WO2020156778A1 - Soupape d'admission pour pompe haute pression destinée à acheminer du carburant vers un moteur à combustion interne et pompe comportant une telle soupape - Google Patents

Soupape d'admission pour pompe haute pression destinée à acheminer du carburant vers un moteur à combustion interne et pompe comportant une telle soupape Download PDF

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Publication number
WO2020156778A1
WO2020156778A1 PCT/EP2020/050503 EP2020050503W WO2020156778A1 WO 2020156778 A1 WO2020156778 A1 WO 2020156778A1 EP 2020050503 W EP2020050503 W EP 2020050503W WO 2020156778 A1 WO2020156778 A1 WO 2020156778A1
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WO
WIPO (PCT)
Prior art keywords
valve
valve body
closure
pump
fuel
Prior art date
Application number
PCT/EP2020/050503
Other languages
German (de)
English (en)
Inventor
Alessandro Di Monte
Benedetto Loiacono
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2020156778A1 publication Critical patent/WO2020156778A1/fr

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Classifications

    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type
    • 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
    • F02M63/0035—Poppet valves, i.e. having a mushroom-shaped valve member that moves perpendicularly to the plane of the valve seat
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • 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
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • 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
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations

Definitions

  • the technical field of the present invention relates to pumps for supplying fuel, preferably diesel, to an internal combustion engine.
  • the technical field of the present invention relates to a high pressure pump of the type with at least one pump piston which is cyclically supplied with fuel by means of an associated intake valve which comprises a movable closure which is designed to connect cyclically tightly to an associated valve body .
  • the present invention relates to a special geometry of the sealing surface of the closure.
  • Pump units for supplying fuel from a tank are known an internal combustion engine. Such pump units include a low pressure pump and a high pressure pump in series.
  • the high pressure pump is usually a pump with at least one pump piston.
  • a pump with a pump piston comprises a pump body which is designed to receive a head part, in the interior of which at least one cylinder is used
  • One end of the pump piston that is, the end more inside the pump body and known as the "foot" of the piston, is connected to a camshaft (or other actuator) that is rotated about its own axis (perpendicular to the cylinder axis) the back and forth movement of the pump piston
  • the piston in the cylinder.
  • the piston is held against the shaft by a specially provided preloaded spring.
  • the piston reciprocates along the cylinder, it performs a suction stroke that penetrates the pump body and brings fuel into the cylinder, and a compression stroke that does the same as the previous one
  • Suction stroke compressed in the cylinder introduced fuel.
  • the supply to the cylinder is through a first conduit on the outer surface of the head portion, while the compressed fuel is discharged along a second conduit.
  • the top part of the cylinder where the compression takes place is called the compression chamber.
  • Valves are provided along the fuel supply and exhaust lines with respect to the cylinder.
  • the fuel Before entering the cylinder, the fuel is fed into a suction chamber on the outside of the head part and in connection with the compression chamber through the suction valve.
  • the pressure valve is connected to the engine, preferably by a common one Collector that is equipped with several injection nozzles.
  • the suction chamber is delimited by a stopper which is tightly sealed against the outer surface of the head part at the level of the suction valve.
  • the suction valve comprises a closure member which is movable with respect to a valve body which can be made directly in one piece with the head part (i.e. can be directly the upper part of the cylinder) or as a separate cylindrical body and tightly closed against the External surface of the headboard can be kept.
  • the valve body defines a guide axis for a shaft part of the closure member which, on opposite sides of the valve body, has a first end which projects into the suction chamber and a second end which is shaped as a closure and which projects into the compression chamber.
  • the upper surface of the closure (or sealing surface) is in abutment against a corresponding surface of the valve body in order to prevent fuel from flowing back into the intake chamber.
  • a dedicated spring positioned between the head of the stem (i.e. the end in the suction chamber) and the outer surface of the valve body has the purpose of guaranteeing the minimum opening pressure of the valve.
  • the aim of the present invention is to provide an innovative suction valve for a high-pressure pump (preferably of the type with at least one pump piston) for the supply of
  • a suction valve configured around a channel that connects the suction chamber (outside the cylinder that houses the pump piston) and the compression chamber (inside the cylinder that houses the pump piston) to open and close.
  • a suction valve provided for this purpose comprises the following: a) a closure element (essentially mushroom-shaped) which comprises a cylindrical shaft which has a first (cylindrical) end and a second end which is connected to a closure (wider part with respect to the shaft) is provided; b) a cylindrically shaped valve body between the suction chamber and the compression chamber, a through hole being created in this valve body for the sliding reception of the shaft of the closure member.
  • this component has no changes compared to those currently in use experienced. Therefore, according to the present invention, the dimensions of the hole of the valve body and that of the drive element are such that, when the valve is assembled, the first end of the closure element (that cylindrical one without a closure) projects into the suction chamber on one side of the valve body. As is known, this is cylindrical
  • the stem of the closure member includes a widened end, known as a closure, which projects over the valve body and, when used, is intended to be in the compression chamber.
  • This closure is circular in plan (as viewed along the axis of the shaft, of course) and includes a lower surface that is substantially flat and perpendicular to the axis of the shaft. Opposite the lower flat surface, the
  • Closure a sealing surface that is configured to be selectively in a tight stop against a second outer surface of the valve body (that is, the surface of the valve body facing the compression chamber).
  • the sealing surface is understood to be at least the part of the surface of the closure which is designed to come into contact with the valve body.
  • the hole of the valve body which receives the stem comprises a widened part in front of the above-mentioned second outer surface, so that a distribution chamber is created in the interior of the valve body, which is fed by fuel emerging from the intake chamber.
  • This distribution chamber is made in particular by fed at least one (for example radial) channel, which is created in the valve body.
  • the stem along the hole of the valve body is between a first position, in which the closure is in abutment against the above-mentioned second outer surface of the valve body (and therefore in which the fuel cannot get from the distribution chamber into the compression chamber), and a second Movable position in which the closure is not in abutment against the above-mentioned second outer surface of the valve body (and therefore in which there is a channel for the free flow of the fuel from the distribution chamber to the compression chamber).
  • the dynamics that regulate the opening and closing of the intake valve are not described further because they are known and do not form the subject of the present invention.
  • the subject of the present invention is about how the tight connection between the sealing surface and the second
  • the outer surface of the valve body is to be improved, especially if it is a frustoconical surface.
  • This frusto-conical shape is known and has a first inner edge at the junction of the distributor chamber in the compression chamber and a second outer edge (i.e. at a greater distance from the valve axis), this second edge being located at a greater depth in the compression chamber.
  • the sealing surface is no longer conical or spherical, but is a toroidal surface (i.e. it corresponds to a part of a toroid or donut) that has a circular surface line.
  • a toroid is a geometric figure obtained as the surface of rotation of the surface line around an axis of rotation (in this case, the axis of the shaft), which is the same plane of the
  • this solution guarantees optimum tightness on the one hand and on the other hand allows the life of the valve to be extended in a safe manner. Thanks to the toroidal geometry, the contact surface is centered on the conical surface of the valve body, and at a distance from the edges, so that there is no local contact at these edges even when worn. It is precisely the contact with these edges, in particular with the inner edge, which in the prior art has a very high local pressure with the resulting greater local deformation and
  • the present invention also relates to a high-pressure pump for supplying fuel to an internal combustion engine, in which this pump comprises a valve with a toroidal sealing surface.
  • This high pressure pump includes one Head part in which a cylinder for sliding a pump piston is created.
  • the valve body of the intake valve can be an independent piece that is tightly connected to the cylinder, or it can be an integrated part (in one piece) in the head part.
  • FIG. 1 is a schematic cross-sectional view of an example of a high pressure pump with pistons which can be provided with a suction valve according to the invention
  • FIG. 2 is a schematic view of a suction valve according to a first example of the prior art
  • FIGS. 5a-5c are schematic views of a suction valve according to a second example of the prior art.
  • FIG. 8a-8c represent schematic views of an intake valve according to the invention.
  • Figures 10a and 10b represent the course of the contact pressure of the embodiment of Figure S esse with wear.
  • FIG. 1 shows a schematic cross-sectional view of a part of a high-pressure pump with pistons, which can be provided with a suction valve according to the invention.
  • this high-pressure pump can be part of a pump unit (not shown) which is designed to supply fuel from a tank to an internal combustion engine.
  • the high-pressure pump 1 from FIG. 1 is a pump with a pump piston (only one piston is shown in FIG. 1) and is designed to supply fuel from a tank to an internal combustion engine (both not shown). Between the tank and the high-pressure pump, the pump unit can also comprise a low-pressure pump, for example a gear pump (not shown), which is designed to supply the fuel from a tank to the high-pressure pump. In a known manner, the high pressure pump 1 and the low pressure pump can be driven by a common shaft (not shown).
  • the high-pressure pump 1 comprises a pump body (not shown) which is connected to a head part 2.
  • a Cylinder 3 has been created, which extends along an axis Al and receives a pump piston (not shown).
  • the piston is slidably connected to the cylinder 3.
  • a suction line 4 has also been created, which is designed to supply the fuel to a suction chamber 5, which is arranged outside the head part 2.
  • the high-pressure pump 1 comprises a pump body (not shown)
  • the suction chamber 5 is connected to the cylinder 3 by a suction valve 6.
  • the upper part of the cylinder 3 between the head of the piston and the suction valve 6 is called a compression chamber and is in turn connected to a pressure line 7 which is created inside the head part 2 .
  • This pressure line 7 is provided with a pressure valve 8 to the
  • the suction valve 6 comprises a closure member 9, which is accommodated in a through hole of the head part 2, which is created along the axis A1 of the cylinder.
  • This part of the head part 2 for receiving the closure member 9 is known as the valve body 10 and cannot necessarily be made in one piece with the head part 2.
  • the movement of the pump piston is triggered by an actuator (usually a camshaft, which is not shown in the accompanying figures). Due to the effect of the rotation of the cam, the piston slides along the cylinder 3 with a straight forward and backward movement, which has a stroke for the suction of the
  • the suction chamber 5 is defined by a stopper 11 which is connected to the head part and on the opposite side to the pump piston with regard to the valve 6 is arranged.
  • the plug 11 comprises a cover and a ring which fixes the cover to the head part 2. Everything described here is known to the technician skilled in the art, and therefore further structural details are omitted.
  • the closure member 9 shown in FIG. 1 is essentially mushroom-shaped and comprises a cylindrical shaft 12 which has a first (cylindrical) end 13 and a second end 14 which is closed with a closure 15 (with respect to the Shaft widened part) is provided.
  • the valve body 10 is in a cylindrical shape between the
  • valve body 10 Suction chamber and the compression chamber.
  • a through hole for the sliding reception of the shaft 12 of the closure member 9 is created.
  • this component has not undergone any changes compared to those currently in use.
  • the valve body 10 comprises a hole 16 for receiving the stem 12.
  • the dimensions of the hole 16 of the valve body 10 and those of the drive element 9 are such that, when the valve 6 is assembled, the first end 13 (that cylindrical one without a closure) of the closure element 9 one side of the valve body 10 protrudes into the suction chamber 5 (of course when the valve of the associated pump is assembled).
  • this cylindrical end 13 is connected to a plate 17 (for example by an interference fit) as a support for a spring 18 between the plate 17 and a first outer surface of the valve body 10.
  • the purpose of this spring 18 is to generate an elastic force in order to guarantee the minimum opening pressure.
  • includes on the to the plate 17 opposite side of the shaft 12 of the closure member 9 has a widened end, known as the closure 15, which projects over the valve body 10 and is intended, when used, to be located in the compression chamber 19 of the pump.
  • This closure 15 is circular in plan (of course viewed along the axis A1 of the shaft) and comprises a lower surface 20 which is substantially flat and perpendicular to the axis of the shaft.
  • the closure 15 Opposite the lower planar surface 20, the closure 15 includes a sealing surface 21 that is configured to be selectively in a tight seal against a second outer surface 22 of the valve body 10 (i.e., the surface of the valve body 10 that faces the compression chamber 19) .
  • the sealing surface 21 is understood to be at least the part of the surface of the closure 15 which is designed to come into contact with the valve body 10 when the intake valve 6 blocks the supply of fuel to the compression chamber 19.
  • the hole 16 of the valve body 10 that receives the stem 12 includes a widened portion in front of the aforementioned second outer surface
  • the valve body 10 is along the hole 16 of the valve body 10 between a first position, in which the closure 15 is against the above-mentioned second outer surface 22 of the valve body 10 (and therefore the fuel is not from the plenum
  • the subject of the present invention is how to improve the tight connection between the sealing surface 21 of the closure 15 and the second outer surface 22 of the valve body 10, in particular if this surface is a frustoconical surface.
  • This frusto-conical shape is known and has a first inner edge 25 at the junction of the distribution chamber 23 in the compression chamber 19 and a second outer edge 26 (i.e. at a greater distance from the valve axis), this second edge 26 being at a greater depth in the
  • Compression chamber 19 is located.
  • the valve body 10 is in one piece with the head part 2, and therefore there is no interruption in the rest of the cylinder 3 except the edge 26
  • a sealing surface 21 with a frustoconical profile (FIGS. 2-4b) or with a spherical profile (FIGS. 5a-7b) is currently proposed in connection with the above-mentioned frustoconical surface 22.
  • FIGS. 2-4b a frustoconical profile
  • FIGS. 5a-7b spherical profile
  • this figure shows a schematic view of a Intake valve according to a first example of the prior art.
  • the frustoconical surface 22 is delimited by the first inner edge 25 and by the second outer edge 26.
  • the connection between the sealing surface 21 'and that frustoconical 22 is reduced essentially only to the inner edge 25, since the sealing surface 21' also has a frustoconical shape. According to the state of the art, this connection is called “conical sealing”.
  • Figure 3a shows an enlargement of the configuration of Figure 2 in the state of the connection without wear
  • Figure 3b shows the course of the contact pressure with this connection. Thanks to the fact that there is essentially only one theoretical contact point, the pressure peaks at the edge 25 and then rapidly decreases along the sealing surface 21 'until it dissolves (in an exponential manner) at half its length.
  • Figure 4a shows an enlargement of the embodiment of Figure 2 in the state of a worn connection. Due to the high pressure, which is localized on the edge 25, there is a local deformation on the conical sealing surface 21 'exactly on the inner edge 25. This deformation naturally reduces the life of the valve.
  • FIG. 5a shows a schematic view of an intake valve according to a second example of the prior art. While maintaining that the frusto-conical surface 22 is bounded by the first inner edge 25 and the second outer edge 26, in the example of FIG. 5a, the connection between the sealing surface 21 "and that frustoconical 22 is not punctiform as in the previous example thanks to the fact that the sealing surface 21" has a spherical shape with the center on the axis of the shaft 12.
  • FIGS. 5b and 5c show progressive enlargements of the connection area between the frustoconical surface 22 and the spherical sealing surface 21 ”in this embodiment. In particular, FIG.
  • FIG. 5B makes it possible to see that the radius of the ball, which defines the spherical geometry of the sealing surface 21 ”, is greater than the radius of the closure 15 and the radius of the cylinder 3.
  • FIG. 5c makes it possible to see that the connection area is essentially centered on the frustoconical surface 22 and is very extensive until it almost reaches the edges 25 and 26.
  • Figure 6a shows an enlargement of the embodiment of Figure 5c in the state of the connection without wear
  • Figure 6b shows the associated Figure 6b
  • Figure 7a shows an enlargement of the embodiment of Figure 5c in the state of a worn connection.
  • the connection area extends so far that the edges 25 and 26 are also affected, which were namely a short distance from the original contact area.
  • Figure 7b these develop Edges two tips which, as in the previous case, lead to a deformation of the closure and a consequent reduction in the life of this element.
  • Figure 8a shows a schematic view of an intake valve according to an embodiment of the present invention.
  • the frustoconical surface 22 is delimited by the first inner edge 25 and by the second outer edge 26, in the example of FIG.
  • the connection between the sealing surface 21 and that of the frustoconical 22 is not punctiform as in the first example of the stand of technology and does not include the edges (even when worn) as in the second example of the prior art described.
  • the sealing surface 21 according to the invention has a toroidal shape with a circular surface line. Thanks to the fact that (as can be seen in Figure 8a) a vertical cross-section of the closure shows the presence of a double ball (that is, the surface line in two different positions), this connection can be defined as a "double ball" connection.
  • FIGS. 8b and 8c show progressive enlargements of the connection area between the frustoconical surface 22 and the toroidal sealing surface 21. In particular, FIG.
  • FIG. 8B makes it possible to see that the radius of the circumferential line circumference, which defines the toroidal geometry of the sealing surface 21, is smaller than the radius of the closure 15 and the radius of the cylinder 3 is.
  • FIG. 8c makes it possible to ascertain that the connection area is essentially centered on the frustoconical surface 22 and is at a distance from the edges 25 and 26 that is larger in FIG Is compared to Figure 5c according to the prior art.
  • the contact area between the sealing surface 21 and the second outer surface 22 of the valve body 10 is substantially in the middle of the second outer surface 22 of the valve body 10 at an equal distance from the outer edges 25, 26 of the frustoconical surface 22;
  • the center of the circular surface line, which defines the toroidal surface 21, is substantially on the lower flat surface 20 of the
  • the center of the circular surface line defining the toroidal surface 21 is at a distance from the connection between the lower flat surface 20 and the side surface 27 which is smaller than the distance from the axis Al of the shaft 12;
  • the radius of the circular surface line has a length substantially equal to half the distance between the side surface 27 and the axis Al of
  • the circular surface line defining the toroidal surface 21 does not intersect the axis Al of the shaft 12; - The radius of the circular surface line is less than half the radius of the cylinder 3rd
  • Figure 9a shows an enlargement of the configuration of Figure 8c in the state of the connection without wear
  • Figure 9b shows the course of the contact pressure in this connection.
  • Figure 10a shows an enlargement of the configuration of Figure 8c in the state of a worn connection. Thanks to the toroidal geometry, the connection zone does not extend so far that it also affects the edges 25 and 26 even when worn. If there is no contact at the edges, as can be seen in FIG. 10b, there are no pressure peaks. If there are no pressure peaks, the deformation of the closure is limited and not selective, which increases the lifespan of this element.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une soupape d'admission (6) pour une pompe haute pression (1) destinée à acheminer du carburant vers un moteur à combustion interne, la soupape d'admission comprenant un organe d'obturation (9) mobile, lequel comprend une tige cylindrique (12) présentant une première extrémité (13) et une seconde extrémité (14) pourvue d'un obturateur (15), la soupape comprenant en outre un corps de soupape (10) dans lequel est réalisé un trou traversant (16) destiné à recevoir la tige de l'organe d'obturation, et sur lequel la première extrémité (13) de l'organe d'obturation (9) fait saillie d'un côté du corps de soupape (10) et est reliée à un ressort comportant une première surface extérieure (22) du corps de soupape (10), laquelle première surface est orientée vers la chambre d'admission (5). L'obturateur (15) fait saillie du côté opposé du corps de soupape (10) et comprend une surface d'étanchéité (21) conçue pour être sélectivement en butée étanche contre une seconde surface extérieure (22) du corps de soupape, laquelle seconde surface est orientée vers la chambre de compression (19), la seconde surface extérieure (22) du corps de soupape étant une surface tronconique, et la surface d'étanchéité (21) étant une surface toroïdale à génératrice circulaire.
PCT/EP2020/050503 2019-01-31 2020-01-10 Soupape d'admission pour pompe haute pression destinée à acheminer du carburant vers un moteur à combustion interne et pompe comportant une telle soupape WO2020156778A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000001413A IT201900001413A1 (it) 2019-01-31 2019-01-31 Valvola di aspirazione per una pompa di alta pressione di alimentazione di carburante ad un motore a combustione interna e pompa comprendente tale valvola
IT102019000001413 2019-01-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100002639A1 (it) * 2021-02-05 2022-08-05 Bosch Gmbh Robert Valvola di aspirazione per una pompa di alta pressione di alimentazione di carburante ad un motore a combustione interna e pompa comprendente tale valvola

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6168132B1 (en) * 1997-12-23 2001-01-02 Siemens Aktiengesellschaft Injection valve with control valve
DE102006057425A1 (de) * 2006-05-23 2007-11-29 Robert Bosch Gmbh Vorrichtung zur Regeneration, zur Temperaturbeaufschlagung und/oder zum Thermomanagement, zugehöriges Einspritzventil und Verfahren
DE102007034038A1 (de) * 2007-07-20 2009-01-22 Robert Bosch Gmbh Hochdruckpumpe für ein Kraftstoffsystem einer Brennkraftmaschine
ITMI20120243A1 (it) * 2012-02-17 2013-08-18 Bosch Gmbh Robert Valvola di aspirazione e gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
DE102017207688A1 (de) * 2017-05-08 2018-11-08 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6168132B1 (en) * 1997-12-23 2001-01-02 Siemens Aktiengesellschaft Injection valve with control valve
DE102006057425A1 (de) * 2006-05-23 2007-11-29 Robert Bosch Gmbh Vorrichtung zur Regeneration, zur Temperaturbeaufschlagung und/oder zum Thermomanagement, zugehöriges Einspritzventil und Verfahren
DE102007034038A1 (de) * 2007-07-20 2009-01-22 Robert Bosch Gmbh Hochdruckpumpe für ein Kraftstoffsystem einer Brennkraftmaschine
ITMI20120243A1 (it) * 2012-02-17 2013-08-18 Bosch Gmbh Robert Valvola di aspirazione e gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
DE102017207688A1 (de) * 2017-05-08 2018-11-08 Robert Bosch Gmbh Steuerventil für einen Kraftstoffinjektor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100002639A1 (it) * 2021-02-05 2022-08-05 Bosch Gmbh Robert Valvola di aspirazione per una pompa di alta pressione di alimentazione di carburante ad un motore a combustione interna e pompa comprendente tale valvola
WO2022167290A1 (fr) * 2021-02-05 2022-08-11 Robert Bosch Gmbh Soupape d'aspiration pour une pompe à haute pression pour l'alimentation en carburant d'un moteur à combustion interne et pompe comprenant une telle soupape

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