Control Device for Multi-Disc Lock-Up Clutch
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHironobu ARATAKE, Norihiro TSUKAMOTO, Tomohiro ASAMI
Life of this patent
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Abstract
Lock-up clutch engagement hydraulic pressure learning control can be precisely performed by starting lock-up clutch engagement control and executing the lock-up clutch engagement hydraulic pressure learning control after execution of shift control is completed, in a case where the lock-up clutch engagement control is limited in a shift stage before execution of the shift control, when the shift control is executed in a state where a multi-disc lock-up clutch is released. Meanwhile, a decrease in fuel efficiency performance and a direct steering feeling is minimized by starting the lock-up clutch engagement control during shift control in a case where the lock-up clutch engagement control is not limited.
Claims3
A control device for a multi-disc lock-up clutch provided in a transmission of a vehicle, the control device comprising
- an electronic control unit configured to
- i) perform shift control of the transmission,
- ii) perform engagement control of the multi-disc lock-up clutch,
- iii) a) start the engagement control of the multi-disc lock-up clutch and b) learn engagement hydraulic pressure of the multi-disc lock-up clutch, after execution of the shift control is completed, when the shift control is executed in a state where the multi-disc lock-up clutch is released while the electronic control unit limits engagement control of the multi-disc lock-up clutch in a shift stage before the execution of the shift control, and
- iv) start the engagement control of the multi-disc lock-up clutch during the shift control when the shift control is executed in a state where the multi-disc lock-up clutch is released while the electronic control unit does not limit the engagement control of the lock-up clutch in a shift stage before the execution of the shift control.
Dependencies are inferred from the claim text.