William H Wittig

US Patent:

6408234, Jun 18, 2002

Filed:

Sep 7, 2000

Appl. No.:

09/657200

Inventors:

William Henry Wittig - Saginaw MI

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

B62D 504

US Classification:

701 41, 180443

Abstract:

A method and apparatus for improving the return-to-center motion of a steering wheel ( ) wherein a determination of a first and a second value; secondly, derive a set of two values from the first value; thirdly, compute a third value from the set of two values and the first value according to a predetermined formula; and fourth, calculate a steering command using the third value and the second value for enhancing the return-to-center motion.

US Patent:

6547208, Apr 15, 2003

Filed:

Dec 27, 2000

Appl. No.:

09/748480

Inventors:

Paul E Arnold - Reese MI
William Henry Wittig - Saginaw MI

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

F16M 1100

US Classification:

248672, 310 42, 310 89, 310 91, 310326

Abstract:

A motor mounting assembly ( ) for attaching a motor ( ) to a housing ( ) is presented. The mounting assembly ( ) includes a pair of flanges ( ), one on the housing ( ) and one on the motor ( ). Each flange ( ) has a recess ( ) extending around its circumference. A hollow cover ( ) is inserted over the flanges ( ) and crimped into the recesses ( ) to fasten the cover ( ) and the motor ( ) to the housing ( ). The cover ( ) includes inner and outer shells ( ) separated by a viscoelastic adhesive ( ). A resilient damper ( ) is sandwiched between the housing flange ( ) and the motor flange ( ).

US Patent:

6941817, Sep 13, 2005

Filed:

Aug 26, 2003

Appl. No.:

10/648115

Inventors:

David E. King - Freeland MI, US
William Henry Wittig - Saginaw MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

F16B031/02

US Classification:

73761

Abstract:

A delashing assembly includes a tightening device for tightening a nut in relation to a main shaft supported on bearings and a wireless interface, wherein torque information is received by the tightening device over the wireless interface. A main shaft and main nut assembly, as well as a steering system, may include the delashing assembly. A method of delashing the main shaft and main nut assembly includes providing a tightening device on a first end of the main shaft and sending torque information from a second end of the main shaft to the tightening device over the wireless interface.

US Patent:

7132811, Nov 7, 2006

Filed:

Mar 27, 2006

Appl. No.:

11/390330

Inventors:

Gregory Katch - Linden MI, US
William Wittig - Saginaw MI, US
Kathryn Pattok - Frankenmuth MI, US
Julie Kleinau - Bay City MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

H02P 7/00

US Classification:

318432, 318434, 323274, 323284

Abstract:

An electric power steering control system comprising: an electric motor disposed in a vehicle to apply torque to a steerable wheel; a torque sensor disposed in the vehicle for detecting a steering wheel torque and generating a torque signal indicative thereof; a vehicle speed sensor, the vehicle speed sensor generating a vehicle speed signal; a controller coupled to the torque sensor, the vehicle speed sensor and the electric motor. The controller generates a scheduled compensated torque command to the electric motor. The scheduled compensated torque command is based on at least one of: a torque command signal responsive to the torque signal; a compensated torque command signal; and a blend of the torque command signal and the compensated torque command signal. At least one of the torque command signal, the compensated torque command signal and the blend is based the vehicle speed signal.

US Patent:

7549504, Jun 23, 2009

Filed:

Jul 28, 2006

Appl. No.:

11/495219

Inventors:

Geoff P. Krieger - Bay City MI, US
William H. Wittig - Saginaw MI, US

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

B62D 5/04

US Classification:

180444, 180446, 701 41, 701 42

Abstract:

An electric power steering system includes a steering wheel, an electric assist motor operatively coupled to the steering wheel, and an electronic controller operatively coupled to the motor for receiving a first signal representative of torque applied to the steering wheel, and a second signal representative of angular velocity of the motor. The electronic controller produces an active damping motor command signal according to a function of the first and second signals. The active damping motor command signal is scaled by a first factor if the first and second signals are both positive, or if the first and second signals are both negative, to provide a scaled motor command signal. The active damping motor command signal is scaled by a second factor if the first signal is positive and the second signal is negative, or if the first signal is negative and the second signal is positive, to provide the scaled motor command signal. The scaled motor command signal is applied to the motor.

US Patent:

7950274, May 31, 2011

Filed:

Apr 23, 2008

Appl. No.:

12/107809

Inventors:

Kathryn L. Pattok - Frankenmuth MI, US
Geoff P. Krieger - Bay City MI, US
Tony Dodak - Frankenmuth MI, US
William H. Wittig - Saginaw MI, US
Steve R. Bannister - Bay City MI, US

International Classification:

G01M 17/06

US Classification:

7311702

Abstract:

A method for determining an absolute rotational position of a vehicle steering column is provided. In one exemplary embodiment, the method determines a relative position of a steering assist motor utilizing a relative position sensor. Thereafter, the method determines the absolute rotational position of the vehicle steering column based upon the relative position of the steering assist motor.

US Patent:

8082078, Dec 20, 2011

Filed:

Apr 8, 2008

Appl. No.:

12/099470

Inventors:

William H. Wittig - Saginaw MI, US

International Classification:

B62D 5/04
B62D 1/04

US Classification:

701 41, 180446

Abstract:

Methods, systems, and computer program products for steering travel limit determination for electric power steering. Exemplary embodiments include a method, computer program product and system incorporating the method, for implementing steering travel limit determination for electric power steering, including measuring end of travel positions of a handwheel of a vehicle, recording the end of travel positions, comparing the end of travel positions with current travel limit values and recording new travel limits with respect to the end of travel positions.

US Patent:

8116944, Feb 14, 2012

Filed:

Apr 28, 2008

Appl. No.:

12/110670

Inventors:

Michael K. Hales - Midland MI, US
William H. Wittig - Saginaw MI, US
Anthony J. Champagne - Saginaw MI, US

International Classification:

G06F 19/00

US Classification:

701 41, 701 42, 701 44

Abstract:

A method for controlling a steering system, the method including, receiving a first signal including a position of a component in the steering system, receiving a second signal including a disturbance signal operative to indicate an effect of a first torque disturbance in the steering system, calculating a first counter acting torque command signal operative to minimize the first torque disturbance as a function of the position of the component and the disturbance signal, and sending the first counter acting torque command signal to a motor.