WO2010149642A1 - Système de filtration pour liquides d’un circuit hydraulique - Google Patents

Système de filtration pour liquides d’un circuit hydraulique Download PDF

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Publication number
WO2010149642A1
WO2010149642A1 PCT/EP2010/058789 EP2010058789W WO2010149642A1 WO 2010149642 A1 WO2010149642 A1 WO 2010149642A1 EP 2010058789 W EP2010058789 W EP 2010058789W WO 2010149642 A1 WO2010149642 A1 WO 2010149642A1
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WO
WIPO (PCT)
Prior art keywords
liquid
filter
filter element
fluid
pump
Prior art date
Application number
PCT/EP2010/058789
Other languages
German (de)
English (en)
Inventor
André Rösgen
Original Assignee
Mann+Hummel Gmbh
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 Mann+Hummel Gmbh filed Critical Mann+Hummel Gmbh
Publication of WO2010149642A1 publication Critical patent/WO2010149642A1/fr

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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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0035—Thermo sensitive valves
    • 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
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/18—Feeding by means of driven pumps characterised by provision of main and auxiliary pumps
    • 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
    • F02M37/24—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means
    • F02M37/26—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means with water detection means
    • F02M37/28—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means with water detection means with means activated by the presence of water, e.g. alarms or means for automatic drainage
    • 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
    • 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
    • F02M37/44—Filters structurally associated with pumps
    • 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
    • F02M37/46—Filters structurally associated with pressure regulators
    • 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
    • F02M37/54—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by air purging 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/30—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by heating 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
    • F02M37/22—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
    • F02M37/48—Filters structurally associated with fuel valves

Definitions

  • the invention relates to a liquid filter system of a fluid circuit, in particular a fuel injection system with a fuel return, comprising at least one filter element, a Roh thoroughlykeitseinlass and a liquid outlet, which are each connectable to a liquid storage, and a Reinstattkeitsauslass, which is connectable to a consumer, wherein the Filter element is arranged functionally between the Rohfactkeitseinlass and the Reinstattkeitsauslass and a raw side of the filter element is connected in accordance with a control unit having a temperature detection unit for controlling a valve contained in the control unit depending on a liquid temperature of a liquid in the liquid circuit, thereby not by the consumer removed liquid is at least partially fed to the raw side of the filter element again.
  • the invention relates to a bendable liquid line and a filter element of a liquid filter system, which can be interconnected.
  • the invention relates to a check / throttle valve and a filter element of a liquid filter system, which can be interconnected.
  • liquid filter systems are used in liquid circuits in which a liquid, such as water, oil or fuel, is filtered and at least a partial recycling of the liquid takes place in the liquid storage.
  • a liquid filter system of a liquid circulation for filtration has a liquid reservoir, a liquid pump, a consumer, a filter element and a control unit.
  • the filter element can be at least partially supplied to a heated liquid.
  • the liquid is pumped with the liquid pump from the liquid storage in liquid lines, cleaned by the filter element and fed to the consumer.
  • the liquid not required by the consumer is filtered by a liquid.
  • supplied to the control unit which supplied the liquid depending on the liquid temperature to the filter element or the liquid storage.
  • the control unit and the filter element are incorporated in a common housing which has a raw liquid inlet, a clean liquid outlet, a liquid return and a liquid outlet. Often it is necessary that the consumer always fluid in an optimal state, especially under optimal pressure and / or temperature and / or optimum amount, is provided.
  • the invention has for its object to provide a liquid filter system, a flexible fluid conduit, a filter element connectable thereto, a check / throttle valve and a connectable with this filter element of a fluid circuit, which always simple and efficient, especially after a start of operation, as possible quickly enable the provision of liquid in optimal condition for the consumer.
  • This object is achieved by a liquid pump at least for priming filling of the filter element with liquid.
  • the filter element can be prefilled with liquid with the liquid pump, so that at a start of operation, especially after a filter change, the consumer quickly liquid is available.
  • the liquid pump can basically be arranged at different points in the liquid circuit on the raw side or on the clean side of the filter element. Overall, so liquid temperature, pressure and quantity on the consumer side, which can be referred to in internal combustion engines as a rail, simply always optimally controlled.
  • a liquid return can be connected to the consumer connectable and corresponding to the control unit.
  • the liquid return allows a return of unneeded liquid from the consumer side.
  • the returning liquid may be used to preheat newly supplied liquid from the liquid storage.
  • the liquid pump can be arranged functionally between the raw liquid inlet and the raw side of the filter element. This saves space and has a positive effect on the length of the required liquid lines.
  • a pressure control means for controlling the fluid pressure at least on the consumer side of the fluid circuit, wherein the pressure control means downstream of the fluid return can be arranged, if such is given.
  • the pressure control means ensures that on the consumer side always the optimal liquid pressure for the consumer prevails.
  • a portion of the liquid not removed by the consumer is fed to the filter element, whereby the cold liquid from the liquid storage with the warmer liquid from the consumer side mixed, which is generally positive for the state, in particular the consistency and flowability, of the liquid for the consumer.
  • the temperature detection unit may be configured so that it can control the valve depending on the liquid temperature of the liquid on the raw side of the filter element or optionally a time-averaged mixing temperature from a liquid return from the consumer side, if given a liquid reflux is.
  • the valve can be regulated depending on the liquid temperature in the flow or in the return of a so-called Rails.
  • the temperature detection unit may comprise a spring element made of a shape memory material, in particular Nitinol, or a bimetal or a wax element.
  • a shape memory material in particular Nitinol, or a bimetal or a wax element.
  • a shape memory material With a shape memory material, a spring element can be easily realized, which realizes a temperature-dependent increased closing pressure of the valve.
  • a spring element, in particular of steel, with a substantially temperature-independent spring force, which defines a minimum opening pressure of the valve can be provided in parallel with the spring element of shape memory material.
  • the two spring elements can be coordinated so that the temperature-independent spring element at liquid temperatures of less than, for example 20 0 C, the control tion of the valve takes over.
  • Nitinol is an easily processable and reliable shape memory material.
  • the liquid pump can be operated reversibly, in particular a gear pump or a membrane pump, an inlet / outlet of the liquid pump for liquid can be connected to a collection area for separating liquid on the raw side of the filter element, another inlet / outlet of the liquid pump which is operatively connected to the raw liquid inlet may additionally be connected to a separating liquid outlet of the liquid filtering system, and control means may be provided for selectively opening the connection of the liquid pump to the raw liquid inlet or to the separating liquid outlet, depending on the liquid conveying direction of the liquid pump.
  • control means and the liquid pump can be adjusted to one another in such a way that they alone open or close the liquid lines by reversing the liquid conveying direction, optionally pumping liquid from the liquid reservoir or removing liquid from the collecting area of the filter element via the separating liquid outlet from the liquid reservoir Filter system can be pumped out.
  • the use of the system as the fuel filter system may be water, which may be separated from the transported fuel in the filter element and collected in the collecting area. The separator water should be pumped off when a given maximum level is reached and / or at regular intervals so that the function of the filter element is not impaired.
  • the control means may comprise at least two check valves operatively disposed between the liquid pump and the raw liquid inlet and the liquid pump and the Abscheideomekeitsauslass such that either the connection to the Rohenbergkeitseinlass or the connection to the Abscheidesammlungkeitsauslass is open.
  • Check valves are simple and reliable and close automatically when reversing the liquid delivery direction. They can be loaded with springs or weights and thus be automatically opened in the direction of flow depending on the fluid pressure.
  • the two non-return valves may be arranged so that they have opposite locking directions with respect to the conveying direction of the liquid pump. Just by reversing the conveying direction so the desired line branch can be opened automatically.
  • an electronic control system for controlling at least the liquid pump and a bendable liquid line may be provided, which leads from the liquid pump to a collection area for Abscheideeckkeit on the raw side of the filter element, wherein the bendable liquid line extends removably in the filter element.
  • the liquid pump can be controlled as needed.
  • the liquid pump can also be approached and stopped gently, which significantly reduces wear.
  • the conveying direction can simply be reversed in order to use the liquid pump, optionally for repumping liquid from the liquid reservoir or for pumping off separating liquid from the filter element.
  • the liquid pump can be arranged in the spatial vicinity of the filter element, preferably on its upper side, and can be connected via the bendable liquid line to the collecting region of the separating liquid at or in the lower region of the filter element.
  • the bendable liquid line can be protected in the interior of the filter element and accommodated to save space. It can be easily placed in the filter element, even in confined spaces, because of its flexibility when changing filters.
  • the bendable liquid line in a collecting area associated portion sensors, in particular electrodes, for detecting Abscheideometechnik have and signal lines can from the sensors to the control electronics along the bendable liquid line run. In this way, the control electronics can be mounted spatially remote from the sensors above the filter element, so that in case of damage or a filter change about downwardly leaking liquid can not harm.
  • the pressure control means may have a flow direction tapered inflow region for the liquid and a subsequent spring-loaded valve.
  • the fluid pressure on the consumer side can be regulated via the inflow area and the valve together.
  • a pressure reduction upstream of the valve is achieved, so that in case of damage, such as the breakage of a spring of the valve, a reduced system pressure can be obtained on the consumer side, which allows emergency operation of the fluid circuit.
  • the flow velocity of the liquid is reduced, which has a positive effect on the service life of the valve.
  • a further filter element in particular a main filter element, can be functionally arranged between the clean side of the at least one filter element, in particular a prefilter element, and liquid outlet.
  • the use of two filter elements connected in series significantly improves the overall filter effect.
  • the first filter element can advantageously be connected to the valves according to the invention, the control unit and the liquid pump, so that there is the cold start management of the liquid filter system is concentrated.
  • the raw side of the further filter element with the clean side of the at least one filter element and optionally with the pressure control means may be functionally connected and the clean side of the further filter element may be functionally connected to the clean fluid outlet.
  • the further filter element with the consumer and possibly form a sub-circuit with the pressure control means the liquid can be supplied from the first filter element.
  • the liquid supplied from the liquid reservoir to the first filter element can be preheated via the control unit with the liquid not removed by the consumer from the subcircuit.
  • the raw side of the at least one filter element or optionally the raw side of the further filter element can be functionally connected to the liquid outlet via a venting valve, via which gases, in particular air, separated in the respective filter element can be discharged.
  • the clean side of the at least one filter element or possibly the clean side of the further filter element can be functionally connected via a check / throttle valve to the clean fluid outlet.
  • the check / throttle valve combines the function of a check valve, namely a return of liquid from the consumer into the further filter element or in the at least one filter element to prevent, with a restriction of the liquid flow.
  • the degree of throttling can preferably be adjusted automatically depending on the type of filter elements used.
  • an actuator can be arranged on the filter elements used, which automatically adjusts the throttle degree of the check / throttle valve during assembly of the respective filter element.
  • the backstop function is particularly advantageous particularly in the use of the fluid filtration system in consumers who have longer periods of downtime during which the consumer side of the fluid circuit may not idle. So this variant is particularly favorable when used with emergency generators.
  • a main liquid pump may be arranged in the liquid circuit, in particular downstream of the at least one filter element, a main liquid pump.
  • the main liquid pump can be operated independently of the first-mentioned liquid pump. In this way, separating liquid can be discharged from the collecting area of the filter element with the first-mentioned liquid pump, while the liquid in the liquid circulation is conveyed with the main liquid pump.
  • the main liquid pump may not be integrated into the liquid filtration system and the liquid filtration system may have corresponding line connections for the main liquid pump.
  • the main liquid pump can thus be arranged spatially separated from the liquid filter system preferably fixed in or on the liquid storage. In this way, a large-sized main liquid pump can be used without the space required for the actual liquid filter system is thereby increased.
  • a vent valve can be arranged functionally between the liquid return and the liquid outlet, can be discharged via the gases, in particular air, from the consumer side of the liquid circuit.
  • the vent valve can interact with the pressure control valve in such a way that an optimal liquid pressure on the consumer side is always ensured even with a gas discharge.
  • the vent valve may be arranged spatially above the pressure control means. In this way, the incoming at the pressure control valve gases can rise and discharged more efficiently through the vent valve.
  • the liquid filter system can be constructed as a module.
  • a module can be easily pre-assembled and connected to the consumer, the liquid storage and possibly the main liquid pump. Through housing-fixed connections a quick and easy installation of the liquid circuit is possible.
  • the filter element and / or optionally the further filter element may advantageously be replaceable filter whose replaceable filter element is inexpensive and can be easily replaced.
  • the object is further achieved by the bendable liquid line, the sensors, in particular electrodes, for detecting Abscheideeckkeit and signal lines from the sensors to a control electronics, which extend along the bendable liquid line.
  • the bendable liquid line has the advantage that it is easy at the same time a hydraulic connection from a collecting region of the filter element, which can also be referred to as a "bowl", with a fluid pump and an electrical connection.
  • the bendable liquid line can be guided easily and flexibly, in particular through a channel in the center of the filter element. With the aid of the sensors, operating states in the collecting area, in particular a liquid level and / or a liquid temperature, can be detected in order to optimize the state of the liquid.
  • the filter element comprises a receiving element, in particular a central tube, for a particular inventive flexible fluid line, so that the filter element can be easily equipped with a bendable fluid line.
  • the object is achieved in that the check / throttle valve can be mechanically connected to a filter element, wherein an actuating element of the filter element with a special geometry with an attack area of a throttle element of the check / throttle valve with a corresponding counter-geometry cooperate in such a way can that the check / throttle valve can be flowed through in its predetermined by a non-return element of the check / throttle valve passage direction with fluid.
  • the check / throttle valve can be opened in the forward direction only by the assembly of a filter element having an actuating element with the special geometry, and thus put into operation. This prevents damage to the fluid filtration system when using a wrong or improperly mounted filter element. This allows the liquid to be provided in optimum condition.
  • the further filter element comprises an actuating element with a special geometry, which can cooperate with an attack region of a throttle element of a particular invention check / throttle valve with a corresponding counter-geometry such that the throttle element an opening state accepts.
  • Figure 2 schematically an isometric view of the liquid filter system from
  • FIG. 3 shows a control unit of the liquid filter system from FIGS. 1 and 2 in FIG
  • FIG. 4 shows a pressure regulating valve of the liquid filter system from FIGS. 1 and 2 in FIG.
  • FIG. 5 shows a first embodiment of a prefilter with a flexible liquid line of the liquid filter system of Figures 1 and 2 in section.
  • FIG. 6 schematically shows a detail view of a liquid pump of the liquid filter system from FIGS. 1 and 2 in section;
  • Figure 7 schematically shows a longitudinal section of a Abscheide Eatkeitsaustragventils of
  • FIG. 8 schematically shows a section of a valve assembly with a pre-pump check valve and an inlet check valve of the liquid filter system from FIGS. 1 and 2;
  • FIG. 9 shows schematically a first embodiment of a check / throttle valve of the liquid filter system of Figures 1 and 2 with a main filter according to a first embodiment in section.
  • FIG. 10 schematically shows a second exemplary embodiment of a main filter of the liquid filter system from FIGS. 1 and 2 in the form of a replaceable filter;
  • FIG. 11 is a schematic sectional view of a second exemplary embodiment of a prefilter of the liquid filter system from FIGS. 1 and 2 designed as a replaceable filter;
  • Figure 12 schematically a second embodiment of a check / throttle valve of the liquid filter system of FIGS. 1 and 2 in section.
  • a liquid circuit 10 is shown schematically.
  • the fluid circuit 10 comprises a fluid reservoir 12, a raw fluid line 14 emanating from the fluid reservoir 12, a fluid filter system 16 connected to the raw fluid line 14, a clean fluid line 18 which connects a consumer 20 to the fluid filter system 16, a fluid return line 22 and a fluid drain 24.
  • the consumer for example, 20 may include a fuel injection system of an internal combustion engine to which liquid fuel (liquid) is supplied from a fuel storage.
  • a main liquid pump 26 is provided which generates a liquid pressure in the liquid circuit 10 and has a larger delivery volume than the consumer 20 can take a maximum.
  • the main liquid pump 26 is disposed outside of the liquid filtration system 16 in this embodiment.
  • the arrangement of the main liquid pump 26 is arbitrary within the liquid circuit 10, whereby an arrangement, for example, in the liquid filter system 16, in the liquid storage 12 or other liquid-carrying line is possible.
  • the components of the liquid filter system 16, which are arranged in Figure 1 within the designated rectangular box 27, are, as shown in Figure 2, constructed as a module.
  • the liquid filter system 16 can be so pre-assembled simply connected to the liquid storage 12 and the consumer 20.
  • the module of the liquid filter system 16 has a raw liquid inlet 28 and a liquid outlet 34, via which the raw liquid line 14 and the liquid keitsabtechnisch 24 the liquid filter system 16 is separably connected to the liquid storage 12.
  • the module of the liquid filter system 16 has a liquid outlet 30 and a liquid return 32, via which by means of the clean liquid line 18 and the liquid return line 22, the liquid filter system 16 is separably connected to the consumer 20.
  • the liquid filter system 16 has a pre-filter 36 and a main filter 38, each having a raw side 36a and 38a and a clean side 36b and 38b.
  • the respective raw sides 36a, 38a and clean sides 36b, 38b are sealingly separated from each other.
  • the raw liquid inlet 28 is connected via a feed line 40 to the raw side 36 a of the prefilter 36.
  • a weight-loaded inlet-check valve 42 is arranged, which is to prevent a return of liquid from the raw side 36a back to the raw liquid inlet 28.
  • the clean side 36b of the prefilter 36 is connected to a pump line outlet 46 of the liquid filter system 16 via a main pump supply line 44.
  • a suction line 48 of the main liquid pump 26 is detachably connected.
  • a pressure line 50 leads to a pumping line inlet 52 of the liquid filter system 16.
  • Pumping line inlet 52 is connected to the raw side 38a of the main filter 38 via a main pump discharge line 54.
  • a main filter-clean line 56 leads to the clean liquid outlet 30.
  • a spring-loaded check / throttle valve 58 explained in more detail below, with the u. a. a return of liquid from the clean liquid outlet 30 to the clean side 38b of the main liquid filter 38 is prevented.
  • a return line 60 is further integrated, which connects the liquid return 32 with the liquid outlet 34.
  • a return-vent valve 62 is arranged in the form of a check valve.
  • the return Run vent valve 62 prevents backflow of liquid and / or gas from the liquid outlet 34 forth toward the liquid return 32.
  • a vent portion of the return line 60 downstream of the return vent valve 62 is shown in dashed lines in Figure 1, which is to indicate that in this area essentially gas, preferably air, is discharged from the liquid circuit 10.
  • the consumer side of the fluid circuit 10 may also be referred to as "RaN", in particular in fuel systems.
  • a control unit connection line 64 branches off from the return line 60 and leads to the raw side 36a of the prefilter 36.
  • a control unit 66 is arranged, which is shown in section in FIG. With the control unit 66, a liquid backflow from the liquid return 32 to the raw side 36 a is controlled depending on the temperature of the liquid on the raw side 36 a of the prefilter 36.
  • a pressure control valve 70 is arranged to regulate the fluid pressure on the consumer side of the Liquid circulation 10.
  • the pressure control valve 70 allows a flow of liquid from the return line 60 to the main pump supply line 44. In the reverse flow direction blocks the pressure control valve 70th
  • the main pump connection line 68 to the pressure control valve 70 is functionally parallel to the control line connecting line 64, the control unit 66 and the pre-filter element 36 having liquid line branch.
  • the pressure control valve 70 is located below the return purge valve 62, so that upstream of the pressure control valve 70 occurring gases, in particular air over the return vent valve 62, the vent portion of the return line 60 and the liquid discharge 24 can be optimally discharged to the liquid reservoir 12.
  • the raw side 38a of the main filter 38 is connected via a vent line 72 to the return line 60 and opens into the vent section downstream of the return vent valve 62.
  • the above-mentioned main filter vent valve 74 is arranged, which serves as a spring-loaded check valve is constructed, and a gas discharge from the raw side 38 a of the main filter 38 to the vent portion of the return line 60 allowed.
  • a pre-pump line 76 which leads to a reversibly operable liquid pump 78.
  • a weight-loaded pre-pump check valve 80 With which a liquid backflow from the liquid pump 78 to the feed line 40 is prevented.
  • a flexible liquid conduit 82 which may also be referred to as a "flexible pipe" leads to a collection liquid collection region 84 at the bottom of the pre-filter 36.
  • the separation liquid is essentially water.
  • a separation liquid discharge line 86 branches off from the pre-pump line 76 and leads to a separation liquid outlet 88 of the liquid filter system 16.
  • a discharge line, not of interest here, is connected to the separation liquid outlet 88.
  • separation liquid discharge line 86 there is disposed a spring-loaded separation liquid discharge valve 90, which prevents backflow of separation liquid to liquid pump 78.
  • control unit 66 is shown in section.
  • the control unit 66 comprises a valve unit 66a with which the control unit connection line 64 can be opened or closed.
  • control unit 66 has a helical compression spring made of nitinol (nitinoleather 66b) which, by means of its shape memory, serves as the temperature detection unit for the liquid temperature of the filter unit located in the filter-side region of the control unit connection. line 64 is used.
  • nitinol a different shape memory material or a bimetal or a wax element can be used.
  • Valve unit 66a and Nitinolfeder 66b are housed in a common cylindrical valve housing 92.
  • Valve housing 92 has an end face 94 for liquid, which corresponds to the connected to the return line 60 portion of the control unit connecting line 64.
  • Inlet opening 94 is closable with a valve body 96 which is movable in a valve chamber 102 of the valve housing 92 to the inlet opening 94 and away from it.
  • To close the inlet opening 92 is a corresponding sealing surface of the valve body 96 to a valve seat to the inlet opening 94 sealingly.
  • valve unit 66a is shown in the open state. Valve unit 66a is closed in the normal state, not shown below a certain liquid pressure on the consumer side and above a certain liquid temperature on the filter side.
  • the opening pressure of the valve unit 66a is generally dependent on the liquid temperature. This is effected by the spring force of the nitinol 66B and a co-acting in the same direction helical compression spring made of steel (steel spring 98).
  • the steel spring 98 surrounds the nitinol spring 66b coaxially therewith. However, the steel spring 98 can also be arranged inside the nitinol spring 66b.
  • Nitinol spring 66b and steel spring 98 are supported on the underside of the valve body 96 and on the inner surface of the valve housing 92 opposite the inlet opening 94.
  • valve housing 92 On opposite circumferential sides of the valve housing 92 are also two outlet openings 100 which are connected to the valve chamber 102.
  • the outlet openings 100 correspond via the first connecting line 64 to the raw side 36 a of the prefilter 36.
  • Nitinol spring 66b is in total thermal contact with liquid in the portion of the connecting line 64 to the raw side 36a of the prefilter 36 and thus detects the liquid temperature in the flow. Nitinol spring 66b increases its axial extent with increasing liquid temperature and thus exerts in a predetermined liquid temperature range a closing pressure on valve body 96 to close the valve unit 66a, so that no Liquid from the return line 60 to the pre-filter 36 passes. Below the predetermined flow liquid temperature, preferably 20 0 C, for example, during a cold start, takes Nitinolfeder 66 b their original axial extent, so that their share of the closing force of the valve unit 66 a decreases with decrease in liquid temperature. The minimum opening pressure of the valve unit 66a is then defined by the steel spring 98 whose spring force is substantially independent of temperature. Steel spring 98 prevents the valve unit 66a from being opened below the minimum opening pressure.
  • the liquid partial stream derived below the determined flow temperature via the control unit 66 simultaneously serves to heat the liquid in the prefilter 36.
  • Pressure control valve 70 is shown in section.
  • Pressure control valve 70 has a liquid inlet 103 which is connected to return line 60.
  • the fluid inlet 103 is adjoined by a flow area, which tapers in the direction of flow and has a multiple graduation, 104.
  • Adjoining the inflow region 104 is a valve seat of a spring-loaded check valve 106.
  • the valve spring 108 presses a valve body 110 against the valve seat 105 and thus closes the check valve 106.
  • An annular space 112 adjoins the valve seat 105 downstream.
  • Annular space 112 has on the peripheral side an outlet port 114 for the liquid, which is connected to main pump connecting line 68.
  • Inflow region 104 and check valve 106 are arranged substantially linearly in a common housing 115.
  • the pressure control valve 70 With the pressure control valve 70, the liquid pressure in the liquid circuit 10 on the consumer side, in particular in the main filter-clean line 56, the clean liquid line 18, the liquid return line 22 and the portion of the return line 60 is controlled in front of the vent valve 62.
  • the inflow region 104 and the check valve 106 interact functionally, the flow velocity in the area of the valve body 110 being reduced by means of the inflow region 104.
  • return-venting valve 62 and main filter venting valve 74 With return-venting valve 62 and main filter venting valve 74, the amount of dissolved air in the liquid is kept as low as possible, so that the pressure regulating valve 70 is optimized for cavitation.
  • With the inflow Area 104 may also be an emergency operation possible, even if the check valve 106 due to a defect, such as the breakage of the valve spring 108, no longer closes.
  • Pre-filter 36 is shown according to a first embodiment in section.
  • Pre-filter 36 has a cylindrical filter housing 116, in which a here not further interesting, substantially rotationally symmetric filter element 118 is arranged.
  • the filter element 118 separates an inlet space 120 on the dirty side 36a of the prefilter 36 tightly from an inner space on the traveler side 36b. Below the filter element 118 is separated from this with an end plate 120, the collection area 84 for the Abscheidesammlung.
  • the housing part surrounding the collecting region 84 may also be referred to as a "bowl.”
  • the raw side 36a is connected to the collecting region 84, so that the liquid to be conveyed can be distributed on the raw side 36a and in the collecting region 84. Separating liquid separated on the raw side 36a can flow off sink down to the bottom of the collection area 84 and collect there in a central valley.
  • the bendable fluid line 82 extends from a terminal block 82a almost to the bottom of the collection area 84 where it is open.
  • the bendable fluid conduit 82 is made of a plastic, in particular PA11. Fluid conduit 82, because of its flexibility, can be easily plugged into center tube 122, e.g. during a change of the pre-filter 36. Pre-filter 36 can also be tilted or tilted relative to the connection head 82a. Liquid line 82 can be easily replaced.
  • Connection head 82a has hydraulic connections for liquid pump 78 and electrical connections for a control electronics unit 124 of the liquid filter system 16.
  • liquid lines 126 On the outside of the bendable liquid line 82 extend in the axial direction two signal lines 126 in the form of metal strands to the free end of the liquid line 82. There, they are connected to liquid sensors 128, which detects the reaching of a predetermined level of Abscheideierikeit in the collection area 84 can be.
  • the liquid sensors 128 may also be formed like an electrode from the signal lines 126.
  • the signal lines 126 are connected in the terminal block 82a via electrical connections to the control electronics unit 124. With the control electronics unit 124, the liquid pump 78 can be controlled in response to signals from the liquid sensors 128 so that it sucks the separating liquid out of the collecting area 84.
  • the length of the bendable fluid conduit 82 is optimally matched to the height of the pre-filter 36 so that the mouth end is located at a distance from the bottom of the collection area 84 which is optimal for aspirating the separation liquid.
  • Liquid pump 78 is shown in FIG. It is a gear pump that can be operated reversibly.
  • the gear pump has two steel gears 78a, the teeth of which slide along ceramic-coated housing walls.
  • the housing walls may be replaced with ceramic, as well as with another material, e.g. Plastic or steel, be coated. But they can also be made entirely of ceramic, plastic or steel.
  • the teeth of the two stainless steel gears 78a interlock.
  • the direction of rotation of the stainless steel gears 78a defines the conveying direction.
  • One inlet / outlet 130 of the liquid pump 78 is connected to the pre-pump line 76, and another inlet / outlet 132 is connected to the bendable liquid line 82 via the connection block 82a.
  • the conveying direction can be specified so that either separating liquid is sucked out of the collecting area 84 or liquid from the pre-pump line 76 of the raw side 36a, respectively the collecting area 84, is pumped.
  • the pre-pump return valve 80 When aspirating separating liquid from collecting area 84, the pre-pump return valve 80 is automatically closed, so that a pressure for opening the separating liquid discharge valve 90 in the separating liquid discharge line 86 builds up. With sufficient bleed liquid pressure, bleed liquid discharge valve 90 is opened against the spring load so that the bleed liquid is pumped out of collection area 84 of prefilter 36 and is thus removed from liquid filtration system 16 via bleed liquid outlet 88. If the start-up liquid pump 78 is actuated by the control electronics unit 124 for re-pumping liquid. This is the case, for example, if after a change of the pre-filter 36, in this still no liquid is contained.
  • a lack of liquid may also be detected with the liquid sensors 128 or other detection unit and transmitted to the control electronics unit 124.
  • liquid pump 78 with electronic control unit 124 is actuated in such a way that it can suck in liquid via liquid line 14 and pre-pump line 76 and supply it to pre-filter 36 via flexible liquid line 82.
  • the pre-pump check valve 80 is opened automatically.
  • Abscheidesammlungkeits-discharge valve 90 is automatically closed, so that build up the post-pumping required suction pressure in the backing pump line 76 and also no Abscheideierikeit from the Abscheideflüssikeits- outlet 88 can flow back.
  • the start-up filling operation is terminated by stopping the liquid pump 78 with the control electronics unit 124.
  • the liquid filter system 16 is now ready for normal operation.
  • liquid is sucked by means of the main liquid pump 26 via supply line 40 and the automatically opening non-return valve 42 to the raw side 36a of the prefilter 36.
  • FIG. 7 shows the separating liquid discharge valve 90 in longitudinal section.
  • Separation liquid discharge valve 90 has an inlet port 90a connected to separation liquid discharge line 86.
  • An exhaust passage 90b extends into separation liquid outlet 88 releasably secured to a valve housing 90c of the separation liquid discharge valve 90.
  • Inlet opening 90a is closed below a certain deposition liquid pressure in separation liquid discharge line 86 with a valve body 9Od which is pressed with a prestressed valve spring 9Oe against a valve seat which surrounds inlet opening 90a.
  • Abscheideitzkeit- discharge valve 90 is constructed linearly overall.
  • the inlet check valve 42 and the fore pump check valve 80 are housed in a common multi-part housing 129.
  • the pre-pump check valve 80 is a weight-loaded ball valve
  • the inlet check valve 42 has a valve body 42 which is loaded by means of a coil spring 42b.
  • the liquid line coming from the Rohallkeitseinlass 28 opens into a peripheral inlet 125 of a branching chamber 127 between inlet check valve 42 and backing pump check valve 80.
  • the corresponding liquid line branches in the backing pump check valve 80 as above-mentioned backing pump line 76 and in the inlet check valve 42 as Supply line 40 denotes.
  • the check / throttle valve 58 is shown according to a first embodiment, which is installed in a filter head 132 for the main filter 38.
  • Main filter 38 which is likewise constructed in accordance with a first exemplary embodiment in FIG. 9, is screwed on at the bottom to filter head 132.
  • Check / throttle valve 58 has a cup-shaped housing 134 which is open to the main filter 38. Housing 134 has peripherally a liquid opening 136, which is followed by the portion of the main filter-clean line 56, which leads to the clean liquid outlet 30.
  • In the housing 134 is also a cup-shaped throttle valve piston 138 slidably disposed in the axial direction. The bottom of the throttle valve piston 138 is located on the main filter 38 side facing.
  • throttle valve piston 138 On the peripheral side, throttle valve piston 138 has a fluid port 140, which in the upper position shown in FIG. 9, in which the non-return throttle valve 58 is in its minimum throttling action, is aligned with the fluid port 136.
  • the bottom of the throttle valve piston 138 has a receiving opening 142 for receiving a hollow connecting piece 144 which is fixed to the end face of the main filter 38. Connecting piece 144 is fluid-conductively connected to the clean side 386 of the main filter 38.
  • a check valve piston 146 is arranged in the interior of the throttle valve piston 138 in the axial direction relative to the latter displaceable. With check valve piston 146 receiving opening 142 can be closed. On the side facing away from the receiving opening 142 engages a biased coil spring 148 on the check valve piston 146, the opposite side is supported against a housing cover 150 of the housing 134. Coil spring 148 exerts a closing force on the check valve piston 146 and presses it against a sealing surface on a valve seat surrounding the receiving opening 142 at the bottom of the throttle valve piston 138, so that receiving opening 142 is closed below a certain liquid pressure on the clean side 38b of the main filter 38.
  • Check valve piston 146 also has a seal 147 against the edge of the connecting piece 144. The edge of the connecting piece 144 is formed as a sealing surface. Seal 147 seals in the closed position of the check valve piston 146 from the interior of the throttle valve piston 138 against the clean side 38b of the main filter 38 from.
  • Connecting piece 144 has a shoulder 152 which is offset from the edge of the connecting piece 144. Shoulder 152, with the main filter 38 properly installed, is fluid tight on the face of the throttle valve piston 138 facing the connecting sleeve 144 and urges the throttle valve piston 138 against the spring force of the coil spring 148 to the housing cover 150 so that the fluid ports 136 and 140 are aligned. The check / throttle valve 58 is then open in the forward direction.
  • Check / throttle valve 58 thus combines a backstop for liquid from the main filter line 56 to the consumer 20 with the throttle function in particular for fault detection. The backstop prevents the consumer side from running when the consumer 20 is not in operation.
  • FIG. 10 shows a second exemplary embodiment of a main filter 238, which is designed as an exchangeable filter.
  • a replaceable replaceable filter element 245 is arranged in a filter housing pot 240.
  • Filter housing pot 240 is formed on a filter head 242 as a filter head Part of a non-illustrated in Figure 10 check / throttle valve, which is otherwise similar to the check / throttle valve 58 of Figure 9, releasably secured.
  • the filter head 242 forms the cover of the filter housing pot 240.
  • An end plate 246 of the replaceable filter element 245 is fluid-tight against a corresponding sealing surface of the filter head 242.
  • a connecting piece 244 is arranged with a collar 252, which cooperates analogously to the connecting piece 144 of the first embodiment of the main filter 38 of Figure 9 with the check / throttle valve.
  • FIG. 11 shows a second exemplary embodiment of a prefilter 236, which is designed as an exchangeable filter.
  • the filter housing 316 is constructed in two parts in the second embodiment and can be opened.
  • a replaceable filter element 237 is arranged interchangeably.
  • the replaceable filter element 237 has a central tube 322, which, analogous to the central tube 122 from the first exemplary embodiment according to FIG. 5, serves as a receptacle for the bendable fluid line 82 (not shown in FIG. 11).
  • Filter housing 316 is mounted with the opening 327 for the bendable liquid conduit 82 having end face 329 on a filter head, not shown.
  • Middle tube 322 has at its free end outside of the filter housing 316 on the radially outer side of a circumferential seal 323, with which it is sealed in the radial direction against the filter head.
  • a further closed seal is arranged, is sealed with the end face 329 against a corresponding sealing surface of the filter head in the axial direction.
  • a second embodiment of a check / throttle valve 58 is shown.
  • the elements which are similar to those of the first exemplary embodiment according to FIG. 9 are provided with the same reference numerals, so that with respect to their description reference is made to the statements relating to the first exemplary embodiment.
  • the check / throttle valve 58 additionally has a predetermined externally biased compression coil spring 149 which is coaxial with the coil spring 148, this and the receiving opening 142 in the bottom of the throttle valve piston 148 surrounding runs.
  • the outer coil compression spring 149 is supported on one side against the housing cover 150 and on the other side against the bottom of the throttle valve piston 138 from.
  • the outer coil compression spring 149 holds when not mounted main filter 38, the throttle valve piston 138 in its closed position.
  • the liquid filter system 16 or parts thereof can be used instead of a fuel circuit even in a different fluid circuit, such as a water or oil circuit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L’invention concerne un système de filtration pour liquides (16) d’un circuit hydraulique (10), en particulier d’une installation d’injection de carburant présentant une recirculation du carburant. Le système de filtration pour liquides (16) présente au moins un élément filtrant (36), une admission de liquide brut (28) et une sortie de liquide (34), qui peuvent être respectivement reliés à un réservoir de liquide (12). Le système de filtration pour liquides (16) présente en outre une sortie de liquide épuré (30) qui peut être reliée à un consommateur (20), l’élément filtrant (36) étant agencé de manière fonctionnelle entre l’admission de liquide brut (28) et la sortie de liquide épuré (30). Un côté brut (36a) de l’élément filtrant (36) est relié de manière correspondante à un ensemble de commande (66) qui présente un ensemble de détection de température (66b) pour commander une soupape (66a) contenue dans l’ensemble de commande (66) en fonction de la température d’un liquide présent dans le circuit hydraulique (10), le liquide non prélevé par le consommateur (20) pouvant être ramené, au moins en partie, au côté brut (36a) de l’élément filtrant (36). Une pompe à liquide (78) permet au moins de remplir l’élément filtrant (36) de liquide au démarrage.
PCT/EP2010/058789 2009-06-24 2010-06-22 Système de filtration pour liquides d’un circuit hydraulique WO2010149642A1 (fr)

Applications Claiming Priority (2)

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DE102009030500A DE102009030500B4 (de) 2009-06-24 2009-06-24 Flüssigkeitsfiltersystem eines Flüssigkeitskreislaufs
DE102009030500.9 2009-06-24

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WO2010149642A1 true WO2010149642A1 (fr) 2010-12-29

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Cited By (3)

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WO2014198687A1 (fr) * 2013-06-12 2014-12-18 Mahle International Gmbh Système d'alimentation en carburant
WO2015181457A1 (fr) * 2014-05-27 2015-12-03 Peugeot Citroen Automobiles Sa Boitier de décantation par gravité pour circuit de circulation de liquide
IT202200008963A1 (it) * 2022-05-03 2023-11-03 Ufi Innovation Ct Srl Gruppo valvola

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WO2015056045A1 (fr) * 2013-10-14 2015-04-23 Renault Trucks Système d'alimentation en carburant destiné à un moteur à combustion interne
DE102018108807A1 (de) * 2018-04-13 2019-10-17 Volkswagen Aktiengesellschaft Einrichtung zur Bevorratung und Zufuhr von Kraftstoff zu einer Brennkraftmaschine

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EP0337861A1 (fr) * 1988-04-11 1989-10-18 Labinal Dispositifs pour éliminer l'eau du gazole alimentant un moteur Diesel
DE19847999A1 (de) * 1998-10-17 2000-04-20 Mann & Hummel Filter Filtereinrichtung
EP1058000A2 (fr) * 1999-06-03 2000-12-06 Ford Global Technologies, Inc. Unité de transfert et de conditionnement de carburant
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WO2014198687A1 (fr) * 2013-06-12 2014-12-18 Mahle International Gmbh Système d'alimentation en carburant
JP2016523327A (ja) * 2013-06-12 2016-08-08 マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツングＭＡＨＬＥ Ｉｎｔｅｒｎａｔｉｏｎａｌ ＧｍｂＨ 燃料供給システム
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IT202200008963A1 (it) * 2022-05-03 2023-11-03 Ufi Innovation Ct Srl Gruppo valvola
WO2023214276A1 (fr) * 2022-05-03 2023-11-09 Ufi Innovation Center S.R.L. Groupe de soupapes

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DE102009030500B4 (de) 2012-03-01
DE102009030500A1 (de) 2011-01-27

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