EP2960485A1 - Vanne de controle - Google Patents

Vanne de controle Download PDF

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Publication number
EP2960485A1
EP2960485A1 EP15171107.4A EP15171107A EP2960485A1 EP 2960485 A1 EP2960485 A1 EP 2960485A1 EP 15171107 A EP15171107 A EP 15171107A EP 2960485 A1 EP2960485 A1 EP 2960485A1
Authority
EP
European Patent Office
Prior art keywords
fuel
control
control valve
valve
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.)
Withdrawn
Application number
EP15171107.4A
Other languages
German (de)
English (en)
Inventor
Thierry Thibault
Marion Balin
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.)
Delphi International Operations Luxembourg SARL
Original Assignee
Delphi International Operations Luxembourg SARL
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 Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Publication of EP2960485A1 publication Critical patent/EP2960485A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
    • 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

Definitions

  • the present disclosure relates to a control valve assembly for a fuel injector; and to a fuel injector.
  • FIG. 1 A sectional view of a known control valve assembly 3 is schematically represented in Figure 1 .
  • the fuel pressure within the control chamber 5 acts upon a surface associated with a needle valve (not shown) of the injector to apply a force to the needle valve urging the needle valve towards a needle seating.
  • the control valve assembly 3 comprises a valve housing 7 which is provided with a bore 9 within which a valve stem 11 is movable.
  • the valve stem 11 includes a control valve 13 which is engageable with a valve seat 15 defined around an upper end 17 of the bore 9.
  • the valve stem 11 is movable between a closed position in which the control valve 13 is seated in the valve seat 15, and an open position in which the control valve 13 is lifted from the valve seat 15.
  • the control chamber 5 communicates through a control line 19 with a chamber 21 defined between a region 23 of the valve stem 11 of reduced diameter and the bore 9 within which the valve stem 11 is movable.
  • a volume of fuel which is required to maintain a pressurised environment within the control chamber 5, flows past the control valve 13.
  • the fuel exits the fuel injector 1 through a return line (not shown) downstream of the control valve 13.
  • the fuel flows out of the fuel injector 1 via an outlet of the return line, where it is subsequently directed to a reservoir for re-use in a subsequent injection cycle.
  • a fuel flow restriction 25 is provided at an outlet 27 of the control chamber 5, upstream of the control line 19.
  • the second pressure drop is from approximately 200 bars upstream of the valve seat 15 to approximately 5 bars downstream of the valve seat 15.
  • the inertia of the fuel may create a localized region of very low pressure proximal to the valve seat 15 which can induce cavitation in the fuel (i.e. vapour cavities form in the fuel). It is believed that cavitation in the fuel may result in damage to the valve seat 15. Any such damage may affect performance of the fuel injector 1.
  • the present invention sets out to overcome or ameliorate at least some of the problems associated with known fuel injectors.
  • aspects of the present invention relate to a control valve assembly for a fuel injector; and to a fuel injector.
  • a control valve assembly for controlling fuel pressure within a control chamber of a fuel injector, the control valve assembly comprising:
  • the fuel flow restriction can be adapted such that, in use, the fuel pressure in said region between the valve seat and the fuel flow restriction is greater than or equal to 1000 bars, 1500 bars, 2000 bars or 2300 bars.
  • This fuel pressure can represent a mean operating pressure or a peak operating pressure of the fuel in the region between the valve seat and the fuel flow restriction.
  • the fuel flow restriction can be configured such that, in use, the fuel pressure proximate to the valve seat can remain significantly above a vapour pressure of the fuel.
  • the fuel flow restriction can be configured to maintain the fuel pressure in the region between the valve seat and the fuel flow restriction sufficiently high to ensure that, in use, the localized low pressure region established when the control valve is moved to said closed position always remains at a pressure greater than a vapour pressure of the fuel.
  • the vapour pressure of diesel fuel is approximately 1 mbar at 20°C.
  • the fuel flow restriction can be in the form of a fuel flow restrictor.
  • the fuel flow restrictor can, for example, have a diameter of between 0.1 mm and 0.5mm (inclusive). More particularly, the fuel flow restrictor can have a diameter of between 0.2mm and 0.4mm (inclusive).
  • the fuel flow restrictor can have a length of between 0.3mm to 0.7mm (inclusive).
  • the fuel flow restriction can be configured depending on the operating parameters of the fuel injector.
  • control valve When the control valve is in the closed position, the control valve is seated in the valve seat and fluid communication between the fuel control line and the fuel return line is inhibited. When the control valve is in the open position, the control valve is lifted from the valve seat and fluid communication between the fuel control line and the fuel return line is enabled.
  • a first fuel pressure differential is established across the control valve (i.e. fuel pressure upstream of the control valve is greater than fuel pressure downstream of the control valve); and a second fuel pressure differential is established across the fuel flow restriction (i.e. fuel pressure upstream of the fuel flow restriction is greater than fuel pressure downstream of the fuel flow restriction).
  • the fuel flow restriction can be configured such that the second fuel pressure differential is greater than the first fuel pressure differential.
  • An additional fuel flow restriction could be provided upstream of the valve seat, for example in the fuel control line, to control fuel flow between the control chamber in the fuel injector and the control valve.
  • the additional fuel flow restriction can cause a reduction in the fuel pressure upstream of the valve seat to below the fuel pressure in the control chamber.
  • the additional fuel flow restriction upstream of the control valve can thereby reduce the first pressure differential established across the control valve.
  • cavitation at the valve seat may be reduced.
  • the fluid pathway upstream of the valve seat i.e. between the control chamber and the control valve, can be substantially unrestricted. In this configuration, the fuel pressure upstream of the valve seat is at least substantially equal to the fuel pressure in the control chamber.
  • a return chamber can be disposed between the valve seat and the fuel flow restriction.
  • the return chamber can be disposed downstream of the valve seat and upstream of the fuel flow restriction.
  • the fuel flow restriction can be adapted such that, in use, the fuel pressure in the return chamber is greater than or equal to 1000 bars, 1500 bars, 2000 bars or 2300 bars.
  • the fuel pressure in the return chamber could be approximately 2300 bars.
  • the fuel flow restriction is adapted such that, in use, the fuel pressure in the return chamber proximate to the valve seat can be maintained greater than or equal to the vapour pressure of the fuel irrespective of the operating condition of the control valve.
  • the fuel flow restriction can be disposed at or proximate to an inlet of the fuel return line.
  • the fuel flow restriction can be formed in the fuel return line.
  • the fuel flow restriction can be disposed downstream of an inlet of the fuel return line.
  • the control valve assembly can comprise a valve insert.
  • the valve insert can comprise a bore in which the control valve is movable mounted.
  • the fuel flow restriction can be formed in the valve insert.
  • the valve insert can be omitted.
  • the control valve assembly can comprise a valve body.
  • the fuel flow restriction can be disposed in the valve body.
  • the fuel flow restriction can be machined in the valve body.
  • the control valve assembly can comprise an upper valve guide and a lower valve guide disposed on respective sides of the valve seat.
  • the upper and lower valve guides can be defined by the valve body.
  • the control valve assembly comprises a valve insert
  • the upper and lower valve guides can be defined by the valve insert.
  • a control valve assembly for a fuel injector, the control valve assembly comprising a control valve and a valve seat, the control valve being movable between a closed position in which fluid communication is inhibited and an open position in which fluid communication is enabled; wherein the control valve assembly comprises a fuel flow restriction disposed downstream of the valve seat for restricting the flow of fuel into or through a fuel return line.
  • a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, the fuel injector comprising a control valve assembly as described herein.
  • the fuel injector can comprise a control chamber for controlling a needle valve, the control chamber being connected to the fuel control line.
  • the fluid communication between the control chamber and the fuel return line is inhibited when the control valve is in said closed position and fluid communication between the control chamber and the fuel return line is enabled when the control valve is in said open position.
  • a fluid pathway between the control chamber and the control valve is substantially unrestricted.
  • the fuel control line does not include a fuel flow restriction.
  • a fuel injector 101 in accordance with a first embodiment of the present invention will now be described with reference to Figures 3 and 4 .
  • the fuel injector 101 is configured for delivering fuel into a combustion chamber (not shown) of an associated internal combustion engine.
  • the fuel injector 101 has particular application in a compression-ignition engine (i.e. a diesel engine), but the present invention could be implemented in a fuel injector for a spark-ignition engine (i.e. a gasoline engine).
  • the terms “lower” and “upper” are herein used in relation to the orientation of the fuel injector 101 shown in the Figures, and the terms “downstream” and “upstream” are herein used in relation to the normal direction of the flow of fuel in the fuel injector 101.
  • the fuel injector 101 comprises a control valve assembly 103 for controlling actuation of a needle valve (not shown) which is movable towards and away from a needle seating (not shown) so as to control fuel injection from an injection nozzle into a combustion chamber of an internal combustion engine.
  • the control valve assembly 103 is provided to control fuel pressure within a control chamber 105 to control the actuation of the needle valve.
  • the control valve assembly 103 comprises a valve body 107, a valve insert 108 and a valve member 109.
  • the valve insert 108 is mounted in a first bore 110 formed in the valve body 107.
  • the valve insert 108 is a cylindrical valve insert.
  • the valve member 109 is mounted in a second bore 111 formed in the valve insert 108.
  • the valve member 109 comprises an upper valve guide 113 and a lower valve guide 114, an armature 115 fixedly mounted to the upper valve guide 113, and a valve stem 117.
  • the valve stem 117 is arranged between the upper valve guide 113 and the lower valve guide 114.
  • the valve stem 117 includes a control valve 119 which cooperates with a valve seat 121, as will be explained in more detail below.
  • control valve 119 is an annular valve.
  • the upper valve guide 113 and the lower valve guide 114 are located on respective sides of the control valve 119.
  • the valve member 109 has a reduced diameter between the control valve 119 and the lower valve guide 114 to form a return chamber 123.
  • the return chamber 123 is annular and is located downstream of the control valve 119 and upstream of the lower valve guide 114.
  • a solenoid (not shown) is adapted to actuate the armature 115 of the valve member 109 and, thereby, to control communication between a control line 125, which is in fluid communication with the control chamber 105, and a fuel return line 127, disposed downstream of the return chamber 123.
  • the control line 125 is a high pressure line, for example fuel pressure within the control line 125 is higher than 2000 bars.
  • the fuel return line 127 is a low pressure line, for example fuel pressure within the fuel return line 127 is lower than 50 bars.
  • the sidewall of the return chamber 123 is defined by an inner surface 129 of the valve insert 108.
  • the valve insert 108 comprises an intermediate region 131 defining the valve seat 121 for receiving the control valve 119.
  • the valve member 109 When the control valve 119 is seated in the valve seat 121, the valve member 109 is in a closed position and fluid communication between the control chamber 105 and the fuel return line 127 is inhibited.
  • the valve member 109 is in an open position when the control valve 119 is lifted from the valve seat 121.
  • the control valve 119 is in the open position, the control chamber 105 and the fuel return line 127 are in fluid communication.
  • the control valve 119 is shown in the open position.
  • An outer annular recess 133 is formed in an outer surface 135 of the valve insert 108 to form a pressure compensating chamber 137.
  • the pressure compensating chamber 137 is configured to distribute the pressure of the fuel flowing from the control line 125 around the valve stem 117.
  • the pressure compensating chamber 137 remains in fluid communication with the control line 125.
  • An aperture 139 is formed in the valve insert 108 to maintain fluid communication between the pressure compensating chamber 137 and the control line 125. In the present embodiment, the aperture 139 is inclined relative to a longitudinal axis of the valve insert 108 to form a continuation of the control line 125.
  • the control line 125 is defined between an outlet 149 of the control chamber 105 and the aperture 139 of the valve insert 108.
  • the outer annular recess 133 defines upper and lower flanges 141, 143 which are a restriction fit in the first bore 110 to sealingly mount the valve insert 108 in the valve body 107.
  • An annular channel 145 is formed around the circumference of the valve insert 108 and is adapted to communicate with the fuel return line 127.
  • the armature 115 of the valve member 109 is fixedly mounted to an upper end 147 of the upper valve guide 113 and is moveable under the influence of a magnetic field generated, in use, by an actuator comprising a solenoid (not shown).
  • the solenoid is configured to cooperate with the armature 115 to control actuation of the valve member 109. More precisely, the solenoid is selectively energized to displace the valve member 109 to the open position in which the control valve 119 is lifted from the valve seat 121.
  • a spring member (not shown) is provided within the actuator for biasing the valve member 109 to the closed position in which the control valve 119 is seated the valve seat 121.
  • a fuel flow restriction 151 is provided downstream of the valve seat 121 for restricting the flow of fuel through the fuel return line 127.
  • the fuel flow restriction 151 is in the form of a restrictor having a length of between 0.3mm to 0.7mm (inclusive) and a diameter between 0.2mm and 0.4mm (inclusive).
  • the fuel flow restriction 151 is provided within the valve insert 108, at an inlet 153 of the fuel return line 127.
  • the fuel flow restriction 151 is in fluid communication with the return chamber 123 and with the fuel return line 127.
  • the fuel flow restriction 151 is provided to maintain the fuel pressure in the return chamber 123 above the fuel pressure in the fuel return line 127 (i.e. greater than the fuel return pressure).
  • the fuel pressure in the return chamber 123 is, for example, maintained above 2000 bars.
  • the fuel flow restriction 151 establishes a fuel pressure differential between the return chamber 123 and the fuel return line 127.
  • the dimensions of the fuel flow restriction 151 are chosen to ensure that the fuel pressure within the control chamber 105 remains above a vapour pressure of the fuel such that cavitation can be at least partially suppressed at the valve seat 121.
  • the formation of vapour cavities in the fuel can be reduced or removed. At least in certain embodiments, damage to the valve seat 121 can be reduced, thereby helping to maintain performance of the control valve 119.
  • control valve 119 is in the closed position.
  • the control valve 119 is seated in the valve seat 121, and communication between the control chamber 105 and the fuel return line 127 is inhibited.
  • the solenoid is energized and actuates the armature 115.
  • the armature 115 and the valve member 109 are displaced towards the solenoid such that the control valve 119 is lifted from the valve seat 121, to the open position.
  • the fuel pressure in the control chamber 105 decreases.
  • the needle valve of the fuel injector 101 lifts from its seating to inject fuel into the cylinder.
  • the fuel pressure in the control line 125 is substantially equal to the fuel pressure in the control chamber 105.
  • valve seat 121 When the control valve 119 lifts, the restriction formed by the valve seat 121 and the control valve 119 causes a first pressure differential to be established across the control valve 119, i.e. the fuel upstream of the control valve 119 is at a higher pressure than the fuel downstream of the control valve 119.
  • fuel pressure upstream of the valve seat 121 is approximately 2500 bars and fuel pressure downstream of the valve seat 121 is approximately 2300 bars.
  • the fuel flow restriction 151 restricts the flow of fuel from the return chamber 123 into the fuel return line 127.
  • the fuel pressure in the return chamber 123 is therefore higher than the fuel return pressure in the fuel return line 127.
  • a second pressure differential is established across the fuel flow restriction 151.
  • the fuel pressure in the fuel return line 127, or fuel return pressure, downstream of the fuel flow restriction 151 is at approximately 5 bars.
  • the fuel then flows out of the fuel injector 1 via an outlet of the fuel return line 127, where it is subsequently directed to a reservoir for re-use in a subsequent injection cycle.
  • the solenoid In order to terminate injection, the solenoid is de-energised, and the spring member biases the armature 115 away from the solenoid and the control valve 119 towards the valve seat 121, thereby displacing the valve member 109 to the closed position.
  • Such movement of the control valve 119 prevents further fuel from flowing from the control chamber 105 to the fuel return line 127, and the continued supply of fuel from the high pressure fuel supply line to the control chamber 105 results in an increase of the fuel pressure within the control chamber 105. Therefore, the fuel pressure applied to the upper end of the needle valve increases, and a point will be reached beyond which the action of the fuel pressure within the control chamber 105 in combination with the action of the spring member is sufficient to cause the needle valve to move towards engagement with its seating and terminate injection.
  • the inertia of the fuel creates a low pressure region at or proximal to the valve seat 121.
  • the fuel flow restriction 151 maintains the fuel pressure in the return chamber 123 at a higher pressure than the fuel pressure in the fuel return line 127 (i.e. the fuel in the return chamber 123 is at a higher pressure than the fuel return pressure).
  • the increased pressure in the return chamber 123 helps to reduce or inhibit cavitation at the valve seat 121.
  • the fuel flow restriction 151 is configured such that the fuel pressure in the return chamber 123 is sufficiently high that the fuel pressure remains at or above the vapour pressure of the fuel even in the low-pressure region established proximate to the valve seat 121 due to the inertia of the fuel when the control valve 119 closes.
  • the fuel injector 101 has been described having the fuel flow restriction 151 formed in the valve insert 108 of the fuel injector 101.
  • a fuel injector 201 according to a second embodiment of the present invention is shown in Figure 5 .
  • the second embodiment corresponds closely to the first embodiment and like reference numerals have been used for like components.
  • a fuel flow restriction 251 is formed in the fuel return line 127.
  • the fuel flow restriction 251 is disposed downstream of the inlet to the fuel return line 127.
  • the operation of the modified fuel injector 201 is unchanged from the embodiment 101 described above.
  • the fuel flow restriction 251 is adapted to restrict the flow of fuel through the fuel return line downstream of the valve seat 121.

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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)
EP15171107.4A 2014-06-24 2015-06-09 Vanne de controle Withdrawn EP2960485A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB1411162.9A GB201411162D0 (en) 2014-06-24 2014-06-24 Control valve

Publications (1)

Publication Number Publication Date
EP2960485A1 true EP2960485A1 (fr) 2015-12-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15171107.4A Withdrawn EP2960485A1 (fr) 2014-06-24 2015-06-09 Vanne de controle

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EP (1) EP2960485A1 (fr)
GB (1) GB201411162D0 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3084702A1 (fr) * 2018-08-01 2020-02-07 Delphi Technologies Ip Limited Methode d'assemblage d'une vanne hydraulique
WO2020143914A1 (fr) * 2019-01-09 2020-07-16 Delphi Technologies Ip Limited Vanne hydraulique
WO2022184777A1 (fr) * 2021-03-02 2022-09-09 Delphi Technologies Ip Limited Injecteur amélioré

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5975428A (en) * 1996-06-15 1999-11-02 Robert Bosch Gmbh Fuel injection device for internal combustion engines
US5979790A (en) * 1997-05-09 1999-11-09 Fev Motorentechnik Gmbh & Co. Kg Controllable fuel injection valve for an internal-combustion engine
WO2004051071A1 (fr) * 2002-12-05 2004-06-17 Robert Bosch Gmbh Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection
EP1614893A1 (fr) * 2004-07-06 2006-01-11 Denso Corporation Injecteur du type Common-Rail
US20060086818A1 (en) * 2001-06-29 2006-04-27 Friedrich Boecking Fuel injector with injection course shaping by means of switchable throttle elements- -
DE102005026967A1 (de) * 2005-06-10 2006-12-14 Siemens Ag Ventil, insbesondere Servoventil
JP2009133324A (ja) * 2004-07-06 2009-06-18 Denso Corp コモンレール用インジェクタ
US20130153686A1 (en) * 2011-12-14 2013-06-20 Delphi Technologies Holding, S.Arl Fuel injector
WO2014164436A1 (fr) * 2013-03-11 2014-10-09 Stanadyne Corporation Injecteur à rampe commune comprenant une chambre à pression régulée

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5975428A (en) * 1996-06-15 1999-11-02 Robert Bosch Gmbh Fuel injection device for internal combustion engines
US5979790A (en) * 1997-05-09 1999-11-09 Fev Motorentechnik Gmbh & Co. Kg Controllable fuel injection valve for an internal-combustion engine
US20060086818A1 (en) * 2001-06-29 2006-04-27 Friedrich Boecking Fuel injector with injection course shaping by means of switchable throttle elements- -
WO2004051071A1 (fr) * 2002-12-05 2004-06-17 Robert Bosch Gmbh Dispositif d'injection de carburant comportant une soupape de commande 3/3 voies pour la modulation du processus d'injection
EP1614893A1 (fr) * 2004-07-06 2006-01-11 Denso Corporation Injecteur du type Common-Rail
JP2009133324A (ja) * 2004-07-06 2009-06-18 Denso Corp コモンレール用インジェクタ
DE102005026967A1 (de) * 2005-06-10 2006-12-14 Siemens Ag Ventil, insbesondere Servoventil
US20130153686A1 (en) * 2011-12-14 2013-06-20 Delphi Technologies Holding, S.Arl Fuel injector
WO2014164436A1 (fr) * 2013-03-11 2014-10-09 Stanadyne Corporation Injecteur à rampe commune comprenant une chambre à pression régulée

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3084702A1 (fr) * 2018-08-01 2020-02-07 Delphi Technologies Ip Limited Methode d'assemblage d'une vanne hydraulique
WO2020143914A1 (fr) * 2019-01-09 2020-07-16 Delphi Technologies Ip Limited Vanne hydraulique
KR20210110873A (ko) * 2019-01-09 2021-09-09 델피 테크놀로지스 아이피 리미티드 유압 밸브
CN113498452A (zh) * 2019-01-09 2021-10-12 德尔福知识产权有限公司 液压阀
CN113498452B (zh) * 2019-01-09 2023-08-08 德尔福知识产权有限公司 液压阀
WO2022184777A1 (fr) * 2021-03-02 2022-09-09 Delphi Technologies Ip Limited Injecteur amélioré
GB2604353B (en) * 2021-03-02 2024-05-29 Phinia Delphi Luxembourg Sarl Improved Injector

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