Control device and control method for hybrid vehicle
First Claim
1. A control device for a hybrid vehicle, including a unit having an internal combustion engine, a motor, a stepped power transmission and an electric storage device adapted to supply electric power output to the motor, wherein at least one of power outputs of the internal combustion engine and the motor is transmitted through the stepped power transmission to an output shaft thereof, the control device comprising:
- a state of charge detecting section detecting an SOC value indicative of a remaining charged capacity of an electric storage device;
a target running efficiency calculating section calculating a target value of a running efficiency, indicative of a proportion of a given physical quantity, in terms of a drive power rate required for driving the vehicle, in such a manner that the higher the SOC value, the small will be the target value to be calculated;
a target unit operating point calculating section calculating a target value of a unit operating point, that forms the target running efficiency, from among operating points of a unit which cause the drive power rate provided by an internal combustion engine to be utilized at the running efficiency with the maximum efficiency; and
a target unit operating point actualizing section controlling the unit such that the unit is operated at the target unit operating point.
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Accused Products
Abstract
A control device and control method for a hybrid vehicle is disclosed having an electric storage detecting section 13 which detects a state of charge (SOC) of an electric storage device 10. A target running efficiency calculating section 14 serves as a unit to calculate a target value of a running efficiency, indicative of a proportion of a given physical quantity, in terms of a drive power rate required for driving the vehicle such that the higher the SOC detected value, the smaller will be the target value. A target unit operating point calculating section 15 calculates a target value of a unit operating point, providing the target running efficiency, from among operating points, that cause a power rate of an internal combustion engine 1 to be utilized at the running efficiency with the maximum efficiency, of a unit 11 (the internal combustion engine 1, a clutch 2, a motor 3 and a stepped power transmission 4), and a target unit operating point actualizing section 16 operates the unit 11 at the target unit operating point.
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Citations
9 Claims
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1. A control device for a hybrid vehicle, including a unit having an internal combustion engine, a motor, a stepped power transmission and an electric storage device adapted to supply electric power output to the motor, wherein at least one of power outputs of the internal combustion engine and the motor is transmitted through the stepped power transmission to an output shaft thereof, the control device comprising:
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a state of charge detecting section detecting an SOC value indicative of a remaining charged capacity of an electric storage device;
a target running efficiency calculating section calculating a target value of a running efficiency, indicative of a proportion of a given physical quantity, in terms of a drive power rate required for driving the vehicle, in such a manner that the higher the SOC value, the small will be the target value to be calculated;
a target unit operating point calculating section calculating a target value of a unit operating point, that forms the target running efficiency, from among operating points of a unit which cause the drive power rate provided by an internal combustion engine to be utilized at the running efficiency with the maximum efficiency; and
a target unit operating point actualizing section controlling the unit such that the unit is operated at the target unit operating point. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control device for a hybrid vehicle, including a unit having an internal combustion engine, a motor, a stepped power transmission and an electric storage device adapted to supply electric power output to the motor, wherein at least one of power outputs of the internal combustion engine and the motor is transmitted through the stepped power transmission to an output shaft thereof, the control device comprising:
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means for detecting an SOC value indicative of a remaining charged capacity of an electric storage device;
means for calculating a target value of a running efficiency, indicative of a proportion of a given physical quantity, in terms of a drive power rate required for driving the vehicle, in such a manner that the higher the SOC value, the small will be the target value to be calculated;
means for calculating a target value of a unit operating point, that forms the target running efficiency, from among operating points of a unit which cause the drive power rate provided by an internal combustion engine to be utilized at the running efficiency with the maximum efficiency; and
target unit operating point actualizing means for controlling the unit such that the unit is operated at the target unit operating point.
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9. A control method for a hybrid vehicle, including a unit having an internal combustion engine, a motor, a stepped power transmission and an electric storage device adapted to supply electric power output to the motor, wherein at least one of power outputs of the internal combustion engine and the motor is transmitted through the stepped power transmission to an output shaft thereof, the control method comprising:
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detecting an SOC value indicative of a remaining charged capacity of the electric storage device;
calculating a target value of a running efficiency, indicative of a proportion of a given physical quantity in terms of a drive power rate required for driving the vehicle in such a manner that the higher the SOC value, the small will be the target value to be calculated;
calculating a target value of a unit operating point, that forms the target running efficiency, from among operating points of the unit which cause a power rate provided by the internal combustion engine to be utilized at the running efficiency with the maximum efficiency; and
controlling the unit in a way to actualize operation of the unit at the target unit operating point.
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Specification