EP2314863A1 - Vorrichtung zur Überwachung von Zündkerzen in einem Fahrzeug - Google Patents

Vorrichtung zur Überwachung von Zündkerzen in einem Fahrzeug Download PDF

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Publication number
EP2314863A1
EP2314863A1 EP09173392A EP09173392A EP2314863A1 EP 2314863 A1 EP2314863 A1 EP 2314863A1 EP 09173392 A EP09173392 A EP 09173392A EP 09173392 A EP09173392 A EP 09173392A EP 2314863 A1 EP2314863 A1 EP 2314863A1
Authority
EP
European Patent Office
Prior art keywords
glow
glow plugs
life time
glow plug
parameters
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Withdrawn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
EP09173392A
Other languages
English (en)
French (fr)
Inventor
Bernd Rapp
Sascha Joos
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
Priority to EP09173392A priority Critical patent/EP2314863A1/de
Publication of EP2314863A1 publication Critical patent/EP2314863A1/de
Withdrawn legal-status Critical Current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
    • F02P19/027—Safety devices, e.g. for diagnosing the glow plugs or the related circuits
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/228—Warning displays

Definitions

  • the invention relates to a glow plug controller for a combustion engine.
  • the US 2008/0319599 A1 discloses a glow plug controller which detects an underperforming glow plug, based on the reading from the engine speed.
  • the recorded engine parameters and glow plug parameters are close to the actual working conditions of the engine and provide a possibility for further test and development of the glow plugs and the glow controllers.
  • a device 100 to monitor at least one glow plug 110 to 113 comprises a receiving means 102 receiving a set of engine parameters 104 and delivering the engine parameters 104 to a control means 106 to generate a set of control signals 108 to control the glow plugs 110 to 113.
  • a calibrated MAP 116 and a reference MAP 117 contain various data required by the control means 106 to control the glow plugs 110 to 113.
  • the reference MAP 117 provides the maximum voltage to be applied to the glow plugs based on the engine operating conditions. This is provided by the manufacturer of the glow plugs.
  • the calibrated MAP 116 contains the fine tuned voltage values to be applied for the glow plugs for different engine operating conditions.
  • the calibrated MAP is prepared during the application phase of the engine when the engine is tested along with the glow plugs.
  • a measuring means 118 continuously measures the glow plug parameters.
  • the engine parameters comprise at least air mass, air temperature, swirl, oil consumption, Kilometres travelled, pressure of fuel supplied which is referred as rail pressure, and spray lay out.
  • the swirl indicates how the air-fuel mixture in the combustion engine rotates.
  • the spray lay out indicates the position of the glow plugs with relative to the injection streams.
  • the glow plug parameters comprise at least voltage V of the glow plugs, current I of the glow plugs, temperature of the glow plugs, material of the glow plugs etc.
  • a recording means 120 records a few selected glow plug parameters along with the associated engine parameters which are present at the same time.
  • the data recorded by the recording means is referred as history.
  • a life time model computation means 122 continuously computes an aging factor based on the history and provides information on remaining life time of the glow plugs.
  • Each of the glow plugs 110 to 113 have their tips located in separate cylinders of an engine which is not shown. When the glow plugs 110 to 113 are energised, they help in igniting the fuel, especially when the engine is at a lower temperature.
  • the number of glow plugs is shown as 4 as an example and the number of glow plugs may vary based on the engine requirements.
  • the said device 100 comprises all the features of a conventional glow plug controller.
  • the device 100 further comprises the recording means 120 and the LTM (Life Time Model) computing means 122.
  • the invention proposes a device and a method to record the history of the glow plugs and also to provide information on the remaining life time of the glow plugs.
  • a warning means 124 gets automatically activated whenever a pre-defined condition is encountered. There may be different pre-defined conditions like, for example, if the remaining life time of a glow plug is less than a predefined threshold etc.
  • the warning means 124 can also be activated by a user at any time when the glow plugs are not currently operational.
  • the warning means 124 generates a warning signal when the predefined condition is satisfied.
  • the warning signal may be used to glow one or more warning lamps or may be used to display a message in the instrument cluster of the vehicle.
  • the cooling rate is computed using at least air mass, air temperature and swirl.
  • the power density is computed using at least U, I, V where U is the volume of the glow plug bit, I is the current of the glow plug and V is the voltage of the glow plug.
  • the corrosion is computed using at least oil consumption, kilometers, glow plug temperature, glow plug material.
  • the erosion is computed using at least pressure of the fuel which is referred as rail pressure, spray layout, glow plug material.
  • the remaining life time of a glow plug is computed as f (specified life time of the glow plug, aging factor of the glow plug)
  • Each of the parameters used in the above computations are either part of the engine parameters or the glow plug parameters or they are pre-stored in the said device 100.
  • the said warning means When the remaining life time of a glow plug is below a set threshold, the said warning means generates a warning to the user so that the vehicle can be taken to a service station for replacing the glow plugs.
  • the replacement of the glow plugs can be planned in advance.
  • the abnormality of the glow plugs may be complete failure of the glow plugs to operate or the glow plugs operating beyond their set thresholds.
  • the history is close to the actual working conditions of the engine and the glow plugs; hence they provide a possibility for further test and development of the glow plugs and the glow plug controllers.
  • the engine control unit or the said device 100 in the vehicle can keep monitoring for the remaining life time of the glow plugs and can generate warnings to the user sufficiently in advance for replacing the glow plugs.
  • a warning is generated if the computed life time of any of the glow plugs is below a set threshold.
  • the warning could be an audio signal or a visual indicator.
  • a life time model of the glow plugs can be computed.
  • the life time model of the glow plugs can be used to further study the durability and the aging of the glow plugs. Because of the aging, the temperature generated at the glow plugs may decrease over a period of time for the same voltage applied.
  • the life time model so computed can be used to know the variations in the temperature because of the aging and to generate an appropriate compensation for the aging.
  • the compensation may be in the form of adding a positive offset to the voltage of the glow plugs to generate a specific temperature.
  • the said device 100 or the engine controller can adapt the control means 106 to soft modes in which the glow plugs are operated at a lower load, for example when the push up is required from low temperature to very high temperature, the temperature is increased gradually rather than increasing rapidly.
  • the glow plugs can be de-activated, for example the re-generation mode of the engine where extra temperature is required in the exhaust. These modes need additional operational time from the glow plugs which can be avoided if the glow plugs' life time is below a set threshold. This is like providing a limp home feature for the glow plugs where the glow plugs operate with limited features. In other words the glow plugs are operated in modes which prolong the remaining life time of the glow plugs.
  • the above two features are to ensure that whenever the remaining life time of the glow plugs is below a set threshold, the life of the glow plug is extended to maximum possible period to enable the user to take the vehicle to the service station to replace the glow plugs.
  • a multiple sets of history can be stored. Whenever the memory is full, the oldest set of history can be overwritten.
  • the embodiment shown in Fig. 1 shows the device 100 receiving the engine parameters, analysing the engine parameters and generating the control signals to the glow plugs and also monitoring the glow plugs.
  • the device includes a microcontroller and the associated components like memory etc.
  • the function of the device 100 can be included in the engine controller.
  • the device 100 and the engine controller may share part of the recording functionality or share part of the monitoring of the glow plugs.
  • the device does not include the processing means 124 and the LTM computing means 122.
  • the embodiment in Fig. 2 is similar to Fig. 1 and describes the same elements with the same functionalities as in Fig. 1 .
  • the device 200 has an interface means 202 which establishes a communication with an external device on detection of a pre-defined event.
  • the pre-defined event may be a time out or detection of an external device connected to the interface means 202.
  • the interface means 202 After establishing the communication with an external device, the interface means 202 reads the history and sends the same through an output port to an external device for processing.
  • Shown in fig. 3 is a diagnostic tester 300 which receives the history from the device 200 shown in fig. 2 .
  • the diagnostic tester may be a device used in a work shop to test the vehicles.
  • both the devices establish communication using pre-defined hand shake messages through the interface means 302. Once the communication is established, the diagnostic tester 300 receives the history using a pre-defined protocol.
  • the processing means 304 is similar to the processing means 124.
  • the processing means 304 provides information regarding the remaining life time of the glow plugs based on the analysis of the history.

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)
EP09173392A 2009-10-19 2009-10-19 Vorrichtung zur Überwachung von Zündkerzen in einem Fahrzeug Withdrawn EP2314863A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09173392A EP2314863A1 (de) 2009-10-19 2009-10-19 Vorrichtung zur Überwachung von Zündkerzen in einem Fahrzeug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09173392A EP2314863A1 (de) 2009-10-19 2009-10-19 Vorrichtung zur Überwachung von Zündkerzen in einem Fahrzeug

Publications (1)

Publication Number Publication Date
EP2314863A1 true EP2314863A1 (de) 2011-04-27

Family

ID=41785680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09173392A Withdrawn EP2314863A1 (de) 2009-10-19 2009-10-19 Vorrichtung zur Überwachung von Zündkerzen in einem Fahrzeug

Country Status (1)

Country Link
EP (1) EP2314863A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140338626A1 (en) * 2013-05-16 2014-11-20 Ford Global Technologies, Llc Enhanced glow plug control
US9683536B2 (en) 2013-05-16 2017-06-20 Ford Global Technologies, Llc Enhanced glow plug control

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59209037A (ja) * 1983-05-12 1984-11-27 Toshiba Corp 耐熱寿命予測装置
DE102005040439A1 (de) * 2005-08-25 2007-03-01 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine mit einem Heizelement
WO2007033825A1 (de) * 2005-09-21 2007-03-29 Beru Aktiengesellschaft Verfahren zum ansteuern einer gruppe von glühkerzen in einem dieselmotor
DE102006005712A1 (de) * 2006-02-08 2007-08-16 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung wenigstens einer Glühkerzen eines Kraftfahrzeugs
US20080319599A1 (en) 2007-06-25 2008-12-25 International Engine Intellectual Property Company, Llc Engine glow plug diagnosis using crankshaft sensor data
US20090037120A1 (en) * 2007-08-01 2009-02-05 Denso Corporation Glow plug degradation determination device
JP2009047134A (ja) * 2007-08-22 2009-03-05 Toyota Motor Corp 内燃機関のグロープラグ通電量制御装置
US20090193882A1 (en) * 2008-02-04 2009-08-06 Rainer Moritz Method and device for detecting the exchange of sheathed-element glow plugs in a combustion engine
US20090218330A1 (en) * 2005-11-07 2009-09-03 Rainer Moritz Sheathed-element glow plug unit and system for operating a plurality of sheathed-element glow plugs
DE102008002574A1 (de) * 2008-06-20 2010-01-14 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ansteuerung einer Glühkerze

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59209037A (ja) * 1983-05-12 1984-11-27 Toshiba Corp 耐熱寿命予測装置
DE102005040439A1 (de) * 2005-08-25 2007-03-01 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine mit einem Heizelement
WO2007033825A1 (de) * 2005-09-21 2007-03-29 Beru Aktiengesellschaft Verfahren zum ansteuern einer gruppe von glühkerzen in einem dieselmotor
US20090218330A1 (en) * 2005-11-07 2009-09-03 Rainer Moritz Sheathed-element glow plug unit and system for operating a plurality of sheathed-element glow plugs
DE102006005712A1 (de) * 2006-02-08 2007-08-16 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung wenigstens einer Glühkerzen eines Kraftfahrzeugs
US20080319599A1 (en) 2007-06-25 2008-12-25 International Engine Intellectual Property Company, Llc Engine glow plug diagnosis using crankshaft sensor data
US20090037120A1 (en) * 2007-08-01 2009-02-05 Denso Corporation Glow plug degradation determination device
JP2009047134A (ja) * 2007-08-22 2009-03-05 Toyota Motor Corp 内燃機関のグロープラグ通電量制御装置
US20090193882A1 (en) * 2008-02-04 2009-08-06 Rainer Moritz Method and device for detecting the exchange of sheathed-element glow plugs in a combustion engine
DE102008002574A1 (de) * 2008-06-20 2010-01-14 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ansteuerung einer Glühkerze

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140338626A1 (en) * 2013-05-16 2014-11-20 Ford Global Technologies, Llc Enhanced glow plug control
US9683536B2 (en) 2013-05-16 2017-06-20 Ford Global Technologies, Llc Enhanced glow plug control
RU2645402C2 (ru) * 2013-05-16 2018-02-21 Форд Глобал Технолоджис, ЛЛК Способ управления температурой запальной свечи, подключенной к дизельному двигателю

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