GB2584149A - Steel particles magnet detector - Google Patents

Steel particles magnet detector Download PDF

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Publication number
GB2584149A
GB2584149A GB1907364.2A GB201907364A GB2584149A GB 2584149 A GB2584149 A GB 2584149A GB 201907364 A GB201907364 A GB 201907364A GB 2584149 A GB2584149 A GB 2584149A
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GB
United Kingdom
Prior art keywords
fuel
detection unit
connecting member
particle detection
metallic particle
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Withdrawn
Application number
GB1907364.2A
Other versions
GB201907364D0 (en
Inventor
Hoarau Yann
Grignon Gilles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi Technologies IP Ltd
Original Assignee
Delphi Technologies IP Ltd
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 Delphi Technologies IP Ltd filed Critical Delphi Technologies IP Ltd
Priority to GB1907364.2A priority Critical patent/GB2584149A/en
Publication of GB201907364D0 publication Critical patent/GB201907364D0/en
Publication of GB2584149A publication Critical patent/GB2584149A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/52—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements using magnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/04—Investigating sedimentation of particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G01N15/0656—Investigating concentration of particle suspensions using electric, e.g. electrostatic methods or magnetic methods
    • 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
    • G01N33/22—Fuels; Explosives
    • 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
    • G01N33/2835—Specific substances contained in the oils or fuels
    • G01N33/2852—Alcohol in fuels
    • 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
    • G01N33/2835—Specific substances contained in the oils or fuels
    • G01N33/2858—Metal particles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G01N15/075—Investigating concentration of particle suspensions by optical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N2015/0042—Investigating dispersion of solids
    • G01N2015/0053—Investigating dispersion of solids in liquids, e.g. trouble

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Immunology (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Dispersion Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

A metallic particle detection unit 1 installed in a fuel return circuit (fig 1, 100) between the pump (fig 1, 300) and tank (fig 1, 400) of an engine. The detection unit comprises a body 3 with an entrance 5 and exit 6, where fuel flows through, a magnetic detection device 2 which is a magnet 10 in the body, and a transparent window 9, so the fuel flow and magnet is visible. Metallic particles in the fuel may attach to the magnet and be visually inspected through the window by an operator. The magnetic detection device may be detached from the body. The unit may also comprise connecting members 7/8 for the fuel entrance and exits. The body may be cylindrical. The unit may be part of a kit with additional inlet (fig 4, 34/35) and outlet (fig 4, 36/37) elements and protection caps (fig 4, 41/42/43/44). The inlet and/or outlet elements may be of in-line or angled forms.

Description

STEEL PARTICLES MAGNET DETECTOR
TECHNICAL FIELD
The present invention relates to a metallic particle detection unit installed in a low pressure fuel circuit from a high pressure pump to a fuel tank of an internal combustion engine.
BACKGROUND OF THE INVENTION
The fuel injection system of an internal combustion engine generally can be divided into low pressure and high pressure sides. The low pressure components may consist of a number of components such as a fuel tank, a fuel filter and a fuel supply pump or lift pump. The high pressure side components usually include a high pressure (HP) pump, accumulator and fuel injector and so on.
For the fuel injection system, a high pressure pump is configured to generate the operating pressure and supply fuel to a common rail of the injection system. To be specific, the fuel compressed in the HP pump up to thousands of bars is expelled to the fuel injector. In other words, the injection system distributes the high pressure fuel into the vehicle, while the rest of the fuel not being injected into the car is heading for the fuel pump back and then return to the fuel tank along the low pressure fuel circuit.
In order to fulfill the fuel compression and deliver it to the injection system, the HP Pump consists of a number of parts, such as crank-shaft, high pressure plunger or piston, pump head with fuel inlet or outlet valves, pressure regulator valves, and so on. Each movement of each element of the HP pump has therefore to be very precise for the system to work perfectly.
Unless a component in the HP pump works properly, it could cause some metallic or steel particles and thus those particles can flow to the fuel circuit.
As well as a consequence of an aging or malfunctioning of the system, some particles may come from the HP Pump itself even with a brand new car.
If the fuel circuit is contaminated by some metallic particles, it can be risky to the whole engine system as well as reducing the life time of the components. These particles being caused by the HP pump operation might eventually disrupt the movements of the pump components and the injection system, again, hence causing malfunctioning of the system.
In general, a fuel filter is provided so that the HP pump and the injection system can be protected from being contaminated by metallic particles.
One approach to diagnose if there are some metallic particles coming from the HP pump is manually checking the particles in fuel circuit by filling up a recipient with gasoil from the filter and by checking with a magnet. This type of manual checking is time consuming and more serious problem is that the particles in small sizes or debris are not stopped by the filter and thus still penetrate into the injection system.
Therefore, for the purpose in protecting the injection system or establishing a quick and easy maintenance regime, a metallic particle detection tool or method for checking if there are any particles coming from the operation of the HP pump is required.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to resolve the above mentioned problems in providing a metallic particle detection unit installed in fuel return circuit from a fuel pump to a fuel tank of an internal combustion engine, said metallic particle detection unit comprising a body comprising a fuel entrance, a fuel exit and a transparent window such that fuel can flow in the body from the fuel entrance to the fuel exit and be visible through the transparent window; a magnetic detection device comprising a magnet disposed inside the body.
The metallic particle detection unit may further comprise a connecting member arranged to cooperate with the fuel entrance, called an entrance connecting member; a connecting member arranged to cooperate with the fuel exit, called an exit connecting member.
The magnetic detection device may comprise a magnet holder to hold the magnet, said magnet holder being arranged to be removably fixed to the body. The magnet may comprise Neodymium magnet The transparent window may comprise plexigl ass.
The body may have a cylindrical shape.
The length from the end of the entrance connecting member to the end of the exit entrance connecting member may be between 100 mm and 125 mm and the height between the top side of the magnet holder and a lower external surface 5 of the body between 30 mm and 40 mm.
Another object of the present invention to resolve the above mentioned problems is in providing a kit for detecting particles in fuel return circuit between a fuel pump and a fuel tank of an internal combustion engine, said kit comprising a metallic particle detection unit of the present invention; and at least one of an inlet element arranged to cooperate with the fuel entrance connecting member of the metallic particle detection unit, an outlet element arranged to cooperate with the fuel exit connecting member of the metallic particle detection unit, a protection cap arranged to at least partly cover the fuel entrance connecting member, a protection cap arranged to at least partly cover the fuel exit connecting member.
The inlet or outlet element may be one of in-line form or angled form.
In order to resolve the above mentioned problems, the present invention is also providing a method for detecting particles in fuel return circuit between a fuel pump and a fuel tank of an internal combustion engine, said method comprising the steps of disposing a metallic particle detection unit according to the present invention between end lines of the fuel return circuit; providing fuel in fuel return circuit by starting the fuel pump; and checking if particles are trapped in the metallic particle detection unit.
The method may further comprise the steps of: choosing an inlet element of the kit according to above inventions arranged to cooperate with the fuel entrance connecting member of the metallic particle detection unit; choosing an outlet element of the kit according to above inventions arranged to cooperate with the fuel exit connecting member of the metallic particle detection unit; coupling the chosen inlet element to the fuel entrance connecting member; and coupling the chosen outlet element to the fuel exit connecting member.
The method may further comprise the step of detaching the magnetic detection device from the body after providing fuel.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is now described by way of example with reference to the accompanying drawings in which: Figure 1 is an overall view of the fuel injection system where a metallic particle detection unit according to the present invention is installed and used in the low pressure side for a dynamic test.
Figure 2 is a front view of a metallic particle detection unit according to the present invention.
Figure 3 is a front view of a metallic particle detection unit covered with a protection cap, in particular dimension according to the present invention.
Figure 4 is an overall view of the kit according to the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
As seen from figure 1, a metallic particle detection unit 1 is installed in the low pressure side of the fuel injection system for detection of particles, specifically in fuel return circuit 100 between a fuel pump 300 and a fuel tank 400 of an internal combustion engine.
During a dynamic test or running of the engine, the fuel in the tank 400 is lifted and flows to the fuel pump 300. The fuel is compressed in the HP pump 300 in order to generate the operating high pressure and then supplied to the common rail 200.
The compressed fuel is distributed into each injector 500 via the common rail 200. Most of the fuel is injected to the vehicle, but a certain amount of the fuel supplied to the injectors goes back to the fuel pump 300. This type of returning low pressure fuel finally is heading to the fuel tank 400 along the fuel return circuit 100.
The low pressure fuel flow of the return circuit can contain some magnetic particles such as metal or steel particles from the fuel pump 300. To detect these particles on the way to the fuel tank, the metallic particle detection unit 1 is installed or mounted between the end lines of the fuel return circuit 100, especially during the dynamic test so that the particles trapped inside the body 3 or attached in the metallic particle detection unit 1 can be seen through the window of the metallic particle detection unit 1.
As can be seen from the figure 2, the metallic particle detection unit 1 comprises a body 3 comprising a fuel entrance 5, a fuel exit 6 and a transparent window 9 such that fuel can flow in the body 3 from the fuel entrance 5 to the fuel exit 6 and be seen through the transparent window 9.
The unit 1 also comprises a magnetic detection device 2 provided with a magnet 10 disposed inside the body 3.
As clearly seen from figures 2 and 3, the magnetic detection device 2 is coupled with the body 3 in order to detect magnetic particles flowing in the fuel circuit.
Advantageously, the magnetic detection device 2 can be detachable from the body 3 so that it can be easier to diagnose the operating of the fuel pump by more closely or directly observing the particles attached on the magnet 10, or so that the magnetic detection device 2 and the magnet 10 can be readily cleaned or maintained after each test.
The body 3 comprises an opening 11 through which the magnetic detection device 2 and the body 3 are coupled.
On the figures, the body 3 has a cylindrical shape. The invention is obviously not limited to this shape and the body could be of any type of tube so that the body 3 can be installed between the each end line in the middle of the fuel return circuit from the HP pump to the fuel tank without disturbing the arrangement of the other components.
The transparent window 9 may comprise any type of see-through transparent materials such as Plexiglass. Thanks to the transparent window 9, magnetic particles attached on the magnet 10 can be easily detected.
For instance, the magnet 10 can be disposed inside the body 3 by screwing the magnetic detection device 2 through the opening 11 of the body 3.
As can also be seen from figure 2, the metallic particle detection unit 1 comprises an entrance connecting member 7 arranged to cooperate with the fuel entrance 5.
Furthermore, the metallic particle detection unit 1 comprises an exit connecting member 8 arranged to cooperate with the fuel exit 6.
The metallic particle detection unit 1 can be easily connected into the fuel return circuit by plugging these connecting members 7, 8 into the each line of the fuel return circuit.
Advantageously, the material of the magnet 10 can comprise NdFeB and 5 the magnet 10 can be coated with Nickel plated. The magnet 10 may have 3mm diameter, 6mm height, 0.32g weight.
Preferably, the magnet 10 may have +/-0.1mm tolerances, 80°C operating temperature, around 400g (3.92N) adhesion strength. The magnet strength is preferably N48, but Neodymium magnets Grades can be selected among N35, N40, N42, N45, N48, N50, or N52.
As shown in figure 3, the entrance connecting member 7 and the exit connecting member 8 are covered with a protection cap 21, 22 on each end of them. The protection cap 21, 22 is at least partly covering the exposed portion of the connecting member 7,8 out of the body 3 in order to prevent the metallic particle detection unit 1 from being damaged while being transported or make sure that the inside of the metallic particle detection unit 1 is remained without any contamination while being carried out or assembled.
The length between these two ends of the connecting members 7, 8 is ranged preferably between 100 mm and 125 mm. The overall height of the metallic particle detection unit 1 is ranged preferably between 30 mm and 40 mm.
Figure 4 describes a kit 33 comprising the metallic particle detection unit 1 and other components for installing the metallic particle detection unit 1 in fuel return circuit between a fuel pump and a fuel tank.
In addition to the metallic particle detection unit 1, the kit comprises various types of inlets 34, 35 and outlets 36, 37 so that the appropriate inlet and outlet can be chosen according to the situation of the fuel return circuit, such as the diameter, orientation, position of the line of the fuel return circuit.
The inlet element 34, 35 is arranged to cooperate with the fuel entrance connecting member 7 of the metallic particle detection unit 1, and the outlet element 36, 37 is arranged to cooperate with the fuel exit connecting member 8 of the metallic particle detection unit 1.
The kit also comprises plugs 41, 42, 43, 44 to block the entrance or exit of the connecting member 7, 8 as well as the protection caps 21, 22. Other types of plugs can be used to block the inlet or outlet element.
In order to start a diagnostic method according to the present invention, the user fixes the metallic particle detection unit 1 or the kit 33 between a fuel pump flow return and a fuel tank return line.
To facilitate the mounting, other kits such as 9109-947 or 9109-951 can be used. When the metallic particle detection unit 1 is fixed between the end lines of the fuel circuit, an optimal inlet or outlet among various shape of elements such as in line form or angled form (ex: 9001-939, 9001-940) can be chosen since the orientation or direction of the end line of the fuel return circuit can vary depending on the certain dynamic test situation.
After mounting the unit 1 or kit 33, the user starts the engine and ensures that there are no leaks. The operator can keep the engine running during certain amount time period, for example 5 to 10 minutes.
During the certain amount of time period or after that period, the operator can check whether or not there are particles attached on the magnet 10 through the transparent window 9. Based on the amount or the type of the particles attached on the magnet 10, the operator can diagnose the status of the fuel pump 300 or any malfunction of the fuel injection system.
Alternatively or in series with the above checking, the operator can check the same by unscrewing the magnetic detection device 2 from the body 3.
By installing the metallic particle detection unit 1 in the low pressure side of the injection system, the diagnostic procedure can be performed more efficiently and accurately. Quick and easy detection of particle presence during a dynamic test may reduce the efforts of technician for diagnosis and maintenance of the system.

Claims (9)

  1. CLAIMS: 1. A metallic particle detection unit (1) installed in fuel return circuit (100) between a fuel pump (300) and a fuel tank (400) of an internal combustion engine, said metallic particle detection unit comprising a body (3) comprising a fuel entrance (5), a fuel exit (6) and a transparent window (9) such that fuel can flow in the body (3) from the fuel entrance (5) to the fuel exit (6) and be visible through the transparent window (9); a magnetic detection device (2) comprising a magnet (10) disposed inside the body (3).
  2. 2. A metallic particle detection unit as claimed in claim 1, said metallic particle detection unit (1) further comprising a connecting member (7) arranged to cooperate with the fuel entrance (5), called an entrance connecting member; a connecting member (8) arranged to cooperate with the fuel exit (6), called an exit connecting member.
  3. 3. A metallic particle detection unit as claimed in claim 1 or 2, wherein the body (3) has a cylindrical shape.
  4. 4. A metallic particle detection unit as claimed in any of the preceding claims, wherein the length from the end of the entrance connecting member (7) to the end of the exit entrance connecting member (8) is between 100 mm and 125 mm and the height between the top side of the magnetic detection device (2) and a lower external surface of the body (3) is between 30 mm and 40 mm.
  5. 5. A kit (33) for detecting particles in fuel return circuit (100) between a fuel pump (300) and a fuel tank (400) of an internal combustion engine, said kit 30 comprising a metallic particle detection unit (1) as claimed in any of the preceding claims 1 to 4; and at least one of an inlet element (34, 35) arranged to cooperate with the fuel entrance connecting member (7) of the metallic particle detection unit (1), an outlet element (36, 37) arranged to cooperate with the fuel exit connecting member (8) of the metallic particle detection unit (1), a protection cap (21) arranged to at least partly cover the fuel entrance connecting member (7), a protection cap (22) arranged to at least partly cover the fuel exit connecting member (8).
  6. 6. A kit for detecting particles as claimed in claim 5, wherein the inlet or outlet element is one of in-line form (34, 36) or angled form (35, 37).
  7. 7. Method for detecting particles in fuel return circuit (100) between a fuel pump (300) and a fuel tank (400) of an internal combustion engine, said method comprising the steps of disposing a metallic particle detection unit (1) as claimed in any of the preceding claims 1 to 4 between end lines of the fuel return circuit (100); providing fuel in fuel return circuit (100) by starting the fuel pump (300); and checking if particles are trapped in the metallic particle detection unit (I).
  8. 8. Method for detecting particles as claimed in claim 7, said method further comprising the steps of: choosing an inlet element (34, 35) of the kit as claimed in claim 5 or 6 arranged to cooperate with the fuel entrance connecting member (7) of the metallic particle detection unit; choosing an outlet element (36, 37) of the kit as claimed in claim 5 or 6 arranged to cooperate with the fuel exit connecting member (8) of the metallic particle detection unit; coupling the chosen inlet element (34, 35) to the fuel entrance connecting member (7); and coupling the chosen outlet element (36, 37) to the fuel exit connecting member (8).
  9. 9. Method for detecting particles as claimed in claim 7 or 8, said method further comprising the step of: detaching the magnetic detection device (2) from the body (3) after providing fuel.
GB1907364.2A 2019-05-24 2019-05-24 Steel particles magnet detector Withdrawn GB2584149A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1907364.2A GB2584149A (en) 2019-05-24 2019-05-24 Steel particles magnet detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1907364.2A GB2584149A (en) 2019-05-24 2019-05-24 Steel particles magnet detector

Publications (2)

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GB201907364D0 GB201907364D0 (en) 2019-07-10
GB2584149A true GB2584149A (en) 2020-11-25

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GB1907364.2A Withdrawn GB2584149A (en) 2019-05-24 2019-05-24 Steel particles magnet detector

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3137944A1 (en) * 2022-07-13 2024-01-19 Psa Automobiles Sa VEHICLE WITH A FUEL INJECTION SYSTEM EQUIPPED WITH A METAL PARTICLE DETECTOR

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295969A (en) * 1978-10-02 1981-10-20 Gunner Berg Magnetic fuel purifier with rotating pre-purifier
US4371437A (en) * 1980-03-15 1983-02-01 Honda Giken Kogyo Kabushiki Kaisha Fuel sedimentation device
US4759842A (en) * 1986-12-04 1988-07-26 David Frees In-line fuel filtering device
KR20010086770A (en) * 2000-03-03 2001-09-15 박호군 Apparatus and system for measuring worn ferrous particles level in oil based on inductance measurement
EP2574905A1 (en) * 2011-09-29 2013-04-03 Eurocopter Deutschland GmbH Device and method for monitoring of particles in a lubricating circuit or a hydraulic system
US20130299404A1 (en) * 2011-02-09 2013-11-14 Hino Motors, Ltd. Metal ion elimination filter
US20160177899A1 (en) * 2016-03-02 2016-06-23 Caterpillar Inc. Fuel supply system for internal combustion engine
US20180129029A1 (en) * 2016-11-07 2018-05-10 Xi'an Jiaotong University Debris direct reflection embedded microscope for on-line visual ferrograph

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295969A (en) * 1978-10-02 1981-10-20 Gunner Berg Magnetic fuel purifier with rotating pre-purifier
US4371437A (en) * 1980-03-15 1983-02-01 Honda Giken Kogyo Kabushiki Kaisha Fuel sedimentation device
US4759842A (en) * 1986-12-04 1988-07-26 David Frees In-line fuel filtering device
KR20010086770A (en) * 2000-03-03 2001-09-15 박호군 Apparatus and system for measuring worn ferrous particles level in oil based on inductance measurement
US20130299404A1 (en) * 2011-02-09 2013-11-14 Hino Motors, Ltd. Metal ion elimination filter
EP2574905A1 (en) * 2011-09-29 2013-04-03 Eurocopter Deutschland GmbH Device and method for monitoring of particles in a lubricating circuit or a hydraulic system
US20160177899A1 (en) * 2016-03-02 2016-06-23 Caterpillar Inc. Fuel supply system for internal combustion engine
US20180129029A1 (en) * 2016-11-07 2018-05-10 Xi'an Jiaotong University Debris direct reflection embedded microscope for on-line visual ferrograph

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3137944A1 (en) * 2022-07-13 2024-01-19 Psa Automobiles Sa VEHICLE WITH A FUEL INJECTION SYSTEM EQUIPPED WITH A METAL PARTICLE DETECTOR

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