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US 2009/0288896 A1Published application
Hybrid vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorShinji Ichikawa
Life of this patent
Estimating the term…
Abstract
An HV-ECU continuously integrates period of no external charge as the time elapsed from latest external charging (last external charging). When ignition is turned on, a stored map is looked-up, and an SOC control center value that corresponds to the period of no external charge is obtained. Charge/discharge management of the power storage unit in HV running mode is executed based on the obtained SOC control center value. When the period of no external charge exceeds a prescribed threshold value, SOC control center value is increased to control center value.
Claims10
A hybrid vehicle, comprising:
- an engine operating on fuel combustion;
- power generating means capable of generating electric power, receiving power generated by the operation of said engine;
- a power storage unit charged by the electric power from said power generating means;
- driving force generating means for generating driving force from the electric power from at least one of said power generating means and said power storage unit;
- external charging means electrically connected to an external power supply, for charging said power storage unit by said external power supply;
- and
- a control unit for controlling vehicle driving force to be generated in accordance with a driver's request, and for controlling electric power charged/discharged at said power storage unit;
- wherein
- said control unit controls in a first running mode until a value of state of charge of said power storage unit attains lower than a prescribed value, and makes a transition to a second running mode when said value of state of charge becomes lower than the prescribed value;
- in said first running mode, charging of said power storage unit by said power generating means is limited, and in said second running mode, charging of said power storage unit by said power generating means is allowed such that said value of state of charge is maintained in a prescribed range with a control center value being the center;
- and
- said control unit includes control center value changing means for changing said control center value in accordance with an external charge execution degree as a degree of executing charging of said power storage unit by said external charging means.
9 more elements
A hybrid vehicle, comprising:
- an engine operating on fuel combustion;
- a power generating mechanism capable of generating electric power, receiving power generated by the operation of said engine;
- a power storage unit charged by the electric power from said power generating mechanism;
- a driving force generating mechanism for generating driving force from the electric power from at least one of said power generating mechanism and said power storage unit;
- an external charging mechanism electrically connected to an external power supply, for charging said power storage unit by said external power supply;
- and
- a control unit for controlling vehicle driving force to be generated in accordance with a driver's request, and for controlling electric power charged/discharged at said power storage unit;
- wherein
- said control unit controls in a first running mode until a value of state of charge of said power storage unit attains lower than a prescribed value, and makes a transition to a second running mode when said value of state of charge becomes lower than the prescribed value;
- in said first running mode, charging of said power storage unit by said power generating mechanism is limited, and in said second running mode, charging of said power storage unit by said power generating mechanism is allowed such that said value of state of charge is maintained in a prescribed range with a control center value being the center;
- and
- said control unit changes said control center value in accordance with an external charge execution degree as a degree of executing charging of said power storage unit by said external charging mechanism.
9 more elements
Dependencies are inferred from the claim text.