EP0916839B1 - Système d'alimentation en carburant pour moteur diesel - Google Patents

Système d'alimentation en carburant pour moteur diesel Download PDF

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Publication number
EP0916839B1
EP0916839B1 EP98119891A EP98119891A EP0916839B1 EP 0916839 B1 EP0916839 B1 EP 0916839B1 EP 98119891 A EP98119891 A EP 98119891A EP 98119891 A EP98119891 A EP 98119891A EP 0916839 B1 EP0916839 B1 EP 0916839B1
Authority
EP
European Patent Office
Prior art keywords
fuel
filter
supply system
fuel supply
bypass line
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
EP98119891A
Other languages
German (de)
English (en)
Other versions
EP0916839A2 (fr
EP0916839A3 (fr
Inventor
Holger Wehner
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0916839A2 publication Critical patent/EP0916839A2/fr
Publication of EP0916839A3 publication Critical patent/EP0916839A3/fr
Application granted granted Critical
Publication of EP0916839B1 publication Critical patent/EP0916839B1/fr
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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0035—Thermo sensitive valves
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators

Definitions

  • the invention relates to a fuel supply system for a diesel engine with a fuel from one Swirl pot of a fuel tank to the diesel engine promotional fuel pump, with one from an injection rail and / or a high pressure pump of the diesel engine return line led into the fuel tank and with a fuel filter arranged in front of the fuel pump.
  • Such fuel supply systems are used in today's Diesel engines are widely used and are from practice known.
  • the one from the diesel engine via the return line backflowing fuel has a high temperature and is usually fed to a suction jet pump, the fuel promotes from the fuel tank into the baffle.
  • the fuel delivered into the surge pot points therefore a temperature that is between the temperature in the return line and in the fuel tank lies.
  • the Diesel fuel precipitated solid paraffins the fuel filter add, and after some time by the in the Swirl pot of warm fuel flowing.
  • Fuel filter for today's diesel engines where the However, fuel is injected directly into cylinders particularly close-knit to ensure that the fuel is as thoroughly as possible clean.
  • the fuel filter of the known Fuel supply system at very low temperatures Add paraffins very quickly before the fuel in the baffle reaches a temperature that the paraffins melts.
  • the invention is based on the problem of a fuel supply system to be designed so that clogging of the fuel filter is largely avoided with paraffins.
  • the hot, from the return line returned fuel is fed directly to the fuel filter.
  • the filter element of the fuel filter is thanks to the Invention warmed up from the side of the fuel pump. This leads to a particularly rapid heating up of the fuel filter after the start of the internal combustion engine. That is why paraffins melted immediately after their formation and therefore no longer clog the fuel filter.
  • the fuel pump reliably with a minimum amount of warm Fuel supplied.
  • the bypass line opens seen in the flow direction after a filter element arranged of the fuel filter and / or the fine filter Swirling.
  • the over the bypass line in the Fuel filter flowing fuel is already cleaned, so that these are fed directly to the fuel pump can.
  • This design means that the fuel filter intake volume flow kept particularly low.
  • Fuel flowing back via the return line can be simply into the intended partial flows for the bypass line and for divide the suction jet pump if there is one in the bypass line Throttle is arranged.
  • This choke can be used, for example Cross-sectional narrowing of the bypass line can be designed. hereby can ensure that the baffle at all times is filled with fuel.
  • Constant heating of the fuel by connecting the Bypass line in front of the fuel pump leaves according to another advantageous development of the Avoid invention if the bypass line above a provided temperature can be closed by a valve is. This will create gas bubbles at very high Fuel temperatures can arise reliably avoided.
  • the fuel flowing back through the return line can be according to another advantageous development of the invention completely for heating the fuel filter use when seen in the flow direction arranged after a branch of the bypass line Section of the return line below an intended one Temperature can be closed by a valve.
  • valve could be switched electrically, for example become.
  • the valve requires another advantageous development of the invention a particularly little construction effort if it is one of a spring element pretensioned closing element and an actuator with a wax filling for adjustment of the closing member.
  • the wax filling stretches rising temperature and shifts that Closing member. When the temperature drops, the closing member moved back from the spring element into the basic position.
  • the valve is designed according to another advantageous one Further development of the invention is particularly cost-effective, if the valve is an actuator with a metal memory alloy Has.
  • the fuel supply system according to the invention is special easy to install if the fine filter with a the fuel pump has a structural unit Unity forms.
  • This design can be all connections for the fine filter and the bypass line arrange inside the fuel tank, see above that fuel diffusion losses are particularly low being held.
  • the bypass line can be according to another advantageous one Further development of the invention directly at the Connect high pressure pump and in a particularly short way lead to the fine filter if the fine filter with the High pressure pump forms a structural unit. This carries for a particularly short heating-up time of the fine filter at.
  • FIG. 1 shows schematically an inventive Fuel supply system with one in a fuel tank 1 arranged conveyor unit 2 and one Injection strip 3 of a diesel engine.
  • the conveyor unit 2 has a fuel pump arranged in a surge pot 4 5 and a fuel filter 6 with a filter element 7.
  • the fuel pump 5 delivers fuel over a flow line 8 to a high pressure pump 9.
  • a pressure control valve 10 arranged, which is provided above a Pressure opens and excess fuel over a return line 11 leads back into the fuel tank 1.
  • a fine filter 12 In front of the high pressure pump 9 is a fine filter 12 with a mesh size of, for example, 5 ⁇ m Filter element 13 arranged.
  • the return line 11 has two valves 14, 15, each via one Bypass line 16, 17 with the fine filter 12 and the fuel filter 6 are connected.
  • the fuel that over the return line 11 enters the fuel tank 1, is fed to a suction jet pump 18 which Sucks fuel from the fuel tank 1 and in promotes the surge pot 4.
  • a partial flow occurs at particularly low temperatures of the hot fuel from the return line 11 via the bypass lines 16, 17 to the fine filter 12 and the fuel filter 6.
  • the bypass lines 16, 17 are viewed in the flow direction after the filter elements 7, 13 arranged swirling spaces 19, 20 fed.
  • FIG. 2 shows an embodiment of one of the valves 14, 15 from Figure 1 in a longitudinal section.
  • the valve 14, 15 has one arranged in the bypass line 16, 17 Locking member 21, which from a spring element 22 in the drawn basic position is biased.
  • the bypass line 16, 17 is at opened at low temperature and is opened at high temperature locked.
  • the flows of the fuel are shown with arrows.
  • FIG. 3 shows a further embodiment of one of the Valves 14, 15 from FIG. 1, in which a closing element 24 is designed to block the return line 11.
  • the closing element 24 is also supported by an actuating element 25 a metal memory alloy.
  • the closing member 24 at low temperature shown in which there is a to that shown in Figure 1 Fuel tank 1 leading section of the return line 11 closes and via a bore 26 Fuel can get into the bypass line 16, 17.
  • the closing member is above a specified temperature 24 moved to the left so that fuel in the Figure 1 shown fuel tank 1 and in the Bypass line 16, 17 can reach.
  • FIG. 4 shows one of an actuating element 27 with a Metal memory alloy adjustable locking member 28.
  • the closing member 28 like that in FIG. 2, serves for closing the bypass line 16, 17 at high temperatures.
  • FIG. 5 shows one arranged in the bypass line 16, 17 Throttle 29, which instead of that shown in Figure 1 Valves 14, 15 in the fuel supply position can be used.
  • the throttle 29 is a cross-sectional constriction designed in the bypass line 16, 17 and enables a constant branching of a partial flow from the return line 11 into the bypass line 16, 17.

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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)
  • Processes For Solid Components From Exhaust (AREA)

Claims (10)

  1. Installation d'alimentation en carburant pour un moteur diesel, avec une pompe à carburant (5) qui transporte le carburant provenant d'une cuve d'équilibrage (4) d'un réservoir à carburant (1) vers ce moteur diesel, un conduit de retour (11) qui relie un rail d'injection (3) et/ou une pompe à haute pression du moteur diesel au réservoir de carburant (1), un filtre à carburant (6, 12) disposé en amont de la pompe à carburant et un conduit de dérivation (16, 17) qui relie le conduit de retour (11) et le filtre à carburant (6, 12), caractérisée en ce que le conduit de dérivation (16, 17) débouche dans le filtre à carburant (6, 12) en aval d'un élément de filtre (7, 13) dans la direction d'écoulement et est configuré pour réchauffer l'élément de filtre (7, 13) de ce côté.
  2. Installation d'alimentation en carburant selon la revendication 1, caractérisée par un conduit de dérivation (17) qui relie le conduit de retour (11) et par un filtre fin (12) disposé en amont de la pompe à haute pression (9).
  3. Installation d'alimentation en carburant selon la revendication 1 ou 2, caractérisée en ce que le conduit de dérivation (16, 17) débouche dans une chambre de tourbillonnage (19, 20) disposée en aval d'un élément de filtre (7, 13) du filtre à carburant (6) et/ou du filtre fin (12) dans la direction d'écoulement.
  4. Installation d'alimentation en carburant selon au moins l'une des revendications précédentes, caractérisée en ce qu'un étranglement (29) est disposé dans le conduit de dérivation (16, 17).
  5. Installation d'alimentation en carburant selon au moins l'une des revendications précédentes, caractérisée en ce qu'au-dessus d'une température prédéterminée, le conduit de dérivation (16, 17) peut être fermé par une soupape (14, 15).
  6. Installation d'alimentation en carburant selon au moins l'une des revendications précédentes, caractérisée en ce qu'en dessous d'une température prédéterminée, une partie du conduit de retour (11) disposée en aval dans la direction d'écoulement d'un raccordement au conduit de dérivation (16, 17) peut être fermée par une soupape (14, 15).
  7. Installation d'alimentation en carburant selon au moins l'une des revendications précédentes, caractérisée en ce que la soupape (14, 15) possède un organe de fermeture (21) sollicité dans sa position de base par un élément à ressort (22) et un élément d'activation (23) rempli de cire pour déplacer l'organe de fermeture (21).
  8. Installation d'alimentation en carburant selon au moins l'une des revendications précédentes, caractérisée en ce que la soupape (14, 15) possède un élément d'activation (25, 27) à alliage métallique à mémoire.
  9. Installation d'alimentation en carburant selon au moins l'une des revendications précédentes, caractérisée en ce que le filtre fin (12) forme un module intégré à une unité d'alimentation (2) qui présente la pompe à carburant (5).
  10. Installation d'alimentation en carburant selon au moins l'une des revendications précédentes, caractérisée en ce que le filtre fin (12) forme un module intégré à la pompe à haute pression (9).
EP98119891A 1997-11-15 1998-10-21 Système d'alimentation en carburant pour moteur diesel Expired - Lifetime EP0916839B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19750680 1997-11-15
DE19750680A DE19750680C2 (de) 1997-11-15 1997-11-15 Kraftstoffversorgungsanlage für einen Dieselmotor

Publications (3)

Publication Number Publication Date
EP0916839A2 EP0916839A2 (fr) 1999-05-19
EP0916839A3 EP0916839A3 (fr) 2000-03-08
EP0916839B1 true EP0916839B1 (fr) 2003-08-06

Family

ID=7848850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98119891A Expired - Lifetime EP0916839B1 (fr) 1997-11-15 1998-10-21 Système d'alimentation en carburant pour moteur diesel

Country Status (2)

Country Link
EP (1) EP0916839B1 (fr)
DE (2) DE19750680C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101676547B (zh) * 2008-09-15 2012-08-15 通用汽车环球科技运作公司 防堵塞燃料泵模块

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19929986C2 (de) * 1999-06-30 2002-11-21 Alfmeier Praez Ag Kraftstoffentnahmevorrichtung für Kraftfahrzeuge
GB0205965D0 (en) 2002-03-14 2002-04-24 Delphi Tech Inc Fuel system
ATE450707T1 (de) 2006-06-27 2009-12-15 Georg Gruber Dieselmotorisch betriebene brennkraftmaschine
DE102009052601B4 (de) 2009-11-10 2022-07-07 Daimler Truck AG Kraftstoffeinspritzanlage
US9776507B2 (en) 2010-12-14 2017-10-03 GM Global Technology Operations LLC Temperature based fuel management in a vehicle fuel system
DE102017007603A1 (de) * 2017-08-11 2019-02-14 Hydac Fluidcarecenter Gmbh Fördervorrichtung für den Kraftstoff einer Verbrennungs-Kraftmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2841768A1 (de) * 1978-09-26 1980-04-10 Bosch Gmbh Robert Einrichtung zum filtrieren von kraftstoff fuer dieselmotoren
JPS60164657A (ja) * 1984-02-04 1985-08-27 Nissan Motor Co Ltd デイ−ゼルエンジン用燃料フイルタ装置
DE3422979A1 (de) * 1984-06-22 1986-01-02 Robert Bosch Gmbh, 7000 Stuttgart Filter fuer dieselkraftstoff
GB2259587A (en) * 1991-09-11 1993-03-17 Ford Motor Co Engine fuel supply
FR2746784B1 (fr) * 1996-03-27 1998-05-22 Bitron France Dispositif de pompage immerge dans un reservoir pour vehicule automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101676547B (zh) * 2008-09-15 2012-08-15 通用汽车环球科技运作公司 防堵塞燃料泵模块

Also Published As

Publication number Publication date
EP0916839A2 (fr) 1999-05-19
DE59809196D1 (de) 2003-09-11
DE19750680A1 (de) 1999-06-02
DE19750680C2 (de) 1999-11-18
EP0916839A3 (fr) 2000-03-08

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