Patents by Inventor Willi Strohl

Willi Strohl 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).

  • Publication number: 20080102336
    Abstract: The invention relates to a fuel cell system comprising a fuel cell unit (1) and a metering unit for metering a quantity of a substance for at least one electrode (3, 5), said metering unit comprising at least two metering elements (16, 17) that are connected in parallel. Said system simplifies the control of the substance quantity to be metered and permits in particular a comparatively sensitive and/or relatively rapid control of the substance quantity to be metered or has the lowest possible internal consumption. The system should also be capable of diagnosing faults, i.e. should recognise a development of pressure ratios that could damage the system. To achieve this, the first metering element (16) is configured as a control element for controlling the flow cross-section of the second metering element (17) by means of a pneumatic coupling.
    Type: Application
    Filed: February 9, 2006
    Publication date: May 1, 2008
    Inventors: Willi Strohl, Ulrich Gottwick
  • Publication number: 20060194091
    Abstract: A fuel cell system has a fuel cell unit including an anode, and a recirculation unit for recirculating hydrogenous operating material flowing out of the fuel cell unit back into the fuel cell unit, wherein the recirculation unit has at least one drive unit for driving a flow of an operating material, and the drive unit is configured as a pneumatic drive unit or hydraulic drive unit for utilizing an energy of a fluid.
    Type: Application
    Filed: February 23, 2006
    Publication date: August 31, 2006
    Inventors: Willi Strohl, Guenther Bantleon, Thanh-Hung Nguyen-Schaefer, Klaus Reymann, Michael Baeuerle, Helmut Schneider, Gunter Winkler, Thomas Heid
  • Patent number: 6851922
    Abstract: The flow pump has an impeller, driven in a pump chamber and having a ring of blades spaced apart from one another in the circumferential direction on at least one end face and ending at the face end of the impeller and cooperate therewith to define blade chambers. In the pump chamber, at least one feed conduit in the form of a split ring cooperates with the ring of blades on the impeller, and at least one intake opening discharging into the feed conduit is embodied in a pump chamber wall that defines the pump chamber in the direction of the pivot axis of the impeller. In an initial region at the at least one intake opening and/or in the circumferential direction of the impeller, adjoining the impeller, the feed conduit extends radially farther inward than the blade chamber bottom of the impeller, and the transition between a radially inner blade chamber bottom of the blade chambers and the associated face end of the impeller has a chamfer or rounded corner.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: February 8, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Michael Kuehn, Willi Strohl, Hans-Joerg Fees, Thomas Wieland
  • Patent number: 6802301
    Abstract: The invention relates to a fuel supply system for an internal combustion engine, having a unit such as a pressure regulator, mounted in electrically insulated fashion and including an electrically conductive housing, and the housing is connected via an electrical connection to a defined electrical potential. As a result, static charging of the unit, which could become dangerous, is precluded. The fuel supply system is intended in particular for pumping fuel to an internal combustion engine of a motor vehicle.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: October 12, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Edwin Fauser, Stephan Kleppner, Kurt Frank, Hans-Peter Braun, Wolfgang Bueser, Klaus-Dieter Hufnagel, Willi Strohl, Jochen Rose, Wolfgang Hiller, Erich Eiler, Frantisek Buric, Jaroslav Moucka
  • Publication number: 20040028520
    Abstract: The flow pump has an impeller (10), driven to revolve about a pivot axis (14) in a pump chamber (12), which impeller, on at least one face end (44), has a ring of blades (16) spaced apart from one another in the circumferential direction, which end at the face end (44) of the impeller (10) and which between them define blade chambers (20). In the pump chamber (12), at least one feed conduit (34) in the form of a split ring is embodied that cooperates with the ring of blades (16) on the impeller (10), and at least one intake opening (36) discharging into the feed conduit (34) is embodied in a pump chamber wall (30) that defines the pump chamber (12) in the direction of the pivot axis (14) of the impeller (10).
    Type: Application
    Filed: September 5, 2003
    Publication date: February 12, 2004
    Inventors: Michael Kuehn, Willi Strohl, Hans-Joerg Fees, Thomas Wieland
  • Patent number: 6672288
    Abstract: In a feed unit for delivering fuel from a supply tank (10) with a filter cup (13) having a central chamber (14) and an annular chamber (15) enclosing the latter, with a filter cover (30) which closes the annular chamber (15) and which contains an inlet duct (36) to the annular chamber (15) and an outlet duct (37) from the annular chamber (15), and with a feed pump (22) which is inserted in the central chamber (14) and which projects with a suction connection piece (26) through an opening (20) into a suction space (19), assembly is simplified and manufacturing costs are reduced in that the clearance diameter of the central chamber (14) is dimensioned so as to be greater than the outer diameter of the pump housing (23), and an axially projecting pressure connection piece (27) is formed at the other end side of the housing (23) remote of the suction connection piece (26) and a mounting cap (38) which engages over the pressure connection piece (27) is formed at the filter cover (30).
    Type: Grant
    Filed: January 19, 2000
    Date of Patent: January 6, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Peter Schelhas, Dietmar Schmieder, Willi Strohl, Albert Gerhard
  • Publication number: 20020124833
    Abstract: The invention relates to a fuel supply system for an internal combustion engine, having a unit such as a pressure regulator, mounted in electrically insulated fashion and including an electrically conductive housing, and the housing is connected via an electrical connection to a defined electrical potential. As a result, static charging of the unit, which could become dangerous, is precluded. The fuel supply system is intended in particular for pumping fuel to an internal combustion engine of a motor vehicle.
    Type: Application
    Filed: May 8, 2002
    Publication date: September 12, 2002
    Inventors: Edwin Fauser, Stephan Kleppner, Kurt Frank, Hans-Peter Braun, Wolfgang Bueser, Klaus-Dieter Hufnagel, Willi Strohl, Jochen Rose, Wolfgang Hiller, Erich Eiler, Frantisek Buric, Jaroslav Moucka
  • Patent number: 6435163
    Abstract: The invention relates to a fuel supply system for an internal combustion engine, having a unit, such as a pressure regulator, mounted in electrically insulated fashion and including an electrically conductive housing, and the housing is connected via an electrical connection to a defined electrical potential. As a result, static charging of the unit, which could become dangerous, is precluded. The fuel supply system is intended in particular for pumping fuel to an internal combustion engine of a motor vehicle.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: August 20, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Edwin Fauser, Stephan Kleppner, Kurt Frank, Hans-Peter Braun, Wolfgang Bueser, Klaus-Dieter Hufnagel, Willi Strohl, Jochen Rose, Wolfgang Hiller, Erich Eiler, Frantisek Buric, Jaroslav Moucka
  • Patent number: 6415771
    Abstract: An apparatus for pumping fuel from a tank (10) to the internal combustion engine (12) of a vehicle has a jet pump (24), which supplies fuel returning from the internal combustion engine (12) in a return line (22) together with fuel disposed in the tank (10) into a storage reservoir (14) of a fuel delivery unit (16). The invention proposes embodying a restriction (23) for the fuel between a seat edge (31) and a spring-loaded ball (32). In addition, inlet openings (39) for the fuel disposed in the tank (10) are embodied in the vicinity of the restriction (23). The apparatus has the advantage of a high delivery output, a compact design, and a delivery onset even when there are relatively low return quantities. Furthermore, fuel is prevented from flowing back into the return line (22).
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: July 9, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Steffen Mihatsch, Willi Strohl, Erich Eiler
  • Patent number: 6361291
    Abstract: The invention relates to a fuel delivery unit, having a side channel pump that in a housing (13) has a pump chamber (14) and in the pump chamber (14) has an impeller (16), and having an electric motor (12) that drives the impeller (16) and has a stator and a rotor (29). The impeller (16) of the fuel delivery unit is the rotor (29) of an asynchronous motor. The electric motor (12) can be assembled from only a few, highly reliable and strong components.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: March 26, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Klaus Dobler, Michael Huebel, Willi Strohl
  • Patent number: 6358412
    Abstract: A feed device for fuel has a feed pump driven by an electric motor and a housing which receives the electric motor. The feed pump and a filter arrangement which has a preliminary pump and a main pump arranged respectively before and behind the feed pump in the fuel flow direction are provided in the housing. The feed pump transports the main flow of fuel through a central recess in the filter pot at the input flow side of the main filter of the filter arrangement. A side channel pump which is open on one side is arranged at the feed pump as a preliminary stage thereof. The fuel can be delivered subsequent to the preliminary filter to a rise pipe and then into a pot housing to a suction area of the main stage of the feed pump.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: March 19, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Willi Strohl, Dietmar Schmieder
  • Patent number: 6287093
    Abstract: The invention relates to a side-channel pump having an intake cover (10), which is used in pumping fuel in a motor vehicle. The intake cover (10) has a side channel (11), extending radially about a pivot point (14) in the intake cover (10), a first opening (13) for an intake channel (27) of the side channel (11) and a constant side channel width (BSK) in a portion extending circumferentially. The side channel (11) has a side channel width (BSK) in the top side (8) that is constant, as seen from a beginning (12) of the side channel (11), already at a value of a first angle (&phgr;) of between 0 and preferably approximately 5 and at most 20 , referred to a line (LB) through the pivot axis (14) and through a contact point (1) at the beginning (12). This makes for better hot-gasoline performance, increased efficiency, and a higher pressure ratio of the side-channel pump. The intake cover is suitable in particular for a dual-flow side-channel pump.
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: September 11, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Michael Huebel, Willi Strohl
  • Patent number: 6279545
    Abstract: A fuel supply system for fuel supply of an internal combustion engine has a fuel supply container, a fuel supply unit having a pressure limiting valve providing an adjustable maximum pressure, a fuel supply conduit having a pressure regulating valve adjustable to an operational pressure for maintaining a regulated operational pressure in the fuel supply conduit, a fuel return conduit adapted to connect the internal combustion engine with the fuel supply container, and a delay valve associated with the pressure regulating valve for loading the fuel supply conduit with an initial pressure which is higher than an operational pressure.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: August 28, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Kurt Frank, Willi Strohl
  • Patent number: 6238191
    Abstract: The apparatus for supplying fuel includes a fuel tank and a fuel feed unit in the fuel tank. The fuel feed unit has a main housing, a suction cover arranged in a bottom part of the main housing, a fuel pump and a degassing valve arranged in the suction cover for degassing the fuel pump. The fuel pump itself includes an impeller housing with a circular passage for fuel flow and an electric-motor-driven impeller. The impeller housing is arranged in the main housing and next to the suction cover and it is provided with a degassing passage connecting the circular passage with the degassing valve. To improve starting behavior the fuel feed unit has a degassing valve in the suction cover, which is connected with the circular passage of the impeller housing by a degassing passage. The degassing valve opens to the fuel tank when pressure in the degassing passage exceeds a predetermined value for degassing the fuel pump.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: May 29, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Willi Strohl, Dietmar Schmieder, Albert Gerhard, Jochen Rose, Erich Eiler
  • Patent number: 6209527
    Abstract: A pressure regulating valve has a valve chamber having an inlet for connecting to a pressure source, a discharge chamber communicating through a valve opening with the valve chamber, a valve member, a valve seat surrounding the valve opening, a valve closing spring which presses the valve member against the valve seat with an adjustable spring force, and a throttling surface arranged downstream of the valve opening so that between the valve member and an inner wall of the discharge chamber, a pressure is formed at the valve member which counteracts the spring force.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: April 3, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Bueser, Michael Niederkofler, Willi Strohl, Jochen Rose, Erich Eiler
  • Patent number: 6179579
    Abstract: A multi-stage side-channel pump (1) in particular for fuel for a motor vehicle, having at least first blade chambers (16) of a precursor stage (7) and second blade chambers (17) of a main stage (10). The side-channel pump (1) has an electric motor (19) for driving an impeller (13). The electric motor (19) has a rotor (22) and a stator (24). The first blade chambers (16) of the precursor stage (7) and the second blade chambers 17 of the main stage (10) are integrated with the impeller (13). The impeller (13) can also form the rotor (22), making it possible to produce an extremely shallow side-channel pump (1). This pump is employed preferably for fuel delivery in gasoline injection to an internal combustion engine.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: January 30, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Klaus Dobler, Michael Huebel, Willi Strohl
  • Patent number: 6161574
    Abstract: The invention relates to a device for a fuel system, having a pressure chamber that communicates with a fuel connection and having a diaphragm that is installed at its outer peripheral region in a housing and partitions off the pressure chamber. A preassembled unit can be fastened, with the diaphragm built into the housing, on the basic body and the diaphragm can come to rest on a stop provided on the basic body. The device is intended in particular for regulating a pressure in a fuel system.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: December 19, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Albert Gerhard, Willi Strohl, Jochen Rose, Erich Eiler
  • Patent number: 6149404
    Abstract: A feed unit for fuel, has a pump chamber (14) and an impeller (16) disposed in the pump chamber, an electric motor (12) driving the impeller (16), the electric motor (13) with a rotor formed as the impeller (16) of the feed pump (11), in order to achieve an extremely flat design in the axial direction.
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: November 21, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Klaus Dobler, Michael Huebel, Willi Strohl
  • Patent number: 6145536
    Abstract: The invention relates to a device for a fuel supply system, having a pressure chamber that communicates with a fuel connection, and having a diaphragm built in on its outer peripheral region in a basic body which partitions off the pressure chamber, wherein the diaphragm is fastened in the peripheral region with a spring ring that is under initial tension and is retained on the basic body.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: November 14, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Albert Gerhard, Willi Strohl, Jochen Rose, Erich Eiler
  • Patent number: 6113362
    Abstract: In connection with a flow pump, particularly for the conveying of fuel from a fuel tank of a motor vehicle, with a pump chamber (16), an impeller wheel (24) rotating in the pump chamber (16), and two parallel side walls (17, 18) spaced apart from each other and delimiting the pump chamber (16), in one of which a groove-like side channel (26), open toward the pump chamber (16), is disposed, which extends concentrically to the pump axis from a channel start (261) to a channel end (262), a further pump inlet (30) for the connection of a fluid return line (13) and which opens directly into the side channel (26) at a distance from the channel end (262), is provided for the purpose of improved efficiency of the flow pump.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: September 5, 2000
    Assignee: Robert Bosch GmbH
    Inventors: Dietmar Schmieder, Willi Strohl, Jochen Rose, Erich Eiler