EP0399402B1 - Druckregler für den Druck innerhalb der Brennstoffspeisesammelleitung einer Brennstoffspeisevorrichtung eines Verbrennungsmotors - Google Patents

Druckregler für den Druck innerhalb der Brennstoffspeisesammelleitung einer Brennstoffspeisevorrichtung eines Verbrennungsmotors Download PDF

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Publication number
EP0399402B1
EP0399402B1 EP19900109460 EP90109460A EP0399402B1 EP 0399402 B1 EP0399402 B1 EP 0399402B1 EP 19900109460 EP19900109460 EP 19900109460 EP 90109460 A EP90109460 A EP 90109460A EP 0399402 B1 EP0399402 B1 EP 0399402B1
Authority
EP
European Patent Office
Prior art keywords
fuel
manifold
fuel supply
pressure regulator
seat
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.)
Expired - Lifetime
Application number
EP19900109460
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English (en)
French (fr)
Other versions
EP0399402A1 (de
Inventor
Innocenzo Triolo
Stefano Morara
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.)
Weber SRL
Original Assignee
Weber SRL
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 Weber SRL filed Critical Weber SRL
Publication of EP0399402A1 publication Critical patent/EP0399402A1/de
Application granted granted Critical
Publication of EP0399402B1 publication Critical patent/EP0399402B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators

Definitions

  • the present invention relates to a pressure regulator for regulating the fuel pressure inside a supply manifold forming part of an internal combustion engine fule supply device, of the type indicated in the preamble of claim 1.
  • Known regulators of the aforementioned type substantially comprise a cup-shaped body having a side and bottom wall, and defining a fuel chamber communicating with a fuel inlet and outlet hole.
  • the outlet hole is controlled by a plunger connected to a deformable diaphragm forming a wall of the fuel chamber and which is subjected to the action of a spring designed to normally maintain the plunger against a corresponding seat and so close the outlet hole.
  • the fuel inlet hole is usually formed inside or communicates with a fitting secured to the side wall of the body, or inside the bottom wall of the body.
  • the outlet hole is usually formed inside or communicates with a fitting projecting from the bottom wall or the lateral surface of the body and usually forming part of a coupling in which a seat is also formed for the plunger.
  • the regulator presents a fairly complex structure.
  • the aim of the present invention is to provide a pressure regulator of the aforementioned type, designed to overcome the above drawbacks typically associated with known regulators.
  • a pressure regulator for regulating the fuel pressure inside a fuel supply manifold forming part of an internal combustion engine fuel supply device, as defined in claim 1.
  • the pressure regulator substantially comprises a cup-shaped body 1 having a side wall 2 and a bottom wall 3 defining a fuel chamber 4 communicating with a fuel inlet hole 5 and a fuel outlet hole 6.
  • Said outlet hole 6 is controlled by a plunger 7 connected to a deformable diaphragm 8 forming one wall of chamber 4 and subjected to the action of a spring 9 designed to normallu maintain plunger 7 against a corresponding seat 10 and so close outlet hole 6.
  • Inlet hole 5 communicates with an inlet fitting 12 projecting from bottom wall 3 and connectable in fluidtight manner inside a seat 13 on a manifold 14 forming part of the supply device.
  • Outlet hole 6 communicates with an outlet fitting 15 projecting from the lateral surface 16 of body 1 and having its axis substantially perpendicular to the longitudinal axis of body 1.
  • Outlet hole 6 comprises a first hole portion 6a having its axis parallel to said longitudinal axis, and a second portion 6b perpendicular to said first portion 6a and formed inside outlet fitting 15.
  • Said first portion 6a houses a coupling 17, one end of which presents seat 10 for plunger 7.
  • Inlet hole 5 comprises at least a first portion 5a formed inside inlet fitting 12, and a second portion 5b formed inside bottom wall 3.
  • Inlet fitting 12 presents an annular groove 18 housing a seal 19 for sealing seat 13 on manifold 14, as shown clearly in Fig.1.
  • Body 1 is formed, e.g. die-cast, in one piece with inlet and outlet fittings 12 and 15, or may be formed from a drawn sheet metal element, in which case, fitting 15 may be welded in a radial hole on the body, and coupling 17 secured to the inside end.
  • the pressure regulator according to the present invention also comprises a cover 22, the edge of which is turned about a corresponding edge 21 of body 1, as shown clearly in Fig.1.
  • cover 22 also acts a support for one end of spring 9, the other end of which conveniently rests, in known manner, on a ring 23 connected to a disc 24 in turn resting on plunger 7.
  • the pressure regulator described above is designed to maintain the fuel pressure inside manifold 14 substantially constant: the fuel in manifold 14 communicates with chamber 4 on the regulator via hole 5; when the pressure inside chamber 4 exceeds a predetermined value, the force exerted on deformable diaphragm 8 overcomes the elastic reaction of spring 9, thus detaching plunger 7 from seat 10, enabling communication between chamber 4 and outlet hole 6, and draining off sufficient fuel for restoring the pressure inside chamber 4 to the required value.
  • the pressure regulator described above may be fitted to a highly straightforward manifold 14 substantially comprising a single central duct with a substantially cup-shaped end housing 25.
  • a slot 26 in the side wall of the housing as shown clearly in Fig. 1.
  • the regulator is connectable to the manifold in exactly the same way as already described.
  • the regulator according to the present invention provides for accurately regulating the pressure inside manifold 14 by virtue of the rapid response afforded by the pressure inside the manifold being transmitted with practically no load loss to chamber 4 on the regulator. This is due to the design, arrangement and size of fuel inlet holes 5, which, in addition to being arranged substantially axially, may present a large diameter occupying substantially the entire section of inlet fitting 12 and most of the section of bottom wall 3 of body 1.
  • the design of the regulator is extremely straightforward, by virtue of consisting of a small number of easy-to-make components.
  • Body 1 in particular, may be formed in one piece using any appropriate technique enabling low-cost production.

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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)
  • Control Of Fluid Pressure (AREA)

Claims (3)

  1. Ein Druckregler zum Regeln des Treibstoffdrucks im Inneren eines Treibstoffzufuhrverteiler (14), der einen Teil einer Kraftstoffzufuhrvorrichtung einer Verbrennungskraftmaschine bildet, wobei diese Vorrichtung einen becherförmigen Körper (1) enthält, der im wesentlichen aus einer Seitenwand (2) und einer Bodenwand (3) besteht, die eine Treibstoffkammer (4) definieren, die in Verbindung steht mit einem Treibstoffeinraßloch (5) und einem Treibstoffauslaßloch (6), welches von einem Kolben (7) gesteuert wird, der mit einer deformierbaren Membran (8) verbunden ist, die eine Wand der Kammer (4) bildet und der Kraft einer Feder (9) unterworfen ist, die so ausgelegt ist, daß sie normalerweise den Kolben (7) gegen den zugehörigen Sitz (10) drückt und so das Auslaßloch (6) schließt; wobei das Treibstoffeinlaßloch (5) in Verbindung mit einem Einlaßanschluß (12) steht, der von der Bodenwand (3) des Körpers (1) hervorsteht und in flüssigkeitsdichter Weise in einem Sitz (13) des Verteilers (14) anschließbar ist, und das Treibstoffauslaßloch (6) mit einem Auslaßanschluß (15) in Verbindung steht, welcher von der Seitenfläche (16) des Körpers (1) hervorsteht,
    dadurch gekennzeichnet, daß der Einlaßanschluß (12) durch ein einstückig mit dem becherförmigen Körper (1) ausgebildetes Muffenelement gebildet ist und über die Bodenwand (3) hervorsteht, und der Auslaßanschluß (15) durch einen angeformten Vorsprung dieser Seitenwand (2) gebildet wird, der sich von der Seitenfläche (16) nach außen erstreckt und dessen Achse senkrecht auf der Längsachse des Körpers (1) steht, und daß die Seitenwand (2) einen ringförmigen Bund (21) bildet, der radial von ihrem Rand nach außen hervorsteht und von einem umgebogenen Rand eines Deckels (22) umfaßt wird, so daß der Außenrand der Membran (8) zwischen dem umgebogenen Rand und dem Bund (21) befestigt ist.
  2. Druckregler nach Anspruch 1, gekennzeichnet durch eine Kupplung (17), die den Sitz (10) für den Kolben (7) bildet und in einen ersten Längsabschnitt (6a) des Auslaßlochs (6) eingepaßt ist.
  3. Druckregler nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß das Muffenelement (12) eine ringförmige Nut (18) aufweist, die eine Dichtung (19) aufnimmt, um den Sitz (13) am Verteiler (14) abzudichten.
EP19900109460 1989-05-26 1990-05-18 Druckregler für den Druck innerhalb der Brennstoffspeisesammelleitung einer Brennstoffspeisevorrichtung eines Verbrennungsmotors Expired - Lifetime EP0399402B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT5313089U 1989-05-26
IT5313089U IT217084Z2 (it) 1989-05-26 1989-05-26 Regolatore di pressione per la regolazione della pressione all internodi un collettore di alimentazione del carburante di un dispositivo dialimentazione del carburante di un motore a combustione interna

Publications (2)

Publication Number Publication Date
EP0399402A1 EP0399402A1 (de) 1990-11-28
EP0399402B1 true EP0399402B1 (de) 1993-07-28

Family

ID=11280193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900109460 Expired - Lifetime EP0399402B1 (de) 1989-05-26 1990-05-18 Druckregler für den Druck innerhalb der Brennstoffspeisesammelleitung einer Brennstoffspeisevorrichtung eines Verbrennungsmotors

Country Status (5)

Country Link
EP (1) EP0399402B1 (de)
BR (1) BR9002399A (de)
DE (1) DE69002390T2 (de)
ES (1) ES2052096T3 (de)
IT (1) IT217084Z2 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570600A (en) * 1982-09-29 1986-02-18 General Motors Corporation Fuel rail assembly and method of fabrication
JPS60108561A (ja) * 1983-11-15 1985-06-14 Nippon Denso Co Ltd 燃料分配管
DE3505625C2 (de) * 1985-02-19 1994-06-01 Bosch Gmbh Robert Kraftstoff-Druckregelvorrichtung
US4756289A (en) * 1986-02-12 1988-07-12 General Motors Corporation Self-contained fuel pressure regulator
IT208360Z2 (it) * 1986-11-18 1988-05-28 Weber Srl Gruppo per un collettore di carburante con regolatore di pressione integrato per alimentazione ad iniezione di motori a combustione interna

Also Published As

Publication number Publication date
BR9002399A (pt) 1991-08-06
ES2052096T3 (es) 1994-07-01
IT8953130V0 (it) 1989-05-26
DE69002390T2 (de) 1993-11-18
DE69002390D1 (de) 1993-09-02
IT217084Z2 (it) 1991-10-29
EP0399402A1 (de) 1990-11-28

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