Patents by Inventor Achim Tegen

Achim Tegen 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).

  • Method for controlling an automatic vehicle transmission in order to reduce back-and-forth shifting
    Patent number: 8047091
    Abstract: A method of controlling an automatic transmission of a motor vehicle having clutches controlled by an electronic control unit. A transmission rotational speed in an initial transmission stage is determined. If a first transmission shifting rotational speed is reached, the transmission is shifted from the initial transmission stage to a target transmission stage. A target transmission rotational speed of the target transmission stage is then ascertained. A difference is next ascertained between the target transmission rotational speed and a second shifting transmission rotational speed. An initial counter value, of a counter, is determined, which depends on the transmission rotational speed difference. The counter is next caused to carry out counting, from the initial counter value, as time progresses. If and when the counter value reaches zero, the transmission is shifted from the target transmission stage toward the initial transmission stage.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: November 1, 2011
    Assignee: ZF Friedrichshafen AG
    Inventors: Werner Wolfgang, Maik Würthner, Ingo Sauter, Achim Tegen
  • Method for Controlling an Automatic Vehicle Transmission in Order to Reduce Back-and-Forth Shifting
    Publication number: 20080274857
    Abstract: A method of controlling an automatic transmission of a motor vehicle having clutches controlled by an electronic control unit. A transmission rotational speed in an initial transmission stage is determined. If a first transmission shifting rotational speed is reached, the transmission is shifted from the initial transmission stage to a target transmission stage. A target transmission rotational speed of the target transmission stage is then ascertained. A difference is next ascertained between the target transmission rotational speed and a second shifting transmission rotational speed. An initial counter value, of a counter, is determined, which depends on the transmission rotational speed difference. The counter is next caused to carry out counting, from the initial counter value, as time progresses. If and when the counter value reaches zero, the transmission is shifted from the target transmission stage toward the initial transmission stage.
    Type: Application
    Filed: February 1, 2006
    Publication date: November 6, 2008
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Werner Wolfgang, Maik Wurthner, Ingo Sauter, Achim Tegen