Power generation control system for hybrid vehicle
First Claim
1. A power generation control device for a hybrid vehicle havinga first electric motor that is mechanically coupled to a drive wheel and that is mainly used as a drive source for travel driving,a second electric motor that is mechanically coupled to an internal combustion engine, and that has a smaller electrical power generation capability than the first electric motor, anda battery that is electrically coupled to the first electric motor and the second electric motor, andwhen starting the vehicle, an EV start is carried out using the first electric motor as a drive source to which electrical power generated in the second electric motor and battery power are supplied, in a starting region in which the vehicle speed is equal to or less than a predetermined vehicle speed, and the power generation control device comprising:
- a power generation controller configured to cause at least one of the first electric motor and the second electric motor to generate power using torque of the internal combustion engine, andwhile the vehicle is stopped at a time of insufficient battery capacity in which a charge capacity of the battery is less than a first capacity threshold value corresponding to an electrical power that is required for the EV start, the power generation controller is configured to disconnect the first electric motor from the drive wheel, connect the first electric motor to the internal combustion engine, and carry out MG1 idle power generation in which power is generated by the first electric motor by receiving torque from the internal combustion engine, andwhile the vehicle is stopped at a time of sufficient battery capacity in which the charge capacity of the battery is equal to or greater than the first capacity threshold value, the power generation controller is configured not to carry out the MG1 idle power generation and to keep the first electric motor mechanically coupled to the drive wheel.
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Accused Products
Abstract
A hybrid vehicle has a first motor/generator mechanically coupled to a drive wheel, a second motor/generator mechanically coupled to an internal combustion engine and a high-power battery that is electrically coupled to the motor/generators. The second motor/generator has a smaller electrical power generation capability than the first motor/generator. While starting the vehicle at a time of insufficient battery capacity required for the EV start, the power generation controller disconnects the first electric motor from the drive wheel, connects the first electric motor to the internal combustion engine, and carries out MG1 idle power generation in which the first electric motor generates power by receiving torque from the internal combustion engine. When the vehicle is stopped at a time of sufficient battery capacity, the power generation controller does not carry out the MG1 idle power generation and keeps the first electric motor mechanically coupled to the drive wheel.
15 Citations
19 Claims
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1. A power generation control device for a hybrid vehicle having
a first electric motor that is mechanically coupled to a drive wheel and that is mainly used as a drive source for travel driving, a second electric motor that is mechanically coupled to an internal combustion engine, and that has a smaller electrical power generation capability than the first electric motor, and a battery that is electrically coupled to the first electric motor and the second electric motor, and when starting the vehicle, an EV start is carried out using the first electric motor as a drive source to which electrical power generated in the second electric motor and battery power are supplied, in a starting region in which the vehicle speed is equal to or less than a predetermined vehicle speed, and the power generation control device comprising: -
a power generation controller configured to cause at least one of the first electric motor and the second electric motor to generate power using torque of the internal combustion engine, and while the vehicle is stopped at a time of insufficient battery capacity in which a charge capacity of the battery is less than a first capacity threshold value corresponding to an electrical power that is required for the EV start, the power generation controller is configured to disconnect the first electric motor from the drive wheel, connect the first electric motor to the internal combustion engine, and carry out MG1 idle power generation in which power is generated by the first electric motor by receiving torque from the internal combustion engine, and while the vehicle is stopped at a time of sufficient battery capacity in which the charge capacity of the battery is equal to or greater than the first capacity threshold value, the power generation controller is configured not to carry out the MG1 idle power generation and to keep the first electric motor mechanically coupled to the drive wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification