EP0752558A2 - Commande de l'allumage d'un brûleur à évaporisation - Google Patents

Commande de l'allumage d'un brûleur à évaporisation Download PDF

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Publication number
EP0752558A2
EP0752558A2 EP96110643A EP96110643A EP0752558A2 EP 0752558 A2 EP0752558 A2 EP 0752558A2 EP 96110643 A EP96110643 A EP 96110643A EP 96110643 A EP96110643 A EP 96110643A EP 0752558 A2 EP0752558 A2 EP 0752558A2
Authority
EP
European Patent Office
Prior art keywords
glow plug
fuel
fan
switched
control according
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Withdrawn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
EP96110643A
Other languages
German (de)
English (en)
Other versions
EP0752558A3 (fr
Inventor
Wolfgang Pfister
Milan Leuze
Dieter Götz
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
J Eberspaecher GmbH and Co KG
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 J Eberspaecher GmbH and Co KG filed Critical J Eberspaecher GmbH and Co KG
Publication of EP0752558A2 publication Critical patent/EP0752558A2/fr
Publication of EP0752558A3 publication Critical patent/EP0752558A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F23N2227/00—Ignition or checking
    • F23N2227/04—Prepurge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/42—Ceramic glow ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2233/00—Ventilators
    • F23N2233/06—Ventilators at the air intake
    • F23N2233/08—Ventilators at the air intake with variable speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/14—Controlling burners with gasification or vaporizer elements
    • 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 invention relates to a control of the ignition of an evaporation burner of a heater, in particular for the interior heating of a motor vehicle, with a regulatable or controllable fan for combustion air and a glow plug for preheating the evaporator, which is ventilated by the fan during preheating to remove any fuel residues or vapors .
  • the blower is initially controlled for high output in the ignition phase.
  • the glow plug heats up the evaporator.
  • fuel is then introduced into the evaporator with the blower still running at high power and ignited there due to the high temperature of the evaporator which has now been reached.
  • the glow plug can then be switched off, since the ignited flames continue to burn as long as sufficient fuel and air are supplied.
  • the object of the invention is now to provide a new control for the ignition of an evaporative burner of a heating device, in particular a low energy consumption during operation of the glow plug to be achieved.
  • the fan initially starts with only a minimal output during the preheating phase with the glow plug switched on and the fuel pump still stationary, in that the fuel pump then runs with minimal or very low blower output with low delivery capacity begins, and that after ignition of a flame, the blower output is delayed, with a subsequent increase in the delivery capacity of the pump, preferably several times.
  • the invention is based on the general idea of restricting the air supply to the evaporation burner as far as possible or completely refraining it during the preheating phase, in order to avoid undesired cooling of the glow plug in this phase.
  • the running fan should only ensure, if necessary, that the evaporation burner is freed of fuel residues and vapors which, under unfavorable operating conditions - for example if the heater is switched on and off several times in quick succession was - could possibly occur. Uncontrolled ignition is avoided by removing these residues and vapors.
  • the invention makes use of the surprising discovery that minimal operation of the blower is sufficient to blow the evaporation burner free.
  • the glow plug in the preheating phase in the invention is not significantly impaired in its heating effect either by an excessively cooling air flow or by fuel cooling or vapors which also have a cooling effect, the glow plug and the ignition zone of the evaporation burner can be heated up quickly. If the glow plug works at high power, the heat supply through the glow plug takes place significantly faster than the heat transport within the evaporation burner, with the result that sufficient temperatures are quickly reached in the vicinity of the glow plug to ignite fuel, while the evaporation burner otherwise stays cooler. This can achieve the desired effect that a smaller flame is ignited in the subsequent supply of a small amount of fuel with initially minimal fan power in the vicinity of the glow plug, which then in turn increasingly heats the evaporation burner without the need for further operation of the glow plug would.
  • the total energy consumption of the glow plug required during the ignition phase can be significantly reduced. It only has to be ensured that an energy supply is available for the glow plug, which enables a high power supply for a short time.
  • a shorter or - at low ambient temperatures - a longer period of time is provided for the preheating phase, depending on the ambient temperature. That way, at moderate "winter temperatures can significantly save electrical energy during the start of a heater.
  • this switch can also be used to switch the heater accordingly.
  • combustion chamber 1 has, in a generally known manner, a combustion chamber 1 which can be supplied with fuel via a metering pump 2 and combustion air via a blower 3 in a controllable manner.
  • the walls of the combustion chamber 1 or wall areas thereof are covered by a wire fleece or formed from such a material which receives the fuel supplied in the manner of a wick, the fuel evaporating from this wire fleece then burning off automatically with the supply of air.
  • a glow plug 1'' is housed which, in the manner shown below, serves to ignite the fuel, which is preferably conducted to the combustion chamber 1 via the bag space 1 'or the surroundings of the glow plug 1''.
  • a heat exchanger 4 Connected to the combustion chamber 1 is a heat exchanger 4, which has a gas space 5 through which the combustion gases emerging from the combustion chamber 1 flow, and a hydraulic space 6 which is penetrated by a hydraulic heat transfer medium, usually water, and which is opposite the gas space 5 by a gas jacket 7 and is completed to the outside by a water jacket 8.
  • the combustion gases enter the gas space 5 via a flame tube 9 arranged on the output side of the combustion chamber 1 and are deflected at the closed end of the gas space 5 facing away from the combustion chamber 1, so that they can be discharged to the outside via an exhaust gas line 10 and an exhaust gas silencer (not shown) after they have flowed along the wall of the gas jacket 7 with the transfer of heat to the hydraulic heat transfer medium.
  • the hydraulic space 6 is helical from the hydraulic heat transfer medium, which is guided through corresponding guide webs on the outside of the gas jacket 7, from an inlet 11 to an outlet 12 in one Flows through a circuit that leads via one or more radiators (not shown) and / or via the cooling circuit of a motor vehicle engine.
  • air can also be heated directly instead of the hydraulic heat transfer medium, which air is guided for this purpose by means of a separate fan over the outside of the gas jacket 7.
  • Diagram B shows the delivery rate Q of the metering pump 2 as a function of the time t.
  • Diagram C shows the occurrence of a signal S for flame detection as a function of time t.
  • Diagram D shows the electrical power W applied to the glow plug as a function of time t.
  • the heater should now be switched on at a time t 0 .
  • control of the heater switches the fan 3 to a very low power P 1 , which is essentially just sufficient to keep the combustion chamber 1 free of any fuel residues or fumes.
  • the glow plug 1 ′′ is switched on to a high power W h .
  • only the glow plug 1 ′′ can also be switched on at the time t 0 , the blower 3 is then started up with a delay at the time t 01 .
  • the metering pump 2 initially remains switched off.
  • the combustion chamber 1 or the bag space 1 ' is now preheated by the glow plug 1''.
  • the metering pump 2 is switched on and brought to a low delivery rate Q 1 .
  • the fuel now flowing in through the bag space 1 ' ignites again short time, so that at a time t 2 an output signal S 1 is generated by a flame detection sensor, not shown.
  • glow plug remains on for a short time. After a time t 3 , glow plug 1 ′′ then remains switched off.
  • the power of the fan 3 is ramped up continuously in such a way that a slightly increased fan power P 4 is achieved at a time t 4 .
  • the metering pump 2 is then raised to a slightly increased delivery rate Q 5 , which then initially remains unchanged, while the power of the blower 3 is ramped up again and reaches an average power P 6 at a time t 6 .
  • the delivery rate of the metering pump 2 is increased again at a time t 7 , namely to a value Q 7 .
  • the power of the blower 3 is ramped up until the large blower power P 8 is available for normal heating operation by the time t 8 . This concludes the heater start-up phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Processes For Solid Components From Exhaust (AREA)
  • Wick-Type Burners And Burners With Porous Materials (AREA)
  • Spray-Type Burners (AREA)
EP96110643A 1995-07-04 1996-07-02 Commande de l'allumage d'un brûleur à évaporisation Withdrawn EP0752558A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19524261A DE19524261B4 (de) 1995-07-04 1995-07-04 Verfahren zum Starten eines Verdampfungsbrenners
DE19524261 1995-07-04

Publications (2)

Publication Number Publication Date
EP0752558A2 true EP0752558A2 (fr) 1997-01-08
EP0752558A3 EP0752558A3 (fr) 1999-05-12

Family

ID=7765933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110643A Withdrawn EP0752558A3 (fr) 1995-07-04 1996-07-02 Commande de l'allumage d'un brûleur à évaporisation

Country Status (2)

Country Link
EP (1) EP0752558A3 (fr)
DE (1) DE19524261B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110171383A1 (en) * 2010-01-14 2011-07-14 Rohm And Haas Electronic Materials Llc Method for constant concentration evaporation and a device using the same
US9957612B2 (en) 2014-01-17 2018-05-01 Ceres Technologies, Inc. Delivery device, methods of manufacture thereof and articles comprising the same
US20230003157A1 (en) * 2021-07-05 2023-01-05 Robert Bosch Gmbh Method for operating an exhaust gas burner during its start phase

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924329B4 (de) * 1999-03-18 2005-06-16 J. Eberspächer GmbH & Co. KG Heizgerät für ein Kraftfahrzeug
DE102004060376B4 (de) * 2004-12-15 2016-07-21 Webasto Ag Verfahren zur Ansteuerung eines Heizgerätes in einem Kraftfahrzeug
DE102004062831A1 (de) * 2004-12-27 2006-07-13 J. Eberspächer GmbH & Co. KG Verfahren zum Starten eines Fahrzeugheizgerätes und Fahrzeugheizgerät
DE102021203083A1 (de) 2021-03-29 2022-09-29 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betreiben eines Abgasbrenners

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0271314A1 (fr) * 1986-12-10 1988-06-15 Isuzu Motors Limited Dispositif de commande d'une installation de chauffage pour une voiture
DE4323221C1 (de) * 1993-07-12 1994-12-15 Webasto Thermosysteme Gmbh Verfahren zum Starten eines brennerbetriebenen Heizgerätes
US5617995A (en) * 1994-04-22 1997-04-08 Nippon Soken Inc Combustion heater

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3136792C2 (de) * 1981-09-16 1983-11-24 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting Verfahren zum Starten und Betreiben eines Heizbrenners, insbesondere für eine Fahrzeugheizung, und Vorrichtung zum Durchführen eines solchen Verfahrens
DE3248412C2 (de) * 1982-12-28 1985-11-21 Webasto-Werk W. Baier GmbH & Co, 8035 Gauting Mit fließfähigem Brennstoff gespeistes Heizgerät
DE3740047C2 (de) * 1987-11-26 1994-07-21 Man Technologie Gmbh Verfahren und Vorrichtung zur Steuerung der Verbrennungsluft für einen Brenner
DE3905603A1 (de) * 1989-02-23 1990-08-30 Eberspaecher J Heizgeraet fuer mobile einheiten

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0271314A1 (fr) * 1986-12-10 1988-06-15 Isuzu Motors Limited Dispositif de commande d'une installation de chauffage pour une voiture
DE4323221C1 (de) * 1993-07-12 1994-12-15 Webasto Thermosysteme Gmbh Verfahren zum Starten eines brennerbetriebenen Heizgerätes
US5617995A (en) * 1994-04-22 1997-04-08 Nippon Soken Inc Combustion heater

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110171383A1 (en) * 2010-01-14 2011-07-14 Rohm And Haas Electronic Materials Llc Method for constant concentration evaporation and a device using the same
US8555809B2 (en) * 2010-01-14 2013-10-15 Rohm And Haas Electronic Materials, Llc Method for constant concentration evaporation and a device using the same
US9957612B2 (en) 2014-01-17 2018-05-01 Ceres Technologies, Inc. Delivery device, methods of manufacture thereof and articles comprising the same
US20230003157A1 (en) * 2021-07-05 2023-01-05 Robert Bosch Gmbh Method for operating an exhaust gas burner during its start phase
US11821351B2 (en) * 2021-07-05 2023-11-21 Robert Bosch Gmbh Method for operating an exhaust gas burner during its start phase

Also Published As

Publication number Publication date
DE19524261B4 (de) 2006-08-17
EP0752558A3 (fr) 1999-05-12
DE19524261A1 (de) 1997-01-09

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