EP1270925A2 - Dispositif de soupape pour commuter l'écoulement de retour d'une pompe à injection Diesel dépendant de la température - Google Patents

Dispositif de soupape pour commuter l'écoulement de retour d'une pompe à injection Diesel dépendant de la température Download PDF

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Publication number
EP1270925A2
EP1270925A2 EP02011013A EP02011013A EP1270925A2 EP 1270925 A2 EP1270925 A2 EP 1270925A2 EP 02011013 A EP02011013 A EP 02011013A EP 02011013 A EP02011013 A EP 02011013A EP 1270925 A2 EP1270925 A2 EP 1270925A2
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EP
European Patent Office
Prior art keywords
valve
valve device
housing
connection
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.)
Withdrawn
Application number
EP02011013A
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German (de)
English (en)
Other versions
EP1270925A3 (fr
Inventor
Julian De La Azuela
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 EP1270925A2 publication Critical patent/EP1270925A2/fr
Publication of EP1270925A3 publication Critical patent/EP1270925A3/fr
Withdrawn legal-status Critical Current

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    • 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 valve device temperature-dependent switching of the overflow quantity Diesel injection pump according to the preamble of the claim 1 specified genus.
  • Such a valve device is known from EP 0 145 986 B1 for temperature-dependent switching of the overflow volume a diesel injection pump to a fuel tank or Inlet side of the injection pump known.
  • Preheating valves are used in injection systems from Diesel engines to one hand on cold start faster warm-up of the injection pump Fuel while at the same time warm diesel engine overheating of the fuel should be avoided by returning it to the tank.
  • the previously known valve device works with a single Bimetallic snap disc, which is a single valve seat assigned. It will also shut off the Drain connection to the filter side in warm condition additional check valve used. With this design can at higher flow rates, such as that of newer Diesel injectors are often called for Flow resistance increases to an undesirable degree, especially since the resistance of the check valve can also be overcome must, so that the fuel supply is not yet optimal is working.
  • DE 34 27 396 A1 is a similar one Valve device for a temperature-dependent changeover the overflow amount of a diesel injection pump known with a single bimetallic snap disc as a control element works between two assigned valve seats. Because the hub the bimetallic disc is limited, the two lie valve seats to be shut off in the housing of the preheating valve in relatively close to each other, the Bimetal disc lies in between. This arrangement also has the disadvantage that they become one at larger flow rates leads to undesirably high flow resistance. Also does that the bimetallic disc is exposed Valve device susceptible to malfunctions in operation.
  • the valve device according to the invention temperature-dependent switching of the overflow quantity Diesel injection pump with the characteristic features of the Claim 1 has the advantage that they are Control of larger pressure medium flows with less Pressure drop is suitable. Because the valve device is larger Flow cross sections has and controls, can Pressure drop significantly during operation, even with large currents be reduced. In addition, the filter side Shut-off check valve is not necessary because of this function is now taken over by the control element itself. Overall builds the valve device with relatively few parts and thus simple and cheap.
  • FIG. 1 shows a simplified representation Longitudinal section through a valve device 10 for temperature-dependent switching of the overflow quantity Diesel injection pump to a fuel tank or Inlet side of the injection pump.
  • the valve device 10 has a two-part housing 11, which consists essentially of a cup-shaped housing part 12 and a cover part 13 consists.
  • At the cup-shaped housing part 12 are radially one Inlet connection 14 and a return connection 15 brought up, both as hose connection piece are trained and essentially opposite each other lie.
  • the overflow amount of is fed to an injection pump Return port 15 with a not shown Fuel tank in connection.
  • An outlet connection 16 is arranged coaxially in the cover part 13, from which the fuel on the inlet side of the Injection pump is guided, this drain port 16th mostly connected to the clean side of a filter.
  • the channels 17 and 19 from the inlet connection 14 and Drain connector 16 open inside the housing 11 in a annular chamber 21 in which as a control member Seat valve body 22 is arranged.
  • This poppet valve body 22 is cup-shaped and thus hollow, being Valve cone 23 with a first valve seat 24 cooperates, which is arranged in the cover part 13.
  • a second valve seat 25 is located above this first valve seat 24 opposite, on a housing-fixed pipe socket 26 in Housing part 12 is formed. That of the second annular Valve seat 25 opening formed with the channel 18 in Return port 15 in connection.
  • the cup-shaped seat valve body 22 instructs its open end has a circular edge 27 with the second valve seat 25 cooperates and thus the Pressure medium connection from the inlet port 14 to Return port 15 controls. Furthermore, is in the seat valve body 22 an axial, centrally arranged bolt 28 is fastened, which is guided in an abutment 29 fixed to the housing and thus also the guidance of the seat valve body 22 in the housing 11 takes over.
  • One between the pin 18 and the abutment 29 supporting spring 31 presses the seat valve body 22 with cold fuel flow into the drawn Starting position in which the seat valve body 22 with supports its edge 27 on the second valve seat 25 while doing so shuts off the connection to the return port 15.
  • Bimetallic discs 32 are arranged between the Support valve cone 23 and abutment 29.
  • This Bimetal discs 32 take the cold fuel drawn flat shape and are designed and arranged that at a temperature dependent Deformation of the bimetallic disks 32 and their individual strokes add.
  • valve device 10 The operation of the valve device 10 is as follows explained, the basic function of such Preheating valves is assumed to be known per se. Furthermore, the explanation of the mode of action also applies to the figure 2 referred, which is a switch position shows warm fuel flow and on Figure 3, the one Flow diagram as a function of temperature represents.
  • the Seat valve body 22 is the restoring force of Spring 31 from the working position shown in Figure 2 back to its rest position shown in FIG. 1 controlled back so that the pressure medium flow to Return port 15 shutdown and reinforced again in the Drain port 16 is controlled. From Figure 3 is included the hysteresis during reversal is particularly evident detect.
  • FIG. 4 shows another embodiment in FIG simplified representation of a second valve device 50, which differs from the first valve device 10 according to FIG. 1 differs as follows, being for the same components same reference numerals are used.
  • the second valve device 50 differs primarily in that, as the control member 51, a first (52) and a second (53) bimetallic disc.
  • the bimetal washers 52, 53 themselves take over the functions of actuation and the control of the flow cross-sections.
  • the bimetallic discs 52, 53 centrally on one Bolt 54 fixed to the housing, being carried by a Intermediate piece 55 are kept at a distance from each other. While the first bimetallic disc 52 with the first Valve seat 24 works together and thus the connection of the annular chamber 21 controls to the drain port 16, the second bimetallic disc 53 works with the second Valve seat 25 together and controls the connection to Return port 15.
  • the drain port 16 on the housing 11 is in turn as Plug connection formed so that the valve device 10th in a manner known per se in a filter housing can be plugged in so that the drain connection 16 flowing fuel flow on the clean side of the filter and thus get to the inlet side of the injection pump can.
  • the operation of the second valve device 50 is as follows explained, their basic switching function with that of the first valve device 10 according to FIG. 21 is comparable. Switching the fuel flow will now instead of by the seat valve body 22 according to FIG the second valve device 50 by the two Bimetallic discs 52 and 53 made. In order to explain this toggle function is also based on the schematic Representations in Figures 5 to 9 referenced.
  • FIG. 6 shows the case that the first bimetallic disc 52 in front of the second bimetallic disc 53 switches
  • FIG. 8 shows the other case, that the second bimetallic disc 53 before the first Bimetallic disc 52 jumps into its other position.
  • a switching process as in already shown and explained essentially in FIG. 3 is. While the warm bimetallic discs 52, 53 assume the switch positions shown in FIG. 9, is the valve device 50 as the temperature of the The fuel back into the switch position according to FIG. 5 deferred, again one of the switching variations 6 to 8 is run through. This occurs in comparable to the first valve device 10 a temperature-dependent hysteresis.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Temperature-Responsive Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
EP02011013A 2001-06-28 2002-05-17 Dispositif de soupape pour commuter l'écoulement de retour d'une pompe à injection Diesel dépendant de la température Withdrawn EP1270925A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001131202 DE10131202A1 (de) 2001-06-28 2001-06-28 Ventileinrichtung zur temperaturabhängigen Umschaltung der Überstömmenge einer Diesel-Einspritzpumpe
DE10131202 2001-06-28

Publications (2)

Publication Number Publication Date
EP1270925A2 true EP1270925A2 (fr) 2003-01-02
EP1270925A3 EP1270925A3 (fr) 2004-03-10

Family

ID=7689776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02011013A Withdrawn EP1270925A3 (fr) 2001-06-28 2002-05-17 Dispositif de soupape pour commuter l'écoulement de retour d'une pompe à injection Diesel dépendant de la température

Country Status (2)

Country Link
EP (1) EP1270925A3 (fr)
DE (1) DE10131202A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1754881A3 (fr) * 2005-07-06 2007-11-21 Kyosan Denki Co., Ltd. Soupape de recirculation
DE102009043072A1 (de) * 2009-09-25 2011-03-31 Volkswagen Ag Verfahren zum Betreiben einer Brennkraftmaschine
EP2402586A1 (fr) * 2009-02-24 2012-01-04 Zertan, S.A. Valve thermostatique pour circuits de combustible
DE10322197B4 (de) * 2003-05-16 2013-06-13 Volkswagen Ag Vorrichtung zur Kraftstoffzuführung
CN103967669A (zh) * 2013-02-06 2014-08-06 瓦锡兰瑞士公司 设备，尤其是大型柴油发动机的泵设备，及其清洁方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103824A (en) * 1974-07-25 1978-08-01 Seifert Gerd W Thermostat for coolant presented as switch specifically for combustion engines
DE3427396A1 (de) 1984-07-25 1986-01-30 Helphos Gmbh, 3388 Bad Harzburg Vorrichtung zum einbau in die zufuehrungs- und rueckfuehrungsleitung des kraftstoffes zu bzw. von dieselmotoren
EP0145986B1 (fr) 1983-12-15 1988-03-09 Robert Bosch Gmbh Dispositif servant à la déviation, en fonction de la témperature, du reflux d'une pompe a injection diesel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4435626A1 (de) * 1994-10-05 1996-04-11 Knecht Filterwerke Gmbh Vorrichtung zur Kraftstoffvorwärmung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103824A (en) * 1974-07-25 1978-08-01 Seifert Gerd W Thermostat for coolant presented as switch specifically for combustion engines
EP0145986B1 (fr) 1983-12-15 1988-03-09 Robert Bosch Gmbh Dispositif servant à la déviation, en fonction de la témperature, du reflux d'une pompe a injection diesel
DE3427396A1 (de) 1984-07-25 1986-01-30 Helphos Gmbh, 3388 Bad Harzburg Vorrichtung zum einbau in die zufuehrungs- und rueckfuehrungsleitung des kraftstoffes zu bzw. von dieselmotoren

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10322197B4 (de) * 2003-05-16 2013-06-13 Volkswagen Ag Vorrichtung zur Kraftstoffzuführung
EP1754881A3 (fr) * 2005-07-06 2007-11-21 Kyosan Denki Co., Ltd. Soupape de recirculation
US7971849B2 (en) 2005-07-06 2011-07-05 Kyosan Denki Co., Ltd. Recirculating valve
CN1892015B (zh) * 2005-07-06 2011-12-14 京三电机株式会社 回流阀
EP2402586A1 (fr) * 2009-02-24 2012-01-04 Zertan, S.A. Valve thermostatique pour circuits de combustible
EP2402586A4 (fr) * 2009-02-24 2013-11-20 Zertan Sa Valve thermostatique pour circuits de combustible
DE102009043072A1 (de) * 2009-09-25 2011-03-31 Volkswagen Ag Verfahren zum Betreiben einer Brennkraftmaschine
CN103967669A (zh) * 2013-02-06 2014-08-06 瓦锡兰瑞士公司 设备，尤其是大型柴油发动机的泵设备，及其清洁方法
EP2765302A1 (fr) * 2013-02-06 2014-08-13 Wärtsilä Schweiz AG Dispositif, en particulier dispositif de pompe pour un grand moteur diesel, et procédé de nettoyage d'un dispositif

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Publication number Publication date
DE10131202A1 (de) 2003-01-09
EP1270925A3 (fr) 2004-03-10

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