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公开(公告)号：US11543027B1
公开(公告)日：2023-01-03
申请号：US17692003
申请日：2022-03-10
发明人： Ki Hyung Joo , Young Ho Ko
IPC分类号： F16H61/688 , F16H61/00 , F16H61/28
摘要： 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.
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公开(公告)号：US11603893B1
公开(公告)日：2023-03-14
申请号：US17741741
申请日：2022-05-11
发明人： Young Ho Ko , Chi Hun Cho , Soo Young Kim
摘要： A method of setting a clutch control reference value includes monitoring the pressure of a clutch while a controller applies test current having a predetermined amplitude and frequency to a solenoid valve in the manner of gradually reducing the magnitude of the test current from a predetermined entry value, applying, when the amplitude of the pressure of the clutch starts to change, predetermined checking current, the checking current vertically oscillating based on the magnitude of current when the amplitude of the pressure of the clutch starts to change as a central value, and determining a volumetric kiss point (VKP) by comparing the amplitude of the pressure of the clutch according to application of the checking current with a predetermined reference range.
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公开(公告)号：US11441622B1
公开(公告)日：2022-09-13
申请号：US17461538
申请日：2021-08-30
发明人： Young Ho Ko , Woo Jung Kim , Young Min Yoon
IPC分类号： F16D48/06 , F16D25/0638 , F16D13/52 , F16D21/00 , F16D48/08
摘要： A method of setting a clutch control reference value may make it possible to more accurately learn the VKP of a hydraulic multi-plate clutch controlled by a solenoid valve, improving the accuracy of clutch control, and furthermore, to improve the quality of shifting a vehicle by the precise control of a transmission provided with such a clutch.
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公开(公告)号：US10926770B2
公开(公告)日：2021-02-23
申请号：US16664011
申请日：2019-10-25
发明人： Young Ho Ko , Ho Young Lee
IPC分类号： B60W10/02 , B60W10/113 , B60W30/19
摘要： A method of controlling a dual clutch transmission, may include releasing a pressure of a non-driveshaft clutch and engaging a gear of a non-driveshaft; applying a first pressure to the non-driveshaft clutch and disengaging the gear of the non-driveshaft; determining a drag torque on the basis of a first rotation speed change rate of the non-driveshaft; releasing the first pressure and engaging the gear of the non-driveshaft; applying a second pressure to the non-driveshaft clutch and disengaging the gear of the non-driveshaft; determining a touch point torque on the basis of a second rotation speed change rate of the non-driveshaft; and adjusting a touch point of the non-driveshaft clutch on the basis of a net torque which is a difference between the touch point torque and the drag torque.
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公开(公告)号：US10801611B1
公开(公告)日：2020-10-13
申请号：US16531439
申请日：2019-08-05
发明人： Jin Sung Kim , Young Ho Ko , Young Min Yoon
摘要： A method of controlling line pressure of a hydraulic circuit of a transmission, may include turning on electric current by a controller to apply the electric current to an electric oil pump and determining line pressure depending on the electric current applied; and turning off the electric current by the controller so that the electric current being applied to the electric oil pump is cut off when the determined line pressure is greater than a predetermined reference upper limit value, estimating line pressure dropping down with a passage of time and determining the estimated line pressure, wherein when the estimated line pressure becomes lower than a predetermined reference lower limit value, the turning on the electric current is repeated.
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公开(公告)号：US10801562B2
公开(公告)日：2020-10-13
申请号：US16276905
申请日：2019-02-15
发明人： Young Ho Ko , Ho Young Lee
摘要： A clutch control method may include generating a current-hydraulic pressure model by obtaining an increasing slope of a measured hydraulic pressure which is applied to a clutch in accordance with an increase of a primary ramp current while applying the primary ramp current to a solenoid valve that controls hydraulic pressure to be supplied to the clutch; obtaining a difference between a virtual hydraulic pressure according to the current-hydraulic pressure model and a measured hydraulic pressure applied to the clutch for a secondary ramp current while applying the secondary ramp current to the solenoid valve after removing the primary ramp current; performing updating by learning a secondary ramp current, at which the difference between the virtual hydraulic pressure and the measured hydraulic pressure is maximum, as a Volumetric Kiss Point (VKP); and controlling the clutch on the basis of the learned VKP.
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公开(公告)号：US10138957B2
公开(公告)日：2018-11-27
申请号：US15644096
申请日：2017-07-07
申请人： HYUNDAI MOTOR COMPANY , KIA MOTORS CORPORATION , IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
发明人： Jin Sung Kim , Ho Young Lee , Jahng Hyon Park , Young Ho Ko
IPC分类号： F16D48/06
摘要： A clutch control method for a vehicle includes steps of: calculating, by a controller, an estimated clutch torque by substituting a plurality of parameters, and a sensed stroke of a clutch actuator into a predetermined characteristic function; updating, by the controller, the parameters as new values by a prediction error method using a torque error, which is a difference between a reference clutch torque and the estimated clutch torque; calculating a desired stroke by substituting a desired clutch torque and the updated parameters into a predetermined characteristic inverse function; and driving the clutch actuator based on the calculated desired stroke to control the clutch by the controller. The plurality parameters represent physical properties of a clutch, and the predetermined characteristic function represents characteristics of a clutch transmission torque to a clutch actuator stroke. In addition, the predetermined characteristic inverse function represents a clutch actuator stroke to a clutch transmission torque.
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公开(公告)号：US10830342B2
公开(公告)日：2020-11-10
申请号：US16539147
申请日：2019-08-13
发明人： Young Ho Ko , Hwa Young Lee , Young Min Yoon , Jin Sung Kim
IPC分类号： F16H61/00 , B60W10/113
摘要： A line pressure control method for a dual-clutch transmission (DCT), may include a hydraulic-pressure-decreasing operation of interrupting, by a controller, the supply of current to an electric oil pump and estimating a decrease in a line pressure using a line pressure model based on a pressure accumulator mounted in a hydraulic pressure line, a pump-driving operation of, when the estimated line pressure is equal to or less than a predetermined lower-limit value, driving, by the controller, the electric oil pump, and a hydraulic-pressure-increasing operation of determining, by the controller, the line pressure based on the current supplied to the electric oil pump and to determine whether the determined line pressure is equal to or greater than a predetermined upper-limit value.
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公开(公告)号：US11078971B2
公开(公告)日：2021-08-03
申请号：US16804684
申请日：2020-02-28
发明人： Young Ho Ko , Tae Hee Cho , Ho Young Lee
摘要： Disclosed is a clutch control reference value setting method including generating a current-hydraulic pressure model, setting a temporary VKP to a current causing a maximum difference between a model hydraulic pressure and a measured hydraulic pressure, determining that the temporary VKP is valid when a deflection amount calculated from a difference integral value acquired by integrating differences between the model hydraulic pressure and the measured hydraulic pressure while increasing the current is greater than a first reference value under a condition that the first target pressure is applied to the clutch, determining that the temporary VKP is appropriate when a deflection amount calculated from a difference integral value acquired by integrating differences between the model hydraulic pressure and the measured hydraulic pressure while increasing the current is proper under a condition that a second target pressure is applied to the clutch.
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公开(公告)号：US20210131509A1
公开(公告)日：2021-05-06
申请号：US16804684
申请日：2020-02-28
发明人： Young Ho Ko , Tae Hee Cho , Ho Young Lee
摘要： Disclosed is a clutch control reference value setting method including generating a current-hydraulic pressure model, setting a temporary VKP to a current causing a maximum difference between a model hydraulic pressure and a measured hydraulic pressure, determining that the temporary VKP is valid when a deflection amount calculated from a difference integral value acquired by integrating differences between the model hydraulic pressure and the measured hydraulic pressure while increasing the current is greater than a first reference value under a condition that the first target pressure is applied to the clutch, determining that the temporary VKP is appropriate when a deflection amount calculated from a difference integral value acquired by integrating differences between the model hydraulic pressure and the measured hydraulic pressure while increasing the current is proper under a condition that a second target pressure is applied to the clutch.
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