JP6653611B2 - Purge solenoid valve - Google Patents

Description

  The present invention relates to a purge solenoid valve used in a purge system of a supercharged engine.

  In order to prevent air pollution, evaporated gas generated in the gasoline tank of the vehicle is separated into gasoline and air by the canister, and only air is released to the atmosphere. Gasoline adsorbed on the activated carbon in the canister is sucked by the negative pressure generated in the intake manifold, introduced into the engine and burned. At this time, a purge solenoid valve installed in a purge pipe connecting the canister and the intake manifold controls a flow rate of the vaporized gas introduced from the canister to the engine.

  In recent years, vehicles equipped with a supercharged engine are increasing with downsizing of the engine. At the time of supercharging, the pressure downstream of the compressor becomes positive, and it is difficult to process the vaporized gas using the negative pressure of the intake manifold. Therefore, it is necessary to process the vaporized gas using the negative pressure generated upstream of the compressor. Therefore, for example, in the purge system described in Patent Document 1, two systems of a first purge pipe connecting the canister and the downstream of the compressor and a second purge pipe connecting the canister and the upstream of the compressor are provided. A purge solenoid valve is installed.

JP-A-11-287162

  Conventional purge systems for turbocharged engines require an additional purge line and purge solenoid valve connecting the canister and the upstream of the compressor in addition to the purge line and purge solenoid valve connecting the canister and the downstream of the compressor. However, there is a problem that the piping is complicated. When the piping is complicated, the number of parts increases and the cost increases. Also, it is difficult to secure an installation place in a narrow engine room.

  The present invention has been made to solve the above-described problem, and has as its object to simplify piping in a purge system of a supercharged engine.

The purge solenoid valve according to the present invention, an introduction port for introducing the vaporized gas from the canister, a first derived port for guiding the vaporized gas introduced to the introduction port to a downstream portion of the compressor of the intake pipe of the supercharged engine, A second outlet port for guiding the vaporized gas introduced to the inlet port to the upstream portion of the compressor of the intake pipe, a fluid passage branching from the inlet port to the first outlet port and the second outlet port, and a branch to the first outlet port. a first valve body that opens and closes a fluid passage after, a second valve body that opens and closes a fluid passage after branched to the second outlet port, a first for generating an electromagnetic force for driving the first valve body a solenoid portion includes a second solenoid unit for generating an electromagnetic force for driving the second valve body, a control unit for individually duty control the first solenoid portion and a second solenoid unit, the control unit, the supercharger If the compressor is stopped, and drives the first solenoid portion both of the second solenoid unit.

  According to the present invention, the purge solenoid valve, which has conventionally been divided into two systems, can be integrated to provide a branch of the purge pipe in the purge solenoid valve. Thereby, the piping in the purge system of the supercharged engine can be simplified.

FIG. 1 is a diagram showing a configuration example of a purge system of a supercharged engine using a purge solenoid valve according to Embodiment 1 of the present invention. FIG. 2 is a diagram illustrating a configuration example of a purge system of a supercharged engine when a branch pipe is used, as a reference example for helping understanding of the first embodiment. FIG. 3 is a cross-sectional view illustrating a configuration example of a purge solenoid valve of a positive suction specification used in the purge system of FIG. 2. FIG. 8 is a diagram illustrating a configuration example of a purge system of a supercharged engine using a purge solenoid valve according to a second embodiment of the present invention. FIG. 9 is a diagram illustrating a configuration example of a purge system of a supercharged engine using a purge solenoid valve according to Embodiment 3 of the present invention. FIG. 14 is a diagram illustrating an example of a method of controlling a purge solenoid valve according to Embodiment 4 of the present invention.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration example of a purge system of a supercharged engine 54 using a purge solenoid valve 1 according to Embodiment 1 of the present invention. FIG. 1 is a sectional view of the purge solenoid valve 1. The purge solenoid valve 1 according to the first embodiment includes an inlet port 2 for introducing a vaporized gas from a canister (not shown) and a first outlet port for guiding the vaporized gas introduced to the inlet port 2 to a compressor downstream portion 55 of the intake pipe 51. 3, a second outlet port 4 for guiding the vaporized gas introduced to the inlet port 2 to the compressor upstream portion 56 of the intake pipe 51, and a fluid branched from the inlet port 2 to the first outlet port 3 and the second outlet port 4. And a passage 5. In the example of FIG. 1, the fluid passage 5 is configured to branch off in a chamber 5a of a large capacity space.

  A hose 21 is attached to the introduction port 2 and is prevented from coming off by a clamp 22. The vaporized gas adsorbed on the activated carbon of the canister is introduced from the canister to the introduction port 2 through the hose 21.

  A hose 31 serving as a first purge path 30 is attached to the first outlet port 3, and is prevented from coming off by a clamp 32. The end of the hose 31 is attached to a compressor downstream portion 55 of the intake pipe 51 downstream of the compressor 52, and is prevented from coming off by a clamp 33. The vaporized gas introduced into the introduction port 2 is branched from the fluid passage 5 to the first outlet port 3, flows through the hose 31, and is led out to the intake pipe 51.

  A hose 41 serving as a second purge path 40 is attached to the second outlet port 4, and is prevented from coming off by a clamp 42. The tip of the hose 41 is attached to a compressor upstream portion 56 of the intake pipe 51 upstream of the compressor 52, and is prevented from coming off by a clamp 43. The vaporized gas introduced into the introduction port 2 branches from the fluid passage 5 to the second extraction port 4, flows through the hose 41, and is extracted to the intake pipe 51.

  The purge solenoid valve 1 includes a first valve body 6 that opens and closes a fluid passage 5 after branching from the inlet port 2 to the first outlet port 3 and a fluid that branches off from the inlet port 2 to the second outlet port 4. A second valve body 7 for opening and closing the passage 5, a first solenoid unit 8 for generating an electromagnetic force for driving the first valve body 6, and a second solenoid unit 9 for generating an electromagnetic force for driving the second valve body 7 And A first valve seat 12 is provided in the fluid passage 5 after branching from the inlet port 2 to the first outlet port 3, and the fluid passage 5 after branching from the inlet port 2 to the second outlet port 4 is connected to the first valve seat 12. Is provided with a second valve seat 13.

  The duty of the first solenoid unit 8 and the second solenoid unit 9 is individually controlled by the control unit 60. The control unit 60 determines each duty ratio of the first solenoid unit 8 and the second solenoid unit 9 according to the state of the engine 54 and the like, and outputs a pulse signal corresponding to each duty ratio to the first solenoid unit of the purge solenoid valve 1. 8 and to the second solenoid unit 9. The control unit 60 is, for example, an engine control unit (ECU).

  When the pulse signal to the first solenoid unit 8 is turned on, an electric current flows through the coil of the first solenoid unit 8 to generate an electromagnetic force in the core, and the first valve body 6 is attracted to the electromagnetic force, and from the first valve seat 12. And the valve is opened. When the pulse signal to the first solenoid unit 8 is turned off, the first valve body 6 comes into contact with the first valve seat 12 by the urging force of the first spring 10, and the valve is closed. As the duty ratio of the pulse signal increases, the opening time of the first valve element 6 increases, and the amount of vaporized gas flowing from the introduction port 2 to the first extraction port 3 increases.

  When the pulse signal to the second solenoid unit 9 is turned on, a current flows through the coil of the second solenoid unit 9 to generate an electromagnetic force in the core, and the second valve body 7 is attracted to the electromagnetic force, and from the second valve seat 13. And the valve is opened. When the pulse signal to the second solenoid portion 9 is turned off, the second valve body 7 comes into contact with the second valve seat 13 by the urging force of the second spring 11, and the valve is closed. As the duty ratio of the pulse signal increases, the opening time of the second valve element 7 increases, and the amount of vaporized gas flowing from the introduction port 2 to the second extraction port 4 increases.

Next, an operation example of the purge solenoid valve 1 in the purge system of FIG. 1 will be described. In a vehicle equipped with a supercharged engine 54, air from an air cleaner 50 is introduced into an intake pipe 51, passes through a throttle valve 53, and is led out of the intake manifold to the engine 54. When the compressor 52 of the supercharger is operating, the air introduced into the intake pipe 51 is compressed by the compressor 52 and led to the engine 54.
The evaporated gas generated in the gasoline tank is adsorbed on the activated carbon of the canister. The clean air from which the evaporated gas components have been removed by the canister is discharged to the atmosphere from the air opening of the canister. The vaporized gas component accumulated in the canister is introduced into the purge solenoid valve 1 through the hose 21, flows from the purge solenoid valve 1 through the first purge path 30 or the second purge path 40 to the intake pipe 51, and is burned by the engine 54. Is done.

  At the time of non-supercharging in which the compressor 52 is not operating, a negative pressure is generated in the compressor downstream portion 55. At this time, the control unit 60 generates a pulse signal having a duty ratio larger than 0, outputs the generated pulse signal to the first solenoid unit 8, and drives the first solenoid unit 8 to turn on and off. As a result, the first valve element 6 repeatedly opens and closes the first purge path 30, and the evaporated gas is introduced from the canister into the compressor downstream portion 55 and is burned by the engine 54. On the other hand, the control unit 60 outputs a pulse signal having a duty ratio of 0 to the second solenoid unit 9, does not drive the second solenoid unit 9, and maintains the second valve body 7 in a closed state.

  At the time of supercharging when the compressor 52 is operating, the downstream pressure of the compressor 55 becomes a positive pressure. Therefore, it is difficult to suck the vaporized gas using the negative pressure of the downstream compressor 55 as in the case of non-supercharging. Therefore, at the time of supercharging, the vaporized gas in the canister is sucked by using the negative pressure generated in the compressor upstream section 56. At this time, the control unit 60 generates a pulse signal having a duty ratio larger than 0 and outputs the pulse signal to the second solenoid unit 9 to drive the second solenoid unit 9 on and off. As a result, the second valve element 7 repeatedly opens and closes the second purge path 40, and the vaporized gas is introduced from the canister into the compressor upstream section 56 and burned by the engine 54. On the other hand, the control unit 60 outputs a pulse signal having a duty ratio of 0 to the first solenoid unit 8, does not drive the first solenoid unit 8, and maintains the first valve body 6 in the closed state.

Next, the reverse suction specification of the purge solenoid valve 1 will be described.
The first valve body 6 shown in FIG. 1 is of a reverse suction type. The pressure difference between the front and rear of the first valve body 6 during non-supercharging, that is, the difference between the pressure on the introduction port 2 side communicating with the canister and the pressure on the first outlet port 3 side communicating with the compressor downstream portion 55 is the first difference. The structure that works in the direction to open the valve body 6 is called a reverse suction specification. On the other hand, at the time of supercharging, the pressure on the compressor downstream portion 55 side becomes higher than the pressure on the canister side, so that the first valve body 6 of the reverse suction type is closed by the pressure difference. Therefore, it is possible to prevent the vaporized gas from flowing backward from the compressor downstream portion 55 to the canister.

  Further, in FIG. 1, since the second valve element 7 is also of the reverse suction type, the pressure difference before and after the second valve element 7, that is, the canister The difference between the pressure on the introduction port 2 side communicating with the compressor and the pressure on the second outlet port 4 side communicating with the compressor upstream portion 56 acts in a direction to open the second valve body 7. On the other hand, if the pressure on the compressor upstream portion 56 side becomes higher than the pressure on the canister side, the second valve body 7 of the reverse suction specification closes due to the differential pressure, thereby preventing the vaporized gas from flowing back from the compressor upstream portion 56 to the canister. it can.

  Here, FIG. 2 schematically shows a purge system of the supercharged engine 54 when the branch pipe 120 is used, as a reference example for helping to understand the first embodiment. In the reference example shown in FIG. 2, a hose 121 extending from a canister is attached to a branch pipe 120 and is prevented from coming off by a clamp 122. The branch pipe 120 branches the vaporized gas purge path into a first purge path 130 and a second purge path 140.

  The first purge passage 130 is provided with a first purge solenoid valve 100 for controlling the flow rate of the first purge passage 130 and a first check valve 131 for preventing backflow. The branch pipe 120 and the first purge solenoid valve 100 are connected by a hose 123, and the hose 123 is prevented from coming off by clamps 124 and 125. The first purge solenoid valve 100 and the first check valve 131 are connected by a hose 132, and the hose 132 is stopped by clamps 133 and 134. The first check valve 131 and the compressor downstream portion 55 are connected by a hose 135, and the hose 135 is prevented from coming off by clamps 136 and 137.

  The second purge path 140 is provided with a second purge solenoid valve 110 for controlling the flow rate of the second purge path 140 and a second check valve 141 for preventing backflow. The branch pipe 120 and the second purge solenoid valve 110 are connected by a hose 126, and the hose 126 is prevented from coming off by clamps 127 and 128. The hose 142 connects between the second purge solenoid valve 110 and the second check valve 141, and the hose 142 is prevented from coming off by the clamps 143 and 144. The second check valve 141 and the compressor upstream portion 56 are connected by a hose 145, and the hose 145 is prevented from coming off by clamps 146 and 147.

  In the reference example shown in FIG. 2, when the compressor 52 is not operating and the supercharge is not performed, the first purge solenoid valve 100 is opened, and the vaporized gas is sucked from the canister into the compressor downstream portion 55 via the first purge passage 130. You. At the time of supercharging while the compressor 52 is operating, the second purge solenoid valve 110 is opened, and the vaporized gas is sucked from the canister to the compressor upstream section 56 via the second purge path 140.

  Here, FIG. 3 shows a cross-sectional view of the first purge solenoid valve 100 of the normal suction specification. The first purge solenoid valve 100 includes an inlet port 101 to which a hose 123 is connected, an outlet port 102 to which a hose 132 is connected, a fluid passage 103 connecting the inlet port 101 and the outlet port 102, and a fluid passage 103. A valve body 104 that opens and closes and a solenoid unit 105 that generates an electromagnetic force for driving the valve body 104 are provided. When the solenoid portion 105 is driven, an electromagnetic force is generated, and the valve body 104 is attracted by the electromagnetic force, separates from the valve seat 107, and is opened. When the solenoid 105 is not driven, the valve body 104 comes into contact with the valve seat 107 by the urging force of the spring 106, and the valve is closed.

  In the first purge solenoid valve 100 of the positive suction specification, when the pressure of the outlet port 102 connected to the compressor downstream portion 55 becomes higher than the pressure of the introduction port 101 connected to the canister, the differential pressure increases. Work to open 104. Therefore, in order to prevent the vaporized gas from flowing backward from the compressor downstream portion 55 to the canister, the first check valve 131 is required.

  Although not shown, the second purge solenoid valve 110 is also of a normal suction type similarly to the first purge solenoid valve 100. When the first purge solenoid valve 100 shown in FIG. 3 is used as the second purge solenoid valve 110, the hose 126 is connected to the introduction port 101, and the hose 142 is connected to the outlet port 102. When the pressure in the compressor upstream section 56 becomes higher than the pressure in the canister, the pressure difference acts in a direction to open the second purge solenoid valve 110. Therefore, the second check valve 141 is required to prevent the vaporized gas from flowing backward from the compressor upstream section 56 to the canister.

The purge system of the reference example shown in FIG. 2 requires two purge solenoid valves, one branch pipe, two check valves, seven hoses, and thirteen clamps, and a total of 25 parts are required.
On the other hand, in the purge system according to the first embodiment shown in FIG. 1, the purge solenoid valve is integrated, and the branch of the purge path is provided in the purge solenoid valve 1, thereby eliminating the need for a branch pipe. In addition, by making the purge solenoid valve 1 a reverse suction type, a check valve becomes unnecessary. Therefore, a purge system can be configured with a total of nine parts including one purge solenoid valve, three hoses, and five clamps.

  As described above, the purge solenoid valve 1 according to the first embodiment includes the inlet port 2 for introducing the vaporized gas from the canister and the compressor of the intake pipe 51 of the engine 54 with the turbocharger. A first outlet port 3 for leading to the downstream portion 55, a second outlet port 4 for leading the vaporized gas introduced to the inlet port 2 to the compressor upstream portion 56 of the intake pipe 51, and a first outlet port 3 from the inlet port 2. A fluid passage 5 branching to the second outlet port 4, a first valve body 6 opening and closing the fluid passage 5 branched to the first outlet port 3, and a fluid passage 5 branching to the second outlet port 4 , A first solenoid 8 that generates an electromagnetic force for driving the first valve 6, and a second solenoid 9 that generates an electromagnetic force for driving the second valve 7. It is a configuration provided. With this configuration, the pipes forming the first purge path 30 and the second purge path 40 branching from the canister into two systems can be simplified. As a result, the omission of branch pipes, the improvement of mounting workability by reducing parts such as clamps, cost reduction, and space saving can be achieved.

Further, in the purge solenoid valve 1 according to the first embodiment, a reverse suction type in which a differential pressure when the pressure on the compressor downstream portion 55 side is higher than the pressure on the canister side acts in a direction to close the first valve body 6. Thus, there is no need to install a check valve in the first purge path 30.
Similarly, the differential pressure when the pressure on the compressor upstream section 56 side is higher than the pressure on the canister side acts in the direction of closing the second valve body 7 so that the second purge path 40 is non-returned. There is no need to install a valve.

In FIG. 1, the diameter of the fluid passage 5 and the diameter of the first outlet port 3 after branching from the inlet port 2 to the first outlet port 3, and the fluid after branching from the inlet port 2 to the second outlet port 4. The diameter of the passage 5 and the diameter of the second outlet port 4 are the same, but may be different.
In a general purge system of the supercharged engine 54, the negative pressure generated in the compressor upstream portion 56 is lower than the negative pressure generated in the compressor downstream portion 55. The flow through 40 is low. Thus, for example, the diameter of the fluid passage 5 after branching from the inlet port 2 to the first outlet port 3 and the diameter of the first outlet port 3 are smaller than the diameter of the fluid passage 5 after branching from the inlet port 2 to the second outlet port 4. By increasing the diameter of the second outlet port 4 and the diameter of the second outlet port 4, it is possible to increase the flow rate of the second purge path 40 leading from the canister to the compressor upstream section 56.

  Further, when the diameter of the fluid passage 5 after branching from the introduction port 2 to the second outlet port 4 is increased, the second valve body 7 is also increased in size, so that the enlarged second valve body 7 can be driven. Therefore, it is desirable that the second solenoid section 9 is also enlarged. This makes it possible to combine the flow rates of the first purge path 30 and the second purge path 40 with a large flow rate and a small flow rate. , The flow rate can be controlled with high precision.

  In FIG. 1, the hoses 31 and 41 are held by the clamps 33 and 43 so that the hoses 31 and 41 do not come off due to the positive pressure at the time of supercharging. Hard to fall out. Therefore, the clamp 43 for holding the hose 41 can be omitted.

Embodiment 2 FIG.
FIG. 4 is a diagram showing a configuration example of a purge system of a supercharged engine 54 using a purge solenoid valve 1a according to Embodiment 2 of the present invention. FIG. 4 shows an external view of the purge solenoid valve 1a. The purge solenoid valve 1a according to the second embodiment has a configuration in which the first outlet port 3 is directly attached to the compressor downstream portion 55 of the intake pipe 51. In the illustrated example, the first outlet port 3 with the O-ring 34 attached to the outer peripheral surface is inserted into the opening of the compressor downstream portion 55 in the direction of arrow A, so that the first outlet port 3 is connected to the compressor downstream portion. 55 attached. Further, since the compressor upstream section 56 has a negative pressure even during supercharging, the clamp 43 is unnecessary. The other configuration is the same as the configuration shown in FIG. 1 in the first embodiment, and thus the description is omitted.

  As described above, in the purge solenoid valve 1a according to the second embodiment, the first outlet port 3 is directly attached to the compressor downstream portion 55 without using the hose 31, thereby simplifying the piping compared to the first embodiment. Can be

Embodiment 3 FIG.
FIG. 5 is a diagram showing a configuration example of a purge system of a supercharged engine 54 using a purge solenoid valve 1b according to Embodiment 3 of the present invention. FIG. 5 shows an external view of the purge solenoid valve 1b. The purge solenoid valve 1b according to the third embodiment has a configuration in which the second outlet port 4 is directly attached to the compressor upstream portion 56 of the intake pipe 51. In the illustrated example, the second outlet port 4 in a state where the O-ring 44 is attached to the outer peripheral surface is inserted into the opening of the compressor upstream portion 56 in the direction of arrow B, so that the second outlet port 4 is connected to the compressor upstream portion. Attached to 56. The other configuration is the same as the configuration shown in FIG. 1 in the first embodiment, and thus the description is omitted.

  As described above, in the purge solenoid valve 1b according to the third embodiment, the second outlet port 4 is directly attached to the compressor upstream portion 56 without using the hose 41, thereby simplifying the piping compared to the first embodiment. Can be

Embodiment 4 FIG.
In the fourth embodiment, a method of controlling the purge solenoid valve 1 by the control unit 60 will be described. Hereinafter, Embodiment 4 will be described with reference to FIG.
In the first embodiment, at the time of non-supercharging in which the compressor 52 is stopped, the control unit 60 stops driving the second solenoid unit 9 to close the second valve body 7, and sets the first solenoid unit 8 Is turned on and off to repeatedly open and close the first valve body 6, thereby evaporating gas at a flow rate corresponding to the opening time of the first valve body 6 from the canister to the compressor downstream portion 55. On the other hand, in the fourth embodiment, at the time of non-supercharging, the control unit 60 drives both the first solenoid unit 8 and the second solenoid unit 9 on and off to control the first valve body 6 and the second valve body 7. Repeat both opening and closing. At that time, the vaporized gas of the canister is sucked into the chamber 5a from the introduction port 2 by the negative pressure of the compressor downstream portion 55, and the atmosphere of the compressor upstream portion 56 is sucked from the second outlet port 4 to the chamber 5a. At, the vaporized gas and the atmosphere are mixed. Therefore, it is possible to reduce the concentration of the vaporized gas led out from the first purge passage 30 to the engine 54, which leads to stable control of the air-fuel ratio.

  Further, the control unit 60 can reduce the pressure pulsation by shifting the timing at which the first solenoid unit 8 and the second solenoid unit 9 are turned on and off when the supercharging is not performed. An example of this control method will be described with reference to FIG.

  In FIG. 6, the top waveform is a pulse signal output from the control unit 60 to the first solenoid unit 8. The second waveform from the top is the pressure at the introduction port 2 when the first valve 6 is opened and closed by this pulse signal. The third waveform from the top is a pulse signal output from the control unit 60 to the second solenoid unit 9. The fourth waveform from the top is the pressure at the second outlet port 4 when the second valve 7 is opened and closed by this pulse signal. The fifth waveform from the top is the pressure at the first outlet port 3 after the pressure at the inlet port 2 and the pressure at the second outlet port 4 are mixed in the chamber 5a.

  As shown in FIG. 6, at the time of non-supercharging, pressure pulsation occurs in the vaporized gas introduced from the introduction port 2 by repeating opening and closing of the first valve body 6 by repeating on / off driving of the first solenoid unit 8. Thus, the control unit 60 repeats the opening and closing of the second valve body 7 by repeating the on / off driving of the second solenoid unit 9, so that the atmosphere introduced from the second outlet port 4 has a phase opposite to the pressure pulsation of the vaporized gas. A pressure pulsation is generated, and the pressure pulsation of the evaporated gas and the pressure pulsation of the atmosphere are offset in the chamber 5a. Thereby, the pulsation of the vaporized gas led out from the first lead-out port 3 to the engine at the time of non-supercharging is canceled, and the pressure becomes stable.

  Note that there is a response delay C between the ON / OFF drive timing of the first solenoid unit 8 and the pressure pulsation generated in the introduction port 2. Similarly, there is a response delay D between the ON / OFF drive timing of the second solenoid unit 9 and the pressure pulsation generated in the second outlet port 4. Therefore, the control unit 60 converts the pulse signal whose phase is shifted by the drive timing shift F in consideration of the response delay correction E based on the response delays C and D with respect to the pulse signal of the first solenoid unit 8 into the second signal. The pulse signal of the solenoid unit 9 is used. Since the response delays C and D change according to the duty ratio, the drive timing deviation F corresponding to the duty ratio is set in the control unit 60 in advance. The control unit 60 determines the duty ratio of the first solenoid unit 8 and the second solenoid unit 9 according to the state of the engine 54 and the like, and determines the pulse of the first solenoid unit 8 by the drive timing shift F corresponding to the duty ratio. The pulse signal of the second solenoid unit 9 is shifted with respect to the signal.

  As described above, the control unit 60 in the purge solenoid valve 1 according to the fourth embodiment drives both the first solenoid unit 8 and the second solenoid unit 9 when the compressor 52 is stopped and not in supercharging. Therefore, the concentration of the vaporized gas led to the downstream portion 55 of the compressor can be controlled.

  Further, according to the fourth embodiment, when the compressor 52 is stopped and the compressor 52 is stopped, the control unit 60 outputs pulse signals having different phases to the first solenoid unit 8 and the second solenoid unit 9 for driving. Is shifted, it is possible to cancel the pressure pulsation of the vaporized gas led to the compressor downstream portion 55.

  In the present invention, within the scope of the invention, any combination of the embodiments, any modification of any component of each embodiment, or omission of any component of each embodiment is possible.

  1, 1a, 1b purge solenoid valve, 2 inlet port, 3 first outlet port, 4 second outlet port, 5 fluid passage, 5a chamber, 6 first valve body, 7 second valve body, 8 first solenoid unit, 9 second solenoid part, 10 first spring, 11 second spring, 12 first valve seat, 13 second valve seat, 21, 31, 41, hose, 22, 32, 33, 42, 43 clamp, 30 first purge Path, 34, 44 O-ring, 40 Second purge path, 50 Air cleaner, 51 Intake pipe, 52 Compressor, 53 Throttle valve, 54 Engine, 55 Compressor downstream, 56 Compressor upstream, 60 Control, 100 First purge solenoid Valve, 110 Second purge solenoid valve, 120 Branch pipe, 121, 123, 126, 13 , 135, 142, 145 hose, 122, 124, 125, 127, 128, 133, 134, 136, 137, 143, 144, 146, 157 clamp, 130 first purge path, 131 first check valve, 140 Two purge paths, 141 second check valve.

Claims (7)

An introduction port for introducing vaporized gas from the canister,
A first outlet port for introducing the vaporized gas introduced to the inlet port to a compressor downstream portion of an intake pipe of a supercharged engine,
A second outlet port for introducing the vaporized gas introduced into the inlet port to a compressor upstream portion of the intake pipe,
A fluid passage branching from the introduction port to the first outlet port and the second outlet port,
A first valve body that opens and closes the fluid passage after branching to the first outlet port,
A second valve body that opens and closes the fluid passage after branching to the second outlet port,
A first solenoid unit that generates an electromagnetic force for driving the first valve body,
A second solenoid unit that generates an electromagnetic force for driving the second valve body,
A control unit that individually controls the duty of the first solenoid unit and the second solenoid unit,
A purge solenoid valve, wherein the control unit drives both the first solenoid unit and the second solenoid unit when the compressor of the supercharger is stopped. When the compressor of the supercharger is stopped, the control unit outputs pulse signals having different phases to the first solenoid unit and the second solenoid unit to shift the drive timing. The purge solenoid valve according to claim 1 . Compared to the diameter of the fluid passage and the diameter of the first outlet port after branching from the introduction port to the first outlet port, the diameter of the fluid passage after branching from the inlet port to the second outlet port and the 3. The purge solenoid valve according to claim 1, wherein the diameter of the second outlet port is increased. Differential pressure is high pressure in the the pressure compressor downstream side of the canister side, any of claims 1 to 3, characterized in that acting in a direction to close the first valve body 1 The purge solenoid valve according to the item. Differential pressure when said pressure in the canister the more pressure compressor upstream side is high, any of claims 1 to 4, characterized in that acting on the second valve direction of closing the body 1 The purge solenoid valve according to the item. The purge solenoid valve according to any one of claims 1 to 5 , wherein the first outlet port is directly attached to the downstream portion of the compressor. The purge solenoid valve according to any one of claims 1 to 5 , wherein the second outlet port is directly attached to the upstream portion of the compressor.

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