Patents by Inventor Detlef Kettner

Detlef Kettner 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: 6644054
    Abstract: A method and a device for operating a refrigerant system in an air conditioning unit for an automobile, in which air flowing through an evaporator is cooled via a refrigerant, the delivery rate of which is set by means of a compressor operated by a drive. The speed of the drive, operated independently of the automobile engine, is determined as a function of a suction pressure to be set on the compressor, thereby providing optimal energy consumption by the system.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: November 11, 2003
    Assignee: Siemens VDO Automotive AG
    Inventors: Detlef Kettner, Werner Schiller
  • Patent number: 6341496
    Abstract: It is proposed to design a compression-type refrigeration system of a motor-vehicle air-conditioning unit having a supercritical process, with a compressor (6), driven by an electric motor (5) with motor-control device (12), a gas cooler (27), an expansion member (8) and an evaporator (9) and also connecting elements for a circulation of a refrigerant, in such a way that the heat loss of the motor and/or of the motor-control device is essentially dissipated to the refrigerant. In particular, the refrigerant may flow around the motor and/or the motor-control device. This results in especially efficient cooling of the components, as a result of which their heat loss is reduced at the same time. Furthermore, in order to achieve a high efficiency of the entire unit, provision is made for the superheating of the refrigerant at the inlet of the compressor to be kept at a virtually constant level by a controlled expansion member.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: January 29, 2002
    Assignee: Mannesmann VDO AG
    Inventors: Detlef Kettner, Hans-Martin Knaus, Siegfried Reuter
  • Patent number: 5971287
    Abstract: A method and a system for regulating the mixed air in a heating/air-conditioning unit (1) of a motor vehicle in which fresh air and/or recirculated air are fed to a heating/air-conditioning unit (1) which controls the feeding of fresh air and/or recirculated air in the passenger compartment of the vehicle. In a method for optimizing the consumption of energy for such heating/air-conditioning systems, the feed of fresh air and/or recirculated air is so adjusted that the temperature of the dew point of the air within the vehicle is less than the temperature on the inside of a window of the vehicle.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: October 26, 1999
    Assignee: Max Kammerer GmbH
    Inventors: Detlef Kettner, Gregor Gattnar
  • Patent number: 5907954
    Abstract: A method of and system for regulating mixed air in an air-conditioning system of a motor vehicle provides for feeding fresh air and/or recirculated air to the air conditioning system. For optimizing the energy consumption for automobile air-conditioning systems, the specific enthalpy of the fresh air and the specific enthalpy of the recirculated air and/or of a mixed air are determined and, after a comparison of the specific enthalpies, a feed of fresh air and recirculated air is so adjusted that the mixed air has the specific enthalpy which is in each case most favorable from an energy standpoint.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: June 1, 1999
    Assignee: Max Kammer GmbH
    Inventor: Detlef Kettner