JP2019127885A - Throttle valve device and flow control device - Google Patents

Abstract

To provide a throttle valve device capable of restricting circulation resistance under a low negative pressure and reducing noise and the like accompanied with pressure variation under a high load state and provide a flow control device including the throttle valve device.SOLUTION: A throttle valve device 16 comprises a negative pressure detecting passage 164a, a film body 162 and a throttle valve part 161. A negative pressure detecting passage 164a is arranged to communicate with an engine side passage 156a positioned near an engine rather than a valve port of a purge valve. The film body 162 is installed at a location communicating with the negative pressure detecting passage 164a and operated by pressure at the engine side passage 156a. The throttle valve part 161 is arranged at a flow-in side passage 154a positioned at a canister side rather than the valve port. The throttle valve part 161 is displaced in response to an operation of the film body 162 in the case that a valve body 152 is kept at its closed state and the film body 162 shows a negative pressure at the engine side passage 156a rather than the installing location to cause a flow passage cross sectional area at the flow-in side passage 154a to be narrowed.SELECTED DRAWING: Figure 3

Description

  The disclosure in this specification relates to a throttling valve device that controls the flow rate of evaporated fuel and a flow control device including the same.

  Patent Document 1 discloses a purge valve which is a solenoid valve capable of adjusting the flow rate of evaporated fuel flowing from a canister side to an intake pipe side of an engine.

JP, 2008-291916, A

  When the pressure fluctuation between the purge valve and the canister becomes large, the amplitude of the pipe, the canister, etc. connected to the purge valve becomes large, and the vibrations, sounds and the like transmitted to the vehicle interior through these become large. Therefore, the purge valve described in Patent Document 1 reduces the pulsation that enters the input port when the pressure wave from the chamber of the apparatus toward the input port is blocked by the column member having a large CD value in the counterflow direction when the valve is closed. It has a function.

  According to this prior art, the pillar member has a shape in which the CD value is small in the forward flow direction of the fluid from the inflow port to the valve port, but it is an obstacle that becomes resistance at low negative pressure when fluid flows to the engine side Therefore, there is a problem that the flow rate decreases when the engine negative pressure is high.

  An object of the disclosure in this specification is to provide a throttle valve device capable of suppressing flow resistance at low negative pressure and reducing noise and the like at the time of high negative pressure, and a flow control device including the same. .

  A plurality of aspects disclosed in this specification adopt different technical means to achieve each purpose. Further, the claims and the reference numerals in the parentheses described in this section are an example showing the correspondence with the specific means described in the embodiment described later as one aspect, and the technical scope is limited. is not.

One of the disclosed throttle valve devices is provided on the canister side rather than the purge valve (1015) that regulates the flow rate of evaporated fuel flowing out of the canister (13) and flowing toward the engine by the intake pressure of the engine (2) A throttle valve device (16; 1016; 2016),
A negative pressure sensing passage (164a) provided in communication with the engine side passage (156a; 157a; 167a) located closer to the engine than the valve port (153) at which the valve body (152) of the purge valve opens and closes;
A negative pressure sensing section (162; 165) which is provided in the negative pressure sensing passage or in a portion communicating with the negative pressure sensing passage and operates according to the pressure of the engine side passage;
It is provided in the inflow side passage (154a; 158a; 166a) located on the canister side rather than the valve port, the valve body is in the closed state, and the engine side passage is more negative than the portion where the negative pressure sensing portion is provided. A throttle valve portion (161) that is displaced in accordance with the operation of the negative pressure sensing portion when the pressure is, and narrows the cross-sectional area of the flow path in the inflow side passage.

  According to this throttle valve device, when the purge valve is in a closed state and the engine negative pressure is high, the throttle valve section reduces the cross-sectional area of the inflow side passage. it can. As a result, it is possible to suppress the fluctuation range of the pressure propagating from the passage in the purge valve to the canister side through the inflow side passage. The throttle valve portion is structured to be displaced so as to narrow the passage in accordance with the operation of the negative pressure sensing portion when the engine side passage is at a negative pressure. Therefore, the evaporation valve that circulates in the inflow side passage when the purge valve is opened. Fuel flow resistance can be reduced. As described above, it is possible to provide a throttle valve device capable of suppressing flow resistance at low negative pressure and reducing noise and the like accompanying pressure fluctuation at high negative pressure.

  One of the disclosed flow control devices includes the above-described throttle valve device (16; 1016), a housing (150) having an inflow side passage and a valve port therein, and an open valve state allowing the flow of evaporated fuel. A valve body (152) that opens and closes the valve port so as to switch to a valve closing state that blocks the flow of evaporated fuel, and a movable core (1511) that is displaced together with the valve body to switch between the valve opening state and the valve closing state. And an electromagnetic solenoid part (151) for generating a driving force for driving in the axial direction.

  According to this flow rate adjustment device, when the valve closing state and the engine negative pressure are high, the throttle valve device narrows the passage cross sectional area of the inflow side passage, so that the pressure fluctuation in the inflow side passage can be suppressed. As a result, it is possible to suppress the fluctuation range of the pressure propagating from the passage in the housing to the canister side through the inflow side passage. Since the throttling valve portion is displaced to narrow the passage according to the operation of the negative pressure sensing portion when the engine side passage is a negative pressure, the inflow side passage is It is possible to reduce the distribution resistance of the evaporated fuel that circulates. As described above, it is possible to provide a flow control device capable of suppressing flow resistance at low negative pressure and reducing noise and the like accompanying pressure fluctuation at high negative pressure.

It is a figure showing an evaporative fuel processing device provided with a flow control device of a 1st embodiment. It is the schematic which showed the structure and the state at the time of a low negative pressure about the throttle valve apparatus which the flow volume adjustment apparatus of 1st Embodiment has. It is the schematic which showed the state at the time of high negative pressure about the throttle valve apparatus which the flow regulating device of 1st Embodiment has. FIG. 4 is a partial cross-sectional view showing the valve body position of the throttle valve device at the time of high negative pressure in FIG. 3. It is the graph which showed the relationship between engine negative pressure and pressure fluctuation about a conventional product and an embodiment product. It is the schematic which showed the structure and the state at the time of a high negative pressure about the throttle valve apparatus which the flow volume adjustment apparatus of 2nd Embodiment has. It is the schematic which showed the structure and the state at the time of a high negative pressure about the throttle valve apparatus which the flow volume adjustment apparatus of 3rd Embodiment has. It is the schematic which showed the structure and the state at the time of a high negative pressure about the throttle valve apparatus which the flow volume adjustment apparatus of 4th Embodiment has. It is the schematic which showed the structure and the state at the time of a high negative pressure about the throttle valve apparatus connected to the purge valve of 5th Embodiment.

  Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. The same referential mark may be attached | subjected to the part corresponding to the matter demonstrated by the form preceded in each form, and the overlapping description may be abbreviate | omitted. When only a part of the configuration is described in each form, the other forms described above can be applied to other parts of the configuration. Not only combinations of parts which clearly indicate that combinations are possible in each embodiment, but also combinations of embodiments even if not explicitly specified, unless any problem occurs in the combinations. It is also possible.

First Embodiment
A first embodiment will be described with reference to FIGS. The flow rate adjustment device 15 is used in the evaporated fuel processing device 1 which is an evaporated fuel purge system mounted on a vehicle. As shown in FIG. 1, the evaporative fuel processing apparatus 1 supplies the HC gas or the like in the fuel adsorbed by the canister 13 to the intake passage of the engine 2 so that the evaporative fuel from the fuel tank 10 is released to the atmosphere. To prevent. The evaporated fuel processing apparatus 1 includes an intake system of an engine 2 that constitutes an intake passage of an engine 2 that is an internal combustion engine, and an evaporated fuel purge system that supplies evaporated 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 fuel for combustion supplied to the engine 2 from an injector or the like, and is 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 fuel for combustion. The intake system of the engine 2 is configured such that an intake pipe 21 constituting an intake passage is connected to an intake manifold 20, and a throttle valve 25, an air filter 24, and the like are provided in the middle of the intake pipe 21.

  In the fuel vapor purge system, the fuel tank 10 and the canister 13 are connected by a pipe 11 that constitutes a vapor passage, and the canister 13 and the intake pipe 21 are connected by a pipe 14 that constitutes a purge passage and a flow control device 15. Yes. 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, and the like in the intake air. The throttle valve 25 is an intake amount adjustment valve that adjusts the opening degree of the inlet portion of the intake manifold 20 to adjust the intake amount flowing into the intake manifold 20. The intake air passes through the intake passage, flows into the intake manifold 20, is mixed with combustion fuel injected from an 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, for example. The fuel tank 10 is connected to the inflow portion of the canister 13 by a pipe 11 that forms a vapor passage. The canister 13 is a container in which an adsorbent such as activated carbon is sealed, and evaporative fuel generated in the fuel tank 10 is taken in through the vapor passage and temporarily adsorbed on the adsorbent.

  The canister 13 is integrally provided with a valve module 12. The valve module 12 includes a canister close valve that opens and closes a suction portion for sucking fresh air outside, and an internal pump that can discharge gas to the atmosphere and suck air. It is built-in. By providing the canister 13 with a canister close valve, atmospheric pressure can be applied to the canister 13. The canister 13 can easily desorb, that is, purge, the evaporated fuel adsorbed on the adsorbent by the freshly sucked air.

  The flow control device 15 includes a purge valve and a throttle valve device 16. The purge valve includes a purge passage, that is, a valve body 152 for opening and closing a valve port included in a fuel passage 153 provided inside the housing 150 forming the flow rate adjusting device 15, and a biasing member. The valve port is a part of the fuel passage 153 opened and closed by the valve body 152. The purge valve is an example of a flow control device that can permit and block the supply of the evaporated fuel from the canister 13 to the engine 2. The purge valve is a valve device that maintains a state in which the fuel passage 153 is closed at a normal time when voltage is not supplied. The purge valve is in a closed state in which the valve body 152 is urged toward the valve port by an urging member such as a spring when no voltage is applied, and the fuel passage 153 is closed. When the voltage is applied, the fuel passage 153 is a normally closed valve device controlled to open the valve 153. By switching between the valve opening state and the valve closing state as described above, the purge valve can adjust the purge amount of the evaporated fuel in the evaporated fuel processing device 1.

  In recent years, the engine negative pressure has tended to decrease as the fuel consumption of the engine decreases, and the purge valve is required to have a performance capable of adjusting a large flow rate. On the other hand, it is known that the fluctuation range of the pressure when the valve body of the purge valve moves from the open state to the closed state becomes larger as the adjustable maximum flow rate in the purge valve becomes larger. Therefore, as the adjustable flow rate value of the purge valve is larger, the fluctuation range of the pressure between the purge valve and the canister 13 is larger, and this phenomenon is a factor of the noise in the vehicle. Since the piping connecting the purge valve and the canister 13 is provided, for example, under the floor of the vehicle compartment, noise due to vibration of the piping is easily transmitted to the vehicle interior. The evaporated fuel processing apparatus 1 of this embodiment has a function of suppressing the pressure fluctuation range.

  As shown in FIG. 2, the purge valve included in the flow rate adjustment device 15 includes a valve seat 155, a valve body 152, an electromagnetic solenoid unit 151, and the like. The electromagnetic solenoid unit 151 includes a yoke, a bobbin, a coil 1510, a fixed core, a movable core 1511, a connector for supplying power, and the like. The yoke, the fixed core, the movable core 1511 and the like are formed of a magnetic material. The electromagnetic solenoid unit 151 is configured to be able to control the current supplied to the coil 1510 by electrically connecting the terminal terminal to the control device 50 or the like that controls the supply voltage by the connector.

  The electromagnetic solenoid unit 151 is a valve for switching between an open valve state in which the valve body 152 is separated from the valve seat 155 to permit fluid flow and a closed valve state in contact with the valve seat 155 to block fluid flow. A driving force is generated to axially drive the movable core 1511 displaced integrally with the body 152. When the coil 1510 of the electromagnetic solenoid unit 151 is energized from the valve closed state, a magnetic flux is generated in the magnetic circuit formed by the yoke, the movable core 1511, the fixed core and the like. The movable core 1511 is axially attracted toward the fixed core by the magnetic force associated with the magnetic flux, thereby moving toward the fixed core against the biasing force of the biasing member, and the valve body 152 is moved to the valve seat 155 And the fuel passage 153 is opened.

  The control device 50 has at least one arithmetic processing unit (CPU) and at least one memory device as a storage medium for storing programs and data. The controller 50 is provided by, for example, a microcomputer provided with a computer readable storage medium. A storage medium is a non-transitory tangible storage medium which non-temporarily stores a computer readable program. The storage medium may be provided by semiconductor memory or a magnetic disk or the like. The control device 50 can be provided by a computer or a set of computer resources linked by a data communication device. The program is executed by the controller 50 to cause the controller 50 to function as the device described in this specification and to function the controller 50 to execute the method described in this specification.

  The means and / or function provided by the control device 50 can be provided by software stored in a tangible memory device and a computer that executes the software, only software, only hardware, or a combination thereof. For example, if the controller 50 is provided by an electronic circuit that is hardware, it can be provided by a digital circuit including a number of logic circuits, or an analog circuit.

  For example, the control device 50 controls the ratio of the on-time to the time of one cycle formed by the on-time and the off-time of the energization, that is, the duty ratio to energize the coil 1510. The purge valve is also referred to as a duty control valve. The purge valve can continuously control the valve opening amount by changing the duty ratio controlled by the duty signal. With this energization control, the flow rate (purge amount) of the evaporated fuel flowing through the fuel passage 153 can be adjusted.

  A housing 150 of the purge valve is provided with an input port 154 for receiving the supply of fluid from the canister 13 side and an output port 156 for the fluid to flow out to the engine 2 side. The passage in the output port 156 is an engine side passage 156 a located closer to the engine 2 than the fuel passage 153. The housing 150 accommodates the electromagnetic solenoid unit 151, the valve body 152, and the like. An inflow side passage 154 a provided inside the input port 154 is in communication with the canister 13 through a pipe 14 connected to the canister 13. The inflow side passage 154 a is a passage located closer to the canister 13 than the valve port and the valve body 152. In the inflow side passage 154a, the flow passage cross-sectional area is narrowed by the throttle valve device 16 when the intake pressure of the engine 2 brings about a high negative pressure state. The throttling valve device 16 is a device that can increase the flow resistance by sensing pressure and operating to squeeze the flow path on the canister 13 side, that is, the upstream side of the evaporative fuel flow rather than the purge valve.

  As shown in FIG. 2, the throttle valve device 16 is accommodated in the housing 150. The throttle valve device 16 is provided in the inflow side passage 154 a in the input port 154 provided in the housing 150. The throttle valve device 16 includes a throttle valve portion 161 provided so as to cross the inflow side passage 154a. The throttle valve portion 161 is a movable member which is provided with a throttle passage 161a which constitutes a flow passage, and which can be displaced in a direction intersecting the inflow side passage 154a. The throttle valve portion 161 is a circular or square columnar member or plate member. The throttle passage 161a is formed by a through-hole portion that penetrates the throttle valve portion 161 in a direction along the inflow side passage 154a. The throttle passage 161a has a passage cross-sectional area equal to or greater than that of the inflow side passage 154a.

  The housing 150 is in communication with the inflow side passage 154a, and a chamber portion is provided outside the inflow side passage 154a. The throttle valve portion 161 is integrally supported by the film-like body 162 on the housing 150. An outer edge portion of the film-like body 162 is fixed to a portion of the housing 150 which forms a chamber portion, and an inner edge portion is fixed to the throttle valve portion 161, thereby connecting the throttle valve portion 161 and the housing 150. The film-like body 162 is provided so as to cross the chamber portion. The film-like body 162 also functions as a blocking film for blocking air flow between the inflow side passage 154a and the negative pressure sensing passage 164a. The membrane-like body 162 is elastically deformable, and the throttle valve portion 161 can be displaced within the housing 150 by the membrane-like body 162 being elastically deformed. The film-like body 162 can be formed of metal or resin. The film-like body 162 can be elastically deformed by the pressure acting on the surface, and can be made of a diaphragm.

  The throttle valve portion 161 is also supported by an elastic body 163 interposed between the throttle valve portion 161 and the housing 150. The elastic body 163 is a member that can expand and contract in a direction intersecting the inflow side passage 154a, and supports the throttle valve portion 161 in a movable manner in this direction. The elastic body 163 biases the throttle valve portion 161 such that the passage axis of the throttle passage 161a and the passage axis of the inflow side passage 154a are coaxial or close to each other. Therefore, the elastic body 163 supports the throttle valve portion 161 so as to be displaceable in the direction intersecting the inflow side passage 154a, and the membrane-like body 162 throttle valve portion in the direction orthogonal to the direction supported by the elastic body 163. It supports 161. The elastic body 163 can be composed of, for example, a coil spring, a leaf spring, an elastic packing, rubber, or the like. It is preferable that the elasticity of the film-like body 162 and the elastic body 163 be set so as to have an appropriate elastic force so as not to be sensitive to a small fluctuation of the negative pressure of the engine 2.

  The flow rate adjusting device 15 includes a negative pressure sensing member 164 having therein a negative pressure sensing passage 164a communicating the chamber portion with the engine side passage 156a. Since the negative pressure sensing passage 164a communicates with the engine side passage 156a, the intake pressure of the engine 2 acts on the negative pressure sensing passage 164a through the engine side passage 156a when the purge valve is closed. Since the negative pressure sensing passage 164a communicates with the chamber portion, a negative pressure due to the intake pressure of the engine 2 acts on the film-like body 162 present in the chamber portion. As described above, the film-like body 162 is a negative pressure sensing unit which is elastically deformed by the pressure difference between the front and back, and operates based on the pressure of the engine side passage 156a.

  The throttle valve device 16 can switch the inflow side passage 154 a between the fully open state and the throttling state with respect to the flow passage cross sectional area of the inflow side passage 154 a according to the intake pressure of the engine 2. The fully open state is when the intake pressure of the engine 2 is low, and as shown in FIG. 2, the passage axis of the throttle passage 161 a and the passage axis of the inflow side passage 154 a are coaxial or nearly so. is there. The throttle state is when the intake pressure of the engine 2 is at a high load. As shown in FIGS. 3 and 4, the throttle valve portion 161 is drawn toward the negative pressure sensing passage 164a and the passage shaft of the throttle passage 161a. And the passage axis of the inflow side passage 154a are largely deviated.

  When the throttle valve device 16 is in the fully open state, the pressure fluctuation propagated from the valve body 152 to the inflow side passage 154a does not decrease in amplitude in the inflow side passage 154a as shown by the solid line in FIG. It is transmitted to the passage. When the throttle valve device 16 is in the throttle state, the pressure fluctuation propagated from the valve body 152 to the inflow side passage 154a passes through the passage narrowed by the throttle valve portion 161 as shown by the solid line in FIG. The amplitude is reduced and is transmitted to the passage on the canister 13 side. The fully open state corresponds to the time of traveling of the vehicle in which the noise level in the passenger compartment is high, and contributes to increasing the flow rate of the evaporated fuel at this time. The throttle state is the idling time when the intake pressure of the engine 2 is likely to be high and the noise level in the passenger compartment is low. At this time, the pressure fluctuation transmitted to the passage on the canister 13 side is suppressed, so the pulsation in the passage is suppressed. It can be reduced and noise can be prevented.

  The graph of FIG. 5 shows the result of examining the relationship between the negative pressure of the engine 2 and the pressure fluctuation in the passage on the canister 13 side for the conventional product and the embodiment product. As shown in FIG. 5, when the negative pressure of the engine 2 increases, when the throttle valve device 16 is fully open, the magnitude of pressure fluctuation increases and does not differ much from the conventional product. When the negative pressure of the engine 2 further increases, the conventional product continues to rise, and problems such as noise exceeding the upper limit value line occur. In contrast, in the embodiment product, when the throttle valve device 16 exceeds the valve throttle point that is a negative pressure at which the throttle valve device 16 changes from the fully open state to the throttle state, the throttle valve portion 161 reduces the flow passage cross-sectional area in the inflow side passage 154a. Pressure fluctuation turns downward and then declines. As described above, since the throttle valve device 16 changes from the fully open state to the throttling state, pressure fluctuation at high negative pressure is suppressed, so that vibration, noise and the like can be reduced.

  The effects brought about by the first embodiment will be described. The throttle valve device 16 is a device provided closer to the canister 13 than a purge valve for adjusting the flow rate of the evaporated fuel that flows out of the canister 13 and flows toward the engine 2 by the intake pressure of the engine 2. The throttle valve device 16 includes a negative pressure sensing passage 164 a, a negative pressure sensing unit, and a throttle valve unit 161. The negative pressure sensing passage 164a is provided to communicate with the engine side passage 156a located closer to the engine 2 than the valve opening at which the valve element 152 of the purge valve opens and closes. The negative pressure sensing unit is provided at a portion communicating with the negative pressure sensing passage 164a, and is operated by the pressure of the engine side passage 156a. The throttle valve portion 161 is provided in the inflow side passage 154a located closer to the canister 13 than the valve port. The throttling valve portion 161 is displaced according to the operation of the negative pressure sensing portion when the valve 152 is in the closed state and the engine side passage 156a has a negative pressure than the portion provided with the negative pressure sensing portion. Thus, the cross-sectional area of the flow path in the inflow side passage 154a is narrowed.

  According to the throttle valve device 16, when the purge valve is in the closed state and the engine negative pressure is high, the throttle valve portion 161 narrows the cross-sectional area of the inflow side passage 154a. Can be suppressed. By this action, the fluctuation range of the pressure propagating from the fuel passage 153 in the purge valve to the canister 13 side through the inflow side passage 154a can be suppressed. The throttling valve portion 161 is configured to be displaced so as to narrow the inflow side passage according to the operation of the negative pressure sensing portion when the engine side passage 156a is at a negative pressure at the time of closing the purge valve. Sometimes the flow resistance of the evaporated fuel flowing through the inflow side passage 154a can be reduced. As described above, the throttle valve device 16 can suppress the flow resistance at the time of low negative pressure and can reduce noise and the like due to pressure fluctuation at the time of high negative pressure, thereby suppressing the amplitude of the pipe and canister 13 and the like. It contributes to the suppression of vibration, sound, etc. transmitted to the room.

  Further, since the flow rate adjusting device 15 has a configuration capable of suppressing the fluctuation range of the pressure without having a large space, the enlargement of the device can be suppressed, and the vehicle mountability can be improved. The flow control device 15 can provide the evaporative fuel processing device 1 capable of controlling a large flow rate by the purge valve and suppressing the pressure fluctuation range in the pipe on the canister 13 side by the throttle valve device 16.

  The negative pressure sensing passage 164a is a passage connecting the engine side passage 156a and the inflow side passage 154a. According to this configuration, by providing the negative pressure sensing member 164 that forms the negative pressure sensing passage 164a, a device capable of sensing the intake pressure of the engine 2 with a simple configuration can be provided, and the pressure fluctuation can be suppressed. Contribute to reducing the size of the

  The negative pressure sensing part is a film-like body 162 provided so as to cross the chamber part communicating with the negative pressure sensing passage 164a. The throttling valve portion 161 is displaced when the film-like body 162 is in an elastically deformed state in which it is bent toward the negative pressure sensing passage 164 a side, and the flow passage cross-sectional area in the inflow side passage 154 a is narrowed. According to this configuration, the flow control device 15 is provided with the chamber portion in which the film-like body 162 is installed and the negative pressure sensing passage 164a connecting the chamber portion and the engine side passage 156a. An apparatus can be provided that suppresses pressure fluctuations that can occur during negative pressure. In other words, since the throttle valve device 16 operates according to the intake pressure of the engine 2, there is no need to construct a control configuration for controlling the timing of opening and closing the throttle valve. Can be provided.

  The throttle valve portion 161 is provided with a throttle passage 161a having a passage cross-sectional area equal to or larger than that of the inflow side passage 154a. As shown in FIGS. 3 and 4, when the throttle passage 161a is displaced relative to the inflow side passage 154a in the displacement direction of the throttle valve portion 161, the throttle valve portion 161 has a flow passage cross sectional area in the inflow side passage 154a. To narrow. According to this configuration, when the purge valve is in the closed state and the engine negative pressure is high, the throttle passage 161a is displaced in the displacement direction of the throttle valve portion 161 with respect to the inflow side passage 154a. Reduces the flow passage cross-sectional area of the inflow side passage 154a. Furthermore, since the throttle valve portion 161 includes the throttle passage 161a having a passage cross-sectional area equal to or larger than that of the inflow side passage 154a, the flow resistance of the evaporated fuel flowing through the inflow side passage 154a can be reduced when the purge valve is opened. Therefore, the flow control device 15 capable of detecting the intake pressure of the engine 2 can be provided with a simple configuration, which contributes to suppressing the increase in size of the device capable of suppressing pressure fluctuation.

  The flow rate adjusting device 15 includes a throttle valve device 16, a housing 150 having an inflow side passage 154a and a valve port therein, a valve body 152 that opens and closes the valve port so as to switch between a valve open state and a valve closed state, And an electromagnetic solenoid unit 151 generating a driving force for driving the movable core 1511 in the axial direction. According to the flow rate adjusting device 15, the throttle valve device 16 narrows the passage cross sectional area of the inflow side passage 154a when the valve closing state is high and the engine negative pressure is high, so that the pressure fluctuation in the inflow side passage 154a can be suppressed. . By this action, the fluctuation range of the pressure propagating from the passage in the housing 150 to the canister 13 side through the inflow side passage 154a can be suppressed. The throttling valve portion 161 is configured to be displaced to narrow the passage according to the operation of the negative pressure sensing portion when the engine side passage 156a has a negative pressure, so the inflow of the flow control device 15 occurs. The flow resistance in the side passage 154a can be reduced. As described above, the flow rate adjusting device 15 can suppress the flow resistance at the time of low negative pressure and can reduce noise and the like due to the pressure fluctuation at the time of high negative pressure, thereby suppressing the amplitude of the pipe and the canister 13 and the like. It contributes to the suppression of vibration, sound, etc. transmitted to the room.

Second Embodiment
A flow control device 15 of the second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in the configuration of the throttle valve device 1016. The configuration, operation, and effects not particularly described in the second embodiment are the same as those in the first embodiment. Hereinafter, differences from the first embodiment will be described.

  As shown in FIG. 6, the throttle valve device 1016 includes, as a negative pressure sensing unit, a film-like member 165 provided so as to cross the negative pressure sensing passage 164a. The throttle valve portion 161 is displaced when the membrane-like member 165 is in an elastically deformed state in which it bends to the engine side passage 156a, and narrows the flow passage cross sectional area in the inflow side passage 154a. The throttle passage 161 a included in the devices of the second to fifth embodiments is a passage formed between the passage wall forming the inflow side passage and the throttle valve portion 161, and accompanies the displacement of the throttle valve portion 161. The passage cross sectional area is changed.

  The housing 150 accommodates a throttle valve device 1016. The throttle valve device 1016 is provided in the inflow side passage 154 a in the input port 154 provided in the housing 150. The throttle valve portion 161 is a movable member which can be displaced in a direction intersecting the inflow side passage 154a. The throttle valve portion 161 is supported by a support member 165 a having one end coupled to the membrane member 165 and the other end coupled to the throttle valve portion 161. The support member 165a is, for example, a rod-like member, and can be configured by a wire or the like that is not easily deformed.

  The film-like body 165 can be elastically deformed by pressure acting on the surface in the same manner as the film-like body 162 of the first embodiment. The throttling valve portion 161 can be displaced within the housing 150 by displacing the support member 165 a in accordance with the elastic deformation of the film-like body 165. The film-like body 165 can also be formed of a diaphragm as with the film-like body 162.

  The elastic body 163 biases the throttle valve portion 161 such that the cross-sectional area of the flow passage in the inflow side passage 154 a is not narrowed by the throttle valve portion 161 at low negative pressure. The film-like body 165 and the elastic body 163 support the throttle valve portion 161 so as to be displaceable in the direction intersecting the inflow side passage 154a. It is preferable that the elasticity of the film-like body 165 and the elastic body 163 be set to have an appropriate elastic force so as not to be sensitive to a small fluctuation of the negative pressure of the engine 2.

  According to the throttle valve device 1016 of the second embodiment, the negative pressure sensing unit is provided to cross the negative pressure sensing passage 164a and is operated by the pressure of the engine side passage 156a. According to this configuration, by installing the film-like body 165 in the negative pressure sensing passage 164a, the space for mounting the throttle valve device 1016 can be reduced, and the throttle valve device contributes to the miniaturization of the flow rate adjusting device 15. 1016 can be provided.

Third Embodiment
A flow control device 15 of the third embodiment will be described with reference to FIG. The third embodiment is different from the second embodiment in the configuration of the output port 157. The configuration, operation, and effects not particularly described in the third embodiment are the same as those in the above-described embodiment. Hereinafter, differences from the above-described embodiment will be described.

  As shown in FIG. 7, the output port 157 through which the fluid flows to the engine 2 side extends along the input port 154. The passage in the output port 157 is an engine-side passage 157 a located closer to the engine 2 than the fuel passage 153. The engine side passage 157a is bent outside the housing 150 and extends along the inflow side passage 154a. According to the flow control device 15 of the third embodiment, the negative pressure sensing passage 164a can be configured to be short, which also contributes to suppressing the physical size of the flow control device 15 as a whole.

Fourth Embodiment
A flow control device 15 of the fourth embodiment will be described with reference to FIG. The fourth embodiment is different from the second embodiment in the configuration of the input port 158. The configuration, operation, and effects not particularly described in the fourth embodiment are the same as those in the above-described embodiment. Hereinafter, differences from the above-described embodiment will be described.

  As shown in FIG. 8, the input port 158 extends along the output port 156. The passage in the input port 158 is the inflow side passage 158a. The inflow side passage 158a extends along the engine side passage 156a. According to the flow control device 15 of the fourth embodiment, the negative pressure sensing passage 164a can be configured to be short, which also contributes to suppressing the overall size of the flow control device 15.

Fifth Embodiment
A fifth embodiment will be described with reference to FIG. The fifth embodiment is different from the second embodiment in that the throttle valve device 2016 is connected to the input port 159 and the output port 156 of the purge valve 1015. The configuration, operation, and effects not particularly described in the fifth embodiment are the same as those in the above-described embodiment. Hereinafter, differences from the above-described embodiment will be described.

  As shown in FIG. 9, the throttle valve device 2016 includes an inflow side member 166 that houses the throttle valve portion 161, an engine side member 167, and a negative pressure sensing member that connects the inflow side member 166 and the engine side member 167. 164, and. The inflow side member 166 is connected to the input port 159, and the engine side member 167 is connected to the output port 156. As a result, the inflow side passage 166a in the inflow side member 166 communicates with the inflow side passage 159a in the input port 159, and the flow passage cross-sectional area is narrowed by the throttle valve portion 161 at high negative pressure. The engine side passage 167a in the engine side member 167 is in communication with the engine side passage 156a in the output port 156, and is in communication with the inflow side passage 166a through the negative pressure sensing passage 164a.

  According to the fifth embodiment, by configuring the purge valve 1015 and the throttle valve device 2016 as separate devices and connecting them, the existing purge valve is equipped with the throttle valve device 2016 having a pressure fluctuation suppressing function. The fuel vapor processing apparatus 1 can be provided.

(Other embodiments)
The disclosure of this specification is not limited to the illustrated embodiments. The disclosure includes the illustrated embodiments and variations based on them by those skilled in the art. For example, the disclosure is not limited to the combination of parts and elements shown in the embodiments, and can be implemented with various modifications. The disclosure can be implemented in various combinations. The disclosure can have additional parts that can be added to the embodiments. The disclosure includes those in which the components and elements of the embodiment are omitted. The disclosure includes replacements of parts, components, or combinations between one embodiment and another embodiment. The disclosed technical scope 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 throttle valve portion 161 according to the first embodiment is configured to be displaced according to the deformed state of the film-like member 165 provided in the negative pressure sensing passage 164a as shown in the second to fifth embodiments. May be.

  The purge valve 1015 and the throttle valve device 2016 of the fifth embodiment may be configured such that the engine side passage 167a and the inflow side passage 166a extend in parallel as in the third embodiment or the fourth embodiment.

  In the above embodiment, the controller 50 controls the ratio of the on time to the time of one cycle formed by the on time and the off time of the energization, that is, the duty ratio to supply power to the purge valve. Not limited to such power supply. For example, the purge valve may be controlled by on / off control that selects either the on state to which a predetermined voltage value is supplied or the off state to which power is not supplied according to the measurement value.

DESCRIPTION OF SYMBOLS 2 ... Engine, 13 ... Canister, 15 ... Flow control device 1015 ... Purge valve, 16, 1016, 2016 ... Throttle valve device 150 ... Housing, 152 ... Valve body, 153 ... Fuel passage (valve port)
154a, 158a, 166a ... Inflow side passage 156a, 157a, 167a ... Engine side passage 161 ... Throttle valve portion, 162, 165 ... Membrane (negative pressure sensing portion)
164a ... negative pressure sensing passage

Claims (6)

A throttling valve device (16; 1016) provided on the canister side with respect to a purge valve (1015) for adjusting the flow rate of evaporated fuel flowing out of the canister (13) and flowing toward the engine by the intake pressure of the engine (2). 2016),
A negative pressure sensing passage (164a) provided to communicate with the engine side passage (156a; 157a; 167a) positioned closer to the engine than the valve port (153) at which the valve body (152) of the purge valve opens and closes. When,
A negative pressure sensing unit (162; 165) that is provided in the negative pressure sensing passage or in a portion that communicates with the negative pressure sensing passage and operates according to the pressure of the engine side passage;
It is provided in the inflow side passage (154a; 158a; 166a) which is located on the canister side rather than the valve port, the valve body is in the valve closing state, and the engine side is more than the part where the negative pressure sensing portion is provided. A throttle valve portion (161) that is displaced in accordance with the operation of the negative pressure sensing portion when the passage has a negative pressure and narrows the cross-sectional area of the flow path in the inflow side passage;
A throttle valve device.   The throttle valve device according to claim 1, wherein the negative pressure sensing passage is a passage that connects the engine side passage and the inflow side passage. The negative pressure sensing part is a film-like body (162) provided so as to traverse the chamber part communicating with the negative pressure sensing passage.
3. The throttle valve portion is displaced when the film-like body is in an elastically deformed state in which the membrane is bent toward the negative pressure sensing passage side, and narrows the flow passage cross-sectional area in the inflow side passage. The throttle valve device described. The negative pressure sensing unit is a film-like body (165) provided to cross the negative pressure sensing passage,
The said throttle valve part is displaced when the said film-like body is in the elastic deformation state bent to the said engine side channel | path side, and narrows the flow-path cross-sectional area in the said inflow side channel | path. Throttle valve device. The throttle valve portion is provided with a throttle passage (161a) having a passage cross-sectional area equal to or larger than that of the inflow side passage,
The said throttle valve part narrows the flow-path cross-sectional area in the said inflow side channel | path when the said throttle channel | path has shifted | deviated to the displacement direction of the said throttle valve part with respect to the said inflow side channel | path. The throttle valve device according to 1. A throttle valve device (16; 1016) according to any one of the preceding claims.
A housing (150) having the inflow side passage and the valve port therein;
A valve body (152) that opens and closes the valve opening so as to switch between a valve open state that permits the flow of evaporated fuel and a valve closed state that blocks the flow of evaporated fuel;
An electromagnetic solenoid portion (151) for generating a driving force for driving the movable core (1511) displaced together with the valve body in the axial direction in order to switch between the valve open state and the valve closed state;
A flow control device comprising:

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