Hybrid vehicle and travel control method of hybrid vehicle
First Claim
1. A hybrid vehicle comprising:
- an internal combustion engine and an electric motor each configured to generate a vehicle drive power;
a chargeable power storage device having a loss characteristic changing an internal power loss during charging/discharging according to an SOC and relatively increasing the internal power loss during the charging/discharging when the SOC is low;
an electric power converting unit performing electric power conversion for controlling drive of said electric motor between said power storage device and said electric motor; and
a control device for controlling a whole operation of said hybrid vehicle,said control device including;
an output share determining unit determining output shares of said internal combustion engine and said electric motor with respect to a required whole vehicle drive power, based on a vehicle drive state and a comparison between the SOC of said power storage device and an SOC target,an estimated travel distance obtaining unit obtaining an estimated travel distance to a predetermined point during traveling to said predetermined point, anda target setting unit setting said SOC target during traveling to said predetermined point such that said SOC attains a predetermined level when the vehicle arrives at said predetermined point, andsaid target setting unit variably sets said SOC target according to said estimated travel distance obtained by said travel distance obtaining unit according to the loss characteristic of said power storage device, sets said SOC target to be attained when said estimated travel distance is shorter than said predetermined distance to a level corresponding to said predetermined level, and sets said SOC target to be attained when said estimated travel distance is equal to or longer than said predetermined distance to fall within a region higher than said predetermined level.
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Accused Products
Abstract
An SOC target is a control target of a remaining capacity of an accumulation device having a characteristic that the internal loss increases in a low SOC region. The SOC target is set to a first value corresponding to a remaining capacity target upon reaching a predetermined point when the remaining travel distance up to a predetermined point where the accumulation device can be charged from outside has become shorter than a predetermined distance. Thus, the hybrid vehicle can perform EV travel by power consumption of the accumulation device. On the other hand, when the remaining travel distance is not smaller than the predetermined distance Dr, the SOC target is set to a second value in the SOC region where the loss of the accumulation device is smaller than the first value. Thus, it is possible to reduce the power consumption in the hybrid vehicle which performs such a remaining capacity management that the remaining capacity of the accumulation device upon arrival at a predetermined point is a predetermined value.
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Citations
18 Claims
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1. A hybrid vehicle comprising:
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an internal combustion engine and an electric motor each configured to generate a vehicle drive power; a chargeable power storage device having a loss characteristic changing an internal power loss during charging/discharging according to an SOC and relatively increasing the internal power loss during the charging/discharging when the SOC is low; an electric power converting unit performing electric power conversion for controlling drive of said electric motor between said power storage device and said electric motor; and a control device for controlling a whole operation of said hybrid vehicle, said control device including; an output share determining unit determining output shares of said internal combustion engine and said electric motor with respect to a required whole vehicle drive power, based on a vehicle drive state and a comparison between the SOC of said power storage device and an SOC target, an estimated travel distance obtaining unit obtaining an estimated travel distance to a predetermined point during traveling to said predetermined point, and a target setting unit setting said SOC target during traveling to said predetermined point such that said SOC attains a predetermined level when the vehicle arrives at said predetermined point, and said target setting unit variably sets said SOC target according to said estimated travel distance obtained by said travel distance obtaining unit according to the loss characteristic of said power storage device, sets said SOC target to be attained when said estimated travel distance is shorter than said predetermined distance to a level corresponding to said predetermined level, and sets said SOC target to be attained when said estimated travel distance is equal to or longer than said predetermined distance to fall within a region higher than said predetermined level. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11)
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4. (canceled)
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12. A travel control method of a hybrid vehicle, wherein
said hybrid vehicle including: -
an internal combustion engine and an electric motor each configured to generate a vehicle drive power, a chargeable power storage device having a loss characteristic changing an internal power loss during charging/discharging according to an SOC and relatively increasing the internal power loss during the charging/discharging when the SOC is low, and an electric power converting unit performing electric power conversion for controlling drive of said electric motor between said power storage device and said electric motor; and said travel control method comprising the steps of; determining output shares of said internal combustion engine and said electric motor with respect to a required whole vehicle drive power, based on a vehicle drive state and a comparison between the SOC of said power storage device and an SOC target; obtaining an estimated travel distance to a predetermined point during traveling to said predetermined point; and setting said SOC target during traveling to said predetermined point such that said SOC attains a predetermined level when the vehicle arrives at said predetermined point; and said step of setting variably sets said SOC target according to said estimated travel distance obtained by said step of obtaining according to the loss characteristic of said power storage device, sets said SOC target to be attained when said estimated travel distance is shorter than said predetermined distance to a level corresponding to said predetermined level, and sets said SOC target to be attained when said estimated travel distance is equal to or longer than said predetermined distance to fall within a region higher than said predetermined level. - View Dependent Claims (13, 14, 16, 17, 18)
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15. (canceled)
Specification