WO2002065064A1 - Procede et systeme de determination de la capacite volumique d'un reservoir - Google Patents

Procede et systeme de determination de la capacite volumique d'un reservoir Download PDF

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Publication number
WO2002065064A1
WO2002065064A1 PCT/SE2002/000132 SE0200132W WO02065064A1 WO 2002065064 A1 WO2002065064 A1 WO 2002065064A1 SE 0200132 W SE0200132 W SE 0200132W WO 02065064 A1 WO02065064 A1 WO 02065064A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
volume capacity
vehicle
fuel tank
refuelling
Prior art date
Application number
PCT/SE2002/000132
Other languages
English (en)
Inventor
Nils-Gunnar VÅGSTEDT
Henric Nordlöf
Original Assignee
Scania Cv Ab (Publ)
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 Scania Cv Ab (Publ) filed Critical Scania Cv Ab (Publ)
Priority to DE10295969T priority Critical patent/DE10295969T5/de
Publication of WO2002065064A1 publication Critical patent/WO2002065064A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/80—Arrangements for signal processing
    • G01F23/802—Particular electronic circuits for digital processing equipment
    • G01F23/804—Particular electronic circuits for digital processing equipment containing circuits handling parameters other than liquid level
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/0084—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume for measuring volume
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
    • G01F9/008—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine where the other variable is the flight or running time

Definitions

  • the present invention relates to a method and system for determining the aggregate volume capacity of at least one fuel tank of a vehicle, according to the preambles to patent claims 1 and 5 respectively.
  • the state of the art provides arrangements for presenting the remaining fuel volume in a vehicle.
  • One problem of such systems is that when there is a change in the vehicle's fuel capacity, e.g. when the fuel tank is replaced or the vehicle is provided with an extra tank, information about the new fuel capacity has to be put into the vehicle's computer.
  • FR-2710743-A1 describes an arrangement for measuring in absolute terms the fuel quantity on board a vehicle. With that arrangement, fuel consumption while the vehicle is travelling can be calculated by means of information from a flowmeter. Information can also be obtained on how much fuel is taken on at each refuelling.
  • a disadvantage of that system is that it requires special arrangements for supplying information about how much fuel is taken on at each refuelling. It is proposed that a computer unit on the fuel pump at the filling station is connected to the vehicle's computer via a connection on the outside of the vehicle. This solution entails increased complexity and cost of the system, because of involving further components.
  • Another proposal is that immediately after refuelling the driver puts manually into the vehicle's computer information about the quantity taken on. This proposal has the disadvantage of increasing the driver's workload, and the risk of incorrect or no input is also not insignificant.
  • One object of the invention is to provide a method and a system by which it is possible to identify a change in the fuel volume capacity of a utility vehicle.
  • Another object of the invention is to improve the accuracy of information based on signals from a fuel level sensor in a vehicle.
  • the system according to the invention preferably comprises means of volume change determination for determining the aggregate volume capacity of at least one fuel tank when there is a change of capacity. This eliminates the need, on the occasion of tank replacement or addition, to put corresponding information into the vehicle's computer from some external source.
  • a correlation is preferably determined between information from the fuel level sensor and information about the ratio between residual quantity of fuel and full quantity of fuel, on the basis of information from the fuel level sensor and information about how much fuel is consumed between a full refuelling of the vehicle and a subsequent refuelling. This means that the system can itself improve the accuracy of one of its own functions. The presentation to the driver of the residual fraction of full fuel quantity is also improved.
  • Fig. 1 depicts schematically an embodiment of a system according to the invention
  • - Fig. 2 depicts schematically a cross-sectional view of a fuel tank
  • Fig. 3 shows two scales for residual fraction of full fuel quantity
  • Fig. 4 shows two scales for residual fraction of full fuel quantity.
  • Fig. 1 depicts a system for fuel volume calculation for a utility vehicle, such as a truck. This system can also be used on other types of vehicles such as buses, passenger cars and work vehicles.
  • the system incorporates a fuel level sensor FS situated in a fuel tank FT of the vehicle.
  • the vehicle may be equipped with one or more fuel tanks.
  • the fuel level sensor FS is connected to a central computer unit CU which has calculation means and data storage means.
  • a fuel level indicator FLM and a fuel information display FDD both of them connected to the computer unit CU.
  • the system also comprises a torque sensor TS connected to the computer unit CU and arranged to send signals corresponding to the engine's torque.
  • the vehicle is designed to be capable of being equipped with various tank alternatives for fuel storage. Some of these tank alternatives may refer to cases where the vehicle is equipped with one fuel tank which may be of various sizes. Another tank alternative may refer to cases where the vehicle is equipped with two or more tanks, with certain size alternatives and in various combinations.
  • the computer unit CU stores information about a number (n) of possible values Vj, Vj/, ...., V render, each of which corresponds to the value of the aggregate fuel volume capacity of one of the tank alternatives.
  • the present invention makes it possible to determine the fuel volume capacity of the vehicle. This is done without having to input any information from an external source.
  • An advantage of the invention is that replacing one tank by another, followed by automatic determination of the new tank volume, can be carried out without external operations.
  • the system comprises means for determining how much fuel the vehicle consumes.
  • the computer unit CU receives from the torque sensor TS information on the basis of which the fuel consumption rate is calculated.
  • the vehicle may be equipped with a flowmeter which is situated in a fuel line between the tank FT and the engine and which is connected to the computer unit CU to provide the fuel consumption rate. Integration which takes place either continuously or at frequent intervals provides information on how much fuel V c is consumed after the first refuelling T ⁇ . Information on the fuel quantity consumed V c is updated and stored progressively as it is renewed.
  • the system incorporates means for determining the fraction of remaining fuel in the tank FT.
  • This means may include the computer unit CU and the fuel level sensor FS, in which case the computer unit CU continuously receives from the fuel level sensor FS signals on the basis of which a residual fuel quantity fraction R is calculated.
  • the residual fuel quantity fraction R is merely a relative value, i.e. a fraction of the full fuel quantity, e.g. one-quarter, and information about it is updated and stored continuously by the computer unit CU.
  • the computer unit CU determines that a refuelling is taking place.
  • the signal from the fuel level sensor FS changes considerably more quickly when the vehicle is being refuelled than when the vehicle is travelling.
  • the computer unit CU can calculate the rate of change of the signal and determine that refuelling is taking place if the rate of change exceeds a predetermined value.
  • the computer unit CU also determines the residual fuel quantity fraction R when the second refuelling E 2 begins. This may be done by the computer unit comparing successive stored values for the residual fuel quantity fraction R.
  • the computer unit CU does a first calculation of the total volume capacity V t ⁇ .
  • V t ⁇ V c ⁇ /(l - R ⁇ ), where V ci is the value of the fuel quantity consumed between the first refuelling T ⁇ and the second refuelling E .
  • V c ⁇ is matched by the respective value of V c on the occasion of the second refuelling T % .
  • the result of the first calculation of the total volume capacity V ⁇ is stored.
  • the computer unit CU selects, as a first assumption about the aggregate volume capacity of the vehicle's fuel tank, whichever of the stored possible values V ⁇ , Vu, ...., V render, is closest to the first calculation V ⁇ .
  • V 2 V c2 /(l - R 2 ), where V c2 and R 2 are new values of the fuel quantity consumed between the second refuelling T and the third refuelling E 3 and the residual fuel quantity fraction R at the beginning of the third refuelling.
  • V c2 and R 2 are new values of the fuel quantity consumed between the second refuelling T and the third refuelling E 3 and the residual fuel quantity fraction R at the beginning of the third refuelling.
  • the result of the second calculation of the total volume capacity V 2 is stored.
  • a second assumption about the aggregate fuel capacity of the vehicle's fuel tank is made. With a view to improved accuracy, the second assumption is made on the basis of both the first calculation of the total volume capacity V ⁇ and the second V .
  • the assumption may be made by selecting whichever of the possible stored values Vj, V JJ ...., V render, is closest to the average value of V ⁇ and V 2 .
  • the result at each repeat of the method is a new calculation of the volume capacity. Better accuracy of the assumption about the volume capacity of the fuel tank can thus be achieved.
  • Such stored calculated volume capacity values are used on the occasion of each new assumption. If an average of these values is used for the assumption, it is possible in the average value calculation for the calculated values to be weighted, e.g. depending on how large a volume is taken on, when calculating each volume capacity.
  • a capacity calculated when taking on the relatively small refuelling volume may be assigned a smaller weight than one calculated on the occasion of a larger refuelling, since the accuracy may be inferior in the case of small tank volumes.
  • the volume capacity assumption results may be used, via the fuel information display FID, to inform the vehicle driver about the volume capacity.
  • Fig. 1 this appears in the top row of the fuel information display FID. Comparing the assumption about the total volume capacity with information about the fuel level makes it possible, e.g. while the vehicle is travelling, for information to be provided about the remaining fuel volume. In Fig.1 this appears in the bottom row of the fuel information display FID.
  • Each iteration, or renewed assumption about the volume capacity on the occasion of a refuelling preceded by a full refuelling, is conducted as above. If the previous refuelling was not a full refuelling, a calculation of the volume capacity F would be misleading and should not be used as the basis for a new assumption about the volume capacity.
  • a refuelling is not a full refuelling, this fact has to be determined. Such determination may be based on the fact that the fuel level sensor does not indicate full when the refuelling ends. A new assumption about the volume capacity is preferably omitted on the occasion of a refuelling which follows a refuelling which was not a full refuelling.
  • the system may therefore include a function which, when there is no "full" indication on the occasion of a predetermined number of successive refuellings, informs the vehicle driver that the fuel level sensor is out of action.
  • volume capacity F value calculated after any refuelling deviates substantially from previous calculations and/or assumptions, this suggests one of the following alternatives: i) previous refuelling was not a full refuelling, ii) faulty fuel level sensor, or iii) a change in aggregate volume capacity.
  • alternative i this was preferably already determined at the time of the previous refuelling, as described above.
  • alternative ii i.e. faulty fuel level sensor, this may be determined as described above.
  • the computer unit CU preferably determines that alternative iii) applies. This may mean that the fuel tank or, if the vehicle is provided with two or more, one or more of them has/have been changed or a further fuel tank has been fitted. If it is determined that the aggregate volume capacity has changed, a new series of assumptions of the new volume capacity begins as described above. It should be noted that no information from any external source is required in this respect. More specifically, there is no need for any reprogramming of the system when the volume capacity changes, since the system itself detects the volume change and determines for itself the new volume capacity.
  • the invention may be used not only for determining the fuel volume capacity but also for improving the accuracy of information on the basis of the fuel level sensor FS. This results in more correct presentation on the fuel level indicator FLM. On the occasion of each new assumption about the volume capacity during the repeated process described above, a value for the residual fuel quantity fraction and a value for the quantity of fuel consumed since the previous refuelling are obtained. Correction of the fuel level scale can be done on the basis of these two values.
  • Figs. 2, 3 and 4 show a simple example to illustrate a function for improving the accuracy of information on the basis of the fuel level sensor FS.
  • a vehicle is provided with a fuel tank FT which extends between two parallel walls and has a cross-section according to Fig. 2.
  • a fuel level sensor FS situated in the tank is arranged to emit a signal which corresponds to a linear relationship between the fuel level and the fuel quantity, as illustrated by the upper scale in Fig. 3.
  • the lower scale in Fig. 3 corresponds to the information obtained after correcting the signal from the fuel level sensor FS.
  • the remaining fuel quantity is 130 litres. It may then be assumed that the residual fuel quantity fraction Ri is 13/30.
  • the residual fuel quantity fraction scale may then be corrected as shown in the lower scale in Fig. 4. Here the value at the respective reading point has been altered from Vi to 13/30, and linear adaptation is applied in both directions from the reading point. It is also conceivable for the whole scale to be adapted to a non-linear curve.
  • new adjustments can be done at further points on the scale in the same manner as above. Subsequent adjustments are preferably applied only within the portion of the scale which contains the respective adjustment points and is bounded by earlier adjustment points situated closest to the relevant adjustment point.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention porte sur un procédé et un système de détermination de la capacité volumique d'un réservoir d'essence (FT) d'un véhicule équipé d'un capteur de niveau d'essence (FS) situé à l'intérieur du réservoir d'essence (FT). Un nombre (n) de valeurs possibles connues (VI, VII, , Vn) de la capacité volumique sont stockées. La quantité d'essence (Vc1) consommée entre le plein du véhicule et le plein suivant est déterminée. Le rapport entre la quantité résiduelle d'essence et la quantité maximale d'essence au début du plein suivant est déterminé. Une valeur (V1) de la capacité volumique totale du réservoir d'essence est calculée sur la base de la quantité d'essence consommée entre les deux pleins et dudit rapport. Une estimation est faite en fonction de la valeur calculée (V1), estimation dont le but est de déterminer laquelle des valeurs possibles connues (VI, VII, , Vn) correspond à la capacité volumique totale du réservoir d'essence. Ce procédé est répété chaque fois que le plein est fait, et de nouvelles estimations améliorées concernant la capacité volumique sont faites en fonction d'autres valeurs calculées de cette capacité.
PCT/SE2002/000132 2001-02-12 2002-01-28 Procede et systeme de determination de la capacite volumique d'un reservoir WO2002065064A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10295969T DE10295969T5 (de) 2001-02-12 2002-01-28 Verfahren und System zur Bestimmung des Tankvolumens

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0100436-5 2001-02-12
SE0100436A SE518469C2 (sv) 2001-02-12 2001-02-12 Förfarande och system för fastställande av tankvolym

Publications (1)

Publication Number Publication Date
WO2002065064A1 true WO2002065064A1 (fr) 2002-08-22

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Application Number Title Priority Date Filing Date
PCT/SE2002/000132 WO2002065064A1 (fr) 2001-02-12 2002-01-28 Procede et systeme de determination de la capacite volumique d'un reservoir

Country Status (3)

Country Link
DE (1) DE10295969T5 (fr)
SE (1) SE518469C2 (fr)
WO (1) WO2002065064A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105181086A (zh) * 2015-08-28 2015-12-23 惠州华阳通用电子有限公司 一种汽车油量检测方法和装置
CN110455377A (zh) * 2019-07-23 2019-11-15 东风柳州汽车有限公司 燃油车续航里程显示匹配台架及试验方法
WO2023036862A1 (fr) 2021-09-10 2023-03-16 Zealand Pharma A/S Procédé de formulation de compositions comprenant des analogues de peptide 2 de type glucagon (glp-2)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013001887A1 (de) * 2013-02-02 2014-08-07 Audi Ag Verfahren und Tankerkennungsvorrichtung zum Feststellen eines Tankvorgangs eines Fahrzeugs
DE102015218640A1 (de) 2015-09-28 2017-03-30 Volkswagen Aktiengesellschaft Verfahren zur direkten oder indirekten Kommunikation zwischen einem Kraftfahrzeug und wenigstens einer fahrzeugexternen Energieversorgungseinheit für das Kraftfahrzeug in Zusammenhang mit einem Energieversorgungsvorgang
DE102015218641A1 (de) 2015-09-28 2017-03-30 Volkswagen Aktiengesellschaft Verfahren zur direkten oder indirekten Kommunikation zwischen einem Kraftfahrzeug und wenigstens einer fahrzeugexternen Energieversorgungseinheit für das Kraftfahrzeug in Zusammenhang mit einem Energieversorgungsvorgang

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244210A (en) * 1978-12-26 1981-01-13 Itt Industries, Inc. Combined fuel level and fuel consumption indicator
US4611287A (en) * 1982-08-16 1986-09-09 Nissan Motor Company, Limited Fuel volume measuring system for automotive vehicle
US6002328A (en) * 1996-03-15 1999-12-14 Vdo Adolf Schindling Ag Tank display system and method for determining the remaining volume in a tank
DE10021721A1 (de) * 1999-05-04 2001-03-15 Ssi Technologies Inc Treibstoffoptimierungssystem mit verbessertem Treibstoffpegelsensor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244210A (en) * 1978-12-26 1981-01-13 Itt Industries, Inc. Combined fuel level and fuel consumption indicator
US4611287A (en) * 1982-08-16 1986-09-09 Nissan Motor Company, Limited Fuel volume measuring system for automotive vehicle
US6002328A (en) * 1996-03-15 1999-12-14 Vdo Adolf Schindling Ag Tank display system and method for determining the remaining volume in a tank
DE10021721A1 (de) * 1999-05-04 2001-03-15 Ssi Technologies Inc Treibstoffoptimierungssystem mit verbessertem Treibstoffpegelsensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105181086A (zh) * 2015-08-28 2015-12-23 惠州华阳通用电子有限公司 一种汽车油量检测方法和装置
CN110455377A (zh) * 2019-07-23 2019-11-15 东风柳州汽车有限公司 燃油车续航里程显示匹配台架及试验方法
WO2023036862A1 (fr) 2021-09-10 2023-03-16 Zealand Pharma A/S Procédé de formulation de compositions comprenant des analogues de peptide 2 de type glucagon (glp-2)

Also Published As

Publication number Publication date
SE0100436L (sv) 2002-08-13
SE518469C2 (sv) 2002-10-15
SE0100436D0 (sv) 2001-02-12
DE10295969T5 (de) 2004-04-15

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