EP0315034A2 - Méthode et dispositif de réglage de température d'une bougie à incandescence - Google Patents

Méthode et dispositif de réglage de température d'une bougie à incandescence Download PDF

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Publication number
EP0315034A2
EP0315034A2 EP88117800A EP88117800A EP0315034A2 EP 0315034 A2 EP0315034 A2 EP 0315034A2 EP 88117800 A EP88117800 A EP 88117800A EP 88117800 A EP88117800 A EP 88117800A EP 0315034 A2 EP0315034 A2 EP 0315034A2
Authority
EP
European Patent Office
Prior art keywords
temperature
controller
variable
controllers
control
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.)
Granted
Application number
EP88117800A
Other languages
German (de)
English (en)
Other versions
EP0315034B1 (fr
EP0315034A3 (en
Inventor
Hans-Peter Dr. Dipl.-Phys. Bauer
Wolf Wessel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0315034A2 publication Critical patent/EP0315034A2/fr
Publication of EP0315034A3 publication Critical patent/EP0315034A3/de
Application granted granted Critical
Publication of EP0315034B1 publication Critical patent/EP0315034B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1418—Several control loops, either as alternatives or simultaneous
    • F02D2041/1419—Several control loops, either as alternatives or simultaneous the control loops being cascaded, i.e. being placed in series or nested

Definitions

  • the invention is based on a method for regulating the temperature, in particular of glow plugs, and on a device according to the category of claim 10.
  • glow plugs which have both a heating coil and a control coil.
  • the disadvantage of these methods and devices is that the start of a self-igniting internal combustion engine is delayed in that the temperature of the glow plug required for starting is not reached quickly enough.
  • the method and the device according to the invention with the features mentioned in the main claim and claim 10 have the advantage that the glow plugs are brought to high temperatures very quickly without heating their heating element and thus destroying them.
  • the method is particularly reliable in that the temperature of the heating coil is used as a separate control variable, a maximum value of the coil temperature being specified to protect the coil from thermal overload.
  • the surface temperature of the glow plug is also taken into account in the control, so that there is a superimposition of two controls, namely the control of the coil temperature and that of the surface temperature.
  • An embodiment is particularly preferred in which the engine operating state is applied as a disturbance variable for regulating the glow plug temperature after starting, that is to say during engine self-running. This makes it possible to use the method and the device according to the invention also in the after-glow and intermediate glow.
  • the measures listed in the subclaims permit advantageous improvements to the method specified in the main claim and to the device according to claim 10. It is particularly advantageous that the method is independent of whether the coil temperature and the surface temperature are determined directly or obtained from model considerations.
  • glow plugs which have no control coil and whose heating coil is designed, for example, as a metal wire coil, the operating voltage of which is 5 V far below that usual supply or vehicle electrical system voltage of 12 V.
  • the glow plug can be heated up particularly quickly even under unfavorable conditions, for example in the cold and weak electrical system voltage. Due to the method or the device, thermal overload of the heating coil is excluded.
  • the method and the device of the type mentioned are suitable for regulating the temperature of electrically heated elements. They are to be described here using the example of regulating the temperature of a glow plug in a self-igniting internal combustion engine.
  • a glow plug 1 part of a glow plug 1 is shown schematically in section. It is the filament 2 serving as a heating element that is made of insulation material 3, e.g. Ceramic filling of the glow plug and its jacket 4 reproduced.
  • insulation material 3 e.g. Ceramic filling of the glow plug and its jacket 4 reproduced.
  • the electrical energy fed in is converted into heat in the incandescent filament 2. From the surface of the filament, the heat flows through the insulation material 3 to the inside of the jacket 4, which is designed as a glow tube, and from there to the surface of the glow plug, where the surface temperature of the glow plug then changes due to the balance between heat supplied from the inside and radiated heat to the outside results.
  • the glow plug can be dynamically simplified by the series connection of delay lines: the filament 2 with the core, the insulation material 3 between the incandescent filament and the jacket 4 and the jacket represent first-order delay lines.
  • the delay lines which represent the heat transport through the insulation material and the jacket, are combined to form a second-order delay element, so that two Blocks result.
  • the output variable A of the first block represents the filament temperature
  • the output variable B of the second block the surface temperature of the glow plug.
  • the heating power is defined as the input variable and not the vehicle electrical system voltage applied to the glow plug, the current fed in or a duty cycle selected when the glow plug was activated.
  • a temperature-dependent material can therefore be selected as the heating coil, so that the coil temperature defined as controlled variable A can be obtained directly by determining the coil resistance.
  • the surface temperature of the glow plug defined as control variable B can also be measured directly via temperature sensors provided on the surface of the jacket.
  • both variables can be determined using models or using computer programs, so that temperature-independent materials can also be used for the heating coil and the temperature sensors for determining the surface temperature can be dispensed with.
  • Figure 2 shows a first control method in which the desired control characteristics by specifying the coil temperature as a target value T to be achieved.
  • the second controller R2 can have P, I and / or D components or can be designed digitally, that is to say perform a control according to algorithms. It is used to control the filament temperature A.
  • the setpoint given to controller R2 is determined by a minimum value selection in a minimum value selection circuit 5, the smaller value being selected between the fixed maximum temperature T Wmax of the coil temperature and the manipulated variable of controller R1.
  • controller R1 When the glow plug is switched on during the start-up phase, controller R1 will want to force rapid heating up due to the cold surface of the glow plug and generate the largest possible manipulated variable. If this manipulated variable specifies a larger value than the maximum permissible coil temperature, controller R2 will only receive the setpoint T Wmax , which corresponds to the maximum coil temperature , due to the minimum value selection. In this case, the regulator R2 regulates the maximum filament temperature and thus ensures that the glow plug heats up as quickly as possible without thermal overloading of the heating filament being possible.
  • the first controller R1 will reduce the manipulated variable at its output and set it to a value below the maximum permissible coil temperature in order to regulate the desired surface temperature of the glow plug.
  • two controllers R1 and R2 are also provided. However, they have equal rights. Each of the controllers tries to adjust the setpoint assigned to it, the first controller R1 the surface temperature B, the second controller R2 the filament temperature A. The manipulated variables of both controllers are additively superimposed. The manipulated variable output of controllers R1, R2 is limited to a defined upper maximum stop. The setpoint of the first controller R1 is reached by specifying the desired surface temperature Tset , the current surface temperature being subtracted from the setpoint. Similarly, the setpoint of the second controller R2 is set by the current coil temperature, from which the maximum coil temperature T Wmax is subtracted.
  • the manipulated variable of the first controller R1 goes to the upper maximum stop.
  • the manipulated variable of the second controller R2 then assumes such a value that the maximum coil temperature T Wmax is not exceeded.
  • the manipulated variable of the second controller R2 reaches its upper defined maximum stop, from which the first controller R1 can subtract such a value that the desired surface temperature B is reached.
  • FIG. 4 A third embodiment is shown in FIG. 4. It corresponds to the second embodiment according to FIG. 3, in that two equal controllers R1 and R2 are also provided here.
  • the setpoints of the controllers are specified as in the control method described with reference to FIG. 3.
  • the controlled variables of however, both controllers are subjected to a minimum value selection in which the smaller of the manipulated variables for controlling the coil temperature A and the surface temperature B is selected.
  • the manipulated variable of the second controller R2 is selected when the minimum value is selected, which prevents the maximum permissible temperature of the filament from being exceeded.
  • the manipulated variable of the first controller R1 which regulates a coil temperature below the maximum maximum temperature T Wmax for the desired surface temperature, is preferred. It can be seen, therefore, that due to the minimum value selection, it is not necessary to specify defined upper maximum stops for the manipulated variables of the controllers.
  • one of the three described embodiments is selected, depending on which control dynamics or which interference behavior is desired.
  • control sections representing the glow plugs in FIGS. 2 to 6 are preceded by a control block P / E, which takes into account the quadratic effects of voltage or current, in order to linearize the temperature control process.
  • the "electrical control variable" E is obtained from the linear manipulated variable "power" P. If, for example, the glow plug is triggered with a pulse length t and a period T p and the vehicle electrical system voltage changes, then the pulse length t or the pulse duty factor t / T p ⁇ 1 / U2 is changed according to the relationship p ⁇ U2 by a constant heating power to achieve. This change takes place arithmetically or with the aid of a circuit in the control block P / E.
  • FIGS. 2 to 4 allow the candle temperature to be controlled only for the starting case in which the engine is not running independently.
  • a predetermined temperature of the glow plug is to be adjusted even when the internal combustion engine is running, then it must be taken into account that additional heat is withdrawn or supplied depending on the engine operating state: when the fuel injection quantity is low, heat is withdrawn, when the injection quantity is high or heat is added at high speeds.
  • the operating state of the internal combustion engine can be taken into account in all control methods by using known engine data, e.g. an electrical signal corresponding to the operating state and at a suitable point is entered as disturbance variable S from the injection quantity or the speed.
  • FIGS. 5 and 6 show two possibilities for applying the disturbance variable S. These two possibilities are possible for all three embodiments of the regulation.
  • the disturbance variable S is applied at the output of the second block and in FIG. 6 is entered as an additional setpoint for the first block.
EP19880117800 1987-11-06 1988-10-26 Méthode et dispositif de réglage de température d'une bougie à incandescence Expired - Lifetime EP0315034B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3737745 1987-11-06
DE19873737745 DE3737745A1 (de) 1987-11-06 1987-11-06 Verfahren und vorrichtung zur regelung der temperatur insbesondere von gluehkerzen

Publications (3)

Publication Number Publication Date
EP0315034A2 true EP0315034A2 (fr) 1989-05-10
EP0315034A3 EP0315034A3 (en) 1989-09-20
EP0315034B1 EP0315034B1 (fr) 1991-09-04

Family

ID=6339963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880117800 Expired - Lifetime EP0315034B1 (fr) 1987-11-06 1988-10-26 Méthode et dispositif de réglage de température d'une bougie à incandescence

Country Status (3)

Country Link
EP (1) EP0315034B1 (fr)
JP (1) JP2796318B2 (fr)
DE (2) DE3737745A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013060594A1 (fr) * 2011-10-28 2013-05-02 Robert Bosch Gmbh Procédé et dispositif permettant de déterminer la température de surface d'une bougie-crayon de préchauffage dans un moteur à combustion interne
EP2479422A3 (fr) * 2011-01-12 2015-03-11 Bosch Corporation Procédé d'évaluation de la température de point de bougie de préchauffage et dispositif de contrôle de commande de bougie de préchauffage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708430A1 (de) * 1996-05-21 1997-11-27 Stribel Gmbh Verfahren und Vorrichtung zur Steuerung des Glühvorgangs einer Glühkerze eines Dieselmotors
DE102006010194B4 (de) * 2005-09-09 2011-06-09 Beru Ag Verfahren und Vorrichtung zum Betreiben der Glühkerzen einer selbstzündenden Brennkraftmaschine
DE102006060632A1 (de) * 2006-12-21 2008-06-26 Robert Bosch Gmbh Verfahren zur Regelung der Temperatur einer Glühkerze einer Brennkraftmaschine
DE102009047650B4 (de) * 2009-11-12 2022-10-06 Robert Bosch Gmbh Verfahren und Vorrichtung zur Bestimmung einer Temperatur einer Glühstiftkerze in einem Verbrennungsmotor
DE102010011044B4 (de) 2010-03-11 2012-12-27 Borgwarner Beru Systems Gmbh Verfahren zum Regeln einer Glühkerze

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2822760A1 (de) * 1977-05-24 1978-12-14 Isuzu Motors Ltd Einrichtung zum unterstuetzen des anlassens eines motors
DE2743788A1 (de) * 1977-09-29 1979-04-12 Volkswagenwerk Ag Anordnung zur ansteuerung von gluehkerzen einer brennkraftmaschine
EP0035407A2 (fr) * 1980-03-03 1981-09-09 Mitsubishi Denki Kabushiki Kaisha Dispositif de commande de bougies à incandescence pour moteur Diesel
WO1982002745A1 (fr) * 1981-01-30 1982-08-19 Andreasson Jan Yngve Nils Systeme d'allumage
EP0069533A2 (fr) * 1981-06-30 1983-01-12 Isuzu Motors Limited Circuit de chauffage rapide pour bougie à incandescence

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS578360A (en) * 1980-06-19 1982-01-16 Diesel Kiki Co Ltd Glow plug preheating controller
YU115584A (en) * 1984-07-02 1987-06-30 Iskra Sozd Elektro Indus Circuit for automatic controlled glowing device
DE3433367A1 (de) * 1984-09-12 1986-03-20 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zur steuerung der energiezufuhr zu einer heissen stelle
JPS6287670A (ja) * 1985-10-11 1987-04-22 Nippon Denso Co Ltd グロ−プラグ制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2822760A1 (de) * 1977-05-24 1978-12-14 Isuzu Motors Ltd Einrichtung zum unterstuetzen des anlassens eines motors
DE2743788A1 (de) * 1977-09-29 1979-04-12 Volkswagenwerk Ag Anordnung zur ansteuerung von gluehkerzen einer brennkraftmaschine
EP0035407A2 (fr) * 1980-03-03 1981-09-09 Mitsubishi Denki Kabushiki Kaisha Dispositif de commande de bougies à incandescence pour moteur Diesel
WO1982002745A1 (fr) * 1981-01-30 1982-08-19 Andreasson Jan Yngve Nils Systeme d'allumage
EP0069533A2 (fr) * 1981-06-30 1983-01-12 Isuzu Motors Limited Circuit de chauffage rapide pour bougie à incandescence

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2479422A3 (fr) * 2011-01-12 2015-03-11 Bosch Corporation Procédé d'évaluation de la température de point de bougie de préchauffage et dispositif de contrôle de commande de bougie de préchauffage
US9255564B2 (en) 2011-01-12 2016-02-09 Bosch Corporation Glow plug tip temperature estimating method and glow plug drive control device
WO2013060594A1 (fr) * 2011-10-28 2013-05-02 Robert Bosch Gmbh Procédé et dispositif permettant de déterminer la température de surface d'une bougie-crayon de préchauffage dans un moteur à combustion interne

Also Published As

Publication number Publication date
DE3864662D1 (de) 1991-10-10
EP0315034B1 (fr) 1991-09-04
JP2796318B2 (ja) 1998-09-10
DE3737745A1 (de) 1989-05-18
JPH01151778A (ja) 1989-06-14
EP0315034A3 (en) 1989-09-20

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