EP1645803B1 - Procédé de démarrage d'un appareil de chauffage, en particulier d'un appareil de chauffage pour véhicules - Google Patents

Procédé de démarrage d'un appareil de chauffage, en particulier d'un appareil de chauffage pour véhicules Download PDF

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Publication number
EP1645803B1
EP1645803B1 EP05020512.9A EP05020512A EP1645803B1 EP 1645803 B1 EP1645803 B1 EP 1645803B1 EP 05020512 A EP05020512 A EP 05020512A EP 1645803 B1 EP1645803 B1 EP 1645803B1
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EP
European Patent Office
Prior art keywords
ignition
phase
fuel
heater
started
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 - Fee Related
Application number
EP05020512.9A
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German (de)
English (en)
Other versions
EP1645803A2 (fr
EP1645803A3 (fr
Inventor
Oliver Schmidt
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.)
Eberspaecher Climate Control Systems GmbH and Co KG
Original Assignee
Eberspaecher Climate Control Systems GmbH and Co KG
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Publication date
Application filed by Eberspaecher Climate Control Systems GmbH and Co KG filed Critical Eberspaecher Climate Control Systems GmbH and Co KG
Priority to PL05020512T priority Critical patent/PL1645803T3/pl
Publication of EP1645803A2 publication Critical patent/EP1645803A2/fr
Publication of EP1645803A3 publication Critical patent/EP1645803A3/fr
Application granted granted Critical
Publication of EP1645803B1 publication Critical patent/EP1645803B1/fr
Expired - Fee Related legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/002—Regulating fuel supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/02—Starting or ignition cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/14—Vehicle heating, the heat being derived otherwise than from the propulsion plant

Definitions

  • the present invention relates to a method for starting a heater, in particular vehicle heater.
  • Such heaters used for example as auxiliary heaters or auxiliary heaters in motor vehicles are particularly critical in the starting phase in terms of pollutant emissions. Therefore, there is generally a desire to keep this starting phase as short as possible.
  • delivery rate is used here to refer to the quantity of fuel fed in per unit time, which could also be referred to as the fuel flow.
  • This fuel mixes with the naturally supplied combustion air in parallel, so that an ignitable mixture is formed, which is ignited in ideal circumstances within a few seconds. Since the fuel feed is generally time-controlled in known heaters, that is, this maximum amount of fuel is fed for a predetermined time, before then transferred to normal operation, but there is a problem that in the case where the provided mixture does not ignite, a excessive fuel accumulation is generated in the area of the heater. The consequence of this may be that liquid fuel from the heater or a combustion chamber of the same runs out or liquid fuel is ejected via the exhaust system in a subsequent restart attempt.
  • the DE 100 50 611 C1 discloses a method for starting a fuel-operated vehicle heater, wherein in the event that in a first ignition phase, the occurrence of a flame is not detected, is started after a first ignition phase subsequent rinse phase with a second ignition phase.
  • a first ignition phase a comparatively large fuel delivery rate is started and gradually reduced, while in the second ignition phase beginning after the purge phase, a comparatively small fuel delivery stage is started and gradually increased.
  • the DE 198 20 192 A1 discloses a method for igniting a gas-fired burner, in which, if after a predetermined period of gas supply, the occurrence of a flame has not been detected, the gas supply is interrupted and in a subsequent ignition phase after a time interval in which the gas delivery remains adjusted trying again to start the combustion.
  • the DE 43 23 221 C1 discloses a method for starting a fuel-fired heater, in which, when in a first ignition phase, the occurrence of a flame is not detected, then blown in a subsequent free-blowing phase of existing in a combustion chamber fuel, whereupon in a subsequent second ignition phase attempting to start the combustion by taking up the fuel delivery again.
  • the JP 02 044122 A discloses a method of starting a burner in which, when the start of a flame is detected in the starting phase, the opening of a fuel supply adjusting proportional valve is changed from the slow ignition opening and this state is maintained for a predetermined period of time ,
  • this object is achieved by a method for starting a heater, in particular vehicle heater, in which method in a first ignition phase fuel is fed with a first Zünd-flow rate in the heater and then if detected before the expiration of a maximum period of the first ignition no ignition is, from the first ignition phase, a second ignition phase is entered, in which fuel is fed with a second ignition delivery in the heater, which is smaller than the first ignition delivery.
  • a stabilization phase is started in which fuel is fed with a stabilizing flow rate in the heater, and then, if before the expiration of the maximum time the first firing phase no ignition is detected, the second firing phase is started, in which fuel is fed to the second Zünd-flow rate in the heater, which second firing rate is less than the first firing rate and as the stabilizing flow rate.
  • the ignition takes place, so the fuel / air mixture has started to burn. If this is the case, ie if there is a correct, fast starting process, then in a subsequent stabilization phase the flame is given the opportunity to spread further and to switch to a stable combustion state. However, if it is detected that there is no correct ignition, ie the fuel / air mixture has not started to burn, then a second ignition phase is entered, in which an attempt is still made to start the combustion, but with reduced fuel supply. In this way, a supersaturation of the heater with fuel in the Starting phase can be avoided. This not only reduces the risk of leaking liquid fuel from a heater, but also leads to more favorable conditions, in the event that a start attempt must be terminated unsuccessfully and a new start attempt must be started.
  • the stabilization phase is started.
  • the stabilization flow rate fed into the heater during the stabilization phase can essentially correspond to the first ignition flow rate introduced in the first ignition phase. Furthermore, it is proposed that the first ignition delivery amount corresponds to the maximum delivery quantity. This means that in the first ignition phase, a fuel is operated in the heater or a combustion chamber of the same feeding system with maximum capacity.
  • the first ignition phase is started after a combustion chamber pre-conditioning phase has elapsed.
  • This generally designated 10 heater has a combustion chamber housing 12 in which a combustion chamber 14 is formed. Into this combustion chamber 14, the fuel required for the combustion is fed via a fuel feed pump 16. Further, a Combustion air blower 18 is provided, which feeds the air required for mixture formation in the combustion chamber 14.
  • a porous evaporator medium 20 is provided in the combustion chamber housing 12, for example in a region near the bottom thereof.
  • This porous evaporator medium 20 receives the initially liquid fuel, distributes it in its volume range, in particular under Kapillarré Quass, and gives the fuel in a vaporous configuration at its combustion chamber 14 side facing in this.
  • the porous evaporator medium 20 may be associated with an electrically operable heater 22 which, by increasing the temperature in the region of the porous evaporator medium 20, especially in the starting phase, ensures faster and more intense fuel evaporation.
  • an ignition device 24 for example a Glühzündux provided in the region of the combustion chamber 14.
  • a flame detection element 26 is provided, which can detect whether an ignition has taken place in the combustion chamber 14, that is, the combustion has started and thus a flame has occurred.
  • This flame detection element 26 can detect optically, but can also detect the temperature present in the region of the combustion chamber 14 or the combustion chamber housing 12, which of course also allows a conclusion as to whether an ignition has taken place and thus combustion has been started or not ,
  • the heater 10 is further associated with a drive device 28. This controls the operation of the various system components of the heater 10. Thus, this controls the fuel pump 16, as well as the combustion air blower 18 to initiate the required amount of combustion air and fuel to the combustion chamber 14 at the required time. Also the electrically energizable heater 22 and the ignition member 24 are under the control of the drive device 26. At the same time receives these inputs, for example, the detection signal of the flame detection element 26th
  • heater 10 only by way of example stands for a variety of different possible variations. It is understood that in various areas of this heater 10, the structure may be different than shown. However, it is important for the present invention that there are system areas which can initiate combustion air and fuel following combustion in a combustion chamber, which can generate the thermal conditions required for ignition, and which permit a conclusion as to whether ignition has taken place or not Combustion is present or not.
  • a start command for example, following a control program or by manually entering a user
  • the thermal conditions required for successfully starting the heater 10 are generated in the region of the heater 10, in particular the combustion chamber 14.
  • the electrically energizable heating device 22 can also be operated in order to preheat the porous evaporator medium 20 and the region of the combustion chamber 14 or the combustion chamber housing 12 surrounding it.
  • t v a fixed period of time may be predetermined, wherein This fixed period of time may also depend on external conditions such.
  • a first ignition phase t Z1 is then started. From the beginning of this first ignition phase, fuel is directed toward the combustion chamber 14 by corresponding activation of the fuel pump 16, ie, in the case illustrated, it is introduced into the porous evaporator medium 20 and then vaporized in the direction of the combustion chamber 14.
  • the fuel pump 16 can be operated in this first ignition phase t Z1 so that the first ignition delivery quantity fed in this phase corresponds to a maximum possible delivery quantity m max .
  • combustion air is also conveyed in the direction of the combustion chamber 14 parallel to the fuel feed. This combustion air feed can for example also be started during the conditioning phase t v .
  • the ignition should take place even before the expiration of a maximum possible period of time t Z1 'of the first ignition phase t Z1 , which should lead to a corresponding output of the flame detection element 26.
  • this ignition takes place at time 2.
  • the first ignition phase t Z1 is completed.
  • 2 is then entered into a stabilization phase t s at this time.
  • fuel is conveyed with a stabilizing flow rate in the direction of the combustion chamber 14.
  • This stabilizing flow rate may correspond, for example, to the first ignition flow. That is, even in the stabilization phase t s , the fuel pump 16 can be controlled so that it operates at maximum flow rate m max .
  • this stabilization phase t s in case of Fig. 1 So at time 3, then is transferred to the normal combustion mode, which means that fuel is fed with a flow rate m betr toward the combustion chamber 14.
  • a corresponding adjustment of the flow rate of the combustion air blower 18 can be made in order to provide the ideal fuel / air ratio for the then running combustion can.
  • Fig. 2 the case is shown in which, even after the expiration of the maximum duration t Zt1 'of the first ignition phase t Z1, the occurrence of an ignition could not yet be detected. That is, at the time 2, which is the duration t Z1 'after the time 1, there is no combustion.
  • a second ignition phase t Z2 is then entered in this case.
  • fuel is passed with a second ignition delivery in the direction of the combustion chamber 14, which corresponds to a delivery rate m min in the example shown.
  • This second ignition delivery is smaller than the first ignition delivery and is also smaller than the stabilization delivery, which corresponds to the first ignition delivery in the example shown.
  • the occurrence of the ignition and thus the start of combustion are signaled at time 3 and even before the expiry of a maximum possible time period t Z2 'of the second ignition phase t Z2 by a corresponding sensor signal of the flame detection element 26 of the control device 28.
  • the second ignition phase t Z2 is then terminated and the stabilization phase t s , which then follows this second ignition phase t Z2, is entered.
  • fuel with the stabilizing flow rate is then fed back into the combustion chamber 14 in order to ensure the fastest possible spread and thus also to support combustion stabilization in the combustion chamber 14.
  • the stabilization phase t s corresponds to that which occurs in the Fig. 1 illustrated sequence is present, ie in the case in which the entry into the second ignition phase t Z2 was not required.
  • m max flow rate
  • the normal combustion mode is then transferred and fuel with the delivery amount m betr is conveyed.
  • this provided for the normal combustion plant flow rate m betr is greater than the provided in the start phase for the second ignition phase t Z2 second ignition flow rate m min .
  • this does not have to be the case.
  • the in the in Fig. 2 Of course, the flow rate to be used at the time of subsequent normal operating phase will depend on which heating power has to be provided.
  • Fig. 3 the case is shown in which when performing the start procedure according to the invention after the completion of the first ignition phase t 1 with the time t Z1 'and also the complete expiry of the second ignition phase t Z2 with their maximum time t Z2 ' the occurrence of the ignition is not yet could be recognized.
  • the fuel supply is then completely terminated according to the invention with the end of the second ignition phase t z2 , that is to say at time 2. That is to say, the two ignition phases t Z1 and t Z2 , together with their respective maximum time periods t Z1 'and t Z2 ', together define a safety time interval starting at the beginning of the fuel feed in at time 1.
  • the stabilization phase is followed, the flame is given in each case, the possibility under suitable conditions then spread as quickly as possible and stabilize. It has also been found that with respect to the total duration of the two ignition phases in the procedure according to the invention with lowering the fuel supply in the second ignition phase, the probability of a successful ignition is higher than in the case in which over these two phases or corresponding time period maximum possible Amount is encouraged.
  • the entry into the stabilization phase t s be dispensed with and instead be transferred directly into the normal combustion mode.
  • the reason for this may be that a comparatively large amount of fuel is introduced into the combustion chamber immediately before the ignition occurs, which can then be burned on entry into the normal combustion mode with reduced fuel feed and thus contributes to flame stabilization.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Air-Conditioning For Vehicles (AREA)

Claims (7)

  1. Une procédure pour démarrer un dispositif de chauffage, en particulier un dispositif de chauffage pour un véhicule, la procédure comprenant durant une première phase d'allumage (tz1) l'introduction d'un premier volume d'allumage (mmax) de carburant dans le dispositif de chauffage et puis, si l'allumage n'est pas détecté avant la fin d'une durée maximale (tz1') de ladite phase d'allumage (tz1), la transition de la première phase d'allumage à une deuxième phase d'allumage (tz2), pendant laquelle un deuxième volume d'allumage (mmin) est introduit dans le dispositif de chauffage, ce dernier étant plus petit que le premier volume d'allumage (mmax).
  2. La procédure selon la revendication 1, caractérisée en ce que
    - si l'allumage est détecté avant l'expiration d'une durée maximale (tz1') de la première phase d'allumage (tz1), une phase de stabilisation (ts) est entamée, pendant laquelle un volume de stabilisation (mmax) de carburant est introduit dans le dispositif de chauffage,
    - si aucun allumage est détecté avant l'expiration d'une durée maximale (tz1') de la première phase d'allumage (tz1), il y a une transition de la première phase d'allumage à cette deuxième phase d'allumage (tz2), où un deuxième volume d'allumage (mmin) de carburant est introduit dans le dispositif de chauffage, ce deuxième volume d'allumage (mmin) étant plus petit que ce premier volume d'allumage (mmax) et ce volume de stabilisation (mmax).
  3. La procédure selon la revendication 2,
    caractérisée en ce que la phase de stabilisation (ts) est entamée dès que l'allumage est détecté avec la deuxième phase d'allumage (tz2) étant entamée et avant l'expiration d'une durée maximale (tz2') de la deuxième phase d'allumage (tz2).
  4. La procédure selon la revendication 2 ou 3,
    caractérisée en ce que l'approvisionnement en carburant sera terminé quand il n'y a pas d'allumage détecté avec la deuxième phase d'allumage (tz2) étant entamée et avant l'expiration d'une durée maximale (tz2') de la deuxième phase d'allumage (tz2).
  5. La procédure selon une des revendications 2 à 4,
    caractérisée en ce que le volume de stabilisation (mmax) correspond essentiellement à ce premier volume d'allumage (mmax).
  6. La procédure selon une des revendications 1 à 5,
    caractérisée en ce que ce premier volume d'allumage (mmax) correspond essentiellement à un volume maximal.
  7. La procédure selon une des revendications 1 à 6,
    caractérisée en ce que cette première phase d'allumage (tz1) est entamée après l'expiration d'une phase de préconditionnement de la chambre de combustion (tv).
EP05020512.9A 2004-10-05 2005-09-20 Procédé de démarrage d'un appareil de chauffage, en particulier d'un appareil de chauffage pour véhicules Expired - Fee Related EP1645803B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05020512T PL1645803T3 (pl) 2004-10-05 2005-09-20 Sposób uruchamiania przyrządu grzejnego, zwłaszcza przyrządu grzejnego pojazdu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004048482A DE102004048482A1 (de) 2004-10-05 2004-10-05 Verfahren zum Starten eines Heizgerätes, insbesondere Fahrzeugheizgerätes

Publications (3)

Publication Number Publication Date
EP1645803A2 EP1645803A2 (fr) 2006-04-12
EP1645803A3 EP1645803A3 (fr) 2008-10-22
EP1645803B1 true EP1645803B1 (fr) 2013-08-14

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EP05020512.9A Expired - Fee Related EP1645803B1 (fr) 2004-10-05 2005-09-20 Procédé de démarrage d'un appareil de chauffage, en particulier d'un appareil de chauffage pour véhicules

Country Status (3)

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EP (1) EP1645803B1 (fr)
DE (1) DE102004048482A1 (fr)
PL (1) PL1645803T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008008895B4 (de) * 2008-02-13 2017-11-09 Eberspächer Climate Control Systems GmbH & Co. KG Verfahren zum Wiederholstart des Brennbetriebs in einem brennstoffbetriebenen Heizgerät
DE102012216826B4 (de) * 2012-09-19 2018-09-20 Webasto SE Heizsystem und Verfahren zur automatischen Leitungsbefüllung
DE102020133955A1 (de) 2020-12-17 2022-06-23 Vaillant Gmbh Verfahren und Vorrichtung zum Schutz eines Heizgerätes beim Zünden eines Gemisches aus Luft und wasserstoffhaltigem Brenngas
DE102022124819A1 (de) 2022-09-27 2024-03-28 Vaillant Gmbh Verfahren zum sicheren Zünden eines Wasserstoff-Luft-Gemischs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8620960D0 (en) * 1986-08-29 1986-10-08 Baxi Partnership Ltd Control circuit
JPH0244122A (ja) * 1988-08-03 1990-02-14 Rinnai Corp 燃焼制御装置
DE4323221C1 (de) * 1993-07-12 1994-12-15 Webasto Thermosysteme Gmbh Verfahren zum Starten eines brennerbetriebenen Heizgerätes
DE19507556B4 (de) * 1994-10-20 2004-12-30 J. Eberspächer GmbH & Co. KG Verfahren zum Starten eines Brenners für ein Fahrzeugheizgerät oder einen Partikelfilter-Regenerator
AT406514B (de) * 1997-04-28 2000-06-26 Vaillant Gmbh Verfahren zur zündung eines gasbeheizten brenners
DE10050611C1 (de) * 2000-10-13 2002-05-23 Webasto Thermosysteme Gmbh Verfahren zum Starten einer Fahrzeug-Zusatz- oder Standheizung

Also Published As

Publication number Publication date
PL1645803T3 (pl) 2014-01-31
EP1645803A2 (fr) 2006-04-12
DE102004048482A1 (de) 2006-04-13
EP1645803A3 (fr) 2008-10-22

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