Patents Represented by Attorney Edward E. Griegg
  • Patent number: 5975064
    Abstract: An exhaust gas recirculation valve having a valve member that cooperates with a valve seat of a connection neck of an exhaust gas recirculation line. The neck protrudes into a tube of the intake system of an internal combustion engine, and the valve seat points toward the inlet side of the exhaust gas recirculation line. A valve member of the exhaust gas recirculation valve is thus acted upon by the exhaust gas pressure in the closing direction, as a supplement to a compression spring counter to an armature of an electromagnet acting in the opening direction. To compensate for the forces acting in the closing direction, the exhaust gas is carried via a conduit in the valve shaft into a control chamber, which is closed off from the pressure in the tube via a movable wall, having an effective surface area that substantially corresponds to the effective surface area of the valve member.
    Type: Grant
    Filed: August 14, 1998
    Date of Patent: November 2, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Erwin Krimmer, Bruno Hezel, Eberhard Wizgall, Tilman Miehle, Peter Jauernig