• 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 The present invention relates to an arrangement and a method for estimating the content of an additive fuel in a fuel mixture. The internal combustion engine (1) is provided with a so-called Common Rail system rued a high pressure pump (6) and an accumulator tank (7) for storing the fuel mixture before it is injected into the internal combustion engine (1). The arrangement comprises a control unit (9) which, adapted to determine the pressure change (Ap) in an accumulator tank (7) Mom at the time interval (At) by means of the pressure value from a pressure sensor (7a), by providing information about a corresponding pressure change (A). Apo) for a reference fuel mixture with a degree content of the additive fuel Mom a corresponding time interval (At) and all estimate the fuel mixture content of the additive fuel by comparing the pressure change (Ap) for the fuel mixture with the pressure change (Apo) before the reference fuel mixture.
    公开号:SE1151279A1
    申请号:SE1151279
    申请日:2011-12-28
    公开日:2013-06-29
    发明作者:Roger Haelleberg
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    BACKGROUND OF THE INVENTION AND PRIOR ART The present invention relates to an arrangement and a method for estimating the fuel mix content of an additive fuel according to the preambles of claims 1 and 11.
    Diesel fuel recently includes a blend of conventional diesel oil and FAME (Fatty Acid Methyl Ester). FAME that a common name for renewable diesel with mainly vegetable oils as raw materials. The most common raw material is rapeseed oil which can be esterified to rapeseed methyl ester RME. RME that thus that a form of FAME. The diesel industry in Sweden currently contains 7% FAME. In other countries, other levels of FAME are present in the diesel industry. In particular, vehicles that travel across national borders can thus be powered by diesel fuel that contains varying levels of FAME.
    Diesel fuel that contains FAME has different properties in relation to conventional diesel oil. How much the properties of the diesel fuel are different depends on how much FAME content the diesel fuel contains. Diesel fuel with FAME has, for example, a different ignition temperature, a different energy content and a different evaporation temperature than conventional diesel oil. These properties affect the combustion process of the diesel engine, the after-treatment of the exhaust gases and the engine oil.
    Diesel fuel is usually injected with a very high pressure into the combustion chambers of a diesel engine. In order to enable such an industry injection that it is common to use a so-called "Common Rail system". A Common Rail system includes a high pressure pump that pumps fuel at a very high pressure to an accumulator tank (Common Rail). The pressure in the accumulator tank can be up to 2000 bar during operation. The fuel in the accumulator tank is injected into the cylinders of the diesel engine by means of electronic injectors. An electric control unit essentially continuously calculates the amount of fuel to be supplied to the respective cylinders with information from various engine parameters such as e.g. load and speed. The electrical control unit also receives information from a pressure sensor regarding the radiating pressure in the accumulator tank. With karmedom about the pressure in the accumulator tank, the electric control unit controls the Opperlider for the electric injectors said. of the calculated amount of fuel with a good accuracy belongs to the combustion chambers of the respective cylinders.
    SE 518 924 discloses a method and apparatus for estimating the industry quality of eft industry. It does this by detecting the movement of a valve in a valve body during a closing phase to a value significant to the energy content of the industry. The amount of fuel injected into the engine is controlled based on the said value.
    SUMMARY OF THE INVENTION The object of the present invention is to provide, after application and a method for estimating the content of an fuel mixture of an additive fuel in connection with the fuel mixture to be combusted in an internal combustion engine.
    The object of delia is achieved with the arrangement of the initial narrative kind, which can be characterized by the features stated in the can-drawing part of claim 1. According to the invention, an injection system is used where the fuel mixture is pressurized by a high-pressure pump and led to an accumulator tank before it is sprayed into the combustion engine. With the help of a pressure sensor in the accumulator tank, it is possible to estimate the pressure rise of the fuel mixture in the accumulator tank when the high pressure pump is operating. This pressure increase is related to the density, viscosity, compressibility of the fuel mixture, etc. In many cases, the above-mentioned quantities of two miscible industries can be relatively different. When fuel mixtures with different levels of eli additive fuel are pressurized with a high-pressure pump, a clearly feedable pressure difference is obtained. According to the invention, the pressure increase of the fuel mixture is determined after it has been pressurized by the high-pressure pump. According to the invention, the control unit has access to information regarding a corresponding pressure boiling value for a reference fuel mixture which contains a known content of the additive fuel. By comparing the pressure boiling of the fuel mixture after it has been pressurized by the high-pressure pump with the pressure boiling of the reference mixture, the control unit can relate the pressure boiling of the fuel mixture to the pressure boiling of the reference fuel mixture. If the pressure boiling of the fuel mixture is approximately equal to that of the pressure mixture of the reference mixture, the fuel mixture contains as much of the additive fuel as the reference fuel mixture. If the pressure boiling of the fuel mixture is stone or less than the pressure boiling of the reference fuel mixture, the fuel mixture contains a higher or lower content of the additive fuel in the reference fuel mixture. results in a MAJOR pressure increase.
    According to an embodiment of the present invention, the control unit is adapted to provide information on corresponding pressure changes including the said time interval for several reference fuel mixtures with different grades of the additive fuel. In data cases, the control unit can accurately estimate the content of the additive fuel in one liter. The control unit can, for example, estimate that the content of the additive fuel in the fuel mixture is between two known levels of the additive fuel in the reference fuel mixture. Alternatively, the control unit can estimate a more precise value of the content of the additive fuel in the fuel mixture. In this case, the control unit, with the aid of the size of the packing ratio or the difference between the pressure boiling for the fuel mixture and the pressure boiling for the reference fuel mixture, can make such a more accurate estimate of the fuel mixture content of the additive fuel.
    According to an embodiment of the present invention, the control unit is adapted to provide information regarding the pressure change for the reference fuel mixture from previous operation of the combustion engine when it has been operated with the reference fuel mixture.
    Two high-pressure pumps of the same type do not have exactly the same properties. An older high-pressure pump can also have somewhat different properties in relation to the day. it was new. In the event that an fuel mixture is used that has a choice defined content of the additive fuel, the control unit can store the reference value regarding the pressure boiling during different operating cases for the specific high-pressure pump that pressurizes the fuel mixture. This can be done at regular intervals. Thus, the control unit always has access to the actual pressure boiling values which are achieved with the high-pressure pump for a reference mixture. Alternatively or in combination, more general pressure increase values for one or more reference fuel mixtures related to a certain type of high pressure pump may be available to the control unit.
    According to another preferred embodiment of the present invention, said time interval is a continuous period of time during which the high pressure pump pressurizes the fuel mixture. A high-pressure pump can have a design so that it pressurizes the fuel mixture intermittently. In this case, the control unit can compare the pressure increase of the fuel mixture during such a period of time with I / Arden on the pressure increase of the reference fuel mixture during a corresponding period of time with a corresponding high pressure pump. The high pressure pump can be a piston pump and the time interval is the time it takes for the high pressure pump to perform a compression stroke of the beansle mixture. Alternatively, the time interval can be related to several compression strokes or to the speed of the piston pump. A piston pump raises the pressure of the fuel mixture during the compression stroke while the fuel belt pressure is kept constant or becomes somewhat lower in the accumulator tank during the return stroke of the pump. The high pressure pump essentially fills a corresponding amount of the fuel mixture in the accumulator tank which is injected into the combustion engine.
    According to another preferred embodiment of the present invention, the control unit is adapted to control the combustion engine with information about the estimated content of the fuel mixture in the fuel mixture. The properties of the fuel mixture vary with the content of the additive fuel. The fuel mixture's content of the additive fuel affects e.g. the combustion process, the aftertreatment of the combustion engine exhaust gases and the engine oil. In this case, the control unit sMedes estimates the fuel mixture's content of the additive fuel before it is to be injected into the internal combustion engine. With this information, the control unit can provide a specific control of the internal combustion engine depending on the content of the fuel fuel mixture A. of the combustion process, the aftertreatment of the combustion engine exhaust gases and the engine oil obtain desired properties substantially independent of the fuel fuel content of the fuel mixture.
    According to another preferred embodiment of the present invention, the control unit is adapted to estimate the fuel mixture content of the additive fuel at certain operating conditions of the internal combustion engine. Under all operating conditions, it is not appropriate or possible to estimate the content of the additive fuel in the fuel mixture. Since the fuel mixture can essentially only obtain a marked change in the content of the additive fuel during refueling, it may be difficult to estimate the content of the additive fuel after each refueling or only in cases where refueling takes place with a fuel mixture which inhales an unknown content of the additive fuel. In order to obtain as good an estimate of the fuel mix's content of the additive fuel as possible, it is appropriate to carry out the estimate at certain operating occasions. The control unit can then be adapted to perform the said estimate in the event of operation when the high-pressure pump pump pressurizes a substantially maximum volume of the fuel mixture at the same time as no fuel is injected into the internal combustion engine. In this case, a maximum pressure boiling is obtained in the accumulator tank and thus the possibility of estimating the fuel mixture's content of the additive fuel with an optimal accuracy. With a maximum volume, a 100% filled pump stroke in a piston pump that carried a geometrically well-defined volume.
    According to another preferred embodiment of the present invention, the control unit is adapted to estimate the content of an additive fuel in a diesel fuel mixture. Diesel fuel today usually contains conventional diesel oil and some form of biodiesel as an additive fuel. Biodiesel is a propellant-like diesel that does not consist of petroleum products but of long chains of alkyl esters. Biodiesel is produced by transesterification of vegetable oils or animal fats and can be used alone or mixed with conventional diesel oil. The control unit may be adapted to estimate the content of the additive fuel FAME in the diesel fuel mixture. FAME at a collective name for biodiesel with mainly vegetable oils as raw materials. A form of FAME at RME made from rapeseed oil, methanol and potassium hydroxide.
    The above-mentioned object is also achieved with the facsimile of the kind mentioned in the introduction, which can be characterized by the features stated in the characterizing part of claim 11.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, by way of example, preferred embodiments of the invention are described with reference to the accompanying drawings, in which: Fig. 1 an arrangement for estimating a FAME diesel fuel mixture; Fig. 2 shows a graph with curves describing how the pressure can vary with time in an accumulator tank for two diesel fuel mixtures with different levels of FAME and Fig. 3 shows a flow chart describing a present invention.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION Fig. 1 shows an fuel injection system for an internal combustion engine in the form of a schematically indicated diesel engine I. The fuel injection system and the diesel engine 1 at advantageously mounted in a heavy vehicle. The fuel injection system at a so-called Corn- 6 mom Rail system and includes a fuel line 2 fdr all supply fuel from a fuel tank 3 to the diesel engine 1 cylinders. The fuel in this case is a diesel fuel mixture consisting of conventional diesel oil and FAME. FAME is a fuel produced by the transesterification of vegetable oils or animal fats.
    FAME is biodegradable and non-toxic. A fuel pump 4 is arranged in a branch line 2 to transport fuel from the fuel tank 3, via a filter 5, to a high pressure pump 6. The high pressure pump 6 is adapted to pressurize the fuel so that it is fed with a high pressure into an accumulator tank 7 consisting of a so-called Commom Rail. The high-pressure coil 6 comprises a piston which pressurizes the fuel during a compression stroke. The high fuel pressure in the accumulator tank 7 constitutes a driving cold for all possible injection of fuel with a high pressure in the diesel engine 1 and cylinders, respectively. For all control of the injection of the fuel, an injection means 8 is arranged in each of the connections between the accumulator tank 7 and the respective cylinders of the diesel engine 1. When an injector 8 is housed in a tipped bearing, fuel is sprayed with a high pressure in the respective cylinders. An electric control unit 9 is adapted to control the operation of the fuel pump 4, the high pressure pump 6 and the injection means 8. A pressure sensor 7a is mounted in the accumulator tank 7 to sense the pressure in the accumulator tank 7 and all true signals with information of the pressure value to the control unit 9.
    When the diesel engine I is started, the control unit 9 activates the fuel pump 4 and the high-pressure pump 6 so that all fuel with a high pressure is fed into the accumulator tank 7. The control unit 9 simultaneously activates the injection means 8 so that fuel with a high pressure injects into the diesel engine 1 and cylinders from the same. the accumulator tank 7. During operation of the diesel engine 1, the control unit 9 essentially continuously receives control signals regarding engine parameters such as, for example, load and speed. With the aid of this information, the control unit 9 calculates the amount of fuel that needs to be supplied to the cylinders of the diesel engine 1. The control unit 9 simultaneously receives information regarding the instantaneous pressure in the accumulator tank 7 from the pressure sensor 7a. With knowledge of the desired amount of fuel and the pressure in the accumulator tank 7, the control unit 9 can regulate the opening times for the respective injection means 8 so that an optimal amount of fuel is supplied to each of the diesel engine 1 cylinders at a correct time.
    Although FAME can be described as a diesel fuel, it has other properties than conventional diesel oil. FAME has, for example, a higher combustion temperature, a lower energy content and a higher refining temperature than conventional diesel oil.
    The fuel mixture burned in the diesel engine 1 thus all have a combustion temperature, an energy gap and an evaporation temperature which varies with the content of FAME in the fuel mixture. During operation of the diesel engine 1, e.g. give the internal combustion engine a Nig efficiency, reduce the formation of emissions during the combustion process, give the exhaust gases a suitable temperature so that they can obtain an optimal purification, in for example an oxidation catalyst, SCR catalyst, particulate filter, etc., and maintain a temperature of the engine oil so that fuel that is often mixed into the engine oil is evaporated. When refueling with diesel fuel in different countries, the content of FAME can vary in the diesel fuel. In a conventional injection system, the control unit 9 is adapted to control the injection of a diesel fuel mixture into a diesel engine with a fuel mixture containing a four-star content FAME. Is the industry mixture's content of FAME higher or lower obtained jute above desired properties in an optimal way.
    FAME also has a density, viscosity and compressibility that differ from the corresponding properties of conventional diesel oil. These different properties result in all FAME receiving a higher pressure than conventional diesel oil when a corresponding volume of FAME and conventional diesel oil is compressed.
    Fig. 2 shows with a thick solid line 10 how the pressure in the accumulator tank 7 can vary under different operating conditions of the diesel engine 1 for a reference fuel mixture containing a candle content x of FAME and a thinner solid line 11 hut the pressure in the accumulator tank 7 varies under a corresponding operation of diesel engine 1 with a fuel mixture containing a higher content x of FAME. During a first time period extending from time t1 to time t1, the pressure in the accumulator tank 7 rises. In this case, the entire stroke volume of the high pressure pump 6 is not used to pressurize the fuel in the accumulator tank 7. At time two, the fuel mixture has a lower pressure than the reference fuel mixture at the corresponding time. Increase in pressure in the accumulator tank. 7 occurs during the compression stroke of the high pressure pump 7 while the pressure is substantially constant or drops slightly during the return stroke of the high pressure pump. The temporary pressure drops in the accumulator tank 7 are essentially due to fuel being injected into the diesel engine I.
    At time t1, the fuel mixture and the reference fuel mixture carried the same pressure. It can thus be stated that the pressure of the fuel mixture has equaled more than the pressure of the reference fuel mixture during the time period two to ten. At time t1, a highest acceptable pressure knife in the accumulator tank 7 has been reached. The control unit 9 therefore controls the high-pressure pump 6 so that it only performs a relatively small operation during the time period t1 to t.2. The pressure drops according to curve 10 stepwise for the fuel mixture in the accumulator tank 7 and the reference fuel mixture. Curves 10 and 11 coincide during this time period. At time t2 a lowest acceptable pressure level is reached in the accumulator tank 7. During a third time period t2 to t3 the pressure in the accumulator tank 7 rises very rapidly. In this case, the entire stroke volume of the high-pressure pump 6 is used to pressurize the fuel in the accumulator tank 7 at the same time as no fuel is injected into the diesel engine 1. In this case, the control unit 9 can determine the pressure boiling Ap for each compression stroke of the high-pressure fuel pump 6 with information from the pressure sensor 7a. The compression stroke is necked during a time period somt which is related to the high pressure pump 6 speed.
    The control unit 9 may comprise stored information the pressure boiling Apo for the reference fuel mixture for a period of time vidt at a corresponding operating condition. This information has been advantageously obtained by the control unit 9 during previous operation, i.e. the diesel engine 1 has been operated with a fuel mixture which had a grade of FAME. Alternatively, the control unit 9 may have access to the appropriate pressure increase values Apo for a reference fuel mixture in another way.
    Fig. 3 is a flow diagram showing an example of a method for estimating the capability of FAME in a fuel mixture. The procedure starts at step 12. In order to obtain a fuel mixture containing FAME with as great an accuracy as possible, it is appropriate to compare the pressure increase for the industry mixture and the pressure increase for the reference fuel when they are as large as possible. Maximum pressure increases Apo for the fuel mixture is obtained during an operating case when the entire stroke volume of the high pressure pump 6 is used to pressurize the fuel mixture at the same time as no fuel is discharged from the accumulator tank 7 to the diesel engine. A different operating state is shown in Fig. 2 during the time period t2 to t3. The procedure is started with advantage when such an operating condition occurs first & again after the vehicle has been refueled. This can be done automatically or initiated by a driver of the vehicle with a light button or the like. The driver knows or suspects that the fuel mixture had a different content than the reference fuel mixture. At step 13, such a state of operation occurs and the control unit 9 receives the pressure value from the pressure sensor 7 regarding the pressure in the accumulator tank 7. The control unit 9 determines with the aid of the received pressure values of the pressure boiling Ap during the time period somt which thus corresponds to the time of a compression stroke. Advantageously, the mean value of the pressure boiling Ap is determined for several subsequent types of compression in order to determine the pressure boiling Ap with an optimum accuracy. At step 14, the control unit 9 receives information regarding a corresponding pressure increase Apo during the time period ft for the reference fuel mixture. This information can be stated above based on a previous operation of the diesel engine 1 with the reference fuel mixture which had a known content xo of FAME. The content xo of FAME can, for example, be 7%, which is the content of FAME in the diesel industry that is currently used in Sweden. At step 15, the control unit 9 calculates the ratio q between the pressure boiling Ap for the fuel mixture and the pressure apo Apo for the reference fuel mixture. Alternatively, the difference between the pressure boiling values can be determined. At step 16, the control unit 9 determines if the ratio q is within a range! which is defined by a lower spruce value qi which is slightly lower than 1 and a lower spruce value q2 which is somewhat lower than 1.
    If the pressure increase Ap for the fuel mixture belt corresponds to the pressure increase Apo for the reference fuel mixture, the ratio q becomes equal to 1. If the ratio is Mom the interval qi to q2, the control unit 9 is found, at step 17, that the fuel mixture in the acicumulator tank 7 has essentially the same content xo of FAME.
    At step 18, the control unit 9 provides a corresponding injection and operation ex ° of the fuel mixture as for the reference fuel mixture. The procedure then restarts, at step 12, when the vehicle is refueled for the next time.
    If the ratio q between the pressure increase Ap for the fuel mixture and the pressure increase Apo is not Mom the interval qi to q2, the procedure continues, at step 19. Has the control unit 9 estimates the ratio q at stone at the upper spruce value q2. If so, it is established, at step 20, that pressure boiling Ap for the fuel mixture should clearly stone in the pressure boiling Apo for the reference fuel mixture. This meant that the fuel mixture's content x of FAME was clearly higher than the reference fuel mixture's content xo of FAME. At step 21, the control unit 9 provides an injection of the fuel mixture and operation e, - of the diesel engine 1 sh that desired operating properties are obtained for a fuel mixture containing a higher content of FAME than the reference fuel mixture. The procedure then starts again, at step 12, the next time the vehicle is refueled.
    If the ratio q between the pressure boiling Ap fOr of the fuel mixture and the pressure boiling Apo of the reference fuel mixture is not at stone an q2, the control unit 9 is found that the ratio q must be less than the lower spruce value qi. The pressure boiling Ap of the fuel mixture Ap is thus clearly less than the pressure boiling Apo of the reference fuel mixture. At step 22, it is found that the content x of the fuel mixture x of FAME is stored in the content of the reference fuel mixture xo of FAME. At step 23, the control unit 9 provides an injection of the fuel mixture and operation ex_ of the diesel engine 1 so that desired operating characteristics are obtained for a fuel mixture containing a lower content of FAME than the reference fuel mixture. The procedure then starts onn, at step 12, in connection with the next time as the vehicle Lankas. With the present invention, optimal operating characteristics can be obtained substantially independently of the hahen FAME in the fuel mix.
    The invention is not limited to the embodiments described in the drawings but can be varied freely within the scope of the claims. 11
    权利要求:
    Claims (20)
    [1]
    1. determine the pressure change (Ap) in the accumulator tank (7) within a time interval (At) using the pressure value of the pressure sensor (7a), - provide information on a corresponding pressure change (Apo) for a reference fuel mixture with a cheek content of the auxiliary fuel within a corresponding time interval (At) and 2. aft estimate the fuel mixture content of the auxiliary fuel by comparing the pressure change (Ap) for the fuel mixture with the pressure change (Apo) for the reference fuel mixture.
    [2]
    Arrangement according to claim 1, characterized in that the control unit (9) is adapted to provide information in corresponding pressure changes (Apo) for several reference fuel mixtures with different levels of the additive fuel Mom a corresponding time interval (At).
    [3]
    Arrangement according to claim 1 or 2, characterized in that the control unit (9) is adapted to provide all the information regarding the pressure change (Apo) for the reference fuel mixture from previous operation of the internal combustion engine (1) as it is driven by the reference fuel mixture.
    [4]
    Arrangement according to any one of the preceding claims, characterized by the aforementioned time interval (At) constituting a continuous period of time during which the high-pressure pump (6) pressurizes the fuel mixture. 12
    [5]
    Arrangement according to claim 4, characterized in that the high-pressure pump (6) is a piston pump and that the time interval (At) constitutes the small part required for the high-pressure pump (6) to perform a compression stroke of the fuel mixture.
    [6]
    Arrangement according to one of the preceding claims, characterized in that the control unit (9) is adapted to control the combustion nozzles (1) with information about the estimated content of the additive fuel in the fuel mixture.
    [7]
    Arrangement according to one of the preceding claims, characterized in that the control unit (9) is adapted to estimate the fuel mixture content of the additive fuel at certain operating conditions of the combustion engine (1).
    [8]
    Arrangement according to hay 7, characterized in that the control unit (9) is adapted to perform said estimation at operating times when the pressure pump (6) pressurizes a maximum volume of the fuel mixture at the same time as no fuel is injected into the internal combustion engine (1).
    [9]
    Arrangement according to any one of the hazardous claims, characterized in that the control unit is adapted to estimate the content of an additive fuel in a diesel fuel mixture.
    [10]
    Arrangement according to claim 9, characterized in that the control unit is adapted to estimate the content of the additive fuel FAME in the diesel fuel mixture.
    [11]
    A method for estimating the content of an auxiliary fuel in a fuel mixture which drives an internal combustion engine (1), wherein the internal combustion engine (1) is provided with a fuel injection system comprising a fuel line (2) for supplying fuel to the internal combustion engine, a high pressure pump (6). which is adapted by the pressurized fuel in the fuel line (2), an accumulator tank (7) which is adapted to receive and store fuel Iran the high pressure pump (6) with a high pressure, a pressure sensor (7a) which is adapted to sense the pressure in the accumulator tank (7) and injection means (8) are adapted to inject the pressurized fuel contained in the accumulator tank (6) into the respective combustion chambers of the combustion engine, characterized in that the steps - to determine the pressure change (Ap) in the accumulator tank (7) within a time interval (At ) using the pressure value frail pressure sensor (7a), 13 to provide information about a corresponding pressure change (Apo) Mr a reference industry landing m ed a degree content of the additive fuel within a corresponding time interval (At) and to estimate the fuel mixture content of the additive fuel by comparing the pressure change (Ap) for the fuel mixture with the pressure change (Apo) Rh. the reference fuel mixture.
    [12]
    A method according to claim 11, characterized by the step of providing All information about corresponding pressure changes (Apo) for several reference fuel mixtures with different cheek contents of the additive fuel within a corresponding time interval (At).
    [13]
    Method according to claim 11 or 12, characterized by the step of providing all the information regarding the pressure change (Apo) for the reference fuel mixture from previous operation of the combustion engine (1) when it was operated with the reference fuel mixture.
    [14]
    A method according to any one of the preceding claims 11 to 13, characterized by the step of defining the time interval (.t) as a time period during which the high pressure pump (6) pressurizes the fuel mixture.
    [15]
    A method according to claim 14, wherein the high pressure pump (6) is a piston pump can be drawn by the step of defining the time interval (Att) as the time it takes for the high pressure pump (6) to perform a compression stroke of the fuel mixture.
    [16]
    A method according to any one of claims 11 to 15, characterized by the step of controlling the combustion engine (1) with information about the estimated content of the additive fuel of the fuel mixture.
    [17]
    A method according to any one of the preceding claims 11 to 16, characterized by the step of estimating the fuel mixture content of the additive fuel at determined operating conditions of the internal combustion engine (1).
    [18]
    A method according to claim 17, characterized by the step of performing said estimation at operating times when the high pressure pump (6) pressurizes a maximum volume of the fuel mixture while no fuel is injected into the internal combustion engine (1). 14
    [19]
    A method according to any one of the preceding claims 11 to 18, characterized by the step of estimating a diesel fuel mixture content of an additive fuel.
    [20]
    Process claim 19, characterized by the step of estimating the content of the additive fuel FAME of the diesel fuel mixture. - - 8 8 ----- Tf
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    同族专利:
    公开号 | 公开日
    EP2798179A1|2014-11-05|
    BR112014015870A8|2017-07-04|
    BR112014015870A2|2017-06-13|
    BR112014015870B1|2021-05-25|
    WO2013100844A1|2013-07-04|
    US20140366843A1|2014-12-18|
    SE537360C2|2015-04-14|
    EP2798179B1|2019-02-20|
    EP2798179A4|2015-01-28|
    CN104024607A|2014-09-03|
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    申请号 | 申请日 | 专利标题
    SE1151279A|SE537360C2|2011-12-28|2011-12-28|Arrangement and method for estimating a fuel mixture content of an auxiliary fuel|SE1151279A| SE537360C2|2011-12-28|2011-12-28|Arrangement and method for estimating a fuel mixture content of an auxiliary fuel|
    BR112014015870-3A| BR112014015870B1|2011-12-28|2012-12-20|arrangement and method for estimating a fuel blend content of a supplemental fuel|
    US14/368,090| US20140366843A1|2011-12-28|2012-12-20|Arrangement and method for estimating a fuel mixture's content of a supplementary fuel|
    PCT/SE2012/051443| WO2013100844A1|2011-12-28|2012-12-20|Arrangement and method for estimating a fuel mixture's content of a supplementary fuel|
    CN201280065023.XA| CN104024607A|2011-12-28|2012-12-20|Arrangement And Method For Estimating A Fuel Mixture's Content Of A Supplementary Fuel|
    EP12861833.7A| EP2798179B1|2011-12-28|2012-12-20|Arrangement and method for estimating a fuel mixture's content of a supplementary fuel|
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