least one of the first energy storage and the second energy storage;
- an internal combustion engine to drive the load;
- a power transmission circuit via which the actuator is connected to the first energy storage and to the second energy storage;
- and
- circuitry configured to
- control the internal combustion engine and the power transmission circuit to drive the load selectively in a charge-depleting mode or in a charge-sustaining mode, at least the actuator driving the load in the charge-depleting mode using a first energy supplied from the first energy storage and/or the second energy storage according to a second charge rate of the second energy storage, at least the internal combustion engine driving the load in the charge-sustaining mode using a second energy that is lower than the first energy and that is supplied to the actuator from the first energy storage and/or the second energy storage according to a first charge rate of the first energy storage.
A power transmission method for a motive power system including a first energy storage, a second energy storage, an actuator, an internal combustion engine, and a power transmission circuit, the power transmission method comprising:
- controlling the internal combustion engine and the power transmission circuit to drive a load selectively in a charge-depleting mode or in a charge-sustaining mode, at least the actuator driving the load in the charge-depleting mode using a first energy supplied from the first energy storage and/or the second energy storage according to a second charge rate of the second energy storage, at least the internal combustion engine driving the load in the charge-sustaining mode using a second energy that is lower than the first energy and that is supplied to the actuator from the first energy storage and/or the second energy storage according to a first charge rate of the first energy storage.
Dependencies are inferred from the claim text.