Patents by Inventor STEVEN T. SCHWEITZER

STEVEN T. SCHWEITZER 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).

  • Patent number: 10344844
    Abstract: A system and method for electronically controlling a limited slip differential is disclosed. The method includes determining, by an electronic controller of a vehicle, a request for a limited-slip-differential coupling torque to be applied. The request is based upon an estimation of the vehicle's mass. The method also includes transmitting the request to an electronic limited slip differential of the vehicle. The electronic limited slip differential is configured to apply the requested limited-slip-differential coupling torque.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: July 9, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: James R. Walter, Jason Matthew Kolk, Satish Sundaram, Steven T. Schweitzer
  • Publication number: 20180340600
    Abstract: A system and method for electronically controlling a limited slip differential is disclosed. The method includes determining, by an electronic controller of a vehicle, a request for a limited-slip-differential coupling torque to be applied. The request is based upon an estimation of the vehicle's mass. The method also includes transmitting the request to an electronic limited slip differential of the vehicle. The electronic limited slip differential is configured to apply the requested limited-slip-differential coupling torque.
    Type: Application
    Filed: May 24, 2017
    Publication date: November 29, 2018
    Inventors: James R. Walter, Jason Matthew Kolk, Satish Sundaram, Steven T. Schweitzer
  • Patent number: 10131360
    Abstract: Methods and systems are provided for determining a road surface friction coefficient and controlling a feature of the vehicle based thereon. In one embodiment, a method includes: receiving signals from an electronic power steering system and an inertial measurement unit; estimating parameters associated with an electronic power steering system model using an iterative optimization method; calculating an electronic power steering system variable using the electronic power steering system model, the estimated parameters and one or more of the received signals; determining whether the calculated electronic power steering system variable satisfies a fitness criterion; and when the calculated electronic power steering system variable does satisfy the fitness criterion, determining a road surface friction coefficient based on at least one of the estimated parameters.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: November 20, 2018
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Yadollah Sabri, Simon E. Zimmerman, Yingmei Si, Steven T. Schweitzer, Qingrong Zhao, Qi Zhang, Nikolai K. Moshchuk
  • Publication number: 20180043900
    Abstract: Methods and systems are provided for determining a road surface friction coefficient and controlling a feature of the vehicle based thereon. In one embodiment, a method includes: receiving signals from an electronic power steering system and an inertial measurement unit; estimating parameters associated with an electronic power steering system model using an iterative optimization method; calculating an electronic power steering system variable using the electronic power steering system model, the estimated parameters and one or more of the received signals; determining whether the calculated electronic power steering system variable satisfies a fitness criterion; and when the calculated electronic power steering system variable does satisfy the fitness criterion, determining a road surface friction coefficient based on at least one of the estimated parameters.
    Type: Application
    Filed: August 12, 2016
    Publication date: February 15, 2018
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: YADOLLAH SABRI, SIMON E. ZIMMERMAN, YINGMEI SI, STEVEN T. SCHWEITZER, QINGRONG ZHAO, QI ZHANG, NIKOLAI K. MOSHCHUK