Having Flow Regulator* For Reciprocating Piston Engine Patents (Class 239/533.3)
  • Patent number: 10337478
    Abstract: A fuel injector includes a collar, which may be formed of a porous, sintered material, the collar being located around the needle and allowing a restricted fluid pathway, such as orifices through the collar, between first and second volumes of fuel, the collar being located in a section of the nozzle body which has a greater cross-sectional area than the rest of the bore.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: July 2, 2019
    Assignee: DELPHI TECHNOLOGIES IP LIMITED
    Inventors: Ian Whyte, David J. Lane, Thomas Magill
  • Patent number: 10302054
    Abstract: A needle includes a first seal portion, which is formed at an end portion of the needle located on a side where an injection hole is placed, and a second seal portion, which is formed on a side of the first seal portion where a stationary core is placed. When a boundary between a first outer wall of the first seal portion and a second outer wall of the second seal portion is lifted away from or is seated against an inner wall, the injection hole is opened or closed. Thereby, a seat diameter of the boundary and the inner wall is stabilized, and a change in a fuel injection quantity caused by aging can be reduced. Furthermore, the first outer wall of the first seal portion is shaped into a form of a spherical surface.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: May 28, 2019
    Assignee: DENSO CORPORATION
    Inventor: Hiroki Kaneta
  • Patent number: 10041411
    Abstract: A fuel dosing device for a fuel injector of an aircraft turbomachine, including an opening, a movable member for sealing the opening, and elastic return, with the member able to be displaced under the effect of the fuel pressure. The device includes a first outlet communicating with a primary circuit of the injector as well as a second outlet communicating with a secondary circuit. In addition, it is designed such that up to a defined level of displacement of the sealing member, the latter allows the fuel coming from the opening to reach the first outlet and, only beyond the defined level of displacement, the member allows the fuel coming from the opening to reach the second outlet.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: August 7, 2018
    Assignee: SNECMA
    Inventors: Christophe Chabaille, Sebastien Loval
  • Patent number: 10001100
    Abstract: A valve assembly for a fluid injector for an internal combustion engine includes a valve body with a valve recess, a central longitudinal axis, and a first axial end and a second axial end with respect to the central longitudinal axis. A valve needle is axially moveable within the valve recess with respect to the central longitudinal axis. In concurrence with a seal seat area the valve needle prevents a fluid flow through at least one flow hole in its closing position and otherwise enables it. Furthermore, the injector comprises a sac volume step adjacent to the seal seat area forming a part of an inner surface of a wall of the valve body and a sac volume being designed as one end of the valve recess and being limited by a further part of the inner surface of the wall of the valve body.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: June 19, 2018
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Antonio Agresta, Nicola Canesi, Luca Gestri, Marco Saliu, Luca Matteucci
  • Patent number: 9915215
    Abstract: A fuel injection system is provided. The fuel injection system can have a fuel injector having a check valve with a plurality of fuel output ports, and a fuel injector body with an outer surface and an inner surface. The fuel injector body defines an inner volume to accommodate bi-directional movement of the check valve. The fuel injector body includes at least a first row of injection ports and a second row of injection ports extending from the inner surface to the outer surface. The check valve is bi-directionally controllable in the inner volume, during a single cycle, to output from the fuel injector body any one of a plurality of predefined pulse injection patterns.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: March 13, 2018
    Assignee: Caterpillar Inc.
    Inventor: Bobby John
  • Patent number: 9803578
    Abstract: An injection valve has a moveable nozzle needle that controls a dosing of fluid and a solid-state actuator that actuates the nozzle needle. To operate the injection valve, values of a characteristic for a load state of the actuator are detected at a predetermined sampling rate. A start reference time and end reference time are determined correlating in chronological terms to an operating phase in which the solid-state actuator is discharged to a predetermined reference state by absorbing the energy in a discharging resistor. A correction reference value is determined based on a detected value of the characteristic correlating to an end of the operating phase, and a predetermined reference value. A correction value pattern is determined based on the end reference time, the start reference time, and the correction reference value. The detected values of the characteristic for the load state are determined based on the correction value pattern.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: October 31, 2017
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Peter Matthias Russe, Anselm Schwarte
  • Patent number: 9556843
    Abstract: A fuel injection nozzle includes: a nozzle body having a plurality of injection holes; and a needle accommodated in the nozzle body to inject a DME fuel containing dimethyl ether as a main component. The nozzle body has a seat part to which the needle seated or from which the needle separated, and a tip end chamber arranged downstream of the seat part in a flow of the DME fuel to communicate with the plurality of injection holes. The DME fuel in the tip end chamber is heated with combustion heat in a combustion chamber of an internal combustion engine to have a supercritical state.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: January 31, 2017
    Assignee: DENSO CORPORATION
    Inventor: Masaaki Kato
  • Patent number: 9441590
    Abstract: The invention relates to a fuel injection valve for injecting fuel into a combustion chamber of an internal combustion engine, having a nozzle needle (1) which is guided, such that it can perform a stroke movement, in a central bore (2) of a nozzle body (3) in order to open up or close off at least one injection opening (4), wherein the nozzle needle (1) interacts, by means of an encircling sealing region (5) formed on the combustion-chamber-side end thereof, with a sealing seat (6) that runs conically and is formed on the combustion-chamber-side end of the nozzle body (3). According to the invention, the sealing seat (6) that runs conically has an opening angle (?1) of between 30° and 50°, preferably of between 40° and 50°.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: September 13, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Wilhelm Christ, Gerhard Suenderhauf, Michael Leukart, Katja Grothe
  • Patent number: 9341134
    Abstract: A control apparatus for an internal combustion engine includes a fuel injection valve having a nozzle body that includes a fuel receiving part provided at a downstream side of a seat part with which a seat contact part comes into contact, and a plurality of nozzle holes. The control apparatus executes one or a plurality of small injections during one cycle in addition to main injection. Further, the control apparatus increases fuel injection amount of a first small injection at the current cycle at the time of low load operation while decreases the fuel injection amount of the first small injection at the time of high load operation, when post injection has not been executed in the last cycle and the small injection is executed first at the current cycle in a case in which a variation in the learned value for fuel injection amount is present.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: May 17, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Masato Ikemoto
  • Patent number: 9341152
    Abstract: The present disclosure is directed to integrated injector/igniters providing efficient injection, ignition, and complete combustion of various types of fuels. One example of such an injectors/igniter can include a body having a base portion opposite a nozzle portion, and a fuel passageway extending from the base portion to the nozzle portion. A force generator and a first valve are carried by the base portion. The first valve is movable in response to actuation from the force generator to move between closed and open positions. The injector/igniter also includes a second valve at the nozzle portion that is deformable in response to pressure in the fuel passageway to deform between a closed position and an open position.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: May 17, 2016
    Assignee: McAlister Technologies, LLC
    Inventor: Roy Edward McAlister
  • Patent number: 9303582
    Abstract: The disclosure relates to a method for operating a fuel delivery device of an internal combustion engine, in which method an electromagnetic actuating device of a volume control valve is switched such as to set a delivery volume, wherein a control of the electromagnetic actuating device for moving an armature of the electromagnetic actuating device from a first position to a second position comprises at least three phases, wherein in a first phase a coil of the electromagnetic actuating device is permanently connected to a voltage, and wherein in a second phase the coil is periodically connected to the voltage with a first frequency and with a first duty factor, and wherein in a third phase the coil is periodically connected to the voltage with a second frequency and with a second duty factor.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: April 5, 2016
    Assignee: Robert Bosch GmbH
    Inventors: Uwe Richter, Joerg Kuempel
  • Patent number: 9255557
    Abstract: The present invention relates to a dual fuel injection valve apparatus provided with a hybrid nozzle for a diesel engine and a gas engine and an objective thereof is to provide a dual fuel injection valve apparatus provided with a hybrid nozzle for a diesel engine and a gas engine, being capable of respectively injecting two kinds of different fuels from one fuel injection valve by pressure of fuel and tension of a spring. In a fuel injection valve apparatus for injecting fuel to a cylinder of a diesel engine or a gas engine, the present invention sequentially injects, without mixing, two kinds of fuel through respective nozzle holes by pressure of the two kinds of fuel introduced to a fuel valve and tension of a needle spring.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: February 9, 2016
    Assignee: HYUNDAI HEAVY INDUSTRIES, CO., LTD.
    Inventors: Deuk-Jin Park, Ju-Tae Kim
  • Patent number: 9062642
    Abstract: A fuel injector is provided that creates variable spray characteristics to effectively reduce emissions, such as NOx emissions and particulate matter. The injector includes a nozzle valve element of the outwardly opening type including a fuel delivery passage and spray holes. The nozzle valve element is operable to move to a low lift position to cause fuel flowing from the spray holes to impinge on the injector body and to deflect toward the combustion chamber, and to move to a high lift position to cause fuel flowing from the spray holes to avoid impingement on injector body and flow in an obstructed manner directly into the combustion chamber. An annular chamber may be formed in the nozzle valve element adjacent the spray holes to receive fuel.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: June 23, 2015
    Assignee: Cummins Inc.
    Inventors: Lester L. Peters, David L. Buchanan
  • Patent number: 9038930
    Abstract: In a fuel injection device, a pressing surface of a pressing member presses an opening wall surface to interrupt communication between an inflow port and a pressure control chamber when communication between an outflow port and a return channel is made by a pressure control valve, and the pressing surface of the pressing member is displaced and separated from the opening wall surface to open the inflow port of the opening wall surface to the pressure control chamber when the communication between the outflow port and the return channel is interrupted by the pressure control valve. One of the pressing surface of the pressing member and the opening wall surface of the control body is provided with an inflow depressed portion and an outflow depressed portion partitioned from each other, and a depressed dimension of the inflow depressed portion is larger than a depressed dimension of the outflow depressed portion.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: May 26, 2015
    Assignee: DENSO CORPORATION
    Inventors: Yukihiro Fukuta, Tsukasa Yamashita
  • Patent number: 9022303
    Abstract: A fuel injection valve co-injects a liquid and a gaseous fuel into the combustion chamber of an internal combustion engine. A solid needle regulates the injection of liquid and gaseous fuels from a cavity in the fuel injection valve into the combustion chamber when the needle is lifted to its open position. In preferred embodiments, liquid fuel is metered and pressurized in an intensifier's cylinder provided within the valve body and the liquid fuel is delivered through a restricted flow passage into the cavity where it mixes with the gaseous fuel. The restricted flow passage can be formed by a small passage formed in the valve body or an annular passage between the needle and the valve body.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: May 5, 2015
    Assignee: Westport Power Inc.
    Inventors: David Mumford, Sandeep Munshi
  • Patent number: 8998104
    Abstract: An injection valve includes an injector component having an injector body including a recess hydraulically coupled to a high-pressure circuit of a fluid, and a nozzle needle moveably disposed injector body recess for preventing fluid flow through at least one injection opening in a closed position, and otherwise for releasing the fluid flow; an actuator unit disposed in the injector body recess and having an actuator element disposed in an actuator housing including an end face at an axial end facing the injection opening, which end face is mechanically coupled to a stage implemented in the injector body via a ring element disposed axially between the end face and the stage. At least two radial through passages are disposed opposite each other in the ring element, designed for hydraulically coupling between a ring interior disposed within the ring element and a ring exterior disposed outside of the ring element.
    Type: Grant
    Filed: November 3, 2010
    Date of Patent: April 7, 2015
    Assignee: Continental Automotive GmbH
    Inventors: Axel Burkhardt, Robert Kuchler, Joachim Wagner, Roland Wild
  • Publication number: 20150060576
    Abstract: A fuel injector includes a body, a main valve body, a sub valve body, an electric actuator, and a valve-opening force transmission mechanism. The body houses a main passage through which fuel flows to an injection, and a sub passage branched from the main passage and through which the fuel flows to the injection port. The main valve body opens or closes the main passage, and the sub valve body opens or closes the sub passage. The electric actuator applies a valve-opening force to the sub valve body. The valve-opening force transmission mechanism transmits the valve-opening force of the sub valve body to the main valve body to open the main valve body in a condition that a valve-opening stroke of the sub valve body is greater than or equal to a predetermined amount.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 5, 2015
    Inventors: Yoshiharu NONOYAMA, Hiroaki NAGATOMO
  • Patent number: 8919677
    Abstract: An injection nozzle comprising a nozzle body provided with a bore within which a valve needle is moveable, the valve needle being engageable with a valve seating to control fuel delivery through a set of nozzle outlets, said nozzle outlets including respective entry openings defined in a wall of a sac volume of the nozzle body, wherein the valve needle includes a first valve region, a second valve region and a seat region defined by a transition between the first and second valve regions which seats against the valve seating when the nozzle is in a non-injecting state. The valve needle comprises a third valve region adjacent the second valve region, the third valve region having an outer surface defining a curved profile, the end of the outer surface terminating substantially in alignment with the entry openings when the valve needle is engaged with the valve seating.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: December 30, 2014
    Assignee: Delphi International Operations Luxembourg S.A.R.L.
    Inventors: Cecilia C. E. Soteriou, Marion L. Balin
  • Patent number: 8919675
    Abstract: At the downstream-side face of an injection hole plate, a plurality of concaves are arranged corresponding to a plurality of injection holes; at least part of an injection hole outlet opens at the plain of the concave; the rest of the outlet opens at the downstream side face of the injection hole plate or contacts the inner surface of the concave. In a flow path formed by the injection hole, there is provided a cylindrical portion, whose cross section is the radially minimum cross section of the injection hole, from the upstream side face of the injection hole plate to the plain of the concave. Where D1 denotes the diameter of the injection hole and D2 denotes the diameter of the concave or the diameter of the concave in the circumferential direction of the virtual circle, the relationship 1.1<(D2/D1)<3.0 is satisfied.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: December 30, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yukitaka Sakata, Naoya Hashii, Kyosuke Watanabe, Tsuyoshi Munezane
  • Patent number: 8899500
    Abstract: A gas fuel injection valve is provided in which a single nozzle member (11) is fixedly provided in a front end part of a valve housing (2), and this nozzle member (11) has formed therein a valve seat (13), a valve hole (45) extending through a central part of the valve seat (13), a throttle hole (46) having a smaller diameter than that of the valve hole (45) and communicating with an outlet of the valve hole (45), and a nozzle hole (48) having a larger diameter than that of the throttle hole (46) and communicating with an outlet of the throttle hole (46), wherein when an internal diameter of the throttle hole (46) is D1, a length of the hole (46) is L1, an internal diameter of the nozzle hole (48) is D2, and a length of the nozzle hole (48) is L2, L1/D1>1??(1) 1<D2/D1?1.2??(2) the above expressions (1) and (2) are satisfied.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: December 2, 2014
    Assignee: Keihin Corporation
    Inventors: Toshinori Kuzuma, Takashi Yoshida, Wataru Sato, Yoji Nakajima
  • Patent number: 8864054
    Abstract: The invention relates to a fuel injector and, in particular, to a common-rail injector for injecting fuel into a combustion chamber of an internal combustion engine with a multi-part injection valve element, which can be adjusted between an open position and a closed position. A first part and a second part of the injection valve element are coupled to one another via a hydraulic coupler, which is bounded radially by a first guide for the first part and by a second guide for the second part. According to the invention, at least some sections of the first and the second guide are surrounded at their outer radii by fuel under high pressure, and the pressure realized in the hydraulic coupler is lower than the pressure radially outside the guides.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: October 21, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Matthias Burger, Hans-Christoph Magel
  • Patent number: 8844842
    Abstract: A fuel injector includes an injector body that defines a fuel inlet, a drain outlet and a nozzle outlet, and has disposed therein a nozzle chamber, a needle control chamber and a valve chamber. The needle control chamber is fluidly connected to the drain outlet through a drain passage that includes the conical seat, is fluidly connected to the nozzle chamber through a Z orifice, and fluidly connected to the valve chamber through an A orifice. The nozzle chamber is fluidly connected to the valve chamber by a pressure passage that includes an F orifice that opens through a flat seat. A control valve member is trapped to move between contact with conical seat and contact with the flat seat. An electrical actuator is operable to push the control valve member away from the conical seat toward the flat seat when energized. A direct control needle valve has an opening hydraulic surface positioned in the nozzle chamber and a closing hydraulic surface positioned in the needle control chamber.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: September 30, 2014
    Assignee: Caterpillar Inc.
    Inventors: Hoisan Kim, Mark F. Sommars, Xiangdong Ding
  • Patent number: 8800895
    Abstract: An improved fuel injection apparatus and method have a variable area injector arrangement in which a pintle defines a pilot orifice extending through a tip of the pintle for supplying a pilot flow of fuel through the fuel injector at low fuel pressures, and in particular when the pintle tip is sealed against a variable flow orifice of the variable area injector arrangement.
    Type: Grant
    Filed: August 27, 2008
    Date of Patent: August 12, 2014
    Assignee: Woodward, Inc.
    Inventors: Paul G. Hicks, Robert J. Pederson
  • Patent number: 8720802
    Abstract: The invention relates to a fuel injection valve for internal combustion engines having a valve body in which a blind hole is formed, with at least one injection opening proceeding from said blind hole. A longitudinally displaceable needle in the valve body has a valve sealing face formed at its end which faces towards the blind hole. The valve sealing face is formed from one or more conical faces, and the valve needle interacting, by means of a body seat, with said valve sealing face to control a fuel flow to the at least one injection opening. A needle tip adjoining the valve sealing face dips into the blind hole when the valve needle bears against the body seat, the needle tip being curved in a concave fashion directly adjacent to the valve sealing face.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: May 13, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Andreas Kerst, Gerhard Suenderhauf, Roland Schulz
  • Patent number: 8714465
    Abstract: A valve for atomizing fluid is specified, in particular an injection or metering valve for fuel injection or exhaust-gas systems of motor vehicles, which valve has a valve seat body (11) with a valve seat (14) which surrounds a valve opening (13), a perforated injection disc (17) which bears against the front side of the valve seat body (12) downstream of the valve opening (13) and has at least one spray hole (18) which is offset radially with respect to the valve opening (13), and an inflow cavity (19) which is present between the valve opening (13) and the at least one spray hole (18).
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: May 6, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Joerg Heyse, Hartmut Albrodt, Kerstin Koch
  • Publication number: 20140077004
    Abstract: A problem exists that in the case that a prior injection (a pilot injection B or a previous injection C) before a main injection A is executed when an engine is driven at a low load, a defective ignition and a defective combustion tend to be caused, an amount of carbon monoxide (CO) in an exhaust gas becomes excessive, and the carbon monoxide is discharged as white smoke. An engine device is mounted to a working vehicle, and a common rail type fuel injection device which injects fuel to the engine at multiple stages during one combustion cycle. The common rail type fuel injection device does not execute the prior injections B and C coming before the main injection A in the case that a load applied to the engine is in a low load state in which a load is lower than that at a working time by the working vehicle.
    Type: Application
    Filed: February 28, 2012
    Publication date: March 20, 2014
    Applicant: YANMAR CO., LTD.
    Inventor: Yoshiaki Seki
  • Publication number: 20140070028
    Abstract: A pressure regulator for a diesel fuel injection system includes an inlet configured to be connected to a reservoir of the diesel fuel injection system of a diesel engine, an outlet configured to be connected to a low-pressure group, a controllable closing device configured to be driven by an actuator between a first state in which the inlet and the outlet are hermetically isolated and a second state in which the inlet is connected to the outlet, and a plurality of spaces arranged on a side of the closing device including the outlet. A pressure compensation duct is configured to connect at least two spaces of the plurality of spaces to each other.
    Type: Application
    Filed: February 15, 2012
    Publication date: March 13, 2014
    Applicant: Robert Bosch GmbH
    Inventors: Pierre-Marie Rochas, Alain Amblard, Jean-Roch Julien
  • Patent number: 8657214
    Abstract: A fuel injection valve includes a valve body and a valve member. The fuel injection valve is configured to control fuel supply by a movement of the valve member relative to the valve body. A slit that is configured to inject fuel having a first end portion opened in a sack portion of the valve body and a second end portion opened at an outer wall of the valve body is formed in the valve body. A through hole having a first end portion opened in the sack portion and a second end portion opened at the outer wall of the valve body is formed in the valve body.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: February 25, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Eriko Matsumura
  • Patent number: 8628030
    Abstract: A fuel injection valve includes a valve body and a valve member. The fuel injection valve is configured to control fuel supply by a movement of the valve member relative to the valve body. A slit that is configured to inject fuel having a first end portion opened in a sack portion of the valve body and a second end portion opened at an outer wall of the valve body is formed in the valve body. A through hole having a first end portion opened in the sack portion and a second end portion opened at the outer wall of the valve body is formed in the valve body.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: January 14, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Eriko Matsumura
  • Publication number: 20140001288
    Abstract: An injection valve for injecting a liquid includes an electromagnetic actuator and a movable valve needle and a valve closing element that with a valve seating surface forms a sealing seat, and includes a perforated disc situated downstream from the sealing seat, the perforated disc having at least one inlet area and at least one outlet opening. An upper functional plane having the at least one inlet area has a different opening geometry in cross-section than a lower functional plane having the at least one outlet opening. The perforated disc has inlet areas, each provided, as a locally limited cavity, with a rectangular or bathtub-shaped contour, a respective outlet opening going out from each in the direction of flow, the outlet openings, going out from the midpoint of the respective inlet areas, and drawing an imaginary longitudinal axis and transverse axis through these, having an asymmetry as to both axes.
    Type: Application
    Filed: November 9, 2011
    Publication date: January 2, 2014
    Inventors: Hartmut Albrodt, Andreas Krause, Martin Stahl
  • Publication number: 20140000565
    Abstract: An injection valve may have a nozzle body with a longitudinal axis, in which a nozzle body aperture and at least one injection opening are arranged, wherein the nozzle body aperture can be coupled hydraulically to a high-pressure circuit for a fluid, at least one nozzle needle arranged in an axially movable manner in the nozzle body aperture, wherein the nozzle needle prevents fluid flow through the at least one injection opening in a closing position and allows fluid flow through the at least one injection opening outside the closing position, an actuator housing, which is designed to accommodate an actuator designed to act on the nozzle needle, and at least one fluid line, which is designed for hydraulic coupling to the high-pressure circuit for the fluid and is constructed and arranged separately from the actuator housing, and is directly coupled hydraulically to the nozzle body aperture.
    Type: Application
    Filed: May 9, 2013
    Publication date: January 2, 2014
    Inventors: Willibald Schurz, Martin Simmet, Gerd Schmutzler
  • Patent number: 8602328
    Abstract: The invention has an object for improving response of a fuel injection device. A flow-in recessed portion and a flow-out recessed portion are formed at a press-contacting surface of a floating plate, which is movably accommodated in a pressure control chamber. A flow-in port and a flow-out port are formed at a pressure control surface of a valve body. The flow-in port is opened to the flow-in recessed portion, while the flow-out port is opened to the flow-out recessed portion. When the floating plate is moved upwardly and the press-contacting surface is brought into contact with the pressure control surface, the flow-in port is surely closed.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: December 10, 2013
    Assignee: Denso Corporation
    Inventors: Naofumi Adachi, Shuichi Matsumoto, Keisuke Suzuki, Tomoyuki Tsuda, Yoichi Kobane, Yoshinori Okuno
  • Patent number: 8602322
    Abstract: Providing a fuel injection valve of the accumulator injection system, whereby the surge pressure caused by the change of the fuel injection rate when the nozzle needle begin to be seated on is reduced or lessened; the deterioration as to the fuel injection performance and the strength of the injection valve components the deterioration which is caused by the surge pressures is prevented. A fuel injection valve of the accumulator injection system, the fuel injection valve including: a nozzle 1, a nozzle needle 2, and a control rod 23; wherein, the control rod is provided with a groove whereby the groove communicates the high pressure fuel passage prior to a fuel injection shot; the groove is disconnected to the high pressure fuel passage and the fuel is injected into an engine combustion chamber during the fuel injection shot; the groove communicates with the high pressure fuel passage at the end of the injection shot.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: December 10, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Hisao Ogawa
  • Patent number: 8602319
    Abstract: A fuel injector includes an injector body with a tip component that defines at least one nozzle outlet. A needle valve member is positioned in the injector body and includes a frustoconical segment positioned in a frustoconical bore to separate a needle control chamber from a nozzle chamber. The needle valve member 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. The frustoconical bore and the frustoconical segment have a narrowing taper in the direction of an injector tip. The frustoconical features tend to slow the initial opening of the nozzle outlets, and hasten their closure relative to a counterpart injector with cylindrical needle guide features.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: December 10, 2013
    Assignee: Caterpillar Inc.
    Inventor: Jeffrey De Payva
  • Publication number: 20130298877
    Abstract: An electronically controlled fuel injection valve can independently control the time to inject fuel and the amount of fuel to be injected in response to a control signal sent from the operating condition of an engine unlike a traditional mechanical fuel injection valve, and employs a control method for fuel injection that increases the force of lifting up a cutoff needle of an injection controller by delivering high-pressure fuel to a lower pressure chamber via a control needle, thereby rapidly controlling fuel injection. The electronically controlled fuel injection valve prevents a nozzle part from being constantly subjected to high pressure due to the nozzle part being not supplied with fuel when fuel is not injected, prevents a large amount of fuel from leaking into a combustion chamber when a part such as a needle is damaged, and simplifies the structure of a second flow path, thereby facilitating fabrication.
    Type: Application
    Filed: December 26, 2011
    Publication date: November 14, 2013
    Applicant: HYUNDAI HEAVY INDUSTRIES CO., LTD.
    Inventors: Dong-Hun Kim, Seung-Hyup Ryu, Tae-Hyung Park
  • Patent number: 8567063
    Abstract: It is an object of the present invention to enhance the orifice design freedom and easy machine ability in a fuel injection valve in which orifices are formed by press-working.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: October 29, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Masato Higuma, Kenichi Gunji, Atsushi Sekine
  • Patent number: 8505514
    Abstract: A common rail single fluid injection system including fuel injectors with the ability to produce multiple injection rate shapes. This is accomplished by including auxiliary filling orifices which selectively provide pressurized fluid to the check needle control chamber during injection events. In so doing, the speed and movement of the check needle is manipulated and differing injection rates may be achieved.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: August 13, 2013
    Assignee: Caterpillar Inc.
    Inventors: Dianqi Fang, Lin Zhang, Stephen Robert Lewis, Zhenlong Xu, Avinash R. Manubolu, Shriprasad G. Lakhapati, Christopher D. Hanson
  • Patent number: 8496191
    Abstract: A seal arrangement for a needle valve in a fuel injector (100) includes a nozzle housing (122) forming an outer cavity (216) and defining a needle valve seat (218). A plurality of nozzle openings (204) are formed in the nozzle housing (122) and arranged symmetrically around its centerline at a first radial distance (R1). An outer needle valve (104) is reciprocally mounted in the outer cavity (216) and has a seat portion (224) arranged to abut the needle valve seat (218) when the outer needle valve (104) is seated or closed. A first ledge (502) formed on the seat portion (224) of the outer needle valve (104) sealably contacts the needle valve seat (218) along a first line contact seal (220) and a second ledge (508) formed on the seat portion (224) of the outer needle valve (104) sealably contacts the needle valve seat (218) along a second line contact seal (222).
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: July 30, 2013
    Assignee: Caterpillar Inc.
    Inventors: Marion B. Grant, Vladimir Theodorof, Dana R. Coldren
  • Publication number: 20130112767
    Abstract: A common rail fuel injector includes a needle valve member that moves to open and close nozzle outlets for a fuel injection event responsive to pressure in a needle control chamber. Between injection events, the needle control chamber is fluidly connected to the fuel inlet by a first pathway that includes a Z orifice, and fluidly connected to the fuel inlet by a second pathway that includes an F orifice, an intermediate chamber and an A orifice. During an injection event, the needle control chamber is fluidly connected to a drain outlet by a third pathway that includes the A orifice, the intermediate chamber an E orifice and a buffer chamber, which may assist in avoiding cavitation erosion in a sensitive area associated with a flat control valve seat. Different performance characteristics are achieved by adjusting the sizes of the respective of F, A, Z and E orifices.
    Type: Application
    Filed: November 7, 2011
    Publication date: May 9, 2013
    Applicant: CATERPILLAR INC.
    Inventors: Sana Mahmood, Zhenyu Li, Michael Curtis Herr, Gregory William Hefler, Linda Angharad Williams
  • Publication number: 20130104853
    Abstract: 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: Application
    Filed: November 1, 2012
    Publication date: May 2, 2013
    Applicant: CUMMINS INC.
    Inventor: Cummins INC.
  • Patent number: 8418941
    Abstract: The invention relates to an injector for a fuel injection system of an internal combustion engine, particularly in a motor vehicle, with an injector body which has a pressure booster section and a needle section. At least one injection hole is provided in the needle section. A nozzle needle which has an adjustable stroke is disposed in the needle section for controlling an injection of fuel through the at least one injection hole. A pressure booster is provided for increasing a fuel injection pressure relative to a system pressure. For this purpose, the pressure booster has a double-diameter or stepped piston, a control rod, and a pressure booster bottom which together form the boundary of a coupling chamber. A coupling path extends into the control rod and connects the coupling chamber, over a valve device which is located outside or within the injector, to a high-pressure supply of fuel.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: April 16, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Markus Melzer, Joachim Boltz
  • Publication number: 20130075498
    Abstract: Fuel injectors with intensified fuel storage and methods of operating an engine therewith. At least one storage cavity is provided in the intensifier type fuel injector, with a check valve between the intensifier and the needle chamber and storage cavity preventing loss of injection pressure while the intensifier plunger cylinder is refilling with fuel. This provides very efficient injector operation, particularly at low engine loads, by eliminating the wasted energy of compressing, venting and recompressing fuel for injection. Various injector designs and methods of operating the same in an engine are disclosed.
    Type: Application
    Filed: November 21, 2012
    Publication date: March 28, 2013
    Inventor: Oded Eddie Sturman
  • Patent number: 8402655
    Abstract: Disclosed herein is a method for processing an orifice capable of processing recessed portions and orifices, each having a unique hole diameter different from each other, to high positioning accuracy and in a short time. A press includes: a B-axis angle indexing device 3 disposed on a base 2b, the B-axis angle indexing device 3 including a table B; an A-axis angle indexing device 25 disposed on the table B, the A-axis angle indexing device 25 including a table A; a chuck 32 disposed on the table A, the chuck 32 for holding a work; a base Z 6 disposed on a base, the base Z 6 being operable in an axis Z-direction; a base X 8 disposed on the base Z, the base X 8 being operable in an axis X-direction; a punch holding portion 13 disposed on the base X, the punch holding portion 13 being operable vertically in an axis Y-direction; and a plurality of punches 19, 22 held on the punch holding portion in parallel with the axis Z.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: March 26, 2013
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Masato Higuma, Kenichi Gunji, Tsuneyoshi Inoue, Yasuyuki Tanaka, Hideki Fukushima
  • Publication number: 20130037622
    Abstract: A fuel injector includes an injector body that defines a fuel inlet, a drain outlet and a nozzle outlet, and has disposed therein a nozzle chamber, a needle control chamber and a valve chamber. The needle control chamber is fluidly connected to the drain outlet through a drain passage that includes the conical seat, is fluidly connected to the nozzle chamber through a Z orifice, and fluidly connected to the valve chamber through an A orifice. The nozzle chamber is fluidly connected to the valve chamber by a pressure passage that includes an F orifice that opens through a flat seat. A control valve member is trapped to move between contact with conical seat and contact with the flat seat. An electrical actuator is operable to push the control valve member away from the conical seat toward the flat seat when energized. A direct control needle valve has an opening hydraulic surface positioned in the nozzle chamber and a closing hydraulic surface positioned in the needle control chamber.
    Type: Application
    Filed: August 12, 2011
    Publication date: February 14, 2013
    Applicant: Caterpillar Inc.
    Inventors: Hoisan Kim, Mark F. Sommars, Xiangdong Ding
  • Patent number: 8371516
    Abstract: In a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, an injection valve member for opening and closing at least one injection opening is triggered by a control valve embodied as a magnet valve. On the armature of the magnet valve, a sealing face is embodied that for closing the control valve is positionable into a valve seat. The armature of the magnet valve is movable, without armature guidance, between an upper and a lower stroke stop. Because the sealing face, which for closing the control valve is positionable into the valve seat, is embodied on the armature, an additional closing element of the kind provided in the prior art can be dispensed with.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: February 12, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Nadja Eisenmenger
  • Patent number: 8348176
    Abstract: Proposed is a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine. The fuel injector has a housing in which are arranged an injection valve element with a nozzle needle, a pressure boosting device, and a first control valve, and a second control valve. The first control valve controls a control space of the nozzle needle and the second control valve controls a differential pressure space of the pressure boosting device. A first return flow connection is provided for discharging the control quantity of the control space of the nozzle needle, and a second return flow connection is provided for discharging the control quantity of the pressure boosting device. The two return flow connections are arranged on different housing parts of the housing.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: January 8, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Frasch, Heinz-Bernd Haiser, Christoph Butscher, Hans-Christoph Magel, Stephan Wehr
  • Publication number: 20120318885
    Abstract: A valve assembly for an injection valve may include a valve body comprising a cavity with a fluid inlet portion and a fluid outlet, and a valve needle axially movable in the cavity, the valve needle preventing a fluid flow through the fluid outlet in a closing position and releasing the fluid flow through the fluid outlet in further positions, the valve needle comprising a radially extending protrusion and an electro-magnetic actuator unit configured to actuate the valve needle and comprising an armature in the cavity. The armature comprises an armature cavity having a first stop surface and a second stop surface that faces the first stop surface. The protrusion of the valve needle is arranged in the armature cavity axially between the first stop surface and the second stop surface such that a relative movement between the valve needle and the armature in axial direction is limited.
    Type: Application
    Filed: June 15, 2012
    Publication date: December 20, 2012
    Inventors: Mauro Grandi, Valerio Polidori, Cristiano Mannucci
  • Patent number: 8245951
    Abstract: Use of carbon nanotubes (CNTs) in a charge injector to assist in atomizing fuel for engine applications. A CNT charging unit is positioned in front of a fuel injector. A voltage is applied on a CNT coated mesh to charge the fuel stream when it passes. Then the charged stream goes through a grounded metal cage. The fuel is thereby electrostatically charged causing repulsive forces on surfaces of liquid in the fuel resulting in the liquid splitting into droplets.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: August 21, 2012
    Assignee: Applied Nanotech Holdings, Inc.
    Inventors: Richard Lee Fink, Nan Jiang
  • Patent number: 8231069
    Abstract: In a fuel injection nozzle for an internal combustion engine, a first cavity is disposed downstream of a valve seat in a direction in which fuel flows. A second cavity is disposed downstream of the first cavity in the direction in which the fuel flows. A fuel passage connects the first cavity to the second cavity. Fuel injection holes (24) lead to the second cavity. With this configuration, when the fuel flows through the first fuel passage, cavitation is induced. Cavitation bubbles flow into the second cavity along with the fuel. When the fuel is retained in the second cavity, the cavitation bubbles are uniformly mixed into the fuel. The fuel, which has been sufficiently mixed with the cavitation bubbles, is injected from the fuel injection holes.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: July 31, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Eriko Matsumura, Tomojiro Sugimoto, Motonari Yarino
  • Patent number: 8210454
    Abstract: The invention relates to a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, which fuel injector comprises an injection valve element, for opening and closing at least one injection opening and a pressure booster, by way of which fuel which is at system pressure is compressed to injection pressure. The pressure booster is actuated via a first control valve and the injection valve element is actuated via a second control valve. The pressure booster comprises a pressure booster piston which is assigned a spring element which is supported by way of one side on the injector housing and by way of the other side on the pressure booster piston. The pressure booster piston delimits a compression chamber, a differential pressure chamber and a control chamber.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: July 3, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Juergen Frasch, Stephan Wehr