JP2021085333A - Purge control valve device - Google Patents

Abstract

To provide a purge control valve device enabling reduction in the number of components.SOLUTION: A purge valve 3 includes a first inner passage 43a and a second inner passage 43b, which are part of an inner passage communicating an inflow port 31a with an outflow port 32a. The purge valve 3 includes: a first solenoid valve 37; a second solenoid valve 38; and an inflow side housing 31 incorporating both of the first solenoid valve 37 and the second solenoid valve 38 which are molded with resin. The purge valve 3 includes a seat valve member 33 in which a first valve seat 332a on which a first valve element 42a is seated and a second valve seat 332b on which a second valve element 42b is seated are integrally formed. The seat valve member 33 is coupled to the inflow side housing 31 through welding or bonding.SELECTED DRAWING: Figure 10

Description

The disclosure herein relates to a purge control valve device.

Patent Document 1 discloses a purge control valve device including two housings each containing one solenoid valve. The purge control valve device of Patent Document 1 includes two housings containing solenoid valves and two seat valve members each having a valve seat on which each solenoid valve is seated.

Japanese Patent No. 5717876

The device of Patent Document 1 includes two housings each containing a solenoid valve and two seat valve members. Therefore, there is a problem that the number of parts is large.

One of the purposes disclosed in this specification is to provide a purge control valve device capable of reducing the number of parts.

The plurality of aspects disclosed herein employ different technical means to achieve their respective objectives. Further, the scope of claims and the reference numerals in parentheses described in this section are examples showing the correspondence with the specific means described in the embodiment described later as one embodiment, and limit the technical scope. is not it.

One of the disclosed purge control valve devices includes an inflow port (31a) into which the solenoid fuel spilled from the canister (13) flows in, and an outflow port (32a) in which the solenoid fuel flows out toward the engine (2). A first internal passage (43a) and a second internal passage (43b), which are a part of an internal passage connecting the inflow port and the outflow port, and a first valve body (42a) capable of opening and closing the first internal passage. A first solenoid unit (37) that generates an electromagnetic force to displace, a second solenoid unit (38) that generates an electromagnetic force that displaces a second valve body (42b) that can open and close the second internal passage, and a first. A solenoid housing (31) in which both the solenoid part and the second solenoid part are resin-molded and built in, and a first valve seat (332a) in which the first valve body is seated and a second valve seat in which the second valve body is seated. (332b) is integrally formed, and includes a resin seat valve member (33) that is welded or bonded to the solenoid housing.

According to this device, a solenoid housing in which two solenoid portions are resin-molded and a seat valve member in which two valve seats are integrally formed and bonded or adhered to the solenoid housing are provided. According to this purge control valve device, two solenoid valves and two valve seats can be composed of two members. From the above, the purge control valve device can reduce the number of parts. Further, the purge control valve device can reduce the area of the joint portion by welding or adhesion as compared with the case where the member having the first valve seat and the member having the second valve body are provided.

It is a block diagram of the evaporative fuel processing apparatus provided with the purge control valve apparatus of 1st Embodiment. It is a partial cross-sectional view of the purge control valve device which looked at the 3rd attachment part from the front. It is a rear view of the purge control valve device. It is a side view of the purge control valve device which looked at the 2nd attached part from the front. It is a side view of the purge control valve device which saw the 1st attached part from the front. It is an external view of the purge control valve device seen from the inflow side housing side. It is an external view of the purge control valve device seen from the outflow side housing side. It is a schematic diagram which shows the positional relationship of two solenoid valves, an inflow port and an outflow port. It is sectional drawing in the IX-IX cross section of FIG. FIG. 5 is a cross-sectional view taken along the line XX of FIG. It is a partial cross-sectional view of the joint part of a housing and a seat valve member. It is a figure which shows the joint part in the inflow side housing. It is a figure which shows the joint part in the seat valve member. It is a figure which shows the joint part in the seat valve member.

Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. In each form, the same reference numerals may be attached to the parts corresponding to the matters described in the preceding forms, and duplicate explanations may be omitted. When only a part of the configuration is described in each form, the other forms described above can be applied to the other parts of the configuration. Not only the combination of the parts that clearly indicate that the combination is possible in each embodiment, but also the combination of the embodiments even if it is not specified if there is no particular problem in the combination. It is also possible.

<First Embodiment>
The first embodiment will be described with reference to FIGS. 1 to 14. The purge control valve device is used in the evaporative fuel processing device 1 which is an evaporative fuel purging system mounted on a vehicle. The purge valve 3 is an example of a purge control valve device. As shown in FIG. 1, the evaporative fuel processing device 1 supplies HC gas or the like in the fuel adsorbed on the canister 13 to the intake passage of the engine 2. This makes it possible to prevent the evaporated fuel from the fuel tank 10 from being released into the atmosphere. The evaporative fuel processing device 1 includes an intake system of the engine 2 that constitutes an intake passage of the engine 2 that is an internal combustion engine, and an evaporative fuel purge system that supplies the evaporative fuel to the intake system of the engine 2.

The evaporated fuel introduced into the intake passage by the intake pressure of the engine 2 is mixed with the combustion fuel supplied to the engine 2 from the injector or the like and burned in the combustion chamber of the engine 2. The engine 2 mixes and burns at least the evaporated fuel desorbed from the canister 13 and the combustion fuel. In the intake system of the engine 2, the intake pipe 21 constituting the intake passage is connected to the intake manifold 20. This intake system is further configured by providing a throttle valve 25, an air filter 24, and the like in the middle of the intake pipe 21.

In the evaporative fuel purge system, the fuel tank 10 and the canister 13 are connected by a pipe 11 constituting a vapor passage. In the evaporative fuel purge system, the canister 13 and the intake pipe 21 are connected to each other via a pipe 14 constituting a purge passage and a purge valve 3. Further, a purge pump may be provided in the middle of the purge passage. The air filter 24 is provided in the upstream portion of the intake pipe 21 and captures dust, dust, etc. in the intake pipe. The throttle valve 25 is an intake air amount adjusting valve that adjusts the opening degree of the inlet portion of the intake manifold 20 to adjust the intake air amount flowing into the intake manifold 20. The intake air passes through the intake air passage, flows into the intake manifold 20, is mixed with the combustion fuel injected from the injector or the like so as to have a predetermined air-fuel ratio, and is burned in the combustion chamber.

The fuel tank 10 is a container for storing fuel such as gasoline. The fuel tank 10 is connected to the inflow portion of the canister 13 by a pipe 11 forming a vapor passage. The canister 13 is a container in which an adsorbent such as activated carbon is sealed. The canister 13 takes in the evaporated fuel generated in the fuel tank 10 through the vapor passage and temporarily adsorbs it to the adsorbent.

The canister 13 is integrally provided with a valve module 12, or is provided via a duct portion. The valve module 12 includes a canister closed valve and an internal pump. The canister close valve opens and closes the suction section for sucking in fresh air from the outside. The internal pump is a pump capable of releasing gas to the atmosphere and inhaling the atmosphere. By providing the canister 13 with a canister close valve, atmospheric pressure can be applied to the inside of the canister 13. The canister 13 can easily desorb, that is, purge the evaporated fuel adsorbed on the adsorbent by the sucked fresh air.

The purge valve 3 is a purge control valve device including a valve body that opens and closes an internal passage that is a part of the purge passage. The purge control valve device has a plurality of solenoid valves inside. The purge valve 3 can allow and block the supply of evaporative fuel from the canister 13 to the engine 2. The configuration of the purge valve 3 will be described. The purge valve 3 has a solenoid valve that opens and closes each of a plurality of internal passages provided inside the housing. The purge valve 3 includes one inflow port 31a and one outflow port 32a. The inflow port 31a communicates with the canister 13 via the connected pipe 14. The inflow port 31a has an inflow passage 31a1 into which the evaporated fuel flowing out from the canister 13 flows in. The outflow port 32a communicates with the intake pipe 21 via a connected pipe. The outflow port 32a has an outflow passage 32a1 in which the evaporated fuel flows out toward the engine 2. Inside the purge valve 3, two internal passages branching on the downstream side of the inflow port 31a are provided. These two internal passages are further downstream and are concentrated in the outflow port 32a. Each of the two internal passages is a passage that is individually opened and closed by a solenoid valve.

When the purge valve 3 is opened by the control device while the vehicle is traveling, a difference between the negative pressure in the intake manifold 20 generated by the suction action of the piston and the atmospheric pressure applied to the canister 13 occurs. Due to this pressure difference, the vapor fuel adsorbed in the canister 13 flows through the purge passage and the purge valve 3 and is sucked into the intake manifold 20 through the intake pipe 21.

The evaporated fuel sucked into the intake manifold 20 is mixed with the original combustion fuel supplied from the injector or the like to the engine 2 and burned in the cylinder of the engine 2. In the cylinder of the engine 2, the air-fuel ratio, which is the mixing ratio of the combustion fuel and the intake air, is controlled to be a predetermined air-fuel ratio. The control device adjusts the purge amount of the evaporated fuel so that the predetermined air-fuel ratio is maintained even if the evaporated fuel is purged by controlling the purge valve 3 with duty energization.

As shown in FIGS. 2, 8 and 10, the purge valve 3 incorporates a first solenoid valve 37 and a second solenoid valve 38 as an example of a plurality of solenoid valves. Each of the first solenoid valve 37 and the second solenoid valve 38 is composed of similar components. Each of the first solenoid valve 37 and the second solenoid valve 38 has a solenoid portion 41, a valve body 42, and a tubular portion 331. The first solenoid valve 37 includes a first valve body 42a and a first solenoid unit that generates an electromagnetic force that displaces the first valve body 42a. The first valve body 42a can open and close the first internal passage 43a communicating with the inside of one tubular portion 331. The second solenoid valve 38 includes a second valve body 42b and a second solenoid portion that generates an electromagnetic force that displaces the second valve body 42b. The second valve body 42b can open and close the second internal passage 43b communicating with the other tubular portion 331. A valve seat 332 is provided at the end of the tubular portion 331 so that the valve body is seated in the closed state and separated in the open state. The first solenoid valve 37 and the second solenoid valve 38 are, for example, normally closed type valves controlled to be in a closed state in which the internal passage is closed when no voltage is applied and in an open state in which the internal passage is opened when a voltage is applied.

The solenoid portion 41 of each solenoid valve includes a coil portion 410, a bobbin 411, a fixed core 413, a movable core 412, a shaft member 415, a spring 414, and the like. The solenoid portion 41 is covered with a coating portion formed of a resin material. The covering is integrally formed with the housing. It can be said that the solenoid portion 41 is resin-molded by the covering portion. The first solenoid portion and the second solenoid portion are resin-molded and are built in the inflow side housing 31. The inflow side housing 31 is an example of a solenoid housing having a built-in solenoid portion. The central axis of the solenoid unit 41 is also the central axis of the solenoid valve. Since the solenoid portion 41 has a higher specific gravity than the housing, the solenoid portion tends to vibrate with respect to an external force.

The movable core 412 is made of a material that conducts magnetism, for example, a magnetic material. The movable core 412, which is a tubular body, surrounds the shaft member 415 and the spring 414 in a state of being interpolated from the open end. The valve body 42 is made of an elastically deformable material such as rubber. The valve body 42 is attached to the movable core 412 so as to sandwich the head of the movable core 412 from both sides between the base portion and the valve portion, and is integrated with the movable core 412.

The fixed core 413 slidably supports a movable core 412 that moves in the axial direction against the urging force of the spring 414 by an electromagnetic force. The spring 414 has a tubular portion of the movable core 412 in a state where one end in the axial direction is in contact with the shaft member 415 fixed to the fixed core 413 and the other end in the axial direction is in contact with the head of the movable core 412. It is provided inside. Therefore, the spring 414 provides an urging force to move the movable core 412 toward the valve seat 332 side. The fixed core 413 fixes the shaft member 415 and is assembled to the bobbin 411. The fixed core 413, the shaft member 415, the movable core 412, and the valve body 42 are installed so that their axes are coaxial. The shaft member 415 is formed of, for example, nylon or nylon reinforced by containing glass fiber. The fixed core 413 and the movable core 412 are made of a material that allows magnetism to pass through. The fixed core 413 is formed of, for example, a carbon steel wire for cold heading. Each solenoid valve opens and closes the internal passage 43 by driving the valve body 42 according to the balance between the electromagnetic force generated when the coil portion 410 is energized and the urging force of the spring 414.

The housing is provided with a connector 31c extending from the solenoid portion 41 side of the first solenoid valve 37 in a direction orthogonal to the central axis of the solenoid portion 41. The housing is provided with a connector 31d extending from the solenoid portion 41 side of the second solenoid valve 38 in a direction orthogonal to the central axis of the solenoid portion 41. Each connector has a built-in terminal for energizing the coil portion 410. The connector is a resin molded portion that supports a terminal that penetrates the bottom of the housing and projects outward. The terminal is an energizing terminal that is electrically connected to the coil portion 410. A power supply side connector for supplying power from a power supply unit or a current control device is connected to the connector. When the connector and the power supply side connector are connected and the terminal is electrically connected to the current control device or the like, the purge valve 3 can control the current energizing the coil portion 410.

As shown in FIGS. 2 to 10, the purge valve 3 includes an inflow side housing 31, an outflow side housing 32, and a seat valve member 33 as housings. The inflow side housing 31, the outflow side housing 32, and the seat valve member 33 are made of a resin material. The inflow side housing 31 includes an inflow port 31a into which the evaporated fuel from the canister 13 flows in, and an inflow side chamber chamber 31b provided downstream of the inflow port 31a. The inflow side housing 31 is provided with a flange portion 31f. The inflow side housing 31 and the outflow side housing 32 are integrally joined by overlapping the flange portions of both with the outer peripheral edge of the seat valve member 33 sandwiched between them. The flange portion 31f of the inflow side housing 31 is a portion that radially protrudes from the outer peripheral edge of the downstream opening located at the downstream end portion of the inflow side housing 31. As shown in FIG. 11, the flange portion 31f is bonded to the flange portion 32f of the outflow side housing 32 by welding or adhesion.

The inflow port 31a is a tubular portion having an inflow passage for fluid inside, and is located at an upstream end portion of the inflow side housing 31. The inflow port 31a is connected to a pipe 14 forming a purge passage in the evaporative fuel processing device 1, and communicates with the canister 13 via the pipe 14.

The inflow side chamber chamber 31b communicates with the inflow passage 31a1 at the upstream end, which has a smaller passage crossing area than the inflow side chamber chamber 31b. The inflow passage 31a1 and the inflow side chamber chamber 31b are provided so as to line up in the inflow direction of the fluid in the inflow passage 31a1. The downstream end of the inflow passage 31a1 is a chamber chamber inflow portion 31a2 facing the inflow side chamber chamber 31b. As shown in FIG. 9, the upstream end of the first internal passage 43a is located in the inflow direction in which the evaporated fuel flows down the inflow passage 31a1 rather than the chamber chamber inflow portion 31a2. The inflow direction is a direction along the axial direction of the inflow port 31a. The inflow side chamber chamber 31b communicates with the first internal passage 43a and the second internal passage 43b downstream of the inflow side chamber chamber 31b. The passage crossing area in the inflow port 31a is the cross-sectional area when the inflow port 31a is cut by a plane orthogonal to the central axis of the passage. The passage crossing area of the inflow side chamber chamber 31b is the cross-sectional area when the inflow side chamber chamber 31b is cut by a plane orthogonal to the central axis of the passage formed by the inflow side chamber chamber 31b. The passage crossing area of the passage in the purge valve 3 sharply increases when the passage in the inflow port 31a advances to the inflow side chamber chamber 31b. The inflow side chamber chamber 31b provides a chamber volume that suppresses the pulsation that occurs in the purge valve 3.

The inflow side housing 31 includes a first side wall 311, a second side wall 312, a third side wall 313, and a fourth side wall 314. The inflow side housing 31 includes a connecting wall portion that faces the downstream opening and connects these side walls. As shown in FIG. 6, the connecting wall portion is a wall portion that covers the axial end portions of the first solenoid valve 37 and the second solenoid valve 38 and the inflow side chamber chamber 31b. The inflow port 31a is located closer to the outflow side housing 32 than the connecting wall portion. The inflow port 31a is located inside the connecting wall portion without protruding outward. The inflow port 31a extends along the connecting wall portion, the third side wall 313, and the fourth side wall 314. The inflow port 31a is provided so that the height dimension from the flange portion 31f is lower than that of the connecting wall portion.

The first side wall 311 and the second side wall 312 face each other. The third side wall 313 and the fourth side wall 314 face each other. The first side wall 311 connects the third side wall 313 and the fourth side wall 314 adjacent to each other. The second side wall 312 connects the third side wall 313 and the fourth side wall 314 adjacent to each other. The connector 31c and the connector 31d extend outward from the third side wall 313.

The inflow side housing 31 accommodates the first solenoid valve 37 and the second solenoid valve 38. As shown in FIG. 6, the first solenoid valve 37 and the second solenoid valve 38 are arranged side by side in the inflow side housing 31 on one side closer to the third side wall 313. The first solenoid valve 37 and the second solenoid valve 38 are arranged along the third side wall 313. The first solenoid valve 37 is arranged so as to be adjacent to both the first side wall 311 and the third side wall 313. The second solenoid valve 38 is arranged so as to be adjacent to both the second side wall 312 and the third side wall 313. The inflow port 31a and the inflow side chamber chamber 31b are arranged in the inflow side housing 31 on the other side opposite to the first solenoid valve 37 and the second solenoid valve 38. The inflow port 31a and the inflow side chamber chamber 31b are arranged so as to be arranged in the alignment direction of the first solenoid valve 37 and the second solenoid valve 38. The inflow side chamber chamber 31b is formed between the fourth side wall 314 and the first solenoid valve 37 and the second solenoid valve 38.

The seat valve member 33 has two tubular portions 331. Each of the two tubular portions 331 has a shape protruding from both sides of the plate-shaped portion 333. The tubular portion 331 has an upstream-side protruding portion that protrudes to the upstream side or the valve body side, and a downstream-side protruding portion that protrudes to the downstream side or the outflow port 32a side. The flange portion 33f located on the outer peripheral edge of the plate-shaped portion 333 is a portion sandwiched between the inflow side housing 31 and the outflow side housing 32 as shown in FIG. The plate-shaped portion 333 of the seat valve member 33 is a partition wall portion that separates the inflow side housing 31 side and the outflow side housing 32 side in the purge valve 3. The two tubular portions 331 are a first tubular portion 331a located on the first solenoid valve 37 side and a second tubular portion 331b located on the second solenoid valve 38 side.

The first tubular portion 331a has an internal first internal passage 43a and a first valve seat 332a formed at the tip thereof. The first valve body 42a is seated on the first valve seat 332a when the valve is closed. The second tubular portion 331b has an internal second internal passage 43b and a second valve seat 332b formed at the tip thereof. The second valve body 42b is seated on the second valve seat 332b when the valve is closed. These two valve seats 332 are located inside the inflow side housing 31. The downstream end portion 331a1 of the first tubular portion 331a and the downstream end portion 331b1 of the second tubular portion 331b are located inside the outflow side housing 32.

As shown in FIG. 9, the upstream end of the second internal passage 43b is located on the side opposite to the inflow direction of the fluid in the inflow passage 31a1 with respect to the chamber chamber inflow portion 31a2. The upstream end of the second internal passage 43b is located on the side opposite to the side where the first internal passage 43a is located with respect to the chamber chamber inflow portion 31a2 in the inflow direction of the fluid.

The first internal passage 43a is a passage in which the flow rate of the fluid flowing down is larger than that of the second internal passage 43b. The internal passage of the housing includes a large flow rate side passage through which the evaporated fuel flows down into the first internal passage 43a and a small flow rate side passage through which the evaporated fuel flows down into the second internal passage 43b. The large flow rate side flow path is a flow path through which the evaporated fuel flows down in the order of the inflow passage 31a1, the inflow side chamber chamber 31b, the first connecting passage 315, and the first internal passage 43a. The small flow rate side flow path is a flow path through which the evaporated fuel flows down in the order of the inflow passage 31a1, the inflow side chamber chamber 31b, the second connecting passage 316, and the second internal passage 43b. The inflow side chamber chamber 31b is a common passage in the large flow rate side flow path and the small flow rate side flow rate. The evaporated fuel is divided from the inflow side chamber chamber 31b into a flow path that flows down to the first internal passage 43a and a flow path that flows down to the second internal passage 43b.

The first connecting passage 315 is a passage connecting the first internal passage 43a and the inflow side chamber chamber 31b on the upstream side of the first internal passage 43a. The first connecting passage 315 is a passage provided closer to the inflow passage 31a1 than the first solenoid portion. A filter member 44 having a filter media unit or a net unit supported by the filter frame unit 44a is installed in the first connecting passage 315. The filter member 44 of the first connecting passage 315 collects foreign matter contained in the evaporated fuel before flowing down from the inflow side chamber chamber 31b and flowing down to the first internal passage 43a.

The second connecting passage 316 is a passage connecting the second internal passage 43b and the inflow side chamber chamber 31b on the upstream side of the second internal passage 43b. The second connecting passage 316 is a passage provided closer to the inflow passage 31a1 than the second solenoid portion. The second connecting passage 316 is formed so that the passage crossing area is smaller than that of the first connecting passage 315 and the inflow side chamber chamber 31b, respectively. With this configuration, when the evaporated fuel flows from the inflow side chamber chamber 31b into the second connecting passage 316, it flows down from the wide passage to the narrow passage, so that the pressure loss becomes large. As a result, the pressure loss of the flow path leading to the second internal passage 43b, which has a small flow rate, can be further increased. Therefore, the purge valve 3 can widen the flow rate range in the small flow rate range. A filter member 44 having a filter media unit or a net unit supported by the filter frame unit 44a is installed in the second connecting passage 316. The filter member 44 of the second connecting passage 316 collects foreign matter contained in the evaporated fuel before flowing down from the inflow side chamber chamber 31b and flowing down to the second internal passage 43b.

As shown in FIGS. 9 to 10, the first internal passage 43a and the second internal passage 43b are located on one side in the orthogonal direction orthogonal to the inflow direction of the fluid. The inflow passage 31a1 is located on the other side of the housing in the orthogonal direction. The orthogonal direction is a direction orthogonal to both the coupling direction of the inflow side housing 31 and the outflow side housing 32 and the inflow direction. The bonding direction is also the stacking direction of the inflow side housing 31 and the outflow side housing 32. According to this configuration, a large flow rate side flow path from the inflow passage 31a1 to the first internal passage 43a via the inflow side chamber chamber 31b can be extended in a direction orthogonal to the inflow direction. As a result, the chamber chamber inflow portion 31a2 and the first internal passage 43a can be arranged diagonally in the housing. Therefore, the large flow rate side flow path can be set long, and a flow path with further suppressed pressure loss can be provided.

The outflow port 32a is located between the inflow port 31a and the first internal passage 43a and the second internal passage 43b in the orthogonal direction. According to this configuration, the evaporated fuel can flow down the flow path in the orthogonal direction for a long time in the flow path from the inflow side chamber chamber 31b to the first internal passage 43a and the second internal passage 43b. Since the flow path in the orthogonal direction can be long, the flow path resistance in the large flow rate side flow path and the small flow rate side flow path can be suppressed, which can contribute to securing the flow rate. The downstream end of the first internal passage 43a is provided at a position closer to the upstream end of the outflow passage 32a1 than the downstream end of the second internal passage 43b. With this configuration, the flow path resistance of the large flow rate side flow path can be suppressed more than the flow rate resistance of the small flow rate side flow rate even in the flow path on the outflow passage 32a1 side. Therefore, it is possible to contribute to securing a large flow rate in the purge valve 3.

The purge valve 3 has a configuration in which the pressure loss is concentrated in the flow rate on the small flow rate side in the flow path from the inflow passage 31a1 to the internal passage in which the opening degree of each valve body is adjusted. The purge valve 3 provides a flow path configuration in which the flow path does not bend in the opposite direction or passes through an extremely narrow flow path for the large flow rate side flow path. The purge valve 3 provides a flow path configuration in which the flow rate resistance is larger than that of the large flow rate side flow rate by having the flow rate in the opposite direction with respect to the small flow rate side flow rate.

As shown in FIG. 10, the outflow side housing 32 surrounds the downstream side protruding portion protruding from the plate-shaped portion 333 of the seat valve member 33 in the two tubular portions 331. The first tubular portion 331a and the second tubular portion 331b have a shape extending along each other. The downstream protruding portion of the first tubular portion 331a is longer than the downstream protruding portion of the second tubular portion 331b. The first tubular portion 331a is configured such that the axial length from the valve seat to the downstream end portion 331a1 is longer than that of the second tubular portion 331b. The downstream end portion 331a1 is located at a position separated from the plate-shaped portion 333 of the seat valve member 33 from the downstream end portion 331b1. The first tubular portion 331a forms an internal passage longer than the second tubular portion 331b. Therefore, the first tubular portion 331a having a larger flow rate than the second tubular portion 331b is longer. This configuration is advantageous in securing the flow rate under the condition that the engine 2 side has a low negative pressure, and it is more efficient to lengthen the first tubular portion 331a. On the other hand, even if the second tubular portion 331b is made longer, the effect of securing the flow rate is low. Therefore, by shortening the second tubular portion 331b, the physique of the housing can be suppressed at the relevant portion, and the amount of the material forming the second tubular portion 331b can be suppressed.

The outflow side housing 32 includes an outflow port 32a for flowing out the evaporated fuel toward the intake pipe 21 and an outflow side chamber chamber 32b provided on the upstream side of the outflow port 32a. The flange portion 32f of the outflow side housing 32 is a portion that radially protrudes from the outer peripheral edge of the upstream opening located at the upstream end portion of the outflow side housing 32. The outflow side chamber chamber 32b communicates with the outflow passage 32a1 in the outflow port 32a, which has a smaller passage crossing area than the outflow side chamber chamber 32b at the downstream end. The outflow side chamber chamber 32b connects the outflow port 32a with the first internal passage 43a and the second internal passage 43b inside the housing.

The outflow port 32a is a tubular portion having an outflow passage for the fluid inside, and is located at the downstream end of the outflow side housing 32. The outflow port 32a communicates with the intake pipe 21 via a connected pipe. The outflow port 32a is preferably located closer to the inflow side housing 31 than the outermost wall portion forming the outflow side housing 32. The outflow port 32a is located inside the outermost wall portion without protruding outward. The outflow port 32a is arranged so as to be arranged in the alignment direction of the first solenoid valve 37 and the second solenoid valve 38. The outflow port 32a extends toward the tip along the same direction as the inflow port 31a. The outflow port 32a is provided so that the height dimension from the flange portion 32f is equal to or lower than the outermost wall portion of the outflow side housing 32.

The seat valve member 33 is welded or bonded to the inflow side housing 31 or the outflow side housing 32. The seat valve member 33 and the inflow side housing 31 or the outflow side housing 32 form a joint portion 317b that is joined by welding or adhesion. Welding can be performed by, for example, laser welding in which resin members are welded to each other using a laser. Welding is performed by superimposing the joint portion of the seat valve member 33 and the joint portion of the housing and irradiating the seat valve member 33 with a laser to melt the joint portion of the housing. In this case, the seat valve member 33 is made of a resin material that is transparent to laser light. The housing is composed of a member that absorbs laser light by containing, for example, carbon. Adhesion can be performed, for example, by forming a laminated portion with an adhesive interposed between the joint portion of the seat valve member 33 and the joint portion of the housing, and applying heat to the laminated portion.

11 to 14 show an example in which the seat valve member 33 and the inflow side housing 31 are joined by welding or adhesion. 13 and 14 are shown from both sides so that the position of the joint portion 317b on the seat valve member 33 can be easily understood.

As shown in FIG. 11, the flange portion 33f is sandwiched between the annular recess 317 located inside the flange portion 31f and the portion located on the inner peripheral side of the flange portion 32f. The annular recess 317 is a portion recessed from the flange portion 31f, and is provided on an inner peripheral edge portion located inside the flange portion 31f. The contact portion between the annular recess 317 and the flange portion 33f is joined by welding or adhesion.

As shown in FIGS. 12 to 14, the contact portion between the annular recess 317 and the flange portion 33f constitutes a peripheral coupling portion 317b1 which is a part of the coupling portion 317b. The peripheral coupling portion 317b1 is provided on substantially the entire area on the annular recess 317. The peripheral coupling portion 317b1 is provided on substantially the entire area on the surface of the flange portion 33f on the inflow side housing 31 side. The peripheral coupling portion 317b1 is formed so as to surround the periphery of the first tubular portion 331a and the second tubular portion 331b. As shown in FIG. 12, the peripheral coupling portion 317b1 is provided on the inner peripheral edge portion along the flange portion 33f. As shown in FIG. 14, the peripheral coupling portion 317b1 is provided along the outer peripheral edge portion of the surface of the plate-shaped portion 333 on the valve seat side.

The purge valve 3 includes a partition joint portion 371b2 as a part of the joint portion 317b. The coupling portion 317b includes a peripheral coupling portion 317b1 and a partition coupling portion 371b2 extending from the peripheral coupling portion 317b1. The partition joint portion 371b2 is a portion of the seat valve member 33 and the inflow side housing 31 that are joined by welding or adhesion. As shown in FIGS. 12 and 14, the partition joint portion 371b2 extends seamlessly from the peripheral joint portion 317b1. As shown in FIG. 12, the inflow side housing 31 is provided with a partition wall 318 extending inward without a break from the annular recess 317. The partition wall 318 extends from the annular recess 317 in the inflow side housing 31 so as to cross between the first solenoid portion and the second solenoid portion. The partition wall 318 is a protruding wall extending inward from the annular recess 317 so as to cross between the first tubular portion 331a and the second tubular portion 331b. As shown in FIG. 10, the partition wall 318 is formed in the inflow side housing 31 so as to have the same height as the annular recess 317 in the bonding direction.

As shown in FIG. 10, the partition wall 318 is provided closer to the downstream end portion 331a1 of the first tubular portion than the first valve seat 332a. The partition wall 318 is provided closer to the downstream end portion 331b1 of the second tubular portion than the second valve seat 332b.

The partition joint portion 317b2 is a joint portion that integrally connects the top surface of the partition wall 318 and the portion of the plate-shaped portion 333 that the partition wall 318 contacts. The inflow side housing 31 includes an intersecting contact portion 319 which is a protruding wall that intersects the partition wall 318 so as to cross. As shown in FIGS. 12 to 14, the cross-contact portion 319 extends so as to project in the arrangement direction of the solenoid portions on both sides of the end portion of the partition wall 318 extending from one side to the other side. Unlike the partition wall 318, the cross contact portion 319 is in contact with the seat valve member 33 in a non-welded or unbonded state. That is, the cross contact portion 319 and the plate-shaped portion 333 are non-coupling portions that are only in contact with each other and are not fixed.

When the solenoid valve opens and closes in the purge valve 3, vibration propagates radially around the valve seat on which the valve body is seated. Along with this radial vibration propagation, a radial sound that expands radially can be generated. When only one of the two solenoid valves opens and closes, the vibration propagates radially from the valve seat on one side to generate a radiated sound. In this case, the vibration propagating from the valve seat on one side is prevented from being radially expanded by the partition coupling portion 317b2. In this way, the partition coupling portion 317b2 suppresses the vibration propagation from the valve seat on one side to the region on one side, and contributes to suppressing the vibration area. Further, the partition wall 318 and the partition joint portion 317b2 reinforce the seat valve member 33 between the first valve seat 332a and the second valve seat 332b to increase the rigidity. As a result, the partition wall 318 and the partition joint portion 317b2 prevent the seat valve member 33 from bending due to the vibration caused by the opening / closing operation of the valve body. By suppressing the bending of the seat valve member 33, it is possible to suppress the vibration of the purge valve 3 due to the opening / closing operation of the valve body.

Further, the cross contact portion 319 prevents the vibration that hits the partition wall 318 from propagating in the extending direction of the partition wall 318 and further propagating ahead of the partition wall 318. In this way, the intersecting contact portion 319 contributes to suppressing the expansion of vibration propagation through the partition wall 318. Further, since the intersecting contact portion 319 extends in the directions of both sides intersecting the partition wall 318, it also has an effect of inhibiting the vibration range that propagates radially around the valve seat.

The purge valve 3 is fixed to the vehicle side member by a fixing means such as a bolt via a plurality of attached portions. For example, a female screw portion to be screwed into a bolt is embedded in a vehicle side member. The purge valve 3 has a first attachment portion 34 that projects outward from the first side wall 311 of the inflow side housing 31. The first mounted portion 34 is provided with a mounting hole penetrating in the coupling direction in which the inflow side housing 31 and the outflow side housing 32 are overlapped with each other. The mounting hole of the first mounted portion 34 is a through hole for inserting a fixing means such as a bolt to be coupled to the vehicle side member. The first attached portion 34 is arranged at a position biased to one side in the inflow side housing 31. The first mounting portion 34 is arranged laterally in the inflow side housing 31 so as to be aligned with the first solenoid valve 37.

The purge valve 3 has a second attachment portion 35 that projects outward from the second side wall 312 of the inflow side housing 31. The second mounting portion 35 is provided with a mounting hole penetrating in the coupling direction in which the inflow side housing 31 and the outflow side housing 32 are overlapped with each other. The mounting hole of the second mounted portion 35 is a through hole for inserting a fixing means such as a bolt to be coupled to the vehicle side member. The second attached portion 35 is arranged at a position biased to one side in the arrangement direction of the solenoid portions in the inflow side housing 31. The second mounting portion 35 is arranged laterally in the inflow side housing 31 so as to be aligned with the second solenoid valve 38. The first mounted portion 34, the first solenoid portion, the second solenoid portion, and the second mounted portion 35 are arranged so as to overlap each other in the alignment direction of the first solenoid portion and the second solenoid portion.

The purge valve 3 has a third attachment portion 36 that projects outward from the third side wall 313 of the inflow side housing 31. The third attached portion 36 is located on one side of the inflow side housing 31, and is provided on the third side wall 313 adjacent to the first attached portion 34 and the second attached portion 35. The third mounting portion 36 is provided with a mounting hole that penetrates in the coupling direction in which the inflow side housing 31 and the outflow side housing 32 are overlapped with each other. The mounting hole of the third mounted portion 36 is a through hole for inserting a fixing means such as a bolt to be coupled to the vehicle side member.

The second solenoid valve 38 is configured so that the fluid flow rate flowing through the fully opened second internal passage 43b is the smallest among the plurality of solenoid valves. The first solenoid valve 37 is configured so that the flow rate of the fluid flowing through the fully opened first internal passage 43a is larger than that of the second solenoid valve 38. In the purge valve 3, the first solenoid valve 37 is a flow rate adjusting valve that provides a large flow rate performance, and the second solenoid valve 38 is a flow rate adjusting valve that provides a small flow rate performance. The first internal passage 43a has a passage crossing area larger than that of the second internal passage 43b.

The first internal passage 43a is formed so that the flow rate of the fluid that can flow down is larger than that of the second internal passage 43b. With this configuration, the vibration associated with the opening / closing operation of the first valve body 42a can be larger than the vibration associated with the opening / closing operation of the second valve body 42b. The purge valve 3 has a configuration in which the first mounted portion 34 and the second mounted portion 35 are lined up with the first solenoid portion in between, as a configuration capable of suppressing this vibration.

For example, when the supply flow rate to the engine 2 requires a small flow rate, the first solenoid valve 37 is in the closed state, and the second solenoid valve 38 is energized and controlled by the control device to be in the valve open state. When a small flow rate is required, the control device controls the ratio of the on-time to the total time of energization on and off, that is, the duty ratio, to energize the coil portion 410 of the second solenoid valve 38. When a small flow rate is requested, the duty energization control allows the small flow rate of evaporated fuel flowing through the second internal passage 43b to be supplied into the intake pipe 21 from the outflow port 32a.

When a shift is made from the time when a small flow rate is requested to the time when a large flow rate is required, the second solenoid valve 38 is always open, and the first solenoid valve 37 is duty-energized and is opened. When a large flow rate is requested, in addition to the small flow rate flowing through the second internal passage 43b in the fully open state, a large flow rate of evaporated fuel flowing through the first internal passage 43a is supplied into the intake pipe 21 from the outflow port 32a by duty energization control. Will be done. When a small flow rate is required, the valve opening rate of the second valve body 42b is increased and the supply flow rate is controlled to increase toward the time when a large flow rate is required. When a large flow rate is required, the valve opening rate of the first valve body 42a is increased from the supply flow rate when the second valve body 42b is always open, and the supply flow rate is controlled to increase. With such control, the flow rate increase rate when a large flow rate is requested becomes larger than the flow rate increase rate when a small flow rate is requested. The purge valve 3 is controlled so that the second solenoid valve 38, which provides the small flow rate performance, is opened first when the supply starts from the state where the supply flow rate to the engine 2 is zero.

The operation and effect brought about by the purge control valve device disclosed by the purge valve 3 of the first embodiment will be described. The purge control valve device includes a first internal passage 43a and a second internal passage 43b, which are a part of an internal passage connecting the inflow port 31a and the outflow port 32a. The purge control valve device displaces the first solenoid unit that generates an electromagnetic force that displaces the first valve body 42a that can open and close the first internal passage 43a and the second valve body 42b that can open and close the second internal passage 43b. It is provided with a second solenoid unit that generates an electromagnetic force to cause the displacement. The purge control valve device includes a solenoid housing in which both the first solenoid portion and the second solenoid portion are resin-molded and built in, and a seat valve member 33. The seat valve member 33 is made of resin in which the first valve seat 332a and the second valve seat 332b are integrally formed, and is bonded or bonded to the solenoid housing.

According to this device, a solenoid housing for resin-molding two solenoid valves and a seat valve member 33 in which two valve seats are integrally formed are provided. Further, since the seat valve member 33 and the solenoid housing are connected by welding or adhesion, it is possible to provide a purge control valve device capable of reducing the number of parts. Further, the purge control valve device can reduce the area of the joint portion by welding or adhesion as compared with the device including both the member having the first valve seat and the member having the second valve body.

The seat valve member 33 is a plate-shaped portion integrally formed with a first tubular portion 331a, a second tubular portion 331b, a first tubular portion 331a and a second tubular portion 331b protruding in the thickness direction. It includes 333. The seat valve member 33 and the solenoid housing have a peripheral coupling portion 317b1 that is welded or bonded. The peripheral coupling portion 317b1 is provided so as to surround the periphery of the first tubular portion 331a and the second tubular portion 331b.

According to this configuration, since the peripheral coupling portion 317b1 surrounds the circumferences of the first valve seat 332a and the second valve seat 332b in an annular shape, the vibration propagating radially through the plate-shaped portion 333 by the valve closing is suppressed. According to the peripheral coupling portion 317b1, it is possible to suppress the radiated sound that spreads around the first valve seat 332a and the second valve seat 332b.

The seat valve member 33 and the solenoid housing further have a partition coupling portion 317b2 that is welded or bonded. The partition joint portion 317b2 extends inward from the peripheral joint portion 317b1 so as to cross between the first tubular portion 331a and the second tubular portion 331b. According to this configuration, the partition coupling portion 317b2 can suppress the radiation vibration propagating from the first valve seat 332a side from expanding to the second valve seat 332b side. Further, the partition coupling portion 317b2 can suppress the radiation vibration propagating from the second valve seat 332b side from expanding to the first valve seat 332a side.

The partition coupling portion 317b2 is located closer to the downstream end portion 331a1 of the first tubular portion and closer to the downstream end portion 331b1 of the second tubular portion than the first valve seat and the second valve seat. According to this configuration, the first valve seat and the second valve seat, which are the starting points of vibration when the valve is closed, and the partition coupling portion 317b2 are separated from each other in the extending direction of the tubular portion. As a result, the propagation distance of the vibration from the first valve seat or the second valve seat to the partition coupling portion 317b2 can be increased, so that it is possible to contribute to suppressing the vibration until the vibration propagates to the partition coupling portion 317b2.

The partition joint portion 317b2 is formed at a contact portion between the partition wall 318 and the plate-shaped portion 333 that protrudes from the solenoid housing toward the plate-shaped portion 333. According to this configuration, the effect of absorbing the radiated vibration and the radiated sound propagating to the partition coupling portion 317b2 by the protruding height dimension of the partition wall 318 is obtained.

The solenoid housing further includes an intersecting contact portion 319 that is a protrusion that intersects the partition coupling portion 317b2 so as to cross. The cross contact portion 319 is in contact with the seat valve member 33 in a non-welded or unbonded state. According to this configuration, the vibration or the like propagated to the partition coupling portion 317b2 can be absorbed by the cross contact portion 319. As a result, it is possible to provide the purge valve 3 that suppresses the vibration or the like from further spreading to the surroundings via the partition coupling portion 317b2.

The first solenoid portion and the second solenoid portion are arranged side by side unevenly on one side of the solenoid housing and are resin-molded. According to this configuration, the radial vibration easily reaches one side of the outer peripheral edge of the seat valve member 33 quickly and reaches the other side late. Since the peripheral coupling portion 317b1 surrounds the first valve seat 332a and the second valve seat 332b in an annular shape, it contributes to stably reducing the radial vibration unbalanced in the circumferential direction.

The first internal passage 43a is a passage formed with a passage crossing area larger than that of the second internal passage 43b. According to this configuration, the first solenoid valve 37 is a solenoid valve capable of controlling a fluid having a larger flow rate than the second solenoid valve 38. The seat valve member 33 is a member integrally having a first valve seat on which the solenoid valve for controlling the large flow rate is seated and a second valve seat on which the solenoid valve for controlling the small flow rate is seated. The seat valve member 33 integrally includes two valve seats having different radiant vibrations and radiated sounds that propagate radially. Therefore, in the purge valve 3 in which the vibration and sound propagating through the seat valve member 33 are imbalanced, it is possible to provide the purge valve 3 capable of effectively suppressing the radiated sound and the like. Further, it is possible to provide a purge valve 3 that contributes to suppressing the larger radiated vibration and radiated sound propagating through the seat valve member 33.

(Other embodiments)
Disclosure of this specification is not limited to the illustrated embodiments. The disclosure includes exemplary embodiments and modifications by those skilled in the art based on them. For example, the disclosure is not limited to the combination of parts and elements shown in the embodiment, and can be implemented in various modifications. Disclosure can be carried out in various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure includes parts and elements of the embodiment omitted. Disclosures include replacements or combinations of parts, elements between one embodiment and another. The technical scope disclosed is not limited to the description of the embodiments. The technical scope disclosed is indicated by the description of the scope of claims, and should be understood to include all modifications within the meaning and scope equivalent to the description of the scope of claims.

The purge control valve device capable of achieving the object disclosed in the specification is not limited to the configuration described with reference to the drawings in the above-described embodiment. The purge valve in the above-described embodiment is shown so that the inflow port 31a is located below the outflow port 32a. The positional relationship between the inflow port 31a and the outflow port 32a is not limited to this form. The inflow port 31a may be configured to be located above the outflow port 32a, or the inflow port 31a and the outflow port 32a may be arranged side by side. Further, the positional relationship between the inflow port 31a and the first internal passage 43a and the second internal passage 43b may also be arranged in the vertical direction.

2 ... Engine, 13 ... Canister 31 ... Inflow side housing (solenoid housing), 31a ... Inflow port 32a ... Outflow port, 33 ... Seat valve member 37 ... 1st solenoid valve (1st solenoid part), 38 ... 2nd solenoid valve (2nd solenoid part)
42a ... 1st valve body, 42b ... 2nd valve body, 43a ... 1st internal passage 43b ... 2nd internal passage, 332a ... 1st valve seat, 332b ... 2nd valve seat

Claims (8)

The inflow port (31a) into which the evaporated fuel spilled from the canister (13) flows in, and
The outflow port (32a) through which the evaporated fuel flows out toward the engine (2),
The first internal passage (43a) and the second internal passage (43b), which are a part of the internal passage connecting the inflow port and the outflow port,
A first solenoid unit (37) that generates an electromagnetic force that displaces a first valve body (42a) that can open and close the first internal passage.
A second solenoid unit (38) that generates an electromagnetic force that displaces a second valve body (42b) that can open and close the second internal passage.
A solenoid housing (31) in which both the first solenoid portion and the second solenoid portion are resin-molded and incorporated.
The first valve seat (332a) on which the first valve body is seated and the second valve seat (332b) on which the second valve body is seated are integrally formed, and are bonded or bonded to the solenoid housing. Resin seat valve member (33) and
Purge control valve device equipped with. The seat valve member has a first tubular portion (331a) provided with the first valve seat at an end and having the first internal passage inside, and the second valve seat provided with the second valve seat at the end. A second tubular portion (331b) having an internal passage inside, and a plate-shaped portion (333) integrally formed with the first tubular portion and the second tubular portion protruding in the thickness direction. Prepare,
The purge according to claim 1, wherein the seat valve member and the solenoid housing surround the first tubular portion and the second tubular portion, and have a peripheral coupling portion (317b1) bonded by welding or adhesion. Control valve device. The seat valve member and the solenoid housing extend inward from the peripheral coupling portion so as to cross between the first tubular portion and the second tubular portion, and are joined by welding or adhesion. The purge control valve device according to claim 2, further comprising a partition joint (317b2). The partition coupling portion is closer to the downstream end portion (331a1) of the first tubular portion and closer to the downstream end portion (331b1) of the second tubular portion than the first valve seat and the second valve seat. The purge control valve device according to claim 3, which is located in. The purge control valve device according to claim 4, wherein the partition coupling portion is formed at a contact portion between the partition wall (318) protruding from the solenoid housing toward the plate-shaped portion and the plate-shaped portion. The solenoid housing is a projecting portion that intersects the partition joint portion so as to cross the partition joint portion, and the cross contact portion (319) that contacts the seat valve member in a non-welded state without being welded or adhered. The purge control valve device according to any one of claims 3 to 5, further comprising. The purge control according to any one of claims 2 to 6, wherein the first solenoid portion and the second solenoid portion are arranged side by side unevenly on one side of the solenoid housing and are resin-molded. Valve device. The purge control valve device according to any one of claims 1 to 7, wherein the first internal passage is a passage formed with a passage crossing area larger than that of the second internal passage.

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