EP0809021B1 - Verfahren und Vorrichtung zur Steuerung des Glühvorgangs einer Glühkerze eines Dieselmotors - Google Patents
Verfahren und Vorrichtung zur Steuerung des Glühvorgangs einer Glühkerze eines Dieselmotors Download PDFInfo
- Publication number
- EP0809021B1 EP0809021B1 EP97108081A EP97108081A EP0809021B1 EP 0809021 B1 EP0809021 B1 EP 0809021B1 EP 97108081 A EP97108081 A EP 97108081A EP 97108081 A EP97108081 A EP 97108081A EP 0809021 B1 EP0809021 B1 EP 0809021B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glow plug
- temperature
- glow
- heating
- power
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 77
- 230000006378 damage Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000000137 annealing Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/025—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs with means for determining glow plug temperature or glow plug resistance
Definitions
- the present invention relates to a method for operating a Diesel engine by controlling a glow operation of a glow plug, at which of the glow plug initially during the heating phase until reaching a target temperature, an electric heating power is fed, whose Amount is higher than the continuous power of the glow plug in continuous operation without Damage can be supplied, the duration of the heating phase so is dimensioned that no damage to the glow plug takes place, and in which after the heating phase, the heating power of the glow plug maximum of Continuous power corresponds and is regulated by the fact that the temperature of Incandescent filament of the glow plug measured and compared with a setpoint temperature and the heating power is regulated.
- EP 0 315 934 A1 discloses a method for controlling glow plugs Diesel engines, in which the flow of current to the glow plug through Pulse width modulation periodically off and on.
- DE 693 04 586 discloses a method for operating a diesel engine, in which in a so-called preheating the filaments of the Glow plugs of all cylinders are supplied. Further, if necessary the start of the engine still provided a reheating by means of the candles.
- US 4,444,160 also discloses a control for glow plugs of a Diesel engine, whereby the control also provides that before starting of the engine during a first heating period the glow plugs higher current is supplied, until a desired temperature is reached and then the heating power is reduced to the desired Keep temperature until the engine is safely started.
- US 4,137,885 discloses a circuit for driving glow plugs, where two input variables generate a control time for the glow plugs will not damage the candles and too long a pre-heat time avoid.
- US 5,144,922 discloses a circuit for driving glow plugs in Heating intervals, wherein between the heating intervals with a measuring current the Glow plug temperature is determined.
- Object of the present invention is to provide a generic method create, with which diesel engines can be operated optimally.
- the Glow plug is designed as a fast-heating rod glow plug, which of an electrical control unit can be heated up quickly such that at a given on-board voltage, they supply a certain current for a measured current Can absorb time so that they do not get a candle in no time can absorb harmful heating energy, where it is for applying the large current is advantageous, the rated voltage, i.
- the for the Continuous operation of the candle suitable voltage to which these are connected can be, without causing damage to the glow plug, smaller than to choose the rated voltage of the ship, and that after reaching the limit for the Ignition necessary candle temperature the energy input advantageously by a clocked power supply up to her Rated continuous power is throttled until the engine is started or the Annealing process is interrupted.
- the Glow plug control comprises a control unit, the heating power of Supply unit as a function of the temperature difference between the actually prevailing temperature of the filament and a predetermined set temperature controls.
- an interrupter unit comprises for determining the temperature of the filament, the one of a Supply unit of the filament supplied heating power interrupts.
- the temperature of the filament can in the inventive method be determined by the fact that the glow plug control an electrical Resistance of the filament determining and from the resistance value the Temperature of the filament calculating measuring unit comprises.
- the Glow plug is first operated with a power that keeps it in continuous operation can not withstand, but with whom they would blow. This high However, heating power is supplied to her only over a period of time, the like It is estimated that there is no damage to the gradually warming Glow plug enters.
- the glow plug is only so long with the high Heating power operated until it has reached its target temperature. The duration the heating phase is thus determined by the amount of heating power and can be fixed for each type of glow plug used be specified.
- one regulates the heating power of the glow plug by repeating the Temperature of a filament of the glow plug determined with a Setpoint temperature compares, and the heating power to reach a Set temperature corresponding to one of the determined temperature difference Value sets.
- the throttling of the heating power can be done in such a way that you can Amount of practically continuously supplied heating power reduced, or but by supplying the heating power of the glow plug clocked, i. in interrupts certain time intervals, the length of the interrupting Time intervals depending on the actual temperature of the Filament is adjusted.
- the glow plug in the heating phase with a very high performance operates, so that the glow plug is heated very quickly and that one to another determines the temperature of the filament of the glow plug and so on can determine when the setpoint temperature has been reached. As soon as that happens is throttled, the power supplied to the glow plug and the glow plug is operated at the maximum with the performance of the glow plug in continuous operation can be supplied without damage.
- All embodiments allow short energy provision times for Ignition of the fuel when starting diesel engines with glow plugs.
- the Exhaust emissions and engine wear are reduced during cold start occurs an increase in comfort by shortening the preheating time.
- the candle temperature stabilized by the process is by polling the temperature at the glow plug tip, so that at sinking temperature (low load operation of the engine) by supplying a calculated amount of electrical energy (intermediate annealing) the optimal Candle temperature is reached again, and this scheme during the total working time of the engine.
- the device according to the invention additionally comprises an arithmetic unit which in Dependence on the temperature difference between the actual value and the Desired value of the temperature of the filament to reach the Target temperature required amount of energy calculated.
- the glow plug is electrically connected to a Supply unit for providing an electric heating power for the Glow plug connected, wherein the heating power of the supply unit means the glow plug control is controllable.
- the glow plug with electrical energy supplied wherein the glow plug can be configured in such an advantageous manner can be that the value of the electrical voltage with which they are in continuous operation can be operated without damage, the so-called rated voltage, is lower than the on-board voltage, which is present for example in the vehicle.
- the nominal voltage of the candles a smaller Voltage is selected as the rated on-board voltage, preferably one Voltage equivalent to about half of the on-board voltage.
- the computing unit of Glow plug control device is designed such that at start interruption and restart after a short time Time by checking the candle temperature for the first quick start heat pulse the amount of energy or the exposure time is recalculated and regulated
- each annealing process in Operation of the engine is characterized in that in each case the current Temperature of the glow plug tip measured and for the achievement of the Set temperature necessary electrical energy with the help of the arithmetic unit is determined.
- one in continuous operation of the glow plug thereby regulates the heating power of the glow plug, by repeatedly determining the temperature of the filament of the glow plug, compared with the set temperature and the heating power to reach the Set temperature corresponding to one of the determined temperature difference Value sets.
- the adjustment of the heating power for Reaching the setpoint temperature take place in that the value of the heating power is reduced in continuous operation or that the heat output clocked is supplied and the length of the clock intervals of the temperature difference between the actual temperature, i. the actual temperature of the Filament, and the setpoint temperature corresponds.
- the heating power of the glow plug is also regulated in continuous operation, that is it thereby possible, even during any operating conditions of the engine additionally to perform annealing operations. It is advantageous if you the amounts of energy reaching a given actual temperature the setpoint temperature of the glow plug must be supplied, calculated and then the heating power as long as the glow plug feeds until the Glow plug has received the predetermined amount of energy. Thereby Driving characteristics and exhaust emissions are improved and there is a Reduction of fuel consumption and a reduction in wear of the Motors due to the optimization of combustion.
- the Heating power supply of the glow plug briefly interrupts.
- the time until, after an interruption of the heating power supply Temperature equilibrium within the glow plug is dependent on each type of glow plug used.
- the heating power supply for determining the temperature of Incandescent filament for about 50 to 60 msec interrupts. It turned out that in many cases within such a period of time Temperature equilibrium is achieved within the filament, so that one advantageously at the end of this period, the temperature of the filament determined and used to control the heating power.
- FIG. 1 is a functional diagram in a schematic manner a plant for controlling the annealing process in particular at Quick start of diesel engines (diesel) with adjustable Glow plugs for preheating during startup shown.
- the control unit 32 comprises a central control unit in the form of a Micro-controller control and power monitoring with Power output stages, to the terminals G1, G2, G3, G4, G5 and G6 are connected. Both the micro-controller control as well as the current monitoring are to the power supply the connection 29 connected.
- the micro-controller control is also via a line 12 with the current monitoring and via a line 14 directly to the power output stages connected.
- the micro-controller control connected via a line 16 to a terminal 31, to the the common ground (GND) is connected.
- the micro-controller control to a not shown in the drawing Engine control or to an engine management is connectable.
- To terminals G1 to G6 of the controller 32 glow plugs 20, 22, 24, 26, 28 and 30 are connected, which in addition with the common ground GND in Connection stand.
- the structure of the micro-controller control results from the Block diagram of the controller 32 in Figure 2.
- the micro-controller control comprises a power supply unit, a microprocessor and a driver and protection circuit.
- the microprocessor and the driver and protection circuit are connected by the connected to the terminal 29 of the controller 32 Power unit with electrical energy provided.
- the illustrated schematically in Figure 1 as a terminal DL Connection between micro-controller control and Motor control or engine management takes place via a data interface.
- a data interface for example, a single-wire connection or a CAN bus.
- each glow plug separate power output stage provided.
- Figure 2 only four output stages and only two glow plugs 28, 30 shown, in fact, however, just as many power amplifiers as Glow plugs used.
- the power amplifiers are each with the Driver and protection circuit of the micro-controller control in conjunction with a current measuring unit, which in turn to the driver and protection circuit and to the terminal 29th connected.
- a separate power amplifier can also be provided, 2 or more Glow plugs in a parallel circuit summarize and a glow plug group formed in this way with one final stage connect.
- the connecting lines between the power output stages and the glow plugs 20 to 30 serve on the one hand, the glow plugs to supply with electrical energy.
- the determination of the individual takes place via these lines Resistors and thus the temperature of the glow plugs.
- their power supply is temporarily interrupted, and instead, a test voltage is applied to the glow plugs applied and the current flowing through the filament of the current Current measuring unit measured.
- the controller the power amplifiers by means of the driver and protection circuit, the in turn is coupled to the microprocessor. From the measured current can be at a known test voltage in the usual Way the electrical resistance of the filament determined which in turn is assigned a certain temperature value can be.
- the thus determined actual temperature is with the Target temperature of the glow plug compared, and from the temperature difference is used by the microprocessor for reaching the desired temperature required heating power calculated, the then fed to the glow plugs via the output stages becomes.
- the glow plugs By repeated brief interruption of the heating power supply the glow plugs and determination of the respective Actual temperature is possible, the glow plugs inside heat up in a short time and in a stabilized manner on one To maintain target temperature.
- the heating power supply is each interrupted for the duration of about 55 ms, so that within the glow plug, a temperature equilibrium established.
- the current measurement to determine the resistance and therefore the temperature of the glow plug is at the end the interruption interval, the measuring time about 20 microseconds is and with a current measuring range of up to 200 Amp a smallest measurable resolution of about 1 amp is achieved.
- the control of the glow plugs by means of the above described controller 32 may be such that the supplied heating current of the respective temperature difference between actual and set temperature corresponds.
- the result resulting temperature and Schustromverlauf is in Figure 3 shown.
- the Indian respective power output stage associated glow plug is initially a high heating current I supplied, so that the Glow candle heats up considerably. With increasing actual temperature the heating current supply is reduced. This has to Result that the actual temperature of the set temperature of Gradually approaches the glow plug.
- Control of the glow plugs is the amplitude of the heating current I according to the temperature difference between actual and Desired temperature of the glow plug is reduced.
- FIG. 5 shows in one upper diagram the adjusting curve of the glow plug temperature T as a function of time t, which is results when the glow plug corresponding to that in a lower Diagram driven in the figure 5 shown control becomes.
- the lower diagram shows the glow plug control, i.e. the course of the glow plug current, depending on the time t.
- the heating phase and then holding the temperature are not on the starting process of the diesel engine or on a maximum glow plug temperature limited, but can also to the so-called intermediate annealing with the engine running and at a determined by the diesel engine control annealing temperature be applied.
- the Schusterzussel regularly interrupted for a duration of about 55 ms and on A temperature determination at the end of the interruption interval be carried out as with reference to the Figures 3 and 4 has already been explained.
- a corresponding Temperature determination can both during the heating 55 as well as during the hold phase 60. Does that have the the respective output stage assigned glow plug not yet theirs Target temperature reached, then the corresponding power amplifier via the driver and protection circuit of the microprocessor so controlled that the glow plug consistently a heating current supplied with maximum amplitude. After reaching the setpoint temperature, the heating current is only clocked, i.e.
- the duration of the interruption times i.e. the ratio of on / off times
- the power amplifiers can be used by the microprocessor by comparing the Actual temperature with the target temperature of the respective glow plug be calculated.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Description
- Figur 1:
- eine schematische Darstellung eines Steuergeräts zur Steuerung des Glühvorgangs der Glühkerzen eines Dieselmotors;
- Figur 2:
- ein Blockschaltbild des Steuergeräts aus Figur 1;
- Figur 3:
- den Verlauf der Glühkerzentemperatur und des zugeführten Heizstroms gemäß einer ersten Ausgestaltung der Ansteuerung der Glühkerze;
- Figur 4:
- eine vergrößerte Darstellung des Details A aus Figur 3 und
- Figur 5:
- den Verlauf der Glühkerzentemperatur und des zugeführten Heizstroms gemäß einer zweiten Ausgestaltung der Ansteuerung der Glühkerze.
Claims (11)
- Verfahren zum Betreiben eines Dieselmotors durch Steuerung eines Glühvorgangs einer Glühkerze, bei welchem der Glühkerze zunächst während der Aufheizphase bis zum Erreichen einer Solltemperatur eine elektrische Aufheizleistung zuführt wird, deren Betrag höher ist als die Dauerleistung, die der Glühkerze im Dauerbetrieb ohne Schädigung zugeführt werden kann, wobei die Dauer der Aufheizphase so bemessen ist, daß keine Schädigung der Glühkerze erfolgt, und bei welchem nach Ablauf der Aufheizphase die Heizleistung der Glühkerze maximal der Dauerleistung entspricht und dadurch geregelt wird, daß die Temperatur der Glühwendel der Glühkerze gemessen und mit einer Solltemperatur verglichen und die Heizleistung geregelt wird,
dadurch gekennzeichnet, daß als Glühkerzen schnell aufheizende Stabglühkerzen verwendet werden, daß von einer Glühkerzensteuerung die Temperatur der Glühwendel der Stabglühkerzen gemessen wird, daß die Temperatur der Glühkerzen umfassende Daten von Glühkerzenzuständen von der Glühkerzensteuerung einer Motorsteuerung übermittelt werden, daß die Solltemperatur von der Motorsteuerung der Glühkerzensteuerung vorgegeben wird, und daß von der Glühkerzensteuerung jede Glühkerze mit einer separaten Leistungsendstufe gesteuert wird. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Regelung auf die Solltemperatur während der gesamten Arbeitszeit des Motors erfolgt.
- Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Nennspannung der Kerzen kleiner als die Bordnennspannung gewählt wird.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Nennspannung zur Erreichung der Nennleistung der Glühkerzen etwa die Hälfte der vorhandenen Bordnennspannung beträgt.
- Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß bei Startunterbrechung und Neustart nach kurzer Zeit durch Prüfen der der Temperatur der Glühkerzen die Energiemenge bzw. die Einwirkzeit für den ersten Schnellstart-Heizimpuls neu berechnet und geregelt wird.
- Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß bei jedem Glühvorgang im Betrieb des Motors die aktuelle Temperatur der Glühkerzenspitze gemessen und die für das Erreichen der Solltemperatur notwendige elektrische Energie ermittelt wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß im Dauerbetrieb der Glühkerze die Heizleistung der Glühkerze dadurch geregelt wird, daß die Temperatur der Glühwendel der Glühkerze bestimmt und durch Vergleich mit der Solltemperatur eine Temperaturdifferenz bestimmt wird und daß die Heizleistung zum Erreichen der Solltemperatur auf einen der ermittelten Temperaturdifferenz entsprechenden Wert eingestellt wird.
- Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß von der Glühkerzensteuerung zum Bestimmen der Temperatur der Glühwendel der Stabglühkerze die Zufuhr der Heizleistung kurzzeitig unterbrochen und dann die Temperatur gemessen wird.
- Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß die Zufuhr der Heizleitung praktisch bis zum Erreichen eines Temperaturgleichgewichts innerhalb der Glühwendel unterbrochen wird.
- Verfahren nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Zufuhr der Heizleistung für etwa 50 bis 60 msek unterbrochen wird.
- Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß Glühkerzen verwendet werden, die kurzzeitig die doppelte Nennspannung verkraften, ohne daß eine Schädigung der Kerzen eintritt.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19620258 | 1996-05-21 | ||
| DE19620258 | 1996-05-21 | ||
| DE19708430A DE19708430A1 (de) | 1996-05-21 | 1997-03-01 | Verfahren und Vorrichtung zur Steuerung des Glühvorgangs einer Glühkerze eines Dieselmotors |
| DE19708430 | 1997-03-01 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0809021A2 EP0809021A2 (de) | 1997-11-26 |
| EP0809021A3 EP0809021A3 (de) | 1999-08-04 |
| EP0809021B1 true EP0809021B1 (de) | 2005-01-19 |
Family
ID=26025854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97108081A Expired - Lifetime EP0809021B1 (de) | 1996-05-21 | 1997-05-17 | Verfahren und Vorrichtung zur Steuerung des Glühvorgangs einer Glühkerze eines Dieselmotors |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0809021B1 (de) |
| ES (1) | ES2237782T3 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007029022A1 (de) * | 2007-06-23 | 2008-12-24 | Beru Ag | Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze |
| EP2177743A2 (de) | 2008-10-18 | 2010-04-21 | MAN Nutzfahrzeuge Aktiengesellschaft | Flammstartanlage und Verfahren zu deren Steuerung |
| US8620512B2 (en) | 2006-09-12 | 2013-12-31 | Markus KERNWEIN | Method for tracking defective functions in operation of motor vehicles |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10162253A1 (de) * | 2001-12-18 | 2003-07-10 | Daimler Chrysler Ag | Glüh- und Ionenstrommeßvorrichtung für einen Dieselmotor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4137885A (en) * | 1977-10-11 | 1979-02-06 | General Motors Corporation | Diesel engine glow plug energization control circuit |
| US4444160A (en) * | 1982-09-09 | 1984-04-24 | General Motors Corporation | Energization indication control for diesel glow plug |
| JPH02149771A (ja) * | 1988-11-30 | 1990-06-08 | Diesel Kiki Co Ltd | 燃焼式ヒータのグロープラグ印加電圧制御装置 |
| US4934349A (en) * | 1987-04-22 | 1990-06-19 | Mitsubishi Denki Kabushiki Kaisha | Glow plug controlling apparatus for a diesel engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2547757B2 (ja) * | 1987-02-27 | 1996-10-23 | 日産自動車株式会社 | デイ−ゼル機関のグロ−制御装置 |
| EP0315934B1 (de) * | 1987-11-09 | 1994-01-19 | Siemens Aktiengesellschaft | Verfahren zur Temperaturregelung von Glühkerzen bei Dieselmotoren und Schaltungsanordnung zur Durchführung des Verfahrens |
| US5144922A (en) * | 1990-11-01 | 1992-09-08 | Southwest Research Institute | Fuel ignition system for compression ignition engines |
| FR2689569B1 (fr) * | 1992-04-07 | 1996-06-14 | Renault | Perfectionnements aux moteurs diesel. |
-
1997
- 1997-05-17 ES ES97108081T patent/ES2237782T3/es not_active Expired - Lifetime
- 1997-05-17 EP EP97108081A patent/EP0809021B1/de not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4137885A (en) * | 1977-10-11 | 1979-02-06 | General Motors Corporation | Diesel engine glow plug energization control circuit |
| US4444160A (en) * | 1982-09-09 | 1984-04-24 | General Motors Corporation | Energization indication control for diesel glow plug |
| US4934349A (en) * | 1987-04-22 | 1990-06-19 | Mitsubishi Denki Kabushiki Kaisha | Glow plug controlling apparatus for a diesel engine |
| JPH02149771A (ja) * | 1988-11-30 | 1990-06-08 | Diesel Kiki Co Ltd | 燃焼式ヒータのグロープラグ印加電圧制御装置 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8620512B2 (en) | 2006-09-12 | 2013-12-31 | Markus KERNWEIN | Method for tracking defective functions in operation of motor vehicles |
| DE102007029022A1 (de) * | 2007-06-23 | 2008-12-24 | Beru Ag | Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze |
| DE102007029022B4 (de) * | 2007-06-23 | 2009-05-14 | Beru Ag | Glühsystem, Steuereinrichtung und Verfahren zur Leistungssteuerung einer Glühkerze |
| EP2177743A2 (de) | 2008-10-18 | 2010-04-21 | MAN Nutzfahrzeuge Aktiengesellschaft | Flammstartanlage und Verfahren zu deren Steuerung |
| DE102008052309A1 (de) | 2008-10-18 | 2010-04-22 | Man Nutzfahrzeuge Aktiengesellschaft | Flammstartanlage und Verfahren zu deren Steuerung |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0809021A3 (de) | 1999-08-04 |
| ES2237782T3 (es) | 2005-08-01 |
| EP0809021A2 (de) | 1997-11-26 |
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