Patents by Inventor Werner Zaehner

Werner Zaehner 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 and device for monitoring a humidity sensor in a combustion engine, using oxygen measurement of other sensors in the engine, such as NOx, lambda and/or oxygen sensors
    Patent number: 9772273
    Abstract: The present invention provides for a method and device for monitoring an ambient humidity sensor in a combustion engine, where the monitoring of the ambient humidity sensor is made by comparing the ambient humidity measured by said humidity sensor and an ambient humidity determined from an oxygen measurement of at least another sensor in the engine system, such as a NOX, or Lambda and/or an oxygen sensor. Said comparison is made using an offset of the oxygen signal reading of said at least another sensor, in a fuel cut condition where the drift or offset of said another sensor is related to the variation of the ambient humidity.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: September 26, 2017
    Assignee: FPT MOTORENFORSCHUNG AG
    Inventors: Theophil Auckenthaler, Werner Zaehner
  • METHOD AND DEVICE FOR MONITORING A HUMIDITY SENSOR IN A COMBUSTION ENGINE, USING OXYGEN MEASUREMENT OF OTHER SENSORS IN THE ENGINE, SUCH AS NOX, LAMBDA AND/OR OXYGEN SENSORS
    Publication number: 20130118232
    Abstract: The present invention provides for a method and device for monitoring an ambient humidity sensor in a combustion engine, where the monitoring of the ambient humidity sensor is made by comparing the ambient humidity measured by said humidity sensor and an ambient humidity determined from an oxygen measurement of at least another sensor in the engine system, such as a NOX, or Lambda and/or an oxygen sensor. Said comparison is made using an offset of the oxygen signal reading of said at least another sensor, in a fuel cut condition where the drift or offset of said another sensor is related to the variation of the ambient humidity.
    Type: Application
    Filed: May 5, 2011
    Publication date: May 16, 2013
    Applicant: FPT MOTORENFORSCHLUNG AG
    Inventors: Theophil Auckenthaler, Werner Zaehner
  • Turbocompound internal combustion engine
    Patent number: 6681575
    Abstract: A turbocompound internal combustion engine having a turbocharger with a variable-geometry turbine; and an auxiliary turbine, which is located downstream from the turbine of the turbocharger, provides for recovering energy from the exhaust gas, and is connected mechanically to the drive shaft of the engine via a transmission; a control device compares the rotation speed of the auxiliary turbine, detected by means of a sensor, with a range of permissible speeds calculated on the basis of the speed of the drive shaft, and controls fuel supply to the engine and the geometry of the variable-geometry turbine to maintain the speed of the auxiliary turbine within predetermined limits in the event of a fault on the transmission.
    Type: Grant
    Filed: October 5, 2001
    Date of Patent: January 27, 2004
    Assignees: IVECO FIAT S.p.A., IVECO Motorenforschung AG
    Inventors: Giancarlo Dellora, Werner Zaehner
  • Control system for a variable-geometry turbocharger
    Patent number: 6523345
    Abstract: A control system for a variable-geometry turbocharger connected to an internal combustion engine, whereby the geometry of the turbocharger is controlled alternatively according to a first operating mode, a second operating mode or a third operating mode; the system providing for switching from one operating mode to another fully automatically.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: February 25, 2003
    Assignee: Iveco Notorenforschung AG
    Inventors: Guenther Scherngell, Werner Zaehner, Juerg Spuler
  • Control system for a variable-geometry turbocharger
    Publication number: 20020157395
    Abstract: A control system for a variable-geometry turbocharger connected to an internal combustion engine, whereby the geometry of the turbocharger is controlled alternatively according to a first operating mode, a second operating mode or a third operating mode; the system providing for switching from one operating mode to another fully automatically.
    Type: Application
    Filed: December 28, 2001
    Publication date: October 31, 2002
    Inventors: Guenther Scherngell, Werner Zaehner, Juerg Spuler
  • Turbocompound internal combustion engine
    Publication number: 20020062646
    Abstract: A turbocompound internal combustion engine having a turbocharger with a variable-geometry turbine; and an auxiliary turbine, which is located downstream from the turbine of the turbocharger, provides for recovering energy from the exhaust gas, and is connected mechanically to the drive shaft of the engine via a transmission; a control device compares the rotation speed of the auxiliary turbine, detected by means of a sensor, with a range of permissible speeds calculated on the basis of the speed of the drive shaft, and controls fuel supply to the engine and the geometry of the variable-geometry turbine to maintain the speed of the auxiliary turbine within predetermined limits in the event of a fault on the transmission.
    Type: Application
    Filed: October 5, 2001
    Publication date: May 30, 2002
    Inventors: Giancarlo Dellora, Werner Zaehner