CN102227495A - Device for removing components of operating fluid for motor vehicles - Google Patents

Device for removing components of operating fluid for motor vehicles Download PDF

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Publication number
CN102227495A
CN102227495A CN2009801473118A CN200980147311A CN102227495A CN 102227495 A CN102227495 A CN 102227495A CN 2009801473118 A CN2009801473118 A CN 2009801473118A CN 200980147311 A CN200980147311 A CN 200980147311A CN 102227495 A CN102227495 A CN 102227495A
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CN
China
Prior art keywords
working fluid
composition
engine oil
reagent
transmitter
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.)
Pending
Application number
CN2009801473118A
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Chinese (zh)
Inventor
A.根斯勒
M.格勒克勒
M.赫尔尼尔
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CN102227495A publication Critical patent/CN102227495A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0008—Working-up used lubricants to recover useful products ; Cleaning with the use of adsorbentia
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0016—Working-up used lubricants to recover useful products ; Cleaning with the use of chemical agents
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0091—Treatment of oils in a continuous lubricating circuit (e.g. motor oil system)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/252—Diesel engines
    • C10N2040/253—Small diesel engines

Abstract

The invention relates to a device for removing components of an operating fluid for motor vehicles, comprising an inlet opening and an outlet opening for the operating fluid and comprising a container for an agent suitable for converting the components that is positioned between the inlet opening and the outlet opening in the flow direction of the operating fluid. According to the invention, the agent effects a cracking reaction and/or an oxidation of the component.

Description

Be used to remove the device of composition of the working fluid of automobile
The present invention relates to a kind of device of composition of the working fluid that is used to remove automobile by independent claim as described in the preamble, the method for composition that comprises the system of this device and be used to remove the working fluid of automobile.
Because the fossil energy carrier only provides in restricted scope for using, so commercial now general fuel comprises the hotchpotch of biogenic fuel composition.Its meaning is also obtaining increase aspect the saving that becomes more and more important under discussion of Carbon emission.At this, use so-called biofuel more, especially work as it and use burning in other words to be evaluated as when aspect forming carbonic acid gas, being the income neutral.
For example add the ester of the frequent undersaturated lipid acid of long-chain to diesel oil fuel as biological hotchpotch.In addition, for example so-called biofuel of pure biofuel is also disclosed.The disclosed typical example of this biofuel is rape oil methyl esters (RME) or beans methyl esters (SME) in this way.The biogenic hotchpotch of ethanol or other alcohols form is set in the field based on the fuel of gasoline at present.
Yet biofuel is compared with the fuel of the enhanced aged minal that decomposition by oxidation causes, and-at ester during-compare with the hydrolytic scission thing extraly as biological additive.At this, formed cofree to a great extent carbonic acid as final product, carbonic acid plays with respect to metallic substance and carries the corrosive effect and help forming deposition.
From the ester of the long-chain of biology, obtained another problem, because this ester is in lubricating oil and especially saturated in the engine oil of automobile.The reason of process is the higher identical boiling point of the oil component of the ester of long-chain and engine oil hereto, thereby observes even when temperature was higher, the ester of long-chain also had only very little rate of discharge in the engine oil.
Though the fuel composition of mineral also enters in the engine oil; But because this composition of its lower boiling point stays the short time in engine oil.Kept biological composition.
For the alkaline in other words composition of undesirable acidity of removing engine oil, for example disclose and had acidity or alkaline functional group by DE 101 07 034, be used in the system that guides engine oil and material combination and the undesirable material of decomposition, for example zeolite.Described material is integrated in the material of corresponding oil strainer.
Summary of the invention
Task of the present invention provides a kind of in other words method of a kind of device, installs method in other words with this and can and as far as possible fully remove undesirable composition of the working fluid of automobile from working fluid in simple mode.
Be resolved in an advantageous manner by means of a kind of in other words system and a kind of method that is used to provide the relevant work fluidic to comprise described device of the described a kind of device of the characteristic features with independent claim based on task of the present invention.
For this reason, the device that is used to remove undesirable composition of working fluid accordingly comprises that this reagent causes dissociative reaction or the oxidation that is included in the undesirable composition in the working fluid by inlet outlet in other words and among the corresponding work fluid is in contacting of water conservancy diversion and device that have the container that is used for reagent.
If the especially biological hotchpotch of undesirable composition of engine oil or hydraulic efficiency oil stands dissociative reaction, formed the compound that has than short chain length at this so, this compound can separate simply.Particularly advantageous is to use zeolite as the division material, though this zeolite causes the dissociative reaction of undesirable composition, on the other hand not to the engine oil compound generation effect of the long-chain of hydraulic efficiency oil in other words.
Scheme as an alternative, described device also can comprise the material of oxygenizement as reagent.At this, potassium permanganate is specially suitable, and potassium permanganate for example is carried on the fixed carrier, for example on zeolite, silica gel or the clay.If potassium permanganate is placed the inside of crystalline network, so also can very guarantee effectively that undesirable composition of the only short chain of described working fluid stand the oxidation of chemistry at this, however working fluid in other words the composition of the comparison long-chain of engine oil without undergoing chemical oxidation.
In the chemical oxidation that causes by reagent, finally formed ketone carbonic acid in other words.Because the ketone of the short chain that occurs when the undesirable composition of oxidation cleavage has lower boiling point, so ketone can easily be overflowed the engine oil from working fluid in other words.The same carbonic acid that forms in division equally partly has lower boiling point and can leave engine oil by this way equally.
The theme that other favourable embodiment of the present invention is a dependent claims.
Advantageously, the relevant work fluidic system that is used to accordingly automobile is provided also has and is used to absorb the alkalescence of working fluid or the mechanism of tart composition except already mentioned device.Can absorb the carbonic acid that especially when undesirable integral part of oxygenolysis working fluid, occurs by this way extraly and thus carbonic acid is taken out the hydraulic efficiency oil in other words from engine oil with higher.
According to particularly advantageous embodiment of the present invention, be used to provide corresponding work fluidic system to have transmitter extraly, this transmitter is used for determining undesirable composition of related working fluid.This transmitter is for example determined the concentration of corresponding composition with optical or electrochemical mode.The detection that can be in operation by this way, whether the device that is used for removing from working fluid undesirable composition accordingly also works with enough degree, this device of perhaps whether must replacing regenerating in other words.
Description of drawings
Embodiments of the present invention are shown in the drawings and explain in detail in the following description.Wherein:
Fig. 1 is used to the synoptic diagram that automobile provides the system of working fluid, especially guides the system of engine oil, and it comprises the exemplary embodiment by device of the present invention,
Fig. 2 is the synoptic diagram according to the transmitter that is used for testing fluidic constituent concentration of first embodiment, and
Fig. 3 is the synoptic diagram according to the transmitter that is used for testing fluidic constituent concentration of second embodiment.
Embodiment
System based on the exemplary below guiding work oil as automobile of the device of the composition of the working fluid that is used to remove automobile of the present invention makes an explanation.Fig. 1 shows the system 10 of guiding work oil or engine oil, and this system for example comprises oil pan 12.For example store engine oil in this oil pan, engine oil is by in the intake line 14 input oil engines 16.For this reason, at first by means of oil pump 18 engine oil is pumped into oil strainer 20 places, wherein this oil strainer is particularly useful for removing solid particulate, and this solid particulate for example causes as the mechanical wear of oil engine 16.In addition, the system 10 of guiding engine oil comprises return pipeline 22, engine oil can be returned input oil pan 12 from oil engine 16 with this return pipeline.
At the run duration of oil engine 16, the part of the fuel of input oil engine 16 enters in the engine oil and enters thus in the system 10 of guiding engine oil.For example have more lower boiling material if relate at this, this material is overflowed when working temperature is higher automatically so.
If relate to especially biogenic high boiling composition yet be diffused into the fuel hotchpotch that enters into engine oil in other words, this fuel hotchpotch just remains in the engine oil at run duration so.Contact with atmospheric oxygen and when decomposing under the situation that is forming carbonic acid and ketone under the influence of higher working temperature, go wrong in biogenic especially fuel composition.Formed carbonic acid after the alkaline components as aging deposit of engine oil exhausts, cause the system 10 that guides engine oil metal parts corrosion phenomenon or help forming settling.In addition, by fuel enter the lubricity that also changed working fluid with and the level of volume.
Therefore, propose by the present invention, will be used for removing working fluid in other words the device 24 of undesirable composition of engine oil be integrated into the system 10 of guiding engine oil.This device 24 comprises the engine oil outlet 25b that is used to that the inlet 25a of engine oil to be clean is arranged and is used to purify.This device 24 portion within it also comprises the container that does not illustrate, and can transform the reagent of undesirable composition of engine oil in this container with chemical mode.At this, be stored in so-called cracking reaction and/or chemical oxidation that reagent in this device 24 especially causes undesirable composition.
At this, cracking reaction is interpreted as the decomposition of the C-C of organic molecule, yet wherein can not obtain the oxidation of organic molecule.For this purpose, described reagent for example is configured to cracking catalyst, wherein especially uses zeolite.At this, specially suitable is the zeolite of H erionite, H-ZSM-5 and Y-zeolite type.So regulate the pore size of described zeolite, make the especially biological foul of engine oil can enter the inside of zeolitic material and transform there, described foul have usually basic hydrocarbon chain＜20, the chain length of unit especially＜18.Relative therewith, described engine main body of oil is not applied, and this main component is organic natural goods equally and has usually〉22, the especially〉chain length of 26 units.
Another embodiment is, reagent as the undesirable composition that is used to remove working fluid uses oxygenant, this oxygenant as far as possible optionally transforms the biogenic organic foul of engine oil in oxidation ground, yet does not cause the decomposition of the desirable main component of engine oil as far as possible.At this, especially suitable is potassium permanganate, and potassium permanganate is particularly suitable for the division of the two keys of C-C, and is carried on the inside that is arranged on described device 24 on the fixed carrier.In particularly advantageous embodiment, the micropore that places crystalline network that potassium permanganate such as its for example exist in zeolite, silica gel or clay.In this embodiment, realizing extra high selectivity aspect the oxidation cleavage of only undesirable composition of working fluid.
Pore size with corresponding adjustment can prevent further that the main component of the relative long-chain of engine oil from contacting with oxidant potassium permanganate; The biogenic especially less molecule of oxidation, described molecule enter in the micropore and decompose there.Carbonic acid and ketone in case of necessity and aldehyde in the oxidation cleavage that causes by potassium permanganate, have been formed.Thereby ketone and aldehyde have enough low boiling point usually automatically overflows from engine oil when working temperature is higher, and the carbonic acid of long-chain remains in the working fluid of the system 10 that guides engine oil.
For example from S.L.Regen, C.Kotel, J.Am.Chem.Soc.1977,99, know the manufacturing that is carried on the potassium permanganate on the zeolite in this piece of 3837-3838 article.
When transforming in order can very to be absorbed in effectively at the described device 24 inner acidic components that produce for example carbonic acid or other acidic component of in engine oil, having existed, for example along the flow direction of engine oil at the location, back of described device 24 absorptive unit 26.This absorptive unit for example and working fluid or engine oil be arranged in contiguously between described device 24 and the oil strainer 20.This absorptive unit 26 especially comprises the absorbing medium of alkalescence, can absorb the acidic component of working fluid by means of this absorbing medium.
What be suitable as absorption agent is, for example the absorption agent of weakly alkaline, neutral absorption agent, strong basicity, polycation and polyanion and the metal oxide of surface alkalintyization.
In weakly alkaline, neutral absorption agent situation, this absorption agent and acid foul schematically react according to general equation I:
[(R 1R 2R 3)N]+HR 5<->[(R 1R 2R 3)NH ++R 5 -] (I)
R in equation I 1To R 3The molecule resistates of the especially organic long-chain of expression is the polymeric carrier structure of weakly alkaline, neutral absorption agent in other words.In addition, R 5The molecule resistates of expression acidic component.For example relate to for example OOCR of organic molecule resistates at this 7 -Acidic component is carbonic acid and R in this case 7Represent organic molecule resistates, as it comprising in the biological example fuel.At this, described organic molecule resistates R 7Not only can be long-chain and also can be short chain.
Strong basicity, the polycation absorption agent and the acid foul of polyanion in other words schematically react according to general equation II:
[(R 1R 2R 3R 4)N ++OR 6 -]+HR 5->[(R 1R 2R 3R 4)N ++R 5 -+HOR 6] (II)
R in equation II 1To R 4Especially the molecule resistates of representing organic long-chain is the polymeric carrier structure of absorption agent in other words.In addition, R 5The molecule resistates of expression acidic component.R 6Represent organic or inorganic, polymeric and be insoluble to the alkaline resistates of working fluid thus.Preferred OR 6 -It for example is the huge polyvalent alcohol of space upper volume.
The metal oxide of surface alkalintyization for example aluminum oxide and acid foul schematically reacts according to general equation formula III:
[OAlO -+Na +]+HR 5->[OAl(OH)+Na ++R 5 -] （III）
In equation (III), such as already mentioned, R 5The organic residue of expression acidic component.
In addition, the solid support material that described absorbing medium also can be used as inorganic burning in other words exists, and this solid support material carries out surface modified with the preferred matrix that spatially hinders.At this, the described matrix that spatially hinders for example can be inorganic, however especially organic natural goods.
For the amount of removing the required absorbing medium of acidic component and/or water can be estimated by simple calculating.At this, this amount depends on that described absorption agent should change in the timed interval after which.
Be used for described absorptive unit 26 the localized replacement scheme of internal system of guiding engine oil for example be it oil pan 12 integrated, its with the intake line 14 that the is used for engine oil placement between oil pan 12 and oil pump 18 contiguously, as the part of oil strainer 20 or at its upstream or the downstream contact with intake line 14.Another targeting scheme of described absorptive unit 26 is directly to contact with intake line 14 in oil pump 15 back.
At this, for example can be used as charging by the absorbing medium of first embodiment and insert the inside of absorptive unit 26.There, the absorbing material that exists as charging by working fluid in other words engine oil flow through.
According to second embodiment, described absorbing medium for example is located at supporting structure that geometric aspects can relatively freely design in other words on the carrier structure with the form of layer, and this structure example is as being configured to metal braid, non-woven fabrics or honeycomb.With the supporting structure of absorbing material coating in other words carrier structure be in operation and wash away around or wash by working fluid.If described absorbing medium especially is configured to the form of feeding, so described absorptive unit 26 preferably comprise extraly forbid since mechanical wear by around working fluid discharge the mechanism of absorbing medium.This mechanism for example can be configured to the wiregrating hurdle or pass through for example form of non-woven fabrics of oily textile material.
Because when the aged cracking catalyst that is configured in working time, carry out, stand to be used for to remove and in oxidising process, consume the described reagent that is used for removing the undesirable composition of engine oil when the reagent of the undesirable composition of engine oil is being configured to oxygenant in other words, so the system 10 of guiding engine oil has transmitter 30 extraly according to another favourable embodiment, can check the concentration of the inner undesirable composition of engine oil by means of this transmitter.
At Fig. 2 two embodiments of transmitter 30 have been shown in other words in 3.At this, identical Reference numeral represent with Fig. 1 in the same assembly.
Preferred described transmitter 30 is configured to the double cell transmitter, and wherein the first battery 32a is as measuring the battery and the second battery 32b as reference battery.Measure battery 32a, 32b parallel connection for two, wherein the formation of the difference of the single measurement signal by measuring battery 32a, 32b obtains real sensor signal.
At this, transmitter for example is configured to the optical transmitter shown in figure 2.For this reason, in measuring battery 32a and the preferred coating of making by a kind of material of also in reference battery 32b, settling, this material be used to eliminate engine oil undesirable composition device 24 integral part and there as the reagent of the undesirable composition of disintegration fluidic.Thus, in the transmitter, described coating 34a, 34b are for example made by the zeolitic material that soaks into potassium permanganate shown in figure 2.In addition, described measurement battery 32a is among the contacting of water conservancy diversion with the system 10 of guiding electric motor oil, makes the working fluid of guiding in the system 10 of guiding engine oil at least in part by measuring battery 32a.Described reference battery 32b for example is included in the sample of working fluid of inside guiding of system 10 of guiding engine oil as the reference sample except coating 32b.Described measurement battery 32a reference battery 32b in other words is configured on the optics transparent and carry out transmission by two light sources of same light source or same intensity at least on a side.Measure battery in other words the light of the internal reflection of reference battery 32a, 32b reflex to first in other words on the second detector 36a, the 36b and detect there.
Because under consumption is stored in the situation of the potassium permanganate among the coating 34a, transform particularly undesirable biotic component of engine oil, so can observe with the naked eye the color of this coating changes to the manganese (II) that may form in case of necessity through the color (brown) of formed Manganse Dioxide from the color (purple) of potassium permanganate color (rose pink).This colour-change can detect and the attach troops to a unit concentration of in engine oil undesirable composition.
Undesirable composition in order to ensure engine oil is being measured the inner enough dissipations of battery 32a, and this measurement battery preferably only temporarily carries out coating with new engine oil.So, under the state of static state, be preserved for the time enough of the colour-change that the consumption by potassium permanganate causes.If the concentration of undesirable composition rises to more than definite value in the engine oil, so described transmitter 30 for example can be connected with control unit, this control unit itself produces signal error, and this signal error requires to recover or change the reagent that is stored in the described device 26.
Fig. 3 shows second embodiment of described transmitter 30.This sensor arrangement becomes the form of electrochemical transmitter and comprises measurement and reference battery 32a, 32b equally.Transmitter 30 according to second embodiment comprises the first potential electrode 38a extraly, and this first potential electrode is placed on the inside of measuring battery 32a and described coating 34a and is among material contacts.In addition, described transmitter 30 comprises reference electrode 38b, among this reference electrode and the inside of reference battery 32b are in and contact.In this embodiment, described reference battery 32b does not comprise the reference coupon of engine oil, but comprises the reconstructing system of attaching troops to a unit in reference electrode.In this case, described reference battery provides the constant reference potential and can enough voltmeters have determined electromotive force on described coating 34a.
If the potassium permanganate that now for example is stored among the described coating 34a reacts with the undesirable composition that imports the engine oil of measuring battery 32a, the electromotive force of so described coating 34a has just changed.Can detect described potential change by means of voltage measurement meter 40.In this case, can produce the corresponding error signal in other words during the Cmin of undesirable composition of electric motor oil surpassing working fluid.
Thus, described transmitter 30 is as oily desaturation transmitter.Yet the use of this transmitter is not restricted to the system of Oil Guide.Also can propose describedly to be used to other working fluid for example hydraulic efficiency oil or fuel are eliminated the device of undesirable composition of working fluid.

Claims (12)

1. be used to remove the device of composition of the working fluid of automobile, have the entrance and exit that is used for working fluid and be positioned at being used between the entrance and exit and be suitable for transforming the container of the reagent of composition along the flow direction of working fluid, it is characterized in that this reagent has caused the dissociative reaction or the oxidation of composition.
2. by the described device of claim 1, it is characterized in that described reagent comprises zeolitic material, silica gel or clay.
3. by the described device of claim 1, it is characterized in that described reagent comprises potassium permanganate.
4. by each described device in the claim 1 to 2, it is characterized in that described reagent is H erionite, H-ZSM-5 and Y-zeolite.
5. by the described device of claim 3, it is characterized in that described reagent comprises silica gel or clay.
6. be used to provide the system of the working fluid of automobile, especially circulation guides the system of working fluid, it is characterized in that, along the flow direction of working fluid be used for location between tank of working fluid (12) and working fluid the use location (16) at automobile by the aforesaid right requirement in each described device (24) that is used to remove the composition of working fluid.
7. by the described system of claim 6, it is characterized in that, be provided for absorbing the alkalescence of working fluid or the mechanism of acidic component (26) in device (24) back of the composition that is used to remove working fluid along the flow direction of working fluid.
8. by claim 6 or 7 described systems, it is characterized in that, be provided for determining the transmitter (30) of constituent concentration.
9. by the described system of claim 8, it is characterized in that described transmitter (30) is tried to achieve the concentration of composition with electrochemistry or optical mode.
10. by claim 8 or 9 described systems, it is characterized in that described transmitter (30) comprises measures battery (32a), comprises the reagent that the described device (24) that is used to remove composition also has in this measurement battery.
11., it is characterized in that described working fluid is fuel, engine oil or hydraulic efficiency oil by each described system in the claim 6 to 10.
12. be used for by means of by each the described device of claim 1 to 5 and the method for composition of removing the working fluid of automobile by each described system in the claim 6 to 11, it is characterized in that, concentration by means of composition in the interim at least ground testing of transmitter (30) fluid, and send signal in surpassing working fluid during the Cmin of composition, this semaphore request is changed or is recovered described device (24).
CN2009801473118A 2008-11-27 2009-10-30 Device for removing components of operating fluid for motor vehicles Pending CN102227495A (en)

Applications Claiming Priority (3)

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DE102008044112.0 2008-11-27
DE102008044112A DE102008044112A1 (en) 2008-11-27 2008-11-27 Device for removing constituents of an operating fluid for motor vehicles
PCT/EP2009/064346 WO2010060727A1 (en) 2008-11-27 2009-10-30 Device for removing components of an operating fluid for motor vehicles

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DE102013100675A1 (en) * 2013-01-23 2014-07-24 Hochschule Für Angewandte Wissenschaften Coburg Method for removing a fuel component from engine oil of an internal combustion engine
FR3090034B1 (en) * 2018-12-14 2020-12-25 Sogefi Filtration Spa Lubricating oil circuit, provided with a lubricant - zeolite contact interface, and the use of zeolite to reduce the oxidation of a lubricating oil
DE102020003976A1 (en) 2020-07-02 2022-01-05 Daimler Ag Device for reducing acidification in operating fluid cycles

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US20050194309A1 (en) * 2004-02-26 2005-09-08 Mann & Hummel Gmbh Liquid filter, especially an oil filter for an internal combustion engine
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GB2420509A (en) * 2004-11-26 2006-05-31 Nissan Technical Ct Europ Ltd Apparatus for reconditioning oil

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Application publication date: 20111026