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US 11,543,027 B1Granted
Line pressure control method for DCT
AssigneesHyundai Motor Company, Kia Corporation
InventorsKi Hyung Joo, Young Ho Ko
Life of this patent
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Abstract
A line pressure control method for a double clutch transmission (DCT) includes estimating a line pressure, which decreases with stoppage of an electric oil pump, based on a linear regression model using state variables of the DCT that are related to a line pressure change, and driving the electric oil pump when the line pressure estimated based on the linear regression model reaches a predetermined lower limit.
Claims19
A line pressure control method for a double clutch transmission (DCT), the method comprising:
- estimating, by a controller, a line pressure, which decreases with stoppage of an electric oil pump, based on a linear regression model using state variables of the DCT that are related to a line pressure change;
- and
- driving, by the controller, the electric oil pump when the line pressure estimated based on the linear regression model reaches a predetermined lower limit.
A double clutch transmission (DCT), comprising:
- a controller;
- an electric oil pump electrically connected to the controller;
- a first actuator fluidically connected to the electric oil pump;
- a second actuator fluidically connected to the electric oil pump;
- a first solenoid that is electrically connected to the controller and drives the first actuator provided to engage a first gear of the DCT;
- a second solenoid that is electrically connected to the controller and drives the second actuator provided to engage a second gear of the DCT, wherein a line pressure is provided to drive the first and second actuators for shifting gears of the DCT,
- wherein the controller is configured to:
- estimate the line pressure, which decreases with stoppage of the electric oil pump, based on a linear regression model using state variables of the DCT that are related to a line pressure change;
- and
- drive the electric oil pump when the line pressure estimated based on the linear regression model reaches a predetermined lower limit.
7 more elements
Dependencies are inferred from the claim text.