Patents by Inventor Roland Lohmann

Roland Lohmann 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).

  • Cylinder head for a multi-cylinder direct-injection spark-ignition internal combustion engine
    Patent number: 6557522
    Abstract: A cylinder head for a direct-injection spark-ignition internal combustion engine includes, for each cylinder, an inlet valve, an exhaust valve, a first receptacle, a second receptacle, and a third receptacle. The first, second, and third receptacles are respectively configured to receive an ignition device or an injection device. The first receptacle extends substantially parallel to the inlet valve. The second receptacle extends substantially parallel to the exhaust valve. A common camshaft is offset from a cylinder center plane and actuates the inlet valve and the exhaust valve via identically constructed valve actuating elements. The cylinder head is lightweight, compact and easy to assemble and is in particular suited for high performance engines.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: May 6, 2003
    Assignee: Audi Aktiengesellschaft
    Inventors: Hartmut Diel, Roland Lohmann, Holger Wagner
  • Cylinder head for a multi-cylinder direct-injection spark - ingnition internal combustion engine
    Publication number: 20020078920
    Abstract: A cylinder head for a direct-injection spark-ignition internal combustion engine includes, for each cylinder, an inlet valve, an exhaust valve, a first receptacle, a second receptacle, and a third receptacle. The first, second, and third receptacles are respectively configured to receive an ignition device or an injection device. The first receptacle extends substantially parallel to the inlet valve. The second receptacle extends substantially parallel to the exhaust valve. A common camshaft is offset from a cylinder center plane and actuates the inlet valve and the exhaust valve via identically constructed valve actuating elements. The cylinder head is lightweight, compact and easy to assemble and is in particular suited for high performance engines.
    Type: Application
    Filed: September 10, 2001
    Publication date: June 27, 2002
    Inventors: Hartmut Diel, Roland Lohmann, Holger Wagner