Source: http://www.google.fr/patents/US5628293?hl=fr
Timestamp: 2013-05-19 10:26:57
Document Index: 792970678

Matched Legal Cases: ['Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08']

Brevet US5628293 - Electronically-controlled fluid injector system having pre-injection ... - Google�BrevetsRecherche Images Maps Play YouTube Actualit�s Gmail Drive Plus » Recherche avanc�e dans les brevets | Historique Web | Connexion Recherche avanc�e dans les brevets BrevetsAn improved electronically-controlled fluid injector system comprises a fluid storage chamber and a direct-operated check. Pressurization of fluid in the storage chamber begins before the start of fluid injection. Fluid injection begins by hydraulically unbalancing the check. Fluid injection sharply...http://www.google.fr/patents/US5628293?utm_source=gb-gplus-shareBrevet US5628293 - Electronically-controlled fluid injector system having pre-injection pressurizable fluid storage chamber and direct-operated check Num�ro de publicationUS5628293 AType de publicationOctroi Num�ro de demande08/524,144 Date de publication13 mai 1997 Date de d�p�t31 ao�t 1995 Date de priorit�13 mai 1994Autre r�f�rence de publicationUS5551398 InventeursHoward N. CannonDennis H. GibsonGregory W. HeflerRonald D. ShinogleMark F. Sommars Cessionnaire d'origineCaterpillar Inc. Classification aux �tats-Unis123/446239/585.2239/88123/506 Classification internationaleF02M57/02F02M59/46F02M59/10F02M57/00F02M47/02F02M59/20F02M59/36F02M59/00 Classification coop�rativeF02M63/0017F02M63/0015F02M59/466F02M63/0064F02M59/102F02M59/366F02B2275/14F02M57/02F02M63/0061F02M47/027F02M63/0047F02M57/023F02M63/0049 Classification europ�enneF02M63/00E2B1F02M63/00E10BF02M63/00E4HF02M59/46EF02M59/10BF02M47/02DF02M57/02C1F02M57/02F02M59/36DF02M63/00E10FF02M63/00E2BF02M63/00E4GR�f�rencesCitations de brevets (90)Citations hors brevets (32) R�f�renc� par (38)Liens externesUSPTO Cession USPTO EspacenetElectronically-controlled fluid injector system having pre-injection pressurizable fluid storage chamber and direct-operated checkUS 5628293 A R�sum� An improved electronically-controlled fluid injector system comprises a fluid storage chamber and a direct-operated check. Pressurization of fluid in the storage chamber begins before the start of fluid injection. Fluid injection begins by hydraulically unbalancing the check. Fluid injection sharply ends by hydraulically balancing the check to allow a biasing device to close the check. The present invention provides improved control of several fluid injection parameters, including higher peak fluid injection capability and less fluid injection pressure drop at the end of injection, resulting in improved engine performance and lower emissions, noise, and wear.
We claim: 1. An electronically-controlled unit fluid pump injector comprising: a housing portion defining a fluid control passage and a fluid storage chamber; a first pressure control valve operable to selectively open and close fluid communication between the storage chamber and the control passage; a nozzle portion defining a pressure control chamber and at least one fluid injection orifice; a fluid pressurization member selectively movable between a first position and a second position, when the first valve is opened said member operable during movement from its first to second positions for displacing fluid from the storage chamber to the control passage, when the first valve is closed said member operable during movement from its first to second positions for displacing fluid in the storage chamber thereby pressurizing such fluid to a selected pressure; a movable direct-operated check operable to selectively close and open fluid communication between the storage chamber and the fluid injection orifice, said check having a first end portion and a second end portion, said first end portion defining a first effective area arranged in partial fluid communication with the storage chamber when the check is closed, said first effective area arranged in complete fluid communication with the storage chamber when the check is opened, said second end portion defining a second effective area arranged in fluid communication with the pressure control chamber; and a second pressure control valve selectively movable between a first position and a second position, said second valve at its first position closing fluid communication between the pressure control chamber and the control passage and opening fluid communication between the pressure control chamber and the storage chamber, said second valve at its second position opening fluid communication between the pressure control chamber and the control passage and closing fluid communication between the pressure control chamber and the storage chamber, when the check is closed and the second valve is at its second position said first and second effective areas are operable for hydraulically opening the check, when the check is opened and the second valve is at its first position said first and second effective areas are operable for balancing opposing hydraulic forces acting on such effective areas.
2. An electronically-controlled unit fluid pump injector comprising: a housing portion defining a fluid control passage and a fluid storage chamber; a first pressure control valve selectively movable between a first position opening fluid communication between the storage chamber and the control passage and a second position blocking fluid communication between the storage chamber and the control passage; a nozzle portion defining a pressure control chamber and at least one fluid injection orifice; a fluid pressurization member selectively movable between a first position and a second position, when the first valve is at its first position said member operable during movement from its first to second positions for displacing fluid from the storage chamber to the control passage, when the first valve is at its second position said member operable during movement from its first to second positions for displacing fluid in the storage chamber thereby pressurizing such fluid to a selected pressure; a direct-operated check selectively movable between a first position blocking fluid communication between the storage chamber and the fluid injection orifice and a second position opening fluid communication between the storage chamber and the fluid injection orifice, said check having a first end portion and a second end portion, said first end portion defining a first effective area arranged in fluid communication with the storage chamber when the check is at its second position, said second end portion defining a second effective area arranged in fluid communication with the pressure control chamber; and a second pressure control valve selectively movable between a first position and a second position, said second valve at its first position blocking fluid communication between the pressure control chamber and the control passage and opening fluid communication between the pressure control chamber and the storage chamber, said second valve at its second position opening fluid communication between the pressure control chamber and the control passage and blocking fluid communication between the pressure control chamber and the storage chamber, when the check is at its first position and the second valve is at its second position said first and second effective areas are operable for hydraulically moving the check towards its second position, when the check is at its second position and the second valve is at its first position said first and second effective areas are operable for balancing opposing hydraulic forces acting on such effective areas.
12. An electronically-controlled unit fuel pump injector comprising: a housing portion defining a fuel control passage and an integral fixed-volume fuel storage chamber; an electronically-controlled first pressure control valve positioned in the storage chamber, said first valve selectively movable between a de-energizeable first position opening fluid communication between the storage chamber and the control passage and an energizeable second position blocking fluid communication between the storage chamber and the control passage; a nozzle portion defining a bore, an injection chamber arranged in continuous fluid communication with the storage chamber, a separate pressure control chamber separate from the injection chamber, a tip seat, and at least one fuel injection orifice; a reciprocal fuel pressurization plunger positioned in the storage chamber, said plunger selectively movable between a first position and a second position, when the first valve is at its first position said plunger operable during movement from its first to second positions for displacing fuel from the storage chamber to the control passage, when the first valve is at its second position said plunger operable during movement from its first to second positions for displacing fuel in the storage chamber thereby pressurizing such fuel to a selected variable pressure; a direct-operated check positioned in the bore of the nozzle portion and selectively movable between a first position blocking fluid communication between the storage chamber and the fuel injection orifice and a second position opening fluid communication between the storage chamber and the fuel injection orifice, said check having a first end portion and a second end portion, said first end portion defining a first effective area arranged in partial fluid communication with the injection chamber when the check is at its first position, said first effective area arranged in complete fluid communication with the injection chamber when the check is at its second position, said second end portion defining a second effective area arranged in fluid communication with the pressure control chamber; a first spring operable for biasing the check towards its first position; an electronically-controlled second pressure control valve selectively movable between a de-energizeable first position and an energizeable second position, said second valve at its first position blocking fluid communication between the pressure control chamber and the control passage and opening fluid communication between the pressure control chamber and the injection chamber, said second valve at its second position opening fluid communication between the pressure control chamber and the control passage and blocking fluid communication between the pressure control chamber and the injection chamber, when the check is at its first position and the second valve is at its second position said first and second effective areas are operable for hydraulically moving the check towards its second position, when the check is at its second position and the second valve is at its first position said first and second effective areas are operable for balancing opposing hydraulic forces acting on such effective areas thereby allowing the first spring to move the check towards its first position; and a second spring operable for biasing both the first and second pressure control valves towards their respective first positions.
13. An electronically-controlled fuel injection system adapted for an engine comprising: a housing defining a fuel control passage and a fuel storage chamber; a first pressure control valve operable to selectively open and close fluid communication between the storage chamber and the control passage; a fuel pressurization member selectively movable between a first position and a second position, when the first valve is opened said member operable during movement from its first to second positions for displacing fuel from the storage chamber to the control passage, when the first valve is closed said member operable during movement from its first to second positions for displacing fuel in the storage chamber thereby pressurizing such fuel to a selected pressure; an actuation device operable for selectively actuating the member for movement between its first and second positions; an electronically-controlled injector including a nozzle portion and a movable direct-operated check, said nozzle portion defining a pressure control chamber and at least one fuel injection orifice, said check operable to selectively close and open fluid communication between the storage chamber and the fuel injection orifice, said check having a first end portion and a second end portion, said first end portion defining a first effective area arranged in partial fluid communication with the storage chamber when the check is closed, said first effective area arranged in complete fluid communication with the storage chamber when the check is opened, said second end portion defining a second effective area arranged in fluid communication with the pressure control chamber; and a second pressure control valve selectively movable between a first position and a second position, said second valve at its first position closing fluid communication between the pressure control chamber and the control passage and opening fluid communication between the pressure control chamber and the storage chamber, said second valve at its second position opening fluid communication between the pressure control chamber and the control passage and closing fluid communication between the pressure control chamber and the storage chamber, when the check is closed and the second valve is at its second position said first and second effective areas are operable for hydraulically opening the check, when the check is opened and the second valve is at its first position said first and second effective areas are operable for balancing opposing hydraulic forces acting on such effective areas.
21. A method of operating an electronically-controlled unit fuel pump injector comprising the steps of: opening fluid communication between a fixed-volume fuel storage chamber and a control passage; closing fluid communication between the storage chamber and at least one fuel injection orifice; displacing a variably-selected volume of fuel from the storage chamber to the control passage; closing fluid communication between the storage chamber and the control passage; displacing another variably-selected volume of fuel in the storage chamber and thereby pressurizing the fuel to a selected pressure; opening fluid communication between the storage chamber and the fuel injection orifice to begin fuel injection; and closing fluid communication between the storage chamber and the fuel injection orifice to end fuel injection.
22. A method of operating an electronically-controlled unit fuel pump injector comprising the steps of: opening fluid communication between a fixed-volume fuel storage chamber and a control passage; closing a check to block fluid communication between the storage chamber and at least one fuel injection orifice; displacing a variably-selected volume of fuel from the storage chamber to the control passage; closing fluid communication between the storage chamber and the control passage; displacing another variably-selected volume of fuel in the storage chamber and thereby pressurizing the fuel to a selected pressure; biasing the check towards a closed position blocking fluid communication between the storage chamber and the fuel injection orifice; hydraulically-unbalancing the check for movement towards an opened position opening fluid communication between the storage chamber and the fuel injection orifice; and hydraulically-balancing the check and allowing the biased check to move to the closed position.
23. A fuel injector for injecting fuel into a combustion chamber of an engine during an injection sequence, comprising: an injector body having an injector orifice; and means disposed in the injector body for injecting pressurized fuel through the orifice into the combustion chamber at a selectable point in the injection sequence including a check having first and second check ends and movable between an open position at which fuel is injected into the combustion chamber and a closed position at which the flow of pressurized fuel into the combustion chamber is blocked and means for selectively applying either a low fluid pressure or a high fluid pressure directly to each of the first and second ends to move the check between the open and closed positions.
43. A method of injecting fuel into a combustion chamber of an internal combustion engine using a fuel injector having an injector body, a check disposed in the injector body and movable between injecting and non-injecting positions, a spring urging the check into the non-injecting position and means coupled to the check ends for selectively coupling either high or low fluid pressures thereto, comprising the steps of: (a.) controlling the coupling means to cause the high fluid pressure to be applied to the first and second check ends; (b.) thereafter controlling the coupling means to cause the low fluid pressure to be applied to the first check end while the high fluid pressure is being applied to the second check end so that the check is moved to the injecting position against the urging of the spring; and (c.) thereafter controlling the coupling means to cause the high fluid pressure to be applied to the first and second check ends so that the check is moved to the non-injecting position in response to the urging of the spring.
50. A method of injecting fuel into a combustion chamber of an internal combustion engine using a unit injector having an injector body, a high pressure storage volume disposed in the injector body, a plunger extending into the high pressure storage volume and movable to pressurize fuel therein, a check disposed in the injector body having first and second check ends of substantially equal effective cross-sectional dimensions and movable between injecting and non-injecting positions, a pressure control valve in fluid communication with the high pressure storage volume and a poppet valve in fluid communication between the check ends and the high pressure storage volume and a source of low fluid pressure, comprising the steps of: (a.) providing a solenoid in the injector body having a first armature coupled to the pressure control valve, a second armature coupled to the poppet valve and a winding energizable to cause the armatures to be displaced relative to one another; (b.) energizing the winding as the plunger is moving into the high pressure storage volume to cause the pressure control valve to close the high pressure storage volume and pressurize fuel therein; (c.) deenergizing the winding to place the first and second check ends in fluid communication with the high pressure storage volume; and (d.) energizing the winding again to place the first check end in fluid communication with the source of low fluid pressure and the second check end in fluid communication with the high pressure storage volume so that a pressure differential across the check moves the check to the injecting position and initiates fuel injection.
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(Robert Bosch G.m.b.H.) Apr. 28 29, 1994.215th Annual Vienna Motor Symposium, pp. 36-53, Common Rail Injection System for Diesel Engines-Analysis, Potential Future, by Egger et al. (Robert Bosch G.m.b.H.) Apr. 28-29, 1994.315th Annual Vienna Motor Symposium, pp. 54 79, Common Rail Injection Systems with Characteristics Independent of Engine Speed and With High Injection Pressure Diesel Engine Potential for the Future, by Prescher et al. (IMH Institut fur Motorenbau Prof. Huber GmbH) Apr. 28 29, 1994.415th Annual Vienna Motor Symposium, pp. 54-79, Common Rail Injection Systems with Characteristics Independent of Engine Speed and With High Injection Pressure-Diesel Engine Potential for the Future, by Prescher et al. (IMH-Institut fur Motorenbau Prof. Huber GmbH) Apr. 28-29, 1994.515th Annual Vienna Motor Symposium, pp. 96 115, Latest Findings in Development of High Speed Direct Injection (HSDI) Diesel Engines in Passenger Vehicles by Cichocki et al. (AVL. List GmbH) Apr. 28 29, 1994.615th Annual Vienna Motor Symposium, pp. 96-115, Latest Findings in Development of High-Speed Direct Injection (HSDI) Diesel Engines in Passenger Vehicles by Cichocki et al. (AVL.--List GmbH) Apr. 28-29, 1994.7Proc. Instn. Mech. Engrs., vol. 204 The Injection Equipment of Future High Speed Di Diesel Engines with Respect to Power an Pollution Requirements by Dolenc (Monobloc Dieselmotoren G.m.b.H.), Mar 20, 1990.8Proc. Instn. Mech. Engrs., vol. 204 The Injection Equipment of Future High-Speed Di Diesel Engines with Respect to Power an Pollution Requirements by Dolenc (Monobloc Dieselmotoren G.m.b.H.), Mar 20, 1990.9SAE Paper No. 840273 Direct Digital Control of Electronic Unit Injectors by Beck et al. (BKM, Inc.) Feb. 27 Mar. 2, 1984.10SAE Paper No. 840273 Direct Digital Control of Electronic Unit Injectors by Beck et al. (BKM, Inc.) 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(Renault Vehicules Industriels), Feb. 25-Mar. 1, 1991.15SAE Paper No. 910252 Development of New Electronically Controlled Fuel Injection System ECD U2 for Diesel Engines by Miyaki et al (Nippondenso Co., Ltd.), 1991.16SAE Paper No. 910252 Development of New Electronically Controlled Fuel Injection System ECD-U2 for Diesel Engines by Miyaki et al (Nippondenso Co., Ltd.), 1991.17SAE Paper No. 940897, Reducing Particulate and NOx Emissions by Using Multiple Injections in a Heavy Duty D.I. Diesel Engine, by Tow et al. (U. of Wisconsin Madison), Feb. 28 Mar. 3, 1994.18SAE Paper No. 940897, Reducing Particulate and NOx Emissions by Using Multiple Injections in a Heavy Duty D.I. Diesel Engine, by Tow et al. (U. of Wisconsin-Madison), Feb. 28-Mar. 3, 1994.19Servojet Electronic Fuel Injection HSV High Speed Solenoid Valves four page excerpt reprinted from vol. 50, Diesel & Gas Turbine Worldwide Catalog, 1985 edition.20Thesis for Master of Science degree Mechanical Engineering, The Effect of Multiple Pulse Injection, Injection Rate and Injection Pressure on Particulate and NOx Emissions from A D.I. Diesel Engine, by Tryg C. Tow (University of Wisconsin Madison) 1993.21Thesis for Master of Science degree--Mechanical Engineering, The Effect of Multiple Pulse Injection, Injection Rate and Injection Pressure on Particulate and NOx Emissions from A D.I. Diesel Engine, by Tryg C. Tow (University of Wisconsin-Madison) 1993.22U.S. Application No. 08/172,881 filed Dec. 23, 1993 entitled "Electronically-Controlled Fluid Injector System Having Pre-Injection Pressurizable Fluid Storage Chamber and Direct-Operated Check".23U.S. Application No. 08/172,881 filed Dec. 23, 1993 entitled Electronically Controlled Fluid Injector System Having Pre Injection Pressurizable Fluid Storage Chamber and Direct Operated Check .24U.S. Application No. 08/172,881 filed Dec. 23, 1993 Force Balanced Direct Operated Flow Check for Fuel Injection Nozzle (Gison et al.).25U.S. Application No. 08/172,881 filed Dec. 23, 1993 Force-Balanced Direct Operated Flow Check for Fuel Injection Nozzle (Gison et al.).26U.S. Application No. 08/236,406 filed May 2, 1994 Method and Apparatus for Reducing Cavitation and Dynamic Force Imbalance in Hydraulic Valving (Gibson).27U.S. Application No. 08/282,136 filed Jul. 28, 1994 entitled "Plunger Retention".28U.S. Application No. 08/282,136 filed Jul. 28, 1994 entitled Plunger Retention .29U.S. Application No. 08/282,258 filed Jul. 29, 1994 entitled "Efficient Mixing Nozzle".30U.S. Application No. 08/282,258 filed Jul. 29, 1994 entitled Efficient Mixing Nozzle .31U.S. Application No. 08/283,232 filed Jul. 29, 1994 entitled "Check Controlled Heui with Hydraulic Energy Recovery".32U.S. Application No. 08/283,232 filed Jul. 29, 1994 entitled Check Controlled Heui with Hydraulic Energy Recovery . 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