CN110397748B - Magnetic valve for ventilation of carbon tank - Google Patents
Magnetic valve for ventilation of carbon tank Download PDFInfo
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- CN110397748B CN110397748B CN201910734126.4A CN201910734126A CN110397748B CN 110397748 B CN110397748 B CN 110397748B CN 201910734126 A CN201910734126 A CN 201910734126A CN 110397748 B CN110397748 B CN 110397748B
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- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
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- 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
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- 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
- F16K27/029—Electromagnetically actuated valves
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- 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
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
- F16K31/082—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet using a electromagnet and a permanent magnet
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- 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
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M2025/0845—Electromagnetic valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a carbon tank ventilation magnetic valve. The valve comprises a valve body assembly, a valve core assembly, an electromagnet assembly and a plug port assembly, wherein a sealing ring is arranged on the outer wall of the valve body assembly, a gas channel is formed in one end of the valve body assembly, the valve core assembly is arranged inside the other end of the valve body assembly, the electromagnet assembly and the plug port assembly are fixedly connected with the other end of the valve body assembly, the electromagnet assembly is positioned inside the plug port assembly and is coaxially arranged with the valve core assembly, a coil joint of the electromagnet assembly is connected with a PIN PIN on the plug port assembly, and when the plug port assembly is electrified, the valve core assembly moves under the repulsive force of the electromagnet assembly to disconnect the gas channel; when the plug interface assembly is powered off, the electromagnet assembly adsorbs the valve core assembly to enable the gas channel to be communicated. The invention has simple structure, simple manufacturing process, complete isolation of the electric control part and the valve core executing part, higher safety and reliability and low cost.
Description
Technical Field
The invention belongs to the technical field of fuel evaporation control systems, and particularly relates to a carbon tank ventilation magnetic valve in a vehicle-mounted fuel system leakage detection device.
Background
The fuel evaporation control system is generally composed of a fuel tank assembly, a carbon tank assembly, an ash filter, a carbon tank desorption control valve and connecting pipelines thereof, wherein the carbon tank can be used for absorbing fuel vapor volatilized from the fuel tank assembly and enabling the fuel vapor to participate in engine combustion when an automobile is started. If the fuel evaporation control system has pipeline damage or loose connecting pieces and leakage occurs in the carbon tank assembly, fuel vapor can volatilize into the atmosphere from the system, thereby causing environmental pollution and resource waste.
Accordingly, many countries, including the middle and beauty, have regulations requiring the provision of an on-board diagnostic system (OBD) to identify possible leaks and signal the same, and to provide corresponding data to on-board memory for use by the factory to perform off-line diagnostics.
The corresponding strategy of most host factories is to connect CVS valves in series between the carbon tank assembly and the ash filter, and the pressure sensor is arranged in the fuel evaporation control system; when the vehicle-mounted ECU sends out a detection instruction, the CVS valve is closed firstly, so that the fuel evaporation control system forms an independent system, and whether the fuel system leaks or not is judged by utilizing the time and pressure change trend in the space;
In the prior art, china patent application with the application number 201821482926.9 discloses a carbon tank stop valve of an automobile fuel evaporation and discharge system, which mainly comprises electromagnetic coil components, iron core components, valve head components, return springs and other parts; the main action mechanism is that under the condition of electrifying, the electromagnetic coil component is excited, the generated electromagnetic force is enough to overcome the compression spring force of the return spring, the movable iron core is adsorbed downwards by the electromagnetic force, the valve head component is driven to move downwards, and the rubber sealing gasket on the valve head component is in contact with the sealing opening on the end cover, so that the function of closing the system passage is realized; after the power is off, the reset spring pushes the valve core assembly, and the rubber sealing gasket on the valve head assembly is separated from the sealing opening on the end cover, so that the function of opening the system passage is realized.
The above patent suffers from the following drawbacks:
1. the number of parts is large, the injection molding process is complex, and the cost is high.
2. When the power is on, the electromagnetic force adsorbs the spring to realize the closing of the passage, when the power is off, the passage is opened by the compression force of the spring, and the spring force can be invalid after long-time work, so that the reset pushing force of the spring is insufficient, and the opening effect of the passage of the system is affected.
3. Parts such as solenoid subassembly, iron core subassembly, valve head subassembly, reset spring all expose in the passageway, can corrode the part after high temperature fuel steam passes through these parts for a long time, and fuel steam can adhere to the part simultaneously, makes the part damage to influence the break-make of system's passageway, lead to unable judgement fuel system whether to leak, the reliability is low.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides the carbon tank ventilation magnetic valve which is simple in structure, low in cost and higher in safety and reliability.
The technical scheme adopted by the invention is as follows: the utility model provides a carbon canister ventilation magnetic valve, includes valve body subassembly, case subassembly, electro-magnet subassembly and grafting mouth subassembly, the valve body subassembly outer wall sets up the sealing washer, the one end of valve body subassembly sets up the gas channel that is used for intercommunication carbon canister and ash filter, the case subassembly sets up inside the valve body subassembly other end, electro-magnet subassembly and grafting mouth subassembly are all with the other end fixed connection of valve body subassembly, the electro-magnet subassembly is located inside the grafting mouth subassembly and with the coaxial arrangement of case subassembly, the coil joint of electro-magnet subassembly is connected with the PIN stitch on the grafting mouth subassembly, when the grafting mouth subassembly circular telegram, the case subassembly removes the gas channel disconnection under the repulsion effect of electro-magnet subassembly; when the plug interface assembly is powered off, the electromagnet assembly adsorbs the valve core assembly to enable the gas channel to be communicated.
Further, be equipped with the inside second passageway and the third passageway of intercommunication ash filter in the casing of carbon canister, the valve body subassembly is installed in the intercommunication department of first passageway and third passageway, and the valve body subassembly outer wall passes through sealing washer and first passageway and third passageway inner wall sealing connection respectively, gas passage intercommunication first passageway and second passageway.
Further, the valve body assembly comprises a valve body penetrating along the axial direction, one end of the valve body is provided with an axial channel, the side wall of the valve body is provided with a radial channel, the axial channel is communicated with the radial channel to form the gas channel, an axial ring used for being in sealing connection with the end part of the valve core assembly is arranged on the axial channel, and the sealing ring comprises a first sealing ring and a second sealing ring which are arranged on two sides of the radial channel.
Further, the valve core assembly comprises a valve core and a permanent magnet, a first blind hole is formed in the center of one end of the valve core, the permanent magnet is fixed in the first blind hole, and a sealing gasket used for being in sealing fit with an axial ring on the valve body assembly is arranged at the other end of the valve core.
Further, a plurality of second blind holes are formed in the edge of one end of the valve core at intervals along the circumference, a buffer cushion is arranged in the second blind holes, the end part of the buffer cushion protrudes out of the end face of the valve core, and a plurality of weight reduction grooves are formed in the periphery of the valve core, which is located in the first blind hole.
Further, the electromagnet assembly is fixed to the other end portion of the valve body assembly through the valve cover, one side of the valve cover is fixedly connected with the other end portion of the valve body assembly in a sealing mode, the other side of the valve cover is provided with a containing groove, a plurality of buckles are arranged on the side wall of the containing groove, and the electromagnet assembly is fixed inside the containing groove through the plurality of buckles.
Further, the electromagnet assembly comprises an iron core, an exciting coil and an armature, wherein one end of the iron core is attached to the bottom of the accommodating groove, the exciting coil is wound on the outer wall of the iron core, the armature is wrapped on the outer portion of the exciting coil and the other end of the iron core, and the exciting coil is provided with a coil joint penetrating through the armature and used for being electrified.
Still further, the interface subassembly includes that one end opening just inside hollow interface spare and sets up in the connector of interface spare outer wall, the open end and the valve body subassembly other end fixed connection of interface spare, the electro-magnet subassembly is located inside the interface spare, set up the PIN stitch in the connector, the coil joint and the PIN stitch of electro-magnet subassembly are connected.
The beneficial effects of the invention are as follows:
1. The device realizes the on-off of the system passage through the mode of matching the permanent magnet and the electromagnet, has simple structure and convenient realization, can form an independent closed system with the fuel evaporation system after being electrified, monitors whether the whole evaporation system has leakage points through the pressure sensor, and has high reliability.
2. The device outer wall sets up sealing washer can direct embedding carbon tank and lead to atmospheric port department to adapt to the different assorted carbon tank demands of different customers, need not other modes secondary connection such as rethread pipeline, guarantee the stability and the gas tightness of in-service use of installation.
3. The valve body is internally provided with no spring, so that the service life and reliability of the device can be improved, and the device failure caused by the failure of the spring can be avoided.
4. The electric control part and the fuel steam part are completely isolated through the valve cover, so that the safety and reliability are improved.
The invention can greatly reduce the development cycle and the cost of parts of a new vehicle type, has simple structure and simple manufacturing process, and the electric control part and the valve core executing part are completely isolated, so that the invention has higher safety and reliability and low cost.
Drawings
Fig. 1 is an exploded view of the present invention.
FIG. 2 is a schematic perspective exploded view of the valve body assembly of the present invention.
FIG. 3 is a partial schematic view of the valve body assembly of the present invention assembled with a carbon canister housing.
Fig. 4 is a perspective exploded view of the valve cartridge assembly of the present invention.
Fig. 5 is a cross-sectional view of the valve cartridge assembly of the present invention.
Fig. 6 is a schematic perspective view of a valve cover according to the present invention.
Fig. 7 is a cross-sectional view of an electromagnet assembly of the present invention.
Fig. 8 is a schematic perspective view of an interface module according to the present invention.
FIG. 9 is a schematic diagram of the flow of gas during normal conditions (i.e., the plug assembly is de-energized) of the venting magnetic valve of the carbon canister of the present invention.
FIG. 10 is a schematic diagram of the flow of gas during detection (i.e., energizing the plug interface assembly) of the carbon canister vent magnetic valve of the present invention.
In the figure: 100-a housing; 100 a-a first channel; 100 b-a second channel; 100 c-third channel; 10-a valve body assembly; 11-a valve body; 11 a-an axial passage; 11 b-radial channels; 11 c-an internal channel; 11d, welding ribs of the valve body; 11 e-hot riveting points; 11 f-a first groove; 11 g-second groove; 11 h-axial ring; 12-a first sealing ring; 13-a second sealing ring; 20-a valve core assembly; 21-a valve core; 21 a-a first blind hole; 21 b-a second blind hole; 21 c-an annular groove; 21 d-a weight-reducing groove; 21 e-connecting plates; 21 f-reinforcing ribs; 22-sealing gasket; 23-cushion pad; 24-permanent magnets; 30-valve cover; 30 a-a receiving groove; 30 b-valve cover welding ribs; 30 c-a buckle; 40-an electromagnet assembly; 41-an iron core; 42-exciting coil; 42 a-coil connector; 43-armature; 50-a plug interface assembly; 51-plug interface piece; 52-plug; 53-PIN PINs; 53 a-positive PIN; 53b negative PIN PINs; 54-connection holes.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other. In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the invention comprises a valve body assembly 10, a valve core assembly 20, a valve cover 30, an electromagnet assembly 40 and a plug-in port assembly 50, wherein a sealing ring is arranged on the outer wall of the valve body assembly 10, one end of the valve body assembly 10 is provided with a gas channel for communicating a carbon tank with an ash filter, the valve core assembly 20 is arranged in the other end of the valve body assembly 10, the electromagnet assembly 40 is fixed on the other end of the valve body assembly 10 in a sealing way through the valve cover 30, the plug-in port assembly 50 is fixedly connected with the other end of the valve body assembly 10, the electromagnet assembly 40 is positioned in the plug-in port assembly 50 and is coaxially arranged with the valve core assembly 20, a coil joint of the electromagnet assembly 40 is connected with a PIN on the plug-in port assembly 50, and when the plug-in port assembly 50 is electrified, the valve core assembly 20 moves to disconnect the gas channel under the repulsive force of the electromagnet assembly 40; when the plug interface assembly 50 is powered off, the electromagnet assembly 40 adsorbs the valve core assembly 20 to enable the gas channels to be communicated.
In the above scheme, as shown in fig. 2 and 3, a first channel 100a for communicating with an ash filter, a second channel 100b for communicating with the inside of the carbon tank, and a third channel 100c are provided in the housing 100 of the carbon tank, one end of the valve body assembly 10 is located at the communication position between the first channel 100a and the third channel 100c, the other end is located inside the third channel 100c, the outer wall of the valve body assembly 10 is respectively in sealing connection with the inner walls of the first channel 100a and the third channel 100c through a sealing ring, and the gas channels are communicated with the first channel 100a and the second channel 100b.
The valve body assembly 10 comprises a valve body 11, an axial channel 11a communicated with a first channel 100a is arranged inside one end of the valve body 11, a radial channel 11b communicated with a second channel 100b is arranged on the side wall of one end of the valve body 11, the axial channel 11a is communicated with the radial channel 11b to form the gas channel, an axial ring 11h is arranged inside one end of the valve body 11, one end of the axial ring is communicated with the axial channel, the other end of the axial ring is used for being in sealing connection with the end part of the valve core assembly 20, and when the valve core assembly 20 is in sealing connection with the axial ring 11h, the axial channel 11a is disconnected with the radial channel 11 b. The valve core component 20 is positioned in an inner channel 11c at the other end of the valve body, the valve body 11 is made of engineering plastics, and the valve core component is formed by integral injection molding through an injection molding process. The outer wall of the valve body 11 is respectively provided with a first groove 11f and a second groove 11g at two sides of the radial channel, a first sealing ring 12 and a second sealing ring 13 are respectively arranged in the first groove 11f and the second groove 11g, the first sealing ring 12 is in interference fit with the inner wall of the first channel 100a, and a gas channel between the carbon tank and the ash filter can be separated; the second sealing ring 13 is in interference fit with the inner wall of the third channel 100c, so that the gas channel between the carbon tank and the outside can be separated to ensure the air tightness of the carbon tank; the two sealing rings can ensure the tightness of the outer diameter of the valve body, so that the gas in the fuel system can only reach the second channel 100b or the third channel through the axial channel 11a, and if the inner channel of the valve body 11 and the valve cover 30 are welded together, the gas in the fuel system can only reach the second channel 100b through the axial channel 11a and the radial channel 11 b.
In the above scheme, as shown in fig. 4-5, the valve core assembly 20 includes a valve core 21 and a permanent magnet 24, a first blind hole 21a is disposed at the center of one end of the valve core 21, for convenience in processing, the first blind hole 21a may be a stepped hole as shown in fig. 5, the permanent magnet 24 is installed in the first blind hole 21a and is in clearance fit with the first blind hole 21a, after the assembly is completed, the end of the first blind hole 21a is closed by hot riveting or ultrasonic process, the permanent magnet 24 is fixed in the valve core 21, a boss with a smaller diameter is disposed at the other end of the valve core 21, an annular groove 21c is disposed at the outer diameter edge of the boss, a sealing pad 22 for sealing fit with an axial ring 11h on the valve body assembly 10 is installed in the annular groove 21c, the sealing pad 22 is in a ring shape, and the inner diameter size and the outer diameter of the valve core assembly structure (i.e. the annular groove) are in interference fit, and the outer diameter size of the valve core is smaller than the outer diameter of the vent hole (i.e. the axial ring) of the valve body. The valve core assembly 20 is inside the valve body assembly, the outer wall of the valve body is connected with the other end of the valve body the inner walls are in clearance fit. When the plug interface assembly 5 is electrified, the valve core assembly 20 moves from the other end to one end of the valve body 11 under the repulsive force of the electromagnet assembly 40 until the protruding part is positioned in the axial ring 11h, and the sealing gasket 22 is tightly attached to the end face of the axial ring 11h to disconnect the gas channel. The valve core 21 is provided with three weight reducing grooves 21d around the first blind hole 21a, adjacent weight reducing grooves 21d are separated by a connecting plate 21e and play a role in reinforcing and supporting, a second blind hole 21b is formed in the joint of one end edge of the valve core 21 and the connecting plate 21e, a buffer cushion 23 is arranged in the second blind hole 21b, three buffer cushions 23 are in interference fit with the second blind hole 21b, the end part of the buffer cushion 23 protrudes out of the end face of the valve core 21, and a plurality of reinforcing ribs 21f are uniformly arranged on the outer wall of the valve core 21 along the circumferential interval. The gasket 22 and the cushion 23 are made of oil-resistant rubber material, such as NBR+ PVC, NBR, FKM.
In the above scheme, as shown in fig. 6, the electromagnet assembly 40 is fixed on the other end of the valve body assembly 10 through the valve cover 30, and the valve cover 30 is made of engineering plastics, and the materials and the marks of the valve cover 30 are consistent with those of the valve body 11, so that the valve body assembly is convenient to connect and fix. The valve cover 30 is characterized in that one side of the valve cover 30 is provided with a valve cover welding rib 30b, the valve cover welding rib 30b is integrated with the valve body welding rib 11d through a rotary welding or ultrasonic welding process, the valve cover 30 is fixedly connected with the valve body 11 in a sealing mode, the other side of the valve cover 30 is provided with a containing groove 30a, the side wall of the containing groove 30a is provided with a plurality of buckles 30c, the buckles 30c are chamfers with inwards buckled end parts, the electromagnet assembly 40 is fixed inside the containing groove 30a through the plurality of buckles 30c, and the electromagnet assembly 40 cannot be separated from the valve cover 30 after assembly.
In the above scheme, as shown in fig. 7, the electromagnet assembly 40 includes an iron core 41, an exciting coil 42 and an armature 43, one end of the iron core 41 is attached to the bottom of the accommodating groove 30a, the exciting coil 42 is wound on the outer wall of the iron core 41, the armature 43 is wrapped outside the exciting coil 42 and the other end of the iron core 41, and the exciting coil 42 has two coil connectors 42a and 42b penetrating through the armature for energizing. The operating voltage of the electromagnet assembly 40 is 9-12V, the resistance of the exciting coil 42 is 20Ω, and when the two coil joints 42a &42b of the exciting coil are energized, the electromagnet assembly 40 becomes a magnet due to the electromagnetic induction effect; the magnetic poles and the permanent magnets 24 in the valve core assembly 20 are corresponding (peer) in magnetic pole direction; when the power is off, the iron core 41 can adsorb the permanent magnet 24 in the valve core assembly 20, so that the valve core assembly 20 and the valve cover 30 are tightly attached.
In the above scheme, as shown in fig. 8, the plug interface assembly 50 includes a plug interface member 51 with an opening at one end and a hollow interior, and a plug connector 52 disposed on an outer wall of the plug interface member, six connection holes 54 are disposed on a connection plate at the opening end of the plug interface member 51, and the connection holes 54 are fixed with the hot riveting point 11e on the valve body through a hot riveting or ultrasonic process, or may be fixed in other manners. The electromagnet assembly 40 is located inside the socket component 51, PIN PINs 53 are disposed in the socket head 52, the PIN PINs include positive PIN PINs 53a and negative PIN PINs 53b, two coil connectors 42a and 42b of the electromagnet assembly 40 are respectively connected with the positive PIN PINs 53a and the negative PIN PINs 53b, and the connection mode is fixed or welded by a plug.
The working method comprises the following steps:
In a normal state (i.e. when the plug interface assembly is powered off), as shown in fig. 9, the ventilation magnetic valve of the carbon tank is in an air flow unblocked state, and the iron core 41 in the electromagnet assembly 40 can adsorb the permanent magnet 24 in the valve core assembly 20, so that the valve core assembly 20 and the valve cover 30 are tightly attached, and thus the fuel vapor in the fuel evaporation control system freely passes through the second channel 100b of the carbon tank shell and the air channel of the valve body.
In the case of the plug-in port assembly being electrified, as shown in fig. 10, the ventilation magnetic valve of the carbon tank is in an air flow closing state, two coil joints 42a and 42b of the exciting coil 42 are electrified, the electromagnetic induction effect electromagnet assembly 40 becomes a magnet, the magnetic pole corresponds to the magnetic pole of the permanent magnet 24 in the valve core assembly 20 (the magnet peer-to-peer repulsion), the valve core assembly 20 is subjected to repulsive force to move towards the axial channel 11a of the valve body 11, and finally the sealing gasket 22 is attached to the axial ring 11h to close the air channel of the valve body 11. A closed system is formed in the fuel evaporation control system, and whether a leakage point exists in the whole evaporation system is monitored through a pressure sensor.
What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (6)
1. A carbon tank ventilation magnetic valve which is characterized in that: the device comprises a valve body assembly (10), a valve core assembly (20), an electromagnet assembly (40) and a plug interface assembly (50), wherein a sealing ring is arranged on the outer wall of the valve body assembly (10), one end of the valve body assembly (10) is provided with a gas channel for communicating a carbon tank with an ash filter, the valve core assembly (20) is arranged inside the other end of the valve body assembly (10), the electromagnet assembly (40) and the plug interface assembly (50) are fixedly connected with the other end of the valve body assembly (10), the electromagnet assembly (40) is positioned inside the plug interface assembly (50) and is coaxially arranged with the valve core assembly (20), a coil joint of the electromagnet assembly (40) is connected with a PIN PIN on the plug interface assembly (50), and when the plug interface assembly (50) is electrified, the valve core assembly (20) moves under the repulsive force action of the electromagnet assembly (40) to disconnect the gas channel; when the plug interface assembly (50) is powered off, the electromagnet assembly (40) adsorbs the valve core assembly (20) to enable the gas channel to be communicated;
A first channel (100 a) communicated with an ash filter, a second channel (100 b) communicated with the inside of the carbon tank and a third channel (100 c) are arranged in a shell (100) of the carbon tank, a valve body assembly (10) is arranged at the communication position of the first channel (100 a) and the third channel (100 c), the outer wall of the valve body assembly (10) is respectively in sealing connection with the inner walls of the first channel (100 a) and the third channel (100 c) through sealing rings, and the gas channels are communicated with the first channel (100 a) and the second channel (100 b);
the valve core assembly (20) comprises a valve core (21) and a permanent magnet (24), a first blind hole (21 a) is formed in the center of one end of the valve core (21), the permanent magnet (24) is fixed in the first blind hole (21 a), and a sealing gasket (22) used for being in sealing fit with an axial ring on the valve body assembly is arranged at the other end of the valve core (21).
2. The canister vent magnetic valve of claim 1, wherein: the valve body assembly (10) comprises a valve body (11) penetrating in the axial direction, an axial channel (11 a) is formed in one end of the valve body (11), a radial channel (11 b) is formed in the side wall of the valve body, the axial channel (11 a) is communicated with the radial channel (11 b) to form the gas channel, an axial ring (11 h) used for being in sealing connection with the end part of the valve core assembly is arranged on the axial channel (11 a), and the sealing rings comprise a first sealing ring (12) and a second sealing ring (13) which are arranged on two sides of the radial channel (11 b).
3. The canister vent magnetic valve of claim 1, wherein: a plurality of second blind holes (21 b) are formed in the edge of one end of the valve core (21) at intervals along the circumference, a buffer cushion (23) is arranged in the second blind holes (21 b), the end part of the buffer cushion (23) protrudes out of the end face of the valve core, and a plurality of weight-reducing grooves (21 d) are formed in the periphery of the valve core (21) located in the first blind holes (21 a).
4. The canister vent magnetic valve of claim 1, wherein: the electromagnet assembly (40) is fixed to the other end portion of the valve body assembly (10) through the valve cover (30), one side of the valve cover (30) is fixedly connected with the other end portion of the valve body assembly (10) in a sealing mode, the other side of the valve cover (30) is provided with the containing groove (30 a), the side wall of the containing groove (30 a) is provided with a plurality of buckles (30 c), and the electromagnet assembly (40) is fixed inside the containing groove (30 a) through the plurality of buckles (30 c).
5. The canister vent magnetic valve of claim 4, wherein: the electromagnet assembly (40) comprises an iron core (41), an exciting coil (42) and an armature (43), wherein one end of the iron core (41) is attached to the bottom of the accommodating groove (30 a), the exciting coil (42) is wound on the outer wall of the iron core (41), the armature (43) is wrapped outside the exciting coil and the other end of the iron core (41), and the exciting coil (42) is provided with a coil joint penetrating through the armature and used for being electrified.
6. The canister vent magnetic valve of claim 1, wherein: the plug interface assembly (50) comprises a plug interface piece (51) with one end being open and the inside being hollow and a plug connector (52) arranged on the outer wall of the plug interface piece, the open end of the plug interface piece (51) is fixedly connected with the other end of the valve body assembly (10), the electromagnet assembly (40) is located inside the plug interface piece (51), a PIN PIN (53) is arranged in the plug connector (52), and a coil connector of the electromagnet assembly (40) is connected with the PIN PIN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910734126.4A CN110397748B (en) | 2019-08-09 | 2019-08-09 | Magnetic valve for ventilation of carbon tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910734126.4A CN110397748B (en) | 2019-08-09 | 2019-08-09 | Magnetic valve for ventilation of carbon tank |
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| CN110397748A CN110397748A (en) | 2019-11-01 |
| CN110397748B true CN110397748B (en) | 2024-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910734126.4A Active CN110397748B (en) | 2019-08-09 | 2019-08-09 | Magnetic valve for ventilation of carbon tank |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113107713B (en) * | 2021-04-07 | 2022-06-24 | 东风富士汤姆森调温器有限公司 | Multifunctional HC capturing device and fuel evaporation control system thereof |
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