EP3283757A1 - Soupape de régulation de pression à capteur de pression intégré - Google Patents

Soupape de régulation de pression à capteur de pression intégré

Info

Publication number
EP3283757A1
EP3283757A1 EP16707146.3A EP16707146A EP3283757A1 EP 3283757 A1 EP3283757 A1 EP 3283757A1 EP 16707146 A EP16707146 A EP 16707146A EP 3283757 A1 EP3283757 A1 EP 3283757A1
Authority
EP
European Patent Office
Prior art keywords
pressure
valve
control valve
valve body
pressure control
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.)
Withdrawn
Application number
EP16707146.3A
Other languages
German (de)
English (en)
Inventor
Armin Schuelke
Olaf Ohlhafer
Felix Jaegle
Jan Schotte
Tim Maier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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 EP3283757A1 publication Critical patent/EP3283757A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F02M63/005—Pressure relief valves
    • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
    • 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the common rail
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors

Definitions

  • the present invention relates to a pressure control valve with an integrated pressure sensor for a high pressure accumulator, and a high pressure accumulator with a pressure control valve.
  • the pressure control valve according to the invention has the advantage that it comprises an integrated pressure sensor, so that the pressure sensor is arranged to save space. At the same time, the pressure sensor is arranged so that it reliably measures the pressure in the high-pressure accumulator and is not or only slightly influenced by the high temperatures of the throttling valve seat.
  • the pressure regulating valve for controlling the pressure in a high pressure chamber of a high pressure accumulator, in particular a fuel
  • High-pressure accumulator a valve body, a formed on the valve body valve seat and a closing member.
  • the closure member cooperates with the valve seat to open and close a hydraulic connection from the high pressure space to a low pressure space.
  • the valve body protrudes at least partially into the high-pressure chamber.
  • a recess is formed, wherein in the recess, a pressure sensor for detecting the pressure in the high-pressure chamber is arranged.
  • the pressure sensor is integrated in the valve body of the pressure regulating valve, specifically in the area of the valve body which projects into the high pressure space.
  • Valve seat and pressure sensor are formed or arranged in the same component, the valve body. However, the pressure sensor is arranged spatially separated from the valve seat, so that the heating of a flowing through the valve seat fluid no or little effect on the
  • Pressure sensor has.
  • the pressure sensor comprises at least one sensor membrane.
  • the sensor membrane preferably made of a metallic material, is comparatively thin, so that it under the pressurization of the High pressure chamber deformed. From this deformation, the pressure sensor determines a value for the pressure prevailing in the high-pressure chamber.
  • the pressure sensor comprises evaluation electronics and a measuring bridge applied to the sensor membrane.
  • the measuring bridge is arranged between the sensor membrane and the evaluation electronics.
  • the measuring bridge consisting for example of strain gauges, generates from the deformation of the sensor membrane an electrical signal or a change of an electrical signal.
  • the electrical signal or the change of the signal is passed on to the transmitter, which determines therefrom a value for the pressure in the high-pressure chamber.
  • the transmitter is already integrated in the pressure sensor; due to the spatial proximity between the pressure sensor and evaluation electronics, the electrical signal can be evaluated trouble-free. A gain of the electrical signal is not required.
  • At least one electrically conductive contact cable is guided through the valve body, wherein the at least one contact cable is connected to the evaluation electronics.
  • an electrical signal coming from the transmitter which, for example, already reflects the pressure value of the high-pressure chamber, can be further processed, for example transmitted to a control unit.
  • three contact cables are used: signal, power supply and ECU ground.
  • it can also be saved, for example, a contact cable when a port is connected to ground of the pressure control valve.
  • the sensor membrane is connected to the valve body so that it closes the recess media-tight.
  • the pressure measurement of the high-pressure chamber is leak-free and error-free.
  • the pressure in the recess can thus be maintained at a constant level, for example below atmospheric pressure.
  • the pressure measurement is thus very reliable and efficient.
  • the sensor membrane is screwed or welded to the valve body.
  • the media-tight connection of sensor membrane to the valve body is simple, inexpensive and designed with high strength.
  • Valve body formed.
  • the pin protrudes into the high-pressure chamber of the high-pressure accumulator.
  • an annular gap is formed, wherein the annular gap is a partial volume of the high-pressure chamber.
  • the spigot of the valve body is a simple and inexpensive solution for receiving the pressure sensor.
  • the annular gap serves to flow around the pin with the fluid of the high-pressure chamber.
  • the pin and with it also the pressure sensor is cooled by the fluid.
  • a bore connection is formed in the valve body between the valve seat and the annular gap.
  • the annular gap is strongly flowed around when the pressure regulating valve is open.
  • the cooling of the pin with the comparatively cool fluid of the high-pressure chamber is thus improved.
  • the cooling of the pin is particularly efficient when neither annular gap nor bore connection have a throttling effect on the outflowing fluid.
  • the throttling then takes place, for example, in the valve seat itself.
  • the bore connection comprises a blind hole opening into the valve seat and at least one, but preferably two to four, radial bores.
  • the at least one radial bore connects the
  • the pressure regulating valve has a valve housing, wherein the valve housing is clamped to the valve body.
  • a guide bore is formed, in which the closing member is guided longitudinally movable.
  • the valve body has a sealing edge which cooperates with a housing of the high-pressure accumulator delimiting the high-pressure chamber.
  • a guide bore is formed in the valve body, in which the closing member is guided longitudinally movable. Characterized both the valve seat and the closing member are formed or arranged in the valve body, so that the number of components is reduced. Furthermore, this eliminates at least one sealing point.
  • the closing member is electromagnetically controllable, for example via a magnetic actuator. This is a simple and reliable control of the pressure control valve. If required, comparatively high actuating forces can also be realized with this control.
  • a spring acts at least indirectly on the closing member in the opening direction. This can be done via a direct contact between spring and closing member but also indirectly, for example, with the interposition of a spring plate or a magnet armature. The fact that the spring acts in the opening direction, that is, the closing member lifts from the valve seat, a negative pressure formation in the high-pressure chamber outside the operation of the high-pressure accumulator is avoided.
  • the pressure regulating valve is used in a high-pressure accumulator, in particular in a high-pressure fuel accumulator.
  • the pressure control valve is connected to the high pressure accumulator so that the pressure sensor or the valve body protrudes with the pressure sensor in the high pressure chamber.
  • high-pressure accumulators especially in fuel high-pressure accumulators, very high pressures, in some cases more than 3000 bar, act.
  • the described embodiments of the pressure control valve according to the invention are particularly suitable for such high demands.
  • FIG. 1 shows a first embodiment with a high pressure accumulator and a pressure control valve according to the invention with an integrated pressure sensor.
  • Fig.1 is an area of a high-pressure accumulator 1 with a
  • the high-pressure accumulator 1 has the usual connections: a high-pressure connection coming from a high-pressure pump and at least one, but usually several, leading to injection injectors
  • the high-pressure accumulator 1 has a substantially cylindrical housing 2, which surrounds a likewise substantially cylindrical high-pressure chamber 3.
  • the housing 2 has a return bore 4, to which a return line 99 is connected. On the housing 2 is at a
  • Pressure control valve 10 can be screwed.
  • In the opening 6 is a
  • Thread 9 is formed, in which a corresponding thread 19 a of the Pressure control valve 10 can be screwed.
  • the corresponding thread 19a is formed on a screw-threaded portion 19 of the pressure regulating valve 10.
  • the pressure regulating valve 10 has a valve housing 12, a valve body 21, a valve seat 20 and a closing member 30.
  • the closing member 30 cooperates with the valve seat 20 and is longitudinally movably guided in a guide bore 31 formed in the valve housing 12.
  • the valve seat 20 is formed on the valve body 21 and the valve body 21 and the valve housing 12 are clamped together by the Verschiebschraub Scientific 19 with the interposition of a shim 39.
  • the shim 39 serves to compensate for tolerances of
  • the valve body 21 has a sealing edge 49, which cooperates with the housing 2 of the high-pressure accumulator 1, so that the housing 2 is connected to the valve body 21 media-tight.
  • An optional additional sealing disc can thus be omitted in this area.
  • valve body 21 and valve housing 12 may also be made in one piece; the shim 39 would then be omitted or would be positioned elsewhere in the pressure control valve 10. If, in the following, therefore, spoken of the valve body 21, this includes both the one-piece and the two-part design of the valve body 21 and valve housing 12, unless otherwise specified.
  • the valve seat 20 is in operative connection with the closing member 30, which rests on the valve seat 20 in the closed state of the pressure regulating valve 10 and a hydraulic connection from the high-pressure chamber 3 of the
  • the closing member 30 is in the embodiment of Fig.l needle-shaped with a ball tip, but may also have any other conventional shape, such as a face for a flat seat or a cone.
  • At least one discharge opening 15 is formed, via which a fluid, which in the open state of the pressure regulating valve 10 through the valve seat 20 flows, can flow through the return bore 4 in the housing 2 in the return line 99.
  • a recess 40 is formed in the valve body 21, for example in the form of a receiving bore or blind hole, in which a pressure sensor 50 is arranged.
  • the area of the valve body 21, in which the recess 40 is formed, is configured as a pin 22 in the embodiment of FIG.
  • the pin 22 projects into the high-pressure chamber 3 such that the
  • the pressure sensor 50 comprises at least one sensor diaphragm 51, in the embodiment of FIG. 1, however, additionally a measuring bridge 52 and an evaluation electronics 53.
  • the measuring bridge 52 is arranged between the sensor diaphragm 51 and the evaluation electronics 53.
  • the measuring bridge 52 is in this case connected to the sensor membrane 51, for example glued to it, that a deformation of the sensor membrane 51 is detected as an electrical signal or as a change of an electrical signal in the measuring bridge 52.
  • the sensor membrane 51 is arranged in or on the recess 40 so that it closes the recess 40 to the high-pressure chamber 3 media-tight.
  • the sensor membrane 51 is welded to the pin 22 of the valve body 21 media-tight, screwed, or pressed into this media-tight.
  • Fig.l is the
  • the measuring bridge 52 usually consisting of strain gauges, for example, glued to the end face of the sensor membrane 51 or applied by thin-film technology.
  • Deformations of the measuring bridge 52 because of the pressure in the high-pressure chamber 3 are passed on to the evaluation electronics 53.
  • the electrical signals are further processed, for example, a pressure of the high-pressure chamber 3 determines it, and if necessary also strengthened to allow a low-interference forwarding, for example, to a control unit.
  • the evaluation electronics 53 are connected to at least one electrically conductive contact cable 34.
  • the contact cable 34 is through the valve body 21 and in
  • valve body 21 is from the valve body 21 or from the
  • Valve housing 12 is guided into a room with atmospheric pressure, where it can be connected, for example, to a control unit.
  • the contact cable 34 may consist of several individual cables, which may also be connected to each other by pins, for example, at the transition of the cable guides from valve body 21 to valve housing 12th
  • the pin 22 of the valve body 21 protrudes into the high-pressure chamber 3 of the high-pressure accumulator 1 such that an annular gap 25 is formed between the outer circumferential surface of the pin 22 and the wall of the high-pressure chamber 3.
  • the annular gap 25 is advantageously designed so that when open
  • Pressure control valve 10 that is, when lifted from the valve seat 20 closing member 30 which flows out of the high-pressure chamber 3 fluid is not throttled through the annular gap 25.
  • the bore connection 35 comprises a blind bore 36 and two radial bores 37.
  • the blind bore 36 leads away from the valve seat 20 into the interior of the valve body 21, in the direction of the recess 40, without being connected thereto. From the blind hole 36 lead the two
  • a valve chamber 38 is formed, from which the at least one exhaust port 15 branches off.
  • the pressure regulating valve 10 When the pressure regulating valve 10 is open, the fluid thus flows from the high pressure chamber 3, via the annular gap 25, the radial bores 37 and the blind bore 36 to
  • the bore connection 35 is due to the required installation space for the pressure sensor 50 as shown with a
  • blind hole 36 and one or more radial bores 37 selected.
  • a bore connection 35 for example, only a single continuous
  • Bore from the valve seat 20 may be formed in the high-pressure chamber 3 or in the annular gap 25.
  • a solenoid actuator 45 is disposed in the valve housing 12 to the closing member
  • a magnetic armature 42 is arranged on the closing member 30, for example, pressed on.
  • the magnet armature 42 is attracted to this when energizing the Magnetaktors 45, so that the armature 42 and with it the
  • Closing member 30 moves in the direction of the valve seat 20. Between the
  • Pressure control valve 10 is shown, i. as a pressure regulating valve 10, in which the closing member 30 lifts off from the valve seat 20 when the energization of the
  • Magnet actuator 45 is interrupted, the invention is not limited to such Pressure control valves 10 limited.
  • the relevant pressure regulating valves 10 can also be referred to as so-called "normally closed"
  • Pressure control valves 10 are executed, in which the closing member 30 is pressed by the spring 47 in the valve seat 20 and by energizing the
  • connection of the pressure control valve 10 to the housing 2 of the high-pressure accumulator 1 is represented by a screw connection between the housing 2 and the Verschschraudschraub Scientific 19.
  • the closure screw 19 acts together with a shoulder of the valve housing 12 and thus presses the valve housing 12 indirectly via the
  • Pressure control valve 10 and the housing 2 possible, for example
  • valve housing 12 can also be connected directly to the housing 2, the VerInstitutschraub Biology 19 would therefore be omitted.
  • FIG. 2 shows the section A-A of Fig.l in the region of the bore connection 35. From the blind hole 36 extend three radial bores 37 star-shaped outward and open into the annular gap 25, which between the
  • High-pressure accumulator 1 is formed.
  • the cable guide 34 is arranged in the valve body 21, that they neither the blind hole 36 nor the
  • the pressure control valve 10 is energized, so that a
  • Magnetic force is generated by the magnetic actuator 45. Due to the magnetic force, the closing member 30 is pressed against the valve seat 20, so that a fluidic connection via the valve seat 20 and the openings 15 in the pressure regulating valve 10th from the high-pressure accumulator 1 to the return line 99 is interrupted. If the energization of the magnetic actuator 45 is interrupted or reduced, the spring 47 and the hydraulic force on the closing member 30 push the armature 42 away from the valve seat 20. The pressure regulating valve 10 is thereby opened, whereby the described fluidic connection opened and a pressure reduction in High-pressure accumulator 1 is made possible.
  • the pressure regulating valve 10 can thus also be operated as a proportional valve by being only partially opened, so that an equilibrium state is established which leads to a resulting pressure in the high-pressure chamber 3.
  • the pressure sensor 50 for determining the pressure in the high-pressure chamber 3 is attached to the end of the pressure regulating valve 10 opposite the magnet actuator 45, namely in the journal 22, so that the region of the pressure regulating valve 10 projects with the pressure sensor 50 into the high-pressure chamber 3. This is
  • the pressure sensor 50 is integrated in the pressure regulating valve 10.
  • annular gap 25, the pin 22 is arranged surrounding such that when the pressure control valve 10 is open from the
  • the regulation of the pressure in the high-pressure chamber 3 by the pressure regulating valve 10 takes place, inter alia, also by the pressure detected by the pressure sensor 50.
  • this pressure in a control unit together with other data - for example, the operating point of an internal combustion engine and the temperatures in the internal combustion engine - evaluated and the pressure control valve 10 and the solenoid actuator 45 driven accordingly.

Landscapes

  • 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 de régulation de pression (10) destinée à réguler la pression dans une chambre haute pression (3) d'un accumulateur haute pression (1), en particulier d'un accumulateur de carburant haute pression. La soupape de régulation de pression (10) comprend un corps de soupape (21), un siège de soupape (20) formé sur le corps de soupape (21) et un obturateur (30). L'obturateur (30) interagit avec le siège de soupape (20) pour ouvrir et fermer une liaison hydraulique entre la chambre haute pression (3) et une chambre basse pression, le corps de soupape faisant saillie au moins partiellement dans la chambre haute pression (3). L'extrémité du corps de soupape (21) orientée vers la chambre haute pression (3) comporte un évidement (40). L'évidement (40) contient un capteur de pression (50) pour déterminer la pression dans la chambre haute pression (3).
EP16707146.3A 2015-04-13 2016-03-02 Soupape de régulation de pression à capteur de pression intégré Withdrawn EP3283757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015206538.3A DE102015206538A1 (de) 2015-04-13 2015-04-13 Druckregelventil mit integriertem Drucksensor
PCT/EP2016/054373 WO2016165872A1 (fr) 2015-04-13 2016-03-02 Soupape de régulation de pression à capteur de pression intégré

Publications (1)

Publication Number Publication Date
EP3283757A1 true EP3283757A1 (fr) 2018-02-21

Family

ID=55446812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16707146.3A Withdrawn EP3283757A1 (fr) 2015-04-13 2016-03-02 Soupape de régulation de pression à capteur de pression intégré

Country Status (3)

Country Link
EP (1) EP3283757A1 (fr)
DE (1) DE102015206538A1 (fr)
WO (1) WO2016165872A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6155233A (en) * 1999-09-07 2000-12-05 Fasco Controls Corp. Combination pressure sensor and regulator for direct injection diesel engine fuel system
US7383851B2 (en) * 2004-10-07 2008-06-10 Eaton Corporation Closed loop pressure control system and electrically operated pressure control valve with integral pressure sensor and method of making same
DE102005004080A1 (de) * 2005-01-28 2006-08-03 Robert Bosch Gmbh Elektromagnetische Druckregelventileinrichtung mit integriertem Drucksensor
DE102008040901A1 (de) 2008-07-31 2010-02-04 Robert Bosch Gmbh Kraftstoffdruckspeicher für ein Einspritzsystem für Brennkraftmaschinen
JP2010249061A (ja) * 2009-04-17 2010-11-04 Denso Corp 燃料噴射弁
US8408516B2 (en) * 2009-04-27 2013-04-02 GM Global Technology Operations LLC Fluid pressure control device with integrated pressure sensor
DE102009026477A1 (de) * 2009-05-26 2010-12-02 Robert Bosch Gmbh Druckregelventil, insbesondere für einen Hochdruckspeicherkörper eines Kraftstoffeinspritzsystems
DE102012224403A1 (de) * 2012-12-27 2014-07-03 Robert Bosch Gmbh Druckregelventil für ein Kraftstoffeinspritzsystem

Also Published As

Publication number Publication date
DE102015206538A1 (de) 2016-10-13
WO2016165872A1 (fr) 2016-10-20

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