US3753426A - Balanced pressure fuel valve - Google Patents
Balanced pressure fuel valve Download PDFInfo
- Publication number
- US3753426A US3753426A US00136097A US3753426DA US3753426A US 3753426 A US3753426 A US 3753426A US 00136097 A US00136097 A US 00136097A US 3753426D A US3753426D A US 3753426DA US 3753426 A US3753426 A US 3753426A
- Authority
- US
- United States
- Prior art keywords
- valve
- fuel
- hydraulic cylinder
- fluid
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
Definitions
- a hydraulic fuel valve assembly which equalizes the pressure of fluid at the hydraulic cylinder during the closed-valve condition with the pressure of fuel at the nozzle region, to thereby assure that the hydraulic cylinder is always full and to minimize variations in the force that must be applied by the hydraulic piston when fuel pressure varies.
- the valve assembly includes a passageway connecting the fuel supply line to the nozzle region of the valve, and a channel leading to the hydraulic cylinder to supply pressurized fuel to it.
- a check valve is located along the channel to prevent the flow of fluid out of the hydraulic cylinder when it is highly pressurized during valve opening.
- valve assembly In a valve wherein a fluid other than fuel is employed in the hydraulic cylinder, a bellows or sealed piston is installed in the channel between the check valve and the fuel line to prevent mixing of the hydraulic fluid and the fuel.
- the valve assembly includes a valve body that forms the hydraulic cylinder, and a separate valve insert that contains a valve plunger and an insert housing that defines the valve seat and that limits plunger movement away from the seat, to thereby enable testing and adjustment prior to complete valve assembly.
- One type of fuel valve employs an actuator such as a piezoelectric type whose limited motion is amplified by a hydraulic piston.
- the hydraulic piston has a large diameter so it can pump substantial amounts of fluid along a hydraulic cylinder.
- the hydraulic fluid moves a plunger of small diameter by a substantial distance to open the valve.
- the piezoelectric or other actuator generally must supply a pumping force sufficient to overcome a spring preload that assures that the valve will normally be closed, plus any differential pressure between the pressure of fuel'at the lower end of the valve plunger and the pressure of fluid in the hydraulic cylinder prior to energization of the activator.
- the fluid pressure in the hydraulic cylinder during the valve closed condition always be approximately equal to the pressure of fuel acting on the lower end of the plunger.
- This balancing or equalization of pressures is particularly desirable in the case of engines which supply fuel at a widely variable pressure to permit a wide range of fuel injection rates.
- Such balancing is also desirable where the fuel pressure may remain stable, but where hydraulic fluid pressure may vary. For example, hydraulic pressure may fall if a temperature increase expands the hydraulic cylinder so that the hydraulic fluid cannot completely fill it, or vice versa depending upon the relative coefficients of expansion of fluid and housing.
- Hydraulically actuated valves are often constructed with a main housing member that forms the hydraulic cylinder in which the hydraulic piston moves, and which also forms the slider bearing hole along which the plunger slides. Additional housing members fastened to the main housing member form the valve seat and a stop that limits plunger movement during opening of the valve. This distance which the plunger moves between its open and closed states must be precisely controlled. It would be desirable to be able to test plunger operation to check for proper valve seating, proper opening distance and/or through flow of fuel, and smooth valve sliding, and to make appropriate adjustments, prior to assembling the complete valve.
- Another object is to provide a hydraulic valve assembly which facilitates testing and adjustment of plunger operation prior to complete assembly.
- a hydraulic valve which, in the valve closed condition, assures that the pressure of fluid in the hydraulic cylinder that opens to an inner end of the plunger, equals fuel pressure applied to an outer end of the plunger that moves against the valve seat.
- the valve includes a passageway connecting the fuel supply line to the region where the valve seat and the outer end of the plunger are located.
- a channel connects the passageway to the hydraulic cylinder that opens to the inner end of the plunger.
- a check valve is located along the channel to prevent outflow of fuel from the hydraulic cylinder, which could occur during valve actuation.
- the fuel is utilized as the hydraulic fluid, and the channel assures that the same pressure exists at both ends of the plunger prior to energization of the hydraulic actuator, so that the actuator must supply only a minimum of force to open the valve.
- a bellows is positioned along the channel between the check valve and the fuel line.
- the bellows permits a hydraulic fluid other than the fuel to be employed, by preventing the flow of fuel into the hydraulic cylinder.
- the bellows enables fuel pressure to be applied to the fluid in the hydraulic cylinder to equalize the pressures.
- the hydraulic valve assembly is constructed in a manner that facilitates testing and adjustment of the plunger operation apart from the hydraulic cylinder portion.
- the assembly includes a valve body that forms the hydraulic cylinder and which holds the hydraulic piston and actuator.
- a separate valve insert is provided which includes an insert housing that can be received in the valve body.
- the insert housing forms the bearing hole along which the plunger slides, the valve seat against which the plunger closes, and a ledge that limits travel of the plunger to determine the extent to which the valve is opened.
- a shim is positioned between the ledge and a collar on the plunger, to facilitate precise control of the degree of valve opening.
- the valve insert can be fully tested for the degree of valve opening,,for proper valve seating, and for smooth valve sliding, all apart from the hydraulic cylinder, piston, and actuator apparatus.
- FIG. 1 is a sectional view of a hydraulic fuel valve assembly constructed in accordance with one embodiment of the invention
- FIG. 2 is a view taken on the line 2-2 of FIG. 1;
- FIG. 3 is a simplified view of an engine which utilizes the fuel valve assembly of FIG. 1;
- FIG. 4 is a sectional side view of another valve, similar to that of FIG. 1 but with a larger valve seat and simpler valve insert;
- FIG. 5 is a sectional side view of a hydraulic valve assembly constructed in accordance with still another embodiment of the invention, which employs a bellows to resist mixing of hydraulic fluid and fuel;
- FIG. 6 is a view taken on the line 6-6 of FIG. 5;
- FIG. 7 is a view taken on the line 7-7 of FIG. 5;
- FIG. 8 is a sectional view of a valve assembly constructed in accordance with still another embodiment of the invention, which employs a piston for transferring pressures while sealing the hydraulic fluid from mixing with the fuel.
- FIGS. 1 and 2 illustrate a fuel valve assembly 10 whichcontrols the flow of fuel through a nozzle 12 into the cylinder or inlet port of an internal combustion engine.
- the fuel is supplied under pressure through a fuel supply line 14 to the valve assembly 10, for injection through the nozzle during a short period at every cycle of engine operation.
- Fuel flow through the nozzle 12 is controlled by a plunger assembly 16 that includes upper and lower plunger members 17, 19.
- the lower member 19 has a seating portion 18 that can move against and away from a valve seat 20.
- a spring 21 urges the lower plunger member in an upward direction to close the seating portion on the valve seat 20.
- the upper plunger member 17 is urged in an upward direction away from the lower plunger member, by a Belleville type spring washer 22.
- an actuator 24 such as a piezoelectric or other type moves down a hydraulic piston 26 in a hydraulic cylinder 30
- the piston pressurizes hydraulic fluid at the upper or inner end 28 of the plunger to force down the upper plunger member 17.
- the upper member 17 contacts and depresses the lower plunger member 19 to open the valve to the outflow of fuel through the nozzle 12.
- motion of the actuator is transmitted, with or without amplification, by the piston 26 which compresses the hydraulic fluid to move down the plunger 16.
- the leakage may be very small so that it requires a long time to equalize the pressures. If the pressure of fuel in the supply line 14 should suddenly increase, as can happen particularly in an engine system wherein fuel supply pressure is varied over a wide range, then the much higher fuel pressure applied to the lower or outer portion (regions 31) of the plunger 16 may create such a high preload that the actuator 24 cannot supply enough force to open the valve.
- the fuel valve is constructed to permit the rapid flow of fuel into the hydraulic cylinder 30. This influx of fuel can increase the pressure in the hydraulic cylinder if the fuel supply pressure should increase.
- the valve is constructed with a passageway 32 connected to the fuel supply line 14, which leads to the region of the valve seat 20.
- a channel 36 leads from the passageway 32 to the hydraulic cylinder 30. Fuel can flowthrough the channel 36 to rapidly supply fuel to completely fill the hydraulic cylinder and to transfer any increase in fuel supply pressure to it.
- a check valve 38 is located along the channel 36 to prevent the outflow of fuel from the hydraulic cylinder during the period in each cycle when the actuator 24 is activated to pressurize the hydraulic fluid so as to open the valve.
- the check valve 38 prevents the outflow of fuel from the hydraulic cylinder, so that any outflow must pass along the upper member 17 of the plunger 16.
- the clearance along the upper plunger member 17 is small so that only a small outflow can occur.
- the Belleville washer 22 supplies a sufficiently high spring force to prevent a constant valve opening in this situation and the pressure will soon equalize. It may be noted that the Belleville washer 22 has a substantial preload to assure rapid plunger movement under normal conditions, and this preload is sufficient to prevent a valve open condition when the fuel supply pressure suddenly drops.
- valve assembly 10 is constructed with a main valve body 40 that holds the actuator 24 and a cap 42 thereon, the valve body also forming the hydraulic cylinder 30, the passageway 32 that is connected to the fuel line 14 and the channel 36 that carries the check valve 38.
- a separate valve insert 44 which includes a valve insert housing 46 that can be received in a receiving portion 48 of the main valve body 40.
- the upper plunger member 17 has a central portion 50 that can slide along a bearing hole 52 formed in the valve insert housing 46.
- a valve seat 54 is held at one end of the insert housing'by a cap 56.
- As fuel-receiving groove 51 is formed in the insert housing, and an aperture 53 carries fuel from the groove 51 for passage to the valve seat.
- a pair of seal grooves 55 hold O-rings to prevent the escape of fuel.
- the upper or inner portion 28 of the plunger carries a collar 58 held thereon by a snap ring retainer 60.
- the collar 58 bears against the Belleville washer 22, and the washer bears against a shim 62 that lies against a ledge 64 formed on the insert housing 46.
- the assembled valve insert 44 can be tested under operating conditions on a test set up to check for proper operation, and the shim 62 can be replaced by other shims of slightly different size to achieve proper operation.
- the valve insert 44 can then be inserted into the main valve body 40 to complete the hydraulic fuel valve assembly. Normally, the clearance between the plunger portion 50 and the bearing hole 52 in which it slides, the seating of the valve closing portion 18 on the seat 20, and the distance of plunger travel to the valve open condition will not be affected by the rest of the valve apparatus.
- FIG. 3 illustrates, in highly simplified form, an engine which utilizes the hydraulic fuel valve assembly to supply fuel to flow with air through another valve 63 into a combustion cylinder or chamber 61, where the fuel and air are burned to drive a piston 65 that delivers engine output power.
- Fuel from a fuel tank 67 is pressurized by a pump 68 that delivers the fuel to the fuel valve assembly 10.
- a control 70 varies the pressure supplied by the fuel pump 68.
- the pump 68 may supply fuel over a wide range such as 50 to 500 psi to enable close control of the amount of injected fuel at both very low and very high engine loads.
- valve assembly can be employed in a variety of engine configurations, including those with direct injection where the fuel is injected through a nozzle directly into the cylinder, those where the fuel is injected through the same port as that through which air enters the cylinder, those where fuel is injected into the intake air stream,as well as other types.
- FIG. 4 illustrates a valve constructed in accordance with another embodiment of the invention, which is similar to the valve of FIG. 1 except that the valve seat 20A is formed on the valve insert housing 46A and is of larger size.
- the valve closing portion 18A is correspondingly larger. This enables the plunger 16A to be installed through the bearing hole 52A in the valve insert without the need for an additional valve seat member or cap to hold it in place.
- F lGS. 5 through 7 illustrate a valve assembly 80 constructed in accordance with still another embodiment of the invention, wherein the hydraulic fluid which is pumped to move the valve plunger, is a fluid other than the fuel which is injected through the valve.
- the valve includes a main housing 82 which has a passageway 84 connecting the fuel line 12 to the valve seat for injection of the fuel into the cylinder or air intake port of the engine.
- a channel 88 connects the passageway to a hydraulic cylinder 90.
- the channel 88 has an enlarged region 92 with a bellows 94 therein. The inside of the bellows contains fuel while the outside of the bellows is in contact with hydraulic fluid 96.
- the channel 88 includes a portion 98 that leads from the enlarged region 92 through a check valve 101 to the hydraulic chamber.
- the bellows 94 can expand and contract to equalize the fluid pressure on either side thereof, so as to equalize the pressure of fuel in the channel portion leading to the bellows with the pressure of hydraulic fluid 96 located outside of the bellows and in the hydraulic cylinder.
- the enlarged region 92 of the channel serves as a reservoir for supplying any hydraulic fluid that is required to completely fill the hydraulic cylinder, if the volume of the cylinder should increase more than the volume of fluid therein during heating or cooling of the valve assembly.
- the reservoir provided by the enlarged region 92 also can supply any hydraulic fluid that might leak out of the hydraulic cylinder.
- the plunger assembly is constructed to minimize such leakage.
- the plunger assembly 100 has a narrow region 102 that is sealed by an O-ring 104 to the walls of the slider bearing hole 106 along which the plunger slides, to largely eliminate loss of hydraulic fluid.
- a small flow of hydraulic fluid can occur past an upper plunger portion 107 to a conduit 89 that leads to a portion of the channel 88 between the check valve and the bellows.
- a flange 106 on the plunger can abut a ledge 108 on a housing member 110 to limit the plunger travel during a valve open condition, and thereby control the degree of valve opening.
- a pair of springs 112, 114 urge the valve towards the closed condition.
- a valve closing member 116 can move against a valve seat 118 on a seat member 120 that is held in place by a cap 122.
- FIG. 8 illustrates a fuel valve similar to the valve of FIGS. 5-7, except that a piston is employed that slides along an enlarged region 92 of the second passageway portion 88, instead of a bellows.
- the piston 130 is freely slideable so that it moves in response to any substantial pressure differential between the fuel supply pressure and the pressure of hydraulic fluid in the hydraulic cylinder during the valve closed condition.
- the piston 130 has O-ring seals 132 that resist leakage of fluid across the piston.
- the invention provides a hydraulic fuel valve assembly that maintains a pressure of hydraulic fluid in the hydraulic cylinder that depends upon the pressure of fuel supplied to the valve for controlled flow therethrough.
- the valve serves to keep the hydraulic cylinder completely filled during the valve closed condition.
- the valve also serves to vary the pressure of hydraulic fluid in accordance with variations in pressure of the fuel supplied to the valve for injection, thereby minimizing the force which must be supplied by the actuator to open the valve.
- Variation of hydraulic chamber pressure at the initial or valve closed condition in accordance with variations in fuel pressure is especially important in the case of engines wherein the fuel supply pressure may vary within wide limits.
- the valve achieves these functions by coupling the fuel supply line to the hydraulic cylinder or chamber, to transmit fuel pressure variations to the hydraulic chamber.
- the coupling can allow fuel to move into and out of the hydraulic chamber.
- means such as a bellows or sealed but moveable piston is employed to transmit fluid pressure while sealing against the passage of fluid therethrough.
- An engine comprising:
- valve housing means including a hydraulic cylinder for holding fluid, a slide beefing hole and a valve seat;
- plunger means slideably mounted in said bearing hole and having an inner end portion exposed to fluid in said hydraulic cylinder and an outer end movable against and away from said valve seat;
- said housing means including a passageway coupling said fuel supply line to said valve seat;
- An engine comprising:
- fuel tank means for holding fuel
- hydraulic cylinder means for holding a fluid
- piston means controllably movable against fluid in said cylinder means to pressurize it;
- valve seat means defining a valve seat
- slideably mounted plunger means having a first portion coupled to fluid in said hydraulic cylinder means for movement by the pressure of said fluid, and having a second portion with closing means for alternately seating upon and moving away from said valve seat;
- said means coupling said supply line to said hydraulic cylinder means includes a channel for carrying fuel from said supply line into said hydraulic cylinder, and a check valve disposed along said channel for allowing fuel flow therethrough only in a direction towards said hydraulic cylinder means.
- said means coupling said supply line to said hydraulic cylinder means includes a movable member having opposite sides respectively coupled to said hydraulic cylinder means and to said supply line to move in response to the pressure differential thereacross, said movable member sealed against the flow of fluid from one side thereof to the other, whereby to enable an equalization of pressure while maintaining a fluid other than said fuel in said hydraulic cylinder means.
- An engine comprising:
- a fuel supply line coupled to said fuel tank
- valve housing means including a hydraulic cylinder for holding fuel, a valve seat coupled to said combustion chamber, and a slider bearing hole between said cylinder and seat;
- plunger means slideably mounted in said slider hearing hole, said plunger means having an inner end for receiving the pressure of fluid in said hydraulic cylinder and an outer end, and having valve closing means at said outer end for moving against and away from said valve seat;
- valve housing means defining a passageway coupling said fuel supply line to said valve seat to flow fuel across it when said valve closing means is away from said seat, and a channel leading to said hydraulic cylinder;
- check valve means disposed along said channel, for
- sealed pressure transfer means disposed along said channel on aside ofxsaid check valve means furthest from said hydraulic cylinder, for preventing the transfer of fluid between said fuel supply line and said hydraulic cylinder while raising the pressure of fluid in said hydraulic cylinder in response to increases in the pressure of fuel in said fuel supply line.
- a freely movable piston slideably mounted along a region of said channel which is on a side of said check valve means furthest from said hydraulic cylinder.
- said valve housing means includes a valve body forming said hydraulic cylinder and forming an insertreceiving portion, and an insert housing received in said receiving portion of said valve body and forming said slider bearing hole and said valve seat, said insert housing also forming a ledge at an end of said bearing hole nearest said pump chamber;
- said plunger means has a collar at said inner end for moving towards and away from said ledge; and including a spring washer disposed against said collar on said plunger means;
- An engine comprising:
- means for holding fuel including a fuel supply line
- valve body having a hydraulic cylinder portion, a
- receiving portion in communication with said cylinder portion, and a fuel passage connected to said fuel supply line and leading to said receiving portion;
- valve insert assembly including a housing at least partially received in said receiving portion of said valve body, said housing having walls defining an elongated slider bearing hole with inner and outer end portions respectively nearest and furthest from said piston, said ledge adjacent to said inner portion of said slider bearing hole, and a valve seat adjacent to said outer portion of said slider bearing hole, said valve seat having a first side coupled to said fuel passage and a second side coupled to said combustion chamber; and
- valve plunger means slideably mounted in said bearing hole and having inner and outer portions, said plunger means including a valve seating portion for seating upon and unseating from said valve seat as said valve plunger means moves towards and away from said inner portion of said bearing hole, respectively, and also including a collar at said inner portion of said plunger for moving towards and away from said ledge, so that the maximum valve opening as defined by the maximum distance of said valve seating portion from said valve seat is determined, at least in part, by the length of said housing between said ledge and valve seat in relation to the length of said plunger means between said collar and seating portion, whereby the valve insert can be tested and precisely adjusted for a de' sired maximum valve opening prior to installation in the valve body.
- a shim disposed between said ledge and flange, whereby to facilitate precise adjustment of the maximum valve opening.
- said housing of said insert has a fuel-receiving groove on its outside for holding fuel between the housing and said valve body, a pair of seal-receiving grooves on its outside at either end of said fluidreceiving grooves, and an aperture leading from said fluid-receiving groove to said bearing hole to carry fuel for flowing to said valve seat, and said insert includes a pair of elastomeric seal rings disposed in said seal-receiving grooves;
- said fuel passage is coupled to said fuel receiving groove for carrying fuel thereto.
- valve assembly described in claim 13 including:
- check valve means disposed along said channel for allowing fuel flow only toward said hydraulic cylinder portion, whereby to vary the initial force tending to open said valve in accordance with fuel supply pressure.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Fluid-Driven Valves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13609771A | 1971-04-21 | 1971-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3753426A true US3753426A (en) | 1973-08-21 |
Family
ID=22471279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00136097A Expired - Lifetime US3753426A (en) | 1971-04-21 | 1971-04-21 | Balanced pressure fuel valve |
Country Status (10)
Country | Link |
---|---|
US (1) | US3753426A (de) |
AU (1) | AU460960B2 (de) |
BR (1) | BR7202380D0 (de) |
CA (1) | CA961362A (de) |
DE (1) | DE2219452C3 (de) |
ES (1) | ES401991A1 (de) |
FR (1) | FR2136575A5 (de) |
GB (1) | GB1324668A (de) |
IT (1) | IT960338B (de) |
SE (1) | SE374943B (de) |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3839943A (en) * | 1972-06-23 | 1974-10-08 | Sopromi Soc Proc Modern Inject | Electromagnetic injector with assist |
US3935853A (en) * | 1973-09-11 | 1976-02-03 | Regie Nationale Des Usines Renault | Internal combustion engine cold-start fuel injector |
US4164326A (en) * | 1978-04-06 | 1979-08-14 | General Motors Corporation | Electromagnetic fuel injector nozzle assembly |
US4168689A (en) * | 1977-06-08 | 1979-09-25 | Caterpillar Tractor Co. | Fuel injector internal passages and filter |
US4300873A (en) * | 1979-05-12 | 1981-11-17 | Lucas Industries Limited | Fuel injection systems |
US4432699A (en) * | 1982-05-04 | 1984-02-21 | The Abet Group | Peristaltic piezoelectric pump with internal load sensor |
US4449893A (en) * | 1982-05-04 | 1984-05-22 | The Abet Group | Apparatus and method for piezoelectric pumping |
US4519751A (en) * | 1982-12-16 | 1985-05-28 | The Abet Group | Piezoelectric pump with internal load sensor |
US4649886A (en) * | 1982-11-10 | 1987-03-17 | Nippon Soken, Inc. | Fuel injection system for an internal combustion engine |
US4660523A (en) * | 1984-11-09 | 1987-04-28 | Robert Bosch Gmbh | Piezoelectric control block |
US4662338A (en) * | 1981-02-17 | 1987-05-05 | Robert Bosch Gmbh | Fuel injection nozzle |
US4735185A (en) * | 1985-06-14 | 1988-04-05 | Nippondenso Co., Ltd. | Apparatus for feeding high-pressure fuel into engine cylinder for injection control |
US5121730A (en) * | 1991-10-11 | 1992-06-16 | Caterpillar Inc. | Methods of conditioning fluid in an electronically-controlled unit injector for starting |
US5168855A (en) * | 1991-10-11 | 1992-12-08 | Caterpillar Inc. | Hydraulically-actuated fuel injection system having Helmholtz resonance controlling device |
US5176115A (en) * | 1991-10-11 | 1993-01-05 | Caterpillar Inc. | Methods of operating a hydraulically-actuated electronically-controlled fuel injection system adapted for starting an engine |
US5181494A (en) * | 1991-10-11 | 1993-01-26 | Caterpillar, Inc. | Hydraulically-actuated electronically-controlled unit injector having stroke-controlled piston and methods of operation |
US5191867A (en) * | 1991-10-11 | 1993-03-09 | Caterpillar Inc. | Hydraulically-actuated electronically-controlled unit injector fuel system having variable control of actuating fluid pressure |
US5271371A (en) * | 1991-10-11 | 1993-12-21 | Caterpillar Inc. | Actuator and valve assembly for a hydraulically-actuated electronically-controlled injector |
US5471959A (en) * | 1994-08-31 | 1995-12-05 | Sturman; Oded E. | Pump control module |
US5593134A (en) * | 1995-02-21 | 1997-01-14 | Applied Power Inc. | Magnetically assisted piezo-electric valve actuator |
US5630440A (en) * | 1995-02-21 | 1997-05-20 | Applied Power Inc. | Piezo composite sheet actuated valve |
US5651345A (en) * | 1995-06-02 | 1997-07-29 | Caterpillar Inc. | Direct operated check HEUI injector |
US5845852A (en) * | 1995-06-02 | 1998-12-08 | Caterpillar Inc. | Direct operated check injector |
US6085991A (en) * | 1998-05-14 | 2000-07-11 | Sturman; Oded E. | Intensified fuel injector having a lateral drain passage |
US6148778A (en) * | 1995-05-17 | 2000-11-21 | Sturman Industries, Inc. | Air-fuel module adapted for an internal combustion engine |
US6152111A (en) * | 1996-05-09 | 2000-11-28 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
US6161770A (en) * | 1994-06-06 | 2000-12-19 | Sturman; Oded E. | Hydraulically driven springless fuel injector |
US6257499B1 (en) | 1994-06-06 | 2001-07-10 | Oded E. Sturman | High speed fuel injector |
US6570474B2 (en) | 2000-02-22 | 2003-05-27 | Siemens Automotive Corporation | Magnetostrictive electronic valve timing actuator |
US6676030B2 (en) | 2000-10-11 | 2004-01-13 | Siemens Automotive Corporation | Compensator assembly having a flexible diaphragm for a fuel injector and method |
US20040069874A1 (en) * | 2000-11-13 | 2004-04-15 | Czimmek Perry Robert | Magneto-hydraulic compensator for a fuel injector |
US6749127B2 (en) | 2002-02-11 | 2004-06-15 | Siemens Vdo Automotive Corporation | Method of filling fluid in a thermal compensator |
US20090114292A1 (en) * | 2007-11-01 | 2009-05-07 | Caterpillar Inc. | Valve assembly |
US7721716B1 (en) * | 2008-07-16 | 2010-05-25 | Harwood Michael R | High pressure piezoelectric fuel injector |
US8500036B2 (en) | 2010-05-07 | 2013-08-06 | Caterpillar Inc. | Hydraulically amplified mechanical coupling |
US9284930B2 (en) | 2011-06-03 | 2016-03-15 | Michael R. Harwood | High pressure piezoelectric fuel injector |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT407428B (de) * | 1989-04-12 | 2001-03-26 | Avl Verbrennungskraft Messtech | Hydraulisch betätigbares ventil mit steuerbarem hub |
AT410124B (de) * | 1989-05-24 | 2003-02-25 | Avl Verbrennungskraft Messtech | Vorrichtung zur steuerung des hubes eines hydraulisch betätigbaren ventiles |
JP4038941B2 (ja) * | 1999-08-02 | 2008-01-30 | 株式会社デンソー | ピエゾインジェクタ |
Citations (1)
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US3501099A (en) * | 1967-09-27 | 1970-03-17 | Physics Int Co | Electromechanical actuator having an active element of electroexpansive material |
-
1971
- 1971-04-21 US US00136097A patent/US3753426A/en not_active Expired - Lifetime
-
1972
- 1972-04-12 AU AU41030/72A patent/AU460960B2/en not_active Expired
- 1972-04-19 BR BR2380/72A patent/BR7202380D0/pt unknown
- 1972-04-20 CA CA140,174A patent/CA961362A/en not_active Expired
- 1972-04-20 DE DE2219452A patent/DE2219452C3/de not_active Expired
- 1972-04-20 SE SE7205159A patent/SE374943B/xx unknown
- 1972-04-21 FR FR7214109A patent/FR2136575A5/fr not_active Expired
- 1972-04-21 IT IT89597/72A patent/IT960338B/it active
- 1972-04-21 ES ES401991A patent/ES401991A1/es not_active Expired
- 1972-04-21 GB GB1867272A patent/GB1324668A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3501099A (en) * | 1967-09-27 | 1970-03-17 | Physics Int Co | Electromechanical actuator having an active element of electroexpansive material |
Cited By (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3839943A (en) * | 1972-06-23 | 1974-10-08 | Sopromi Soc Proc Modern Inject | Electromagnetic injector with assist |
US3935853A (en) * | 1973-09-11 | 1976-02-03 | Regie Nationale Des Usines Renault | Internal combustion engine cold-start fuel injector |
US4168689A (en) * | 1977-06-08 | 1979-09-25 | Caterpillar Tractor Co. | Fuel injector internal passages and filter |
US4164326A (en) * | 1978-04-06 | 1979-08-14 | General Motors Corporation | Electromagnetic fuel injector nozzle assembly |
US4300873A (en) * | 1979-05-12 | 1981-11-17 | Lucas Industries Limited | Fuel injection systems |
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US7721716B1 (en) * | 2008-07-16 | 2010-05-25 | Harwood Michael R | High pressure piezoelectric fuel injector |
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Also Published As
Publication number | Publication date |
---|---|
IT960338B (it) | 1973-11-20 |
CA961362A (en) | 1975-01-21 |
FR2136575A5 (de) | 1972-12-22 |
DE2219452B2 (de) | 1974-08-01 |
AU4103072A (en) | 1973-10-18 |
SE374943B (de) | 1975-03-24 |
AU460960B2 (en) | 1975-04-21 |
DE2219452C3 (de) | 1975-03-20 |
ES401991A1 (es) | 1975-03-01 |
DE2219452A1 (de) | 1972-11-09 |
BR7202380D0 (pt) | 1973-05-24 |
GB1324668A (en) | 1973-07-25 |
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