WO2006060980A1 - Burner device for liquid fuel - Google Patents
Burner device for liquid fuel Download PDFInfo
- Publication number
- WO2006060980A1 WO2006060980A1 PCT/DE2005/002104 DE2005002104W WO2006060980A1 WO 2006060980 A1 WO2006060980 A1 WO 2006060980A1 DE 2005002104 W DE2005002104 W DE 2005002104W WO 2006060980 A1 WO2006060980 A1 WO 2006060980A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- preheating
- burner device
- preheating element
- fuel
- heating
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/44—Preheating devices; Vaporising devices
- F23D11/441—Vaporising devices incorporated with burners
- F23D11/448—Vaporising devices incorporated with burners heated by electrical means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D3/00—Burners using capillary action
- F23D3/40—Burners using capillary action the capillary action taking place in one or more rigid porous bodies
Definitions
- the invention relates to a burner device for liquid fuel, in particular for use in a heater of a motor vehicle, with an electrically heatable preheating element for preheating fuel before its combustion.
- Such burners are frequently used as motor-independent auxiliary heating in motor vehicles.
- Such vaporization burners have a porous vaporization element, e.g. a nonwoven or a porous solid, which is impregnated via a fuel supply with liquid fuel.
- the liquid fuel evaporates at the pores and at the surface of the evaporation element and forms an ignitable mixture with supplied combustion air.
- the mixture is removed by means of an electric ignition device, e.g. a glow plug, ignited.
- an electric ignition device e.g. a glow plug
- the evaporation element is often preheated. Firstly, this evaporation is generally supported; to another can through the preheating be guaranteed regardless of the ambient temperatures constant ignition conditions.
- liquid fuel is atomized into a mixing chamber where it is swirled with combustion air to form an ignitable mixture.
- the fuel can also be preheated in this type of burner, for example by heating the mixing chamber itself or preheating the fuel to be atomized.
- the ambient temperature does not necessarily allow a conclusion on component temperatures at the heater and the coolant temperature of the vehicle may have, for example by built-in valves in the coolant circuit temperature jumps, so that even measured at a location of the coolant circuit temperature value is not necessary, the temperatures of components in the Heater reflects.
- the sensors for ambient and / or coolant temperature and the control unit of the heater there is a need for communication between the sensors for ambient and / or coolant temperature and the control unit of the heater.
- different data protocols must be coordinated, which can pose considerable problems especially for retrofittable heaters.
- the preheating element is part of a measuring circuit, by means of which the preheating element for determining an electrical resistance with an electrical measuring current is chargeable.
- This invention is based on the idea of assigning a double function to the preheating element already present in the burner device and at the same time as preheating element and to use as a thermosensor. This idea is based on the knowledge that the electrical resistances of conventional preheating elements are strongly temperature-dependent. By measuring the electrical resistance of the preheating element can therefore be closed to its temperature and thus to the core temperature of the burner device.
- a control device which controls the charging of the preheating element with the measuring current and makes the determined resistance value or a value derived therefrom available for influencing the burner device control.
- the measured resistance value itself, a temperature value calculated therefrom, a temperature value read from a look-up table, or some other, derived value can be used to control the ignition process in a known manner.
- the preheating element is connected to electrical supply lines via which it can be charged both with an electrical heating current and with the measuring current.
- electrical supply lines can connect the heater to its control unit, which contains both a current source for the electrical heating of the preheating element and a current source and possibly an evaluation circuit for the measuring circuit.
- the charging of the preheating element is timed with measuring current or heating current.
- a weak measuring current can be periodic be sent through the preheating element, for example, to determine a suitable time to start the ignition process. If, for example, the temperature falls below a threshold temperature, this is determined on the basis of the resistance value determined, and a significantly higher heating current is conducted through the preheating element in the intervals between the individual resistance measurements.
- the preheating can be monitored by further, periodic resistance measurements during which the heating power is switched off for a short time in order to initiate the fuel supply, the actual ignition process at a suitable time and / or later to control temperature-dependent changes in the combustion conditions.
- the temporal timing, ie the switching between measuring and heating current is preferably controlled by the control unit of the heater.
- the preheating element is designed as an electrically directly heatable support plate of an evaporation element of an evaporative burner.
- the preheating element is designed as a wall of a mixing chamber for mixing liquid fuel and combustion air.
- the preheating element is designed as an electrical incandescent body for generating radiant heat.
- This can be the case, for example, in evaporative burners, in which the evaporation element is preheated indirectly by a heat radiator.
- This can be for example a glow plug, the advantageous way at the same time serves as an ignition device for the resulting ignitable mixture.
- the preheating element may be formed as an electric heating element surrounding a fuel supply line. In this case, a preheating of the still liquid fuel takes place.
- the heating element is located in the fuel supply, in particular in a sleeve overflowed with fuel. It can also be provided that the heating element is flowed around directly by the fuel.
- the flow guidance of the fuel via the sleeve can be positively influenced by guide elements on the sleeve surface (longitudinal grooves or longitudinal ribs, spiral ribs or the like). It is an annular gap structure in which the fuel is heated by an internal heating element.
- the temperatures determined by these can be used for a plausibility check of the temperatures measured by the preheating element.
- the additional temperature values can also be used to control the heater.
- the state of fuel delivery eg off, partial load or full load
- the operating condition of a fan eg off, partial load or full load speed
- the invention has the added advantage of a safety function.
- One example is so-called "back burners", which occur when the combustion air is dam- aged and can lead to inadmissibly high temperatures in the area of the fuel or combustion air supply.
- active heating operation of the preheating invention it is possible to close the ambient temperature or the medium temperature of combustion air and / or fuel by evaluating the heating power required for a given desired value of the heating resistor. This information can then be used in turn, for example, to make a dependent on the ambient temperature adjustment of the CO 2 adjustment of the combustion. This means that the blower output is adjusted to the set fuel mass flow.
- This evaluation of the heating power required in active heating operation can also be used to detect the fuel filling state in the region of the preheating element. This information can then be used to start the starting process at the filling level of the fuel system. Tems be adapted, for example, which can be used to reduce soot formation or NO x formation.
- Figure 1 is a schematic representation of an evaporation element according to an embodiment of the invention.
- FIG. 1 shows a preferred exemplary embodiment of the present invention with reference to an evaporation element of a heating device, which is particularly suitable for use in a motor vehicle independent of the engine.
- the evaporation element is composed of a sealing layer 10, an insulating layer 12, an electrically heatable preheating element 14, a distributor plate 16 for liquid fuel and an evaporation body 18.
- the evaporation element forms the bottom of a cylindrical combustion chamber, the outer wall 20 is shown in Figure 1 only on one side.
- a fuel supply line 22 of the distributor plate 16 liquid fuel is supplied, with which a porous evaporation body 18 is wetted. From the surface of the porous evaporation body 18, the supplied fuel vaporizes and forms with likewise supplied combustion. (not shown) an ignitable mixture which can be ignited at an appropriate time by means of an ignition device 24.
- a preheating element 14 is provided, which is designed as an electrically heatable plate, which can carry heating coils, for example.
- the preheating element 14 performs a dual function, namely the previously described preheating function for supporting the fuel evaporation and an additional function as a temperature sensor.
- the preheating element 14 is connected to a control device 26 shown schematically.
- a current source 28 for generating a heating current I H is arranged in the control unit 26, a current source 28 for generating a heating current I H is arranged.
- the heating current source 28 can be connected via a switch 30 with the preheating element 14, so that it is charged with a heating current which is sufficiently large to ensure rapid heating of the preheater and the adjacent evaporation body 16.
- the preheating element 14 In the illustrated in Figure 1 position of the switch 30, the preheating element 14, however, with a second current source, the measuring current source 32 is connected. In this switch position, the preheating element 14 is charged with a measuring current I M , which is much weaker than the heating current. In particular, the measuring current should be dimensioned so that no significant heating of the preheating element 14 is generated by it.
- a measuring device with which, with the knowledge of the measuring current source parameters, the usual way is based on the measuring current on the electrical resistance of the preheating element. mentes 14 can be closed. Since the electrical resistance of conventional electrically conductive materials, in particular metals, strongly depends on their temperature, it is possible to deduce its temperature from the measured electrical resistance of the preheating element.
- the exemplary embodiment shown is particularly favorable, since an additional supply line for the connection between preheating element 14 and measuring current source 32 is not required.
- a combined measuring / heating current source can be provided, whose parameters are monitored and used for resistance measurement.
- the current can be changed between measuring and heating periods.
- the heating current itself as the measuring current, which, however, could lead to measured value distortions because of the associated heating of the preheating element.
- the person skilled in the art has extensive possibilities for variation.
- the specific embodiment of the heating device or the preheating element is not limited to the embodiment described in the context of the specific description and illustrated in the FIGURE. Rather, the preheating element, to which the double function according to the invention is assigned as a temperature sensor, can also be designed as a heat radiation source, mixing chamber wall or in another way.
- the double use of the electrical supply line shown in FIG. 1 is also not absolutely necessary within the scope of the invention.
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)
- Spray-Type Burners (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05812661A EP1825193A1 (en) | 2004-12-08 | 2005-11-23 | Burner device for liquid fuel |
CA002600615A CA2600615A1 (en) | 2004-12-08 | 2005-11-23 | Burner device for liquid fuel |
JP2007544725A JP2008523342A (en) | 2004-12-08 | 2005-11-23 | Burner for liquid fuel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004059148.2 | 2004-12-08 | ||
DE102004059148A DE102004059148A1 (en) | 2004-12-08 | 2004-12-08 | Burning device for liquid fuel |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006060980A1 true WO2006060980A1 (en) | 2006-06-15 |
Family
ID=36177630
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2005/002104 WO2006060980A1 (en) | 2004-12-08 | 2005-11-23 | Burner device for liquid fuel |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1825193A1 (en) |
JP (1) | JP2008523342A (en) |
KR (1) | KR20070091184A (en) |
CN (1) | CN101111714A (en) |
CA (1) | CA2600615A1 (en) |
DE (1) | DE102004059148A1 (en) |
WO (1) | WO2006060980A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018200464A1 (en) * | 2018-01-12 | 2019-07-18 | Continental Automotive Gmbh | Apparatus and method for heating a device for exhaust aftertreatment |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0029102A1 (en) * | 1979-11-15 | 1981-05-27 | LGZ LANDIS & GYR ZUG AG | Control device for an oil burner with an oil preheating device |
DE19822140C1 (en) * | 1998-05-16 | 1999-08-12 | Webasto Thermosysteme Gmbh | Method of flame monitoring for motor vehicle heater with a glow pin with two parallel glow coils |
WO2001097566A1 (en) * | 2000-06-14 | 2001-12-20 | Elias Russegger | Electric heating device |
US20020086253A1 (en) * | 1995-05-10 | 2002-07-04 | Young Thomas M. | Vaporization and pressurization of liquid in a porous material |
EP1275901A2 (en) * | 2001-06-26 | 2003-01-15 | J. Eberspächer GmbH & Co. KG | Vaporizing burner |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT310996B (en) * | 1970-11-02 | 1973-10-25 | Vaillant Joh Kg | Instantaneous water heater |
EP0287596B1 (en) * | 1986-10-27 | 1990-03-28 | Olymp-Werk A. Schwarz Gesellschaft M.B.H. | Burner for the combustion of liquid fuel |
DE19527256C2 (en) * | 1994-12-06 | 1999-09-02 | Eberspaecher J Gmbh & Co | Device for preheating diesel fuel for heaters in mobile units |
DE10136292A1 (en) * | 2001-07-25 | 2003-02-13 | Eberspaecher J Gmbh & Co | Vaporizer burner used in heating devices of motor vehicles comprises an ignition heating element igniting fuel vapor, and a vaporizer heating element influencing the vaporizing characteristics of a vaporizer medium |
-
2004
- 2004-12-08 DE DE102004059148A patent/DE102004059148A1/en not_active Ceased
-
2005
- 2005-11-23 EP EP05812661A patent/EP1825193A1/en not_active Withdrawn
- 2005-11-23 CN CNA2005800474505A patent/CN101111714A/en active Pending
- 2005-11-23 KR KR1020077015493A patent/KR20070091184A/en not_active Application Discontinuation
- 2005-11-23 JP JP2007544725A patent/JP2008523342A/en active Pending
- 2005-11-23 WO PCT/DE2005/002104 patent/WO2006060980A1/en active Application Filing
- 2005-11-23 CA CA002600615A patent/CA2600615A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0029102A1 (en) * | 1979-11-15 | 1981-05-27 | LGZ LANDIS & GYR ZUG AG | Control device for an oil burner with an oil preheating device |
US20020086253A1 (en) * | 1995-05-10 | 2002-07-04 | Young Thomas M. | Vaporization and pressurization of liquid in a porous material |
DE19822140C1 (en) * | 1998-05-16 | 1999-08-12 | Webasto Thermosysteme Gmbh | Method of flame monitoring for motor vehicle heater with a glow pin with two parallel glow coils |
WO2001097566A1 (en) * | 2000-06-14 | 2001-12-20 | Elias Russegger | Electric heating device |
EP1275901A2 (en) * | 2001-06-26 | 2003-01-15 | J. Eberspächer GmbH & Co. KG | Vaporizing burner |
Also Published As
Publication number | Publication date |
---|---|
DE102004059148A1 (en) | 2006-06-14 |
EP1825193A1 (en) | 2007-08-29 |
JP2008523342A (en) | 2008-07-03 |
CN101111714A (en) | 2008-01-23 |
CA2600615A1 (en) | 2006-06-15 |
KR20070091184A (en) | 2007-09-07 |
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