Drip Prevention Means At Injector Nozzle Patents (Class 123/467)
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Patent number: 8695892Abstract: In a fuel injection device, a control body has a pressure control chamber, an inflow port and an outflow port. The inflow port and the outflow port are opened at an abutting surface exposed to the pressure control chamber. In the pressure control chamber is arranged a floating plate for pressing the abutting surface by a pressing surface with the pressure of the fuel to interrupt communication between the inflow port and the pressure control chamber. The abutting surface of the control body is provided with an outer opposite surface portion opposite to an outer edge of the pressing surface in a displacement axis direction of the floating plate, and the outer opposite surface portion has a special depressed portion that is depressed in the displacement axis direction and that extends along the shape of the outer edge of the pressing surface.Type: GrantFiled: February 8, 2011Date of Patent: April 15, 2014Assignee: Denso CorporationInventors: Yoichi Kobane, Shuichi Matsumoto, Naofumi Adachi, Tsukasa Yamashita, Fumihiro Fujikake
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Patent number: 8689772Abstract: A common rail fuel injector includes a fuel inlet, a set of nozzle outlets, a drain outlet, a nozzle chamber and a needle control chamber. A needle control valve includes a ceramic control valve member movable between a closed position in contact with a flat valve seat to block the needle control chamber from the drain outlet, and an open position at which the needle control chamber is fluidly connected to the drain outlet. A solenoid actuator is mounted in the injector body and includes an armature movable between an overtravel position and an energized position, but the armature has a stable un-energized position between the overtravel position and the energized position. A needle valve member is positioned in the injector body and includes an opening hydraulic surface exposed to fluid pressure in the nozzle chamber, and a closing hydraulic surface exposed to fluid pressure in the needle control chamber.Type: GrantFiled: May 19, 2011Date of Patent: April 8, 2014Assignee: Caterpillar Inc.Inventors: Gregory William Hefler, Adam Leonard Stecklein, Daniel Richard Ibrahim
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Patent number: 8683978Abstract: A fuel injection system is described, and which has an upstream portion and a downstream portion. The upstream portion includes a source of fuel, the fuel inlet of a fuel injection servo or flow regulator, and a first fuel flow line connected in fuel flowing relation relative to the source of fuel and to the fuel inlet of the fuel injection servo. The downstream portion includes a flow divider, at least one fuel outlet of the fuel injection servo, and a second fuel flow line connected in fuel flowing relation relative to the flow divider and the fuel outlet of the fuel injection servo. A fuel accumulator pressure damper is mounted in fuel flowing relation relative to the downstream portion of the fuel injection system so as to substantially reduce standing waves in the fuel injection system.Type: GrantFiled: August 26, 2013Date of Patent: April 1, 2014Assignee: Turn and Bank Holdings, Inc.Inventor: Jim Gregoire
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Patent number: 8678298Abstract: A method and system ensures that a certain amount of fuel is delivered by a fuel injector at each injection cycle over the life of the fuel injector. The injector has an armature that moves between open and close positions. A base time for the armature to move from the open position to the close position is established. A present time for the armature to move from the open position to the close position is compared to the base time. If the present time is greater than the base time by a predetermined amount, then 1) a present injector duration time is set to be greater than an original injector duration time to ensure that the certain amount of fuel is delivered by the fuel injector, or 2) a change in service condition is indicated for the fuel injector.Type: GrantFiled: February 15, 2011Date of Patent: March 25, 2014Assignee: Continental Automotive Systems, Inc.Inventor: Anup Vijaykumar Gongle
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Patent number: 8640675Abstract: A fuel injector has an injector body and a control rod, which is movable in the injector body along an axis for controlling opening/closing of a nozzle that injects fuel in an engine cylinder; the injector body houses a metering servovalve, provided with a control chamber and with an open/close element of a balanced type, axial sliding of which causes a variation in pressure in the control chamber; the metering servovalve comprises a valve body made of two pieces coaxially coupled to one another via a deformable ring, which defines also a gasket for guaranteeing fluid tightness between the two pieces and maintains in a fixed position a disk on which a calibrated restriction is made.Type: GrantFiled: June 25, 2009Date of Patent: February 4, 2014Assignee: C.R.F. Societa Consortile per AzioniInventors: Mario Ricco, Raffaele Ricco, Sergio Stucchi, Onofrio De Michele
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Patent number: 8622046Abstract: A fuel system for an engine is disclosed. The fuel system may have a pump, a plurality of fuel injectors, and a plurality of fuel accumulators. Each of the plurality of fuel accumulators may be disposed at least partially within a different cylinder head of the engine in fluid communication with an associated fuel injector of the plurality of fuel injectors. Each of the plurality of fuel accumulators may also be in fluid communication with adjacent fuel accumulators of the plurality of fuel accumulators. At least one of the plurality of fuel accumulators may also be in fluid communication with the pump. The fuel system may further have a plurality of flow limiters. Each of the plurality of flow limiters may be disposed between an associated fuel accumulator of the plurality of fuel accumulators and an associated fuel injector of the plurality of fuel injectors.Type: GrantFiled: June 25, 2010Date of Patent: January 7, 2014Assignee: Caterpillar Inc.Inventors: Michael D. Gerstner, Kenneth C. Adams, Benjamin R. Tower, Bharath Chandrashekar, Zhenyu Li
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Patent number: 8602321Abstract: The invention relates to a ball valve for adjusting a flow of a fluid medium. The ball valve includes a valve seat and a rounded closing element, in particular a valve ball. Furthermore, the ball valve has an inlet with a choke valve and one diffuser arranged between the choke valve and the valve seat. The diffuser includes a constriction on the side facing the valve seat.Type: GrantFiled: January 3, 2008Date of Patent: December 10, 2013Assignee: Robert Bosch GmbHInventors: Gerhard Girlinger, Frank Traxel, Roland Mitter
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Patent number: 8573186Abstract: The invention relates to an injector for injecting fuel into combustion chambers of internal combustion engines. According to the invention, a valve seat of a control valve is designed as a flat seat that has a planar valve seat surface. A circumferential edge located on the face of a sleeve of the control valve rests on the planar valve seat surface when the control valve is closed.Type: GrantFiled: September 12, 2007Date of Patent: November 5, 2013Assignee: Robert Bosch GmbHInventors: Andreas Rettich, Friedrich Boecking
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Patent number: 8544767Abstract: A fuel injection device has therein a recovery channel provided in a first valve body, and a fuel channel provided in the first valve body and a second valve body. The fuel channel is opened by openings at a first end surface of the first valve body and a second end surface of the second valve body. One of the first end surface and the second end surface is provided with an end surface groove connected to the recovery channel. In the fuel injection device, the end surface groove is provided to enclose at least a part of the opening and is separated from the opening by a clearance, and one of the first valve body and the second valve body has a side surface groove extending in a circumferential direction at an outer periphery of the one of the first valve body and the second valve body.Type: GrantFiled: July 11, 2011Date of Patent: October 1, 2013Assignee: Denso CorporationInventors: Naofumi Adachi, Tsukasa Yamashita
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Patent number: 8516994Abstract: A fuel injection system is described, and which has an upstream portion and a downstream portion. The upstream portion includes a source of fuel, the fuel inlet of a fuel injection servo or flow regulator, and a first fuel flow line connected in fuel flowing relation relative to the source of fuel and to the fuel inlet of the fuel injection servo. The downstream portion includes a flow divider, at least one fuel outlet of the fuel injection servo, and a second fuel flow line connected in fuel flowing relation relative to the flow divider and the fuel outlet of the fuel injection servo. A fuel accumulator pressure damper is mounted in fuel flowing relation relative to the downstream portion of the fuel injection system so as to substantially reduce standing waves in the fuel injection system.Type: GrantFiled: May 11, 2010Date of Patent: August 27, 2013Assignee: Turn and Bank Holdings, Inc.Inventor: Jim Gregoire
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Patent number: 8511284Abstract: A fuel supply apparatus of an internal combustion engine is provided which can discharge air bubbles or air from within fuel supply paths while increasing pressure within a common rail up to a predetermined pressure level before a start of the internal combustion engine, can reduce a period of time of cranking from when an ignition switch is switched on and which can reduce noise that occurs when the air bubbles or air are being discharged. The fuel supply apparatus is provided with a flow rate control valve that adjusts a flow rate of fuel supplied to the common rail and a pressure control valve that reduces the pressure within the common rail.Type: GrantFiled: August 1, 2008Date of Patent: August 20, 2013Assignee: Bosch CorporationInventors: Hiroshi Matsuki, Hirotaka Kaneko, Muneyuki Yoshida
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Patent number: 8504277Abstract: In a method for determining a control parameter for a fuel injector of an internal combustion engine, the problem of enabling more precise determination of the control parameter, even if the fuel pressure (FUP) present on the fuel injector varies, is solved in that the fuel pressure (FUP) present on the fuel injector during the injection (I1, I2, I1?, I1?) is concluded while allowing for the time of the fuel pressure value detection and/or the crankshaft angle position of the internal combustion engine during the detection of the fuel pressure value, and that the control parameter is determined based on the fuel pressure (FUP) that was concluded.Type: GrantFiled: May 23, 2008Date of Patent: August 6, 2013Assignee: Continental Automotive GmbHInventors: Dirk Baranowski, Klaus Hengl-Betz, Thorsten Lauer
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Patent number: 8460422Abstract: An exhaust aftertreatment system includes a combustion head housing defining a plenum, and an air supply system including an air conduit fluidly connected with the plenum. The aftertreatment system further includes a fuel system having a fuel supply housing defining a fuel passage, a control valve positioned within the fuel passage and a fuel filtering mechanism having a filtering component positioned within the fuel passage fluidly between a fuel inlet and the control valve. A nozzle is mounted within the combustion head housing and defines a nozzle outlet, and a fuel conduit extends between the fuel supply housing and the combustion head housing. The control valve includes an open state in which the fuel system defines an unobstructed fuel flow path from the fuel inlet to the nozzle outlet.Type: GrantFiled: September 17, 2010Date of Patent: June 11, 2013Assignee: Caterpillar Inc.Inventor: Thomas R. McClure
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Patent number: 8459232Abstract: An injection system for injecting fuel has an actuator, a pilot valve with a valve mushroom, and a supply throttle. The control chamber encompasses a control piston, a first discharge throttle, a first sealing edge for forming a first sealing seat along with the valve mushroom, a second sealing edge of a piston chamber with a valve piston, the second sealing edge forming a second sealing seat along with the valve piston during a maximum actuator working lift for sealing the piston chamber and the valve chamber from each other; and a second discharge throttle connecting the piston chamber to the low-pressure zone between the first and the second sealing edge, wherein d1>d2>d3, d1 are the minimum diameter of the first discharge throttle, d2 being the minimum diameter of the second discharge throttle, and d3 being the minimum diameter of the supply throttle.Type: GrantFiled: August 4, 2008Date of Patent: June 11, 2013Assignee: Continental Automotive GmbHInventors: Fredrik Borchsenius, Uwe Jung, Grit Krüger, Eberhard Kull, Volker Mohr
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Publication number: 20130104853Abstract: A flow limiter for a fuel system is provided. The flow limiter includes a self-contained portion that enables testing of the flow limiter prior to assembly into a fuel system. A housing of the flow limiter is arranged to provide reduced or no pressure differential across a wall of the housing, permitting the housing to be reduced in size and thickness and providing improved consistency of operation.Type: ApplicationFiled: November 1, 2012Publication date: May 2, 2013Applicant: CUMMINS INC.Inventor: Cummins INC.
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Patent number: 8402947Abstract: A fuel rail includes an elongated tube having an inlet and a plurality of outlets. The elongated tube defines a fuel passageway for directing fuel toward the plurality of outlets. The fuel rail also includes a plurality of immovable baffles positioned within the elongated tube to divide the fuel passageway into a plurality of chambers such that each outlet is positioned in one of the plurality of chambers. The plurality of baffles restricts fluid flow between adjacent chambers. A majority of the plurality of outlets are located essentially at an acoustic node of each corresponding chamber to reduce noise generated by the fuel rail.Type: GrantFiled: June 22, 2012Date of Patent: March 26, 2013Assignee: Robert Bosch GmbHInventors: Venkatesh Kannan, Jason Schwanke, Chad D. Ormsbee, John P. Casari
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Patent number: 8342424Abstract: A needle is received in a nozzle body and is adapted to reciprocate relative to an injection hole to open and close the injection hole. A pressure chamber receives the fuel and exerts a pressure against the needle in an opening direction away from the injection hole upon increasing of the pressure of the fuel in the pressure chamber. A damper arrangement is actuated upon increasing of the pressure in the pressure chamber to alleviate a change in the pressure in the pressure chamber. A pressurizing piston reciprocates to increase and decrease the pressure of the fuel in the pressure chamber.Type: GrantFiled: July 8, 2009Date of Patent: January 1, 2013Assignees: Denso Corporation, Nippon Soken, Inc.Inventors: Takashi Suzuki, Kouichi Mochizuki
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Patent number: 8297254Abstract: A system for safe storage and efficient utilization of a variety of fuel selections that range in composition and phase from cryogenic mixtures of solids and liquids to elevated temperature gases is provided for unique applications with various types of heat engines and fuel cells including hybridized combinations.Type: GrantFiled: October 19, 2009Date of Patent: October 30, 2012Assignee: McAlister Technologies, LLCInventor: Roy McAlister
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Patent number: 8251047Abstract: A fuel rail includes an elongated tube having an inlet and a plurality of outlets. The elongated tube defines a fuel passageway for directing fuel toward the plurality of outlets. The fuel rail also includes a plurality of baffles positioned within the elongated tube to divide the fuel passageway into a plurality of chambers such that each outlet is positioned in one of the plurality of chambers. The plurality of baffles restricts fluid flow between adjacent chambers. A majority of the plurality of outlets are located essentially at an acoustic node of each corresponding chamber to reduce noise generated by the fuel rail.Type: GrantFiled: August 27, 2010Date of Patent: August 28, 2012Assignee: Robert Bosch GmbHInventors: Venkatesh Kannan, Jason Schwanke, Chad D. Ormsbee, John P. Casari
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Patent number: 8215100Abstract: An exhaust treatment device for a combustion system is disclosed. The exhaust treatment device may have a housing, and an injector disposed within the housing to deliver an injection fluid into a flow of exhaust. The exhaust treatment device may also have at least one fluid supply passage that is disposed within the housing and being in fluid communication with the injector to supply the injector with injection fluid. The exhaust treatment device may further have at least one purge passage disposed within the housing and in fluid communication with the injector to supply the injector with a purge fluid. The exhaust treatment device may additionally have a first valve element that is mounted to the housing and disposed at an entrance of the at least one purge passage The first valve element may be configured to provide a unidirectional flow of purge fluid to the at least one purge passage.Type: GrantFiled: February 27, 2008Date of Patent: July 10, 2012Assignee: Caterpillar Inc.Inventors: Robert L. Miller, Stephen M. Wiley, Glenn B. Cox, Thomas Randall McClure
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Patent number: 8196567Abstract: Fuel is evacuated from a fuel rail by directing liquid fuel from the fuel rail to a fuel tank and then by directing gaseous fuel from the fuel rail to a fuel vapor canister.Type: GrantFiled: May 28, 2010Date of Patent: June 12, 2012Assignee: Ford Global Technologies, LLCInventors: Ross Dykstra Pursifull, Joseph Norman Ulrey
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Patent number: 8196565Abstract: A fluid injector assembly has a fluid injector (14) with a fluid inlet portion (16), a fluid injector cup (18) with an inner surface (30), an outer surface (28) and a heating device (32). The fluid inlet portion (16) of the fluid injector (14) has a sealing ring (26) being arranged and designed to sealingly engage the inner surface (30) of the fluid injector cup (18). The fluid injector cup (18) is designed to couple the heating device (32) thermally to the sealing ring (26) of the inlet portion (16) and to couple the fluid inlet portion (16) mechanically.Type: GrantFiled: July 2, 2009Date of Patent: June 12, 2012Assignee: Continental Automotive GmbHInventors: Edoardo Giorgetti, Daniel Marc
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Patent number: 8161945Abstract: A fuel injection system includes a fuel supply rail having a supply opening. A fuel injector is coupled to the fuel supply rail and configured to control the delivery of fuel from the fuel supply rail through the supply opening. A noise filtering device engages an upstream end of the fuel injector. The noise filtering device has a projecting portion extending at least partially into the supply opening along an axis, and the noise filtering device defines a restriction passage for directing fuel from the supply rail into the fuel injector. A face seal is established at a transverse face adjacent the supply opening.Type: GrantFiled: September 12, 2011Date of Patent: April 24, 2012Assignee: Robert Bosch GmbHInventors: Norbert Mueller, Venkatesh Kannan, Markus Friedrich, Jason L. Kramer
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Patent number: 8113178Abstract: An apparatus for controlling the quantity of fuel over a common rail diesel engine includes a wave speed correction map correcting a wave speed and a time corrector, a first adder multiplying the corrected wave speed by an injection time difference, a base correction map using an output of the first adder and a former injection quantity as input variables, an amplitude map using a following injection quantity and a rail pressure as input variables, and a second adder multiplying a base correction map value of the base correction map by an amplitude map value of the amplitude map, and outputting a finally corrected value of the fuel quantity.Type: GrantFiled: June 25, 2009Date of Patent: February 14, 2012Assignee: Hyundai Motor CompanyInventor: Dong Won Park
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Patent number: 8113176Abstract: The invention relates to an injector for injecting fuel into combustion chambers. According to the invention, a valve piston of a control valve is provided with low pressure on both faces thereof. The valve piston is arranged in a valve chamber hydraulically connected to a control chamber and is guided inside a sleeve received in the valve chamber. The valve chamber contains a spring supported on one end against the sleeve and on the other end on the valve piston such that the spring presses the valve piston onto a valve seat and the sleeve onto an opposing bottom surface. The valve piston diameter inside the sleeve corresponds to the effective valve piston diameter at the valve seat.Type: GrantFiled: August 29, 2007Date of Patent: February 14, 2012Assignee: Robert Bosch GmbHInventors: Francois Rossignol, Stephan Amelang, Friedrich Howey, Olivier Charvet, Tony Dumont
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Patent number: 8113177Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.Type: GrantFiled: March 14, 2011Date of Patent: February 14, 2012Assignee: Hitachi, Ltd.Inventors: Masahiko Hayatani, Motoyuki Abe, Atsushi Sekine, Tohru Ishikawa
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Patent number: 8100109Abstract: A control device is for an in-cylinder injection engine that makes fuel have high pressure through a high pressure pump to supply fuel to an injector and then injects fuel directly into a cylinder from the injector. The control device includes a fuel pressure detecting device for detecting pressure of fuel supplied to the injector, a target fuel pressure setting device for setting a target fuel pressure according to an engine operating state, a fuel pressure control device for feedback-controlling a fuel discharge amount from the pump such that fuel pressure detected by the detecting device accords with the target fuel pressure, a stop predicting device for determining whether the engine is about to stop, and a target fuel pressure gradual change device for decreasing the target fuel pressure gradually to a final target fuel pressure lower than normal, when it is determined that the engine is about to stop.Type: GrantFiled: October 28, 2009Date of Patent: January 24, 2012Assignee: Denso CorporationInventor: Shingo Nakata
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Publication number: 20120006297Abstract: This disclosure provides a fuel system for supplying fuel to an internal combustion engine, an internal combustion engine that includes such a fuel system, a connector for connecting a single-walled high pressure common rail to a double-walled fuel line segment, and a fluid containment system. Each embodiment includes drain plumbing having a leakage drain connector that can be used to provide an interface between a single-walled high pressure common rail and a double-walled high pressure fuel line segment, and also provide part of a low pressure passage fluidly connected with a low pressure passage of the double-walled high pressure fuel line segment. The drain plumbing also can provide an interface with a low pressure fuel drain line fluidly coupled to a leakage detector.Type: ApplicationFiled: May 8, 2011Publication date: January 12, 2012Applicant: CUMMINS INTELLECTUAL PROPERTIES, INC.Inventors: Joseph WORTHINGTON, Thomas O. HAHN, Vijay SONAWANE, Prasad KHEDEKAR, Dave RICHTER, Josh KNIGHT
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Patent number: 8087400Abstract: An injection valve has a magnetic actuator and an injector needle able to be moved axially by the magnetic actuator. To meter a fluid by the injection valve the magnetic actuator is activated for an individual metering process with at least one actuation signal with a first or second signal waveform. The two actuation signals differ from one another in that, on activation of the magnetic actuator by the actuation signal with the first signal waveform, less energy is transmitted to a magnet unit of the magnetic actuator than during activation of the magnetic actuator by the actuation signal with the second signal waveform. The magnetic actuator is activated by the actuation signal with the second signal waveform if an activation of the magnetic actuator by the actuation signal with the first signal waveform leads to an undesired premature closure of the injector needle.Type: GrantFiled: September 22, 2008Date of Patent: January 3, 2012Assignee: Continental Automotive GmbHInventors: Erwin Achleitner, Dirk Baranowski, Franz Kunz
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Patent number: 8069840Abstract: The invention relates to an injector for injecting fuel into combustion chambers of internal combustion engines, in particular a common rail injector. The injector has a high-pressure region and a valve element which is axially adjustable between a closed position and an open position in which the flow of fuel is enabled. According to the invention, it is provided that the valve element includes a first partial element and at least one separate second partial element, which partial elements are hydraulically coupled to one another by a coupler chamber. The coupler chamber is hydraulically connected only in one axial direction to the high-pressure region of the injector.Type: GrantFiled: December 6, 2007Date of Patent: December 6, 2011Assignee: Robert Bosch GmbHInventor: Hans-Christoph Magel
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Patent number: 8037868Abstract: A fuel injection system includes a fuel supply rail having a supply opening. A fuel injector is coupled to the fuel supply rail and configured to control the delivery of fuel from the fuel supply rail through the supply opening. A noise filtering device engages an upstream end of the fuel injector. The noise filtering device has a projecting portion extending at least partially into the supply opening along an axis, and the noise filtering device defines a restriction passage for directing fuel from the supply rail into the fuel injector. A face seal is established at a transverse face adjacent the supply opening.Type: GrantFiled: April 11, 2011Date of Patent: October 18, 2011Assignee: Robert Bosch GmbHInventors: Venkatesh Kannan, Michael U. Fischer
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Patent number: 8033269Abstract: To provide a fuel injection device capable of reducing the amount of fuel discharging to the outside. The fuel injection device is provided with the nozzle body, the injection control valve, and the close assistance piston. In the nozzle body, the first fuel chamber and the nozzle valve close chamber are formed. The injection control valve advances to a first position, thereby allowing the first fuel passage to be communicated with the first fuel chamber and blocking access from the first fuel chamber to the third fuel passage, and the injection control valve retreats to a second position, thereby blocking access from the first fuel passage to the first fuel chamber and allowing the first fuel chamber to be communicated with the third fuel passage. The close assistance piston prevents fuel in the first fuel chamber from discharging to the outside of the fuel injection device.Type: GrantFiled: June 12, 2009Date of Patent: October 11, 2011Assignee: Honda Motor Co., Ltd.Inventors: Junichiro Ishimura, Tomoyuki Hashimoto
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Patent number: 8002205Abstract: An injection nozzle for an internal combustion engine has a valve member (10) with a seating line (112) defining a seat diameter, the seating line (112) being engageable with a seating surface (14) to control fuel injection by the nozzle, in use. The seating line is defined by an annular ridge (40, 44, 46), integrally formed with the valve needle (10), so as to reduce variations in the seat diameter which would otherwise arise at manufacture due to contact between the valve needle (10) and the seating surface (14) in regions other than at the seating line. The invention provides an advantage in manufacture as repeatability and consistency of the geometry, and in particular the effective seat diameter, of nozzle products is improved.Type: GrantFiled: October 6, 2004Date of Patent: August 23, 2011Inventors: Malcolm Lambert, Andrew Limmer, Mark Norman, Michael Mcloone
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Patent number: 7987835Abstract: The invention relates to a fuel injector, in particular a common rail injector, for injecting fuel into a combustion chamber of an internal combustion engine. The fuel injector has an injection valve element which is adjustable between a closing position and an opening position and which is switchable by means of a control valve. The control valve has a sleevelike control valve element that is adjustable along an adjustment axis and in its closing position rests sealingly on a control valve seat element. According to the invention, it is provided that the control valve seat element is disposed movably relative to the adjustment axis of the control valve element.Type: GrantFiled: May 4, 2009Date of Patent: August 2, 2011Inventor: Nadja Eisenmenger
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Patent number: 7984706Abstract: A method and system controls motion of an armature 112 of a fuel injector 100. The armature moves between an open coil 118 and a close coil 116 of the injector. Acceleration current of a certain polarity is applied to the open coil 118 with the armature disposed at the close coil 116. De-latching current of a polarity opposite of the certain polarity is applied to the close coil 116 to release magnetic latch on the armature thereby accelerating movement of the armature towards the open coil 118. Deceleration current is applied the close coil 116 thereby decelerating the armature prior to reaching the open coil. Latching current of the certain polarity is applied to the open coil 118 prior to or just after impact of the armature 112 with the open coil 118 to magnetically latch the armature to the open coil 118 thereby reducing bounce of the armature at impact.Type: GrantFiled: October 22, 2008Date of Patent: July 26, 2011Assignee: Continental Automotive Systems US, Inc.Inventors: Robert T. Stewart, Jr., Ricky Lee Dynes, Benjamin Daniel Wisdom
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Patent number: 7980224Abstract: A fuel system includes a plurality of fuel injectors fluidly connected to a common rail. Each of the fuel injectors has at least one body component and includes an intensifier control valve for controlling movement of an intensifier piston, a needle control valve for controlling movement of a needle valve member, and exactly one electrical actuator coupled with the intensifier control valve and the needle control valve via a coupling linkage. The intensifier control valve and the needle control valve each include a valve member that is movable with respect to a valve seat. The electrical actuator includes an intermediate position during which the valve member of one of the intensifier control valve and the needle control valve is in contact with the respective valve seat, and the valve member of the other of the intensifier control valve and the needle control valve is out of contact with the respective valve seat.Type: GrantFiled: February 3, 2009Date of Patent: July 19, 2011Assignee: Caterpillar Inc.Inventors: Stephen R. Lewis, Bradley E. Bartley, Avinash R. Manubolu, Shriprasad G. Lakhapati, Dianqi Fang, Michael Gerstner, Christopher D. Hanson, Jeffrey M. Mullinix
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Publication number: 20110155103Abstract: In a fuel injection valve, it is intended to enhance valve-closing responsivity while maintaining durability (anti wear property) of a collision portion between a stationary core and a movable core and valve-opening responsivity. An annular end face 106A of the movable core 106 in the fuel injection valve is provided with a collision portion 106C that collides to a stationary core 107 when the movable core is magnetically attracted toward the stationary core side and a non-collision portion that keeps a fluid gap between both cores at an area of an outer side or an inner side from the collision portion. The annular end faces of the stationary core and the movable core are coated with platings 30, 31 having anti wear property, and at least one of the platings of the stationary core and the movable core is formed in such a manner that the thickness thereof at the collision portion 106C is to be thicker and the thickness thereof at the non-collision portion is to be thinner.Type: ApplicationFiled: July 29, 2009Publication date: June 30, 2011Applicant: Hitachi Automotive Systems, Ltd.Inventors: Motoyuki Abe, Masahiko Hayatani, Tohru Ishikawa, Takehiko Kowatari, Atsushi Takaoku, Yasuo Namaizawa, Yusuke Irino
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Patent number: 7968167Abstract: A coated seal for sealing parts in a vehicle engine is disclosed herein. The seal includes a seal body portion including glass fiber-filled polytetrafluoroethylene, carbon-filled polytetrafluoroethylene, molybdenum disulfide-filled polytetrafluoroethylene, bronze-filled polytetrafluoroethylene or combinations thereof; and a coating portion including either expanded polytetrafluoroethylene, carbon-filled polytetrafluoroethylene, or combinations thereof. A method of using a coated seal in a vehicle engine is also disclosed herein. A system to achieve decreased friction, decreased noise, and improved wear in injector seals in a vehicle engine is also disclosed herein.Type: GrantFiled: October 22, 2009Date of Patent: June 28, 2011Assignee: GM Global Technology Operations LLCInventors: Yue Qi, Pui-Kei Yuen
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Patent number: 7946274Abstract: An electromagnetic fuel injection valve comprising: a metallic cylindrical-shaped vessel provided at a tip end thereof with a fuel injection port, the other end thereof being closed by a stationary core provided centrally thereof with a through-hole; a movable member arranged between the stationary core and the fuel injection port and provided at a tip end thereof with a valve element, which opens and closes the fuel injection port, a maximum outside diameter of the movable member being smaller than a minimum inside diameter of the through-hole; and an electromagnetic drive mechanism that reciprocates the movable member.Type: GrantFiled: February 17, 2010Date of Patent: May 24, 2011Assignee: Hitachi, Ltd.Inventors: Masahiko Hayatani, Motoyuki Abe, Atsushi Sekine, Tohru Ishikawa
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Patent number: 7946509Abstract: The invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine. The injector is actuated by an actuator and is connected to a fuel supply line via which fuel is supplied under system pressure. At least one injection opening can be opened or closed off by an injection valve member, which is activated by a control piston via a control chamber to which the control piston and a piston section of the injection valve member are exposed with respective pressure faces. The control piston is a valve piston of a control valve. The pressure face of the control piston and the pressure face of the piston section of the injection valve member are exposed to the control chamber at the same side. The control piston and the piston section of the injection valve member also enclose a further control chamber which is connected to a fuel return line when the control valve is open and to the fuel supply line when the control valve is closed.Type: GrantFiled: June 15, 2007Date of Patent: May 24, 2011Assignee: Robert Bosch GmbHInventor: Friedrich Boecking
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Patent number: 7942132Abstract: A fuel injection system includes a fuel supply rail, a fuel injector configured to control the delivery of fuel from the fuel supply rail, and a noise filtering device engaging an upstream end of the fuel injector and/or positioned at least partially within the fuel injector. The noise filtering device defines a fuel passage configured to direct fuel from the fuel supply rail into the fuel injector. The noise filtering device can include one or more of several features including a pocket, a wrap-around shape to conform to the inlet end of the fuel injector, a face-sealing portion, a compression section, and a plurality of parallel restriction passages.Type: GrantFiled: July 8, 2009Date of Patent: May 17, 2011Assignee: Robert Bosch GmbHInventors: Venkatesh Kannan, William G. Klisz, John P. Casari, Jason L. Kramer
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Patent number: 7942130Abstract: Vapor reducing structure (25) is constructed and arranged to be associated with a fuel pressure regulator (18) of a fuel system (10?) of a vehicle. The pressure regulator has an outlet (28) for fuel that is in excess of fuel required by an engine of the vehicle. The reducing structure includes a fuel accumulator (26) associated with an outlet of the pressure regulator defining a volume in which fuel exiting the outlet of the regulator can accumulate. Flow restricting structure (30?) is associated with the accumulator and is constructed and arranged to create sufficient back-pressure to eliminate vaporization of the fuel exiting the outlet of the pressure regulator.Type: GrantFiled: March 17, 2008Date of Patent: May 17, 2011Assignee: Continental Automotive Systems US, Inc.Inventors: Paul F. Briggs, Jeffery J. Milton
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Patent number: 7931007Abstract: The fuel-injection device is characterized by an especially low-noise design. The fuel-injection device includes at least one fuel injector and a fuel rail having at least one pipe connection, the fuel injector being introduced into a receiving bore of the pipe connection, and the fuel rail having a discharge opening to supply fuel to the fuel injector. Provided between the fuel injector and the fuel rail is a pressure-wave guide connecting both, in such a way such that dynamic pressure fluctuations in the fuel injector are able to be routed largely past the volume of the receiving bore of the pipe connection. The fuel-injection device is especially suitable for the direct injection of fuel into a combustion chamber of a mixture-compressing internal combustion engine having external ignition, but it is also suitable for the injection of fuel into an intake manifold.Type: GrantFiled: December 7, 2007Date of Patent: April 26, 2011Assignee: Robert Bosch GmbHInventors: Michael Fischer, Ulrich Fischer, Peter Lang
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Patent number: 7900604Abstract: A dampening stop pin that reduces a needle velocity at the time when the needle valve of a fuel injector is about to be seated in a closed position. A gap between a bottom surface of the stop-pin flange and a sealing seat of a nozzle is provided to compress the fuel trapped therein to form a fuel cushion that dampens the closing motion of the needle. Moreover, a diametrical clearance between an outer circumferential edge of the flange and an inner surface of a needle spring cage must be sized to prevent undesired high pressure from building up in the gap by venting a quantity of compressed fuel while still permitting the fuel cushion to dampen the closing force of the needle.Type: GrantFiled: June 15, 2006Date of Patent: March 8, 2011Assignee: Siemens Diesel Systems TechnologyInventor: Olaf Enke
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Patent number: 7896263Abstract: A fluid injector has an actuator unit, a cartridge, which has a recess, which on one of its open ends forms an injection nozzle and takes in a needle. The needle has a first and a second part (15, 17). The first part (15) is inserted into the recess and closes or opens the injection nozzle depending on the position of the first part (15). The second part (17) is coupled to the actuator unit on one of its free ends and is coupled to the first part (15) via a coupling unit. The coupling unit is arranged in positive connection to the first part (15) and is joined to the second part. In that way the material for the first part may be chosen for being highly wear resistant. On the other hand the material of the second part (17) may be chosen for being well-suited for a joining process.Type: GrantFiled: January 18, 2005Date of Patent: March 1, 2011Assignee: Continental Automotive Italy S.p.A.Inventors: Luca Matteucci, Raffaele Squarcini
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Patent number: 7856966Abstract: When an estimated alcohol concentration is higher than a specified concentration, an operation time of an engine is cumulated to obtain an alcohol cumulative operating time (ACOT). When the ACOT exceeds a specified time and a feedback correction quantity of a fuel injection quantity exceeds a specified quantity, a computer estimates that a deposit quantity exceeds a permissible value to notify the driver to refuel a fuel tank with gasoline. After fueling with gasoline, a cleaning agent contained in the gasoline removes the deposit accumulated on a fuel injector. As a result, a variation in fuel injection quantity due to deposit on the fuel injector can be avoided, and a deterioration in exhaust gas emission and drivability can be avoided.Type: GrantFiled: January 14, 2009Date of Patent: December 28, 2010Assignee: Denso CorporationInventor: Soichi Saitoh
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Patent number: 7827962Abstract: The invention relates to a fuel injection system for a multi-cylinder internal combustion engine having a first high-pressure accumulator and having a second high-pressure accumulator. The fuel injection system also has a high-pressure pump, wherein the first and the second high-pressure accumulators have a number of ports for injector supply lines corresponding to the number of cylinders of the internal combustion engine. A damping volume for damping pressure pulsations between the high-pressure accumulators and the high-pressure pump is integrated into one of the high-pressure accumulators.Type: GrantFiled: November 30, 2006Date of Patent: November 9, 2010Assignee: Robert Bosch GmbHInventors: Christoph Weizenauer, Jochen Walther, Markus Degn, Gernot Payer, Sven Voelter
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Patent number: 7822534Abstract: A fuel supply device (30) for an engine (1) pressurizes the fuel drawn up from a fuel tank (31) by the low-pressure fuel pump (32) and stores it in a delivery pipe (34), and injects the fuel stored in the delivery pipe (34) from an injector (35). The fuel supply device (30) includes a return passageway (50) connecting the delivery pipe (34) and the fuel tank (31), and a relief valve (51) that is provided on the return passageway (50) and that is capable of being switched between an open state for connecting the delivery pipe (34) and the fuel tank (31) in communication and a closed state for shutting off the delivery pipe (34) and the fuel tank (31) from each other in communication. An ECU (60) switches the relief valve (51) to the open state and operates the low-pressure fuel pump (32), if a predetermined stop condition for stopping the engine (1) is satisfied.Type: GrantFiled: February 26, 2007Date of Patent: October 26, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventor: Takuji Matsubara
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Patent number: 7814890Abstract: An injector for fuel includes a passage for receiving fuel at an above-atmospheric first pressure, a pressure amplifier and an injection valve which is settable in an open position and a closed position. The injection valve includes a piston element, a closing chamber and an opening chamber. To inject fuel, the pressure amplifier generates a higher second fuel pressure in the opening chamber so that the valve element moves towards an open position and fuel is injected. To end injection of fuel, the high pressure in the opening chamber is reduced and the closing chamber is connected to the fuel source at the first pressure so that the valve is moved towards the closed position by a combined force created by the first pressure and the spring.Type: GrantFiled: April 4, 2007Date of Patent: October 19, 2010Assignee: Scania CV ABInventors: Vesa Hokkanen, Kim Kylström
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Patent number: 7784711Abstract: A fuel injector and servovalve for an internal combustion engine.Type: GrantFiled: January 31, 2008Date of Patent: August 31, 2010Assignee: C.R.F. Societa Consortile per AzioniInventors: Mario Ricco, Raffaele Ricco, Sergio Stucchi, Domenico Lepore, Carlo Mazzarella