EP3128167B1 - Dispositif de détection de fuite pour un tuyau de fluide à double paroi - Google Patents

Dispositif de détection de fuite pour un tuyau de fluide à double paroi Download PDF

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Publication number
EP3128167B1
EP3128167B1 EP15179456.7A EP15179456A EP3128167B1 EP 3128167 B1 EP3128167 B1 EP 3128167B1 EP 15179456 A EP15179456 A EP 15179456A EP 3128167 B1 EP3128167 B1 EP 3128167B1
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EP
European Patent Office
Prior art keywords
detection device
fluid
leakage
control piston
leakage detection
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.)
Active
Application number
EP15179456.7A
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German (de)
English (en)
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EP3128167A1 (fr
Inventor
Andras MAGYAR
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.)
AVL Autokut Engineering Kft
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AVL Autokut Engineering Kft
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 AVL Autokut Engineering Kft filed Critical AVL Autokut Engineering Kft
Priority to ES15179456.7T priority Critical patent/ES2660500T3/es
Priority to EP15179456.7A priority patent/EP3128167B1/fr
Publication of EP3128167A1 publication Critical patent/EP3128167A1/fr
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Publication of EP3128167B1 publication Critical patent/EP3128167B1/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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/006—Measuring or detecting fuel leakage of 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
    • F02M63/0031—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
    • 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
    • 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
    • F02M63/008—Hollow valve members, e.g. members internally guided
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/05—Miscellaneous constructional elements; Leakage detection

Definitions

  • the invention relates to a leakage detection device for a double walled fluid pipe having a drainage jacket surrounding a high pressure pipe, particularly for internal combustion engines, comprising at least one fluid inlet duct for connection to the drainage jacket of the fluid pipe, at least one fluid outlet duct for connection to a leakage conduit, and at least one valve device for control of the flow of leakage fluid through the fluid outlet, the valve device having a spring loaded valve body which can be shifted against a reset force of a reset spring by the pressure of the drainage fluid entering the fluid inlet duct, wherein a first position of the valve body corresponds to a minimal leakage amount and a second position corresponds to maximal leakage amount of the high pressure pipe.
  • the inner pipe has a thick wall and carries the high pressure fuel from the fuel pump(s) to the injector(s). This thick wall pipe must be fully enclosed in an outer jacket over the whole length of the pipe. Such pipes are called double-walled pipes.
  • the purpose of the outer jacket is twofold:
  • the document EP 2 297 448 B1 describes a fuel injection system for a piston engine wherein the supply pipes are provided with double walls, wherein an inner flow space of the supply pipe is for high pressure fuel and an outer flow space acts as a collecting channel for possibly leaking fuel.
  • a leak detector with a control chamber for detecting a fuel leak is connected to the collecting channel.
  • the control chamber is provided with an orifice through which fuel leakage occurring in normal operating conditions can be removed from the control chamber.
  • a leakage outlet is arranged through which excess fuel can be drained.
  • the control chamber is provided with a fuel level detection means for detecting excess leakages.
  • the function of the control chamber is dependent on the mounting orientation.
  • the volume and design of the control chamber are assigned by the allowed leakage amount. Therefore relative installation space has to be available.
  • the publication WO 2009/003717 A1 discloses a fuel system for a combustion engine having a local leakage detection device for a double wall tubing.
  • the pressure based local leakage detection senses piston movement by visual or sensor.
  • the device comprises a check valve being arranged in a leakage passage and opening a fluid passage into a leakage conduit which is fluidly connected to a leakage fluid collecting container.
  • the fluid collecting container is provided with a sensor for detecting a fluid in the container and for issuing a corresponding signal.
  • the detection device described in WO 2009/003717 A1 doesn't consider any allowed leakage.
  • valve body comprises at least one throttle passage for flow connection of the fluid inlet duct and the fluid outlet duct, wherein in each shifting position of the valve body the throttle passage is flow connected to the fluid inlet duct and to the fluid outlet duct.
  • the leakage detection device comprises at least one position detection sensor, wherein at least the second position of the valve body is detected by the position detection sensor.
  • the position detection sensor can be designed as a proximity sensor, for example a Hall-sensor, or a contact sensor. No pressure sensors or level detection means are necessary to detect abovementioned movement of the valve body and trigger a leakage alarm.
  • valve body is a control piston which is slidably mounted in a control cylinder, wherein at least one outlet orifice of the fluid outlet duct is arranged in the cylinder barrel of the control cylinder.
  • control piston comprises at least one control edge sliding across the outlet orifice while the control piston travels from one shifting position to another shifting position.
  • the throttle passage may extend between a first face side and a second face side of the control piston, wherein the first face side is facing the fluid inlet duct, and wherein preferably the second face side is facing the reset spring. Therefore the first face side and the second face side of the control piston are flow connected by the throttle passage.
  • the control piston comprises a slot being formed in the barrel surface of the control piston between the control edge and the second face side of the control piston.
  • the control piston comprises a groove being formed in the barrel face of the control piston below the control edge. The slot and the groove establishes flow connection between the second face side of the control piston and the outlet orifice.
  • Fig. 1 shows schematically a double walled fluid pipe 1, e.g. a fuel pipe of a marine engine, with a high pressure pipe 2 and a drainage jacket 3 surrounding the high pressure pipe 2.
  • a leakage detection device 4 is attached to the drainage jacket 3 via a fluid inlet duct 5. Further the leakage detection device 4 is connected to a leakage conduit (not shown) via a fluid outlet duct 6.
  • the leakage detection device 4 comprises a valve device 7 for control of the flow of leakage fluid through the fluid outlet duct 6.
  • the valve device 7 includes a spring loaded valve body 8 which can be shifted against a reset force of a reset spring 9 by the pressure of the drainage fluid entering the fluid inlet duct 5.
  • valve body 8 is configured as a control piston 11, which is mounted slidably in a control cylinder 12.
  • the control piston is shown in detail in Fig. 4 to Fig. 6 .
  • the cylinder barrel 13 of the control cylinder 12 comprises an outlet orifice 6a leading to the fluid outlet duct 6.
  • the control piston 11 comprises a control edge 14 which is arranged in the barrel surface 15 of the control piston 11 in such a way that it is sliding across the outlet orifice 6a while the control piston 11 travels from one shifting position to another shifting position.
  • the valve body 8 comprises a throttle passage 10 for flow connection of the fluid inlet duct 5 and the fluid outlet duct 6.
  • the throttle passage 10 extends between a first face side 11a (see Fig. 4 ) and a second face side 11b of the control piston 11, wherein the first face side 11a is facing the fluid inlet duct 5 and the second face side 11b is facing the reset spring 9, which is arranged in a spring chamber 17 of the control cylinder 12.
  • the throttle passage 10 is located in/parallel to the longitudinal axis of the control piston 11 (see Fig. 5 ) in the embodiment shown in the figures.
  • other variants with inclined throttle passage or multiple passages or combinations of inclined and straight passages are possible.
  • control piston 8 comprises a slot 18 being formed in the barrel surface 15 of the control piston 11 between the control edge 14 and the second face side 11b of the control piston and a groove 18a being formed in the barrel surface 15 of the control piston 11 below the control edge 14.
  • the slot 18 and the groove 18a are adjacent to the control edge 14.
  • the top edge of the groove 18a has to be the same as the lower edge of the control edge 14.
  • the flow cross section areas of the slot 18 and the groove 18a have to be bigger than the cross section of the throttle passage 10.
  • the height h1 of the outlet orifice 6a has to be bigger than the high h2 of the control edge 14.
  • the slot 18 basically runs parallel to a longitudinal axis of the piston 11 (in the embodiment shown also parallel to the throttle passage 10).
  • the groove 18a runs in a plane perpendicular to the longitudinal axis of the piston 11 around the circumference/barrel surface 15 of the control piston 11.
  • the throttle passage 10 and the groove 18 enable minimal fluid flow between the fluid inlet duct 5 and the fluid outlet duct 6 in each position of the control piston 11 other than the second end position shown in Fig. 3 .
  • a first end position of the valve body 8 (shown in Fig. 1 ) corresponds to a minimal leakage amount and a second end position (shown in Fig. 3 ) corresponds to maximal leakage amount of the high pressure pipe 2.
  • the leakage detection device 4 comprises a position detection sensor 19 which may be configured as proximity sensor, e.g. hall-sensor, or as a simple contact sensor.
  • leakage fluid is indicated by arrows 20.
  • Leakage fluid is indicated as dashed areas.
  • a second part 20b of the fluid inside the control cylinder 12 flows from the fluid inlet duct 5 through the throttle passage 10 into the spring chamber 17, and is drained via the groove 18a and the slot 18 to the outlet orifice 6a, as shown in Fig. 2 .
  • the position detection sensor 19 is arranged and configured in a way to detect this position of the control piston 11 shown in Fig. 2 .
  • control piston 11 travels to the second end position shown in Fig. 3 .
  • the flow conduit between the slot 18 and the groove 18a and the outlet orifice 6a is closed by the control edge 14 of the control piston 11, so the whole amount of leakage fluid which is fed through the fluid inlet duct 5 into the control cylinder 12 is drained directly to the outlet orifice 6a passing the upper region 16 of the control edge 14.
  • the described leakage detection device 4 enables fail-safe function independent of the installation position and the mounting orientation. Compared with state in the art devices the leakage detection device according to the invention is compact and requires only little installation space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Fluid-Driven Valves (AREA)

Claims (9)

  1. Dispositif de détection de fuites (4) destiné à un tuyau de transfert de fluide (1) à double paroi, ayant une enveloppe d'écoulement (3) entourant un tuyau haute pression (2) comprenant :
    - au moins un canal d'entrée de fluide (5) destiné à être connecté à l'enveloppe d'écoulement (3) du tuyau de transfert de fluide (1),
    - au moins un canal de sortie de fluide (6) destiné à être connecté à une conduite de fluide,
    - au moins un dispositif de soupape (7) permettant la commande du flux de fluide de fuite au travers du canal de sortie de fluide (6), le dispositif de soupape (7) ayant un corps de soupape (8) précontraint élastiquement qui peut être décalé contre la force d'un ressort de rappel (9) par la pression du fluide d'écoulement entrant dans le canal d'entrée de fluide (5), une première position du corps de soupape (8) correspondant à une valeur de fuite minimum et une seconde position d'extrémité de ce corps de soupape correspondant à une valeur de fuite maximum du tuyau haute-pression,
    caractérisé en ce que
    le corps de soupape (8) comprend au moins un passage étranglé (10) permettant la connexion fluidique du canal d'entrée de fluide (5) et du canal de sortie de fluide (6), dans chacune des positions décalées du corps de soupape (8), le passage étranglé (10) étant en communication fluidique avec le canal d'entrée de fluide (5) et le canal de sortie de fluide (6).
  2. Dispositif de détection de fuites (4) conforme à la revendication 1, caractérisé en ce qu'
    il comprend au moins un capteur de détection de position (19), au moins la seconde position du corps de soupape (8) pouvant être détectée par le capteur de détection de position (19).
  3. Dispositif de détection de fuites (4) conforme à la revendication 1 ou 2,
    caractérisé en ce que
    le capteur de détection de position (19) est un capteur de proximité, de préférence un capteur à effet Hall.
  4. Dispositif de détection de fuites (4) conforme à la revendication 1 ou 2,
    caractérisé en ce que
    le capteur de détection de position (19) est un capteur de contact.
  5. Dispositif de détection de fuites (4) conforme à l'une des revendications 1 à 4,
    caractérisé en ce que
    le corps de soupape (8) est un piston de commande (11) monté coulissant dans un cylindre de commande (12), au moins un orifice de sortie (6a) du canal de sortie de fluide (6) étant situé dans la surface enveloppe cylindrique (13) du cylindre de commande (12).
  6. Dispositif de détection de fuites (4) conforme à la revendication 5,
    caractérisé en ce que
    le piston de commande (11) comporte au moins un bord de commande (14) glissant au travers de l'orifice de sortie (6a) lorsque le piston de commande (11) se déplace d'une position décalée à une autre position décalée.
  7. Dispositif de détection de fuites (4) conforme à la revendication 5 ou 6,
    caractérisé en ce que
    le passage étranglé (10) s'étend entre une première face (11a) et une seconde face (11b) du piston de commande (11), la première face étant située en regard du canal d'entrée de fluide (5) et de préférence la seconde face (11b) étant située en regard du ressort de rappel (9).
  8. Dispositif de détection de fuites (4) conforme à la revendication 6 ou 7,
    caractérisé en ce que
    le piston de commande (11) comporte une fente (18) formée sur la surface enveloppe (15) du piston de commande (11) entre le bord de commande (14) et la seconde face (11b) de ce piston de commande (11).
  9. Dispositif de détection de fuites (4) conforme à la revendication 7 ou 8,
    caractérisé en ce que
    le piston de commande (11) comporte une rainure (18a) formée dans la surface enveloppe (15) de ce piston de commande (11) au-dessous du bord de commande (14) de celui-ci.
EP15179456.7A 2015-08-03 2015-08-03 Dispositif de détection de fuite pour un tuyau de fluide à double paroi Active EP3128167B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES15179456.7T ES2660500T3 (es) 2015-08-03 2015-08-03 Dispositivo de detección de fugas para una tubería de fluido de doble pared
EP15179456.7A EP3128167B1 (fr) 2015-08-03 2015-08-03 Dispositif de détection de fuite pour un tuyau de fluide à double paroi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15179456.7A EP3128167B1 (fr) 2015-08-03 2015-08-03 Dispositif de détection de fuite pour un tuyau de fluide à double paroi

Publications (2)

Publication Number Publication Date
EP3128167A1 EP3128167A1 (fr) 2017-02-08
EP3128167B1 true EP3128167B1 (fr) 2017-12-20

Family

ID=53886860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15179456.7A Active EP3128167B1 (fr) 2015-08-03 2015-08-03 Dispositif de détection de fuite pour un tuyau de fluide à double paroi

Country Status (2)

Country Link
EP (1) EP3128167B1 (fr)
ES (1) ES2660500T3 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI119702B (fi) * 2003-10-17 2009-02-13 Waertsilae Finland Oy Polttomoottorin laitteisto korkeapaineputken vuotoja varten
EP2011996B1 (fr) 2007-07-04 2012-03-14 Caterpillar Motoren GmbH & Co. KG Système de carburant pour moteur à combustion équipé d'un détecteur de fuites locales
FI120886B (fi) 2008-06-05 2010-04-15 Waertsilae Finland Oy Polttoaineen ruiskutusjärjestelmä mäntämoottorille
DE102009045894A1 (de) * 2009-10-21 2011-04-28 Robert Bosch Gmbh Kraftstoffeinspritzsystem mit einem Ventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2660500T3 (es) 2018-03-22
EP3128167A1 (fr) 2017-02-08

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