Drive System, Power Output System Incorporating The Drive System, A Vehicle Equipped With The Power Output System, And Control Method For A Drive System
First Claim
1. A drive system that drives a drive shaft, comprising:
- a motor that outputs power;
a shifting/transmitting device that transmits power from a rotating shaft of the motor to the drive shaft, and changes a transmission ratio between the rotating shaft of the motor and the drive shaft by driving an actuator;
a shift learning device that performs a learning operation to learn at least one of an operational state of the actuator and an operational state of the motor, when the transmission ratio of the shifting/transmitting device is changed such that an amount of change in driving force on the drive shaft side, that is output to the drive shaft from the motor via the shifting/transmitting device, is within a predetermined range; and
a shift control device that controls the actuator of the shifting/transmitting device using results of the learning operation such that the transmission ratio of the shifting/transmitting device changes.
1 Assignment
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Accused Products
Abstract
In a drive system, where power from a motor is transmitted to a drive shaft and a transmission ratio is changed by a transmission, if the absolute value of the difference between the reference torque Tm2r0, which is the drive shaft side torque Tm2r at the onset of a change in the shift speed of the transmission, and the driving shaft side torque Tm2r during the change is less than the threshold value α until the end of the change (S280), the application state of a brake in the transmission during the change and the state of the hydraulic pressure supplied to the brake are learned (S290). During the change, and actuator of the transmission is controlled using those learned results. Accordingly, any deviations that may have occurred due to changes over time in the transmission, etc. are corrected and the shift speed of the transmission is changed more appropriately.
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Citations
11 Claims
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1. A drive system that drives a drive shaft, comprising:
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a motor that outputs power;
a shifting/transmitting device that transmits power from a rotating shaft of the motor to the drive shaft, and changes a transmission ratio between the rotating shaft of the motor and the drive shaft by driving an actuator;
a shift learning device that performs a learning operation to learn at least one of an operational state of the actuator and an operational state of the motor, when the transmission ratio of the shifting/transmitting device is changed such that an amount of change in driving force on the drive shaft side, that is output to the drive shaft from the motor via the shifting/transmitting device, is within a predetermined range; and
a shift control device that controls the actuator of the shifting/transmitting device using results of the learning operation such that the transmission ratio of the shifting/transmitting device changes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling a drive system including a motor that outputs power and a shifting/transmitting device that transmits power from a rotating shaft of the motor to the drive shaft, and changes a transmission ratio between the rotating shaft of the motor and the drive shaft by driving an actuator, comprising:
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(a) performing a learning operation to learn at least one of an operational state of the actuator and an operational state of the motor, when the transmission ratio of the shifting/transmitting device is changed such that an amount of change in driving force on the drive shaft side, that is output to the drive shaft from the motor via the shifting/transmitting device, is within a predetermined range; and
(b) controlling the actuator of the shifting/transmitting device using results of the learning operation such that the transmission ratio of the shifting/transmitting device changes.
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11. A drive system that drives a drive shaft, comprising:
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a motor that outputs power;
shifting/transmitting means for transmitting power from a rotating shaft of the motor to the drive shaft, and changing a transmission ratio between the rotating shaft of the motor and the drive shaft by driving an actuator;
shift learning means for performing a learning operation to learn at least one of an operational state of the actuator and an operational state of the motor, when the transmission ratio of the shifting/transmitting means is changed such that an amount of change in driving force on the drive shaft side, that is output to the drive shaft from the motor via the shifting/transmitting means, is within a predetermined range; and
shift control means for controlling the actuator of the shifting/transmitting means using results of the learning operation such that the transmission ratio of the shifting/transmitting means changes.
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Specification