EP2258939B1 - Verfahren zur Regelung der Temperatur einer Glühkerze - Google Patents

Verfahren zur Regelung der Temperatur einer Glühkerze Download PDF

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Publication number
EP2258939B1
EP2258939B1 EP10003958.5A EP10003958A EP2258939B1 EP 2258939 B1 EP2258939 B1 EP 2258939B1 EP 10003958 A EP10003958 A EP 10003958A EP 2258939 B1 EP2258939 B1 EP 2258939B1
Authority
EP
European Patent Office
Prior art keywords
value
variable
error signal
eff
effective voltage
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.)
Not-in-force
Application number
EP10003958.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2258939A3 (de
EP2258939A2 (de
Inventor
Ismet Demirdelen
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.)
BorgWarner Ludwigsburg GmbH
Original Assignee
BorgWarner Ludwigsburg GmbH
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Filing date
Publication date
Application filed by BorgWarner Ludwigsburg GmbH filed Critical BorgWarner Ludwigsburg GmbH
Publication of EP2258939A2 publication Critical patent/EP2258939A2/de
Publication of EP2258939A3 publication Critical patent/EP2258939A3/de
Application granted granted Critical
Publication of EP2258939B1 publication Critical patent/EP2258939B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02D2041/1415—Controller structures or design using a state feedback or a state space representation
    • F02D2041/1416—Observer
    • 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
    • F02P19/021—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 characterised by power delivery controls
    • F02P19/022—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 characterised by power delivery controls using intermittent current supply

Definitions

  • the invention relates to a method for controlling the temperature of a glow plug, wherein from a setpoint temperature a desired value of a temperature-dependent electrical variable is determined and an effective voltage generated by pulse width modulation is used as a manipulated variable.
  • the electric resistance or, which is equivalent, the electrical conductivity is usually used as the setpoint.
  • other temperature-dependent electrical variables for example the inductance, can also be used instead of the electrical resistance or the electrical conductivity.
  • Such a temperature control discloses, for example, the EP1936183 ,
  • the object of the invention is to show a way how to quickly regulate the temperature of a glow plug with the engine running to a target value.
  • a desired value of a temperature-dependent electrical variable is not compared with an actual value, as in conventional PID control methods, and the effective voltage is changed as a function of the instantaneous and possibly a preceding deviation.
  • a mathematical model of the glow plug is used, with which an expected value of the electrical quantity is calculated. This model is fed back with the controlled system containing the glow plug, d. H. a change in the manipulated variable is made to reach the desired setpoint temperature or the desired setpoint value as a function of the result of a comparison on the basis of the output quantity of the model and the setpoint value.
  • the feedback required for a control therefore takes place via the output of the mathematical model at which the output variable provided by the model is provided.
  • an error signal is generated from which an input variable is calculated together with the value of the effective voltage for the mathematical model. From this input, the mathematical model calculates an output that specifies the expected value of the electrical quantity.
  • the output variable of the model can be the expected value of the electrical variable or merely predetermine the latter, so that the expected value is determined by a further calculation step from the output variable, for example by a multiplication by a constant factor.
  • the comparison to be made based on the output and the setpoint may be performed by comparing values calculated from the setpoint and the output, such as voltage values, or by comparing the setpoint immediately with the expected value.
  • the error signal corrects any modeling errors. Without external influences, i. Therefore, after a period of time whose duration depends on the precision of the mathematical model, the calculated value finally coincides with the measured value. If faults in the candle temperature occur, this leads to a deviation of the calculated size from the measured size. Since the input of the mathematical model depends on both the calculated and measured values, such as the difference between the measured and calculated values, the mathematical model follows the glow plug, i.e., the glow plug. the calculated value approaches the measured value even when disturbances occur.
  • a control method By a control method according to the invention, defects in the candle temperature can be corrected much faster than is possible with conventional control methods.
  • the change in the manipulated variable depends not only on the instantaneous deviation between the actual value and the setpoint, but also on previous deviations (I or D component). Disturbances, however, generally have nothing to do with previous deviations, so that the consideration of previous deviations in the treatment of disorders often does not help.
  • a pure proportional control can not achieve good results, since the characteristic properties of a system can be detected only poorly.
  • a control method according to the invention allows an efficient and rapid temperature control in the event of a fault as well as in the occurrence of disturbances.
  • the mathematical model used to calculate an expected value of the electrical quantity may be formulated as a linear differential equation.
  • the mathematical model contains only two parameters that are characteristic of a given glow plug and its installation environment. The first constant is used to weight the current value of the variable to be calculated, and the second variable to weight the manipulated variable, ie the effective voltage.
  • the electrical resistance or, which is synonymous, the temperature-dependent electrical variable is preferred electrical conductivity used.
  • the electrical resistance or the electrical conductivity of the glow plug including leads can be used.
  • the electrical resistance or the conductivity of the glow plug without contributions from supply lines are taken into account.
  • the inductance can also be used as a temperature-dependent electrical variable.
  • a second error signal is generated by evaluating the calculated value, which is used to correct the setpoint value of the electrical variable, for example, the desired resistance.
  • a fault can be compensated for particularly effectively and the desired setpoint temperature can be reached particularly quickly. If, for example, the fault leads to additional heating of the glow plug, ie an increase in temperature, the desired setpoint temperature can be reached more quickly by assuming a slightly lower setpoint value when converting the setpoint value into a value of the effective voltage. In this way, the additional energy input of a disturbance can be compensated by a lower heating power.
  • the correction of the setpoint value can be determined, for example, using a characteristic map, from which a selection is made taking into account the second error signal and the setpoint temperature or a setpoint determined from the setpoint temperature. With the second error signal so a second feedback is made.
  • This second feedback leads to two control loops being present in the method, each of which contains a controlled system containing the glow plug.
  • a first control loop is created by the feedback of the output of the mathematical model.
  • a second loop through the feedback of the second error signal.
  • the second error signal can be generated by comparing the calculated value with the measured value, for example by subtraction, so that the second error signal is proportional to the difference between the two calculated values.
  • the second error signal by using a further mathematical model of the glow plug, the input value of the further mathematical model being the value of the rms voltage applied to the glow plug, and the second error signal being used by comparing the output variables of the two models is produced.
  • the input of the first model depends on both the rms voltage and the measured value, while in the second model the input depends only on the rms voltage.
  • the two mathematical models are preferably identical, that is, they perform the same arithmetic operations on an input variable.
  • the present invention further relates to a glow plug control device, which performs in operation a method according to the invention.
  • a glow plug control device can be realized, for example, with a memory and a control unit, for example a microprocessor, wherein a program is stored in the memory, which carries out the method according to the invention during operation.
  • the hardware components of such a glow plug control device may be identical to the hardware of commercially available glow plug control devices.
  • FIG. 1 the sequence of a method for controlling the temperature of a glow plug 1 is shown schematically.
  • an effective voltage U eff generated by pulse width modulation from an on-board voltage of a vehicle is used as the manipulated variable.
  • the electrical resistance R e of the glow plug 1 is used in the illustrated embodiment, wherein for the control method in principle any other temperature-dependent electrical variable or a vector with multiple sizes can be used.
  • a target value R Scoll the electrical resistance of the glow plug for example by means of a map 2.
  • a value of the effective voltage U eff is then determined that the glow plug 1 is created.
  • the conversion of the setpoint R Soll into a value for the effective voltage U eff can be carried out, for example, by means of a prefilter 3 or a characteristic curve.
  • an expected value R e of the electrical resistance is calculated from the effective voltage U eff applied to the glow plug 1.
  • the mathematical model 4 can provide as output directly the expected value.
  • the model 4 provides an output X from which the expected value R e of the electrical quantity is calculated in a further step 4a, preferably by multiplication by a constant.
  • a first error signal e 1 (t) is generated in a method step 5.
  • the calculated value R e is compared with a measured value R m of the resistance.
  • the calculated resistance value R e are subtracted, for example, from the measured Widertandswert R m, as shown in Fig. 1 indicated by the minus sign (-).
  • the result of such difference formation may be weighted by an appropriate factor that may be empirically determined so that the first error signal e 1 (t) is proportional to the difference between the measured resistance R m and the calculated resistance R e .
  • the input value of the mathematical model 4 is a value calculated from the value of the effective voltage U e ff and the first error signal e 1 (t).
  • Such a mathematical model 4 the input quantity of which depends on a comparison between a calculated and a measured value, is called Luenberger observer.
  • a corrected value for the effective voltage U eff is calculated and the effective voltage U eff is changed to the corrected value. If the output X is also the expected value R e , the output can be compared directly with the target value R Soll and the effective voltage U eff can be changed according to the result of the comparison, for example proportional to the difference. Generally speaking, it is sufficient to couple the output of the model 4 with an input of a controller, that is, to carry out a feedback of the model output.
  • a resistance value or a voltage value is first calculated from the output quantity X in a method step 6, which can be called a state regulator or feedback matrix Setpoint value R setpoint or a variable determined from the setpoint value R setpoint , namely the actual effective voltage U eff , is compared. According to the result of this comparison, the effective voltage U eff is changed. Preferably, a voltage value is added to the instantaneous value of the effective voltage (U eff ) which is proportional to the difference between the desired value R Soll and the calculated value R e .
  • the comparison and the change in the effective voltage U eff in dependence on the difference determined thereby are in FIG. 1 shown as process step 7.
  • a second error signal e 2 (t) is determined, which is used to correct the setpoint R Soll .
  • the target value R is determined from the target temperature T target predetermined together with the second error signal E 2 (t) used to determine an adjusted desired value, for example by means of a characteristic field 8.
  • a correction of the desired value is determined here R target and this for Calculation to the setpoint R Soll added as in FIG. 1 is indicated by the method step 9.
  • the corrected setpoint value is subsequently converted into a value for the effective voltage U eff , for example by means of a prefilter 3 or a characteristic curve. If appropriate, the value of the effective voltage U eff determined in this way is adapted in method step 7 taking into account the output quantity X.
  • a differential equation in particular a linear differential equation can be used.
  • the calculation of a voltage value from the output variable X of the model 4 can be determined, for example, by multiplication with a constant whose value can be determined by trial and error.
  • the second error signal e 2 (t) is in the illustrated embodiment similar to the first error signal e 1 (t) determined by comparing the measured value with the calculated value, for example by subtraction and multiplication of the difference with a weighting factor.
  • the control method according to the invention comprises per se two control circuits.
  • a first control circuit includes the glow plug 1 and the model 4, shown in the In the exemplary embodiment, this first control loop contains the glow plug 1, the method step 5, the model 4 and the method steps 6 and 7.
  • a second control loop contains the glow plug 1 and the feedback of the second error signal.
  • FIG. 2 shows another embodiment of a method for controlling the temperature of a glow plug 1.
  • This method differs from the above with reference to FIG. 1 method explained in the first place by the fact that U eff an output X2 is calculated from the value of the voltage applied to the glow plug 1 effective voltage with a further mathematical model 10 of the glow plug. 1
  • the calculation rules of the two models 4, 10 can be identical. However, in the case of the second model 10, the effective voltage U eff applied to the glow plug is used directly as the input variable, while in the first model the input variable is calculated from the first error signal e 1 (t) and the effective voltage U eff .
  • the second error signal e 2 (t) is applied to the in FIG. 2 illustrated embodiment by comparing the output variables X, X2 of the two models 4, 10 determined, for example by subtraction, as shown in FIG. 2 is indicated.
  • the difference can be multiplied by a constant factor to calculate the second error signal e 2 (t).
  • the second error signal e 2 (t) is therefore in the second embodiment of the difference between the two output variables X, X2.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feedback Control In General (AREA)
  • Control Of Resistance Heating (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Temperature (AREA)
EP10003958.5A 2009-06-04 2010-04-15 Verfahren zur Regelung der Temperatur einer Glühkerze Not-in-force EP2258939B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910024138 DE102009024138B4 (de) 2009-06-04 2009-06-04 Verfahren zur Regelung der Temperatur einer Glühkerze

Publications (3)

Publication Number Publication Date
EP2258939A2 EP2258939A2 (de) 2010-12-08
EP2258939A3 EP2258939A3 (de) 2015-09-16
EP2258939B1 true EP2258939B1 (de) 2016-07-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10003958.5A Not-in-force EP2258939B1 (de) 2009-06-04 2010-04-15 Verfahren zur Regelung der Temperatur einer Glühkerze

Country Status (5)

Country Link
US (1) US8972075B2 (ko)
EP (1) EP2258939B1 (ko)
JP (1) JP5779320B2 (ko)
KR (1) KR101694688B1 (ko)
DE (1) DE102009024138B4 (ko)

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TW470818B (en) 2000-05-18 2002-01-01 Thk Co Ltd Spherical bearing and method for manufacturing the same
EP2123901B1 (en) 2008-05-21 2013-08-28 GM Global Technology Operations LLC A method for controlling the operation of a glow-plug in a diesel engine
JP5660612B2 (ja) * 2011-01-12 2015-01-28 ボッシュ株式会社 グロープラグ先端温度推定方法及びグロープラグ駆動制御装置
DE102011004514A1 (de) * 2011-02-22 2012-08-23 Robert Bosch Gmbh Verfahren und Steuergerät zur Einstellung einer Temperatur einer Glühstiftkerze
WO2012157595A1 (ja) * 2011-05-19 2012-11-22 ボッシュ株式会社 グロープラグの駆動制御方法及びグロープラグ駆動制御装置
DE102011086445A1 (de) * 2011-11-16 2013-05-16 Robert Bosch Gmbh Verfahren und Vorrichtung zur Regelung der Temperatur einer Glühstiftkerze in einer Brennkraftmaschine
DE102011087989A1 (de) * 2011-12-08 2013-06-13 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ansteuerung einer Glühstiftkerze in einer Brennkraftmaschine
FR2987405B1 (fr) * 2012-02-23 2014-04-18 Peugeot Citroen Automobiles Sa Architecture modulaire de controle-commande de bougies de pre/post chauffage
DE102012105376B4 (de) * 2012-03-09 2015-03-05 Borgwarner Ludwigsburg Gmbh Verfahren zum Regeln der Temperatur einer Glühkerze
DE102012102005B3 (de) 2012-03-09 2013-05-23 Borgwarner Beru Systems Gmbh Verfahren zum Regeln der Temperatur einer Glühkerze
GB2505915A (en) * 2012-09-14 2014-03-19 Gm Global Tech Operations Inc Control method comprising correction of a feed forward engine control
DE102015000845A1 (de) * 2015-01-27 2016-07-28 W.O.M. World Of Medicine Gmbh Verfahren und Vorrichtung zur Regelung der Temperatur des Gasstroms bei medizintechnischen Vorrichtungen
DE102017109071B4 (de) * 2017-04-27 2022-10-20 Borgwarner Ludwigsburg Gmbh Verfahren zum Regeln der Temperatur von Glühkerzen

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EP2123901B1 (en) * 2008-05-21 2013-08-28 GM Global Technology Operations LLC A method for controlling the operation of a glow-plug in a diesel engine
EP2123902B1 (en) * 2008-05-21 2011-10-12 GM Global Technology Operations LLC A method and an apparatus for controlling glow plugs in a diesel engine, particularly for motor-vehicles
JP4956486B2 (ja) * 2008-05-30 2012-06-20 日本特殊陶業株式会社 グロープラグ通電制御装置及びグロープラグ通電制御システム

Also Published As

Publication number Publication date
DE102009024138A1 (de) 2010-12-16
KR101694688B1 (ko) 2017-01-10
KR20100130948A (ko) 2010-12-14
US8972075B2 (en) 2015-03-03
JP2010281315A (ja) 2010-12-16
EP2258939A3 (de) 2015-09-16
JP5779320B2 (ja) 2015-09-16
US20100312416A1 (en) 2010-12-09
DE102009024138B4 (de) 2012-02-02
EP2258939A2 (de) 2010-12-08

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