Patents by Inventor Yixin Yao
Yixin Yao 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: 11654875Abstract: A vehicle includes an electric machine, friction brakes, a drivetrain, and a controller. The electric machine is configured to recharge a battery during regenerative braking. The friction brakes are configured to apply torque to wheels of the vehicle to slow the vehicle. The controller is programmed to, in response to and during an anti-locking braking event, generate a signal indicative of a total torque demand to brake the vehicle based on a difference between a desired wheel slip ratio and an actual wheel slip ratio, adjust a regenerative braking torque based on a product of the signal and a regenerative braking weighting coefficient, adjust a friction braking torque based on a product of the signal and a friction braking weighting coefficient, and further adjust the regenerative braking torque based on a closed-loop control of an estimated regenerative braking torque feedback.Type: GrantFiled: January 21, 2020Date of Patent: May 23, 2023Assignee: Ford Global Technologies, LLCInventors: Yixin Yao, Yanan Zhao, Mark Steven Yamazaki
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Patent number: 11548372Abstract: Methods and system for operating a vehicle cooling system are described. In one example, the vehicle cooling system cools a heat generating device via a fan and pump. A speed of the fan is commanded by a feedback controller with possible neural network predictive control to track a variable temperature reference that is based on thermal load estimation. A disturbance observer may be applied to observe thermal load and an observer-based observer may be used to generate the temperature reference so that the power consumption of a fan is minimized.Type: GrantFiled: February 22, 2021Date of Patent: January 10, 2023Assignee: Ford Global Technologies, LLCInventors: Yixin Yao, Hassan Farhat, Rajit Johri, Ravi Gopal
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Patent number: 11541775Abstract: A vehicle includes a battery, an electric machine, and a controller. The battery has a state of charge. The electric machine is configured to draw electrical power from the battery to propel the vehicle in response to an acceleration request and to deliver electrical power to the battery to recharge the battery. The controller is programmed to adjust an estimation of battery state of charge based on a feed forward control that includes a coulomb counting algorithm, a first feedback control that includes a first battery model, and a second feedback control that includes a second battery model. The controller is further programmed to control the electrical power flow between the battery and the electric machine based on the estimation of the state of charge of the battery.Type: GrantFiled: February 4, 2020Date of Patent: January 3, 2023Assignee: Ford Global Technologies, LLCInventors: Yixin Yao, Xiaohong Duan, Mark Steven Yamazaki, Richard Dyche Anderson
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Publication number: 20220266680Abstract: Methods and system for operating a vehicle cooling system are described. In one example, the vehicle cooling system cools a heat generating device via a fan and pump. A speed of the fan is commanded by a feedback controller with possible neural network predictive control to track a variable temperature reference that is based on thermal load estimation. A disturbance observer may be applied to observe thermal load and an observer-based observer may be used to generate the temperature reference so that the power consumption of a fan is minimized.Type: ApplicationFiled: February 22, 2021Publication date: August 25, 2022Inventors: Yixin Yao, Hassan Farhat, Rajit Johri, Ravi Gopal
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Publication number: 20220082047Abstract: Methods and systems are provided for adjusting operation of each of a pump and a fan of an engine cooling system. In one example, a method may include adjusting a speed of the pump and a speed of the fan based on one or more of a temperature of coolant entering a heat exchanger of the cooling system, a temperature of air exiting the heat exchanger, and a temperature of air entering the heat exchanger.Type: ApplicationFiled: September 17, 2020Publication date: March 17, 2022Inventors: Hassan Farhat, Ravi Gopal, Yixin Yao
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Patent number: 11273713Abstract: A vehicle includes an axle, electric machine, friction, brakes, and a controller. The axle has an input shaft to an open differential and output shaft extending out of the open differential. The electric machine is secured to the input shaft and wheels are secured to the output shafts. The controller is programmed to, in response to an anti-locking braking event, generate a signal indicative of a total torque demand to brake the vehicle based on a difference between a desired and an actual wheel slip ratio, adjust a regenerative braking torque of the electric machine based on signal and a regenerative braking weighting coefficient to maintain or drive actual wheel slip toward the desired wheel slip, and adjust a friction braking torque of the friction brakes based on the signal and a friction braking weighting coefficient to drive actual wheel slip at or toward the desired wheel slip.Type: GrantFiled: September 19, 2019Date of Patent: March 15, 2022Assignee: Ford Global Technologies, LLCInventors: Yixin Yao, Yanan Zhao, Mark Steven Yamazaki
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Patent number: 11274595Abstract: Methods and systems are provided for adjusting operation of each of a pump and a fan of an engine cooling system. In one example, a method may include adjusting a speed of the pump and a speed of the fan based on one or more of a temperature of coolant entering a heat exchanger of the cooling system, a temperature of air exiting the heat exchanger, and a temperature of air entering the heat exchanger.Type: GrantFiled: September 17, 2020Date of Patent: March 15, 2022Assignee: Ford Global Technologies, LLCInventors: Hassan Farhat, Ravi Gopal, Yixin Yao
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Patent number: 11225244Abstract: A system and method is disclosed for engine starting and transmission shifting where a controller may be operable to decrease a torque of a motor and operate a starter-generator (ISG) to start an engine responsive to a command to shift the transmission and start the engine. The controller may disengage a second clutch and subsequently shift the transmission to a target gear ratio speed responsive to the torque of the motor achieving zero. The controller may increase respective torques of the motor, ISG, and engine to drive a speed of the motor, ISG, and engine toward a target speed defined by the target gear speed responsive to completion of the shift. The controller may engage the second clutch responsive to the speed of the motor achieving the target speed and engage a disconnect clutch responsive to the respective speeds of the ISG and engine achieving the target speed.Type: GrantFiled: May 30, 2019Date of Patent: January 18, 2022Assignee: Ford Global Technologies, LLCInventors: Jason Meyer, Dushyant Palejiya, Rajit Johri, Yixin Yao
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Patent number: 11180125Abstract: A vehicle includes an axle, an electric machine, a first wheel, a second wheel, a first friction brake, a second friction brake, and a controller. The controller is programmed to, in response to and during an anti-locking braking event, generate first and second signals indicative of a braking torque demand at the first and second wheels, respectively, based on a difference between a desired wheel slip ratio and an actual wheel slip ratio of the first and second wheels, respectively, adjust a regenerative braking torque of the electric machine based on a product of the first signal and a regenerative braking weighting coefficient, adjust a first friction braking torque based on a product of the first signal and a friction braking weighting coefficient, and adjust a second friction braking torque based on the second signal and dynamics of the first and second output shafts.Type: GrantFiled: September 19, 2019Date of Patent: November 23, 2021Assignee: Ford Global Technologies, LLCInventors: Yixin Yao, Yanan Zhao, Mark Steven Yamazaki
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Publication number: 20210237614Abstract: A vehicle includes a battery, an electric machine, and a controller. The battery has a state of charge. The electric machine is configured to draw electrical power from the battery to propel the vehicle in response to an acceleration request and to deliver electrical power to the battery to recharge the battery. The controller is programmed to adjust an estimation of battery state of charge based on a feed forward control that includes a coulomb counting algorithm, a first feedback control that includes a first battery model, and a second feedback control that includes a second battery model. The controller is further programmed to control the electrical power flow between the battery and the electric machine based on the estimation of the state of charge of the battery.Type: ApplicationFiled: February 4, 2020Publication date: August 5, 2021Inventors: Yixin Yao, Xiaohong Duan, Mark Steven Yamazaki, Richard Dyche Anderson
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Publication number: 20210221343Abstract: A vehicle includes an electric machine, friction brakes, a drivetrain, and a controller. The electric machine is configured to recharge a battery during regenerative braking. The friction brakes are configured to apply torque to wheels of the vehicle to slow the vehicle. The controller is programmed to, in response to and during an anti-locking braking event, generate a signal indicative of a total torque demand to brake the vehicle based on a difference between a desired wheel slip ratio and an actual wheel slip ratio, adjust a regenerative braking torque based on a product of the signal and a regenerative braking weighting coefficient, adjust a friction braking torque based on a product of the signal and a friction braking weighting coefficient, and further adjust the regenerative braking torque based on a closed-loop control of an estimated regenerative braking torque feedback.Type: ApplicationFiled: January 21, 2020Publication date: July 22, 2021Inventors: Yixin Yao, Yanan Zhao, Mark Steven Yamazaki
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Publication number: 20210086623Abstract: A vehicle includes an axle, electric machine, friction, brakes, and a controller. The axle has an input shaft to an open differential and output shaft extending out of the open differential. The electric machine is secured to the input shaft and wheels are secured to the output shafts. The controller is programmed to, in response to an anti-locking braking event, generate a signal indicative of a total torque demand to brake the vehicle based on a difference between a desired and an actual wheel slip ratio, adjust a regenerative braking torque of the electric machine based on signal and a regenerative braking weighting coefficient to maintain or drive actual wheel slip toward the desired wheel slip, and adjust a friction braking torque of the friction brakes based on the signal and a friction braking weighting coefficient to drive actual wheel slip at or toward the desired wheel slip.Type: ApplicationFiled: September 19, 2019Publication date: March 25, 2021Inventors: Yixin Yao, Yanan Zhao, Mark Steven Yamazaki
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Publication number: 20210086736Abstract: A vehicle includes an axle, an electric machine, a first wheel, a second wheel, a first friction brake, a second friction brake, and a controller. The controller is programmed to, in response to and during an anti-locking braking event, generate first and second signals indicative of a braking torque demand at the first and second wheels, respectively, based on a difference between a desired wheel slip ratio and an actual wheel slip ratio of the first and second wheels, respectively, adjust a regenerative braking torque of the electric machine based on a product of the first signal and a regenerative braking weighting coefficient, adjust a first friction braking torque based on a product of the first signal and a friction braking weighting coefficient, and adjust a second friction braking torque based on the second signal and dynamics of the first and second output shafts.Type: ApplicationFiled: September 19, 2019Publication date: March 25, 2021Inventors: Yixin Yao, Yanan Zhao, Mark Steven Yamazaki
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Publication number: 20200377075Abstract: A system and method is disclosed for engine starting and transmission shifting where a controller may be operable to decrease a torque of a motor and operate a starter-generator (ISG) to start an engine responsive to a command to shift the transmission and start the engine. The controller may disengage a second clutch and subsequently shift the transmission to a target gear ratio speed responsive to the torque of the motor achieving zero. The controller may increase respective torques of the motor, ISG, and engine to drive a speed of the motor, ISG, and engine toward a target speed defined by the target gear speed responsive to completion of the shift. The controller may engage the second clutch responsive to the speed of the motor achieving the target speed and engage a disconnect clutch responsive to the respective speeds of the ISG and engine achieving the target speed.Type: ApplicationFiled: May 30, 2019Publication date: December 3, 2020Inventors: Jason MEYER, Dushyant PALEJIYA, Rajit JOHRI, Yixin YAO
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Patent number: 10829114Abstract: A system, comprising a computer that includes a processor and a memory, the memory storing instructions executable by the processor to track a target in lidar point cloud data by minimizing an error function based on a smoothed target position, a smoothed target velocity, a smoothed target acceleration and a measured target position. The processor can be further programmed to operate a vehicle based on tracking the target.Type: GrantFiled: February 6, 2019Date of Patent: November 10, 2020Assignee: Ford Global Technologies, LLCInventors: Yixin Yao, Mark Steven Yamazaki, Yucong Lin
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Publication number: 20200299783Abstract: Provided herein is a molecular signature that delineates response to ibrutinib and its use in predicting responsiveness to ibrutinib for lymphoma patients, and in particular for mantle cell lymphoma patients. Also provided are methods of treating a patient that is predicted to be ibrutinib-resistant with an inhibitor of oxidative phosphorylation, a BH3-mimetic, a noncovalent BTK inhibitor, or a CAR-T therapy.Type: ApplicationFiled: March 17, 2020Publication date: September 24, 2020Inventors: Michael WANG, Linghua WANG, Shaojun ZHANG, Liang ZHANG, Krystle NOMIE, Makhdum AHMED, Yixin YAO
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Publication number: 20200247401Abstract: A system, comprising a computer that includes a processor and a memory, the memory storing instructions executable by the processor to track a target in lidar point cloud data by minimizing an error function based on a smoothed target position, a smoothed target velocity, a smoothed target acceleration and a measured target position. The processor can be further programmed to operate a vehicle based on tracking the target.Type: ApplicationFiled: February 6, 2019Publication date: August 6, 2020Applicant: Ford Global Technologies, LLCInventors: Yixin Yao, Mark Steven Yamazaki, Yucong Lin
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Patent number: 10723229Abstract: A vehicle includes an electric machine, friction brakes, and a controller. The electric machine is configured to recharge a battery during regenerative braking. The friction brakes are configured to apply torque to wheels of the vehicle to decelerate the vehicle. The controller is programmed to, responsive to an anti-lock braking event, adjust a regenerative braking torque of the electric machine based on a difference between a desired wheel slip ratio and an actual wheel slip ratio.Type: GrantFiled: March 15, 2019Date of Patent: July 28, 2020Assignee: Ford Global Technologies, LLCInventors: Yixin Yao, Yanan Zhao
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Patent number: 10422396Abstract: A brake system and a method of controlling a brake system. The method may include indirectly estimating an air gap between a brake friction member and a brake pad assembly based on a position signal from a position sensor that detects cycling of the friction brake and a further signal indicative of an amount of brake force used to engage the brake pad assembly with the brake friction member. The air gap may be adjusted when an estimated air gap differs from a desired air gap.Type: GrantFiled: April 11, 2017Date of Patent: September 24, 2019Assignee: Meritor Heavy Vehicle Braking Systems (UK) LimitedInventors: Yixin Yao, Prashant Narula
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Publication number: 20190184957Abstract: Examples of techniques for fault diagnosis for fault tolerant chassis architecture systems are disclosed. In one example implementation according to aspects of the present disclosure, a computer-implemented method includes receiving, by a processing device, a control variable for the system. The method further includes receiving, by the processing device, a measured variable for the system. The method further includes calculating, by the processing device, a residual based at least in part on the control variable and the measured variable. The method further includes performing, by the processing device, a fault diagnosis to detect a fault in the system based at least in part on the residual.Type: ApplicationFiled: December 15, 2017Publication date: June 20, 2019Inventors: Yixin Yao, Lance A. Smith, Leibing Yu