EP1296026A1 - Dispositif et méthode pour déterminer la présence de suie dans l'huile des moteurs Diesel - Google Patents

Dispositif et méthode pour déterminer la présence de suie dans l'huile des moteurs Diesel Download PDF

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Publication number
EP1296026A1
EP1296026A1 EP02078488A EP02078488A EP1296026A1 EP 1296026 A1 EP1296026 A1 EP 1296026A1 EP 02078488 A EP02078488 A EP 02078488A EP 02078488 A EP02078488 A EP 02078488A EP 1296026 A1 EP1296026 A1 EP 1296026A1
Authority
EP
European Patent Office
Prior art keywords
engine
engine operating
soot
oil
soot content
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Withdrawn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
EP02078488A
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German (de)
English (en)
Inventor
Axel H. Berndorfer
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1296026A1 publication Critical patent/EP1296026A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
    • F01M2011/1466—Indicating devices; Other safety devices for indicating the necessity to change the oil by considering quantity of soot

Definitions

  • the present invention relates generally to diesel engines.
  • soot In diesel engines, the combustion process yields much more soot than gasoline engines. As such, there is a greater likelihood that soot will be introduced into the engine oil, e.g., by combustion gases leaking around the piston rings. Consequently, diesel engines are more likely to be damaged by soot than conventional gasoline engines.
  • the rate of degradation of oil used to lubricate diesel engines is often determined by the rate at which soot is introduced into the diesel engine oil. Accordingly, the interval at which the diesel engine oil must be changed is often dependent on the amount of soot in the oil. When the soot in the engine oil reaches a critical level, the oil must be replaced with fresh soot-free oil.
  • the present invention recognizes that there currently is not a sensor that can relatively easily and relatively reliably be used to measure the soot content in the diesel engine oil.
  • a sensor In lieu of a sensor, sampling methods have been used whereby oil is taken from a diesel engine and processed in a laboratory to determine the soot content. These sampling methods take time and are costly.
  • the present invention has recognized these prior art drawbacks, and has provided the below-disclosed solutions to one or more of the prior art deficiencies.
  • a method for predicting soot content in engine oil includes monitoring an engine operating condition and determining the soot introduction rate based thereon.
  • the soot content can be determined based on the soot introduction rate.
  • a look-up table of soot introduction rates based on the engine operating condition is generated. The look-up table is accessed using the engine operating condition as an entering argument and the soot introduction rate is determined based on the engine operating condition. The soot introduction rate is then used to determine the soot content in the engine oil.
  • the look-up table is generated for at least one class of engine.
  • the engine operating condition is an engine operating temperature, an engine operating load, an engine operating speed, an elapsed engine operating time, a mileage value, fuel composition, fuel consumption rate, and/or an exhaust gas recirculation rate.
  • a method for predicting soot content in an engine includes generating at least one look-up table of soot introduction rates based on an engine operating condition and monitoring the engine operating condition.
  • the look-up table is accessed using the engine operating condition as an entering argument in order to determine the soot content in the engine oil.
  • a system for predicting soot content in engine oil includes an engine and an oil pan that provides oil to the engine.
  • a control module monitors an engine operating condition and includes a program for predicting the soot content in the engine oil based on the engine operating condition.
  • a system for predicting soot content in engine oil includes an engine and an oil pan that provides oil to the engine.
  • An oil sensor monitors an engine operating condition and includes a program for predicting the soot content in the engine oil based on the engine operating condition.
  • a diesel engine oil lubricating system is shown and generally designated 10.
  • the system 10 includes a diesel engine 12 in fluid communication with an oil pan 14 to provide lubricating oil to the internal engine components, e.g., the crankshaft, camshafts, rocker arms, pushrods, pistons, etc.
  • Figure 1 further shows a control module 16 electrically connected to the engine 12 by electric line 18.
  • an output device 20 is electrically connected to the control module 16 by electric line 22.
  • An oil sensor 24 is disposed in the oil pan 14 such that it communicates with oil therein. The sensor 24 is electrically connected to the control module 16 by electric line 26 and can receive data concerning engine operating parameters therefrom.
  • control module 16 can be, e.g., an engine control module (ECM) or a body control module (BCM).
  • the output device 20 can be an audible warning device, e.g., a buzzer or audible alarm.
  • the output device 20 can also be a visual warning device, e.g., a warning lamp or other visual display.
  • the output device 20 can be a visual indicator of the soot content in the engine oil, e.g., a gauge or similar device.
  • control module 16 While the preferred implementation of the control module 16 is an onboard chip such as a digital signal processor, it is to be understood that the logic disclosed below can be executed by other digital processors, such as by a personal computer. Or, the control module 16 may be any computer, including a Unix computer, or OS/2 server, or Windows NT server, or a laptop computer.
  • the control module 16 includes a series of computer-executable instructions, as described below, which will allow the control module 16 to predict the soot content in the engine oil based on one or more engine operating conditions. These instructions may reside, for example, in RAM of the control module 16. On the other hand, in the case of a "smart" sensor, the instructions reside in RAM of the oil sensor 24.
  • the instructions may be contained on a data storage device with a computer readable medium, such as a computer diskette.
  • the instructions may be stored on a magnetic tape, conventional hard disk drive, electronic read-only memory, optical storage device, or other appropriate data storage device.
  • the computer-executable instructions may be lines of compiled C++ compatible code.
  • the flow charts herein illustrate the structure of the logic of the present invention as embodied in computer program software.
  • Those skilled in the art will appreciate that the flow charts illustrate the structures of computer program code elements including logic circuits on an integrated circuit, that function according to this invention.
  • the invention is practiced in its essential embodiment by a machine component that renders the program elements in a form that instructs a digital processing apparatus (that is, a computer) to perform a sequence of function steps corresponding to those shown.
  • a do loop is entered wherein for each engine class, i.e., for each different sizes and engine configurations, the succeeding steps are performed. Thereafter, at block 32 a second do loop is entered wherein for a range of engine operating parameters, the following steps are performed.
  • the engine operating parameters include, but are not limited to, the following: engine operating temperature, engine operating load, engine operating speed, elapsed engine operating time, mileage, fuel composition, fuel consumption rate, and/or exhaust gas recirculation rate.
  • the engine is allowed to operate for a predetermined time. Thereafter, at block 40, the engine is stopped. Moving to block 42, the soot introduced into the oil pan, and thus, the engine oil, by the combustion of diesel fuel within the diesel engine is measured. Continuing to decision diamond 44, it is determined whether more data is needed to construct a table of data, described below. If more data is indeed needed, the logic returns to block 38 wherein the engine is again allowed to operate for a predetermined time. The logic then continues to as described above.
  • the logic moves to block 46 to complete the above process for all nested loops.
  • the logic moves to block 48 where look-up table for soot introduction versus engine operating time are generated for each engine class over the ranges of engine parameters used above. Then, at block 50, the look-up tables for the relevant engine class are downloaded to the control module 16.
  • look-up tables can be generated to simulate the operating conditions for different classes of engines. Diesel engines used in tractor trailers will have greater loads put on them than, e.g., stationary diesel power generators. Moreover, the look-up tables are preferably generated for soot introduction versus engine operating time rather than mileage because many diesel engines are used in low mileage, or no mileage, applications, e.g., stationary power generators, excavators, front-end loaders, etc. However, it can be appreciated that for tractor trailers and other high mileage vehicles having diesel engines, look-up tables can be generated for soot introduction versus mileage for the ranges of engine operating conditions used above.
  • a do loop is entered wherein for a diesel engine, the following steps are performed.
  • the engine operating conditions include, but are not limited to, the following: engine operating temperature, engine operating load, engine operating speed, elapsed engine operating time, mileage, fuel composition, fuel consumption rate, and/or exhaust gas recirculation rate.
  • the lockup tables stored in the control module 16 are periodically accessed to determine the soot introduced rates based on the engine operating conditions monitored above. Then, at block 66, the soot content in the engine is determined based on the different soot introduction rates determine above.
  • a visual indication of the amount of soot introduced into the oil since the previous oil change can be provided to the driver or operator of the diesel engine.
  • decision diamond 68 it is determined whether oil has been added to the system. If so, the logic moves to block 70 where the soot content value is adjusted to account for the additional oil in the system. Next, the logic proceeds to decision diamond 72 where it is determined whether soot content in the oil is greater than a predetermined critical soot content value. It can be appreciated that the critical soot content value represents a quantity of soot in the engine oil that can be harmful to the engine.
  • the logic proceeds to block 74 where it is indicated to the driver or operator using, e.g., the output device 22, that it is time to change the oil in the diesel engine 12. If, at decision diamond 72, the soot content is less than the critical soot content value, the logic returns to block 62 where the control module continues to monitor the engine operating conditions. Then, the logic continues as described above. Returning to decision diamond 68, if oil is not added to the system, the logic moves to decision diamond 72 and proceeds as described above.
  • the system and method for predicting soot content in diesel engines provides a means for accurately predicting the soot introduced into diesel engine oil from the combustion of diesel fuel therein.
  • the system and method for predicting soot content in diesel engines provides a means for accurately determining when the diesel engine oil must be changed based on the rate of soot introduction.
  • the above logic can be used to predict the soot content in other engines that may fall prey to high soot content in the lubricating oil, e.g., engines that utilize internal injection processes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
EP02078488A 2001-09-19 2002-08-23 Dispositif et méthode pour déterminer la présence de suie dans l'huile des moteurs Diesel Withdrawn EP1296026A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/956,546 US20030051696A1 (en) 2001-09-19 2001-09-19 System and method for predicting soot content in diesel engines
US956546 2001-09-19

Publications (1)

Publication Number Publication Date
EP1296026A1 true EP1296026A1 (fr) 2003-03-26

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EP02078488A Withdrawn EP1296026A1 (fr) 2001-09-19 2002-08-23 Dispositif et méthode pour déterminer la présence de suie dans l'huile des moteurs Diesel

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US (1) US20030051696A1 (fr)
EP (1) EP1296026A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2989727A1 (fr) * 2012-04-20 2013-10-25 Peugeot Citroen Automobiles Sa Procede et dispositif d'evaluation de la charge de particules de suie introduite dans une huile de lubrification d'un moteur diesel
WO2020012058A1 (fr) * 2018-07-11 2020-01-16 Wärtsilä Finland Oy Appareil, dispositif et procédé mis en œuvre par ordinateur pour déterminer la durée de vie restante d'huile moteur dans un moteur

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2418988B (en) * 2004-10-06 2008-09-17 Ford Global Tech Llc A soot management system for an engine
KR101163806B1 (ko) * 2006-12-14 2012-07-09 기아자동차주식회사 동적 슈트 시뮬레이션 방법
FR2934636A3 (fr) * 2008-08-04 2010-02-05 Renault Sas Procede de prediction de la quantite de matieres charbonneuses dans l'huile d'un moteur diesel de vehicule automobile.
JP6281576B2 (ja) * 2016-01-12 2018-02-21 マツダ株式会社 エンジンオイルの劣化診断装置
JP6414802B2 (ja) * 2016-03-25 2018-10-31 マツダ株式会社 ディーゼルエンジンのエンジンオイル劣化診断装置
EP4170137A1 (fr) * 2021-10-19 2023-04-26 Volvo Penta Corporation Procédé de prédiction d'accumulation de suie dans un système de moteur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4506337A (en) * 1981-07-29 1985-03-19 Nissan Motor Company, Limited Engine lubricating oil replacement timing monitoring system and method for an automotive vehicle
US5750887A (en) * 1996-11-18 1998-05-12 Caterpillar Inc. Method for determining a remaining life of engine oil
US5914890A (en) * 1997-10-30 1999-06-22 Caterpillar Inc. Method for determining the condition of engine oil based on soot modeling
US5969601A (en) * 1997-09-05 1999-10-19 Komatsu Ltd. Apparatus and method for predicting replacement timing of engine lubricating oil
US6253601B1 (en) * 1998-12-28 2001-07-03 Cummins Engine Company, Inc. System and method for determining oil change interval

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4506337A (en) * 1981-07-29 1985-03-19 Nissan Motor Company, Limited Engine lubricating oil replacement timing monitoring system and method for an automotive vehicle
US5750887A (en) * 1996-11-18 1998-05-12 Caterpillar Inc. Method for determining a remaining life of engine oil
US5969601A (en) * 1997-09-05 1999-10-19 Komatsu Ltd. Apparatus and method for predicting replacement timing of engine lubricating oil
US5914890A (en) * 1997-10-30 1999-06-22 Caterpillar Inc. Method for determining the condition of engine oil based on soot modeling
US6253601B1 (en) * 1998-12-28 2001-07-03 Cummins Engine Company, Inc. System and method for determining oil change interval

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2989727A1 (fr) * 2012-04-20 2013-10-25 Peugeot Citroen Automobiles Sa Procede et dispositif d'evaluation de la charge de particules de suie introduite dans une huile de lubrification d'un moteur diesel
EP2653677A3 (fr) * 2012-04-20 2018-04-04 PSA Automobiles SA Procédé et dispositif d'évaluation de la charge de particules de suie introduite dans une huile de lubrification d'un moteur diesel
WO2020012058A1 (fr) * 2018-07-11 2020-01-16 Wärtsilä Finland Oy Appareil, dispositif et procédé mis en œuvre par ordinateur pour déterminer la durée de vie restante d'huile moteur dans un moteur
CN112400110A (zh) * 2018-07-11 2021-02-23 瓦锡兰芬兰有限公司 用于确定发动机中的发动机油的剩余寿命的设备、装置和计算机实现的方法
US11339693B2 (en) * 2018-07-11 2022-05-24 Wärtsilä Finland Oy Apparatus, device and computer implemented method for determining remaining life of engine oil in engine
CN112400110B (zh) * 2018-07-11 2024-02-20 瓦锡兰芬兰有限公司 用于确定发动机中的发动机油的剩余寿命的设备、装置和计算机实现的方法

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