Patents by Inventor Chi-Kuan Kao
Chi-Kuan Kao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9482329Abstract: A torque transmission device for a powertrain system includes a continuously variable unit (CVU) of a continuously variable transmission (CVT) arranged in parallel with a fixed-gear-ratio transmission. The fixed-gear-ratio transmission includes first and second planetary gear sets and a plurality of transmission clutches, wherein the first and second planetary gear sets are arranged to transfer torque between an input member and an output member in one of first and second fixed-gear-ratio modes by selectively activating the transmission clutches. The torque transmission device operates in a first fixed overdrive input/output speed ratio when the CVU input clutch is deactivated and a first set of two of the transmission clutches is activated. The torque transmission device operates in a second fixed overdrive input/output speed ratio when the CVU input clutch is deactivated and a second set of two of the transmission clutches is activated.Type: GrantFiled: January 8, 2015Date of Patent: November 1, 2016Assignee: GM Global Technology Operations LLCInventors: Chi-Kuan Kao, Chunhao J. Lee, Kumaraswamy V. Hebbale, Farzad Samie
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Publication number: 20160201780Abstract: A torque transmission device for a powertrain system includes a continuously variable unit (CVU) of a continuously variable transmission (CVT) arranged in parallel with a fixed-gear-ratio transmission. The fixed-gear-ratio transmission includes first and second planetary gear sets and a plurality of transmission clutches, wherein the first and second planetary gear sets are arranged to transfer torque between an input member and an output member in one of first and second fixed-gear-ratio modes by selectively activating the transmission clutches. The torque transmission device operates in a first fixed overdrive input/output speed ratio when the CVU input clutch is deactivated and a first set of two of the transmission clutches is activated. The torque transmission device operates in a second fixed overdrive input/output speed ratio when the CVU input clutch is deactivated and a second set of two of the transmission clutches is activated.Type: ApplicationFiled: January 8, 2015Publication date: July 14, 2016Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Chi-Kuan Kao, Chunhao J. Lee, Kumaraswamy V. Hebbale, Farzad Samie
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Publication number: 20160201779Abstract: A torque transmission device for a powertrain system is described, and includes a continuously variable unit (CVU) of a continuously variable transmission (CVT) arranged in parallel with a fixed-gear-ratio transmission to transfer torque between a transmission input member and a transmission output member. The fixed-gear-ratio transmission includes first and second planetary gear sets arranged to transfer torque between the transmission input member and the transmission output member in one of a plurality of fixed-gear-ratio modes by selectively activating a plurality of transmission clutches. The transmission input member rotatably couples to one of the nodes of the first planetary gear set and one of the nodes of the second planetary gear set. The torque transmission device transfers torque in one of a continuously variable mode, a fixed underdrive input/output speed ratio, or a fixed overdrive input/output speed ratio.Type: ApplicationFiled: January 8, 2015Publication date: July 14, 2016Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Chi-Kuan Kao, Chunhao J. Lee, Kumaraswamy V. Hebbale, Farzad Samie
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Patent number: 9358867Abstract: A powertrain system in a hybrid vehicle includes a hydraulic device, a pilot valve, and a regulator valve. The pilot valve is operably connected to the hydraulic device and configured to actuate. The pilot valve includes at least one micro-electro-mechanical systems (MEMS) based device. The regulator valve is operably connected to the pilot valve and the hydraulic device. The regulator valve is configured to direct fluid to the hydraulic device based on the actuation of the pilot valve.Type: GrantFiled: June 23, 2011Date of Patent: June 7, 2016Assignee: GM Global Technology Operations LLCInventors: Chunhao J. Lee, Farzad Samie, Chi-Kuan Kao, Kumaraswamy V. Hebbale, Dongxu Li, Andrew L. Bartos, Kevin B. Rober
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Patent number: 9194490Abstract: A wet dual clutch transmission includes at least one hydraulic component and a pilot valve operably connected to the hydraulic component to actuate the hydraulic component. The pilot valve includes a Micro-Electro-Mechanical Systems (MEMS) based pressure differential actuator valve. The hydraulic component may include but is not limited to a first clutch and a second clutch of the wet dual clutch transmission, a lube regulator valve, an on/off solenoid, a synchronizing shift fork or a line pressure control valve.Type: GrantFiled: May 24, 2011Date of Patent: November 24, 2015Assignee: GM Global Technology Operations LLCInventors: Chi-Kuan Kao, Farzad Samie, Chunhao J. Lee, Dongxu Li, Kumaraswamy V. Hebbale, Andrew L. Bartos, Kevin B. Rober
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Patent number: 9057409Abstract: An actuation system for actuating a clutch piston of a transmission includes an actuator and a lever. A first end of the lever is attached to the actuator. The lever is pivotable about a lever connection location. Movement of the actuator rotates the lever about the lever connection location. A spring assembly is pivotable about a spring connection location, and pivotably connected to the lever at a second end of the lever. When the actuator is disposed in an un-actuated position, the spring assembly is positioned such that a pre-loaded spring force is directed along a zero moment path to generate a zero moment in the lever. When the actuator is disposed in an actuated position, the spring assembly is rotated so that the spring force is directed along a moment generating path in order to generate a moment in the lever to rotate the lever.Type: GrantFiled: April 9, 2013Date of Patent: June 16, 2015Assignees: GM Global Technology Operations LLC, Shanghai Jiao Tong UniversityInventors: Li Chen, Jian Yao, Chunhao J. Lee, Chengliang Yin, Chi-Kuan Kao, Farzad Samie, Dongxu Li
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Patent number: 8935971Abstract: An automatic transmission for a vehicle includes a hydraulically-controlled component and a pilot valve. The pilot valve includes at least one micro-electrical-mechanical systems (MEMS) based device. The pilot valve is operably connected to and is configured for actuating the hydraulically-controlled component. The pilot valve additionally includes a regulating valve operably connected to the pilot valve and to the hydraulically-controlled component. The regulating valve is configured to direct fluid to the hydraulically-controlled component when actuated by the pilot valve.Type: GrantFiled: April 28, 2011Date of Patent: January 20, 2015Assignee: GM Global Technology Operations LLCInventors: Farzad Samie, Andrew L. Bartos, Chunhao J. Lee, Chi-Kuan Kao, Kumaraswamy V. Hebbale, Dongxu Li, Kevin B. Rober
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Patent number: 8936141Abstract: A continuously variable transmission (CVT) for a vehicle includes a hydraulically-controlled component and a pilot valve. The pilot valve includes at least one micro-electrical-mechanical-systems (MEMS) based device. The pilot valve is operably connected to and is configured for actuating the hydraulically-controlled component. The pilot valve additionally includes a regulating valve operably connected to the pilot valve and to the hydraulically-controlled component. The regulating valve is configured to direct fluid to the hydraulically-controlled component when actuated by the pilot valve.Type: GrantFiled: May 24, 2011Date of Patent: January 20, 2015Assignee: GM Global Technology Operations LLCInventors: Farzad Samie, Chi-Kuan Kao, Kumaraswamy V. Hebbale, Chunhao J. Lee, Dongxu Li, Andrew L. Bartos, Kevin B. Rober
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Patent number: 8925699Abstract: A pressure and flow control system includes a hydraulically-controlled component, a pilot valve, and a regulating valve. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal, which controls the hydraulically-controlled component.Type: GrantFiled: August 1, 2011Date of Patent: January 6, 2015Assignee: GM Global Technology Operations LLCInventors: Dongxu Li, Farzad Samie, Chunhao J. Lee, Kumaraswamy V. Hebbale, Chi-Kuan Kao, Andrew L. Bartos, Kevin B. Rober, Bret M. Olson
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Patent number: 8887891Abstract: A pressure and flow control system for a dog clutch includes a pilot valve, a regulating valve, and a selector. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal. The selector is configured to engage and disengage the dog clutch in response to the control signal.Type: GrantFiled: June 23, 2011Date of Patent: November 18, 2014Assignee: GM Global Technology Operations LLCInventors: Chunhao J. Lee, Farzad Samie, Chi-Kuan Kao, Kumaraswamy V. Hebbale, Dongxu Li, Andrew L. Bartos, Kevin B. Rober
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Publication number: 20140299441Abstract: An actuation system for actuating a clutch piston of a transmission includes an actuator and a lever. A first end of the lever is attached to the actuator. The lever is pivotable about a lever connection location. Movement of the actuator rotates the lever about the lever connection location. A spring assembly is pivotable about a spring connection location, and pivotably connected to the lever at a second end of the lever. When the actuator is disposed in an un-actuated position, the spring assembly is positioned such that a pre-loaded spring force is directed along a zero moment path to generate a zero moment in the lever. When the actuator is disposed in an actuated position, the spring assembly is rotated so that the spring force is directed along a moment generating path in order to generate a moment in the lever to rotate the lever.Type: ApplicationFiled: April 9, 2013Publication date: October 9, 2014Applicants: Shanghai Jiao Tong University, GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Li Chen, Jian Yao, Chunhao J. Lee, Chengliang Yin, Chi-Kuan Kao, Farzad Samie, Dongxu Li
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Patent number: 8845491Abstract: An automated manual transmission includes a hydraulic device, a pilot valve, and a regulating valve. The pilot valve is operably connected to the hydraulic device and configured to actuate. The pilot valve includes at least one micro-electro-mechanical systems (MEMS) based device. The regulating valve is operably connected to the pilot valve and the hydraulic device. The regulating valve is configured to direct fluid to the hydraulic device based on the actuation of the pilot valve.Type: GrantFiled: August 1, 2011Date of Patent: September 30, 2014Assignee: GM Global Technology Operations LLCInventors: Dongxu Li, Farzad Samie, Chunhao J. Lee, Kumaraswamy V. Hebbale, Chi-Kuan Kao, Andrew L. Bartos, Kevin B. Rober, Bret M. Olson
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Patent number: 8844702Abstract: A clutch includes a pilot valve, a regulating valve, and a clutch control valve. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal. The clutch control valve is configured to engage and disengage the clutch in response to the control signal. The clutch may be configured as one of a wet clutch and a dry clutch.Type: GrantFiled: July 20, 2011Date of Patent: September 30, 2014Assignee: GM Global Technology Operations LLCInventors: Chunhao J. Lee, Farzad Samie, Chi-Kuan Kao, Dongxu Li, Kumaraswamy V. Hebbale, Andrew L. Bartos, Kevin B. Rober
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Patent number: 8844694Abstract: A dry dual clutch transmission includes at least one hydraulic component and a pilot valve operably connected to the hydraulic component to actuate the hydraulic component. The pilot valve includes a Micro-Electro-Mechanical Systems (MEMS) based pressure differential actuator valve. The hydraulic component may include but is not limited to a first clutch and a second clutch of the dry dual clutch transmission, an on/off solenoid, a line pressure control valve or a synchronizing shift fork.Type: GrantFiled: May 24, 2011Date of Patent: September 30, 2014Assignee: GM Global Technology Operations LLCInventors: Kumaraswamy V. Hebbale, Farzad Samie, Chunhao J. Lee, Dongxu Li, Andrew L. Bartos, Chi-Kuan Kao, Kevin B. Rober
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Patent number: 8800404Abstract: A powertrain system in a mild hybrid vehicle includes a hydraulic device, a pilot valve, and a regulator valve. The pilot valve is operably connected to the hydraulic device and configured to actuate. The pilot valve includes at least one micro-electro-mechanical systems (MEMS) based device. The regulator valve is operably connected to the pilot valve and the hydraulic device. The regulator valve is configured to direct fluid to the hydraulic device based on the actuation of the pilot valve.Type: GrantFiled: June 23, 2011Date of Patent: August 12, 2014Assignee: GM Global Technology Operations LLCInventors: Chunhao J. Lee, Chi-Kuan Kao, Farzad Samie, Kumaraswamy V. Hebbale, Dongxu Li, Andrew L. Bartos, Kevin B. Rober
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Patent number: 8794411Abstract: A pressure control system configured to control a selectable one-way clutch (SOWC) includes a pilot valve and a SOWC actuator. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The pressure control system may further include a regulating valve in fluid communication with the pilot valve and configured to receive the pilot signal. The regulating valve is further configured to output a control signal. The SOWC actuator is configured to select between operating modes of the selectable one-way clutch in response to one of the pilot signal and the control signal.Type: GrantFiled: June 23, 2011Date of Patent: August 5, 2014Assignee: GM Global Technology Operations LLCInventors: Chunhao J. Lee, Chi-Kuan Kao, Farzad Samie, Kumaraswamy V. Hebbale, Dongxu Li, Andrew L. Bartos, Kevin B. Rober
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Patent number: 8794417Abstract: A pressure and flow control system for a torque converter clutch includes a pilot valve, a regulating valve, and a torque converter control valve. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal. The torque converter control valve is configured to engage and disengage the torque converter clutch in response to the control signal.Type: GrantFiled: June 23, 2011Date of Patent: August 5, 2014Assignee: GM Global Technology Operations LLCInventors: Chunhao J. Lee, Farzad Samie, Chi-Kuan Kao, Kumaraswamy V. Hebbale, Dongxu Li, Andrew L. Bartos, Kevin B. Rober
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Patent number: 8708854Abstract: A torque transmitting system includes a case, first and second clutch plates, and a ramp member that is selectively rotatable about an axis and that defines a ramp surface. The system also includes an electric motor having a motor housing, wherein the case is rotatable relative to the housing about the axis. The motor is configured to selectively apply torque to rotate the ramp member. The system additionally includes a roller element mounted with respect to the case and contacting the ramp surface. The ramp surface is configured such that, when the ramp member is rotated about the axis, the roller element exerts a reaction force on the ramp surface that urges the ramp member to move in a first axial direction and thereby transmit the reaction force to the clutch plates. A transmission assembly including the above described torque transmitting system is also disclosed.Type: GrantFiled: January 26, 2012Date of Patent: April 29, 2014Assignee: GM Global Technology Operations LLCInventors: Li Chen, Jian Yao, Chunhao J. Lee, Chi-Kuan Kao, Farzad Samie, Yu Dong, Chengliang Yin
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Patent number: 8695774Abstract: A pressure control system includes a hydraulically-controlled component, a pilot valve, and a regulating valve. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal, which controls the hydraulically-controlled component.Type: GrantFiled: June 23, 2011Date of Patent: April 15, 2014Assignee: GM Global Technology Operations LLCInventors: Chunhao J. Lee, Chi-Kuan Kao, Farzad Samie, Dongxu Li, Kumaraswamy V. Hebbale, Andrew L. Bartos, Kevin B. Rober
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Patent number: 8620543Abstract: A vehicle includes a powertrain having first and second rotatable members, speed sensors, and a controller. The speed sensors generate output signals encoding the speeds of the respective first and second rotatable members. The controller calculates a rotation angle of the members using the output signals and estimates a torque value in the powertrain as a function of the rotation angles. The sensors may count the teeth of respective first and second toothed gear elements and encode the count as the output signals. The controller may estimate the torque value as a function of a linear coefficient and the present gear ratio of the sensors. The controller may also detect a commanded upshift of the transmission and detect a fill event of an oncoming clutch of the transmission as a function of the corresponding rotation angles for the rotatable members. The members may be input, output, or intermediate members.Type: GrantFiled: April 13, 2012Date of Patent: December 31, 2013Assignee: GM Global Technology Operations LLCInventors: Dongxu Li, Kumaraswamy V. Hebbale, Farzad Samie, Chunhao J. Lee, Chi-Kuan Kao