Patents by Inventor Hans-Peter Stellet

Hans-Peter Stellet 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 apparatus for operating a spark-ignited reciprocating-piston internal combustion engine
    Patent number: 5870993
    Abstract: To reduce fuel consumption and exhaust emissions in an internal combustion engine a comparatively large quantity of exhaust gas is recirculated and a specific swirling flow is imposed on the exhaust gas as it is introduced into the combustion chamber. For this purpose the exhaust duct has a chamfer formed on only one side in the region of a flow cross-section. The swirling flow of exhaust gas rotating about an axis parallel to the cylinder axis, together with the supply of fresh gas, assures an increased fresh-gas concentration in the region of the spark plug.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: February 16, 1999
    Assignee: Volkswagen AG
    Inventors: Hans-Peter Stellet, Helmut Endres