Patents by Inventor Ulrich Projahn

Ulrich Projahn 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: 5392750
    Abstract: An arrangement for supplying fuel to an internal combustion engine of a motor vehicle has a supply tank, an aggregate which is located in the supply tank and a fuel delivery unit for supplying fuel from the supply tank to the internal combustion engine. The aggregate has a plurality of components extending along a delivery path of the fuel, is located in the supply tank, and is provided with a supporting element which carries a holding member for the components of the aggregate.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: February 28, 1995
    Assignee: Robert Bosch GmbH
    Inventors: Klaus-Bernhard Laue, Karl Mielich, Kurt Frank, Werner Schmid, Wolfgang Soyer, Hans-Joachim Kuppel, Hellmut Kegel, Bernhard Lucas, Ulrich Projahn
  • Patent number: 4989408
    Abstract: A device for removing solid particles, in particular soot particles, from the exhaust gas of internal combustion engines includes a centrifugal separator or cyclone 11 to separate the untreated gas flow 10 into coaxially removed pure gas flow 23 and a particle-enriched carrier gas flow 24 and includes a combustion device 12 for burning the solid particles carried in the carrier gas flow.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: February 5, 1991
    Assignee: Robert Bosch GmbH
    Inventors: Rolf Leonhard, Ulrich Projahn
  • Patent number: 4982565
    Abstract: Pilot burner especially for a device for burning soot in the exhaust gas of diesel engines, including a hollow cylindrical mixing chamber 10 and glow plug chamber 11 connected transversely thereto via an opening 12. A fuel supply pipe 28 ends into the glow plug chamber 11 and an air supply pipe 18 ends into the mixing chamber 10. In the area of the spiral incandescent filament 28, the glow plug is coaxially surrounded by a protective tube 26 made of wire fabric. The fuel supply pipe 28 ends in an orifice extension piece 27 which extends radially into the glow plug chamber 11. The protective tube 26 has a large surface so that the fuel hitting thereon uniformly evaporates. The protective tube 26 is welded to a sleeve 37 which is screwed into glow plug chamber 11 and can hence be easily replaced.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: January 8, 1991
    Assignee: Robert Bosch GmbH
    Inventor: Ulrich Projahn
  • Patent number: 4858433
    Abstract: A pilot burner for a device for burning off solid particles, especially soot particles, in the exhaust gas of internal combustion engines has a hollow-cylindrical mixture preparation chamber receiving a glow element and extending eccentrically thereto a hollow-cylindrical glow plug receiving chamber. The two chambers communicate with one another via an opening formed by piercing the chamber walls. A fuel inflow line discharges in the receiving chamber and an air supply line discharges into the preparation chamber. To improve the mixture preparation and largely avoid carbonization of the glow plug, the air supply line discharges into two inflow openings having a tangential direction; one inflow opening is located opposite the opening between the two chambers, and the other inflow opening is located near the end face of the preparation chamber having a mixture outlet opening. In obth inflow openings, the combustion air is introduced in the same direction.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: August 22, 1989
    Assignee: Robert Bosch GmbH
    Inventors: Alfred Knauer, Rolf Leonhard, Ulrich Projahn, Wolfgang Stolper
  • Patent number: 4858432
    Abstract: A pilot burner for a device for burning off solid particles, in particular soot particles, in the exhaust gas of internal combustion engines has a hollow-cylindrical mixture preparation chamber receiving a glow element and a hollow-cylindrical glow plug receiving chamber extending transversely to it and communicating with it through an opening. A fuel inflow line discharges into the receiving chamber and an air supply line discharges into the preparation chamber. To improve mixture preparation and largely avoid carbonization of the glow plug, the glow plug is coaxially surrounded in the vicinity of its coil at a radial distance by a protective sleeve. The fuel inflow line ends at an orifice fitting that protrudes radially into the receiving chamber and discharges immediately in front of the protective sleeve.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: August 22, 1989
    Assignee: Robert Bosch GmbH
    Inventors: Alfred Knauer, Ulrich Projahn
  • Patent number: 4858431
    Abstract: An apparatus for removing solid particles, especially soot particles, from the exhaust gases of an internal combustion engine includes a separator that divides the flow of exhaust gases into a largely particle-free primary flow and a particle-enriched secondary flow. The secondary flow is delivered to a disposal device, which has a combustion chamber and a pilot burner for producing a flame that burns off the solid particles. To improve the efficiency of the apparatus by reducing the heating output required, a filter is provided in the combustion chamber, which divides the combustion chamber into a filter pre-chamber and after-chamber. The burnoff flame of the pilot burner burns into the filter pre-chamber, and the burnoff gases are removed via an outlet opening disposed in the filter after-chamber. The secondary exhaust gas flow is delivered to the filter pre-chamber with a tangential inflow direction.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: August 22, 1989
    Assignee: Robert Bosch GmbH
    Inventors: Rolf Leonhard, Ulrich Projahn
  • Patent number: 4731994
    Abstract: An apparatus for burning solid particles, in particular soot particles, in the exhaust gas of internal combustion engines having a combustion chamber and an ignition burner connected coaxially through an overflow opening. The combustion chamber includes an annular cup portion forming a hot combustion chamber that is open toward the overflow opening, and downstream of this hot combustion chamber has a plurality of labyrinthine annular conduits toward which a plunger tube extends centrally toward the combustion chamber, through which tube a flow of exhaust gas carrying the soot particles is directed into the hot combustion chamber. The flow of exhaust gas having the soot particles emerges into the hot combustion chamber through radial outlets transversely to the direction of extension of the ignition flame that is propagating through the overflow opening. The soot particles that are supplied are for the most part burned in the hot combustion chamber, and the remainder is burned in the labyrinthine conduits.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: March 22, 1988
    Assignee: Robert Bosch GmbH
    Inventors: Hubert Dettling, Rolf Leonhard, Ulrich Projahn
  • Patent number: 4716725
    Abstract: An apparatus for burning solid particles, in particular soot particles, in the exhaust gas of internal combustion engines comprising a combustion chamber and an ignition burner connected coaxially through an overflow opening. The ignition burner, to which fuel and combustion air are supplied, has a rotationally symmetrical glow element disposed centrally in a preparation chamber and has a glow plug disposed in a bulge of the preparation chamber. The combustion chamber includes an annular cup-like portion forming a hot combustion chamber that is open toward the overflow opening, and downstream of this hot combustion chamber has a plurality of labyrinthine annular conduits toward which a plunger tube extends centrally toward the combustion chamber, through which tube a flow of exhaust gas carrying the soot particles is directed into the hot combustion chamber.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: January 5, 1988
    Assignee: Robert Bosch GmbH
    Inventors: Hubert Dettling, Rolf Leonhard, Ulrich Projahn