EP0492084B1 - Verfahren zum Aufheizen der Ansaugluft bei Brennkraftmaschinen mittels einer Flammstartanlage - Google Patents

Verfahren zum Aufheizen der Ansaugluft bei Brennkraftmaschinen mittels einer Flammstartanlage Download PDF

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Publication number
EP0492084B1
EP0492084B1 EP91118286A EP91118286A EP0492084B1 EP 0492084 B1 EP0492084 B1 EP 0492084B1 EP 91118286 A EP91118286 A EP 91118286A EP 91118286 A EP91118286 A EP 91118286A EP 0492084 B1 EP0492084 B1 EP 0492084B1
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EP
European Patent Office
Prior art keywords
glow plug
time
preheating
temperature
interval
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
Application number
EP91118286A
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German (de)
English (en)
French (fr)
Other versions
EP0492084A2 (de
EP0492084A3 (en
Inventor
Friedrich Schmid
Andreas Koppitz
Friedrich Hase
Peter Joppig
Roland Klak
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
Mercedes Benz AG
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Publication date
Application filed by Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of EP0492084A2 publication Critical patent/EP0492084A2/de
Publication of EP0492084A3 publication Critical patent/EP0492084A3/de
Application granted granted Critical
Publication of EP0492084B1 publication Critical patent/EP0492084B1/de
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

Definitions

  • the invention relates to a method for heating the intake air in internal combustion engines by means of a flame start system according to the preamble of patent claim 1.
  • the invention also relates to a flame start system with a glow plug for carrying out this method.
  • Such a method is known from DE-A-33 42 865. It is a flame start system in which the air flowing through the intake pipe is preheated to prevent the so-called "white smoke" in the warm-up phase of the internal combustion engine.
  • a combustion chamber is provided in the intake manifold of the internal combustion engine, in which a fuel injection nozzle and a glow plug are arranged.
  • the glow plug is preheated and, after the preheat time has elapsed, when the engine is started, fuel is brought to the fuel injection nozzle via a solenoid valve and thus into the combustion chamber of the flame start system.
  • the fuel igniting in the combustion chamber pre-heats the intake air flowing past and enables the internal combustion engine cylinders to be ignited safely at low outside temperatures.
  • the glow plug is supplied with a steady current for the duration of a certain first period until the motor runs safely, and after this first period has elapsed during a second period until the engine has reached a certain operating temperature, an intermittent current corresponding to a reduced output.
  • a safety time is started, which is ended by a successful start.
  • the current to the glow plug is interrupted for safety purposes and to protect the battery after the safety period has expired and the flame start process is ended and the glow plug cools down.
  • the invention is therefore based on the object to preheat a glow plug taking into account the instantaneous glow plug temperature and the applied voltage in such a way that the temperature required for a repeat start is easily achieved within a narrow tolerance band.
  • the flame start process is ended and the glow plug used in the flame start system cools down.
  • the current glow plug temperature is determined by time measurement and the associated preheating time for a repeat start passed on the control unit of the flame start system.
  • the glow plug temperature is always brought to a defined value required for the repeat start, which is within a permissible tolerance range .
  • Flame start systems for preheating the intake air in internal combustion engines contain one or more glow plugs, which are supplied with power by the vehicle battery.
  • the glow plug or the glow plugs are continuously preheated for a first period of time and the engine can be started. After the first period has elapsed, a surge of current corresponding to a reduced output is supplied to the flame start system for a second period until the engine has reached its operating temperature, and the flame start process is then ended by switching off the current to the glow plug.
  • the flame start system switches off automatically after a safety period and the glow plug cools down.
  • Such a course of cooling is shown in the diagram shown in FIG. 1.
  • ⁇ of the glow plug nominal temperature which according to the diagram is about 1050 ° C, provides the designated 1 curve the course of the cooling of a glow plug over the time t in seconds, which is the glow plug temperature as a function of time ⁇ (t) .
  • the glow plug must be preheated for this repeat start depending on its current temperature.
  • a measure of the instantaneous glow plug temperature ⁇ is given by the cooling time, which can be determined for each type of glow plug used, such as a rod glow plug or flame glow plug, and which is plotted in FIG. 1 in the form of the cooling curve 1 over time t.
  • the preheat time can be shortened correspondingly when the voltage is above its setpoint, while the preheat time is lower than the normal value when the voltage is below the setpoint, as is the case, for example, at low temperatures at which the flame start system is being used.
  • the values once determined for the preheating time at the repeat start can be stored in a simple manner in a map, the control of the flame start system consisting of an electronic control unit which contains a timer for determining the cooling time for the glow plug and which furthermore is in a non-volatile one Map stored in memory for the corresponding values of the preheating time depending of the cooling time, the applied voltage and the type and number of glow plugs used.
  • an electronic control unit which contains a timer for determining the cooling time for the glow plug and which furthermore is in a non-volatile one Map stored in memory for the corresponding values of the preheating time depending of the cooling time, the applied voltage and the type and number of glow plugs used.
  • the use of a programmable microprocessor is expedient for such an electronic control unit.
  • Such a characteristic map is shown by way of example in the table shown in FIG. 2.
  • Shall shown for simplicity here are the values for the preheating time for the repeat start only as a function of the cooling time, that is, the instantaneous glow plug temperature after cooling from the set value ⁇ .
  • the values to be found in the table are only given as examples, without restricting the invention to these values.
  • the number of values to be stored in the map is directly dependent on the fineness of the division of the value range for the applied voltage and the cooling time.
  • the cooling time is broken down into individual intervals, for example as shown in FIG. 1 into the eight intervals t Inter-t1, t1-t2, ..., t7-t8.
  • a certain value for the preheating time is assigned to each time interval, so that exactly 8 different preheating times are also stored at the 8 intervals shown here.
  • the procedure described below can of course also be applied to the first and the second interval, but is not shown in this figure for reasons of clarity.
  • the glow plug cools down to a temperature der2 below the set temperature ⁇ should the glow plug start again. That temperature ⁇ 2 is about 900 ° C in this example. Starting from this temperature, the glow plug is preheated with a predetermined preheating time of about 8 seconds in this example.
  • This preheating time is chosen so that the glow plug temperature, based on its current temperature at the beginning of this interval , does not exceed a predetermined value nach after the preheating time has expired.
  • the length of the interval t2-t3 from here about 4 seconds is chosen such that at the predetermined preheating time of 8 seconds with a repeat start at the end of the interval, that is, directly before the time t3, the glow plug temperature based on its current temperature at this Time, a second predetermined value ⁇ should not fall below min .
  • the predetermined preheating time for the fourth interval beginning at time t3, which extends up to time t4, is again chosen so that the upper limit temperature ⁇ should not exceed max and the lower limit temperature ⁇ should not fall below min .
  • this fourth interval this is achieved in the example shown with an interval length of approximately 8 seconds and an associated preheating time of approximately 10 seconds. In this way it can be achieved that for all intervals of a repeat start with the smallest possible number of stored preheating times, the glow plug temperature is always within a permissible tolerance band between the upper limit temperature hol set , max and the lower limit temperature ⁇ set , min , which are chosen in this way that a repeat start is guaranteed.
  • the intervals can be divided so that - apart from the first and last intervals - the interval duration is selected so that the following interval has an interval duration that is approximately twice as large is like the duration of the previous interval. This is not valid for the first and last intervals because the cooling curve there is extremely steep or extremely flat.
  • FIG. 2 shows the situation known from the diagram in FIG. 1 in tabular form.

Landscapes

  • 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)
EP91118286A 1990-12-22 1991-10-26 Verfahren zum Aufheizen der Ansaugluft bei Brennkraftmaschinen mittels einer Flammstartanlage Expired - Lifetime EP0492084B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4041630A DE4041630A1 (de) 1990-12-22 1990-12-22 Verfahren zum aufheizen der ansaugluft bei brennkraftmaschinen mittels einer flammstartanlage
DE4041630 1990-12-22

Publications (3)

Publication Number Publication Date
EP0492084A2 EP0492084A2 (de) 1992-07-01
EP0492084A3 EP0492084A3 (en) 1993-10-13
EP0492084B1 true EP0492084B1 (de) 1996-01-03

Family

ID=6421332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118286A Expired - Lifetime EP0492084B1 (de) 1990-12-22 1991-10-26 Verfahren zum Aufheizen der Ansaugluft bei Brennkraftmaschinen mittels einer Flammstartanlage

Country Status (4)

Country Link
US (1) US5372102A (enrdf_load_stackoverflow)
EP (1) EP0492084B1 (enrdf_load_stackoverflow)
DE (1) DE4041630A1 (enrdf_load_stackoverflow)
RU (1) RU2092713C1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007031613B4 (de) * 2007-07-06 2011-04-21 Beru Ag Verfahren zum Betreiben von Glühkerzen in Dieselmotoren

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4306900C1 (de) * 1993-03-05 1994-03-31 Daimler Benz Ag Verfahren zum Aufheizen der Ansaugluft bei Brennkraftmaschinen mittels einer Flammanlage
DE19629928A1 (de) * 1996-07-24 1998-01-29 Beru Werk Ruprecht Gmbh Co A Verfahren zum Betreiben einer Flammstartanlage für eine Brennkraftmaschine und Flammstartanlage für eine Brennkraftmaschine
RU2251021C2 (ru) * 2003-03-07 2005-04-27 Тимофеев Виталий Никифорович Система регулирования температуры наддувочного воздуха двигателя внутреннего сгорания
JP4419880B2 (ja) 2005-03-17 2010-02-24 株式会社デンソー グロープラグの通電制御方法及び装置
FR2897656B1 (fr) * 2006-02-23 2011-05-20 Renault Sas Procede et systeme de commande d'une bougie de prechauffage, a alimentation a basse tension electrique, d'un melange air/carburant de moteur diesel
FR2910564B1 (fr) * 2006-12-22 2013-05-10 Renault Sas Procede de pilotage de l'alimentation electrique d'une bougie de pre-chauffage de moteur a combustion interne
GB2464128B (en) * 2008-10-02 2013-07-31 Gm Global Tech Operations Inc Method for controlling a glow plug of a combustion machine of a vehicle and controller for a glow plug of combustion machine of a vehicle
GB2466273B (en) 2008-12-18 2013-01-09 Gm Global Tech Operations Inc A method for controlling glow plugs in a diesel engine particularly for motor-vehicles
DE102010038337A1 (de) * 2010-07-23 2012-01-26 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung des Glühverhaltens einer Glühstiftkerze eines Verbrennungsmotors

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6053798B2 (ja) * 1981-06-10 1985-11-27 株式会社ボッシュオートモーティブ システム グロ−プラグ予熱制御装置
JPS58189375U (ja) * 1982-06-14 1983-12-16 日産自動車株式会社 内燃機関のグロ−プラグ制御装置
JPS5925084A (ja) * 1982-08-02 1984-02-08 Yanmar Diesel Engine Co Ltd デイ−ゼルエンジンの予熱制御装置
JPS5941673A (ja) * 1982-09-01 1984-03-07 Nippon Soken Inc グロ−プラグ制御装置
JPS59138775A (ja) * 1983-01-27 1984-08-09 Toyota Motor Corp デイ−ゼルエンジンの白煙発生防止装置
JPS59153979A (ja) * 1983-02-22 1984-09-01 Nippon Denso Co Ltd 機関予熱制御装置
DE3342865A1 (de) * 1983-11-26 1985-06-05 Daimler-Benz Ag, 7000 Stuttgart Vorrichtung zum aufheizen der gluehkerzen von brennkraftmaschinen
JPS63266172A (ja) * 1987-04-22 1988-11-02 Mitsubishi Electric Corp デイ−ゼルエンジンのグロ−プラグ制御装置
DE3713835A1 (de) * 1987-04-24 1988-11-03 Beru Werk Ruprecht Gmbh Co A Verfahren und vorrichtung zum schnellaufheizen einer elektrischen heizvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007031613B4 (de) * 2007-07-06 2011-04-21 Beru Ag Verfahren zum Betreiben von Glühkerzen in Dieselmotoren

Also Published As

Publication number Publication date
RU2092713C1 (ru) 1997-10-10
DE4041630C2 (enrdf_load_stackoverflow) 1993-01-07
EP0492084A2 (de) 1992-07-01
US5372102A (en) 1994-12-13
EP0492084A3 (en) 1993-10-13
DE4041630A1 (de) 1992-07-02

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