• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Summary In a method for determining the bulk module of the industry in an industry system of an internal combustion engine (2) with a common rail industry injection system (6) with a high pressure volume (16) comprising the high pressure side of a high pressure pump (9) and an industry accumulator (8) with Injectors (7) for injecting fuel into cylinders of the internal combustion engine first determine the volume of the high pressure volume by supplying a fuel with a bulk module to the fuel system and controlling the high pressure pump (9) to perform a closed volume pump stroke of the high pressure volume. The value of the said determined volume is later used in another industry to determine the bulk module of that industry.
    公开号:SE1351320A1
    申请号:SE1351320
    申请日:2013-11-08
    公开日:2015-05-09
    发明作者:Kim Kylström；Roger Hälleberg
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION The present invention relates to a method for determining the bulk module of the industry in a fuel system of an internal combustion engine with a common rail fuel injection system having a high pressure volume comprising a high pressure sector and a pressure gauge. injection of fuel into cylinders has the internal combustion engine.
    The invention does not apply to any specific type of internal combustion engine or industry, and as non-exhaustive examples in the industry, diesel and ethanol can be mentioned. The invention also relates to the determination of the bulk module has the industry in an industry system for feeding fuel to internal combustion engines intended for all types of use, such as in industrial applications, in crushing machines and in all types of motor vehicles, such as e.g. ships and trains, also in the invention are particularly applicable to wheeled motor vehicles, especially commercial vehicles, such as lorries and buses, and for that reason below will sometimes be discussed in that use for the purpose of illustrating the invention but thus by no means limiting.
    BACKGROUND ART When operating an internal combustion engine whose fuel system can be supplied with the fuel of different quality, it is of interest to be able to determine the quality of the fuel used in order to be able to adapt the engine's operation and intervals for performing different service measures to the industry quality. A measure of the quality of the industry is its bulk module, ie how the industry can be compressed. It is an edge to determine the bulk module in the industry by sanding sound waves through the industry via an ultrasound sensor and feeding the speed of sound in the industry. Such an approach taken to determine the industry's bulk module is, in addition to the not insignificant cost of such equipment, suffered from the disadvantage that the industry is partially degraded by the sound waves, which causes wear and tear on parts of the industry system and the internal combustion engine that come into contact with the industry.
    For this reason, a number of different procedures for determining the bulk module in the industry without the use of such a sensor have been proposed. Examples of such are described in WO 2009121652, US 8215161, US 6805105, US 7523723 and EP 1030047 B1. However, these procedures are relatively complicated and / or leave some people wanting reliability.
    SUMMARY OF THE INVENTION The object of the present invention is to provide a method of initially defined kind, which is improved in at least some respect in relation to prior art such methods.
    This object is achieved according to the invention by fame such a method with the features drawn up in the jug-drawing part of claim 1. 3 In fuel systems of internal combustion engines with common-rail fuel injection systems, the pressure drop in the high-pressure volume is a parameter used for important diagnoses, such as the amount of fuel injected into the engine cylinders. It is therefore important to be able to feed the pressure drop with high accuracy, which is possible with pressure sensors available on the market. In order to be able to use the measured pressure drop with high accuracy in the result of such use, however, it is important to know the volume of the high pressure volume, which due to tolerances in the manufacture of fuel systems can vary by as much as 2.5%.
    However, by supplying an industry with a known bulk module to the industry system in accordance with the invention and performing a pump stroke and the feeds specified in step 1) in claim 1, the volume of the high pressure volume can easily be determined with high accuracy. This information can then be used to determine the bulk module of the industry supplied to the industry system by performing a named pump type and associated feeds and calculations for that industry.
    This also meant that it is no longer important to require tight tolerances in the manufacture of the components defining the high pressure volume, since the volume of the high pressure volume is still reliably determined by step 1) in the process according to the invention and then control of fuel injection in the engine can be adapted thereto. the bulk module in different industries can be determined with the help thereof. According to an embodiment of the invention, step 1) is performed the first time the fuel system has the internal combustion engine put into operation to calculate a value of the volume of the high pressure volume to be used in performing step 2) during later operation of the internal combustion engine.
    Thus, step 1) is used to determine a "zero" hour volume of the high pressure volume of the fuel system. This can take place in the factory when the equipment of the internal combustion engine and the fuel system is completed, for example in a factory producing motor vehicles, or during the first use of the fuel system of the internal combustion engine.
    According to another embodiment of the invention, step 2) is performed in connection with refilling of fuel at a fuel tank of the fuel system. In the case of a fuel system of an internal combustion engine in a motor vehicle, step 2) is then performed in connection with refueling the vehicle, so that the bulk module and thereby the quality of the refueled fuel can be determined, for example it is discovered that the vehicle is refueled with biodiesel instead of fossil Diesel. Then not only the engine but also the vehicle's operation can be adapted to the exact industry that currently exists in the industry system.
    According to another embodiment of the invention, step 2) is carried out once the fuel has been filled at the fuel tank. By determining the bulk module and thereby the quality of the industry used by the internal combustion engine, storage of this data can be used in the service of such equipment which is affected by the quality of the industry to determine whether certain measures should be taken in such service. For example, a replacement of a gasket may be necessary because the engine is mapped on a certain type of fuel which is known to cause more severe wear on a named gasket than another fuel.
    According to another embodiment of the invention, the process is carried out on a fuel system of an internal combustion engine in a motor vehicle.
    Refueling of motor vehicles can take place in a variety of places with varying industry quality and type, which makes it particularly interesting to carry out the inventive procedure on motor vehicles to adapt not only the engine but also the entire vehicle's operation and maintenance to the industry actually used.
    The invention also relates to a computer program having the sardra features listed in claim 6, a computer program product having the sardra features listed in claim 7, an electronic control unit having the sardra features listed in claim 8 and a motor vehicle according to claim 9.
    Other advantageous features and advantages of the invention will become apparent from the following description.
    BRIEF DESCRIPTION OF THE DRAWINGS The following is an exemplary embodiment of the invention with reference to the accompanying drawings, in which: Fig. 1 is a schematic sketch of an internal combustion engine with a common-rail fuel injection system to which an inventive method is applicable; showing a method according to an embodiment of the invention, and Fig. 3 is a schematic diagram of an electronic control unit for implementing a method according to the invention.
    DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION Referring now to Fig. 1, a fuel system of an internal combustion engine with a common-rail fuel injection system to which the method according to the invention is applicable will first be described. A driveline 1 of a motor vehicle comprises an internal combustion engine 2, for example a diesel engine, which is connected to the drive wheels (not shown) if the vehicle has a clutch 3 and a gearbox 4.
    The internal combustion engine 2 comprises a plurality, more precisely four, schematically indicated cylinders 5. The number of cylinders can of course be different. Fuel is fed to the cylinders with the aid of a common-rail fuel injection system 6 which comprises a number of electrically controlled injectors 7. In this case, the usual combustion engine of the cylinder has an associated injector. The injectors 7 are connected to a fuel accumulator 8 in the form of a so-called common rail, which constitutes an accumulator for accumulating high-pressure fuel to be fed to injectors. The fuel accumulator 8 is supplied with pressurized fuel by a high pressure pump 9, which receives fuel from a fuel tank 10 of the vehicle 11. The injectors 7 are connected to the fuel accumulator 8 via fuel lines 12 which are branched from the fuel accumulator to inject cylindrical fuel into the respective cylinder. 8.
    An electronic control unit 13 is arranged for controlling the injectors 7 for fuel input in the respective cylinder. The electronic control unit is also designed to control the high pressure pump 9. A pressure sensor 14 is arranged to supply the fuel pressure in the fuel accumulator 8 and true information about the supplied fuel pressure to the electronic control unit 13. Furthermore, a temperature sensor 15 is arranged to supply the temperature of the fuel in the industry accumulator.
    A high pressure volume 16 of the fuel system at- defined by the volume containing fuel and located between the high pressure side of the high pressure pump and the injectors. In order to calculate the volume of this high-pressure volume, the electronic control unit 13 is designed to be able to control the high-pressure pump 9 to perform a pump stroke with rod injectors, which means that through the data of the high-pressure pump the amount in the high-pressure volume is fed. If this has not been done before, this should be done for an industry with a bachelor's bulk module Bo.
    Fig. 2 shows a river diagram illustrating a method according to an embodiment of the invention for determining the bulk module of the industry in an industry system of the type described above. In a first step Si is asked if this is the first time the industry system has been put into operation. If the answer to this question is yes, in a second step S2 a fuel with a known bulk module Bo is supplied to the fuel system, warp via the sensor 14 the fuel pressure Pi is measured in the high pressure volume. Darpa controls the high pressure pump 9 to perform an 8 pump stroke to supply the amount M of fuel to the high pressure volume, warp the fuel pressure P2 in the high pressure volume any () is fed in step S. Darpa calculates the industry pressure increase AP produced by the pump stroke in step S6. Darpa or in parallel with or in connection with the previous step, the industry temperature T is measured in step S7. Then the question is asked whether this is the first time the industry system has been put into operation. If the answer to this question is yes, in step S9 the volume V of the high pressure volume from Bo, AP, T and M is calculated. If the answer to this question is no, the bulk module B of the industry is calculated in step Sii from V, AP, T and M.
    When a new fuel is filled on the fuel system and the high pressure volume V is already determined, the answer to the question in step Si will be no and fuel with an unknown bulk module B will be added to then have its bulk module calculated in step Sii.
    Computer program code for implementing a method according to the invention is suitably included in a computer program which can be loaded into the internal memory of a computer, such as the internal memory of an electronic control unit of an internal combustion engine. Such a computer program is suitably provided via a computer program product comprising a data storage medium which can be read by an electronic control unit, which data storage medium has the computer program stored there. Said data storage medium is, for example, an optical data storage medium in the form of a CD-ROM, a DVD, etc., a magnetic data storage medium in the form of a hard disk, a floppy disk, a cassette tape, etc., or a flash memory or a ROM type memory. , PROM, EPROM or EEPROM. Fig. 3 very schematically illustrates an electronic control unit 13 comprising an execution means 17, such as a central processor unit (CPU), for executing computer software. The execution means 17 communicates with a memory 18, for example of the RAM type, via a data bus 19. The control unit 13 also comprises data storage medium 20, for example in the form of a Flash memory or a memory of the type ROM, PROM, EPROM or EEPROM. The execution means 17 communicates with the data storage medium 20 via the data bus 19. A computer program comprising computer program code for implementing a method according to the invention, for example in accordance with the embodiment illustrated in Fig. 2, is stored on the data storage medium 20.
    The invention is of course not limited in any way to the embodiments described above, but a number of possibilities for modifications thereof should be obvious to a person skilled in the art without departing from the scope of the invention as defined in the appended claims.
    It is understood that the high pressure volume should be pressurized before carrying out step b) of the process according to the invention.
    权利要求:
    Claims (9)
    [1]
    1. supply a fuel with a bulk module (Bo) to the fuel system, 2. control the high pressure pump (9) to perform a pump stroke to supply a given amount (M) of fuel to the high pressure volume while keeping said injectors closed, 3. supply the fuel pressure in the high pressure volume before (P1) and after (P2) said pump stroke and thereby determining the fuel pressure increase (AP) effected by the pump stroke, 4. feed the temperature (T) has the said branch, and 5. calculate the volume (V) of the high pressure volume from the values of the said temperature (T), branch pressure increase (AP), quantity (M) supplied to the branch and the branch's bulk module (Bo), and 2) later in another branch in the high pressure volume perform steps b) - d) and then calculate the branch's bulk module (B) based on the temperature of the fuel (T), pressure increase (AP) and the volume (V) calculated in step 1), the high pressure volume is. 11
    [2]
    A method according to claim 1, characterized in that step 1) is performed the first time the fuel system of the internal combustion engine is put into operation, calculating a value of the high pressure volume (V) to be used in performing step 2) during later operation of the internal combustion engine.
    [3]
    A method according to claim 1 or 2, characterized in that step 2) is performed in connection with refueling of a fuel tank (10) of the fuel system.
    [4]
    Method according to claim 3, characterized in that step 2) is carried out as usual when fuel is filled at the fuel tank (10).
    [5]
    A method according to any one of the preceding claims, characterized in that it is carried out on a fuel system of an internal combustion engine (2) in a motor vehicle (11).
    [6]
    A computer program that is rechargeable directly into the internal memory of a computer, the computer program comprising computer program code for causing the computer to control the steps according to any one of claims 1-5 when said computer program.
    [7]
    A computer program product comprising a data storage medium readable by a computer, the computer program code of a computer program according to claim 6 being stored on the data storage medium.
    [8]
    Electronic control unit for determining the bulk module of the industry in an industry system of an internal combustion engine (2) 12 with a common-rail industry injection system (6) comprising an execution means (17), a memory (18) connected to the execution means and a connection connected to the execution means data storage medium (20), the computer program code of a computer program according to claim 6 being stored on said data storage medium (20).
    [9]
    A motor vehicle, characterized in that it comprises an electronic control unit (13) according to claim 8, and that it is a wheeled motor vehicle, such as a truck or bus.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4782794A|1986-08-18|1988-11-08|General Electric Company|Fuel injector system|
    CN1055745C|1993-05-06|2000-08-23|卡明斯发动机公司|Compact high performance fuel syste with accumulator|
    US6102000A|1993-11-02|2000-08-15|Toyota Jidosha Kabushiki Kaisha|Fuel injection apparatus for engine|
    JP3796912B2|1997-02-21|2006-07-12|トヨタ自動車株式会社|Fuel injection device for internal combustion engine|
    JP2000234543A|1999-02-15|2000-08-29|Toyota Motor Corp|Fuel pressure control device for high pressure fuel injection system|
    JP4304887B2|2001-06-19|2009-07-29|株式会社デンソー|Fuel supply system for alternative fuels|
    JP4042058B2|2003-11-17|2008-02-06|株式会社デンソー|Fuel injection device for internal combustion engine|
    JP4052261B2|2004-03-02|2008-02-27|トヨタ自動車株式会社|Fuel supply device for internal combustion engine|
    US7523723B2|2006-08-11|2009-04-28|Gm Global Technology Operations, Inc.|System and method for determining ethanol content in fuel|
    US7650778B2|2007-06-05|2010-01-26|Caterpillar Inc.|Method and apparatus for testing a gear-driven fuel pump on a fuel injected IC engine|
    US7891340B2|2008-04-30|2011-02-22|Ford Global Technologies, Llc|Feed-forward control in a fuel delivery system and leak detection diagnostics|
    DE102008031535B3|2008-07-03|2010-01-21|Continental Automotive Gmbh|Method for determining a temperature of a fuel of an injection system|
    JP4911199B2|2009-06-17|2012-04-04|株式会社デンソー|Fuel condition detection device|
    JP5472151B2|2011-02-18|2014-04-16|株式会社デンソー|Fuel injection device|
    US9275009B2|2011-09-02|2016-03-01|Schlumberger Technology Corporation|Calibration and consistency check of variable volume systems|
    US9243598B2|2014-02-25|2016-01-26|Ford Global Technologies, Llc|Methods for determining fuel bulk modulus in a high-pressure pump|
    US9316161B2|2014-04-02|2016-04-19|Ford Global Technologies, Llc|High pressure fuel pumps with mechanical pressure regulation|
    US10161346B2|2014-06-09|2018-12-25|Ford Global Technologies, Llc|Adjusting pump volume commands for direct injection fuel pumps|
    US20150338329A1|2015-07-30|2015-11-26|Caterpillar Inc.|Bulk modulus measurement and fluid degradation analysis|SE539985C2|2016-06-27|2018-02-20|Scania Cv Ab|Determination of pressurized fuel temperature|
    GB2568090A|2017-11-06|2019-05-08|Delphi Tech Ip Ltd|Method for determining the bulk modulus of a fuel|
    RU2664443C1|2018-02-09|2018-08-17|Российская Федерация, от имени которой выступает Государственная корпорация по космической деятельности "РОСКОСМОС"|Unit for hydrocarbon rocket fuel research|
    US11181089B2|2019-02-20|2021-11-23|Ford Global Technologies, Llc|Fuel composition and aging estimation|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1351320A|SE539683C2|2013-11-08|2013-11-08|Method for determining the bulk module of fuels|SE1351320A| SE539683C2|2013-11-08|2013-11-08|Method for determining the bulk module of fuels|
    EP14860465.5A| EP3066323B1|2013-11-08|2014-11-03|Method for determining the bulk modulus of fuels|
    US15/034,260| US9903849B2|2013-11-08|2014-11-03|Method for determining the bulk modulus of fuels|
    KR1020167011933A| KR101799950B1|2013-11-08|2014-11-03|Method for determining the bulk modulus of fuels|
    PCT/SE2014/051293| WO2015069171A1|2013-11-08|2014-11-03|Ethod for determining the bulk modulus of fuels|
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