Patents Represented by Attorney Edwin E. Greigg
  • Patent number: 6250893
    Abstract: A radial piston pump for a high-pressure fuel supply in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a drive shaft which is supported in a pump housing and is embodied eccentrically or has cam-like protrusions in the circumferential direction. A plurality of pistons are disposed radially in given cylinder chambers relative to the drive shaft (4), and the pistons are movable radially back and forth in the respective cylinder chamber by rotation of the drive shaft. In carrying out the invention, a transverse force absorbing device is disposed between each piston and the drive shaft. This has the advantage that only forces in the longitudinal direction are brought to bear on the pistons. This means that virtually no moments act on the pistons.
    Type: Grant
    Filed: August 3, 1999
    Date of Patent: June 26, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Bernd Streicher
  • Patent number: 6247453
    Abstract: A fuel injection valve for internal combustion engines, having a valve member which is axially displaceable in a bore of a valve body and which on an end toward the combustion chamber has a valve member head. The head forms a valve closing member, which on one side toward the valve body has a sealing face, with which the sealing face cooperates with a valve seat face provided on the face end of the valve body toward the combustion chamber. An injection opening in the valve member head, which emerges from a pressure chamber, formed between the valve member and the wall of the bore, and leads away along the circumferential wall of the valve member head. The injection opening is closed by the wall of the bore when the valve member is resting on the valve seat and is opened by an outward-oriented opening stroke motion of the valve member.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: June 19, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Roger Potschin, Friedrich Boecking
  • Patent number: 6247655
    Abstract: A fuel injection valve for internal combustion engines, with a valve member which is guided axially displaceably in a bore of a valve body and which has, at its end on the combustion space side, a conical valve sealing face, the conical valve sealing face cooperates with a conical valve seat face at that end of the bore on the combustion space side. A blind hole or a conical region adjoins said bore on the combustion space side, with a pressure space that opens onto the valve seat and located between the valve member shank and the wall of the bore, and with at least one injection duct which leads from an inner wall of the injection valve. The inner wall being located downstream of the valve seat. To form the injection jet, the entry regions of the injection duct are rounded, an upper entry region which faces the pressure space having a large radius (RA) and a lower entry region which faces away from the pressure space having a smaller radius (RB). At the same time, the size of the radius (RA) is 0.02 to 0.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: June 19, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Erguen Filiz, Friedrich Boecking
  • Patent number: 6247763
    Abstract: A pressure fluid reservoir for supplying pressure fluid to a wheel slip regulating device that is accommodated in a vehicle has a hose membrane that can be partially emptied by suction. The degree of emptying is limited due to the installation of an inner support body that fluid can flow through. The radial expansion of the hose membrane is limited by an outer support element and by a porous casing encompassing the outer support element, which protects the pressure fluid reservoir from bursting in the event that the hose membrane is subjected to brake pressure. The inner support element, the outer support element, and the casing are flexible hoses and are connected in a pressure-tight fashion to tube line connections in such a way that the pressure fluid reservoir according to the invention is placed in the vehicle in the same way as a brake line.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: June 19, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Jan-Michael Rehn, Harald Ott
  • Patent number: 6247452
    Abstract: A fuel injection valve for internal combustion engines, having an axially displaceable valve member which is disposed in a valve body. On an end toward an engine combustion chamber the valve member has a conical valve sealing face with which the valve member cooperates with a conical valve seat face on the valve body for controlling an injection cross section. Via an internal guide the valve member is guided slidingly displaceably on a tang of a stationary insert body.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: June 19, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Bernd Dittus, Friedrich Boecking
  • Patent number: 6244245
    Abstract: A valve control unit for a fuel injection valve includes a housing body with two valve control chambers that continuously communicate with each other. An end member of a movable valve control piston can be moved inside the first valve control chamber and the first valve control chamber communicates with an inlet conduit for fuel. The second valve control chamber communicates with an outlet conduit that can be closed by a ball valve. The end member is comprised of an inner structural member and an outer structural member that can move in relation to each other. In the movement of the valve control piston, only the outer structural member is moved for a preinjection of fuel and the inner structural member is moved for the main injection. The quantity of preinjected fuel can be further minimized while an increased movement speed of the valve control piston is simultaneously possible during the main injection.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: June 12, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Friedrich Boecking
  • Patent number: 6244295
    Abstract: The invention relates to a check valve with a tubular valve housing in which a valve ball is received. To make a large flow cross section available and to prevent closure by the valve ball when the check valve is fully open, a perforated disk is press-fitted between longitudinally extending guide ribs of the valve housing and a circumferential wall of the valve housing there is an interstice as an outflow opening, which is not closed even the valve ball contacts the perforated disk. The valve housing is made by stamping, in which the guide ribs and a valve seat are made in one operation and are thereby aligned exactly with one another. In this way, a small radial play of the valve ball can be realized.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: June 12, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Walter Bartussek, Joerg Heusinkveld, Hubert Hueber, Werner Rittler, Juergen Haecker, Harald Ott, Harald Aicher
  • Patent number: 6244253
    Abstract: A pressure control valve for a fuel injection apparatus for internal combustion engines, including a housing with a high-pressure connection and a return connection and including a cup-shaped piston, which is disposed in a housing bore, can be moved axially between a valve seat oriented toward the high-pressure connection and a stop oriented toward the return connection, counter to the spring force of a spring acting in the direction of the valve seat, and has at least one through opening that connects the inside of the cup-shaped piston to the housing bore, is characterized in that at least one throttle element is disposed upstream and/or downstream of the valve seat in the flow direction of the fuel.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: June 12, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Rainer Haeberer, Frieder Buerkle, Helmut Clauss, Markus Rueckle
  • Patent number: 6244832
    Abstract: The invention relates to a radial piston pump for high-pressure fuel delivery in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a housing, a drive shaft that is supported in the pump housing and has an eccentrically embodied shaft segment. A ring is slidingly supported on the shaft segment and cooperates with a plurality of pistons. The pistons are disposed radially with respect to the drive shaft in a respective cylinder chamber. Ends of the pistons oriented toward the drive shaft each have a respective plate. To improve engine efficiency, the cylinder chambers are filled with less fuel as the demand drops, this prevents increased wear and damage from occurring during operation. The problem of wear and damage is solved in that all the plates are kept in contact with the ring by a leaf-spring-like device, in particular a single clamp. In a radial piston pump in which a plate is held by a plate holder, the plate holder is secured to the ring.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: June 12, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Josef Guentert, Hans-Juergen Simon, Bernd Streicher
  • Patent number: 6244250
    Abstract: A common rail injector having an injector housing that can be made to communicate via a high-pressure connection with a high-pressure reservoir. A nozzle needle is axially displaceable against a nozzle needle seat in order to adjust the injection onset and the injection quantity in a common rail injection system of an internal combustion engine as a function of the position of a magnet-controlled control piston that is prestressed counter to a spring. To make it possible that during operation to characterize the opening and closing operation of the nozzle needle, the nozzle needle is coupled via an intermediate piece to a servo piston that cooperates with the control piston.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: June 12, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Jaroslaw Hlousek
  • Patent number: 6240905
    Abstract: A unit fuel injector for delivering fuel to a combustion chamber of direct-injection internal combustion engines, having a pump unit for building up an injection pressure and for injecting the fuel via an injection nozzle into the combustion chamber. A control unit with a control valve that is embodied as an outward-opening A-valve, and a valve actuation unit for controlling the pressure buildup in the pump unit. In order to create a unit fuel injector with a control unit that has a simple design, is small in size, and in particular has a short response time, the valve actuation unit is embodied as a piezoelectric actuator.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: June 5, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Friedrich Boecking
  • Patent number: 6239372
    Abstract: An electrical connection in which a flexible, elastic conductor track carrier is affixed by a connecting end to an electrical component and embedded in potting compound. To prevent breakage at the fastening point at the transition from the potting compound to the outside, the conductor track carrier is reinforced with additional layers of insulating material.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: May 29, 2001
    Assignees: Robert Bosch GmbH
    Inventors: Bernhard Gartner, Matthias Schnell, Joerg Wolke, Peter Schaefer, Hans-Erich Steinmann, Guenter Trogisch
  • Patent number: 6238189
    Abstract: A radial piston pump for a high-pressure fuel supply in fuel injection systems of internal combustion engines includes a drive shaft, supported in a pump housing, and a plurality of pistons disposed radially with respect to the drive shaft in respective cylinder chambers. The pistons are movable back and forth in the radial direction, and for each piston, one metal insert part forming the respective cylinder chamber is provided inside the housing and radially to the drive shaft to communicate with the intake side and with the high-pressure side. The respective insert part in the direction of the drive shaft between two flangelike metal housing parts with bearing faces extend perpendicular to the drive shaft and rests on these faces. The respective insert part has a fuel delivery opening and a fuel discharge opening, which discharges in the region of the bearing faces and are aligned with a further respective delivery and discharge opening in the housing parts.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: May 29, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Josef Guentert
  • Patent number: 6230842
    Abstract: The invention relates to a method for lubricating the teeth of a gear unit having a hollow wheel with an inner set of teeth and at least one pinion with an outer set of teeth that meshes with the inner set of teeth, and a gear unit with a hollow wheel with an inner set of teeth and at least one pinion with an outer set of teeth, which meshes with the inner set of teeth. To assure reliable supply of lubricant to the teeth during the operation of the gear unit, the invention proposes that the lubricant is introduced in a targeted way into the interior of the hollow wheel. The invention further proposes a gear unit, which has a device for the targeted delivery of lubricant into the interior of the hollow wheel.
    Type: Grant
    Filed: July 7, 1999
    Date of Patent: May 15, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Rainer Haeberer, Uwe Kuhn, Christoffer Uhr, Sandro Soccol, Thomas Lettner, Hanspeter Mayer
  • Patent number: 6230688
    Abstract: A process and system for generating and delivering high-pressure fuel to a high-pressure storage chamber of a fuel injection system of an internal combustion engine. The system includes a low-pressure pump as a pre-feed pump by which fuel is supplied from a tank and is delivered to the intake side of a high-pressure pump and a part of the fuel delivered by the low-pressure pump is used to lubricate the high-pressure pump. In order to reduce the temperature level in the return and to increase the overall efficiency of the motor, the system is embodied so that the delivery quantity of the low-pressure pump or the delivery pressure on the delivery side of the low-pressure pump is controlled as a function of the currently required fuel quantity determined by sensors and a control device.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: May 15, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Erhard Faix, Marc Westphal
  • Patent number: 6232882
    Abstract: To differentiate between lightning strikes and tornado generated electromagnetic signals, a tornado detection system and method is made up of RF receiving circuits which receive signals at two frequencies, while implementing a time variable automated calibration and the use of special algorithms, to reliably detect tornado events and to signal an alarm. A network of such systems can be implemented, using a plurality of antennas which are capable of discerning a directional vector, and integrating the directional information from multiple units by effecting a triangulation calculation in a server terminal to determining a position and path of an approaching tornado.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: May 15, 2001
    Assignee: Spectrum Electronics, Inc.
    Inventors: Aharon Ze'ev Hed, Richard Pavelle, Sol Aisenberg, George Freedman
  • Patent number: 6230686
    Abstract: A fuel injection valve for internal combustion engines, having a cylindrical valve body whose outside diameter decreases, forming an annular shoulder, in the direction of an injection opening. The valve body is braced axially against a holding body by means of a tension nut engaging the annular shoulder. The fuel injection valve is inserted into a stepped receiving bore in the housing of the engine, and the bore is sealed off via a sealing ring fastened between an annular end face of the tension nut and a housing shoulder of the receiving bore. The sealing ring disposed in axially secured fashion on the reduced-diameter shaft portion of the valve body, is characterized in that the sealing ring has a central circular opening, which is deformed in a defined way after being slipped onto the shaft part of the valve body.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: May 15, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Michael Lengowski
  • Patent number: 6227134
    Abstract: An elongate linear elastomeric fender comprising an outer sheath surrounding a core, wherein the core comprises a plurality of tubes, and the outer sheath has a higher compressibility than the core. The fender can be flexible and continuous, providing ease of transport and installation. The different layers of the fender provide different absorption of kinetic energy upon impact, and also dissipate impact energy transversely throughout the fender.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: May 8, 2001
    Assignee: Valpar Industrial Limited
    Inventor: Robert P Beckett
  • Patent number: 6227159
    Abstract: The invention relates to a refinement of an air guiding system for an internal combustion engine, having an intake conduit which adjoins an air inlet opening downstream and is part of a gas guiding chamber that carries air from the air inlet opening to an outlet opening. In the air guiding system, an air filter is embodied as an interchangeable cartridge in such a way that the air filter is insertable into and removed from the intake conduit.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: May 8, 2001
    Assignee: Robert Bosch GmbH
    Inventor: Peter Ropertz
  • Patent number: 6223726
    Abstract: A high-pressure fuel reservoir for a fuel injection system for internal combustion engines, which is supplied with high-pressure fuel by a high-pressure fuel pump and which has connections embodied as connection stubs, from each of the connection stubs one connecting bore discharges into the tubular body eccentrically to the axis of the tubular body. The tubular body is produced by forging, with three connecting stubs and fastening elements formed on by forging.
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: May 1, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Steffen Jung, Manfred Bacher-Hoechst, Heinz Popp, Alois Mair