Driving System for Hybrid Vehicle
First Claim
1. A hybrid-vehicle control system for controlling a vehicle driveline having an engine, a transmission, a first motor/generator provided between the engine and the transmission, and a battery, the hybrid-vehicle control system comprising:
- a first inverter, coupled to the first motor/generator;
a voltage adjusting circuit coupled to the first inverter and to the battery, the voltage adjusting circuit being configurable to electrically connect the battery and the first inverter, to electrically disconnect the battery and the first inverter, and to adjust a voltage from the first inverter to the battery; and
a controller, coupled to at least the first inverter, the voltage adjusting circuit, the battery, the transmission, the controller being configured to issue signals to shift the transmission to a target shift position during a gear shift operation according to a driving force requested by a driver, to control generation of electrical power by the first motor/generator during the gear shift operation so that the engine is controlled to a rotation speed corresponding to the target shift position of the transmission, and to calculate a requested output voltage of the first motor/generator from power generated by the first motor/generator during the gear shift operation,wherein, when the requested output voltage becomes greater than or equal to a predetermined voltage during the gear shift operation, the controller controls the voltage adjusting circuit to electrically disconnect the battery from the first inverter to raise an output voltage of the first inverter to the predetermined voltage, and to adjust the output voltage to the first inverter to a second voltage for charging the battery.
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Accused Products
Abstract
A hybrid-vehicle driving system includes an engine, a transmission, a first motor/generator provided between the engine and the transmission, and a battery that can charge and discharge the first motor/generator. When an estimated output voltage of the first motor/generator becomes higher than or equal to a predetermined voltage during a gear shift operation of the transmission, the battery is electrically disconnected from the driving system, and the voltage of a power line on the side of the first motor/generator is then decreased so as to charge the battery.
33 Citations
19 Claims
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1. A hybrid-vehicle control system for controlling a vehicle driveline having an engine, a transmission, a first motor/generator provided between the engine and the transmission, and a battery, the hybrid-vehicle control system comprising:
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a first inverter, coupled to the first motor/generator; a voltage adjusting circuit coupled to the first inverter and to the battery, the voltage adjusting circuit being configurable to electrically connect the battery and the first inverter, to electrically disconnect the battery and the first inverter, and to adjust a voltage from the first inverter to the battery; and a controller, coupled to at least the first inverter, the voltage adjusting circuit, the battery, the transmission, the controller being configured to issue signals to shift the transmission to a target shift position during a gear shift operation according to a driving force requested by a driver, to control generation of electrical power by the first motor/generator during the gear shift operation so that the engine is controlled to a rotation speed corresponding to the target shift position of the transmission, and to calculate a requested output voltage of the first motor/generator from power generated by the first motor/generator during the gear shift operation, wherein, when the requested output voltage becomes greater than or equal to a predetermined voltage during the gear shift operation, the controller controls the voltage adjusting circuit to electrically disconnect the battery from the first inverter to raise an output voltage of the first inverter to the predetermined voltage, and to adjust the output voltage to the first inverter to a second voltage for charging the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for controlling a hybrid vehicle driveline comprising the steps of:
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shifting a transmission to a target shift position during a gear shift operation according to a driving force requested by a driver; controlling power generation of a first motor/generator during the gear shift operation to cause an engine to go to a predetermined rotation speed corresponding to the target shift position of the transmission; calculating a requested output voltage of the motor/generator from power generated by the motor/generator during the gear shift operation; electrically disconnecting a battery from the motor/generator by controlling a switching element when the requested output voltage becomes higher than or equal to a predetermined voltage during the gear shift operation; and charging the battery by controlling a voltage adjusting circuit to cause a voltage to be applied to the battery that is lower than the output voltage of the motor/generator. - View Dependent Claims (15, 16)
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17. A control system for controlling a hybrid vehicle driveline, comprising:
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means for shifting a transmission to a target shift position during a gear shift operation according to a driving force requested by a driver; means for controlling power generation of a first motor/generator during the gear shift operation to cause an engine to go to a predetermined rotation speed corresponding to the target shift position of the transmission; means for calculating a requested output voltage of the motor/generator from power generated by the motor/generator during the gear shift operation; means for electrically disconnecting a battery from the motor/generator by controlling a switching element when the requested output voltage becomes higher than or equal to a predetermined voltage during the gear shift operation; and means for charging the battery by controlling a voltage adjusting circuit to cause a voltage to be applied to the battery that is lower than the output voltage of the motor/generator. - View Dependent Claims (18, 19)
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Specification