WO2008135010A2 - Dispositif de chauffage et procédé d'alimentation en combustible d'un dispositif de chauffage - Google Patents

Dispositif de chauffage et procédé d'alimentation en combustible d'un dispositif de chauffage Download PDF

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Publication number
WO2008135010A2
WO2008135010A2 PCT/DE2008/000675 DE2008000675W WO2008135010A2 WO 2008135010 A2 WO2008135010 A2 WO 2008135010A2 DE 2008000675 W DE2008000675 W DE 2008000675W WO 2008135010 A2 WO2008135010 A2 WO 2008135010A2
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WO
WIPO (PCT)
Prior art keywords
fuel
heater
heating device
vehicle
heating
Prior art date
Application number
PCT/DE2008/000675
Other languages
German (de)
English (en)
Other versions
WO2008135010A9 (fr
WO2008135010A3 (fr
Inventor
Nils Elm
Karsten Köhler
Original Assignee
Webasto 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 Webasto Ag filed Critical Webasto Ag
Priority to EP08757967A priority Critical patent/EP2139708A2/fr
Publication of WO2008135010A2 publication Critical patent/WO2008135010A2/fr
Publication of WO2008135010A3 publication Critical patent/WO2008135010A3/fr
Publication of WO2008135010A9 publication Critical patent/WO2008135010A9/fr

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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
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H1/2203—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H2001/2268—Constructional features
    • B60H2001/2284—Fuel supply

Definitions

  • the invention relates to a heating device for a vehicle, comprising an engine-independent, fuel-operated heating device which can be coupled to a fuel supply system of the vehicle such that the heating device is connected to a vehicle tank at least via a fuel feed pump of the fuel supply system, and with a metering and conveying device for supplying and metering fuel to the heating device, wherein the metering and conveying device downstream of the fuel feed pump and upstream of the heating device.
  • the invention further relates to a method for controlling a fuel supply of a motor-independently operable Heating device of such a heater for a vehicle.
  • the invention relates to a heating device for a vehicle, with a motor-independent, fuel-operated heating device, wherein the heating device with a fuel supply system of the vehicle is coupled such that the heater at least via a fuel feed pump of the fuel supply system with a vehicle tank is connected, wherein a valve device for metering a fuel supply to the heating device downstream of the fuel feed pump and the heater is upstream.
  • the invention furthermore relates to a method for controlling / regulating a fuel supply of a motor-independently operable heating device of such a heating device.
  • a conventional prior art heater is shown, for example, in Figure 1, which is coupleable to a conventional fuel supply system of a vehicle.
  • the fuel supply system comprises a fuel tank 18 ', which is at least partially filled with fuel and in which a swirl pot 20' is provided in the usual way.
  • a feed line 14 ' via which an internal combustion engine 12' can be supplied with fuel, flows into the swirl pot 20 "
  • a fuel feed pump 22' is coupled to the feed line 14 ', which is preferably in the area of the swirl pot 20 ' is arranged.
  • a return line 16 'originating from the internal combustion engine 12' flows into the swirl pot 20 ', via which residual fuel from the internal combustion engine 12' can be returned to the vehicle tank 18 '.
  • a heater 10 ' is coupled to the fuel supply system of the vehicle.
  • a heating device 30 ' is directly connected via a fuel line 24' to the vehicle tank 18 'or the fuel line 24' opens into the swirl pot 20 ', whereby a fuel supply of the
  • Heating device 30 'directly from the vehicle tank 18' is made possible.
  • a reciprocating metering pump 28' is provided in the fuel line 24 ', which can be controlled by a control device 32' for fuel delivery to the heater 30 '.
  • the control device 32 ' is coupled for this purpose for controlling the reciprocating piston metering pump 28' via a control line 34 'with the reciprocating metering pump 28'.
  • the fuel is thus sucked via the reciprocating dosing pump 28 'from the swirl pot 20' mounted in the vehicle tank 18 'or alternatively directly from the vehicle tank 18' via a further fuel line 26 'and to the heating device 30', which is designed, for example, as a combustion heater is, encouraged.
  • a volume or mass flow of the conveyed fuel to the heating device 30 ' is varied by the control device 32' in accordance with the operating conditions of the heating device 30 ', for example via a drive frequency of the reciprocating piston metering pump 28'.
  • the heating device 10 'shown in FIG. 1 does not use any of the vehicle's own components, that is to say components which are already used in the vehicle for fuel injection. supply of the internal combustion engine 12 'are located.
  • the vehicle is equipped via the swirl pot arranged in the vehicle tank and a strainer at an inlet of the fuel feed pump with a system which promotes fuel as bubble-free as possible or at least low-bubble to the vehicle engine.
  • the fuel for the heater is taken directly from the vehicle tank, the fuel can be removed during dynamic driving. Swing away movements on a sampling tube or the fuel line, so that air is sucked in. This is at least partially avoided by the fuel from the swirl pot is sucked.
  • the fuel in the swirl pot may still partially contain bubbles, for example, due to strong dynamic driving movements of the vehicle and / or by a little filled vehicle tank and / or by an inclined position of the vehicle.
  • the heater is dependent on a continuous and low-bubble fuel supply.
  • the fuel sloshing away from the vehicle fuel tank or the bubbles present in the fuel may result in high exhaust emissions combustion or extinction of a flame in a heater burner.
  • a known, generic heating device is known for example from DE 100 60 355 Al.
  • the heating device is coupled to the vehicle tank via a fuel feed pump.
  • this heater By coupling this heater to the fuel supply system of the vehicle, the application can be realized in a cost effective manner.
  • operation of the fuel delivery pump is always necessary when a fuel filler is to be filled to a certain degree of filling with fuel.
  • a conveyor In order to remove fuel from the fuel tank, in turn, a conveyor is provided, which promotes the fuel from the fuel storage to the heater.
  • the fuel delivery pump of the fuel supply system must be operated to promote fuel, even if an internal combustion engine of the vehicle is turned off. This leads to a high power take-off of a vehicle battery of the vehicle, which must provide the power required for the operation of the fuel feed pump.
  • a known, generic heating device according to the second aspect of DE 102 18 900 Al is known.
  • this heater is provided to ensure a fuel supply to the heater by the vehicle's own fuel pump is driven.
  • the fuel pump of the vehicle is always operated when the heater is to be put into operation.
  • the fuel delivery pump is therefore always operated when the operation of the heater is to be ensured. This may in some cases lead to faster discharge of the vehicle battery when the heater is operated in a parking heating operation with the internal combustion engine switched off. Under certain circumstances, this leads to the fact that the vehicle can not be started due to the strong discharge of the vehicle battery.
  • the invention is therefore based on the object, the generic heating devices and methods for controlling / regulating the fuel supply of such heating devices in such a way that the aforementioned disadvantages can be overcome at least partially.
  • the heating device according to the invention builds on the generic state of the art in that a control device is provided which is suitable to control the metering and conveying device with switched off or non-promoting fuel delivery pump so that they directly via the fuel feed pump fuel from the vehicle tank to the heater promotes and dosed a corresponding fuel supply.
  • a control device is provided which is suitable to control the metering and conveying device with switched off or non-promoting fuel delivery pump so that they directly via the fuel feed pump fuel from the vehicle tank to the heater promotes and dosed a corresponding fuel supply.
  • the fuel delivery pump of the vehicle is supercharged, that is to say the fuel is removed from the vehicle tank, in particular from a swirl pot in the vehicle tank, via the fuel feed pump and the fuel line to the heating unit. supported.
  • the heater while the internal combustion engine of the vehicle, however, promotes the fuel pump of the vehicle at full power, the dosing and conveying device doses only the fuel to the heater.
  • a corresponding fuel volume flow or fuel mass flow to the heating device can be set, for example, via the metering and conveying device of the heating device.
  • the heating device according to the invention can be developed in an advantageous manner so that the control device is suitable for controlling the metering and conveying device in such a way that, in a stationary heating operation of the heating device with the fuel feed pump switched off or not conveying fuel to the heating device, directly from the vehicle tank via the fuel feed pump promotes and meters the fuel supply.
  • the fuel pump with high power consumption in this case need not be controlled separately as in the prior art, to allow a fuel supply to the heater, but only the metering and conveying device with lower power consumption.
  • the control or regulation of the fuel delivery pump of the vehicle, as well as the control of the metering and conveying device of the heater by the control unit or the control device of the heater or by an on-board control unit via an electric bus or its own electrical line done.
  • the operation of the metering and conveying device instead of the fuel delivery device of the vehicle, the Anlagenbat- terie not so heavily loaded, since the power consumption of the metering and conveying device is less than the high power consumption of the fuel pump.
  • the power consumption of an unregulated fuel pump is typically in the range of 60 to 100 watts.
  • the power to be output by the vehicle battery is reduced in accordance with the invention by operating the metering and conveying device of the heating device in the auxiliary heating mode.
  • the heater according to the invention leads to the elimination of a separate tank removal and a separate conduit system for the heater, which costs are saved considerably.
  • the vehicle's fuel and fuel lines are used. As a result, the long suction-side and pressure-side fuel lines of the heater are replaced by short lines.
  • the heating device according to the invention can be further developed such that the control device is suitable for controlling the metering and conveying device such that it merely meters the fuel supply to the heating device during a heating operation of the heating device while the fuel feed pump is running.
  • the fuel delivery pump of the vehicle is operated during Zuterrorism worriess with the vehicle engine or engine running. The librarianentnähme the vehicle battery is thus not increased, since the fuel pump is taken in any case for fuel supply of the internal combustion engine in operation.
  • the heating device according to the invention can be realized so that the control device suitable is to operate both the fuel delivery pump and the metering and conveying device at least for fuel delivery at the same time, if the operating conditions of the vehicle and / or the heater require it.
  • the heating device can be realized such that the control device is suitable for controlling the fuel feed pump at predetermined time intervals despite the present auxiliary heating operation in order to operate the fuel feed pump at least temporarily.
  • the fuel delivery pump is driven only in variable, predetermined time intervals for a defined period or a defined period of time to promote a certain amount of fuel. This ensures that the surge pot is sufficiently filled at all times and the fuel system of the vehicle is purged.
  • the temporary intake of bubbles into the fuel system of the vehicle can be accepted to some extent if the system is sufficiently purged at defined intervals and thereby the bubbles are discharged from the fuel.
  • the reliability of the heater is thereby increased because the occurrence of bubbles in the heater supplied fuel is greatly reduced.
  • the heating device according to the invention can be realized in such a way that the control device is suitable for controlling the fuel dispenser pump for conveying fuel, if the control of the metering and conveying device for conveying fuel to the heating device or the fuel delivery to the heating device are controlled by the door. sier and conveyor failed. Should the control or the fuel delivery through the metering and delivery device fail, the heating device can nevertheless be operated, since in this case the fuel pump of the vehicle conveys fuel.
  • the heating device according to the invention can be developed such that the heating device can be coupled to the fuel supply system of the vehicle via a fuel feed line of an internal combustion engine of the vehicle and / or a fuel return line of the internal combustion engine and / or a fuel-flow component on or in the internal combustion engine.
  • the method according to the invention builds on the generic state of the art in that the metering and conveying device with fuel pump switched off or not conveying fuel via the fuel delivery pump directly from the vehicle tank to the heater promotes and a corresponding fuel supply dosed.
  • Vehicle tank via the fuel pump promotes and meters the fuel supply.
  • the method according to the invention can be realized in such a way that the metering and conveying device merely meters the fuel supply to the heating device in a heating operation of the heating device while the fuel feed pump is running.
  • the method according to the invention can be carried out so that both the fuel feed pump and the metering and conveying device are operated at the same time at least for fuel delivery, if the operating conditions of the vehicle and / or the heating device so require.
  • the method according to the invention can be designed so that the fuel feed pump is operated at least temporarily at predetermined time intervals despite the present auxiliary heating operation.
  • the fuel pump is driven to fuel delivery when the control of the metering and conveying device for fuel delivery to the heater or the fuel delivery to the heater has failed by the metering and delivery.
  • the method according to the invention can be implemented such that the fuel for the heating device is taken from the fuel supply system of the vehicle via a fuel supply line of an internal combustion engine of the vehicle and / or a fuel return line of the internal combustion engine and / or a component through which fuel flows on or in the internal combustion engine becomes.
  • the heating device builds on the generic state of the art in that a control device is provided which is suitable for driving the fuel delivery pump for fuel delivery in a heating operation of the heating device so that it is operated with a power consumption is lower than a power consumption of the operated in a Zuloom Sea the heater fuel feed pump.
  • the fuel delivery pump is operated in the usual manner with the power consumption required for the operation of the internal combustion engine during a heating operation when the internal combustion engine of the vehicle is running. In the auxiliary heating mode with the vehicle engine switched off, however, the fuel delivery pump is activated differently. This may be related by the controller.
  • the heating device provides to control the fuel feed pump during the parking heating operation so that their power consumption is reduced. This can be done, for example, by regulating or controlling to a low speed by means of pulse width modulation.
  • the heating device according to the invention can be developed in an advantageous manner such that the valve device is preceded by a volumetric flow and / or mass flow sensor, via whose measured values a fuel volume flow can be controlled / regulated by the valve device.
  • the fuel flow is thus determined via a mass flow or volume flow sensor.
  • the control device or the Control the fuel flow through the valve device accordingly control / regulate.
  • the heating device according to the invention can advantageously be further developed in such a way that an exhaust gas sensor is located downstream of the valve device and the heating device, via the measured values of which a fuel volume flow through the valve device can be controlled / regulated.
  • an exhaust gas sensor is located downstream of the valve device and the heating device, via the measured values of which a fuel volume flow through the valve device can be controlled / regulated.
  • the composition of the exhaust gas with respect to a substance relevant for the combustion in the heating device can be determined. For example, the concentration of carbon monoxide (CO), carbon dioxide (CO 2 ) or oxygen (O 2 ) can be measured. This can be concluded that a fuel-air ratio in a combustion chamber of the heater.
  • Substance is set according to the operating conditions of the heater, a target value, wherein the control unit on the basis of the measured values of the exhaust gas sensor and the exhaust gas setpoint values controls the Brennstoffström via the valve means.
  • the heating device according to the invention can be formed so that the valve device is preceded by a pressure-reducing valve or a pressure sensor.
  • a pressure of the fuel supply system can be reduced to a pressure required for the operation of the heating device.
  • a pressure sensor may be provided which measures a pressure in front of the valve device. On the basis of the detected pressure, for example, the volume / mass flow of the
  • Fuel are controlled by the valve device / regulated.
  • the heating device according to the invention can be developed so that a heating unit upstream of the valve device and upstream or downstream of the pressure reducing valve or the pressure sensor.
  • a heating unit or the heating element of the fuel can be heated to a certain temperature, which is monitored for example by a temperature sensor. Knowing the fuel temperature and the type of fuel can be concluded that a certain viscosity of the fuel.
  • the heating device can be realized such that the control device is suitable for controlling a fuel volume flow through the valve device based on a detected temperature and / or a detected pressure of the fuel by controlling the valve device.
  • the controllable heating element or the heating unit heats the fuel before the valve device to a specific setpoint temperature.
  • the actual temperature of the fuel can be measured and the heating power of the heating unit can thus be regulated accordingly.
  • the heating power is controlled in this case exclusively on the electrical resistance of the heating element.
  • a predetermined pressure is set in front of the valve device.
  • the pressure sensor used, the flow rate through the valve device can be controlled by means of a pressure-temperature map.
  • the method according to the invention builds on the generic state of the art in that the fuel feed pump for fuel delivery in a stationary heating operation of the heating device is controlled such that it is operated with a power consumption which is less than one
  • the method according to the invention can be advantageously developed in such a way that the valve device is activated in the form of a clocking solenoid valve or a motor-operated control valve. Furthermore, the method according to the invention can be realized such that a fuel volume flow is controlled / regulated by the valve device on the basis of measured values of a volume flow and / or mass flow sensor arranged upstream of the valve device.
  • the method according to the invention can be implemented in such a way that a fuel volume flow through the valve device is controlled on the basis of measured values of an exhaust gas sensor downstream of the valve device and the heating device.
  • inventive method can be implemented so that the valve device is controlled, which is preceded by a pressure reducing valve or a pressure sensor.
  • the method according to the invention is preferably configured in such a way that the valve device is actuated, upstream of which a heating unit upstream or downstream of the pressure-reducing valve or the pressure sensor is arranged.
  • a fuel volume flow through the valve device based on a detected temperature and / or a detected pressure of the
  • Fuel is controlled by controlling the valve device / regulated.
  • Figure 1 is a schematic representation of a heating device according to the prior art
  • Figure 2 is a schematic representation of a heating device according to the invention according to a first embodiment of the invention, which is suitable for carrying out the method according to the invention;
  • FIG. 3 is a schematic representation of a heating device according to a second embodiment of the invention, which is suitable for carrying out the method according to the invention;
  • Figure 4 is a schematic representation of a heating device according to the invention according to a third embodiment of the invention, which is suitable for carrying out the method according to the invention;
  • FIG. 5 is a schematic representation of a heating device according to the invention according to a fourth embodiment of the invention, which is suitable for carrying out the method according to the invention.
  • Figure 6 is a schematic representation of a heating device according to the invention according to a fifth embodiment of the invention, which is suitable for carrying out the method according to the invention.
  • FIG. 2 shows a schematic representation of a heating device 10 according to the invention according to a first embodiment.
  • the heating device 10 according to the invention comprises a heating device 30, which in this exemplary embodiment is a combustion heater that can be operated with fuel and engine-independently, in particular a parking heater, which has conventional components known to the person skilled in the art.
  • the heater 30 is coupled to a fuel supply system of a vehicle via a fuel line 24.
  • a metering and conveying device 28 in particular a reciprocating metering pump, is provided in the fuel line 24.
  • the metering and conveying device 28 is activated for operation by a control device 32 assigned to the heating device 10.
  • the fuel supply system supplies a combustion engine 12 of a vehicle with fuel and for this purpose comprises a vehicle tank 18 with a surge pot 20 provided therein.
  • the combustion engine 12 is coupled to the vehicle tank 18 via a supply line 14.
  • the feed line 14 opens into the swirl pot 20 within the vehicle tank 18.
  • a fuel feed pump 22 is provided in the feed line 14, which is preferably arranged in the vicinity of the swirl pot 20.
  • the internal combustion engine 12 is equipped with a return line 16, which just as the supply line 14 opens into the swirl pot 20 within the vehicle tank 18.
  • the heater 30 is coupled to the vehicle tank 18 by at least one of three coupling lines 36, 38, 40 in this embodiment.
  • a first coupling line 36 connects the fuel line 24 to the flow line 14.
  • the heater 30 is connected to the vehicle tank 18 only via the first coupling line 36.
  • a second Coupling line 38 connects the fuel line 24 to the return line 16.
  • a third coupling line 40 is provided, which couples the fuel line 24 with a component through which fuel flows in or on the internal combustion engine 12.
  • the control device 32 is provided, which is coupled in particular via a control line 34 with the metering and conveying device 28.
  • the control device 32 may be an already existing control device of the vehicle or a separate control device 32 provided for the heating device 10. Therefore, the control device 32 is either coupled via a bus system to a vehicle-specific control device, not shown, or coupled directly to the fuel delivery pump 22 of the vehicle's own fuel supply system.
  • the operation of the heating device according to the invention or the method according to the invention for controlling / regulating a fuel supply of the engine-independently operable heating device 30 is as follows.
  • the fuel delivery pump 22 operated, which provides the internal combustion engine 12 via the vehicle tank 18, in particular via the swirl pot 20 within the vehicle tank 18, fuel via the flow line 14. A portion of this fuel can pass through the return line 16 back into the swirl pot 20 within the vehicle tank 18.
  • fuel passes via at least one of the three coupling lines 36, 38, 40 into the fuel line 24 of the heating device 10.
  • the fuel flows from the fuel line 24 via the metering and conveying device 28 to the heater 30.
  • control device 32 controls the metering and conveying device 28 such that it only meters and sets a required for the operation of the heater 30 fuel flow or fuel mass flow. A promotion by the metering and delivery device is not required in this case due to the current fuel delivery pump 22 of the vehicle.
  • the internal combustion engine 12 is switched off. Therefore, the fuel delivery pump 22 of the vehicle is not operated because the fuel supply of the engine 12 is not required.
  • the control device 32 controls the metering and conveying device 28, so that it is operated in a conveying operation for fuel supply of the heating device 30.
  • the metering and delivery device 28 sucks via the fuel line 24 and at least one of
  • Coupling lines 36, 38, 40 fuel from the vehicle tank 18, in particular from the swirl pot 20.
  • fuel is sucked only via the first coupling line 36 from the flow line 14 via the fuel pump 22 from the swirl pot 20 within the vehicle tank 18.
  • the fuel feed pump 22 is sucked by the metering and conveying device 28.
  • the auxiliary heating operation of the heating device 30 can be ensured by the metering and conveying device 28, wherein the metering and conveying device 28 in this case promotes and doses.
  • the metering and conveying device 28 of Figure 2 is replaced by a valve device which is formed by a clocking solenoid valve or a motorized control valve and thus only for dosing the fuel flow to the heater 30 is capable.
  • the method according to the invention is designed as follows. In a Zumosgorge the heater
  • the engine 12 is operated. Accordingly, the fuel delivery pump 22 is also operated to provide fuel to the engine 12 via the supply line 14.
  • the heating device 30 is supplied with fuel via at least one of the coupling lines 36, 38, 40 and the fuel line 24.
  • the control device 32 controls the valve device such that a corresponding volume flow or mass flow of fuel flows to the heating device 30. Accordingly, the operation of the heater 30 is ensured.
  • the engine 12 is turned off. Since the metering and conveying device 28 is replaced by the valve device, it is necessary to control the fuel feed pump 22 via the control device 32.
  • the fuel delivery pump 22 for the operation of the heater 30 does not need to be driven with a power consumption that would be required for the operation of the internal combustion engine 12. Therefore, the control device 32 controls the fuel feed pump 22 for fuel delivery to the heating Device 30 such that the fuel delivery pump 22 is operated with a power consumption that is less than a power consumption with which the fuel delivery pump 22 would have to be operated during operation of the internal combustion engine 12.
  • the fuel delivery pump 22 is driven with a power consumption of 10 to 15 watts, so that the heater 30 can be supplied with sufficient fuel from the vehicle tank 18.
  • FIG. 3 shows a schematic representation of a heating device 100 according to the invention in accordance with a second exemplary embodiment of the invention.
  • the heating device 130 is preceded by a volumetric flow or mass flow sensor 142 in the fuel line 124, wherein the valve device 128 is arranged between the volumetric flow or mass flow sensor 142 and the heating device 130.
  • the control device 132 controls the volume flow or mass flow of the fuel in the fuel line 124, in that the control device 132 controls the valve device 128 for volume flow metering accordingly.
  • FIG. 4 shows a schematic representation of a heating device 200 according to the invention in accordance with a third exemplary embodiment of the invention.
  • a heating device 200 in accordance with a third exemplary embodiment of the invention.
  • the differences from the alternative exemplary embodiment of FIG. 2 are discussed, wherein identical or similar components are designated by similar reference numerals.
  • only one valve means 228 in the fuel line 224 of the heater 230 is upstream, and further downstream of an exhaust gas sensor 244 of the heater.
  • the exhaust gas sensor 244 is coupled to the control device 232, as a result of which the control device 232 receives the measured values of the
  • Exhaust gas sensor 244 can be provided.
  • the control device 232 controls the volume flow or mass flow of the fuel through the fuel line 224 by actuating the valve device 228.
  • the exhaust gas sensor 244 detects a concentration of carbon monoxide (CO), carbon dioxide (CO 2 ), or oxygen (O 2 ).
  • CO carbon monoxide
  • CO 2 carbon dioxide
  • O 2 oxygen
  • a fuel-air ratio in a combustion chamber of the heater 230 may be deduced, with the valve device 228 being driven accordingly based on a detected combustion relevant material.
  • the control of the volumetric flow or mass flow in the fuel line 224 to the heater 230 is based on the detected readings of the exhaust gas sensor 244.
  • FIG. 5 shows a schematic representation of a heating device 300 according to the invention in accordance with a fourth exemplary embodiment of the invention.
  • a pressure reducing valve 346 in the fuel passage 324 in the flow direction of the fuel supplied from the vehicle tank 318, a pressure reducing valve 346, a heating unit 348, a temperature sensor 350, and the valve device 328 precede the heater 330.
  • the pressure reducing valve 346 sets a certain pressure in front of the valve device 328.
  • the controllable heating unit 348 heats the delivered fuel to a certain desired temperature.
  • the actually present temperature of the fuel is detected by the temperature sensor 350, the measured values being made available to the control device 332 and the control device 332 correspondingly regulating the heating power of the heating unit 348 in order to possibly vary the actual temperature and the setpoint temperature to keep low.
  • the fuel flow ie the volume flow or mass flow of the fuel, can thus be controlled by triggering the fuel flow
  • Valve device 328 control / regulate, for example by appropriate timing of a valve device 328 forming Magnetventi1s.
  • FIG. 6 shows a schematic representation of the heating device 400 according to the invention in accordance with a fifth exemplary embodiment of the invention.
  • the pressure reducing valve 346 is replaced by a pressure sensor 452.
  • the pressure sensor 452 measures a pressure of the fuel present in the fuel line 424 in front of the valve device 428.
  • the controllable heating unit 448 heats the fuel to a specific desired temperature, this temperature being detected by the temperature sensor 450.
  • the fuel flow that is to say the volumetric flow or mass flow of the fuel, is regulated by actuation of the valve device 428 via a pressure-temperature characteristic diagram or a pure pressure characteristic diagram at a fixed predetermined temperature by the heating unit 448.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

L'invention concerne un dispositif de chauffage (10; 100; 200; 300; 400) pour un véhicule, comprenant un appareil de chauffage (30; 130; 230; 330; 430) pouvant fonctionner avec du combustible et indépendamment du moteur. Selon l'invention, l'appareil de chauffage peut être raccordé à un système d'alimentation en combustible du véhicule de sorte que l'appareil de chauffage soit relié à un réservoir de véhicule (18; 118; 218; 318; 418) par le biais d'une pompe (22; 122; 222; 322; 422) d'alimentation en combustible du système d'alimentation en combustible. Selon un premier aspect, l'invention concerne un dispositif de dosage et d'alimentation (28) destiné au dosage du combustible et à l'alimentation de l'appareil de chauffage (30) en combustible. Conformément au premier aspect de l'invention, un dispositif de commande (32) permet de commander le dispositif de dosage et d'alimentation (28), lorsque la pompe d'alimentation (22) est à l'arrêt ou n'assure pas l'alimentation, de manière à acheminer le combustible par l'intermédiaire de la pompe d'alimentation (22) directement du réservoir du véhicule (18) à l'appareil de chauffage (30) et à doser l'alimentation en combustible de manière correspondante. Selon un deuxième aspect, un dispositif à soupape (128; 228; 328; 428) pour le dosage de l'alimentation en combustible de l'appareil de chauffage est installé en aval de la pompe d'alimentation et en amont de l'appareil de chauffage. Conformément au deuxième aspect de l'invention, un dispositif de commande (32; 132; 232; 332; 432) permet de commander la pompe d'alimentation, dans un mode de chauffage d'appoint de l'appareil de chauffage, de manière à fonctionner avec une puissance absorbée est inférieure à une puissance absorbée de la pompe d'alimentation dans un mode de chauffage complémentaire de l'appareil de chauffage. L'invention concerne également un procédé d'alimentation en combustible d'un dispositif de chauffage conforme à l'invention selon le premier et le deuxième aspect.
PCT/DE2008/000675 2007-05-03 2008-04-22 Dispositif de chauffage et procédé d'alimentation en combustible d'un dispositif de chauffage WO2008135010A2 (fr)

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EP08757967A EP2139708A2 (fr) 2007-05-03 2008-04-22 Dispositif de chauffage et procédé d'alimentation en combustible d'un dispositif de chauffage

Applications Claiming Priority (2)

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DE102007020758.3A DE102007020758B4 (de) 2007-05-03 2007-05-03 Heizvorrichtung und Verfahren zur Brennstoffversorgung einer Heizvorrichtung
DE102007020758.3 2007-05-03

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WO2008135010A3 WO2008135010A3 (fr) 2009-02-12
WO2008135010A9 WO2008135010A9 (fr) 2009-04-09

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DE102010028736B4 (de) * 2010-05-07 2020-12-03 Eberspächer Climate Control Systems GmbH Brennstoffversorgungssystem, insbesondere für ein Fahrzeugheizgerät und Verfahren zum Betreiben eines Brennstoffversorgungssystems
DE102011052332A1 (de) * 2011-08-01 2013-02-07 Webasto Ag Verfahren zum Betreiben eines mobilen Heizgeräts

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DE19619861A1 (de) * 1996-05-17 1997-11-20 Eberspaecher J Gmbh & Co Motorunabhängiges Heizgerät für ein Kraftfahrzeug mit Verbrennungsmotor und Brennstoffpumpe
DE10060355A1 (de) * 2000-12-05 2002-06-20 Webasto Thermosysteme Gmbh Vorrichtung zur Kraftstoffversorgung eines motorunabhängig betreibbaren Fahrzeugheizgeräts
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DE102004008666A1 (de) * 2004-02-21 2005-09-22 Audi Ag Verfahren zur Betriebsführung von Kraftstoffpumpen
EP1847413A2 (fr) * 2006-04-10 2007-10-24 Bombardier Transportation GmbH Système d'alimentation en carburant pour véhicule

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DE102007020758A1 (de) 2008-11-06
EP2139708A2 (fr) 2010-01-06
WO2008135010A9 (fr) 2009-04-09
WO2008135010A3 (fr) 2009-02-12
DE102007020758B4 (de) 2017-01-26

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