CONTROL DEVICE AND CONTROL METHOD OF AUTOMATIC TRANSMISSION
First Claim
1. A control device of an automatic transmission, comprising:
- an automatic transmission coupled to an engine and having a gear-change mechanism portion and a clutch to transmit motive power from the engine to the gear-change mechanism portion;
a clutch control portion to engage and disengage the clutch; and
a motor control portion to control an output of a motor that executes a control operation on the clutch control portion,wherein the motor control portion includes;
a target motor current computation portion that computes a target motor current according to a desired driving state;
a motor current detection portion that detects plural motor currents respectively corresponding to plural detection timings;
a selection portion that selects a motor current corresponding to the desired driving state among the plural motor currents that have been detected; and
a motor driving portion that applies feedback control on the output of the motor according to a difference between the target motor current and the motor current that has been selected.
1 Assignment
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Accused Products
Abstract
A control device of an automatic transmission includes a motor control portion to control an output of a motor that executes a control operation on a clutch control portion. The motor control portion includes a target motor current computation portion that computes a target motor current according to a desired driving state, a motor current detection portion that detects plural motor currents respectively corresponding to plural detection timings, a selection portion that selects a motor current corresponding to the desired driving state among the detected plural motor currents, and a motor driving portion that applies feedback control on an output of the motor according to a difference between the target motor current and the selected motor current. Hence, not only can the most suitable clutch control be applied for each gear-change interval at gear change, but also the comfortable feeling during the driving and the fuel efficiency can be enhanced.
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Citations
5 Claims
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1. A control device of an automatic transmission, comprising:
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an automatic transmission coupled to an engine and having a gear-change mechanism portion and a clutch to transmit motive power from the engine to the gear-change mechanism portion; a clutch control portion to engage and disengage the clutch; and a motor control portion to control an output of a motor that executes a control operation on the clutch control portion, wherein the motor control portion includes; a target motor current computation portion that computes a target motor current according to a desired driving state; a motor current detection portion that detects plural motor currents respectively corresponding to plural detection timings; a selection portion that selects a motor current corresponding to the desired driving state among the plural motor currents that have been detected; and a motor driving portion that applies feedback control on the output of the motor according to a difference between the target motor current and the motor current that has been selected. - View Dependent Claims (2, 3, 4)
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5. A control method of an automatic transmission composed of an automatic transmission coupled to an engine and having a gear-change mechanism portion and a clutch to transmit motive power from the engine to the gear-change mechanism portion, a clutch control portion to engage and disengage the clutch, and a motor control portion to control an output of a motor that executes a control operation on the clutch control portion, the control method comprising, as operations by the motor control portion:
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computing a target motor current for a desired driving state; detecting plural motor currents respectively corresponding to plural detection timings; selecting a motor current corresponding to the desired driving state among the plural motor currents that have been detected; and applying feedback control on the output of the motor according to a difference between the target motor current and the motor current that has been selected.
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Specification