Patents by Inventor Andreas Spieth

Andreas Spieth 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 operating an internal combustion engine with direct fuel injection during a post-start phase
    Patent number: 7370629
    Abstract: In a method for operating a spark-ignition internal combustion engine with direct fuel injection in the post-start phase at low temperatures, fuel is supplied to the combustion air in a pilot injection (MH) of a first fuel quantity during an intake stroke of the internal combustion engine such that the pilot injection (MH) forms a homogeneous, lean air/fuel mixture (?>1) in substantially the entire combustion chamber, and a main injection (MS) of a second fuel quantity is subsequently injected into the combustion chamber during a compression stroke directly before the ignition time (ZT), said main injection (MS) forming in the region of the spark plug a stratified, rich air/fuel mixture (?<1), which is then ignited by the spark plug.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: May 13, 2008
    Assignee: Daimler AG
    Inventors: Bernd Köhler, Christoph Lux, Michael Oechsle, Andreas Spieth
  • Method for operating an internal combustion engine with direct fuel injection during a post-start phase
    Publication number: 20070056553
    Abstract: In a method for operating a spark-ignition internal combustion engine with direct fuel injection in the post-start phase at low temperatures, fuel is supplied to the combustion air in a pilot injection (MH) of a first fuel quantity during an intake stroke of the internal combustion engine such that the pilot injection (MH) forms a homogeneous, lean air/fuel mixture (?>1) in substantially the entire combustion chamber, and a main injection (MS) of a second fuel quantity is subsequently injected into the combustion chamber during a compression stroke directly before the ignition time (ZT), said main injection (MS) forming in the region of the spark plug a stratified, rich air/fuel mixture (?<1), which is then ignited by the spark plug.
    Type: Application
    Filed: October 13, 2006
    Publication date: March 15, 2007
    Inventors: Bernd Kohler, Christoph Lux, Michael Oechsle, Andreas Spieth