WO2021059724A1 - Dispositif de soupape de commande de purge - Google Patents

Dispositif de soupape de commande de purge Download PDF

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Publication number
WO2021059724A1
WO2021059724A1 PCT/JP2020/028787 JP2020028787W WO2021059724A1 WO 2021059724 A1 WO2021059724 A1 WO 2021059724A1 JP 2020028787 W JP2020028787 W JP 2020028787W WO 2021059724 A1 WO2021059724 A1 WO 2021059724A1
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Prior art keywords
valve
internal passage
mode
mover
passage
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PCT/JP2020/028787
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English (en)
Japanese (ja)
Inventor
康規 小林
曄楠 李
雅明 平野
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浜名湖電装株式会社
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Application filed by 浜名湖電装株式会社 filed Critical 浜名湖電装株式会社
Publication of WO2021059724A1 publication Critical patent/WO2021059724A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir

Definitions

  • the disclosure in this specification relates to a purge control valve device.
  • Patent Document 1 discloses an electromagnetic valve device that individually drives each of two movers according to a magnetic field formed by separate solenoid coils. This solenoid valve device has a separate electrical circuit for each of the two movers.
  • the solenoid valve device of Patent Document 1 requires two electric circuits in order to electromagnetically drive two movers.
  • the solenoid valve device of Patent Document 1 has room for improvement in terms of the number of parts.
  • An object disclosed in this specification is to provide a purge control valve device capable of driving two movers by one electric circuit.
  • One of the disclosed purge control valve devices is an inflow port into which the evaporated fuel spilled from the canister flows in, an outflow port in which the evaporative fuel flows out toward the engine, and a passage inside the housing connecting the inflow port and the outflow port.
  • a housing having a housing, a first valve provided inside the housing and having a first valve body for controlling the flow rate of fuel vapor flowing down the internal passage of the housing, and a first valve provided inside the housing and flowing down the internal passage of the housing.
  • a second valve having a second valve body that controls the flow rate of the evaporative fuel, one solenoid unit that is energized to form one electric circuit, and the first valve according to the electromagnetic force generated by one electric circuit.
  • first mover that is driven together with the body and a second mover that is driven together with the second valve body in response to an electromagnetic force generated by one electric circuit.
  • first mover and the second mover one mover is formed containing a hard magnetic material, and the other mover contains a soft magnetic material whose magnetization is more easily changed by an external magnetic field than one mover. It is formed.
  • the electromagnetic force generated by one electric circuit formed by energizing one solenoid unit drives the first mover and the second mover.
  • a purge control valve device in which two movers can be driven by one electric circuit, and it is possible to reduce the number of parts.
  • one of the two movers is formed by containing a hard magnetic material, it has a property of being less susceptible to electromagnetic force than the other mover. Therefore, since the first mover and the second mover can be driven individually, the opening degree of the first valve body and the second valve body with respect to the internal passages can be different from each other. As a result, this device can control the opening degree of each of the two valve bodies individually, and can adjust the purge flow rate of the evaporated fuel.
  • 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.
  • 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 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 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.
  • 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.
  • the fuel tank 10 and the canister 13 are connected by a pipe 11 constituting a vapor passage.
  • 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.
  • 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 amount of intake air 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 ORVR valve 15 is provided in the fuel tank 10.
  • the ORVR valve 15 prevents the evaporated fuel in the fuel tank 10 from being discharged into the atmosphere from the fuel filler port during fuel refueling.
  • the ORVR valve 15 is a float valve whose position is displaced according to the liquid level of the fuel. When the fuel in the fuel tank 10 is low, the ORVR valve 15 is opened, and the paper is discharged from the fuel tank 10 to the canister 13 by the pressure at the time of refueling. When a predetermined amount or more of fuel is present in the fuel tank 10, the ORVR valve 15 is closed by the buoyancy of the fuel to prevent the evaporated fuel from flowing out to the canister 13.
  • 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 provided with a valve module 12 integrally or 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.
  • 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 plurality of valve bodies that open and close the passage inside the housing in the housing 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 control device 50 controls the inflow port 31a and the outflow port 33a so as to communicate with each other when the vehicle is traveling, 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 There is a difference. 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.
  • 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 50 controls the operation of the first valve 34 and the second valve 35 by controlling the applied voltage.
  • the purge valve 3 has one solenoid unit 36, and energizes the solenoid unit 36 to form one electric circuit.
  • the first valve 34 and the second valve 35 are driven in the axial direction by using an electromagnetic driving force generated by a magnetic flux generated by a common electric circuit to open the valves, and open their respective passages.
  • the control device 50 is configured to control the electric power supplied from the power supply unit 51 such as a battery and apply it to the solenoid unit 36.
  • the control device 50 can control the duty ratio of the positive side voltage, which is the ratio of the on-time to the unit time of the total on and off of the positive side voltage, to energize the coil unit 360.
  • the energization control in which the positive side voltage is applied is an energization control in which the application of the positive side voltage and the non-application of the positive side voltage are alternately repeated. As shown in FIG. 6, the control device 50 controls the duty ratio of the positive side voltage application in the range of 0% to 100%.
  • the control device 50 has an inverter device that controls the AC signal voltage, and can control the AC signal voltage to energize the coil unit 360. As shown in FIG. 6, the control device 50 controls the duty ratio of the positive side voltage application or the duty ratio of the negative side voltage application in the range of 0% to 100% by controlling the AC signal voltage.
  • the control device 50 appropriately controls the first valve 34 and the second valve 35 by controlling the energization, and adjusts the purge amount of the evaporated fuel so that a predetermined air-fuel ratio is maintained.
  • 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 control device 50 is provided, for example, by a microcomputer having a storage medium that can be read by a computer.
  • a storage medium is a non-transitional substantive storage medium that stores a computer-readable program non-temporarily.
  • the storage medium may be provided by a semiconductor memory, a magnetic disk, or the like.
  • the control device 50 may be provided by a single computer, or a set of computer resources linked by a data communication device.
  • the program when executed by the control device 50, causes the control device 50 to function as the device described herein and to perform the method described herein.
  • control device 50 can be provided by software recorded in a substantive memory device and a computer, software only, hardware only, or a combination thereof that executes the software.
  • control device 50 can be provided by an electronic circuit that is hardware, it can be provided by a digital circuit or an analog circuit that includes a large number of logic circuits.
  • the purge valve 3 is required to have a performance capable of adjusting a large flow rate. If an attempt is made to increase the flow rate of the purge valve 3, the fluctuation range of the pressure in the flow path connecting the purge valve 3 and the canister 13 may become large. The increase in the pressure fluctuation range causes vibration of the piping due to pulsation, which causes noise in the vehicle. Further, as the flow rate of the purge valve 3 is increased, a fluttering noise of the ORVR valve 15 may be generated.
  • the pipe 14 connecting the purge valve 3 and the canister 13 is provided, for example, under the floor in the vehicle interior.
  • the evaporative fuel processing device 1 has an effect of suppressing the pressure fluctuation width in the flow path on the canister side and the fluttering noise of the ORVR valve 15. Further, when trying to increase the flow rate of the purge valve 3, the accuracy of the flow rate control is lowered, so that the accuracy of the concentration learning of the evaporated fuel tends to be lowered. Therefore, the evaporative fuel processing device 1 has an effect of ensuring the accuracy of learning the concentration of the evaporative fuel.
  • the purge valve 3 has a first valve 34 and a second valve 35 provided inside the housing.
  • the first valve 34 and the second valve 35 are arranged in parallel in the housing internal passage of the purge valve 3.
  • the first valve 34 and the second valve 35 are arranged so that the first valve body 340 and the second valve body 350 are aligned in the axial direction of the purge valve 3 or the displacement direction of the valve body.
  • FIG. 2 shows that the first valve 34 and the second valve 35 are controlled in a closed state.
  • the first valve 34 opens and closes the first internal passage 34a2 provided in the purge valve 3.
  • the second valve 35 opens and closes the second internal passage 35a2 provided in the purge valve 3.
  • the first internal passage 34a2 is a passage in the first duct 34a integrally provided in the first housing 31.
  • the second internal passage 35a2 is a passage in the second duct 35a integrally provided in the first housing 31.
  • the first internal passage 34a2 and the second internal passage 35a2 are arranged in parallel in the internal passage in the housing.
  • the second internal passage 35a2 is a passage having a passage crossing area larger than that of the first internal passage 34a2.
  • the purge valve 3 includes a first valve 34 capable of adjusting a small flow rate and a second valve 35 capable of adjusting a large flow rate as compared with the first valve 34.
  • the first duct 34a is provided with a first valve seat portion 34a1 on which the first valve body 340 is seated at the upstream end portion.
  • the second duct 35a includes a second valve seat portion 35a1 on which the second valve body 350 is seated at the upstream end portion.
  • Each of the first duct 34a and the second duct 35a forms an internal passage in which the passage crossing area is larger in the downstream end passage than in the upstream end passage.
  • the cross-sectional area of the first internal passage 34a2 becomes smaller toward the upstream end.
  • the cross-sectional area of the second internal passage 35a2 becomes smaller toward the upstream end.
  • the purge valve 3 includes a first housing 31 and a second housing 33 as housings.
  • the first housing 31 and the second housing 33 are made of, for example, a resin material.
  • the first housing 31 includes an inflow port 31a into which the evaporated fuel from the canister 13 flows in.
  • the inflow port 31a is connected to a pipe 14 forming a purge passage in the evaporative fuel processing device 1.
  • the inflow port 31a communicates with the canister 13 via the connected pipe 14.
  • the housing is provided with a connector 37 containing a terminal 371 for energizing the solenoid unit 36.
  • the terminal 371 is an energizing terminal that is electrically connected to the coil portion 360.
  • a power supply side connector for supplying electric power from the power supply unit 51 or the current control device is connected to the connector 37.
  • the current that energizes the coil unit 360 can be controlled by the configuration in which the connector 37 and the power supply side connector are connected and the terminal 371 is electrically connected to the control device 50 or the like.
  • the inflow port 31a is a part of a tubular portion having a fluid inflow passage 31a1 inside, and is located at an upstream end portion in the first housing 31.
  • the downstream end of the inflow passage 31a1 is connected to the inflow side chamber chamber in the first housing 31.
  • the inflow side chamber chamber has a larger passage crossing area than the inflow passage 31a1, and is provided around the solenoid portion 36 inside the first housing 31.
  • the inflow side chamber chamber is connected to the upstream end of the first internal passage 34a2 and the upstream end of the second internal passage 35a2.
  • the inflow side chamber chamber includes a first inflow side chamber chamber and a second inflow side chamber chamber communicating with each other through the communication passage 321.
  • the upstream end of the first internal passage 34a2 is located in the first inflow side chamber chamber and communicates with the first inflow side chamber chamber.
  • the upstream end of the second internal passage 35a2 is located in the second inflow side chamber chamber and communicates with the second inflow side chamber chamber.
  • the first housing 31 accommodates the first valve 34 and the second valve 35. Inside the first housing 31, a first valve 34 and a second valve 35 are coaxially provided.
  • the solenoid portion 36 is surrounded by the resin mold portion 32 inside the first housing 31.
  • the solenoid unit 36 includes a coil unit 360, a bobbin 361, a core stator 362, a yoke 363, and the like.
  • the communication passage 321 is a passage that penetrates the resin mold portion 32.
  • the first valve 34 and the second valve 35 are provided coaxially with the solenoid portion 36.
  • the second housing 33 includes an outflow port 33a that allows evaporated fuel to flow out toward the intake pipe 21.
  • the outflow port 33a communicates with the intake pipe 21 via a connected pipe.
  • the outflow port 33a is a tubular portion having a fluid outflow passage 33a1 inside, and is located at the downstream end of the second housing 33.
  • the downstream end of the outflow passage 33a1 is connected to the outflow side chamber chamber 331 in the second housing 33.
  • the outflow side chamber chamber has a larger passage crossing area than the outflow passage 33a1, and is connected to the downstream end of the first internal passage 34a2 and the downstream end of the second internal passage 35a2.
  • the first internal passage 34a2 and the second internal passage 35a2 communicate with the outflow passage 33a1 via the outflow side chamber chamber 331.
  • the purge valve 3 includes one inflow port 31a into which the fluid flows in from the outside and one outflow port 33a in which the fluid flows out to the outside.
  • the fluid flowing into the purge valve 3 flows down from the inflow side chamber chamber in the order of the outflow side chamber chamber 331 and the outflow passage 33a1 via at least one of the first internal passage 34a2 and the second internal passage 35a2.
  • An electromagnetic force generated by a common magnetic circuit formed by applying a voltage to a common solenoid portion 36 is applied to the first valve 34 and the second valve 35.
  • the first mover 341 of the first valve 34 and the second mover 351 of the second valve 35 have a configuration in which they are easily magnetized with respect to an external magnetic field.
  • the operation of the first mover 341 and the operation of the second mover 351 are different because there is a difference in the electromagnetic force received by the mover due to the common magnetic circuit.
  • the first valve 34 and the second valve 35 do not operate in the same manner but operate individually.
  • the first valve 34 includes a first mover 341, a first shaft portion 342, a first spring 343, and the like.
  • the central axis of the first mover 341 corresponds to the central axis of the first valve 34 and the central axis of the purge valve 3.
  • the first mover 341 is a bottomed cup-shaped body.
  • the first mover 341 is provided so as to surround the first spring 343.
  • the first spring 343 is provided between the first shaft portion 342 and the first mover 341.
  • the first spring 343 provides an urging force that moves the first mover 341 away from the first shaft portion 342.
  • the first spring 343 provides an urging force for moving the first mover 341 toward the first valve seat portion 34a1.
  • the first valve body 340 is made of an elastically deformable material such as rubber.
  • the first valve body 340 is integrally provided at the axial end portion of the first mover 341.
  • the second valve 35 includes a second mover 351 and a second shaft portion 352, a second spring 353, and the like.
  • the central axis of the second mover 351 corresponds to the central axis of the second valve 35 and the central axis of the purge valve 3.
  • the second mover 351 is a bottomed cup-shaped body.
  • the second mover 351 is provided so as to surround the second spring 353.
  • the second spring 353 is provided between the second shaft portion 352 and the second mover 351.
  • the second spring 353 provides an urging force that moves the second mover 351 away from the second shaft portion 352.
  • the second spring 353 provides an urging force for moving the second mover 351 toward the second valve seat portion 35a1.
  • the second valve body 350 is made of an elastically deformable material such as rubber.
  • the second valve body 350 is integrally provided at the axial end portion of the second mover 351.
  • one mover may be formed to include a hard magnetic material.
  • the other mover is formed to contain a softer magnetic material than one mover.
  • the soft magnetic material is a material whose magnetization is more easily changed by an external magnetic field than the hard magnetic material.
  • the hard magnetic material is a magnetic material having a high coercive force and does not easily demagnetize with respect to an external magnetic field.
  • a permanent magnet, a ferrite magnet, an NdFeB-based magnet, platinum iron, platinum cobalt, or the like can be adopted.
  • a soft magnetic material is a magnetic material that has a large magnetization and magnetic permeability and changes its magnetization according to the direction and magnitude of an external magnetic field.
  • the soft magnetic material for example, pure electromagnetic iron, ferrite, silica iron and the like can be adopted.
  • the case where the first mover 341 contains a soft magnetic material and the second mover 351 contains a hard magnetic material will be described.
  • the coil portion 360 When the coil portion 360 is energized, a magnetic circuit is formed.
  • the magnetic circuit forms a first magnetic path through the yoke 363, core stator 362, and first mover 341 and a second magnetic path through the yoke 363, core stator 362, and second mover 351.
  • the first path generates an electromagnetic force that attracts the first mover 341 to the first shaft portion 342 against the urging force of the first spring 343.
  • the first valve body 340 switches from the valve closed state to the valve open state by this electromagnetic force.
  • the magnetic flux generated by the second path repels the magnetic flux extending from the north pole of the second mover 351.
  • the second valve body 350 remains urged by the second spring 353 and is closed.
  • the magnetic flux generated by the second path attracts the magnetic flux extending from the north pole of the second mover 351.
  • the second valve body 350 generates an electromagnetic force that attracts the second mover 351 to the second shaft portion 352 against the urging force of the second spring 353.
  • the second valve body 350 switches from the valve closed state to the valve open state by this electromagnetic force.
  • FIG. 3 shows that the first valve 34 is in the valve open state separated from the first valve seat portion 34a1, and the second valve 35 is in the valve closed state in which the second valve 35 is seated on the second valve seat portion 35a1.
  • the purge valve 3 is controlled to the state shown in FIG. 3 when the mode of the first increase rate region in which the flow rate increase rate is small as shown in the graph of FIG. 6 is executed.
  • the control device 50 applies the electric power supplied from the power supply unit 51 to the coil unit 360 by controlling the duty ratio of the positive side voltage.
  • the purge valve 3 is configured so that the magnetic flux generated by the solenoid unit 36 when a positive voltage is applied repels the magnetic flux of the mover containing the hard magnetic material.
  • the second mover 351 which is a permanent magnet and the magnetic flux acting on the core stator 362 and the second mover 351 by the magnetic circuit repel each other
  • the second mover 351 is the second valve seat.
  • the valve closed state seated on the portion 35a1 is maintained. Since the first mover 341 contains a soft magnetic material, the first valve 34 is opened at a ratio corresponding to the duty ratio of the applied voltage. In the mode of the first increase rate region, as shown in FIG.
  • the first valve 34 is opened at a ratio corresponding to the duty ratio of the positive side voltage, and the second valve 35 is closed regardless of the duty ratio.
  • the control device 50 executes energization control in which the duty ratio of the positive side voltage application is gradually increased from 0% to 100% as in the mode of the first increase rate region shown in FIG. As a result, the valve opening rate of the first valve 34 increases, and the flow rate flowing down the first internal passage 34a2 increases.
  • FIG. 4 shows that the first valve 34 is in the valve open state and the second valve 35 is in the valve open state separated from the second valve seat portion 35a1.
  • the purge valve 3 is controlled to the state shown in FIG. 4 when the mode of the second increase rate region in which the flow rate increase rate as shown in the graph of FIG. 6 is larger than the first increase rate region is executed.
  • the control device 50 applies the electric power supplied from the power supply unit 51 to the coil unit 360 by controlling the duty ratio of the AC signal voltage.
  • the energization control in which the AC signal voltage is applied is an energization control in which the positive side voltage and the negative side voltage are alternately applied.
  • the duty ratio of the AC signal voltage is the ratio of the application time of the negative voltage to the unit time.
  • the purge valve 3 is configured so that the magnetic flux generated by the solenoid unit 36 when a negative voltage is applied attracts the magnetic flux of the mover containing the hard magnetic material.
  • the second mover 351 which is a permanent magnet and the magnetic flux acting on the core stator 362 and the second mover 351 by the magnetic circuit attract each other
  • the second mover 351 is the second valve seat portion.
  • the valve is opened apart from 35a1. Since the first mover 341 contains a soft magnetic material, the first valve 34 opens at both the positive voltage application time and the negative voltage application time. Therefore, the first valve 34 is opened as shown in FIG. carry on. In the mode of the second increase rate region, as shown in FIG.
  • the first valve 34 keeps opening, and the second valve 35 opens at a rate corresponding to the duty ratio of the negative voltage.
  • the control device 50 executes energization control in which the duty ratio of the negative side voltage application in the AC signal voltage application is gradually increased from 0% to 100% as in the mode of the second increase rate region.
  • the valve opening rate of the second valve 35 increases while the first valve 34 is fully opened, and the flow rate flowing down the second internal passage 35a2 increases.
  • the flow rate flowing out from the purge valve 3 does not change significantly and continues to increase continuously.
  • the control device 50 executes the process according to the flowchart of FIG. This flowchart starts when the evaporated fuel flows down toward the engine 2.
  • the control device 50 determines whether or not the concentration of the evaporated fuel is learned in step S100. If it is determined in step S100 that the concentration learning is being performed, the control device 50 determines in step S120 whether or not the second valve 35 is in the closed state. If it is determined in step S120 that the second valve 35 is in the closed state, the process returns to step S100 and the determination process of step S100 is executed. When it is determined in step S120 that the second valve 35 is not in the closed state, a positive voltage is applied to the coil portion 360 in step S125, and the determination process of step S100 is executed. The control device 50 executes control in which the duty ratio of the positive side voltage is gradually increased from 0% to 100%.
  • the control device 50 determines whether or not the noise generation condition is satisfied in step S110.
  • the noise generation condition is a preset condition that can be assumed to generate noise due to pressure fluctuation in the passage through which the evaporated fuel flows and the generation of the fluttering noise of the ORVR valve 15.
  • the noise generation condition can be set, for example, to be satisfied when the current vehicle speed is equal to or lower than a predetermined speed. In this case, the control device 50 acquires the current vehicle speed based on the vehicle speed information detected by the vehicle speed sensor 61.
  • the vehicle speed sensor 61 outputs vehicle speed information to the vehicle ECU 60 that controls the traveling of the vehicle and the cooling system necessary for the traveling of the vehicle, and the vehicle speed information is output from the vehicle ECU 60 to the control device 50.
  • the predetermined speed is preferably set based on experimental results or empirical rules, and is set to a vehicle speed at which the noise is drowned out by the running noise and is difficult for the occupants in the vehicle interior to recognize. By setting the noise generation condition to be satisfied when the current vehicle speed is lower than the predetermined speed, it is possible to suppress the noise that tends to be generated when the vehicle speed is low and the running noise is low.
  • step S110 when the vehicle is stopped, running at a low speed, or when the engine 2 is idling, the control device 50 determines that the noise generation condition is satisfied in step S110. If it is determined in step S110 that the noise generation condition is satisfied, the process proceeds to step S120, and the determination process of step S120 is executed.
  • the flow of returning from step S120 to step S100 and the flow of returning to step S100 after executing step S125 implement the mode of the first increase rate range of FIG.
  • the flow rate increase rate of the fluid is small, so that the concentration learning accuracy of the evaporated fuel can be improved.
  • the flow rate change in the small flow rate region can be made smaller than that of the solenoid valve in which the flow rate increase rate is constant.
  • the flow rate is suppressed, so that the effect of reducing the pulsation and suppressing the noise can be obtained.
  • the fluid flow rate is suppressed, so that the effect of reducing the fluttering of the ORVR valve 15 and suppressing the noise can be obtained.
  • step S110 determines whether or not the noise generation condition is not satisfied. If it is determined in step S110 that the noise generation condition is not satisfied, the control device 50 determines whether or not the duty ratio of the positive side voltage has reached 100% in step S130. If it is determined in step S130 that the duty ratio of the positive voltage has not reached 100%, the process returns to step S100 and the determination process of step S100 is executed. When it is determined in step S130 that the duty ratio of the positive voltage has reached 100%, it is determined in step S140 whether or not the second valve 35 is in the closed state.
  • step S140 If it is determined in step S140 that the second valve 35 is not in the closed state, the process returns to step S100 and the determination process of step S100 is executed.
  • the control device 50 applies an AC signal voltage to the coil unit 360 in step S150.
  • the control device 50 executes control in step S160 to gradually increase the duty ratio of the negative side voltage in the AC signal voltage from 0% to 100%, and returns to step S100.
  • steps S150 and S160 the fluid flow rate controlled by the purge valve 3 can be smoothly shifted from the first increase rate region to the second increase rate region as shown in FIG.
  • the mode of the second increase rate range shown in FIG. 6 is executed.
  • the valve opening rate of the second valve 35 whose large flow rate can be adjusted is increased, so that the large flow rate can be promoted.
  • the flow rate change in a large flow rate region can be made larger than that of the solenoid valve in which the flow rate increase rate is constant. Therefore, the fluid flow rate can be increased quickly in a state where noise is unlikely to be generated, and the operation satisfying the output requirement of the engine 2 can be realized.
  • the control according to the flowchart of FIG. 5, as shown in FIG. 6, it is possible to provide the flow rate control capable of suppressing the noise caused by the fluttering of the ORVR valve 15 and increasing the flow rate.
  • control device 50 may determine in step S110 that the noise generation condition is satisfied when the current rotation speed of the engine 2 is lower than the predetermined rotation speed.
  • the predetermined number of revolutions is preferably set based on experimental results or empirical rules, and is set to such a number of revolutions that the noise is drowned out by the engine sound and is difficult for the occupant to recognize. And.
  • the condition for generating noise when the current engine speed is lower than the predetermined engine speed the noise caused by pressure fluctuations and the like becomes noise when the engine speed is small and quiet. It can be suppressed.
  • the purge control valve device includes a first valve 34 and a second valve 35 provided inside the housing, and one solenoid unit 36 that is energized to form one electric circuit.
  • the purge control valve device includes a first mover 341 and a second mover 351 that are driven in response to an electromagnetic force generated by one electric circuit.
  • the first mover 341 and the second mover 351 one mover is formed containing a hard magnetic material, and the other mover is made of a soft magnetic material whose magnetization is more easily changed by an external magnetic field than one mover. It is formed by including.
  • the electromagnetic force generated by one electric circuit formed by energizing one solenoid unit 36 drives the first mover 341 and the second mover 351. Since the purge control valve device can drive two movers by one electric circuit, it is possible to provide a device that reduces the number of parts. Further, since one of the two movers is formed by containing a hard magnetic material, it has a property of being less susceptible to electromagnetic force than the other mover. Therefore, since the first mover 341 and the second mover 351 can be driven individually, the first valve body 340 and the second valve body 350 can have different opening degrees with respect to their respective internal passages. As a result, the purge valve 3 can control the opening degree of each of the two valve bodies individually, and can adjust the purge flow rate of the evaporated fuel.
  • the housing internal passage includes a first internal passage 34a2 opened and closed by the first valve body 340 and a second internal passage 35a2 opened and closed by the second valve body 350.
  • the evaporative fuel flowing down the first internal passage 34a2 and the evaporative fuel flowing down the second internal passage 35a2 are configured to merge upstream of the outflow port 33a.
  • the first mover 341 and the second mover 351 are provided side by side so that the movable directions are coaxial. According to this configuration, it is possible to suppress the physique of the device in the direction orthogonal to the movable direction or the axial direction, and it is possible to provide the device in which the mounting space in the direction is suppressed.
  • first mover 341 and the second mover 351 are configured to operate in opposite directions in the valve closing operation. According to this configuration, the first valve 34 and the second valve 35 are loaded in opposite directions when the valves are closed. According to this load direction, the load related to the first valve 34 and the load related to the second valve 35 are likely to cancel each other out, which contributes to suppressing the vibration of the device.
  • one internal passage is a passage having a larger passage crossing area than the other internal passage.
  • the control device 50 controls the voltage applied to the solenoid unit 36 so as to execute the mode in the first increase rate region and the mode in the second increase rate region with respect to the increase in the flow rate of the evaporated fuel.
  • the other internal passage is opened in the mode of the first increase rate region, and the other internal passage and one internal passage are opened in the mode of the second increase rate region. According to this, it is possible to provide a flow rate control capable of suppressing noise caused by the fluttering of the ORVR valve 15 and increasing the flow rate.
  • the control device 50 controls the flow rate of the evaporated fuel flowing out from the outflow port 33a by executing the mode of the first increase rate region from the zero state and then executing the mode of the second increase rate region. According to this control, it is possible to provide a purge control valve device capable of learning the concentration of the evaporated fuel from the start of purging, suppressing the fluttering of the ORVR valve 15, and further exhibiting the large flow rate performance of purging thereafter.
  • the control device 50 controls the applied voltage to the solenoid unit 36 so that the mode of the first increase rate region is executed when the concentration learning of the evaporated fuel is performed. According to this control, the concentration learning of the evaporated fuel can be carried out in a state where the change in the flow rate is small. As a result, it is possible to provide a purge control valve device that can both suppress fluttering of the ORVR valve 15 and secure a large flow rate, and further improve the accuracy of concentration learning.
  • the control device 50 controls the voltage applied to the solenoid unit 36 so that the mode in the first increase rate range is executed when the noise generation condition in which noise can be assumed is satisfied. According to this control, the mode of the first increase rate region can be executed in a state where noise due to the fluttering of the ORVR valve 15 can be generated. As a result, it is possible to provide a purge control valve device that can suppress noise more efficiently and can also secure a large flow rate.
  • the control device 50 does not control in the first mode, which controls the duty ratio of the positive side voltage application or the negative side voltage application, and the positive side voltage application and the negative side voltage application in the AC signal voltage application. It switches over to a second mode that controls the duty ratio of the voltage application.
  • the first mode of increasing the duty ratio of voltage application to a valve having a mover containing a soft magnetic material and the duty ratio of voltage application to a valve having a mover containing a hard magnetic material are increased. It is possible to carry out the second mode to be carried out.
  • the valve opening rate can be increased for a valve having a mover containing a hard magnetic material, while the valve opening state can be maintained for a valve having a mover containing a soft magnetic material.
  • one internal passage is a passage formed with a passage crossing area larger than that of the other internal passage.
  • the purge valve 3 opens the other small internal passage in the first mode, and opens the other internal passage and one internal passage in the second mode. According to this, the mode of the first increase rate region can be executed in the first mode, and the mode of the second increase rate region can be executed in the second mode. Therefore, when shifting from the mode in the first increase rate region to the mode in the second increase rate region, it is possible to carry out purge flow rate control in which the flow rate of the evaporated fuel flowing out from the outflow port 33a does not fluctuate significantly.
  • the second embodiment will be described with reference to FIGS. 7 and 8.
  • the second embodiment differs from the first embodiment in the energization control applied to the solenoid unit 36.
  • the configurations, actions, and effects that are not particularly described in the second embodiment are the same as those in the first embodiment, and only the differences will be described below.
  • the purge valve 3 is controlled to the state shown in FIG. 3 when the mode of the first increase rate region in which the flow rate increase rate is small as shown in the graph of FIG. 8 is executed.
  • the purge valve 3 is configured so that the magnetic flux generated by the solenoid portion 36 when a negative voltage is applied attracts the magnetic flux of the mover containing the hard magnetic material.
  • the second mover 351 which is a permanent magnet and the magnetic flux acting on the core stator 362 and the second mover 351 by the magnetic circuit attract each other, the second mover 351 is the second valve seat.
  • the valve is opened apart from the portion 35a1.
  • the first valve 34 is opened at a ratio corresponding to the duty ratio of the positive side voltage, and the second valve 35 is closed regardless of the duty ratio.
  • the control device 50 executes energization control in which the duty ratio of the positive side voltage application is gradually increased from 0% to 100% as in the mode of the first increase rate region shown in FIG.
  • the valve opening rate of the first valve 34 increases, and the flow rate flowing down the first internal passage 34a2 increases.
  • the purge valve 3 is controlled to the state shown in FIG. 4 when the mode of the second increase rate region in which the flow rate increase rate is larger than the first increase rate region as shown in the graph of FIG. 8 is executed.
  • the control device 50 applies the electric power supplied from the power supply unit 51 to the coil unit 360 by controlling the duty ratio of the negative voltage.
  • the energization control in which the negative side voltage is applied is an energization control in which the application of the negative side voltage and the non-application of the negative side voltage are alternately repeated.
  • the second embodiment is configured so that the magnetic flux generated by the solenoid unit 36 when a negative voltage is applied attracts the magnetic flux of the mover containing the hard magnetic material. Since the first mover 341 contains a soft magnetic material, the first valve 34 opens at both the application time of the positive side voltage and the application time of the negative side voltage. Therefore, as shown in FIG. 8, the first valve 34 opens at the same timing as the second valve in the mode of the second increase rate region. The second valve 35 opens at a rate corresponding to the duty ratio of the negative voltage.
  • the control device 50 executes energization control in which the duty ratio of the negative voltage application is gradually increased from a predetermined value of X% to 100%, as in the mode of the second increase rate region. By this control, when the mode shifts to the second increase rate region mode after the first increase rate region mode, the flow rate flowing out from the purge valve 3 does not change significantly and continues to increase continuously.
  • the control device 50 executes the process according to the flowchart of FIG.
  • the flowchart shown in FIG. 7 starts when the evaporated fuel flows down toward the engine 2.
  • the control device 50 determines whether or not the concentration of the evaporated fuel is learned in step S200. If it is determined in step S200 that the concentration learning is being performed, the control device 50 determines in step S220 whether or not the second valve 35 is in the closed state. When it is determined in step S220 that the second valve 35 is in the closed state, the process returns to step S200 and the determination process of step S200 is executed. When it is determined in step S220 that the second valve 35 is not in the closed state, a positive voltage is applied to the coil portion 360 in step S225, and the determination process of step S200 is executed. The control device 50 executes a control in which the duty ratio of the positive voltage applied in step S225 is gradually increased from 0% to 100%.
  • step S210 determines whether or not the noise generation condition is satisfied in step S210.
  • the process in step S210 is the same as the process in step S110 of the first embodiment. For example, when the vehicle is stopped, the vehicle is running at a low speed, the engine 2 is idling, or the like, the control device 50 determines that the noise generation condition is satisfied in step S210. If it is determined in step S210 that the noise generation condition is satisfied, the process proceeds to step S220, and the determination process of step S220 is executed.
  • step S220 The flow of returning from step S220 to step S200 and the flow of returning to step S200 after executing step S225 implement the mode of the first increase rate range of FIG.
  • the mode of the first increase rate region it is possible to improve the concentration learning accuracy of the evaporated fuel, reduce the pulsation, reduce the fluttering of the ORVR valve 15, and the like, as in the first embodiment.
  • step S210 determines whether or not the noise generation condition is not satisfied. If it is determined in step S210 that the noise generation condition is not satisfied, the control device 50 determines whether or not the duty ratio of the positive side voltage has reached 100% in step S230. If it is determined in step S230 that the duty ratio of the positive voltage has not reached 100%, the process returns to step S200 and the determination process of step S200 is executed. When it is determined in step S230 that the duty ratio of the positive side voltage has reached 100%, it is determined in step S240 whether or not the second valve 35 is in the closed state.
  • step S240 If it is determined in step S240 that the second valve 35 is not in the closed state, the process returns to step S200 and the determination process of step S200 is executed.
  • the control device 50 applies a negative side voltage having a predetermined duty ratio to the coil portion 360 in step S250.
  • step S250 the control device 50 starts applying a negative voltage according to a duty ratio of X%, which is a predetermined value.
  • the control device 50 executes control in step S260 to gradually increase the duty ratio of the negative voltage from a predetermined value toward 100%, and returns to step S200.
  • steps S250 and S260 the fluid flow rate controlled by the purge valve 3 can be smoothly shifted from the first increase rate region to the second increase rate region as shown in FIG.
  • the mode of the second increase rate range shown in FIG. 8 is executed. Similar to the first embodiment, in the mode of the second increase rate range, in addition to the valve open state of the first valve 34, the valve open rate of the second valve 35 whose large flow rate can be adjusted is increased, so that the large flow rate is increased. Can be promoted. According to the control according to the flowchart of FIG. 7, as shown in FIG. 8, it is possible to provide the flow rate control capable of suppressing the noise caused by the fluttering of the ORVR valve 15 and increasing the flow rate.
  • the control device 50 switches between a positive voltage mode that controls the duty ratio of the positive voltage application and a negative voltage mode that controls the duty ratio of the negative voltage application.
  • the positive side voltage mode that increases the duty ratio of voltage application to the valve having the mover containing the soft magnetic material and the duty ratio of the voltage application to the valve having the mover containing the hard magnetic material are set. It is possible to carry out an increasing negative voltage mode.
  • the valve opening rate can be increased for a valve having a mover containing a hard magnetic material, while the valve opening state can be maintained for a valve having a mover containing a soft magnetic material.
  • the control device 50 controls so that the duty ratio of the applied voltage is increased in one of the positive side voltage mode and the negative side voltage mode.
  • the control device 50 controls the duty ratio of the applied voltage to increase from a predetermined value, which is a value larger than 0%, in the other mode. According to this, when shifting from the mode of the first increase rate region to the mode of the second increase rate region, it is possible to carry out purge flow rate control in which the flow rate of the evaporated fuel flowing out from the outflow port 33a does not fluctuate significantly.
  • the third embodiment will be described with reference to FIGS. 9 to 11.
  • the purge valve 103 of the third embodiment is different from the first embodiment in the first valve 134 and the second valve 135.
  • the configurations, actions, and effects that are not particularly described in the third embodiment are the same as those in the first embodiment, and only the differences will be described below.
  • the purge valve 103 includes a first valve 134 and a second valve 135 provided inside the housing.
  • the first valve 134 and the second valve 135 are arranged in parallel in the housing internal passage of the purge valve 103.
  • the first valve 134 and the second valve 135 are arranged so that the axial direction of the first valve body 340 and the axial direction of the second valve body 350 are aligned in the radial direction.
  • FIG. 9 shows that the first valve 134 and the second valve 135 are controlled in the closed state.
  • the purge valve 103 includes a first valve 134 that can adjust a small flow rate, and a second valve 135 that can adjust a large flow rate as compared with the first valve 134.
  • the control device 50 controls the operation of the first valve 134 and the second valve 135 by controlling the applied voltage.
  • the purge valve 103 has one solenoid unit 36, and energizes the solenoid unit 36 to form one electric circuit.
  • the first valve 134 and the second valve 135 are driven in the axial direction by using an electromagnetic driving force generated by a magnetic flux generated by a common electric circuit to open the valves, and open their respective passages.
  • the solenoid portion 36 includes a coil portion 360a and a coil portion 360b.
  • the coil portion 360a and the coil portion 360b are connected in series by a connecting portion 360c.
  • the solenoid unit 36 includes a coil unit 360, a bobbin 361a, a bobbin 361b, a core stator 362a, a core stator 362b, a yoke 1342, a yoke 1352, and the like.
  • the first valve 134 includes a coil portion 360a, a first mover 1341, a core stator 362a, a first spring 1343, a link portion 1344, and the like.
  • the coil portion 360a is wound around the bobbin 361a.
  • the central axis of the first mover 1341 corresponds to the central axis of the first valve 134.
  • the first mover 1341 and the yoke 1342 are connected by a link portion 1344.
  • the first spring 1343 provides an urging force that moves the first mover 1341 away from the core stator 362a.
  • the first spring 1343 provides an urging force that attempts to move the first mover 1341 toward the first valve seat portion 34a1.
  • the first valve body 340 is integrally provided at the axial end portion of the first mover 1341.
  • the second valve 135 includes a coil portion 360b, a second mover 1351, a core stator 362b, a second spring 1353, a link portion 1354, and the like.
  • the coil portion 360b is wound around the bobbin 361b.
  • the central axis of the second mover 1351 corresponds to the central axis of the second valve 135.
  • the second mover 1351 and the yoke 1352 are connected by a link portion 1354.
  • the second spring 1353 provides an urging force that moves the second mover 1351 away from the core stator 362b.
  • the second spring 1353 provides an urging force for moving the second mover 1351 toward the second valve seat portion 35a1.
  • the second valve body 350 is integrally provided at the axial end portion of the second mover 1351.
  • FIG. 10 shows that the first valve 134 is in the valve open state separated from the first valve seat portion 34a1, and the second valve 135 is in the valve closed state in which the second valve seat portion 35a1 is seated.
  • the broken line shown in FIG. 10 shows the magnetic circuit formed in the first valve 134.
  • the non-support portion 1341b located on one end side of the first mover 1341 is located closer to the core stator 362a than the support portion 1341a located on the other end side. This is because the non-support portion 1341b is attracted to the core stator 362a side by the electromagnetic force.
  • the purge valve 103 is controlled to the state shown in FIG. 10 when the mode of the first increase rate region in which the flow rate increase rate is small as shown in the graph of FIG. 6 is executed.
  • FIG. 11 shows that the first valve 134 is in the valve open state, and the second valve 135 is in the valve open state separated from the second valve seat portion 35a1.
  • the non-support portion 1351b located on one end side of the second mover 1351 is located closer to the core stator 362b than the support portion 1351a located on the other end side. This is because the non-support portion 1351b is attracted to the core stator 362b side by the electromagnetic force.
  • the purge valve 103 is controlled to the state shown in FIG. 11 when the mode of the second increase rate region in which the flow rate increase rate as shown in the graph of FIG. 6 is larger than that of the first increase rate region is executed.
  • 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.
  • 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 embodiment.
  • 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 energization control described in the second embodiment can be applied to the purge valve 103 of the third embodiment.
  • the operation and effect of the purge valve 103 are the same as those described in the second embodiment.
  • the first internal passage and the second internal passage may have a configuration in which the passage crossing areas are the same.
  • the first increase rate region and the second increase rate region shown in FIG. 6 and the like have a relationship in which the flow rate change rates are the same.
  • the first internal passage may have a larger passage crossing area than the second internal passage.
  • the flow rate change rate is larger in the first increase rate region.
  • the mover containing the hard magnetic material may be the first mover, and the mover containing the soft magnetic material may be the second mover.
  • the description in the above-described embodiment shall be read by exchanging the first mover and the second mover.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

Une soupape de purge (3) d'un dispositif de soupape de de commande de purge comprend une première soupape (34) qui est disposée à l'intérieur d'un boîtier et présente un premier corps de soupape (340) et une seconde soupape (35) présentant un second corps de soupape (350). La soupape de purge (3) comprend une section de solénoïde (36) qui est excitée pour former un circuit électrique. La première soupape (34) comprend un premier pointeau (341) entraîné conjointement avec le premier corps de soupape (340) en fonction d'une force électromagnétique générée par ledit circuit électrique. La seconde soupape (35) comprend un second pointeau (351) entraîné conjointement avec le second corps de soupape (350) en fonction d'une force électromagnétique générée par ledit circuit électrique. Du premier pointeau (341) et second pointeau (351), un pointeau présente un matériau magnétique dur et l'autre pointeau présente un matériau magnétique souple. Les deux pointeaux peuvent ainsi être entraînés par un circuit électrique.
PCT/JP2020/028787 2019-09-23 2020-07-28 Dispositif de soupape de commande de purge WO2021059724A1 (fr)

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JP2019-172397 2019-09-23
JP2019172397A JP7172933B2 (ja) 2019-09-23 2019-09-23 パージ制御弁装置

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10299936A (ja) * 1997-04-22 1998-11-13 Smc Corp ３位置バルブ
JP4611384B2 (ja) * 2005-08-12 2011-01-12 三菱電機株式会社 燃料蒸発ガス処理装置および電磁バルブ装置
WO2016106310A1 (fr) * 2014-12-22 2016-06-30 Eaton Corporation Soupape en ligne
US20170067572A1 (en) * 2014-03-19 2017-03-09 Bitron S.P.A. Bistable electric valve, in particular for a system for recovering petrol vapours in a motor vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10299936A (ja) * 1997-04-22 1998-11-13 Smc Corp ３位置バルブ
JP4611384B2 (ja) * 2005-08-12 2011-01-12 三菱電機株式会社 燃料蒸発ガス処理装置および電磁バルブ装置
US20170067572A1 (en) * 2014-03-19 2017-03-09 Bitron S.P.A. Bistable electric valve, in particular for a system for recovering petrol vapours in a motor vehicle
WO2016106310A1 (fr) * 2014-12-22 2016-06-30 Eaton Corporation Soupape en ligne

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