Houchun A Xia

8326482, Dec 4, 2012

Oct 23, 2009

12/604725

Houchun Xia - Troy MI, US

G01M 17/00
G06F 19/00
G06F 7/00

701 337, 701 334

A system and method for monitoring the stability of a hybrid powertrain system includes monitoring the system and its subsystems output response signals to its inputs to identify the system operating status. For example, for a hybrid powertrain system equipped with an electrically variable transmission (EVT), three signals are monitored. They are the two electrical motor speeds representing the direct subsystem response to their feedback control inputs and the EVT output speed representing the entire system's response. A stability monitoring system includes a mean determination module that determines a mean signal of the signals and an oscillation determination module that determines a signal oscillation signal based on the instant signal and the mean signal. The monitoring system also includes a signal mean crossing determination module that determines the signal crossing its mean signal and the oscillation peak detection, storage and comparison modules that determines system instability indicators for the control system to take corrective actions.

8412398, Apr 2, 2013

Mar 21, 2011

13/052314

Houchun Xia - Troy MI, US
Robert L. Morris - Milford MI, US

GM Global Technology Operations LLC - Detroit MI

B60L 9/00
G06F 7/00

701 22, 701 58

An example vehicle includes a motor and a gearbox. A controller is configured to identify oscillation peaks of a performance signal representing the rotational speed of the motor, the input speed of the gearbox, or the amount of torque generated by the motor or provided to the gearbox. The controller is configured to simultaneously detect unstable regular and irregular oscillations of the performance signal given the oscillation peaks identified and substantially dampen the unstable oscillations detected. An example method may include determining a mean of the performance signal and defining peak values, including peak moving average values or filtered peak values, representing a magnitude of at least two oscillation peaks. The method further includes simultaneously detecting the unstable regular and irregular oscillations of the performance signal using the defined values and substantially dampening the unstable oscillations.

8560154, Oct 15, 2013

Mar 3, 2011

13/039345

R. Anthony Hansen - Redford MI, US
Steven M. Hessell - Clarkston MI, US
Gil J. Mendoza - Novi MI, US
Robert L. Morris - Milford MI, US
Houchun Xia - Troy MI, US

GM Global Technology Operations LLC - Detroit MI

B60L 9/00
B60L 11/00
G05D 1/00
G05D 3/00
G06F 7/00
G06F 17/00

701 22

A method for optimizing torque control in a vehicle having a controller and a rotating member includes generating a closed-loop total proportional torque command using a state space feedback portion of the controller, and splitting the total proportional torque command into high-frequency and low-frequency proportional torque components. A total proportional torque is passed to the rotating member to provide driveline damping control when speed control is not required. The high-frequency proportional torque component is passed to the rotating member to provide driveline damping control, and the low-frequency torque component is passed with a total integral torque command to the rotating member to provide speed control, when speed control is required. A vehicle includes a controller having proportional-integral control capabilities and a state space observer, and a powertrain having a rotating member whose speed and damping characteristics are controlled by the controller.

20090078515, Mar 26, 2009

Sep 20, 2007

11/858596

Houchun Xia - Troy MI, US

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - Detroit MI

F16D 65/12

188218XL

One embodiment of the invention includes a method comprising: placing a first insert and a second insert in a casting mold and wherein the first insert and second insert comprising a plurality of connecting post extending inbetween so that the first insert and second insert are in spaced-apart relationship in the mold, each of the first insert and the second insert comprising a first material; casting a molten second material into the casting mold so that the second material flows between the first insert and the second insert and solidifying the second material to provide a product comprising a cast over body portion with the first insert and second insert and so that the second material is mechanically locked or metallurgically bonded to the first material and so that one or both of the first insert and the second insert provides working surface for the product.

20120277963, Nov 1, 2012

Apr 27, 2011

13/094946

Houchun Xia - Troy MI, US
Robert L. Morris - Milford MI, US

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

G06F 17/00

701 58

A method to predict a driveline lash condition includes monitoring an axle torque request signal, determining a predicted axle torque request value at a lead time based upon the monitored axle torque request signal, and predicting the driveline lash condition at the lead time based upon the predicted axle torque request value indicating an upcoming zero torque condition.

20120312647, Dec 13, 2012

Jun 12, 2012

13/494114

Houchun Xia - Troy MI, US

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

F16D 65/12
B22D 19/00

188218XL, 164108, 188218 R

One embodiment of the invention includes a method comprising: placing a first insert and a second insert in a casting mold and wherein the first insert and second insert comprising a plurality of connecting post extending inbetween so that the first insert and second insert are in spaced-apart relationship in the mold, each of the first insert and the second insert comprising a first material; casting a molten second material into the casting mold so that the second material flows between the first insert and the second insert and solidifying the second material to provide a product comprising a cast over body portion with the first insert and second insert and so that the second material is mechanically locked or metallurgically bonded to the first material and so that one or both of the first insert and the second insert provides working surface for the product.

20130332037, Dec 12, 2013

Jun 12, 2012

13/494072

Houchun Xia - Troy MI, US
Robert L. Morris - Milford MI, US
R. Anthony Hansen - Redford MI, US

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

G06F 7/00

701 58, 701 1

A method for controlling a multi-mode transmission system employing torque machines under dynamic operating conditions includes calculating a phase shift between a control parameter of one of the torque machines and a response parameter of the multi-mode transmission system under dynamic operating conditions, comparing the calculated phase shift and an expected phase shift, and executing remedial action when the calculated phase shift exceeds a threshold associated with the expected phase shift.

20210336462, Oct 28, 2021

Apr 27, 2020

16/859322

- Detroit MI, US
Houchun Xia - Troy MI, US
Justin Bunnell - Northville MI, US
Charles W. Wampler - Birmingham MI, US

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

H02J 7/00
G01R 31/389
G01R 31/3842
G01R 31/396
B60L 58/12
B60L 53/62
B60L 15/20

A method for estimating a state of a battery pack using a controller having battery state estimator (BSE) logic includes receiving or delivering a constant baseline current via the battery pack. Current oscillations having time-variant frequency content are selectively injected into the baseline current via the controller in response to a predetermined condition. The baseline current and the current oscillations combine to form a final current. The method includes estimating a battery parameter via the BSE logic concurrently with the current oscillations to generate an estimated battery parameter, and estimating the present state of the battery pack via the controller using the estimated battery parameter. An electrical system includes a rotary electric machine that is electrically connected to and driven by the battery pack, and a controller configured to execute the method.