With Discharge Modifier* Patents (Class 239/533.12)
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Patent number: 6854670Abstract: A fuel injection valve includes a valve seat member, and an injector plate which is coupled to a front end face of the valve seat member and has a plurality of fuel injection orifices disposed about an axis of the valve seat member to communicate with a valve seat. Swirling means for swirling a fuel injected from each of the fuel injection orifices is provided in at least one of the valve seat member and the injector plate. The plurality of fuel injection orifices are disposed so that liquid membrane portions of adjoining hollow conical fuel spray forms formed by the fuel injected from the fuel injection orifices collide with one another. Thus, the atomization of the injected fuel can be further promoted, and a coalesced fuel spray form having a fuel particle density higher in a central zone and lower in an outer peripheral zone can be formed.Type: GrantFiled: May 12, 2003Date of Patent: February 15, 2005Assignee: Keihin CorporationInventors: Noriaki Sumisha, Ryohei Kimura, Kazuhiko Sato, Shunsuke Inagaki, Kenichi Sato
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Patent number: 6851629Abstract: A fuel injector (1) for fuel injector systems of internal combustion engines has a valve-closure member (4) which is mechanically linked to a valve needle (3) and cooperates with a valve-seat surface (6) of a valve-seat member (5) to form a sealing seat. A turbulence-producing element is provided in the valve-seat member (5), situated downstream from the sealing seat, and its center line (38) preferably forms an angle different from zero with the center line (39) of the fuel injector (1), a threaded rod (36) being pressed into the valve-seat member (5) as the turbulence-producing element.Type: GrantFiled: October 10, 2001Date of Patent: February 8, 2005Assignee: Robert Bosch GmbHInventors: Hubert Stier, Joerg Heyse
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Patent number: 6851630Abstract: An electromagnetic fuel injection valve includes a valve housing coupled to at one end thereof to a valve seat member; a stationary core coupled to the other end of the valve housing; and a valve assembly comprised of a movable core slidably accommodated in the valve housing, and a valve member connected to the movable core through a rod portion and adapted to cooperate with the valve seat. In the electromagnetic fuel injection valve, the valve housing is provided with a guide portion on which the valve assembly is axially slidably carried, and a high-hardness coating of diamond-like carbon including silicon is formed on an outer peripheral surface of the valve assembly contacting with the guide portion. The surface roughness Rmax of the high-hardness coating is set in a range of 0.05 to 0.2 ?m.Type: GrantFiled: January 10, 2003Date of Patent: February 8, 2005Assignee: Keihin CorporationInventors: Takahiro Nagaoka, Hideyuki Watanabe, Shinya Ichise
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Patent number: 6848634Abstract: A body and a seat for a fuel injector having a fuel inlet, a fuel outlet, and a fuel passageway extending from the fuel inlet to the fuel outlet along a longitudinal axis. The body includes an inlet portion, an outlet portion, and a neck portion disposed between the inlet portion and the outlet portion. The seat includes a first face, a second face, and a circumferential surface disposed between the first face and the second face. The circumferential surface includes a first zone and a second zone that are connected by an intermediate zone, the intermediate zone engaging the body and the second zone being thermally isolated from the body. A fuel injector and a method of forming a fuel injector are also disclosed.Type: GrantFiled: December 30, 1999Date of Patent: February 1, 2005Assignee: Siemens VDO Automotive Corp.Inventor: William James Imoehl
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Patent number: 6848635Abstract: A fuel injector nozzle assembly includes an injector body including a valve seat with a supply passage through which fuel flows generally along a supply axis. A nozzle plate is mounted onto the valve seat and includes a plurality of orifice holes therein through which fuel flows. A turbulence cavity is defined by the nozzle plate and the valve seat wherein fuel flows into the turbulence cavity through the supply passage and out from the turbulence cavity through the plurality of orifice holes. A plurality of obstructions are located within the turbulence cavity directly in front of the orifice holes and are adapted to create turbulence eddies within the flow entering the orifice holes.Type: GrantFiled: January 31, 2002Date of Patent: February 1, 2005Assignee: Visteon Global Technologies, Inc.Inventor: Min Xu
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Patent number: 6848636Abstract: A fuel injection valve includes a valve seat portion, a nozzle hole plate, and a valve member. The valve seat portion has an inner circumferential surface including a valve seat. The nozzle hole plate is disposed at a downstream side of a fuel passage of the valve seat. The nozzle hole plate has a nozzle hole for injecting fuel flowing out from the fuel passage. The valve member seats on the valve seat to close the fuel passage and unseats from the valve seat to open the fuel passage. Diameter of the inner circumferential surface decreases as approaching to a downstream side. The nozzle hole of the nozzle hole plate is formed so that length of radial outside of the nozzle hole with respect to a shaft center of the fuel injection valve is smaller than that of radial inside of the nozzle hole.Type: GrantFiled: April 16, 2003Date of Patent: February 1, 2005Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tsuyoshi Munezane, Mamoru Sumida
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Patent number: 6845925Abstract: To produce a fuel spray that is asymmetrical in the flow rate distribution of a sprayed fuel in order to improve the homogeneity of air-fuel mixture density during the air intake stroke injection for homogeneous combustion in an in-cylinder injection engine, the exit portion of the fuel injection hole is provided with the wall surfaces 204a, 204b, 205a, and 205b that are parallel to the central axis of the injection hole. Also, the periphery of the injection hole is provided with a plurality of areas in which the flow of the fuel in the radial direction of the injection hole will be restrained, and an plurality of areas in which the flow of the fuel in the radial direction of the injection hole will not be restrained, and a different size is assigned to each non-restraint area.Type: GrantFiled: November 21, 2001Date of Patent: January 25, 2005Assignee: Hitachi, Ltd.Inventors: Motoyuki Abe, Yoshio Okamoto, Yuzo Kadomukai, Makoto Yamakado, Ayumu Miyajima, Toru Ishikawa, Yasuo Namaizawa
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Patent number: 6845930Abstract: A fuel injector that allows spray targeting and distribution of fuel to be configured using non-angled or straight orifice having an axis parallel to a longitudinal axis of a valve subassembly. Metering orifices are located about the longitudinal axis and defining a first virtual circle greater than a second virtual circle defined by a projection of the sealing surface onto the metering disc so that all of the metering orifices are disposed outside the second virtual circle. The projection of the sealing surface converges at a virtual apex disposed within the metering disc. At least one channel extends between a first end and second end. The first end is disposed at a first radius from the longitudinal axis and spaced at a first distance from the metering disc.Type: GrantFiled: June 28, 2002Date of Patent: January 25, 2005Assignee: Siemens VDO Automotive Corp.Inventor: William A. Peterson, Jr.
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Patent number: 6840465Abstract: Using a swirl type fuel injection valve, a concentrated spray area and a thin spray area are formed, the position thereof are adjusted, and the spray is made to conform to the geometric shape of the engine and mounting position of the fuel injection valve, so as to reduce the fuel consumption and control the unburnt components in exhaust gas. The fuel injection valve is so constructed that a step is formed on the injection hole opening of the fuel injection valve, so as to provide two or more edge transition portions at the injection hole opening, resulting from the step, and the line connecting the edge transition portions forms an oblique angle relative to the wall formed by the step perpendicular to the injection hole center axis and the angled wall.Type: GrantFiled: December 26, 2001Date of Patent: January 11, 2005Assignee: Hitachi, Ltd.Inventors: Motoyuki Abe, Yoshio Okamoto, Yuzo Kadomukai, Makoto Yamakado, Ayumu Miyajima, Hiromasa Kubo, Toru Ishikawa, Yasuo Namaizawa
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Patent number: 6837445Abstract: The present invention comprises a nozzle type atomizer with two or more aligned “horn” stages. The definition of a “horn” stage is well known in the prior art as an effectively half wavelength length and a tapering shape with a central conduit. The present invention uses two to five, or more, horn stages integrally attached end to end. The dramatic improvement in amplitude of the vibration at the tip of the nozzle is without precedence in the prior art. The present invention makes application of transducer vibration at greater than 200 kHz possible. The present invention reduces the required applied energy for generating the necessary amplitude at the tip by the discovery of amplitude multiplication with two or more horn stages.Type: GrantFiled: December 29, 2003Date of Patent: January 4, 2005Inventor: Shirley Cheng Tsai
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Patent number: 6837449Abstract: A fuel injector for fuel-injection systems of internal combustion engines includes an actuator, a valve needle, which is able to be activated by the actuator to actuate a valve-closure member, which, together with a valve-seat surface formed at a valve-seat member, forms a sealing seat; and a plurality of spray-discharge orifices which is formed in the valve-seat member. At a discharge-side end of the fuel injector, a nozzle-orifice cover is positioned, which shields the spray-discharge orifices from the combustion chamber of the internal combustion engine.Type: GrantFiled: June 18, 2002Date of Patent: January 4, 2005Assignee: Robert Bosch GmbHInventors: Günter Dantes, Detlef Nowak
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Publication number: 20040262430Abstract: A fuel injector includes a seat, a movable member cooperating with the seat, and an orifice plate. The metering orifice disc includes a member having first and second generally parallel surfaces, and an orifice penetrating the member. The first surface generally faces the seat and represents the fuel entry side. The second surface faces opposite the first surface and represents the fuel exit side. The orifice is defined by a wall that couples the first and second surfaces. And the wall includes first and second portions. The first portion is spaced from the first surface and extends generally parallel to a longitudinal axis. The second portion couples the first portion to the first surface and extends at a first oblique angle that varies with respect to the first surface.Type: ApplicationFiled: June 30, 2003Publication date: December 30, 2004Inventor: J. Michael Joseph
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Publication number: 20040262431Abstract: A fuel injection valve with high freedom to optimize the direction of fuel spray, the shape of spray, the length of penetration, the existence/absence of lead spray and the like, in correspondence with each type of internal combustion engine is provided. A swirling force about a central axis of an injection orifice is supplied by a swirler to fuel injected from the injection orifice. A central axis E of the injection orifice is slanted at a predetermined deflection angle to a central axis of a valve body. Further, a step portion is formed in an end surface of the injection orifice.Type: ApplicationFiled: April 30, 2004Publication date: December 30, 2004Inventors: Shuuichi Shimizu, Takuya Shiraishi, Motoyuki Abe, Masahiko Hayatani, Kouji Shibata
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Patent number: 6827297Abstract: A fuel injection valve having a valve body (5), in which a pistonlike valve member (7) is guided longitudinally displaceably in a bore (15) embodied as a blind bore. A conical valve seat (23) and at least one injection port (25) are embodied on the bottom face of the bore (15), and the injection port connects a pressure chamber (11), formed between the portion (107) of the valve member (7) toward the combustion chamber and the bore (15), with the combustion chamber. On the end toward the combustion chamber of the valve member (7), there is a valve member tip (13), on which a first conical face (30), adjacent to the valve member (7), and a second conical face (32), disposed on the combustion chamber side of the first conical face, are embodied.Type: GrantFiled: June 12, 2002Date of Patent: December 7, 2004Assignee: Robert Bosch GmbHInventor: Axel Hockenberger
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Publication number: 20040237929Abstract: A direct injection fuel injector includes a nozzle tip having a plurality of passages allowing fluid communication between an inner nozzle tip surface portion and an outer nozzle tip surface portion and directly into a combustion chamber of an internal combustion engine. A first group of the passages have inner surface apertures located substantially in a first common plane. A second group of the passages have inner surface apertures located substantially in at least a second common plane substantially parallel to the first common plane. The second group has more passages than the first group.Type: ApplicationFiled: May 30, 2003Publication date: December 2, 2004Applicant: Caterpillar Inc.Inventors: Mark S. Cavanagh, Roger L. Urven, Keith E. Lawrence
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Patent number: 6824085Abstract: A fuel injector, in particular for direct injection of fuel into the combustion chamber of an internal combustion engine, includes a valve-closure member which forms a sealing seat together with a valve-seat surface which is formed on a valve-seat member, and several injection orifices, each of which is connected with at least one spiral groove so that an outer edge of the swirl grooves coincides in part with a circumferential edge of the injection orifices. The swirl grooves extend generally perpendicular to a center line of the injection orifice associated with them.Type: GrantFiled: November 5, 2002Date of Patent: November 30, 2004Assignee: Robert Bosch GmbHInventors: Thomas Sebastian, Jens Pohlmann, Martin Maier, Guenter Dantes, Detlef Nowak, Joerg Heyse, Joerg Schlerfer
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Patent number: 6823833Abstract: The swirl injector for an internal combustion engine is an electronic fuel injector for a direct injection engine, either gasoline or diesel. The injector has a housing defining a fluid channel, a needle valve disposed in the fluid channel with a spring biasing the valve to a closed position, and a solenoid disposed in the housing encircling the fluid channel. The injector has a nozzle with a conical valve seat and a cylindrical discharge orifice. The needle tip is ball shaped, and the needle body has a plurality of helical grooves which are rectangular in cross section having a width to depth ratio of 1.5:1 at about a 46° angle adjacent the tip. The valve lift is 50 &mgr;m in 60 &mgr;s. The penetration, swirl speed, and pitch angle are controllable through the injection pressure, providing an enhanced fuel injector for dual mode fuel injection.Type: GrantFiled: January 27, 2003Date of Patent: November 30, 2004Assignee: Combustion Dymanics Corp.Inventor: Murad M. Ismailov
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Patent number: 6820826Abstract: A subassembly of a fuel injector that allows spray targeting and distribution of fuel to be configured using non-angled or straight orifice having an axis parallel to a longitudinal axis of the subassembly. Metering orifices are located about the longitudinal axis and defining a first virtual circle greater than a second virtual circle defined by a projection of the sealing surface onto the metering disc so that all of the metering orifices are disposed outside the second virtual circle within one quadrant of the circle. A channel is formed between the seat orifice and the metering disc that allows the fuel injector to target fuel spray generally within an arcuate sector of at least 90 degrees about the longitudinal axis of the metering disc. A method of targeting is also provided.Type: GrantFiled: September 25, 2002Date of Patent: November 23, 2004Assignee: Siemens VDO Automotive Corp.Inventor: William A. Peterson, Jr.
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Patent number: 6817546Abstract: Valve body for a fuel injector; the valve body is provided with a cylindrical tubular container which has a central cylindrical cavity, a valve seat which is disposed at a lower end of the tubular container, a pin which can engage the valve seat and is accommodated in a sliding manner inside the tubular container, a lower guide for the pin, which guide is accommodated in the valve seat, and an upper guide for the pin which is contained in a support element, which is disposed at an upper end of the tubular container and defines a pair of supply apertures which open into the cavity for supply of fuel to the cavity itself.Type: GrantFiled: July 26, 2002Date of Patent: November 16, 2004Assignee: Magneti Marelli Powertrain S.p.A.Inventors: Lorenzo Battistini, Massimo Neretti, Andrea Ricci
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Patent number: 6817545Abstract: A fuel injector nozzle assembly includes an injector body including a valve seat with a supply passage through which fuel flows generally along a supply axis. The valve seat presents an upper surface which is adapted to engage a valve to seal the supply passage. A nozzle plate is mounted onto the valve seat and includes a plurality of orifice holes therein through which fuel flows. The valve seat further includes a first edge protrusion protruding into the fuel flow for generating a first separation of the fuel flow, thereby creating a plurality of small eddies which are entrained within the fuel flowing adjacent thereto. A turbulence cavity is defined by the nozzle plate and the valve seat wherein fuel flows into the turbulence cavity through the supply passage and out from the turbulence cavity through the plurality of orifice holes.Type: GrantFiled: January 9, 2002Date of Patent: November 16, 2004Assignee: Visteon Global Technologies, Inc.Inventor: Min Xu
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Patent number: 6814312Abstract: A fuel injection valve that sprays a finer particulate fuel has a tightly closed valve portion and can be assembled by press-fitting. A cup-shaped injection hole plate has its entire circumference joined to a valve body, has a bottom portion with injection holes, and has a cylindrical portion provided upright from the peripheral edge of the bottom portion. A resin sleeve has a resin annular portion with an opening that opens toward the downstream direction of fuel sprayed from the injection hole plate, and a resin cylindrical portion provided upright from the peripheral edge of the resin annular portion. The injection hole plate is provided with projections and the sleeve is provided with cutout grooves to engage the projections.Type: GrantFiled: October 25, 2002Date of Patent: November 9, 2004Assignee: Denso CorporationInventors: Akira Iwano, Takayuki Hokao
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Publication number: 20040217208Abstract: A fuel injector that includes a housing, a seat, a metering disc and a closure member. The metering orifices can be located on a first virtual circle greater than a second virtual circle as defined by a projection of a sealing surface converging at a virtual apex projected on the metering disc. The metering disc can be dimpled to increase the spray angle. Various parameters can be utilized to achieve a desired cone size and spray angle. A method of controlling spray targeting of a fuel injector is also described.Type: ApplicationFiled: January 9, 2004Publication date: November 4, 2004Applicant: Siemens VDO Automotive CorporationInventors: John F. Nally, William A. Peterson
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Publication number: 20040217213Abstract: A fuel injector that includes a housing, a seat, a metering disc and a closure member. The metering orifices can be located on a first virtual circle greater than a second virtual circle as defined by a projection of a sealing surface converging at a virtual apex projected on the metering disc. The metering disc can be dimpled to increase the spray angle. Various parameters can be utilized to achieve a desired cone size and spray angle. A method of controlling spray targeting of a fuel injector is also described.Type: ApplicationFiled: January 9, 2004Publication date: November 4, 2004Applicant: Siemens VDO Automotive CorporationInventors: John F. Nally, William A. Peterson
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Publication number: 20040217207Abstract: A fuel injector that includes a housing, a seat, a metering disc and a closure member. The metering orifices can be located on a first virtual circle greater than a second virtual circle as defined by a projection of a sealing surface converging at a virtual apex projected on the metering disc. The metering disc can be dimpled to increase the spray angle. Various parameters can be utilized to achieve a desired cone size and spray angle. A method of controlling spray targeting of a fuel injector is also described.Type: ApplicationFiled: January 9, 2004Publication date: November 4, 2004Applicant: Siemens VDO Automotive CorporationInventors: John F. Nally, William A. Peterson
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Publication number: 20040206833Abstract: It is, accordingly, an object of the present teachings to provide fuel injectors that can prevent leakage of noise, which is caused by contact of the valve with the valve seat, to the outside of the fuel injector. a representative injector may comprise a fuel passage, a valve, a valve seat, a jet opening and a jet opening downstream channel. The valve is disposed on the fuel passage and the valve seat receives the valve. The jet opening is formed in the valve seat and through which fuel is exhausted. The jet opening may be opened when the valve is moved apart from the valve seat. The jet opening downstream channel extends downstream from the jet opening through the valve seat and communicates the jet opening to the outside. The diameter of the jet opening downstream channel may be arranged and adapted such that the valve seat has a wall thickness to prevent leakage of noise to the outside through the valve seat.Type: ApplicationFiled: February 4, 2004Publication date: October 21, 2004Applicant: Aisan Kogyo Kabushiki KaishaInventors: Hiroshi Kawazoe, Toshiro Makimura
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Patent number: 6802296Abstract: A fuel injection system for internal combustion engines includes a fuel injector that includes a spray-orifice plate through which fuel is injected into a combustion chamber. The combustion chamber is bounded by a cylinder wall. A piston is guided in the cylinder wall, and a spark plug projects into the combustion chamber. The diameters of injection orifices positioned on the spray-orifice disk are distributed such that, at a particular point of injection, the injected fuel is distributed as homogenously as possible in an injection volume of the combustion chamber, bounded by the piston and the cylinder wall.Type: GrantFiled: June 11, 2003Date of Patent: October 12, 2004Assignee: Robert Bosch GmbHInventors: Stefan Arndt, Werner Herden
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Publication number: 20040195390Abstract: A fuel injector for an internal combustion engine is disclosed. The fuel injector includes a housing, a valve seat, a metering orifice disc, and a needle. The housing has an inlet, an outlet, and a longitudinal axis extending therethrough. The valve seat is disposed proximate the outlet and includes a passage having a sealing surface and an orifice. The metering orifice disc is located at the outlet and has a plurality of metering openings extending therethrough. The needle is reciprocally located within the housing along the longitudinal axis between a first position wherein the needle is displaced from the valve seat, allowing fuel flow past the needle, and a second position wherein the needle is biased against the valve seat, precluding fuel flow past the needle. A generally annular channel is formed between the valve seat and the metering orifice disc. The channel tapers outwardly from a large height to a smaller height toward the orifice openings.Type: ApplicationFiled: March 24, 2004Publication date: October 7, 2004Inventor: William A. Peterson
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Patent number: 6799733Abstract: A fuel injector having a fuel inlet, a fuel outlet, and a fuel passageway extending from the fuel inlet to the fuel outlet along a longitudinal axis. The fuel injector includes a body, a needle slidingly disposed within the body and a seat disposed at the fuel outlet. The seat has a plurality of passages, each of the plurality of passages having a central axis having an angle of inclination relative to the longitudinal axis.Type: GrantFiled: June 28, 2000Date of Patent: October 5, 2004Assignee: Siemens Automotive CorporationInventors: Jeff Pace, Vernon Richard Warner, Daniel Scott Baker, Sr., James H. Cohen
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Publication number: 20040188550Abstract: A valve seat member includes; a valve seat face allowing a valve body to be seated when the valve body is closed, and an injection port on downstream side of the valve seat face. A nozzle plate is connected to valve seat member and disposed on downstream side of injection port. The nozzle plate has nozzle holes radially outwardly with respect to injection port. A cross section of fuel passage is perpendicular to injection port, having diameter gradually increased. The fuel passage connects the injection port to nozzle holes.Type: ApplicationFiled: March 11, 2004Publication date: September 30, 2004Applicant: HITACHI UNISIA AUTOMOTIVE, LTD.Inventors: Takahiro Saito, Hidehiko Koyashiki
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Patent number: 6796516Abstract: A fuel injector is described having a movable valve part, which for opening and closing of the valve cooperates with a stationary valve seat which is formed on a valve seat element. A swirl disk is arranged downstream from the valve seat and has a multilayer configuration. The fuel flowing through is imparted to a swirl component between at least one inlet area and at least one outlet area. In a first swirl-generating plane a swirl component is imparted to a first portion of the flow, while a second portion of the flow without swirl and independent of the first swirling portion of the flow is routed inside the swirl disk, and in a second swirl-generating plane a swirl component is imparted only to the second portion of the flow. The fuel injector may be suitable for direct injection of fuel into a combustion chamber of an internal combustion engine having compression of a fuel/air mixture with spark ignition.Type: GrantFiled: October 28, 2002Date of Patent: September 28, 2004Assignee: Robert Bosch GmbHInventors: Martin Maier, Joerg Heyse
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Patent number: 6796512Abstract: The invention relates to an injector body for a fuel injection system, in which the injector body has a substantially cylindrically shaped valve chamber, into which fuel can be introduced at high pressure via an inlet bore, which discharges through an inlet opening in the valve chamber. To compensate for the high local notch tensile stresses in the circumferential direction of the valve chamber, it is proposed that at least in the region of the inlet opening, the valve chamber be provided with bulges, each adjacent the inlet opening in the circumferential direction. These bulges bring about a major compensation for the notch tensile stresses and thus increase the high-pressure strength.Type: GrantFiled: October 21, 2002Date of Patent: September 28, 2004Assignee: Robert Bosch GmbHInventors: Martin Grieb, Stefan Haug
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Publication number: 20040178286Abstract: A fuel injection valve, for an engine, comprising a nozzle body having a plurality of nozzle holes and a needle valve reciprocated in the nozzle body for controlling the inflow of the fuel into the nozzle holes is disclosed. The fuel is rendered to flow into the nozzle holes from a direction along the inner wall surface of the nozzle body around each of the nozzle holes in a first inflow mode, and from a direction substantially perpendicular to the inner wall surface of the nozzle body in a second inflow mode. The first inflow mode and the second inflow mode can be selectively switched to each other. The fuel is rendered to flow into the nozzle holes in the first inflow mode before the lapse of a predetermined time after the engine is started, and in the first or second mode as required after the lapse of the predetermined time.Type: ApplicationFiled: March 8, 2004Publication date: September 16, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keiso Takeda, Tomojiro Sugimoto
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Patent number: 6789752Abstract: A fuel injector, in particular for the direct injection of fuel into the combustion chamber of a mixture-compressing, externally fired internal combustion engine, comprising, upstream from a valve-seat surface, a swirl disk provided with swirl channels from which, given an open fuel injector, the fuel flows with a circumferential speed into a swirl chamber which is also located upstream from the valve-seat surface. Each point downstream from the swirl disk (35) through which a flow is to pass has a larger extension in every spatial direction than the diameter of the swirl channels.Type: GrantFiled: December 13, 2002Date of Patent: September 14, 2004Assignee: Robert Bosch GmbHInventors: Guenter Dantes, Detlef Nowak
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Patent number: 6786423Abstract: A fuel injector for an internal combustion engine is disclosed. The fuel injector includes a housing, a valve seat, a metering orifice, and a needle. The housing has an inlet, an outlet, and a longitudinal axis extending therethrough. The valve seat is disposed proximate the outlet and includes a passage having a sealing surface and an orifice. The metering orifice is located at the outlet and has a plurality of metering openings extending therethrough. The needle is reciprocally located within the housing along the longitudinal axis between a first position wherein the needle is displaced from the valve seat, allowing fuel flow past the needle, and a second position wherein the needle is biased against the valve seat, precluding fuel flow past the needle. A generally annular channel is formed between the valve seat and the metering orifice. The channel tapers outwardly from a large height to a smaller height toward the orifice openings.Type: GrantFiled: June 3, 2002Date of Patent: September 7, 2004Assignee: Siemens Automotive CorporationInventor: William A. Peterson, Jr.
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Patent number: 6782867Abstract: In a center injection type of direct injection engine, since it has an ignition plug and an injector arranged in proximity, there occurs the problem that a sprayed liquid fuel directly strikes the ignition plug and causes the plug to misfire. A notch is to be provided at a portion of the injector end so as to form a coarse-grained portion and a dense portion in sprays of fuel, and the injector is disposed so that the coarse-grained portion is directed towards the ignition plug. It is possible to avoid the misfiring of the ignition plug and thus prolong the life of the plug, by preventing a liquid fuel from directly striking the plug.Type: GrantFiled: January 23, 2002Date of Patent: August 31, 2004Assignee: Hitachi, Ltd.Inventors: Yoko Nakayama, Toshiharu Nogi, Takuya Shiraishi, Yusuke Kihara, Tohru Ishikawa
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Patent number: 6779743Abstract: In a fuel injection valve including a flat fuel diffusion chamber provided between a valve seat member and an injector plate to widen radially outwards from an outer end edge of a valve seat bore, an annular step is formed on a ceiling surface of the fuel diffusion chamber so that a level of the ceiling surface is gradually lowered radially outwards, and fuel injection orifices are disposed immediately below the step and at a distance from an inner peripheral wall of the fuel diffusion chamber. Thus, a fuel spread radially in the fuel diffusion chamber is allowed to collide with the annular step, leading to an enhancement in fuel diffusing effect, so that it is possible to further promote the atomization of the fuel injected from the fuel injection orifices and to form more stable fuel spray forms.Type: GrantFiled: June 19, 2003Date of Patent: August 24, 2004Assignee: Keihin CorporationInventor: Koji Kitamura
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Publication number: 20040159721Abstract: There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston.Type: ApplicationFiled: February 18, 2004Publication date: August 19, 2004Applicant: Hitachi, Ltd.Inventors: Takuya Shiraishi, Toshiharu Nogi, Minoru Ohsuga, Yoko Nakayama, Noboru Tokuyasu
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Patent number: 6776353Abstract: A fuel injector for use in a fuel injection system of an internal combustion engine that includes a body, valve seat, closure member, orifice plate and metering device. The closure member and the valve seat define a sealing surface, located on a virtual circle defining a sealing diameter. The orifice plate includes a third surface, a fourth surface and at least one orifice, located on a virtual circle on the orifice plate defining a first radius and between the third and fourth surfaces. The metering device has first and second faces contiguous to a third face. At least one of the first and third faces are spaced from one of the first and second surfaces of the valve seat to define a plurality of passages. Each passage has an outlet located on a virtual circle defining a second diameter greater than at least one of the first and the sealing diameters.Type: GrantFiled: December 17, 2001Date of Patent: August 17, 2004Assignee: Siemens VDO Automotive CorporationInventors: Jayashree Moorthy, Wei-Min Ren
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Publication number: 20040149839Abstract: A fuel injector (1), especially for the direct injection of fuel into a combustion chamber of an internal combustion engine, includes a valve needle (3) having at its spray-discharge end a valve-closure member (4), which cooperates with a valve-seat surface (6) formed on a valve-seat member (5) to form a sealing seat; at least one swirl channel (34) in a section (36) of the valve-seat member (5) surrounding the valve needle (3); and at least one spray-discharge orifice (7) provided in the valve-seat member (5). The at least one swirl channel (34), viewed through the swirl channel (34) in the flow direction of the fuel, is inclined counter to the spray-discharge direction relative to the center axis (37) of the valve needle (3).Type: ApplicationFiled: April 6, 2004Publication date: August 5, 2004Inventors: Guenter Dantes, Joerg Heyse
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Patent number: 6769638Abstract: A fuel injection valve including an orifice plate having a plurality of injection orifices, a valve seat in the upstream section of the injection orifices and has a cylindrical fuel flow path formed therein, a fuel cavity formed between the fuel flow path and the orifice plate directly above the injection orifices, and a valve member supported for its reciprocations to settle in and lift off the valve seat. The relationships among dimensions are &phgr;D1+&phgr;d<&phgr;P and t<&phgr;d, where &phgr;D1 is the diameter of the fuel flow path, &phgr;d the diameter of the injection orifices, &phgr;P the diameter of a pitch circle with its center coinciding with the axis of the fuel flow path, and t the depth in the axial direction of the fuel cavity.Type: GrantFiled: November 30, 2001Date of Patent: August 3, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tsuyoshi Munezane, Mamoru Sumida
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Patent number: 6769634Abstract: In a fuel injection nozzle having a nozzle body which body has one first and one second group of injection ports, one first and one second nozzle needle, and one separate pressure chamber for each nozzle needle, so that the injection needles are adjustable independently of one another between a closed position, in which the injection ports associated with the corresponding nozzle needle are closed, and an injection position, in which the corresponding injection ports are opened, a free choice of injection cross sections is to be made possible, while the design is simple. To that end, it is provided that the two nozzle needles adjoin one another.Type: GrantFiled: February 19, 2002Date of Patent: August 3, 2004Assignee: Robert Bosch GmbHInventors: Achim Brenk, Wolfgang Klenk, Uwe Gordon, Manfred Mack
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Patent number: 6769625Abstract: A valve subassembly of a fuel injector that allows spray targeting and distribution of fuel to be configured using non-angled or straight orifice having an axis parallel to a longitudinal axis of the subassembly. Metering orifices are located about the longitudinal axis and defining a first virtual circle greater than a second virtual circle defined by a projection of the sealing surface onto the metering disc so that all of the metering orifices are disposed outside the second virtual circle. The projection of the sealing surface converges at a virtual apex disposed within the metering disc. At least one channel extends between a first end and second end. The first end is disposed at a first radius from the longitudinal axis and spaced at a first distance from the metering disc.Type: GrantFiled: June 6, 2002Date of Patent: August 3, 2004Assignee: Siemens VDO Automotive CorporationInventor: William A. Peterson, Jr.
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Patent number: 6766969Abstract: A valve seat/director unit the combines the functions of an injector valve seat and a separate spray director plate into an integral unit combining both functions. The unit is a generally flat plate having an outer portion with at least one sealing rib. A central portion includes at least one endless rib forming a valve seat and surrounding a spray director including a recessed area communicating with at least one fuel spray opening. Upper surfaces of the sealing rib(s) and valve seat are preferably flat and coplanar with one another for engagement by cooperating surfaces of an injector member and a valve member, respectively.Type: GrantFiled: August 30, 2001Date of Patent: July 27, 2004Assignee: Delphi Technologies, Inc.Inventors: Karl Jacob Haltiner, Jr., Robert B. Perry, Timothy P. Landschoot
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Patent number: 6764027Abstract: A fuel injector for fuel injection systems of internal combustion engines includes a valve needle and a valve-closure member mechanically linked to it, which cooperates with a valve-seat surface situated in a valve-seat member to form a sealing seat, and at least one swirl-producing element which is situated upstream from the sealing seat in the valve-seat member. One or more swirl channels which are open toward the upstream side of the valve-seat member are incorporated into the upstream side of the valve-seat member as a swirl-producing element.Type: GrantFiled: September 24, 2002Date of Patent: July 20, 2004Assignee: Robert Bosch GmbHInventors: Guenter Dantes, Detlef Nowak
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Patent number: 6764031Abstract: A fuel injector for fuel injection systems of internal combustion engines has a valve needle (3) and, mechanically linked thereto, a valve closing body (4), which cooperates with a valve seat surface (6) disposed in a valve seat body (5) to form a sealing seat, and has a plurality of recesses (34), which are introduced in the valve seat body (5) downstream from the sealing seat. Situated downstream on the valve seat body (5) is a flow-through screen (31) in which, for each recess (34), at least one discharge orifice (7) is introduced, whose cross-section is smaller than that of the particular recess (34) and which is positioned such that its inlet cross-section is situated fully within the outlet cross-section of the particular recess (34).Type: GrantFiled: November 6, 2002Date of Patent: July 20, 2004Assignee: Robert Bosch GmbHInventors: Thomas Sebastian, Jens Pohlmann, Martin Maier, Guenter Dantes, Detlef Nowak, Joerg Heyse, Joerg Schlerfer
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Publication number: 20040129806Abstract: A fuel injector (1) for the direct injection of fuel into the combustion chamber of an internal combustion engines includes an actuator (10), a valve needle (3), which is able to be activated by the actuator (10) to actuate a valve-closure member (4), which forms a sealing seat together with a valve-seat surface (6) formed on a valve-seat member (5); and has a plurality of spray-discharge orifices (7) formed in the valve-seat member (5). A groove-type surface structure (34) is formed at an end face (35) of the valve-seat member (5) facing the combustion chamber.Type: ApplicationFiled: February 26, 2004Publication date: July 8, 2004Inventors: G?uuml;nter Dantes, Detlef Nowak
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Patent number: 6758407Abstract: A fuel injector comprising a nozzle body, a first outlet opening having an axis, a second outlet opening having an axis, and means for controlling fuel delivery through the first and second outlet openings. The axes of the first and second outlet openings are arranged so as to intersect one another downstream of the outlet openings such that, when fuel is delivered through both the first and second outlet openings, a combined spray formation is formed which is substantially equivalent to a single spray formation having been delivered from a single opening.Type: GrantFiled: June 8, 2000Date of Patent: July 6, 2004Assignee: Delphi Technologies, Inc.Inventors: Malcolm David Dick Lambert, Simon David Tullis, Godfrey Greeves
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Patent number: 6758420Abstract: A fuel injection valve includes a valve seat member having a valve seat and a valve bore provided through a central portion of the valve seat, and an injector plate coupled to an outer end face of the valve seat member and having a plurality of fuel injection bores arranged in an annular shape surrounding an axis of the valve bore. A fuel diffusion chamber is defined between the valve seat member and the injector plate, and faced by the valve bore and all the fuel injection bores. The plurality of the fuel injection bores are formed in parallel to the axis of the valve bore, and the spreading angle of a fuel spray foam formed by the fuel injected from the fuel injection bores is determined depending on an axis distance between the valve bore and each of the fuel injection bores. Thus, it is possible to determine the spreading angle of the fuel spray foam as desired.Type: GrantFiled: October 23, 2001Date of Patent: July 6, 2004Assignee: Keihin CorporationInventors: Akira Arioka, Koji Kitamura
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Publication number: 20040124278Abstract: A fuel injector (1), especially for the direct injection of fuel into a combustion chamber of an internal combustion engine has an actuator (10) which is in operative connection with a valve needle (3), the valve needle (3) having a valve-closure member (4) at its spray-off end, which cooperates to form a sealing seat together with a valve seat surface (6) which is formed on a valve seat element (5). Valve-closure member (4) reaches through a swirl element (32) which is positioned on a flow-supply side end face (35) of valve seat element (5), swirl channels (33) being formed in swirl element (32). The valve seat element (5) has a ring-shaped elevation (36) on the flow-supply side end face (35) facing the swirl element (32).Type: ApplicationFiled: October 16, 2002Publication date: July 1, 2004Inventor: Heinz Luft
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Publication number: 20040124279Abstract: A fuel injector has a chamber between a valve body and a plate in which a plurality of through holes are formed. The chamber has a diameter larger than that of an opening of the valve body. The through holes are opened at an outer chamber area shaded by the valve body are distanced from an outer wall of the chamber more than a diameter of the through hole. Fuel flowing along an inner inclined surface of the valve body turns to the through holes and flows into the through hole from all directions and collides with each other at inlets of the through hole. Therefore, injected fuel has a lot of turbulences and is finely atomized.Type: ApplicationFiled: July 14, 2003Publication date: July 1, 2004Applicant: DENSO CORPORATIONInventors: Akinori Harata, Yukio Sawada