WO2003004858A1 - Kraftstoffinjektor mit variabler steuerraumdruckbeaufschlagung - Google Patents
Kraftstoffinjektor mit variabler steuerraumdruckbeaufschlagung Download PDFInfo
- Publication number
- WO2003004858A1 WO2003004858A1 PCT/DE2002/002235 DE0202235W WO03004858A1 WO 2003004858 A1 WO2003004858 A1 WO 2003004858A1 DE 0202235 W DE0202235 W DE 0202235W WO 03004858 A1 WO03004858 A1 WO 03004858A1
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- Prior art keywords
- valve
- chamber
- inlet
- channel
- pressure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0056—Throttling valves, e.g. having variable opening positions throttling the flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/28—Details of throttles in fuel-injection apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0045—Three-way valves
Definitions
- control rooms are integrated in the housing of the fuel injectors, the pressure relief of which enables a nozzle needle or a plunger to be actuated for indirect nozzle needle actuation, for releasing or for closing injection openings.
- the control chamber can be acted upon by a high-pressure fuel volume from the high-pressure source via an inlet throttle.
- EP 0 994 248 A2 relates to a fuel injector with injection course shaping by piezoelectric control of the nozzle needle stroke.
- a fuel injector includes a cylinder body on which an injection opening is formed.
- a nozzle needle is movably received in the injector body and moves along a stroke path between an open position in which the injection openings are open and a closed position in which the injection openings are closed.
- a piezoelectric actuator is accommodated in the injector body, the piezo element of which can be switched back and forth between an on and an off position.
- the nozzle needle and the piezoelectric actuator are coupled to one another in such a way that the movement of the piezo element of the piezoelectric actuator tors is translated into a larger axial stroke movement of the nozzle needle in the injector housing.
- DE 197 15 234 AI relates to a solenoid-controlled, direct-injection fuel injection valve for accumulator injection systems of multi-cylinder internal combustion engines.
- a feed line leads to a spring-loaded nozzle needle, the feed line being able to be shut off by a control piston with a valve function.
- a nozzle needle is provided which is supported in a spring chamber and presses the nozzle needle onto its needle seat.
- a control chamber is arranged on the rear side of the control piston, which is under system pressure.
- a solenoid valve is provided, through which the control chamber can be connected to a relief line and, at the same time, the injection line can be shut off by a high-pressure valve arranged on the control piston.
- a throttled line connection is provided as a bypass between the supply line and the relief line, the line connection containing a leakage valve which is operatively connected to the solenoid valve and through which the line connection can be interrupted during the injection.
- a fuel injection valve for internal combustion engines.
- a fuel injection valve is proposed with an axially displaceable valve member arranged in a valve body, which has a conical valve sealing surface at its end facing the combustion chamber of the internal combustion engine, with which it interacts with a conical valve seat surface on the valve body for controlling an injection cross section.
- the valve member is slidably guided on an internal guide on a pin of a fixed insert body.
- valve member has a guide bore with which it is slidably guided on a pin of a stationary insert body.
- valve chamber of a multi-way valve and the pressure increase or pressure reduction or pressure reduction in a control chamber that generates the opening and closing movement of a nozzle needle / tappet arrangement via at least one in the inlet direction and in the outlet direction with respect to the control chamber from Control volume flow channels are interconnected.
- a 3/3 directional control valve is used as a multi-way valve, the valve body of which is enclosed by a valve chamber into which the mouth of an additional inlet from the high-pressure collecting chamber opens.
- the valve body of the multi-way valve can be switched between two valve seats in the valve chamber and can also be positioned in an intermediate position between the two valve seats by means of an actuator (e.g. a piezo actuator).
- the control chamber is quickly relieved of pressure via the throttle elements designed with a sufficient cross-section and accommodated in the channels. If, on the other hand, the valve body is actuated in its second valve seat, one of the channels between the valve chamber and the control chamber is closed, so that the pressure in the control chamber is reduced more slowly, which favors the shaping of the injection process.
- valve body of the 3/3 -way valve has moved into its first valve seat, pressure builds up in the control chamber via a permanently acting inlet throttle opening directly in the control chamber and the two channels extending from the valve chamber to the control chamber, which via the in the inlet, which opens into the angular space, is acted upon by an integrated inlet throttle, so that pressure builds up quickly in the control chamber.
- the mouth of the further inlet on the high-pressure side from the high-pressure collecting chamber can also be placed in one of the channels connecting the valve chamber of the multi-way valve behind the control chamber.
- the mouth of the further inlet from the high-pressure collection space can be placed in that of the channels, which can be closed by the valve body of the multi-way valve.
- a diffuser section is formed between the mouth of the further inlet into this channel and the throttle element accommodated in this channel, the length of which is fixed in such a way that the fuel flow forming in this channel is able to contact the wall of the channel.
- 1 shows an embodiment variant of a variable control chamber pressure loading
- FIG. 2 shows an embodiment variant with a 3/2-way valve and a further inlet from the high-pressure collection chamber and into one of the channels
- FIG. 3 shows an injector body with an inlet throttle element which can be acted upon in parallel by an inlet on the high-pressure side
- FIG. 4 shows a further embodiment variant with only one valve chamber.
- control chamber of a fuel injector is loaded or relieved by a multi-way valve designed here as a 3/3-way valve.
- a control chamber 5 is formed in an injector housing 2 of an injector 1 and is acted upon by fuel under high pressure via a permanently acting first inlet throttle 4, which adjoins a bore 12 branching off with the inlet from the high-pressure collecting chamber.
- the control room 5 within the injector housing 2 is delimited laterally by a control room wall 6 and a control room surface 7 on the upper side.
- a nozzle needle / tappet arrangement 8 dips into the control chamber 5 with its end face 9, which, depending on the pressure reduction or pressure build-up in the control chamber 5, can be moved in a direction of movement indicated by the double arrow 10.
- the multi-way valve 13 - designed as a 3/3-way valve in the illustration according to FIG. 1 - comprises a closing valve body 14, which can be adjusted in several positions in accordance with an actuator control 22 within the valve chamber 20 by means of a transmission element identified by reference number 31.
- the Ventilkö ⁇ er 14 of the multi-way valve 13 is adjustable in a first valve seat 15, the valve seat diameter is designated by reference numeral 16;
- valve seat 15 can be spherical, can be placed in a second valve seat 17, which is formed in the valve seat diameter 18 and is arranged opposite in the first valve seat 15 in the valve chamber 20.
- the Ventilgro ⁇ er 14 of the multi-way valve 13 can be placed in a central position 19 between the first valve seat 15 and the second valve seat 17 within the valve chamber 20.
- a bore is provided which is penetrated by the transmission element 31 actuating the valve body 14.
- an annular gap 24 is formed between the peripheral surface of the transmission element 31 and the wall of the injector housing 2 delimiting the bore, from which an outlet (23) branches off.
- the valve chamber 20 of the multi-way valve 13 is connected to the control chamber 5 of the injector housing 2 via two channels, the first channel 25 and the second channel 28, which are arranged parallel to one another in the illustration according to FIG.
- the first channel 25 and the second channel 28 are each provided with a throttle element 29 or 30.
- the two channels 25 and 28 can with respect to the control chamber 5 both in the feed direction 26 and in relation to the control chamber 5 in the drain direction 27 of control volumes flowing out of the control chamber 5 or via the further inlet 21 through the valve chamber 20 in the feed direction 26 are flowed through under high pressure fuel volume.
- the mouth of the first channel 25 is such that it opens next to the valve body 14 of the multi-way valve 13 in the valve chamber 20, while the second channel 28 opens below the second valve seat 17 with valve seat diameter in the valve chamber 20 of the multi-way valve 13.
- the control chamber 5 is constantly connected to the inlet part of the high-pressure collecting chamber by the permanently acting first inlet throttle 4.
- valve body 14 of multiway valve 13 is placed in first valve seat 15, high pressure is present in control chamber 5.
- the valve body 20 of the multi-way valve 13 is sealed off from the outlet 23 by the valve body 14 placed in the valve seat diameter 16.
- valve body of the multi-way valve 13 is opened and moved via the actuator 22 into a central position 19 (dashed line), the pressure in the control chamber 5 is controlled by the permanently activated first channel 25 and the throttle element 29 contained therein and the second channel controlled by the central position 19 28 relieved in the drain direction 27.
- the pressure in the control chamber 5 can be reduced very quickly by suitable design of the throttle cross sections of the throttle element 29 in the first channel 25 and of the further throttle element 30 in the second channel 28.
- the nozzle needle / tappet arrangement 8 can be opened quickly. If, on the other hand, the valve body 14 of the multi-way valve 13 is moved from its central position 19 into its second seat 17 in the sealing position, the second channel 28 is closed.
- a pressure reduction in the control chamber 5 in this switching position of the valve body 14 of the multi-way valve 13 can only take place via the permanently acting first control channel 25 into the valve chamber 20 of the multi-way valve 13.
- the pressure in the control chamber 5 is reduced more slowly, compared to a pressure reduction in the control chamber 5, which can take place with the valve body 14 of the multi-way valve 13 moved in the central position 19 via the two channels 25 and 28 connected in parallel.
- valve body 14 If the valve body 14 is moved into the first valve seat 15 by actuating the actuator 22, the pressure build-up in the control chamber 5 of the injector housing will additionally take place via the further inlet 21 opening into the valve chamber 20 from the inlet 3 of the high-pressure collecting chamber.
- fuel under high pressure flows via the inlets to the first duct 25 and the second duct 28 in the inflow direction 26 with respect to the control chamber 5 via both throttle elements 29 and 30, which act in this case as an inlet throttle, into the rear of the control chamber 5.
- throttle elements 29 and 30 which act in this case as an inlet throttle
- the control chamber 5 in the injector housing 2 is connected to the valve chamber 20 of a multi-way valve 13 via two parallel channels, namely a first channel 25 and a second channel 28.
- a preferably spherical valve body 14 which can be set by means of an actuator element 22 via a transmission element 31 into a first valve seat 15, a middle position 19 and a lower valve seat 17.
- the two channels 25 and 28 connecting the valve chamber 20 of the multi-way valve 13 and the control chamber 5 with respect to the control chamber 5 can be flowed through by the control volume or inflowing fuel volume both in the feed direction 26 and in the drain direction 27.
- the further inlet 11 from the high-pressure collecting space opens into the first channel 25 at a distance 41 from the boundary surface 7 of the control chamber 5 in the injector housing 2.
- the outlet 23 is sealed and there is a pressure build-up in the control chamber 5 via the permanently acting first inlet throttle 4 and the further inlet 11 opening into the first flow channel 25 from the high-pressure collecting chamber.
- the permanently acting inlet throttle 4 and the further inlet 11 from the high-pressure collecting chamber act permanently on the control chamber 5. Due to the comparison to the permanently acting inlet throttles 4 and 11 with a comparatively large throttle cross section, throttle elements 29 and 30 in the first duct 25 and in the second duct 28, a rapid pressure reduction in the control chamber 5 in the valve chamber 20 occurs when the valve body 14 of the multi-way valve 13 is placed in its central position 19 as shown in Figure 2.
- the pressure reduction in the control chamber 5, to which at least one permanently acting inlet throttle 4 is assigned can be carried out either via a first channel 25 at a first pressure reduction speed when the valve body 14 of the multi-way valve 13 is placed in its second valve seat 17.
- the first channel 25 is connected in parallel with the valve body 14 of the multi-way valve 13 switched to the middle position 19, so that the pressure reduction in the control chamber 5 via two parallel channels into the valve chamber 20 and from there can be relieved of pressure in the drain 23.
- the throttle elements 29 and 30 accommodated in the first channel 25 and in the second channel 28 are designed with a larger cross section, so that a large flow through the throttle elements 29 and 30 and consequently a rapid pressure reduction occurs.
- the achievable pressure reduction speeds in the control chamber 5 of the injector in accordance with the design variants in FIGS. 1 and 2 can influence the course of the injection into the combustion chamber of an internal combustion engine in such a way that the injection rate can be adapted to the progress of combustion in the combustion chamber.
- FIG. 3 shows an injector body whose control chamber opens through an inlet channel into one of the channels connecting a valve chamber of the multi-way valve and the control chamber.
- the control chamber 5, which acts on a nozzle needle / tappet arrangement 8, and the valve chamber 20 of a multi-way valve 13 are connected to one another by two channels 25 and 28, respectively.
- a valve body 14 is accommodated, which by means of a transmission element 31 according to the control by a piezo actuator 22 places the valve body 14 in a first seat 15, a middle position 19 and a second seat 17.
- the two channels 25 and 28 between the valve chamber 20 of the multi-way valve 13 and the control chamber 5 within the injector housing 2 can be flowed through by fuel / control volume in relation to the control chamber both in the feed direction 26 and in relation to the control chamber 5 in the discharge direction 27.
- the second channel 28 opens below the second valve seat 17, which can be closed or released by the preferably spherical valve body 14.
- the inlet channel 23 opens into a region of an annular space 50, which is formed approximately in the middle between the valve seat 15 and the further throttle element 30 in the second channel 28.
- the section of the second channel 28, which extends between the mouth of the inlet channel 52 and the further throttle element 30 in a length 52, is designed as a diffuser section 51.
- the length 52 of the diffuser section 51 is dimensioned such that the fuel flow is able to contact the wall of the second channel 28. Due to the design of the throttle cross sections of the throttle elements 29 and 30 accommodated in the first channel 25 and the second channel 28, the control chamber 5 is simultaneously relieved of pressure from the first valve seat 15 via the two throttle elements 29 and 30 when the valve body 14 is opened.
- the valve body 14 of the multi-way valve 13 is placed in its second seat 17 in the valve chamber 20, the second flow channel 28 is closed and only the throttle element 29 of the first channel 25 acting as an outlet throttle acts.
- the control chamber 5 is pressurized in parallel by the permanently acting first inlet throttle 4 and the inlet duct 53 opening into the closed, closed second duct 28, in which a further inlet throttle 11 is accommodated.
- the further throttle element 30, which is accommodated in the second channel 28 acts on the control chamber 5 in the feed direction 26 and acts as the feed throttle in the rearward direction.
- valve body 14 of the multi-way valve 13 is reset into its first seat 15 by actuating the actuator 22 via its transmission element 31, the outlet 23 is closed and the nozzle needle / tappet arrangement 8 in the injector housing 2 closes very quickly, since the control chamber 5 is acted upon by two inlet throttles 4 and 11, 53.
- a difrusor section 51 is formed between the further throttle element 30 and the region 50, in which the inlet space 53 opens into the second channel 28 and extends from the inlet space 54.
- the length 52 of the diffuser section 51 is dimensioned such that the fuel flow can contact the wall of the flow channel 2, so that a laminar flow can form within the second flow channel 28.
- the embodiment variant of the idea on which the invention is based can be a fuel injector with which injection course shaping is possible and whose nozzle needle / tappet arrangement 8 can be positioned very quickly in a closed position. If the second valve seat 17 is closed by the valve body 14 of the multi-way valve 13, depending on the design of the inlet throttle 11 formed in the inlet duct 53, a minimal volume change can be achieved in the control chamber 5, so that even the smallest fuel injections during such a sensitive actuation of the nozzle needle / tappet arrangement 8 the boot phase of the injection can be made.
- the control of a nozzle needle / tappet arrangement can thus be adapted precisely to the progress of combustion in the combustion chamber of the internal combustion engine.
- FIG. 4 shows a further embodiment variant with only one valve chamber control chamber flow channel which can be flowed through in both flow directions.
- valve chamber of the multi-way valve 13 and the control chamber 5 in the injector housing 2 are connected to one another via only one channel 28.
- the nozzle chamber 5 in the injector housing 2 is continuously supplied with fuel under high pressure via a permanent first inlet throttle 4 which is acted upon in the inlet by the high-pressure collecting chamber or a differently configured high-pressure source.
- the control chamber 5 is delimited by a control chamber wall 6 and a control chamber surface 7.
- the nozzle needle / plunger arrangement 8 which extends into the nozzle chamber 5 or extends according to the double arrow 10 is immersed with its end surface 9 on the control chamber side.
- the multi-way valve 13, the valve body 14 of which is preferably spherical, can be moved in the vertical direction in the injector housing 2 by means of an actuator not shown here, for example a piezo actuator. It can be set from a first valve seat 15 into a central position 19 and into a second valve seat 17.
- the seat diameter between the curved outside of the Ventilgro ⁇ ers 14 and the seat in the injector housing 2 are indicated in dashed lines and identified with the reference numerals 16 and 18, respectively.
- the valve chamber 20 surrounds the valve body 14, which is preferably configured spherically.
- the transmission element 31 which can be actuated by the actuator 22 is surrounded by an annular gap 24.
- annular extension 50 is formed, into which an inlet channel 53 opens, which contains a further inlet throttle 11.
- the annular space 50 formed in the flow channel 28 is at a distance 52 from the further throttle 30 accommodated in the flow channel 28.
- the length identified by reference numeral 52 acts as a diffuser length of a diffusor 51, which extends between the annular extension 50 of the flow channel 28 and the further throttle element 30 of the flow channel 28.
- the inlet channel 53 with an integrated additional inlet throttle element 11 is likewise fed via the inlet 3 on the high-pressure side, which likewise supplies the inlet throttle 4 which acts permanently on the control chamber 5 with fuel under high pressure and thus ensures a sufficient pressure level in the control chamber 5 of the fuel injector.
- the pressure in the control chamber 5 is reduced by an outflowing fuel volume which leaves in the valve chamber 20 and thus the annular gap 24 on the low-pressure side of the fuel injector.
- the conclusion is be limited in the flow channel 28. Due to the diffuser section 51 connected downstream, the flow is throttled by cavitation. If, on the other hand, the valve body 14 of the multi-way valve is switched through to its second valve seat 17, the control chamber is acted upon in parallel by high pressure fuel via the permanently acting inlet throttle 4 and the further throttle element 11 in the inlet duct 53. In this case, the further throttle element 30 let into the flow channel 28 acts as a discharge throttle through which flow flows backwards.
- a double-switching injector can be built, in which the nozzle needle is closed quickly.
- the injector can be constructed very simply and compactly. It is particularly advantageous that the permanent flow in the open state through the further inlet throttle 11 leads to an increase in the current through the multi-way valve 13. This also acts as a delay element, so that the valve body 14 of the multi-way valve does not have to be switched quickly, which allows the use of cheaper actuators 22.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02747225A EP1404963A1 (de) | 2001-06-29 | 2002-06-19 | Kraftstoffinjektor mit variabler steuerraumdruckbeaufschlagung |
JP2003510598A JP2004532955A (ja) | 2001-06-29 | 2002-06-19 | 可変な制御室圧力負荷を伴う燃料インジェクタ |
US10/482,027 US20050194463A1 (en) | 2001-06-29 | 2002-06-19 | Fuel injector with variable control chamber pressurization |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10131642.9 | 2001-06-29 | ||
DE10131642A DE10131642A1 (de) | 2001-06-29 | 2001-06-29 | Kraftstoffinjektor mit variabler Steuerraumdruckbeaufschlagung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003004858A1 true WO2003004858A1 (de) | 2003-01-16 |
Family
ID=7690078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/002235 WO2003004858A1 (de) | 2001-06-29 | 2002-06-19 | Kraftstoffinjektor mit variabler steuerraumdruckbeaufschlagung |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050194463A1 (de) |
EP (1) | EP1404963A1 (de) |
JP (1) | JP2004532955A (de) |
DE (1) | DE10131642A1 (de) |
WO (1) | WO2003004858A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006053810A1 (de) * | 2004-11-17 | 2006-05-26 | Robert Bosch Gmbh | Kraftstoffeinspritzvorrichtung |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10326260A1 (de) * | 2003-06-11 | 2005-01-05 | Robert Bosch Gmbh | Kraftstoffeinspritzventil und Verfahren zu dessen Steuerung |
EP2295784B1 (de) * | 2009-08-26 | 2012-02-22 | Delphi Technologies Holding S.à.r.l. | Kraftstoffeinspritzdüse |
US8448878B2 (en) * | 2010-11-08 | 2013-05-28 | Caterpillar Inc. | Fuel injector with needle control system that includes F, A, Z and E orifices |
DE102014211287A1 (de) * | 2014-06-12 | 2015-12-17 | Engineering Center Steyr Gmbh & Co. Kg | Fluid-Einspritzvorrichtung für eine Verbrennungskraftmaschine |
CN106762281B (zh) * | 2017-01-18 | 2023-03-21 | 哈尔滨工程大学 | 一种带液力反馈的电控喷油器 |
CN113790117A (zh) * | 2021-09-14 | 2021-12-14 | 哈尔滨工程大学 | 一种基于电磁比例阀喷油规律柔性可控的高压共轨喷油器 |
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DE10064790A1 (de) * | 1999-12-24 | 2001-06-28 | Denso Corp | Kraftstoffeinspritzvorrichtung der Bauart mit gemeinsamer Druckleitung |
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GB9606803D0 (en) * | 1996-03-30 | 1996-06-05 | Lucas Ind Plc | Injection nozzle |
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2001
- 2001-06-29 DE DE10131642A patent/DE10131642A1/de not_active Ceased
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2002
- 2002-06-19 JP JP2003510598A patent/JP2004532955A/ja active Pending
- 2002-06-19 WO PCT/DE2002/002235 patent/WO2003004858A1/de not_active Application Discontinuation
- 2002-06-19 US US10/482,027 patent/US20050194463A1/en not_active Abandoned
- 2002-06-19 EP EP02747225A patent/EP1404963A1/de not_active Withdrawn
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DE19733897A1 (de) * | 1996-08-05 | 1998-02-12 | Nippon Soken | System zur Steuerung eines Kraftstoffeinspritzzeitpunkts für einen Verbrennungsmotor |
DE19634105A1 (de) * | 1996-08-23 | 1998-01-15 | Daimler Benz Ag | Einspritzventil für Verbrennungskraftmaschinen |
DE19715234A1 (de) | 1997-04-12 | 1998-06-25 | Daimler Benz Ag | Magnetventilgesteuertes direkteinspritzendes Kraftstoffeinspritzventil für Speichereinspritzsysteme von mehrzylindrigen Brennkraftmaschinen |
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DE19744518A1 (de) | 1997-10-09 | 1999-04-15 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
EP0976924A2 (de) * | 1998-07-31 | 2000-02-02 | Siemens Aktiengesellschaft | Servoventil für ein Einspritzventil und Einspritzventil |
EP0994248A2 (de) | 1998-10-13 | 2000-04-19 | Caterpillar Inc. | Brennstoffeinspritzventil mit piezoelektrischer Einspritzverlaufregelung |
WO2000055490A1 (en) * | 1999-03-18 | 2000-09-21 | Delphi Technologies Inc. | Fuel injector |
DE10064790A1 (de) * | 1999-12-24 | 2001-06-28 | Denso Corp | Kraftstoffeinspritzvorrichtung der Bauart mit gemeinsamer Druckleitung |
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WO2006053810A1 (de) * | 2004-11-17 | 2006-05-26 | Robert Bosch Gmbh | Kraftstoffeinspritzvorrichtung |
Also Published As
Publication number | Publication date |
---|---|
JP2004532955A (ja) | 2004-10-28 |
DE10131642A1 (de) | 2003-01-16 |
US20050194463A1 (en) | 2005-09-08 |
EP1404963A1 (de) | 2004-04-07 |
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