CN117514551A - Valve bank and diesel fuel filter module - Google Patents

Valve bank and diesel fuel filter module Download PDF

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Publication number
CN117514551A
CN117514551A CN202210910591.0A CN202210910591A CN117514551A CN 117514551 A CN117514551 A CN 117514551A CN 202210910591 A CN202210910591 A CN 202210910591A CN 117514551 A CN117514551 A CN 117514551A
Authority
CN
China
Prior art keywords
filter
diesel fuel
conduit
valve
temperature sensing
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
CN202210910591.0A
Other languages
Chinese (zh)
Inventor
乔基奥·基隆迪
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.)
Shanghai Sofima Automobile Filter Co ltd
Original Assignee
Shanghai Sofima Automobile Filter Co 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 Shanghai Sofima Automobile Filter Co ltd filed Critical Shanghai Sofima Automobile Filter Co ltd
Priority to CN202210910591.0A priority Critical patent/CN117514551A/en
Publication of CN117514551A publication Critical patent/CN117514551A/en
Pending 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
    • F02M37/0011—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
    • F02M37/22—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
    • F02M37/36—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 with bypass 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
    • F02M37/44—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
    • F02M37/48—Filters structurally associated with fuel valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

A valve block comprising: a valve body extending between the filter body end and the tank body end, the valve body including a diesel fuel inlet opening between the filter body end and the tank body end and a filter outlet opening proximate the filter body end; an adjustment assembly comprising a temperature sensing device at the filter body end and a pair of adjustment devices mounted on the valve body, wherein a first device engages the valve body between the diesel fuel inlet opening and the filter body end and a second device engages the valve body between the diesel fuel inlet opening and the tank body end. The temperature sensing device includes a lever operatively engaging the first device and the second device to apply a loading force thereon, respectively. The valve block may be housed in the conduit and may be configured to: a low temperature configuration wherein the temperature sensing device controls a first loading force on the first device; a high temperature configuration wherein the temperature sensing device controls a second loading force on the first device, wherein the second loading force has a greater strength than the first loading force.

Description

Valve bank and diesel fuel filter module
Technical Field
The invention relates to a valve group for a diesel fuel filter module of a vehicle. Furthermore, the invention relates to a diesel fuel filtration module comprising said valve group.
Background
It is known that in diesel powered vehicles, at least one filtration module is used to filter the diesel fuel itself.
It is also known that diesel fuel filtration operations are only performed under specific conditions, in particular within a specific temperature range. For example, known diesel fuel filtration modules include an electric heater adapted to heat the diesel fuel being filtered.
Particularly at low temperatures, the filter bank operates under non-ideal conditions, and is blocked due to the formation of paraffin crystals, thereby preventing diesel fuel from entering the engine.
A common problem encountered in prior art solutions is therefore that the temperature of the diesel fuel cannot be detected correctly and in time, in particular in the filtering chamber, so that a correct and precise adjustment of the amount of diesel fuel that has to reach said filtering chamber cannot be made.
Disclosure of Invention
It is therefore highly desirable to provide a valve block that solves the above mentioned technical problems.
The object of the present invention is to provide a valve group which can effectively detect the temperature of diesel fuel in a filter chamber while adjusting the amount of diesel fuel flowing to said filter chamber in a correct and accurate manner.
This object is achieved by a valve block according to the description herein and by a diesel fuel filtration module according to the description herein.
A valve block according to the present disclosure is receivable in a conduit of a diesel fuel filtration module included in a diesel fuel power supply circuit of a vehicle, the diesel fuel filtration module including a filter bank received in a filter chamber, wherein the conduit extends along a conduit axis between a filter conduit end and a tank conduit end fluidly connected to a vehicle tank, wherein the conduit is fluidly connected to a return conduit between the filter conduit end and the tank conduit end, the return conduit being fluidly connected to a return line of the diesel fuel power supply circuit, wherein the conduit includes a filter opening fluidly connected to the filter chamber, wherein the valve block extends along a valve axis and includes: a valve body extending in length along the valve axis between a filter body end and a tank body end, wherein the valve body includes a diesel fuel inlet opening between the filter body end and the tank body end and a filter outlet opening proximate the filter body end; a regulator assembly including a temperature sensing device at the filter body end adapted to sense the temperature of the diesel fuel, the regulator assembly further including a pair of regulator devices including a first device and a second device and received on and engaged with the valve body, wherein the first device engages the valve body between the diesel fuel inlet opening and the filter body end and the second device engages the valve body between the diesel fuel inlet opening and the tank body end; wherein the temperature sensing device comprises an elongate stem extending along the valve axis and operatively engaging both the first device and the second device to exert respective loading forces on the first device and the second device; wherein the valve block is receivable in the conduit such that the valve axis coincides with the conduit axis, and the valve block is configurable to: i) A low temperature configuration corresponding to a diesel fuel temperature detected by the temperature sensing device being below a first threshold, wherein the temperature sensing device controls a first loading force on the first device; ii) a high temperature configuration corresponding to a diesel fuel temperature detected by the temperature sensing device being above a second threshold, wherein the temperature sensing device controls a second loading force on the first device; wherein the second loading force of the first device has a greater strength than the first loading force of the first device.
A diesel fuel filtration module according to the present disclosure for a diesel fuel power supply circuit of a vehicle, the diesel fuel filtration module comprising a filter stack housed in a filter chamber, wherein the diesel fuel filtration module comprises a conduit extending along a conduit axis between a filter conduit end and a tank conduit end fluidly connected to a vehicle tank, and further comprising a return conduit fluidly connected to a return line of the diesel fuel power supply circuit and fluidly connected to the conduit between the filter conduit end and the tank conduit end, wherein the conduit comprises a filter opening fluidly connected to the filter chamber, wherein the diesel fuel filtration module further comprises a valve set according to any one of the preceding claims.
Drawings
Other features and advantages of the invention will be apparent from the following description of a preferred example of embodiment of the invention, provided by way of non-limiting example with reference to the accompanying drawings, in which:
FIG. 1 illustrates a front view of a diesel fuel filtration module according to a preferred embodiment of the present invention;
FIG. 1a shows a cross-sectional view taken along section X-X in FIG. 1;
FIG. 2 illustrates a front view, partially in section, of a diesel fuel filtration module according to a preferred embodiment of the present invention;
FIG. 2a shows a cross-sectional view taken along section XI-XI in FIG. 2;
FIG. 3 illustrates a cross-sectional view of a diesel fuel filtration module including a valve block configured in a cryogenic configuration according to the present invention;
fig. 3' shows a cross-sectional view of a valve block according to the invention, which valve block is configured in the low-temperature configuration mentioned in fig. 3;
FIG. 4 illustrates a cross-sectional view of a diesel fuel filtration module including a valve block configured in a high temperature configuration in accordance with the present invention;
fig. 4' shows a cross-section of a valve block according to the invention, which valve block is configured at the height Wen Peizhi mentioned in fig. 4;
FIG. 5 shows a view of the separate components of the valve block mentioned in FIGS. 3 'and 4';
fig. 6 shows a cross-sectional view taken along section XII-XII in fig. 3'.
Detailed Description
In the drawings, the reference numeral 1 denotes a valve group for the purpose of the present invention.
Furthermore, in the figures, the reference numeral 900 indicates a diesel fuel filtering module of a vehicle, which is in turn the object of the present invention.
In particular, the diesel fuel filtration module 900 includes a filter stack 999 housed in a filter chamber 910.
Specifically, such filter group 999 performs diesel fuel filtering operations.
According to a preferred embodiment, such a filter group 999 performs the operation of separating water from diesel fuel. Preferably, the filter stack 999 includes a hydrophobic separator for separating water from diesel fuel during filtration.
Preferably, the diesel fuel filtration module 900 includes a water level sensor housed in the bottom of the filtration chamber 910 and adapted to detect the water level. Preferably, the water level sensor is operatively connected to an electric drain valve adapted to drain water accumulated in the filter chamber 910.
According to the invention, the diesel fuel filtering module 900 comprises a conduit 950 in fluid connection with said filtering chamber 910, and the valve block 1 of the invention, which is housed and acts in said conduit 950, has the purposes described above and widely hereinafter.
In particular, the conduit 950 extends along a conduit axis C-C.
In addition, the conduit 950 extends between a filter conduit end 951 fluidly connected to the filter chamber 910 and a tank conduit end 952 fluidly connected to a vehicle tank.
Preferably, the filter tube end 951 is fluidly connected to the dirty side of the filter bank 999.
Preferably, the filter conduit end 951 is substantially contained within the filter chamber 910.
Preferably, the filter conduit end 951 is located inside the filter chamber 910.
Preferably, the filter conduit end 951 is open. In other words, there is an access door at the filter conduit end 951.
According to a preferred embodiment, tank conduit end 952 is open to allow diesel fuel filtration module 900 to be fluidly connected to a vehicle tank.
Further, the diesel fuel filtration module 900 includes a return conduit 980. Preferably, the return conduit 980 is fluidly connectable or included in a return line included in the diesel fuel power supply circuit of the vehicle. Preferably, the return line is adapted to recirculate excess diesel fuel from the injectors and/or from the high pressure pump to the vehicle tank. The valve group 1 of the present invention is adapted to control the amount of diesel fuel recirculated to the filtering chamber 910, in particular to heat the diesel fuel in case it is at a low temperature, so as to avoid clogging of the filter group 999.
Preferably, a return conduit 980 connects a return line of the diesel fuel power supply circuit of the vehicle to the diesel fuel filtration module 900, preferably to conduit 950.
According to a preferred embodiment, conduit 950 is fluidly connected to the return conduit 980 between filter conduit end 951 and tank conduit end 952.
Preferably, return conduit 980 extends laterally, preferably perpendicular to conduit 950.
In addition, the conduit 950 includes a filter opening 959 in fluid connection with the filter chamber 910.
Preferably, the filter opening 959 is disposed proximate to the filter conduit end 951.
Preferably, the filter openings 959 are disposed at different axial heights along the conduit axis C-C relative to the region where the conduit 950 intersects the return conduit 980.
According to a preferred embodiment, a filter opening 959 is housed in the filter chamber 910.
According to a preferred embodiment, the filter openings 959 are provided on a radial wall of the conduit 950. Preferably, the filter opening 959 is radially spaced from the conduit axis C-C.
According to a preferred embodiment, the diesel fuel filtration module 900 includes a fill conduit 960 in fluid connection with the filtration chamber 910. Through said filling duct 960, the filling of the filtering chamber with diesel fuel can be performed in a first filling step or in any case as long as the filtering chamber 910 is emptied.
According to a preferred embodiment, the diesel fuel filtration module 900 further includes a fill pump 969 in fluid connection with the fill conduit 960.
Preferably, a fill pump 969 and fill tube 960 are fluidly disposed downstream of the filter stack 999. Preferably, the fill tubing 960 communicates on one side with the interior cavity of the filter pack 999 and on the other side with the fill pump 969, which in turn communicates directly or indirectly with the outlet port of the diesel fuel filtration module.
Preferably, a bypass valve is provided at the fill pipe 960, which is adapted to bypass the fill pump 969 when it is not active.
Preferably, with the fill conduit 960 and the filler pump 969 disposed downstream of the filter stack 999, the bypass valve communicates the clean side of the filter stack 999 with the outlet port of the diesel fuel filter module 900, thereby avoiding passage of diesel fuel through the filler pump 969 when operated.
According to a preferred embodiment, the priming pump 969 applies a pumping step (or pumping steps) within the filter chamber 910, wherein a discrete volume of diesel fuel pumped from the tank reaches the filter chamber 910, thereby evacuating the air contained in the filter chamber 910 during the delivery step. Preferably, each pumping step corresponds to a delivery step until the filtration module 900 is completely filled.
Preferably, the priming pump 969 is manually operated.
Preferably, the fill pump 969 is a manual diaphragm.
Preferably, the priming pump 969 is a manual piston type.
Preferably, for a manual priming pump 969, the pumping and delivering steps alternate according to the movement applied by the user to the diaphragm or piston of the pump.
Preferably, the priming pump 969 is of the electric type.
Preferably, in the case of an electric pump, the aspiration step and the delivery step are performed substantially simultaneously.
According to a preferred embodiment, actuation of the filler pump 969, and in particular each pumping step performed by the filler pump 969, creates a low pressure suitable for drawing a discrete volume of diesel fuel from the tank into the filter chamber 910, such that the filter chamber is gradually filled with diesel fuel. As previously described, each delivery step performed by the filler pump 969 forces air out of the filter chamber 910, thereby filling the filter chamber with diesel fuel.
Preferably, each pumping step applied by the filler pump 969 involves pumping diesel fuel in the filter chamber 910 through the primary inlet port 9100. The main inlet port is connected to the vehicle tank and communicates with the dirty side of the filter bank 999.
As described more fully below, the valve block 1 is adapted to interrupt fluid communication between the return conduit 980 and the filter chamber 910 during pump start-up.
According to a preferred embodiment, the diesel fuel filtration module 900 comprises a second filter group 999 'housed in a second filter chamber 910'. Preferably, the second filter group 999' is arranged in fluid connection downstream of the above-mentioned filter group 999.
According to a preferred embodiment, the second filter group 999' is adapted to perform particle filtration on diesel fuel under filtration.
Preferably, the second filter group 999' includes means adapted to separate water from diesel fuel during filtration.
Preferably, the filter group 999 acts as a prefilter, being arranged in fluid connection upstream of the second filter group 999'.
Preferably, the filter stack 999 includes means adapted to separate water from the diesel fuel being filtered.
According to a preferred embodiment, the diesel fuel filtration module 900 comprises a main module body and a specific cover engageable to the main module body, which are adapted to define a filtration chamber 910 into which a filter group 999 is inserted.
According to a preferred embodiment, the diesel fuel filtration module 900 comprises a main module body and a suitable second cover engageable to the main module body, adapted to define a second filtration chamber 910 'in which a second filter group 999' is inserted.
Preferably, the main module body comprises connection tubing and/or connection fittings for specific tubing, which are adapted to connect the filter group 999 to the second filter group 999' and also to connect said components to one or more external devices, e.g. one or more external pump groups.
According to the invention, the valve group 1 can be housed in said duct 950.
According to the invention, the valve block 1 extends along a valve axis V-V.
According to the invention, the valve block 1 may be accommodated in the pipe 950 such that the valve axis V-V coincides with the pipe axis C-C.
In particular, according to a preferred embodiment, the valve block 1 may be inserted as a cylinder into the conduit 950 through an opening present in the tank conduit end 952. In other words, according to a preferred embodiment, the valve block 1 can be inserted into the conduit 950 in a single operation. Preferably, all the components included in the valve block 1 and described below are insertable into the pipe by a single insertion operation.
According to the invention, the valve block 1 comprises a valve body 2.
Preferably, the valve body 2 has a structural and supporting function.
Preferably, the valve body 2 is substantially tubular, thereby defining a valve chamber 200.
The valve body 2 extends in length along a valve axis V-V between a filter body end 21 and a tank body end 22.
Preferably, the filter body end 21 may be located at the filter tube end 951. Preferably, the tank body end 22 may be located at the tank conduit end 952.
According to a preferred embodiment, the valve body 2 sealingly engages the side wall defining the conduit 950 in one area or in several areas, preferably in two areas. Preferably, the valve body 2 comprises at least one filter sealing area 27'. Preferably, the valve body 2 comprises at least one tank sealing area 27". Preferably, said sealing area is realized by a gasket element included in the valve body 2 or by one or more sealing lips formed integrally with the valve body 2.
According to a preferred embodiment, the valve body 2 is a single piece.
According to a preferred embodiment, the valve body 2 is composed of a plurality of parts 20', 20", 20'".
Preferably, the portions 20', 20", 20'" are mutually engaged, for example by snap engagement.
Preferably, said portions 20', 20", 20'" are mutually engaged by other components of the valve group 1.
According to a preferred embodiment, the components described below may be accommodated in the valve body 2 according to position and/or interaction and/or mutual space defined by the plurality of portions 20', 20", 20'".
For example, in a preferred embodiment, one part is adapted to house a first device 4 described below, while the other part is adapted to house a second device 5 described below.
According to the invention, the valve body 2 comprises a diesel fuel inlet opening 28 between the filter body end 21 and the tank body end 22. Preferably, the diesel fuel opening 28 is in fluid communication with the return conduit 980. Preferably, the diesel fuel inlet opening 28 is located at the return duct 980, i.e. in front of the return duct.
According to the invention, the valve body 2 comprises a filter outlet opening 29 adapted to be arranged in fluid communication with the filter opening 959.
Preferably, the valve body 2 comprises a filter outlet opening 29 arranged coaxially with the valve axis V-V.
Preferably, the valve body 2 includes a filter outlet opening 29 arranged in front of the filter opening 959.
Preferably, the filter opening 959 is proximate the filter body end 21.
According to the invention, the valve block 1 comprises an adjustment assembly 3.
Preferably, the regulating assembly 3 is supported by the valve body 2.
Preferably, the regulating assembly 3 is supported by the valve body 2 and is almost completely housed therein.
The conditioning assembly 3 comprises a temperature sensing device 6 adapted to detect the temperature of the diesel fuel, preferably in the filtering chamber 910.
The temperature sensing means 6 is located at the filter body end 21.
Preferably, the temperature sensing means 6 is cantilever-supported on the valve body 2 at the filter body end 21.
Preferably, the temperature sensing device 6 is positioned to be housed inside the filter chamber 910.
According to a preferred embodiment, the regulating assembly 3 comprises a pair of regulating devices 4, 5 housed on the valve body 2 and engaged with a temperature sensing device 6.
Preferably, the adjusting means 4, 5 are housed in the valve chamber 200.
The first device 4 engages the valve body 2 between the diesel fuel inlet opening 28 and the filter body end 21.
Preferably, the first device 4 engages the valve body 2 between the diesel fuel inlet opening 28 and the filter opening 959.
Preferably, the first means 4 engages the valve body 2 at the filter outlet opening 29.
Preferably, the filter outlet opening 29 and the filter opening 959 are coaxial.
The second device 5 engages the valve body 2 between the diesel fuel inlet opening 28 and the tank body end 22.
According to a preferred embodiment, the first device 4 is axially movable along an axis V-V.
According to a preferred embodiment, the second device 5 is axially movable along the axis V-V.
According to a preferred embodiment, the first means 4 and the second means 5 are movable along the axis V-V in directions opposite to each other towards respective closed positions.
According to a preferred embodiment, the first means 4 and the second means 5 engage the valve body 2 in respective seats of specific shape. Preferably, the seats are axially spaced along the axis V-V and are arranged on opposite sides of the diesel fuel inlet opening 28.
Furthermore, according to the present invention, the temperature sensing device 6 comprises an elongated rod 61 extending along the valve axis V-V and engaging both the first device 4 and the second device 5 to perform different loading forces thereon, as will be described more fully below.
According to a preferred embodiment, the temperature sensing means 6 comprises a wax member 60 with an actuator pin 600 having a position that varies according to the temperature. Preferably, the actuator pin 600 is engaged with the lever 61 such that the position of the lever 61 corresponds to the position of the actuator pin 600.
According to a preferred embodiment, the first device 4 comprises a first flap 40 and a first elastic element 45 engaged with said first flap 40. The temperature sensing means 6 applies a loading force to the first elastic element 45 in accordance with the detected temperature.
According to a preferred embodiment, the first resilient element 45 is engaged with the first flap 40 and the temperature sensing means 6.
Preferably, the first elastic element 45 is a helical spring element extending with respect to the valve axis V-V. Preferably, the helical spring element extends around the rod 61.
Preferably, the first flap 40 engages the valve body 2 between the diesel fuel inlet opening 28 and the filter opening 959.
Preferably, the first flap 40 engages the valve body 2 at the filter outlet opening 29.
Preferably, the filter outlet opening 29 and the filter opening 959 are coaxial.
According to a preferred embodiment, the temperature sensing means 6 applies a loading force to the first elastic element 45 according to the detected temperature, which loading force increases with increasing temperature.
According to a preferred embodiment, the temperature sensing means 6 applies a compressive force F4', F4 "to the first elastic element 45 depending on the detected temperature. Preferably, the strength of the compressive force increases with increasing temperature.
According to a preferred embodiment, the second means 5 comprise a second flap 50 and a second elastic element 55 engaged with said second flap 50. Preferably, the temperature sensing means 6 applies a loading force to the second elastic element 55 according to the detected temperature.
According to a preferred embodiment, the second elastic element 55 is engaged with the second flap 50 and the valve body 2.
Preferably, the second resilient element 55 is a helical spring element extending relative to the valve axis V-V.
Preferably, the second flap 50 engages the valve body 2 between the diesel fuel inlet opening 28 and the tank body end 22.
According to a preferred embodiment, the temperature sensing means 6 applies a loading force to the second elastic element 55 according to the detected temperature, which loading force increases with increasing temperature.
According to a preferred embodiment, the temperature sensing means 6 applies a compressive force F5', F5 "to the second elastic element 55 depending on the detected temperature. Preferably, the strength of the compressive force increases with increasing temperature.
Preferably, the lever 61 extends through the first flap 40 to engage the second flap 50.
According to a preferred embodiment, the lever 61 is shown with engagement steps that can be engaged by the first means 4 (e.g. by the first flap 40 or by the first elastic element 45) and can also be engaged by the second means 5 (e.g. by the second flap 50 or by the second elastic element 55).
According to the invention, the valve block 1 can be configured in a low temperature configuration and in a high Wen Peizhi.
The low temperature configuration corresponds to the diesel fuel temperature T detected by the temperature sensing device 6 Diesel oil Below the first threshold T1.
Preferably, the first threshold T1 may also be identified as a lower threshold.
Preferably, said first threshold T1 is a temperature value lower than 15 ℃, preferably corresponding to about 10 ℃.
In the low temperature configuration, the temperature sensing means 6 controls the first loading force F4' on the first means 4.
With particular reference to fig. 3, it is emphasized that the following is shown in the figure: the diesel fuel has exceeded the effect of the first loading force F4' caused by the temperature sensing device 6 and the first device 4, in particular the first flap 40 is shown in an axially raised state.
The high temperature configuration corresponds to the diesel fuel temperature T detected by the temperature sensing means 6 Diesel oil Above a second threshold T2.
Preferably, the second threshold T2 may also be identified as an upper threshold.
Preferably, said second threshold T2 is higher than 15 ℃, preferably corresponding to about 20 ℃.
In the high temperature configuration, the temperature sensing means 6 controls the second loading force F4 "on the first means 4.
According to the invention, the second loading force F4 "has a greater strength than the first loading force F4'.
According to a preferred embodiment, in the low temperature configuration, the temperature sensing means 6 control the first loading force F5' on the second means 5.
Furthermore, according to a preferred embodiment, in the high temperature configuration, the temperature sensing means 6 control the second loading force F5 "on the second means 5.
According to a preferred embodiment, the second loading force F5 "has a greater strength than the first loading force F5'.
According to a preferred embodiment, the first loading force F5 'on the second device 5 has a greater strength than the first loading force F4' on the first device 4.
Preferably, the second loading force F5 "on the second device 5 has a greater strength than the second loading force F4" on the first device 4.
In other words, in the low temperature configuration, the temperature sensing device 6 places the lever 61 in a position that engages the first device 4 and the second device 5 such that the resistance experienced by the flowing diesel fuel from the first device 4 is less relative to the resistance experienced from the second device 5. Thus, in the low temperature configuration, most or all of the diesel fuel flows to the filter chamber 910 rather than to the vehicle tank.
Preferably, in the low-temperature configuration, the first loading force F5' on the second device 5 is of such a strength that diesel fuel is prevented from flowing to the tank in the event of an overpressure in the return line. Advantageously, in the low temperature configuration, the components of the diesel fuel power supply circuit of the vehicle are protected from any possible pressure peaks.
In other words, in the high temperature configuration, the temperature sensing device 6 places the lever 61 in a position that engages the first device 4 and the second device 5 such that the resistance experienced by the flowing diesel fuel from the second device 5 is less relative to the resistance experienced from the first device 4. In the high temperature configuration, most or all of the diesel fuel flows to the vehicle tank rather than to the filter chamber 910.
Preferably, in the high temperature configuration, the strength of the second loading force F4 "on the first device 4 is such that diesel fuel is prevented from flowing to the filter opening in case of an overpressure in the return line. Advantageously, components of the diesel fuel power supply circuit in the vehicle can be protected from any possible pressure peaks even at high temperatures.
According to a preferred embodiment, the loading force is a spring loading force exerted on the first resilient element 45 and/or the second resilient element 55.
According to the invention, the first device 4 and the second device 5 are configured to interrupt the communication of the return conduit 980 with the filtering chamber 910, and in general with the filtering chamber, of the return line of the diesel fuel power supply circuit, in the case of the operative functioning of the filling pump 969.
According to the invention, the first device 4 and the second device 5 are configured to interrupt the communication of the return conduit 980 with the filtering chamber 910, and, in general, the return conduit of the diesel fuel power supply circuit with the filtering chamber, in accordance with the detected temperature, in the case of the operative functioning of the filling pump 969.
In particular, in the low temperature configuration, the first loading force F5' exerted on the second device 5 is of sufficient intensity to resist the suction force generated by the pumping step performed by the pump, thereby interrupting the fluid communication between the filtering chamber 910 and the return duct 980, in particular the portion of the return duct pair communicating with the tank.
According to a preferred embodiment, the first device 4 interrupts the fluid communication between the return duct 980 and the filtering chamber 910, while the second device 5 interrupts the fluid communication between the vehicle tank and the filtering chamber 910, thus acting as an additional safety element.
According to a preferred embodiment, the second flap 50 has at least one calibrated hole 500, preferably a plurality of calibrated holes.
According to a preferred embodiment, the second flap 50 comprises a membrane element 58 adapted to allow a flow of diesel fuel through the calibrated holes 500 in the presence of a negative pressure in the filtering chamber 910.
In particular, in the high temperature configuration, the second loading force F4 "exerted on the first device 4 is of sufficient strength to resist the suction force generated by the suction step performed by the filler pump 969, thereby interrupting the fluid communication between the filter chamber 910 and the return duct 980.
Innovatively, the valve block and diesel fuel filter module including the same fully achieve the objects of the present invention, overcoming the common problems of the prior art.
Advantageously, the valve group is adapted to be housed in a specific duct of the diesel fuel filtering module and to regulate the flow of diesel fuel into the filtering chamber during the operating steps.
Advantageously, the valve group is adapted to be housed in a specific duct of the diesel fuel filtering module and to regulate the flow of diesel fuel into the filtering chamber during the step of filling the filtering module with diesel fuel.
Advantageously, the valve group is configured to perform a variable loading force on the first device, so as to adequately manage the diesel fuel flowing to the filtering chamber according to both the temperature variation and the pressure variation of the diesel fuel itself.
Advantageously, the valve group is configured to perform a loading force on the first elastic element and the second elastic element that increases with increasing temperature. Advantageously, the preferred circulation of diesel fuel is at low temperature to the filtering chamber and at high temperature to the tank, while maintaining a safety function to assist in releasing any possible overpressure in the circuit.
Advantageously, the valve group is adapted to split the diesel fuel flow coming from the return line, allowing any overpressure that may exist in the circuit to be managed in the high-temperature configuration and in the low-temperature configuration.
Advantageously, the valve group is adapted to manage the flow of diesel fuel even in the presence of very high flow rates, in particular it is able to manage the overall flow rate of the diesel fuel flow returning from the high-pressure pump of the circuit. Advantageously, the valve group allows to simplify the circuit structure, reducing any possible solution for intercepting the reduction of the flow rate from the return line to the filtration module.
Advantageously, the valve block operates autonomously, without the need for additional control components.
Advantageously, the valve group accurately detects the temperature in the filter chamber, taking the corresponding action in an accurate manner.
Advantageously, the valve group adequately manages the flow of diesel fuel in the filtration even in the presence of negative pressure in the filtration chamber.
Advantageously, the calibrated holes allow the diesel fuel to flow to the tank when the filling pump is not activated and in a low temperature configuration, thus preventing an overpressure in the return line even in cold start conditions of the vehicle.
Advantageously, calibrating the aperture causes a pressure drop between the filtering chamber and the return line which is sufficient to isolate the portion of the return conduit arranged downstream of said aperture from the filtering chamber in case of low temperature and pump operation, thereby reducing the number of parts required and the cost of the valve assembly.
Advantageously, the calibrated holes, in combination with the first means comprised in the valve group, allow to introduce a pressure drop sufficient to prevent the extraction of diesel fuel from the return line in case of filtering chamber negative pressure and low temperature.
Advantageously, the valve block is easy to maintain and inspect.
Advantageously, the valve group comprises a pair of devices operatively engaged by the same temperature sensing adjustment element, thus adequately managing the flow of diesel fuel with the filler pump active at intermediate temperatures during both low and high temperature configurations, as well as any possible operating transients.
Advantageously, the diesel fuel filtering module allows to properly manage the steps of the filling module performed by the filling pump included therein, thus allowing the diesel fuel to flow into the filtering chamber, removing the air initially present in said chamber and avoiding the ingress of air and fuel from the return line for heating the diesel fuel in the filtering chamber.
Advantageously, the filler pump and the filling channel are arranged in fluid communication downstream of the filter group, so as to avoid clogging of the filter group by contaminants present when filtering the diesel fuel.
It is obvious that the person skilled in the art can vary the invention in order to meet the possible needs, all of which are comprised within the scope of protection defined by the appended claims.
Reference numerals:
1. valve group
2. Valve body
21. Filter body end
22. Oil tank main body end
20', 20", 20'" body portion
27' Filter sealing area
27' oil tank sealing area
28. Diesel fuel inlet opening
29. Filter outlet opening
200. Valve chamber
3. Adjusting assembly
4. First device
40. First baffle plate
45. First elastic element
5. Second device
50. Second baffle
55. Second elastic element
500. Calibrating hole
58. Diaphragm element
6. Temperature sensing element
60. Waxy component
600. Actuator pin
61. Rod
900. Diesel fuel filter module
910. Filter chamber
9100. Main inlet port
950. Pipeline
951. Filter pipe end
952. Oil tank pipeline end
959. Filter opening
960. Filling pipe
969. Filling pump
980. Reflux pipeline
999. Filter set
910' second filter chamber
999' second Filter set
C-C pipeline axis
V-V valve axis
T Diesel oil Diesel fuel temperature value
T1 first threshold
T2 second threshold
First loading force on F4' first means
F4' second loading force on first device
First loading force on F5' second means
F5 "second loading force on the second device.

Claims (18)

1. A valve set (1) receivable in a conduit (950) of a diesel fuel filtration module (900) comprised in a diesel fuel power supply circuit of a vehicle, the diesel fuel filtration module comprising a filter set (999) received in a filter chamber (910), wherein the conduit (950) extends along a conduit axis (C-C) between a filter conduit end (951) and a tank conduit end (952) fluidly connected to a vehicle tank, wherein the conduit (950) is fluidly connected to a return conduit (980) between the filter conduit end (951) and the tank conduit end (952), the return conduit being fluidly connected to a return conduit of the diesel fuel power supply circuit, wherein the conduit (950) comprises a filter opening (959) fluidly connected to the filter chamber (910), wherein the valve set (1) extends along a valve axis (V-V) and comprises:
-a valve body (2) extending in length along the valve axis (V-V) between a filter body end (21) and a tank body end (22), wherein the valve body (2) comprises a diesel fuel inlet opening (28) between the filter body end (21) and the tank body end (22) and a filter outlet opening (29) adjacent to the filter body end (21);
-a regulating assembly (3) comprising a temperature sensing device (6) at said filter body end (21) adapted to detect the temperature of said diesel fuel, said regulating assembly further comprising a pair of regulating devices (4, 5) comprising a first device (4) and a second device (5) and being housed on said valve body (2) and being engaged with said temperature sensing device (6), wherein said first device (4) engages said valve body (2) between said diesel fuel inlet opening (28) and said filter body end (21) and said second device (5) engages said valve body (2) between said diesel fuel inlet opening (28) and said tank body end (22);
wherein the temperature sensing device (6) comprises an elongate stem (61) extending along the valve axis (V-V) and operatively engaging both the first device (4) and the second device (5) to exert respective loading forces thereon;
wherein the valve block (1) is receivable in the conduit (950) such that the valve axis (V-V) coincides with the conduit axis (C-C), and the valve block is configurable to:
i) A low temperature configuration corresponding to the diesel fuel temperature (T) detected by the temperature sensing means (6) Diesel oil ) Below a first threshold value (T1), wherein the temperature sensing means (6) controls a first loading force (F4') on the first means (4);
ii) a high temperature configuration corresponding to the diesel fuel temperature (T) detected by the temperature sensing means (6) Diesel oil ) Above a second threshold value (T2), wherein the temperature sensing means (6) controls a second loading force (F4 ") on the first means (4);
wherein the second loading force (F4 ") of the first device has a greater strength than the first loading force (F4') of the first device.
2. Valve group (1) according to claim 1, wherein in the low temperature configuration the temperature sensing means (6) controls a first loading force (F5 ') on the second means (5), and in the high temperature configuration the temperature sensing means controls a second loading force (F5 ") on the second means (5), wherein the second loading force (F5") of the second means has a higher intensity than the first loading force (F5') of the second means.
3. Valve group (1) according to claim 1 or 2, wherein the temperature sensing means (6) comprises a wax member (60) having an actuator pin (600) whose position varies as a function of temperature.
4. Valve group (1) according to any of the previous claims, wherein the first means (4) comprise a first flap (40) and a first elastic element (45) joined to the first flap (40), wherein the temperature sensing means (6) exert a loading force (F4'; F4 ") on the first elastic element (45) depending on the detected temperature.
5. Valve group (1) according to claim 4, wherein the first elastic element (45) engages the first flap (40) and the temperature sensing device (6).
6. Valve group (1) according to any of the previous claims, wherein the second means (5) comprise a second flap (50) and a second elastic element (55) joined to the second flap (50), wherein the temperature sensing means (6) exert a loading force (F5'; F5 ") on the second elastic element (55) depending on the detected temperature.
7. Valve group (1) according to claim 6, wherein the second elastic element (55) engages the second flap (50) and the valve body (2).
8. Valve group (1) according to any of the previous claims, wherein the second flap (50) has at least one calibrated hole (500), preferably a plurality of calibrated holes.
9. Valve group (1) according to claim 8, wherein the second flap (50) comprises a membrane element (58) adapted to prevent diesel fuel from flowing through the calibrated holes (500) in the presence of negative pressure in the filtering chamber (910).
10. Valve group (1) according to any of the preceding claims, in combination with claim 4 or 5, wherein the lever (61) extends through the first flap (40) to engage the second flap (50).
11. Valve group (1) according to any of the previous claims, wherein the valve body (2) has a substantially tubular shape to define a valve chamber (200), wherein the first means (4) and the second means (5) are housed in the valve chamber (200).
12. Valve group (1) according to any of the previous claims, wherein the valve body (2) is single-piece or is composed of multiple parts (20 ', 20", 20'").
13. Valve group (1) according to any of the preceding claims, wherein the filter conduit end (951) of the conduit (950) is substantially accommodated in the filter chamber (910), wherein the filter opening (959) is located in the vicinity of the filter conduit end (951).
14. Valve group (1) according to any of the previous claims, wherein the valve group is insertable as a cartridge into the conduit (950) through an opening present in the tank conduit end (952).
15. A diesel fuel filtration module (900) for a diesel fuel power supply circuit of a vehicle, the diesel fuel filtration module comprising a filter stack (999) accommodated in a filter chamber (910), wherein the diesel fuel filtration module (900) comprises a conduit (950) extending along a conduit axis (C-C) between a filter conduit end (951) and a tank conduit end (952) fluidly connected to a vehicle tank, and further comprising a return conduit (980) fluidly connected to a return line of the diesel fuel power supply circuit and fluidly connected to the conduit (950) between the filter conduit end (951) and the tank conduit end (952), wherein the conduit (950) comprises a filter opening (959) fluidly connected to the filter chamber (910), preferably the filter opening is located in the vicinity of the filter conduit end (951), wherein the diesel fuel filtration module (900) further comprises a valve block (1) according to any one of the preceding claims.
16. The diesel fuel filtration module (900) according to claim 15, comprising a filling duct (960) being fluidly connected with the filter chamber (910), preferably on a clean side of the filter group (999), wherein the diesel fuel filtration module (900) further comprises a priming pump (969), preferably manually operable, being fluidly connected to the filling duct (960), wherein operation of the priming pump (969) comprises pumping diesel fuel into the filter chamber (910) through a main inlet port (9100) when the adjustment assembly (3) interrupts fluid communication between the return duct (980) and the filter chamber (910).
17. The diesel fuel filtration module (900) according to claim 16, wherein said first device (4) interrupts fluid communication between said return conduit (980) and said filter chamber (910), and said second device (5) interrupts fluid communication between said vehicle tank and said filter chamber (910) as an additional safety element.
18. The diesel fuel filtration module (900) according to any one of claims 15 to 17, further comprising a second filter group (999 ') in a second filter chamber (910'), said second filter group being arranged in fluid connection downstream of said filter group (999), wherein said filter group (999) comprises a hydrophobic separator for separating water from the diesel fuel being filtered.
CN202210910591.0A 2022-07-29 2022-07-29 Valve bank and diesel fuel filter module Pending CN117514551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210910591.0A CN117514551A (en) 2022-07-29 2022-07-29 Valve bank and diesel fuel filter module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210910591.0A CN117514551A (en) 2022-07-29 2022-07-29 Valve bank and diesel fuel filter module

Publications (1)

Publication Number Publication Date
CN117514551A true CN117514551A (en) 2024-02-06

Family

ID=89748252

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210910591.0A Pending CN117514551A (en) 2022-07-29 2022-07-29 Valve bank and diesel fuel filter module

Country Status (1)

Country Link
CN (1) CN117514551A (en)

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