EP2095109A1 - Procede pour identifier un carburant de vehicule automobile et vehicule automobile permettant la mise en uvre de ce procede - Google Patents
Procede pour identifier un carburant de vehicule automobile et vehicule automobile permettant la mise en uvre de ce procedeInfo
- Publication number
- EP2095109A1 EP2095109A1 EP07858582A EP07858582A EP2095109A1 EP 2095109 A1 EP2095109 A1 EP 2095109A1 EP 07858582 A EP07858582 A EP 07858582A EP 07858582 A EP07858582 A EP 07858582A EP 2095109 A1 EP2095109 A1 EP 2095109A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- viscosity
- base
- fuel
- gox
- 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- Withdrawn
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 83
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 13
- 238000004088 simulation Methods 0.000 claims abstract description 11
- 239000002199 base oil Substances 0.000 claims description 51
- 238000010790 dilution Methods 0.000 claims description 43
- 239000012895 dilution Substances 0.000 claims description 43
- 230000008929 regeneration Effects 0.000 claims description 11
- 238000011069 regeneration method Methods 0.000 claims description 11
- 239000013626 chemical specie Substances 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 3
- 239000010705 motor oil Substances 0.000 abstract description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 7
- 238000010926 purge Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000004071 soot Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 229910052815 sulfur oxide Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 235000000112 undernutrition Nutrition 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2888—Lubricating oil characteristics, e.g. deterioration
Definitions
- the present invention relates to a method for identifying a fuel.
- the invention allows in particular to involve the type of fuel in a maintenance interval prediction program calculating the number of kilometers after which a motor oil change should be performed.
- the invention finds a particularly advantageous application with diesel type vehicles.
- regenerations or purge phases
- These regenerations are often characterized by the use of post-injection, that is to say, a late injection which is performed during the relaxation, after the main combustion. This late injection makes it possible to maintain the hot exhaust gases and / or a sufficient mixture richness.
- post-injection is required to heat the exhaust gases to a temperature level sufficient to achieve the combustion of carbon soot retained on the filter.
- the purge phases of the nitrogen oxides contained in the NOx traps it is a question of carrying out a late injection in order to cause a quasi-total consumption of the oxygen of the exhaust gases making it possible to bring the wealth of the exhaust gas passing through the catalyst beyond 1.
- the post-injection levels must both make it possible to mount the exhaust gases at high temperatures (above 65O 0 C) and at a richness of air mixture.
- the oil dilution rate measured after 20000kms on "serial" applications is generally between 4 and 6%.
- a vehicle engine comprising a particulate filter and a nitrogen oxide trap is even more strongly subject to the phenomenon of dilution of the lubricating oil, because of the high frequency of NOx purges that must be put in place. to maintain the catalyst efficiency (on average one purge every 1 to 3 minutes) and the need to add sulphate purge phases.
- the dilution of the oil with diesel reduces the viscosity of the oil.
- the drop in viscosity causes a drop in oil pressure with a risk of undernourishment and thus seizing of a lubricated element.
- a drop in viscosity also causes a risk of thinning oil films that can cause premature wear of lubrication members.
- the drop in viscosity causes an acceleration of oil aging (oxidation), corrosion of materials that can deteriorate the oil circuit leakage, as well as a dilution of the additive concentrations in the oil of the oil. lubrication with a risk of reducing the performance of the oil.
- oil maintenance algorithms engine were developed to calculate, based on the engine parameters, the dilution rate of the oil. However, these algorithms do not take into account the fuel used in the engine.
- the invention therefore proposes to take into account the fuel variability on the viscosity drop of the engine oil due to dilution by the fuel.
- the nature of the fuel is determined through the calculation of viscosities of the engine oil, themselves determined by oil pressure measurements.
- the model for estimating the oil dilution ratio which is calibrated by default for a fuel and a reference oil, is then adapted to the fuel and oil actually used by the engine.
- the invention therefore relates to a method for identifying a basic fuel supplying an engine of a vehicle equipped with a polluting chemical species trap, the moving parts of this engine being lubricated by means of a base oil, characterized in that it comprises the following steps: - calculating a variation in viscosity of the base oil after a number z of kilometers traveled, this variation in viscosity being due to the dilution of the base oil with the base fuel during trap regeneration phases, this viscosity variation being calculated from base oil pressure measurements, a linearity relationship existing between measured pressure and base oil viscosity,
- to calculate the viscosity variation of the base oil it comprises the following steps:
- the calculation of the initial viscosity of the base oil is performed after a first engine start that occurs after a drain.
- to calculate by simulation the variation of viscosity of the reference oil it comprises the following steps: - calculate by simulation a dilution ratio of the reference oil by the reference fuel after z kilometers traveled , and
- to identify the base fuel it comprises the following steps:
- the identifier contained in the table is
- the invention also relates to a motor vehicle comprising a motor powered by a base fuel, the engine being equipped with a polluting chemical species trap, the moving parts of this engine being lubricated by a base oil, this base oil being pressurized by means of an oil pump characterized in that it comprises:
- FIG. 1 a schematic representation of a structure of a vehicle according to the invention
- FIG. 2 a diagram of steps of the method according to the invention making it possible to determine the nature of the fuel used
- FIG. 3 a graphical representation of the linear relationship between the viscosity of an oil and the dilution ratio of this oil, for different temperatures;
- Figure 4 a table establishing a correspondence between fuels from different countries and coefficients characterizing them.
- FIG. 1 shows a schematic representation of a vehicle 1 having a motor 2 powered by a basic fuel 3 called GOx.
- the moving parts of this engine 2 are lubricated by a base oil 4 which is pressurized by means of an oil pump 7.
- the vehicle 1 is equipped with a trap 5 with polluting chemical species, such as a NOx trap or SCR (Selective Catalyst Reduction in English), or a particulate filter, disposed in its exhaust line.
- the oil 4 is diluted during the post-injection phases to regenerate the trap 5.
- late base fuel injections for the regeneration of the trap 5 cause a fuel introduction into the fuel. oil film deposited inside the engine cylinders and returned to the oil tank.
- the vehicle 1 comprises a computer 6.
- This computer 6 comprises a data memory 9, a program memory 10 and a microprocessor 11 connected together by a data bus 12.
- the memory 10 comprises a program 10.1 to calculate the number of kilometers after which the dilution of the base oil 4 by the base fuel GOx is such that the oil 4 should be changed.
- Input parameters of this program are the type of the base oil and the type of the basic fuel because, as we have seen, the dilution ratio of the base oil depends strongly on the fuel type. used.
- the computer 5 executes a program 10.2, preferably after the first start following a drain of the base oil 4.
- This program 10.2 generates the measurement of the pressure of the base oil 4 using a sensor 15 for different temperatures between 60 and 90 degrees.
- V o (T) viscosity values of the base oil 4 for these different temperatures are calculated from these pressure values. These viscosity calculations are made from a linear relationship existing between the pressure of the base oil 4 and the viscosity of this oil. In order for this linearity relation to exist, the oil pump 7 is not regulated during oil pressure measurements, that is to say that its control valve is open.
- the computer 6 executes a program 10.2 for determining the type of GOx fuel base used.
- the different steps of this program 10.2 are shown in FIG.
- a real measurement of the variation of viscosity A ⁇ zkm (GOx, ⁇ ) of the base oil 4 after z kms of rolling e.g.
- a ⁇ zkm ⁇ GOx, ⁇ ) which is worth ⁇ zkm ⁇ GOx, ⁇ ) - ⁇ o (T).
- a ⁇ zkm [GOx, T) ⁇ G0x * Ct (GOx, T)
- ⁇ G0x being the dilution ratio of the base oil 4 by the base fuel GOx obtained after z kilometers traveled
- (GOx) being the guiding coefficient of the linear viscosity-dilution ratio of the base oil 4 for the GOx base fuel.
- T GOPSA is calculated by simulation by the computer 6 from the characteristics 9.2, 9.3 of the reference oil contained in the memory 9 and GOPSA reference fuel, as well as from the number of kilometers traveled z. Moreover, Ct (GOPSA) for the reference oil is known and also stored in the memory 9. Then, in a step 23, the ratio between the viscosity variation of the base oil and the viscosity variation of the reference oil is calculated.
- the table in Figure 4 ensures the correspondence between the type of base fuel used (in other words, its country of origin) and the aforementioned coefficients ⁇ x and y 2 .
- ⁇ 1 is 15.4% and ⁇ 2 is 146.6%, so the product (1 - ⁇ y 2 is 1.240.) Only some countries have been shown in this table. between coefficients and countries exist for all the countries of the world.
- the maintenance program 10.1 has the type of oil 4 and the type of GOx fuel and can then predict the engine oil maintenance interval to report to the driver.
- the method of identifying the GOx base fuel according to the invention has been described in the context of use with a program for calculating the maintenance interval of the engine oil.
- the invention could also be used with a program involving the fuel type in calculating the engine consumption, in order to estimate, for example, a range of the vehicle.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0654576A FR2907902B1 (fr) | 2006-10-26 | 2006-10-26 | Procede pour identifier un carburant de vehicule automobile et vehicule automobile associe |
| PCT/FR2007/052155 WO2008050034A1 (fr) | 2006-10-26 | 2007-10-15 | Procede pour identifier un carburant de vehicule automobile et vehicule automobile permettant la mise en œuvre de ce procede |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2095109A1 true EP2095109A1 (fr) | 2009-09-02 |
Family
ID=38057601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07858582A Withdrawn EP2095109A1 (fr) | 2006-10-26 | 2007-10-15 | Procede pour identifier un carburant de vehicule automobile et vehicule automobile permettant la mise en uvre de ce procede |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2095109A1 (fr) |
| BR (1) | BRPI0715314A2 (fr) |
| FR (1) | FR2907902B1 (fr) |
| WO (1) | WO2008050034A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11101153A (ja) * | 1997-09-26 | 1999-04-13 | Zexel:Kk | 燃料噴射制御装置 |
| US6343571B1 (en) * | 1998-12-17 | 2002-02-05 | Clean Fuels Technology, Inc. | Fuel emulsion detection method and system for an electronically controlled engine |
| FR2866957B1 (fr) * | 2004-02-27 | 2006-11-24 | Peugeot Citroen Automobiles Sa | Systeme de determination du taux de dilution d'huile de lubrification d'un moteur thermique de vehicule automobile |
-
2006
- 2006-10-26 FR FR0654576A patent/FR2907902B1/fr not_active Expired - Fee Related
-
2007
- 2007-10-15 BR BRPI0715314-7A patent/BRPI0715314A2/pt active Search and Examination
- 2007-10-15 EP EP07858582A patent/EP2095109A1/fr not_active Withdrawn
- 2007-10-15 WO PCT/FR2007/052155 patent/WO2008050034A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008050034A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2907902B1 (fr) | 2009-01-30 |
| BRPI0715314A2 (pt) | 2013-07-09 |
| WO2008050034A1 (fr) | 2008-05-02 |
| FR2907902A1 (fr) | 2008-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| 17P | Request for examination filed |
Effective date: 20090401 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: EL FASSI, MEHDI Inventor name: CREPEAU, GERALD |
|
| DAX | Request for extension of the european patent (deleted) | ||
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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| 18D | Application deemed to be withdrawn |
Effective date: 20100929 |