EP1948925A1 - Unité à bougie-crayon de préchauffage et système de commande d une pluralité de bougies-crayons de préchauffage - Google Patents

Unité à bougie-crayon de préchauffage et système de commande d une pluralité de bougies-crayons de préchauffage

Info

Publication number
EP1948925A1
EP1948925A1 EP06807279A EP06807279A EP1948925A1 EP 1948925 A1 EP1948925 A1 EP 1948925A1 EP 06807279 A EP06807279 A EP 06807279A EP 06807279 A EP06807279 A EP 06807279A EP 1948925 A1 EP1948925 A1 EP 1948925A1
Authority
EP
European Patent Office
Prior art keywords
glow plug
unit
glow
control line
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.)
Withdrawn
Application number
EP06807279A
Other languages
German (de)
English (en)
Inventor
Rainer Moritz
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
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1948925A1 publication Critical patent/EP1948925A1/fr
Withdrawn legal-status Critical Current

Links

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

Definitions

  • the invention relates to a glow plug assembly with an input for connecting the glow plug assembly to a control line, via which a glow plug of the glow plug assembly can be controlled.
  • the invention further relates to a system for operating a plurality of glow plugs, with a central glow time control device and with at least two glow plugs each having a glow plug.
  • the invention also relates to a method for operating a plurality of glow plug assemblies, each glow plug assembly each having a glow plug, and wherein a central glow timing control device is provided for controlling the glow plug assemblies.
  • a further disadvantage of conventional devices is that the central glow time control device requires a large number of connector pins and accordingly complex and expensive plug connectors in order to be able to be connected to each individual glow plug or glow plug unit.
  • the glow plug unit has an output through which at least one more Glühtkerzenech is connected to the control line bar.
  • the inventive design of the glow plug assembly with an input and an output allows in contrast to conventional systems a series connection of multiple glow plug and thus less cabling than, for example, in star topology around a central Glühzeit Kunststoff réelle arranged Glühtkerzenechen. This reduces the number of connector pins on the Glühzeit Kunststoff ceremony.
  • FIG. 1 shows a block diagram of an embodiment of a system according to the invention
  • FIG. 2 shows a block diagram of an embodiment of a glow plug cartridge according to the invention
  • FIG. 3 a shows a first embodiment of a position evaluation unit according to the invention
  • FIG. 3b shows a second embodiment of a position evaluation unit according to the invention
  • FIG. 4 shows another embodiment of the present invention
  • FIG. 5 shows a flow chart of a first embodiment of the method according to the invention.
  • FIG. 1 shows a simplified block diagram of a first embodiment of a system 100 according to the invention, which has a central glow time control device 110 and a plurality of glow plug assemblies 120a, 120b.
  • the system 100 is used for example in motor vehicles with self-igniting internal combustion engines in order to preheat the combustion chambers of different cylinders of the internal combustion engine by means of glow plugs provided in the individual glow plug assemblies 120a, 120b and not shown in detail in FIG.
  • the central glow time control unit 110 only the first of a plurality of glow plug units 120a, 120b is connected directly to the central glow time control unit 110. As shown in FIG. 1, further glow plug assemblies 120b, .. are connected in series with the first glow plug assembly 120a. In this way, in the system 100 according to the invention, the cabling expenditure in the region of the central glow time control device 110 is reduced. Furthermore, only a single plug pin is required in the central glow time control device 110 for connecting a multiplicity of glow plug assemblies 120a, 120b,... According to the invention.
  • FIG. 2 shows a block diagram of an embodiment of a glow plug assembly 120 according to the invention.
  • the glow plug assemblies 120a, 120b shown in FIG. 1 have the same structure, for example.
  • the glow plug unit 120 has an input 10 and an output 20. Via the input 10, the glow plug unit 120 can be connected, for example, directly to the control line 110a issuing from the central glow time control device 110, while the output 20 of the glow plug unit 120 is connected to an input 10 of another glow plug unit 120, for example via a further section 110b (FIG. the control line HOa, HOb, HOc.
  • the control line HOa connected to the input 10 of the first glow plug unit 120a (FIG. 1) can be looped through the first glow plug unit 120a and thus downstream glow plug units 120b, Will be provided.
  • the connection of the input 10 to the output 20 may, for example, by appropriate switch (not shown), which are preferably formed as a low-resistance semiconductor switch done.
  • the further glow plug units 120b, .. can determine in the same way whether the control line HOb, HOc, .. is looped through to a respective subsequent Glühwkerzenech, whereby in each case a corresponding transmission of drive signals, for example, emanating from the central Glühzeit Kunststoff Kunststoff HO possible.
  • the glow plug assembly 120 according to the invention (FIG. 2) has a local control unit 40 which is preferably designed as a microcontroller or as an application-specific integrated circuit, ASIC. is formed.
  • the local control unit 40 further serves to evaluate drive signals which are output by the central glow time control device 110 via the control line 110a, 110b, 110c to the glow plug units 120a, 120b,.
  • the glow plug unit 120 has a communication unit, not shown, for example, a voltage level between the control line 110a, 110b, 110c and a reference potential such. B. evaluates the ground potential, are coded with the corresponding address signals and control signals from the central annealing timing control unit 110. In the same way, i. z. B. by a Massetastung, and the communication unit of the glow plug unit 120 can generate signals and transmitted via the control line 110a, 110b, 110c.
  • the glow plugs unit 120 In order for the glow plugs unit 120 according to the invention to know its address coding, it is necessary for it to be able to recognize its position within a series connection of several glow plug units 120a, 120b,... (FIG. 1). For this purpose, it is equipped with a position evaluation unit, which is designated in the block diagram of Figure 2 by the reference numeral 30.
  • the position evaluation unit 30 has at least one resistive and / or inductive component which can be switched between the input 10 and the output 20 during the process of determining the position. This results between the input 10 of the first glow plug unit 120a and the output of the last glow plug unit, which is preferably connected to the ground potential during the position determination, a voltage divider arrangement, which consists of the series connection of the resistive or inductive EIe- elements of the respective Glühmannkerzenillonen 120.
  • a simple ohmic voltage divider and in the formation of all ohmic resistors with the same resistance can be determined by a determination of the voltage between the input 10 and the output 20 and the ground potential by applying the voltage divider rule to the position of the respective glow plug unit 120 within the series circuit getting closed.
  • FIG. 3a shows a position evaluation unit 30 which has an ohmic resistance R which can be switched by means of the switches 15a, 15b between the input 10 and the output 20 of the glow plug assembly 120 (FIG. 2).
  • voltage measuring means V are also provided which measure a potential difference between the left-hand terminal of the ohmic resistance R in FIG. 3a and a ground potential (not shown).
  • the switches 15a, 15b are opened and assume the state depicted in FIG. 3a.
  • the switches 15a, 15b can advantageously be designed as semiconductor switches, in particular as field-effect transistors.
  • the semiconductor switch is preferably formed as a field effect transistor and allows by appropriate control z.
  • the replica of the extra in the embodiment of Figure 3a provided Ohm resistor R by its own drain-source resistor, which adjusts itself between its drain electrode and its source electrode. That is, in this case, the field effect transistor simultaneously realizes the functionality of the switches 15a, 15b (FIG. 3a) for connecting the input 10 to the output 20 and the functionality of the series resistance required for position detection.
  • the chip Measurement can be carried out analogously to the embodiment shown in Figure 3a.
  • FIG. 3b A further alternative embodiment of the position evaluation unit 30 according to the invention, which has an inductive element L such as. B. has a coil of predeterminable inductance, is shown in Figure 3b. Analogous to the above description, this results in an inductive voltage divider within the series circuit of the glow plug assemblies 120a, 120b, .. ( Figure 1).
  • the control line 110a When the control line 110a is acted upon by the central glow time control unit 110 with a step-shaped control signal, the rise of the voltage drop across a coil L to the position of the corresponding glow plug unit 120 can be deduced, since, depending on the position of the glow plug unit 120, due to the series connection Coils another, the rise time influencing, resulting inductance is effective.
  • the voltage across the coil L can again take place locally with the already described means V for voltage measurement, while a corresponding monitoring of the rise time is preferably carried out by the local control unit 40.
  • a capacitive element is provided which enables a position determination analogous to the method described above and is even simpler and less expensive to implement than the inductive element L.
  • each glow plug unit 120a, 120b, .. has the corresponding information and preferably stores it in a nonvolatile memory, such as an EEPROM memory integrated in the local control unit 40.
  • a nonvolatile memory such as an EEPROM memory integrated in the local control unit 40.
  • the control of the switches 15a, 15b is preferably also effected by the local Control unit 40.
  • FIG. 4 shows a first embodiment of a module 50 likewise contained in glow plug assembly 120, which has a glow plug 51.
  • a ground connection 51 b of the glow plug 51 is firmly connected to the ground potential, and an operating voltage connection 51 a of the glow plug 51 can be connected to the input 10 via the switch 16.
  • the operating voltage connection 51a of the glow plug 51 is always connected via the switch 16 to the input 10 when a control of the glow plug 51 is to take place.
  • the glow plug 51 becomes via the input 10 and the corresponding control lines
  • the central glow timing control apparatus 110 must also provide a sufficiently large electric power to ensure a sufficient power supply of the glow plug 51.
  • the switch 16 connects the input 10 to the output 20.
  • a diagnosis of the operation of the glow plug 51 is possible by the means V shown in FIG. 4 for voltage measurement.
  • the means V can record, for example, under the control of the local control unit 40, a voltage curve which adjusts itself to the glow plug 51 and at a time Deviation from typical voltage values or voltage curves, a diagnostic message may be sent from the relevant glow plug unit 120 to the central glow time control device 110 if necessary.
  • a short-circuit detection can be realized, which closes during a triggering of the glow plug 51 when falling below a voltage applied to the glow plug 51 voltage to a short circuit in the range of the glow plug 51.
  • An aging of the glow plug 51 can also be detected by a change in the voltage curve which occurs when the glow plug 51 is activated.
  • the means V for voltage measurement shown in FIG. 4 may be the same device which is also shown in FIG. 3a.
  • the measuring device V z. B. be directly connected to the input 10 and be activated either for position detection or for diagnostic purposes in an operation of the glow plug 51 ( Figure 4).
  • the means V for voltage measurement can also be integrated directly in the local control unit 40, for example in the form of at least one A / D (analog / digital) converter channel of a local control unit 40 designed as a microcontroller.
  • the local control unit 40 can open and close the switch 16 in accordance with a predefinable pattern, for example, in order to enable pulse-width-modulated control of the glow plug 51.
  • the central glow time control device 110 (FIG. 1) can provide a sufficiently large electrical power via the control line 110a, 110b, 110c, .., and locally in the glow plug units 120 for connecting the input 10 to the respective output 20 provided switches are designed for the currents occurring.
  • the glow plugs unit 120 particularly advantageously has a power supply unit (not shown) which stores the glow plug assembly 120 electrical energy supplied via the control line 110a, 110b, 110c and / or the components of the glow plug assembly 120, in particular the local Control unit 40, provides.
  • the energy supply unit can be equipped in a manner known per se, for example with a voltage converter, protective diodes or else with a local charge store.
  • step 200 the central glow time control device 110 (FIG. 1) first applies a predeterminable voltage to the control line 110a, and the respective switches 15a, 15b of the position evaluation units 30 of the various glow plug candles. Units 120a, 120b, .. are closed, so that a position evaluation can take place.
  • step 210 the determined position of each glow plug unit 120a, 120b, .. locally z. B. stored in a non-volatile memory of the local control unit 40. Possibly. Status feedback of the individual glow plug units 120 can be made to the central glow time control unit 110, in which a corresponding position information of the individual glow plug unit 120 is advantageously transmitted with each.
  • a specific glow plug unit 120b is activated.
  • the control can, for example, be such that the central Glühzeit Kunststoff réelle 110 via the control lines 110a, 110b, .. initially outputs the address or position of the Glühgestorgzenech 120b to be controlled, possibly together with Anêtparametern such. As a driving time or power profile or the like.
  • the communication unit of the corresponding glow plug unit 120b after a successful address or position comparison, forwards the information received via the control line 110a, 110b, .. to the local control unit 40 of the glow plug unit 120b, and then the glow plug 51 of the glow plug unit 120b is correspondingly driven.
  • a particular advantage of the system 100 according to the invention is that all glow plugs units 120 can be of the same design and, as it were, self-initialize via the described position detection, so that when installing the glow plug assemblies 120, a particular sequence or the like need not be considered.
  • the absolute number of glow plugs units 120 connected to a central glow time control device 110 can also be determined in a simple manner.
  • a particularly simple and inexpensive cabling with reduced line losses compared to conventional systems is possible by the series connection according to the invention.
  • the first section 110a of the control line can be designed as a line with a particularly large cross-section, since a reduction in the line losses in this section 110a due to the series connection affects all drive operations.
  • a conventional, suitable for single-wire transmission protocol can be used.
  • interference-proof and self-synchronizing Manchester coding can be used to encode data to be transmitted.
  • control line 110a, 110b, 110c, .. i. in particular also for supplying the glow plugs 51 to use a low-pass frequency range, and to transmit control signals in a bandpass frequency range, so that the control signals by appropriate filters in a conventional manner z. B. can be separated from a provided for energy transmission DC signal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne une unité (120a, 120b) à bougie-crayon de préchauffage comportant une entrée (10) pour raccordement de l'unité (120a, 120b) à bougie-crayon de préchauffage à une conduite de commande (110a, 110b, 110c) permettant de solliciter une bougie-crayon de préchauffage (51) de l'au moins unité (120a, 120b) à bougie-crayon de préchauffage. Conformément à l'invention l'unité à bougie-crayon de préchauffage (120a, 120b) présente une sortie (20), permettant le raccordement d'une autre unité (120a, 120b) à bougie-crayon de préchauffage avec la conduite de commande (110a, 110b, 110c).
EP06807279A 2005-11-07 2006-10-16 Unité à bougie-crayon de préchauffage et système de commande d une pluralité de bougies-crayons de préchauffage Withdrawn EP1948925A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005052880A DE102005052880A1 (de) 2005-11-07 2005-11-07 Glühstiftkerzeneinheit und System zum Betreiben einer Mehrzahl von Glühstiftkerzen
PCT/EP2006/067419 WO2007051697A1 (fr) 2005-11-07 2006-10-16 Unité à bougie-crayon de préchauffage et système de commande d’une pluralité de bougies-crayons de préchauffage

Publications (1)

Publication Number Publication Date
EP1948925A1 true EP1948925A1 (fr) 2008-07-30

Family

ID=37547503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06807279A Withdrawn EP1948925A1 (fr) 2005-11-07 2006-10-16 Unité à bougie-crayon de préchauffage et système de commande d une pluralité de bougies-crayons de préchauffage

Country Status (6)

Country Link
US (1) US20090218330A1 (fr)
EP (1) EP1948925A1 (fr)
JP (1) JP2009515089A (fr)
BR (1) BRPI0618831A2 (fr)
DE (1) DE102005052880A1 (fr)
WO (1) WO2007051697A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314863A1 (fr) * 2009-10-19 2011-04-27 Robert Bosch GmbH Dispositif pour contrôler les bougies de préchauffage dans un véhicule
JP5817688B2 (ja) * 2011-11-17 2015-11-18 株式会社デンソー グロープラグ通電制御装置
JP5810878B2 (ja) 2011-12-09 2015-11-11 株式会社デンソー 発熱体通電制御システム
JP5884694B2 (ja) * 2012-09-20 2016-03-15 株式会社デンソー 半導体装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3296496A (en) * 1964-06-30 1967-01-03 Gen Electric Electric heating devices
JPS60166759A (ja) * 1984-02-10 1985-08-30 Ngk Spark Plug Co Ltd グロ−プラグの通電制御方法および装置
JP3180250B2 (ja) * 1990-04-16 2001-06-25 日本特殊陶業株式会社 セラミックグロープラグの通電制御装置
JP3582135B2 (ja) * 1995-02-28 2004-10-27 いすゞ自動車株式会社 グロープラグ通電制御装置
DE19643014C1 (de) * 1996-10-18 1998-08-13 Telefunken Microelectron Bussystem zur elektronischen Energieversorgung
JP2001165440A (ja) * 1999-12-08 2001-06-22 Ngk Spark Plug Co Ltd グロープラグ及びその製造方法
JP4821060B2 (ja) * 2001-06-29 2011-11-24 いすゞ自動車株式会社 グロープラグ通電制御装置
DE102005009981A1 (de) * 2005-03-04 2006-09-28 Bayerische Motoren Werke Ag Vorrichtung zur Zündsteuerung
FR2878314A1 (fr) * 2005-05-19 2006-05-26 Siemens Vdo Automotive Sas Equipement, notamment bougie pour moteur a combustion interne a capteur integre et cablage unique, et vehicule utilisant cet equipement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007051697A1 *

Also Published As

Publication number Publication date
WO2007051697A1 (fr) 2007-05-10
DE102005052880A1 (de) 2007-05-10
JP2009515089A (ja) 2009-04-09
US20090218330A1 (en) 2009-09-03
BRPI0618831A2 (pt) 2011-09-13

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