Patents by Inventor William Chin-Woei Lin
William Chin-Woei Lin 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: 10183656Abstract: A road slope estimation system providing road grade information for vehicle automatic parking assist system includes synchronized filters for processing vehicle speed differentiation to obtain vehicle acceleration to be compared with chassis accelerometer signal. Road grade information is extracted based on the comparison of the two signals. The system includes a dynamic compensator module to minimize the chassis accelerometer signal disturbance caused by chassis dynamic response to vehicle motion. The system further includes a predictive filter to obtain the steady-state filter result during the filter transient stage.Type: GrantFiled: February 5, 2017Date of Patent: January 22, 2019Inventors: William Chin-Woei Lin, Yixin Chen, Ke Ding, Xiao He
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Publication number: 20180222456Abstract: A road slope estimation system providing road grade information for vehicle automatic parking assist system includes synchronized filters for processing vehicle speed differentiation to obtain vehicle acceleration to be compared with chassis accelerometer signal. Road grade information is extracted based on the comparison of the two signals. The system includes a dynamic compensator module to minimize the chassis accelerometer signal disturbance caused by chassis dynamic response to vehicle motion. The system further includes a predictive filter to obtain the steady-state filter result during the filter transient stage.Type: ApplicationFiled: February 5, 2017Publication date: August 9, 2018Applicant: Changan US R&D Center, Inc.Inventors: William Chin-Woei Lin, Yixin Chen, Ke Ding, Xiao He
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Patent number: 8928266Abstract: An electric drive system includes a motor output shaft rotating on a motor axis and a first electric motor. The system includes an epicyclical gear that includes a sun gear, a ring gear, a plurality of planet gears and a carrier. The sun gear, the ring gear and the carrier gear of the epicyclical gear all rotate on the motor axis, and the carrier gear is connected to the motor output shaft via a first flange. The system also includes a second electric motor interposed between the first electric motor and the epicyclical gear. The second motor shaft has a hollow center along the motor axis and the first motor shaft extends through the hollow center of the second motor shaft and is connected to the sun gear. The system also includes a second flange. The second flange connects the second motor shaft to the carrier. The first flange and the second flange are located at opposite sides of the epicyclical gear.Type: GrantFiled: September 29, 2013Date of Patent: January 6, 2015Inventor: William Chin-Woei Lin
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Publication number: 20110246006Abstract: An electric propulsion system for a vehicle includes an electric motor operatively connected to a wheel of the vehicle. The system includes a first energy storage electrically connected to the electric motor to provide electric energy to the electric motor. The first energy storage is characterized by a first energy capacity and a first power capacity. The system includes a second energy storage characterized by a second energy capacity and a second power capacity. The second energy capacity is less than the first energy capacity and the second power capacity is greater than the first power capacity. The system includes a control module that detects a request of power for the vehicle and electrically connects the second energy storage to the electric motor to provide electric power based on the request.Type: ApplicationFiled: April 2, 2010Publication date: October 6, 2011Inventors: Ching-Li Jimmy Wong, Su-Chee Simon Wang, William Chin-Woei Lin
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Patent number: 6965820Abstract: A controller (32) for a vehicular system (10) that includes a hand-wheel (16) and an electric motor (34) includes a torque-assist function (56) responsive to a signal representing the torque applied to the hand-wheel (16) for providing a torque-assist command to the motor (34), and a steering-pull compensator (52) responsive to a signal representing a valid ignition cycle for modifying the torque-assist command to the motor (34) by an offset corresponding to a detected steering-pull condition; where the method of control includes receiving the signal indicative of the torque applied to the hand-wheel (16), providing a torque-assist command to the motor (34) in response to the received torque signal, detecting an enabling signal related to the signal representing a valid ignition cycle, quantifying a steering-pull condition in response to the received and detected signals, and modifying the torque-assist command to the motor (34) by an offset corresponding to the quantified steering-pull condition.Type: GrantFiled: September 18, 2001Date of Patent: November 15, 2005Assignee: Delphi Technologies, Inc.Inventors: Sanket S. Amberkar, Ashok Chandy, Kathryn L. Pattok, Mark P. Colosky, William Chin-Woei Lin, Weiwen Deng, Yuen-Kwok Chin
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Patent number: 6580988Abstract: A method is disclosed for controlling the rear wheel angle in a four-wheel steering vehicle such as a pickup truck. The front wheels are steered using the conventional operator handwheel linked to the front wheels. The rear wheels are actuated with a reversible electric motor and the rear wheel angle controlled using a computer with inputs of vehicle velocity, operator handwheel position and correlated front wheel angle, and handwheel turning rate. Control of rear wheel angle starts with a correlation of ratios of rear wheel angle to front wheel angle, R/F, vs. vehicle velocity suitable, determined under steady state front steering angle and velocity conditions, to maximize the contribution of the rear wheels while avoiding side-slip of the vehicle.Type: GrantFiled: November 6, 2001Date of Patent: June 17, 2003Assignee: General Motors CorporationInventors: William Chin-Woei Lin, Yuen-Kwok Chin, Weiwen Deng, Scott P. Sherman, Paul A. Grougan, Eugene A. Rodden
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Publication number: 20030088350Abstract: A method is disclosed for controlling the rear wheel angle in a four-wheel steering vehicle such as a pickup truck. The front wheels are steered using the conventional operator handwheel linked to the front wheels. The rear wheels are actuated with a reversible electric motor and the rear wheel angle controlled using a computer with inputs of vehicle velocity, operator handwheel position and correlated front wheel angle, and handwheel turning rate. Control of rear wheel angle starts with a correlation of ratios of rear wheel angle to front wheel angle, R/F, vs. vehicle velocity suitable, determined under steady state front steering angle and velocity conditions, to maximize the contribution of the rear wheels while avoiding side-slip of the vehicle.Type: ApplicationFiled: November 6, 2001Publication date: May 8, 2003Inventors: William Chin-Woei Lin, Yuen-Kwok Chin, Weiwen Deng, Scott P. Sherman, Paul A. Grougan, Eugene A. Rodden
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Patent number: 6560524Abstract: There is disclosed a method for integrating a vehicle stability enhancement system and rear wheel steering. The method includes inputting a vehicle speed and measured vehicle yaw rates. Determining a front and rear wheel steer angle. Calculating a desired yaw rate. Comparing the measured yaw rate with the desired yaw rate to determine a yaw error term. Applying a braking force to a wheel of a vehicle imparting a yaw moment based upon the magnitude of the error term calculated. The rear wheel steer angle is taken into account in calculating a desired yaw rate.Type: GrantFiled: September 26, 2001Date of Patent: May 6, 2003Assignee: General Motors CorporationInventors: William Chin-Woei Lin, Yuen-Kwok Chin, David Michael Sidlosky, David S. Rule, Weiwen Deng
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Publication number: 20030060959Abstract: There is disclosed a method for integrating a vehicle stability enhancement system and rear wheel steering. The method includes inputting a vehicle speed and measured vehicle yaw rates. Determining a front and rear wheel steer angle. Calculating a desired yaw rate. Comparing the measured yaw rate with the desired yaw rate to determine a yaw error term. Applying a braking force to a wheel of a vehicle imparting a yaw moment based upon the magnitude of the error term calculated. The rear wheel steer angle is taken into account in calculating a desired yaw rate.Type: ApplicationFiled: September 26, 2001Publication date: March 27, 2003Inventors: William Chin-Woei Lin, Yuen-Kwok Chin, David Michael Sidlosky, David S. Rule, WEIWEN DENG
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Patent number: 6292094Abstract: A method is disclosed for controlling a backing maneuver of an automotive vehicle and trailer combination in which the vehicle has operator-actuated front wheel steering and microprocessor-actuated, reversible electric motor driven rear wheel steering. For a given initial alignment of vehicle and trailer, the computer-executed method first determines whether the driver needs to pull forward before commencing the backing operation. The driver is then requested to turn the front wheels in a direction suitable for backing the vehicle without a trailer in the desired direction. The process then determines whether the driver needs to perform counter front wheel steering before backing. Then the process controls the steering of the rear wheels during the backing operation.Type: GrantFiled: January 16, 2001Date of Patent: September 18, 2001Assignee: General Motors CorporationInventors: Weiwen Deng, Yuen-Kwok Chin, William Chin-Woei Lin, David S. Rule, Yong Han Lee
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Patent number: 6205391Abstract: An improved vehicle yaw control that does not require a yaw sensor, wherein the validity of an estimate of vehicle yaw is determined and used to select an appropriate control methodology. The vehicle yaw is estimated based on the measured speeds of the un-driven wheels of the vehicle, and various other conditions are utilized to determine if the estimated yaw rate is valid for control purposes. When it is determined that the estimated yaw rate is valid, a closed-loop yaw rate feedback control strategy is employed, whereas in conditions under which it is determined that the estimated yaw rate is not valid, a different control strategy, such as an open-loop feed-forward control of vehicle yaw, is employed. The validity of the estimated yaw rate is judged based on a logical analysis of the measured wheel speed information, braking information, and steering wheel angle. The measured speeds of the un-driven wheels are used to compute an average un-driven wheel speed and an average un-driven wheel acceleration.Type: GrantFiled: May 18, 1998Date of Patent: March 20, 2001Assignees: General Motors Corporation, Delphi Technologies Inc.Inventors: Youssef Ahmed Ghoneim, David Michael Sidlosky, William Chin-Woei Lin
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Patent number: 6175790Abstract: An improved closed-loop vehicle yaw control in which a yaw rate limit based on measured lateral acceleration is used during transient steering maneuvers to dynamically limit a desired yaw rate derived from driver steering input. A preliminary yaw rate limit is computed based on the measured lateral acceleration, and a dynamic yaw rate limit having a proper phase relationship with the desired yaw rate is developed based on the relative magnitudes of the desired yaw rate and the preliminary yaw rate limit. A two-stage process is used to develop the dynamic yaw rate limit. A first stage yaw rate limit is determined according the lower in magnitude of the desired yaw rate and the preliminary yaw rate limit, and a second stage yaw rate limit (i.e., the dynamic yaw rate limit) is determined according to the relative magnitudes of (1) the desired yaw rate and the second stage yaw rate limit, and (2) the first stage yaw rate limit and the second stage yaw rate limit.Type: GrantFiled: August 24, 1998Date of Patent: January 16, 2001Assignees: General Motors Corporation, Delphi Technologies IncInventors: William Chin-Woei Lin, Youssef Ahmed Ghoneim, David Michael Sidlosky, Hsien Heng Chen, Yuen-Kwok Chin
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Patent number: 6122584Abstract: A brake system control method, comprising the steps of: measuring a longitudinal speed and steering angle of the vehicle; specifying an un-damped natural frequency and a damping ratio for a linear reference model of said vehicle; determining a first gain parameter relating a desired value of steady state lateral velocity to the vehicle steering angle; computing a desired lateral velocity as a function of said first gain parameter, the measured longitudinal speed, the measured steering angle, and the specified un-damped natural frequency and damping ratio; determining a second gain parameter relating a desired value of steady state yaw rate to the vehicle steering angle; computing a desired yaw rate as a function of said second gain parameter, the measured longitudinal speed and steering angle, and the specified un-damped natural frequency and damping ratio; measuring a lateral acceleration and yaw rate of said vehicle, and forming a yaw rate command for said vehicle based at least part in a first deviation beType: GrantFiled: February 22, 1999Date of Patent: September 19, 2000Assignee: General Motors CorporationInventors: William Chin-Woei Lin, Youssef Ahmed Ghoneim, Hsien Heng Chen, Yuen-Kwok Chin, David Michael Sidlosky
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Patent number: 6079800Abstract: An improved active brake control for carrying out a desired wheel speed differential for enhanced vehicle lateral stability while maintaining suitable front-to-rear brake pressure proportioning. During driver braking, the target speeds for the wheels of the driven axle during active brake control are determined as a combined function of the wheel speeds of the un-driven axle and the desired wheel speed differential. Specifically, the target speeds for the driven wheels are determined according to the measured speeds of the corresponding un-driven wheels, and one of the target speeds is reduced to reflect the desired wheel speed differential. If the desired wheel speed differential is designed to produce a clockwise yaw moment, the target speed for the driven wheel on the right-hand side of the vehicle is reduced; if the differential is designed to produce a counter-clockwise yaw moment, the target speed for the driven wheel on the left-hand side of the vehicle is reduced.Type: GrantFiled: August 20, 1998Date of Patent: June 27, 2000Assignee: General Motors CorporationInventors: William Chin-Woei Lin, Youssef Ahmed Ghoneim, David Michael Sidlosky, Yuen-Kwok Chin
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Patent number: 6062336Abstract: An adaptive, variable effort power steering system is responsive signals from one or more low friction road surface vehicle handling controls which indicate when the system has become active in modifying handling, and thus indicates the existence of a near limit or at limit vehicle handling situation. Such controls include anti-lock braking systems (ABS), traction control systems (TCS) and integrated chassis control systems (ICCS). When such a handling limit signal is received, the power steering system responds by decreasing steering assist to provide a more "manual" steering feel as long as the handling limit situation is indicated. The handling limit signal may be a binary signal, indicating activity or no activity of an anti-lock brake system, traction control system or a chassis control system such a yaw rate control.Type: GrantFiled: November 13, 1998Date of Patent: May 16, 2000Assignee: General Motors CorporationInventors: Sanket Suresh Amberkar, Yuen-Kwok Chin, William Chin-Woei Lin, Jeffery Alan Zuraski
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Patent number: 6056371Abstract: An improved active brake control in which differential braking is used in a feed-forward control to develop vehicle yaw in response to a desired yaw value determined as a function of steering wheel position and vehicle speed. The desired yaw rate value is used to develop a derivative yaw component and a proportional yaw component, which are summed to form a feed-forward yaw command for differential braking. Both proportional and derivative components have limited control authority determined by dead-band and saturation thresholds, and the proportional term is subjected to a diminishing integrator which reduces the yaw command as the desired yaw rate value approaches steady-state.Type: GrantFiled: August 24, 1998Date of Patent: May 2, 2000Assignee: General Motors CorporationInventors: William Chin-Woei Lin, Youssef Ahmed Ghoneim, David Michael Sidlosky, Yuen-Kwok Chin, Cheng-Foo Chen
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Patent number: 6035251Abstract: A brake system control for use in a vehicle with wheels, wheel brakes and a body, comprising the steps of: measuring a plurality of vehicle parameters; responsive to the measured parameters, determining at least a vehicle yaw rate, a vehicle slip angle, a desired yaw rate and a desired slip angle; responsive to the measured parameters, estimating a coefficient of adhesion between the vehicle wheels and a road surface; implementing a control responsive to the vehicle yaw rate and the desired yaw rate with a first authority and responsive to the vehicle slip angle and the desired slip angle with a second authority, wherein the first authority increases as the estimated coefficient of adhesion increases and decreases as the estimated coefficient of adhesion decreases; and controlling the wheel brakes responsive to the control to reduce a first difference between the vehicle yaw rate and the desired yaw rate and to reduce a second difference between the vehicle slip angle and the desired slip angle.Type: GrantFiled: November 10, 1997Date of Patent: March 7, 2000Assignee: General Motors CorporationInventors: Aleksander Boguslaw Hac, John Francis Hoying, Rowland Curl Augustus, Joachim Busshardt, Sean Padraig O'Connell, William Chin-Woei Lin, Youssef Ahmed Ghoneim, Hsien Heng Chen, David Michael Sidlosky, Yuen-Kwok Chin, David John Barta
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Patent number: 5941919Abstract: In a vehicle with a first operating mode in which all vehicle wheels have substantially no lateral movement on a road surface and a second operating mode in which at least some of the vehicle wheels have lateral movement on the road surface, and with an actuator capable of affecting vehicle yaw rate, a vehicle yaw rate control method comprising the steps of: measuring an actual vehicle yaw rate; measuring vehicle steering wheel position; in the second mode of operation, determining a desired yaw rate command linearly responsive to the measured steering wheel position; wherein the actuator is controlled to minimize a difference between the measured vehicle yaw rate and the desired vehicle yaw rate.Type: GrantFiled: October 16, 1996Date of Patent: August 24, 1999Assignee: General Motors CorporationInventors: Stephen Robert Pastor, Ronald Paul, Michael Douglas Rizzo, Edward John Bedner, Vivek Jaikamal, Kevin Austin O'Dea, Edmund Stanley Browalski, Howard Hans Ludwig, Scott Douglas Morrison, Hsien Heng Chen, Yuen-Kwok Chin, Youssef Ahmed Ghoneim, William Chin-Woei Lin, Mutasim Abdurrahman Salman, David Michael Sidlosky, Michael Paul Turski
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Patent number: 5746486Abstract: A brake control system method according to the steps of: determining driver commanded yaw rate; measuring actual yaw rate; determining a yaw rate error; determining, in response to vehicle conditions, a yaw rate dead band wherein the yaw rate dead band varies with vehicle conditions; comparing the yaw rate error to the dead band; and if the yaw rate error exceeds the dead band, controlling the vehicle responsive to the yaw rate error, wherein yaw rate control only occurs when the yaw rate error exceeds the dead band.Type: GrantFiled: August 29, 1997Date of Patent: May 5, 1998Assignee: General Motors CorporationInventors: Ronald Paul, Stephen Robert Pastor, Michael Douglas Rizzo, Duane Edward Bassett, Edward John Bedner, Douglass L. Carson, Hsien Heng Chen, Yuen-Kwok Chin, Youssef Ahmed Ghoneim, Alan James Lee, William Chin-Woei Lin, Howard Hans Ludwig
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Patent number: 5720533Abstract: In a vehicle with first and second front vehicle wheels and third and fourth rear vehicle wheels and at least one member of a first group comprising anti-lock brake control and positive acceleration traction control, a brake control method comprising the steps of: determining a desired vehicle yaw rate; determining an actual vehicle yaw rate; responsive to the desired and actual vehicle yaw rates, determining an axle command; responsive to the desired and actual vehicle yaw rates, determining a torque command; applying the axle command during activation of one of the anti-lock brake control and the positive acceleration traction control to one member of a second group comprising (i) the two front wheels and (ii) the two rear wheels, wherein wheel-to-road traction is increased and a difference between desired vehicle yaw rate and actual vehicle yaw rate is minimized; and applying the torque command to at least one of the vehicle wheels independently of the axle command to create a yaw torque moment on the vehiType: GrantFiled: October 15, 1996Date of Patent: February 24, 1998Assignee: General Motors CorporationInventors: Stephen Robert Pastor, William Chin-Woei Lin, Michael Douglas Rizzo, Duane Edward Bassett, Edward John Bedner, Edmund Stanley Browalski, Douglass L. Carson, Hsien Heng Chen, Yuen-Kwok Chin, Youssef Ahmed Ghoneim, Hong Xing Hu, Vivek Jaikamal, Ronald Paul, Steven Lee Tracht, Michael Paul Turski