Patents by Inventor Allen Joseph Lehmen

Allen Joseph Lehmen 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).

  • Diagnostic method for vehicle evaporative emissions
    Patent number: 6594562
    Abstract: A method of monitoring evaporative emissions of a vehicle includes the steps of establishing a baseline pressure within a vehicle evaporative emission system during the occurrence of a vehicle-off condition, detecting a change in the baseline pressure during the vehicle-off condition, and indicating whether the change in the baseline pressure is within a desirable limit.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: July 15, 2003
    Assignee: Ford Global Technologies, Inc.
    Inventors: Jeffrey Kaiser, Allen Joseph Lehmen, Timothy Gernant
  • Diagnostic method for vehicle evaporative emissions
    Publication number: 20020116102
    Abstract: A method of monitoring evaporative emissions of a vehicle includes the steps of establishing a baseline pressure within a vehicle evaporative emission system during the occurrence of a vehicle-off condition, detecting a change in the baseline pressure during the vehicle-off condition, and indicating whether the change in the baseline pressure is within a desirable limit.
    Type: Application
    Filed: December 7, 2000
    Publication date: August 22, 2002
    Inventors: Jeffrey Kaiser, Allen Joseph Lehmen, Timothy Gernant
  • Fuel weathering method for vehicle evaporative emission system
    Patent number: 6435164
    Abstract: A fuel weathering method for an evaporative emission system of a motor vehicle includes determining a current temperature of liquid fuel inside the evaporative emission system, determining a fuel residency time representing the amount of time the fuel has resided above the current temperature, and performing a system diagnostic test of the evaporative emission system only if the fuel residency time exceeds a minimum fuel residency time.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: August 20, 2002
    Assignee: Ford Global Technologies, Inc.
    Inventors: Jeffrey Kaiser, Allen Joseph Lehmen, Timothy Gernant
  • FUEL WEATHERING METHOD FOR VEHICLE EVAPORATIVE EMISSION SYSTEM
    Publication number: 20020104516
    Abstract: A fuel weathering method for an evaporative emission system of a motor vehicle includes determining a current temperature of liquid fuel inside the evaporative emission system, determining a fuel residency time representing the amount of time the fuel has resided above the current temperature, and performing a system diagnostic test of the evaporative emission system only if the fuel residency time exceeds a minimum fuel residency time.
    Type: Application
    Filed: December 7, 2000
    Publication date: August 8, 2002
    Inventors: Jeffrey Kaiser, Allen Joseph Lehmen, Timothy Gernant