WO2021200887A1 - Système de purge et véhicule - Google Patents

Système de purge et véhicule Download PDF

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Publication number
WO2021200887A1
WO2021200887A1 PCT/JP2021/013440 JP2021013440W WO2021200887A1 WO 2021200887 A1 WO2021200887 A1 WO 2021200887A1 JP 2021013440 W JP2021013440 W JP 2021013440W WO 2021200887 A1 WO2021200887 A1 WO 2021200887A1
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WO
WIPO (PCT)
Prior art keywords
purge
pressure
time
valve
air
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Application number
PCT/JP2021/013440
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English (en)
Japanese (ja)
Inventor
徹 秋庭
史朗 池本
哲也 熊田
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いすゞ自動車株式会社
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Publication of WO2021200887A1 publication Critical patent/WO2021200887A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/16—Filtration; Moisture separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B41/00—Pumping installations or systems specially adapted for elastic fluids
    • F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs

Definitions

  • This disclosure relates to purge systems and vehicles.
  • air compressed by an air compressor is sent to an air dryer, and moisture and oil content in the compressed air in the air dryer is sent. Is removed, and the air from which water and oil have been removed is stored in the tank.
  • a desiccant is provided inside the air dryer, and the desiccant removes water and oil in the air flowing into the air dryer.
  • the air dryer disclosed in Patent Document 1 is provided with a purge valve, and when air is supplied to the purge valve from the tank, the purge valve is opened and the inside of the air dryer is opened to the atmosphere. As a result, when the dried air inside the air dryer moves toward the atmosphere, the desiccant is regenerated by removing the water and oil absorbed by the desiccant in the air dryer.
  • the desiccant When the desiccant is regenerated, dirty air is discharged to the outside of the air dryer, which pollutes the ground and surrounding air.
  • the bus stops at a fixed position such as a stop, so if the desiccant is regenerated while the bus is stopped, it is discharged during the regenerating process.
  • the fixed position is contaminated with the excess water and oil.
  • a sound is generated when air is discharged to the outside of the air dryer.
  • a pressure governor is provided in the pipe connecting the tank and the purge valve, and the pressure governor supplies air to the purge valve and supplies air according to the pressure in the tank. Is switching the stop of. That is, the frequency of the desiccant regeneration operation depended on the operation of the pressure governor.
  • the present disclosure has been made in consideration of the above points, and an object of the present disclosure is to provide a vehicle equipped with a purge system and a purge system that reduce the frequency of desiccant regeneration operations in an air dryer.
  • One aspect of the purge system of the present disclosure includes a main tank, a compressor for discharging air, a purge valve, an air dryer for supplying the air discharged from the compressor to the main tank, and the inside of the main tank.
  • the tank pressure which is the pressure of
  • the tank pressure is smaller than the first pressure value. Controlled in one of a first control mode in which the supply of the indicated pressure is stopped when the value drops to a value and a second control mode in which the supply of the indicated pressure is stopped regardless of the tank pressure.
  • the purge control valve to be operated and the purge control valve are controlled, that a predetermined operation is detected, and that the amount of air supplied to the air dryer by the compressor during a predetermined period is less than the first threshold value. That, and at least one of the time from the time when the purge control valve starts supplying the indicated pressure to the time when the purge control valve stops supplying the indicated pressure is equal to or longer than the reference time is satisfied.
  • a control unit for switching the control mode of the purge control valve from the first control mode to the second control mode is provided.
  • One aspect of the vehicle of the present disclosure comprises the purge system described above.
  • FIG. 1 is a diagram showing a main configuration of a purge system included in a vehicle according to an embodiment.
  • FIG. 2 is a diagram illustrating drive start and drive stop of the compressor executed by the purge system according to the embodiment.
  • FIG. 3 is a flowchart showing a control example of the purge control valve executed by the purge system according to the embodiment.
  • FIG. 4A is a diagram showing a purge control valve included in the purge system according to the first modification.
  • FIG. 4B is a diagram showing a purge control valve included in the purge system according to the first modification.
  • FIG. 5 is a diagram showing a main configuration of the purge system according to the second modification.
  • FIG. 1 is a diagram showing a main configuration of a purge system 1 included in a vehicle 100 according to an embodiment of the present disclosure.
  • the vehicle 100 will be described as being a large vehicle such as a bus or a truck.
  • the purge system 1 includes a compressor 11, a motor 12, an air dryer 13, a main tank 14, a purge control valve 16, a pressure sensor 17, a flow rate sensor 41, an open / close detection unit 42, an operation detection unit 43, an output unit 50, and a control unit 60. It has.
  • the compressor 11 discharges the sucked air at a desired flow rate, and supplies the discharged air to the air dryer 13.
  • the compressor 11 is an electric compressor driven by a motor 12.
  • the motor 12 drives the compressor 11 at a predetermined rotation speed under the control of the control unit 60.
  • the air dryer 13 removes water and oil contained in the air discharged from the compressor 11, and supplies the removed air to the main tank 14.
  • a desiccant D is arranged inside the air dryer 13.
  • the desiccant D absorbs water and oil in the air that has flowed into the air dryer 13.
  • the air dryer 13 includes a purge valve 131, and when an indicated pressure is supplied to the purge valve 131, a regeneration process of the desiccant D, a so-called purge process, is executed.
  • the indicated pressure is air that triggers the air dryer 13 to execute the purge process, and is supplied from the main tank 14.
  • the purge valve 131 When the indicated pressure is supplied to the purge valve 131, the purge valve 131 is opened and the inside of the air dryer 13 is opened to the atmosphere. Then, the dry air inside the air dryer 13 removes the water and oil components absorbed by the desiccant D when it is discharged to the atmosphere. As a result, the desiccant D is regenerated.
  • the main tank 14 stores air from which water and oil have been removed by the air dryer 13.
  • the air stored in the main tank 14 is supplied to air equipment (not shown) such as air brakes, air suspensions, equipment related to opening and closing doors, and equipment related to kneeling operation at appropriate timings.
  • the purge control valve 16 is a solenoid valve. It is provided in a pipe (hereinafter, referred to as an indicated pressure supply pipe) 21 connecting the main tank 14 and the purge valve 131.
  • the purge control valve 16 opens and closes the instruction pressure supply pipe 21 under the control of the control unit 60 to supply the instruction pressure from the main tank 14 to the purge valve 131 and stop the supply of the instruction pressure.
  • supplying the indicated pressure means supplying the air in the main tank 14 to the purge valve 131.
  • the indicated pressure is supplied to the purge valve 131 when the purge control valve 16 opens the indicated pressure supply pipe 21, and is not supplied to the purge valve 131 when the purge control valve 16 closes the indicated pressure supply pipe 21.
  • the purge control valve 16 is a directional valve, and when the indicated pressure supply pipe 21 is closed, the purge valve 131 communicates with the atmosphere.
  • the pressure sensor 17 is attached to the main tank 14.
  • the pressure sensor 17 measures the pressure inside the main tank 14 (hereinafter, referred to as tank pressure), and transmits the measured value D0 to the control unit 60.
  • the pressure sensor 17 may be provided in a pipe connecting the air dryer 13 and the main tank 14. Further, the pressure sensor 17 may be provided on the upstream side of the purge control valve 16 in the indicated pressure supply pipe 21.
  • the flow rate sensor 41 is provided in the pipe connecting the compressor 11 and the air dryer 13.
  • the flow rate sensor 41 measures the air flow rate in the pipe connecting the compressor 11 and the air dryer 13, that is, the flow rate of air from the compressor 11 to the air dryer 13, and transmits the measured value D1 to the control unit 60.
  • the flow rate sensor 41 is, for example, an instantaneous flow rate sensor that measures the instantaneous flow rate in the pipe connecting the compressor 11 and the air dryer 13, or a cumulative flow rate sensor that measures the cumulative flow rate in the pipe.
  • the open / close detection unit 42 is a door switch.
  • the open / close detection unit 42 detects the operation of opening the door (not shown) of the vehicle 100
  • the open / close detection unit 42 transmits an open signal S3 notifying that the operation of opening the door is detected to the control unit 60, and detects the operation of closing the door. If so, a closing signal S4 notifying that the operation to close the door is detected is transmitted to the control unit 60.
  • the operation detection unit 43 includes a purge stop button provided near the driver's seat of the vehicle 100.
  • the operation detection unit 43 transmits the operation detection signal S5 notifying that the operation instructing the purge stop is detected to the control unit 60.
  • the operation of instructing the purge stop is to press the purge stop button. Once pressed, the purge stop button remains pressed (that is, in the ON state). Then, when the purge cancel described later is canceled, the state can be automatically pressed again (that is, the OFF state).
  • the output unit 50 is a speaker, a display unit, or a device that combines a speaker and a display unit.
  • the output unit 50 is provided near the driver's seat of the vehicle 100, and under the control of the control unit 60, voice, screen display, and a voice, screen display, indicate that the purge process is being canceled and that the purge process is canceled. Alternatively, the occupant of the vehicle 100 is notified by a combination of voice and screen display.
  • canceling the purge process corresponds to the control unit 60 controlling the purge control valve 16 in the shutoff mode, and the control unit 60 cancels the cancellation of the purge process by the purge control valve 16.
  • the control unit 60 cancels the cancellation of the purge process by the purge control valve 16.
  • the cutoff mode corresponds to switching from cutoff mode to normal mode. The cutoff mode and the normal mode will be described in detail later.
  • the control unit 60 controls the entire purge system 1. More specifically, the control unit 60 controls the opening and closing of the purge control valve 16 and drives the motor 12 based on various signals S3, S4, S5, and the measured values D0 and D1. Control (that is, compressor drive control) is performed.
  • the control unit 60 has, for example, a storage medium such as a CPU (Central Processing Unit), a ROM (Read Only Memory) in which a control program is stored, and a working memory such as a RAM (Random Access Memory).
  • a storage medium such as a CPU (Central Processing Unit), a ROM (Read Only Memory) in which a control program is stored, and a working memory such as a RAM (Random Access Memory).
  • the operation of the purge system 1 is controlled by executing the control program.
  • Control of purge control valve The control unit 60 controls the purge control valve 16 in either a normal mode or a shutoff mode.
  • the indicated pressure supply pipe 21 is opened by the purge control valve 16 when the tank pressure reaches the pressure value Pt1, and the indicated pressure supply pipe 21 is purged when the tank pressure drops to the pressure value Pt2.
  • This is a control mode in which the block is closed by 16. Opening the instruction pressure supply pipe 21 by the purge control valve 16 corresponds to starting the supply of the instruction pressure, and closing the instruction pressure supply pipe 21 by the purge control valve 16 stops the supply of the instruction pressure.
  • the control unit 60 controls the purge control valve 16 based on the measured value D0 of the pressure sensor 17.
  • the pressure value Pt1 is larger than the pressure value Pt2.
  • the pressure value Pt1 is 900 kPa and the pressure value Pt2 is 800 kPa.
  • the pressure value Pt1 is the value of the pressure supplied from the main tank 14 to the purge valve 131, which is the value of the tank pressure when the filling rate of air in the main tank 14 is 100%.
  • the pressure value Pt2 is a pressure value that serves as a guide for executing the operation of supplying air to the air dryer 13 by the compressor 11.
  • the cutoff mode is a control mode that stops the supply of the indicated pressure regardless of the tank pressure.
  • the control mode is the shutoff mode, the control unit 60 maintains the instruction pressure supply pipe 21 blocked by the purge control valve 16.
  • the motor 12 may be rotated at a minute rotational speed instead of stopping the driving of the compressor 11. ..
  • the minute rotation speed is the rotation speed of the motor 12 that can drive the compressor 11 toward the air dryer 13 to the extent that air is not supplied. That is, when the control unit 60 determines that the measured value D0 of the pressure sensor 17 has reached the pressure value Pt1, the air supply to the air dryer 13 by the compressor 11 is stopped, and the measured value D0 of the pressure sensor 17 is the pressure value. If it is determined that the pressure has dropped to Pt2, the air supply to the air dryer 13 by the compressor 11 may be started. In the following description, when the control unit 60 determines that the measured value D0 of the pressure sensor 17 has reached the pressure value Pt1, the drive of the compressor 11 will be stopped.
  • FIG. 2 is a diagram illustrating drive start and drive stop of the compressor 11 executed by the purge system 1 according to the embodiment.
  • the upper graph of FIG. 2 shows the time change of the tank pressure. Note that P0 in the upper graph of FIG. 2 indicates atmospheric pressure.
  • the lower graph of FIG. 2 shows the timing at which the drive state (that is, ON state) and the drive stop state (that is, OFF state) of the compressor 11 are switched with time. At time T00, the compressor 11 is in the OFF state, and the purge control valve 16 is in the state of supplying the indicated pressure.
  • the tank pressure drops due to the use of air in the main tank 14 by each air device of the vehicle 100, and when the tank pressure drops to Pt2 at time T01, the control unit 60 determines the measured value D0 of the pressure sensor 17. It is determined that the pressure has decreased to Pt2. Then, at time T01, the control unit 60 starts driving the compressor 11 and closes the instruction pressure supply pipe 21 by the purge control valve 16. When the indicated pressure supply pipe 21 is closed, the supply of the indicated pressure to the purge valve 131 is stopped.
  • the control unit 60 determines that the measured value D0 of the pressure sensor 17 has reached Pt1. Then, at time T02, the control unit 60 stops the drive of the compressor 11 and opens the instruction pressure supply pipe 21 by the purge control valve 16. When the indicated pressure supply pipe 21 is opened, supply of the indicated pressure to the purge valve 131 is started.
  • the control unit 60 determines that the measured value D0 of the pressure sensor 17 has dropped to Pt2. Then, at time T03, the control unit 60 starts driving the compressor 11 and closes the instruction pressure supply pipe 21 by the purge control valve 16. When the indicated pressure supply pipe 21 is closed, the supply of the indicated pressure to the purge valve 131 is stopped.
  • the control unit 60 determines that the measured value D0 of the pressure sensor 17 has reached Pt1. Then, at time T04, the control unit 60 stops the drive of the compressor 11 and opens the instruction pressure supply pipe 21 by the purge control valve 16. When the indicated pressure supply pipe 21 is opened, supply of the indicated pressure to the purge valve 131 is started.
  • the purge control valve 16 supplies the indicated pressure and stops the supply of the indicated pressure according to the change in the tank pressure.
  • the purge control valve 16 starts supplying the indicated pressure from the time when the purge control valve 16 starts supplying the indicated pressure to the time when the purge control valve 16 starts supplying the indicated pressure again, or the purge control valve 16 starts supplying the indicated pressure.
  • One cycle is from the time when the supply of the indicated pressure is stopped to the time when the purge control valve 16 stops supplying the indicated pressure again. For example, in FIG. 2, the time from time T02 to time T04 corresponds to one cycle.
  • FIG. 3 is a flowchart showing a control example of the purge control valve 16 executed by the purge system 1 according to the embodiment. Before the process shown in FIG. 3 is started, the control unit 60 controls the purge control valve 16 in the normal mode.
  • the control unit 60 determines whether or not the purge stop button has been pressed (step S12). When the control unit 60 receives the operation detection signal S5 from the operation detection unit 43, the control unit 60 determines that the purge stop button has been pressed, and when the operation detection signal S5 has not been received from the operation detection unit 43, the purge stop button is pressed. Judge that it is not done. In the following description, pressing the purge stop button of the operation detection unit 43 may be referred to as an intention condition.
  • step S12 When it is determined that the purge stop button is pressed (YES in step S12), the control unit 60 is in the period from the start of the air supply by the compressor 11 to the stop of the air supply to the air dryer 13 by the compressor 11 (YES in step S12). Hereinafter, it is determined whether or not the air supply amount in the predetermined period) is smaller than the first flow rate threshold value (step S13).
  • the predetermined period corresponds to the period from the time when the tank pressure drops to Pt2 to the time when the tank pressure reaches Pt1 next, for example, from time T01 to time T02 in FIG.
  • the period is the period from time T03 to time T04.
  • the predetermined period corresponds to the time (that is, the driving time) from the start of the air supply to the air dryer 13 by the compressor 11 to the stop of the air supply by the compressor 11.
  • control unit 60 acquires the measured value D1 by the flow rate sensor 41 in the predetermined period, and calculates the cumulative air flow rate of the pipe connecting the compressor 11 and the air dryer 13 in the predetermined period based on the acquired measured value D1. Then, the calculated cumulative air flow rate is compared with the first flow rate threshold.
  • the cumulative air volume in the predetermined period corresponds to the air supply amount in the predetermined period.
  • the cumulative air volume of the pipe connecting the compressor 11 and the air dryer 13 is simply referred to as the cumulative air volume.
  • the first flow rate threshold is determined based on the permissible amount of air passing through the desiccant D. For example, when the allowable amount of air in the desiccant D is 300 L, 180 L, which is 60% of 300 L, may be determined as the first flow rate threshold value. The allowable amount of air passing through the desiccant D is determined based on the amount of water and oil that the desiccant D can absorb.
  • the amount of air supplied during the predetermined period is less than the first flow rate threshold value, it is assumed that the amount of air used in the main tank 14 by the various air devices of the vehicle 100 is relatively small.
  • the amount of air supplied during the predetermined period is equal to or greater than the first flow rate threshold value, it is assumed that the amount of air used in the main tank 14 by the various air devices of the vehicle 100 is relatively large.
  • the fact that the air supply amount for a predetermined period is smaller than the first flow rate threshold value is referred to as a supply amount stop condition (1).
  • control unit 60 When the air supply amount for a predetermined period is equal to or greater than the first flow rate threshold value (NO in step S13), the control unit 60 maintains the control mode of the purge control valve 16 in the normal mode (step S14), and proceeds to step S12.
  • control unit 60 switches the control mode of the purge control valve 16 from the normal mode to the shutoff mode (step S15).
  • the instruction pressure supply pipe 21 is closed by the purge control valve 16, so that the instruction pressure is not supplied to the purge valve 131, and the purge process is not executed in the air dryer 13.
  • control unit 60 determines the amount of air supplied to the air dryer 13 by the compressor 11 from the time when the indicated pressure from the main tank 14 is no longer supplied to the purge valve 131 (hereinafter, referred to as the indicated pressure stop time). 2 It is determined whether or not the flow rate threshold has been reached (step S16).
  • the indicated pressure stop time is the most recent time when the purge control valve 16 closes the indicated pressure supply pipe 21.
  • the control mode is switched to the cutoff mode while the purge control valve 16 is opening the indicated pressure supply pipe 21
  • the time when the cutoff mode is switched becomes the indicated pressure stop time.
  • the control mode is switched to the shutoff mode while the purge control valve 16 closes the indicated pressure supply pipe 21
  • the most recent time when the purge control valve 16 closes the indicated pressure supply pipe 21 in the normal mode that is, The most recent time when the tank pressure drops below Pt2 is the indicated pressure stop time.
  • the indicated pressure stop time is the time when the shutoff mode is switched. ..
  • the indicated pressure stop time is the latest time when the tank pressure drops to Pt2 or less. That is, it is time T03.
  • the control unit 60 acquires the measured value D1 by the flow rate sensor 41 from the indicated pressure stop time to the current time, and based on the acquired measured value D1, presses the compressor 11 and the air dryer 13 from the indicated pressure stop time to the current time.
  • the cumulative air flow rate of the connecting pipes is calculated, and the calculated cumulative air flow rate is compared with the second flow rate threshold.
  • the fact that the amount of air supplied to the air dryer 13 by the compressor 11 from the indicated pressure stop time reaches the second flow rate threshold value may be referred to as the supply amount release condition (1).
  • the second flow rate threshold is determined based on the permissible amount of air passing through the desiccant D. For example, when the allowable amount of air in the desiccant D is 300 L, 390 L, which is 130% of 300 L, may be determined as the second flow rate threshold value.
  • the second flow rate threshold value may be a value equal to or higher than the first flow rate threshold value.
  • the air supply amount from the indicated pressure stop time to the current time reaches the second flow rate threshold value, it means that the amount of water and oil that can be additionally absorbed by the desiccant D is very small.
  • the air supply amount from the indicated pressure stop time to the current time does not reach the second flow rate threshold value, it means that the desiccant D has a relatively large amount of water and oil that can be additionally absorbed.
  • step S16 When the amount of air supplied to the air dryer 13 by the compressor 11 from the indicated pressure stop time has not reached the second flow rate threshold value (NO in step S16), the control unit 60 sets the air supply amount to the second flow rate threshold value. The process of step S16 is repeated until the value is reached.
  • control unit 60 When the amount of air supplied to the air dryer 13 by the compressor 11 from the indicated pressure stop time reaches the second flow rate threshold value (YES in step S16), the control unit 60 normally changes the control mode of the purge control valve 16 from the shutoff mode. Switch to the mode (step S17).
  • the time when the control mode of the purge control valve 16 is switched from the shutoff mode to the normal mode (hereinafter referred to as the release time) is immediately after the time when the tank pressure reaches Pt1 and the tank pressure is Pt2.
  • the control unit 60 switches the control mode to the normal mode and causes the purge control valve 16 to open the instruction pressure supply pipe 21.
  • the control unit 60 sets the control mode to the normal mode. After the tank pressure reaches Pt1, the indicated pressure supply pipe 21 is opened by the purge control valve 16.
  • the control unit 60 may switch the control mode of the purge control valve 16 from the shutoff mode to the normal mode and open the instruction pressure supply pipe 21 by the purge control valve 16 regardless of the release time.
  • step S12 the indicated pressure supply pipe 21 is blocked by the purge control valve 16, so that the indicated pressure is not supplied to the purge valve 131, and the purge process is not executed in the air dryer 13.
  • the control unit 60 executes the process of step S12.
  • the control unit 60 determines whether or not the door of the vehicle 100 is open (step S18).
  • the control unit 60 receives the open signal S3 from the open / close detection unit 42 after the latest time when the close signal S4 is received, the control unit 60 determines that the door of the vehicle 100 has been opened and receives the close signal S4. If the open signal S3 has not been received after the latest time, it is determined that the door of the vehicle 100 remains closed.
  • the door of the vehicle 100 it is assumed that the vehicle 100 is stopped.
  • the fact that the door of the vehicle 100 is open may be referred to as a stop condition. It can be said that the operation of pressing the purge stop button and the operation of opening the door are predetermined operations for stopping the purge process.
  • the control unit 60 determines whether or not the latest purge time is equal to or longer than the reference time (step S19).
  • the purge time is the time when the purge control valve 16 starts supplying the indicated pressure to the purge valve 131 (that is, the time when the tank pressure reaches Pt1) and the time when the supply of the indicated pressure is stopped (that is, the tank pressure is Pt2). It is the time until just before (the time when it decreased below).
  • the purge time is the time from time T02 to immediately before time T03 in FIG.
  • the purge time is measured by the control unit 60.
  • the fact that the latest purge time is equal to or longer than the reference time is referred to as a purge time condition.
  • the reference time is determined based on the guideline of the execution time of the purge process per cycle. For example, when the guideline of the execution time of the purge process is 60 seconds, the reference time may be determined to be 60 seconds or 90 seconds, which is a value of 150% of the guideline.
  • the latest purge time is longer than the reference time, it is assumed that the water and oil in the desiccant D have been sufficiently removed.
  • the purging time is less than the reference time, it is assumed that the tank pressure drops to Pt2 or less and the purging process is completed in a situation where the water and oil content of the desiccant D is not sufficiently removed.
  • step S19 When the purge time is less than the reference time (NO in step S19), the control unit 60 maintains the control mode of the purge control valve 16 in the normal mode (step S14), and proceeds to step S12.
  • control unit 60 determines whether or not the amount of air supplied during the predetermined period described above is less than the third flow rate threshold value (step S20).
  • control unit 60 acquires the measured value D1 by the flow rate sensor 41 in the predetermined period, and calculates the cumulative air flow rate of the pipe connecting the compressor 11 and the air dryer 13 in the predetermined period based on the acquired measured value D1. , The calculated cumulative air flow rate is compared with the third flow rate threshold.
  • the fact that the air supply amount for a predetermined period is smaller than the third flow rate threshold value may be referred to as a supply amount stop condition (2).
  • the third flow rate threshold is determined based on the permissible amount of air passing through the desiccant D. For example, when the allowable amount of air in the desiccant D is 300 L, 90 L, which is 30% of 300 L, may be determined as the third flow rate threshold value.
  • the third flow rate threshold value may be a value equal to or less than the first flow rate threshold value.
  • the third flow rate threshold value may be the same value as the first flow rate threshold value, in which case the supply amount stop conditions (1) and (2) are the same as each other.
  • control unit 60 When the air supply amount for a predetermined period is equal to or greater than the third flow rate threshold value (NO in step S20), the control unit 60 maintains the control mode of the purge control valve 16 in the normal mode (step S14), and proceeds to step S12.
  • control unit 60 switches the control mode of the purge control valve 16 from the normal mode to the shutoff mode (step S21).
  • the instruction pressure supply pipe 21 is closed by the purge control valve 16, so that the instruction pressure is not supplied to the purge valve 131, and the purge process is not executed in the air dryer 13.
  • control unit 60 determines whether or not the amount of air supplied to the air dryer 13 by the compressor 11 from the indicated pressure stop time has reached the fourth flow rate threshold value (step S22).
  • the control unit 60 acquires the measured value D1 by the flow rate sensor 41 from the indicated pressure stop time to the current time, and based on the acquired measured value D1, presses the compressor 11 and the air dryer 13 from the indicated pressure stop time to the current time.
  • the cumulative air flow rate of the connecting pipes is calculated, and the calculated cumulative air flow rate is compared with the fourth flow rate threshold.
  • the fact that the amount of air supplied to the air dryer 13 by the compressor 11 from the indicated pressure stop time reaches the fourth flow rate threshold value may be referred to as the supply amount release condition (2).
  • the fourth flow rate threshold is determined based on the permissible amount of air passing through the desiccant D.
  • the fourth flow rate threshold value may be a value equal to or higher than the third flow rate threshold value. In the present embodiment, it is assumed that the fourth flow rate threshold value is the same value as the third flow rate threshold value. Further, the fourth flow rate threshold value may be a value equal to or less than the second flow rate threshold value.
  • the fourth flow rate threshold value may be the same value as the second flow rate threshold value, and in this case, the supply amount release conditions (1) and (2) are the same as each other.
  • the air supply amount from the indicated pressure stop time to the current time reaches the fourth flow rate threshold value, it means that the amount of water and oil that can be additionally absorbed by the desiccant D is reduced.
  • the air supply amount from the indicated pressure stop time to the current time does not reach the fourth flow rate threshold value, it means that the desiccant D has a margin in the amount of water and oil that can be additionally absorbed.
  • step S22 When the amount of air supplied to the air dryer 13 by the compressor 11 from the indicated pressure stop time has not reached the fourth flow rate threshold value (NO in step S22), the control unit 60 sets the air supply amount to the fourth flow rate threshold value. The process of step S22 is repeated until the value is reached.
  • step S22 When the amount of air supplied to the air dryer 13 by the compressor 11 from the indicated pressure stop time reaches the fourth flow rate threshold value (YES in step S22), the control unit 60 normally changes the control mode of the purge control valve 16 from the shutoff mode. Switch to the mode (step S23). As a result, the instruction pressure supply pipe 21 is closed by the purge control valve 16, so that the instruction pressure is not supplied to the purge valve 131, and the purge process is not executed in the air dryer 13. After that, the control unit 60 executes the process of step S12.
  • step S18 When it is determined that the door of the vehicle 100 is open (YES in step S18), the control unit 60 switches the control mode of the purge control valve 16 from the normal mode to the shutoff mode (step S21). As a result, the instruction pressure supply pipe 21 is closed by the purge control valve 16, so that the instruction pressure is not supplied to the purge valve 131, and the purge process is not executed in the air dryer 13. Subsequently, the control unit 60 moves to the process of step S22.
  • the control unit 60 switches the control mode of the purge control valve 16 from the normal mode to the shutoff mode (steps S15 and S21), and notifies the occupant of the vehicle 100 that the purge process is being canceled through the output unit 50.
  • control unit 60 may announce through the output unit 50 that the purge process is being canceled, or may display a screen displaying characters indicating that the purge process is being canceled, or announce. And screen display may be used together for notification.
  • control unit 60 switches the control mode of the purge control valve 16 from the shutoff mode to the normal mode (steps S17 and S23), and notifies the occupants of the vehicle 100 that the purge cancellation has been canceled through the output unit 50. ..
  • the control unit 60 may announce that the purge cancellation has been canceled through the output unit 50, or may display a screen for displaying characters indicating that the purge cancellation has been canceled, or the announcement and the screen. Notification may be performed in combination with the display.
  • control unit 60 may give a notification regarding purge cancellation through the output unit 50 as shown below.
  • the purge stop button is pressed (ON state)
  • the control mode of the purge control valve 16 cannot be switched to the shutoff mode, and the normal mode is maintained, the purge process cannot be stopped.
  • a second color for example, green
  • the control shown in the flowchart of FIG. 3 is a control in which the control unit 60 determines a stop condition when the intention condition is not satisfied. However, the control unit 60 determines the stop condition regardless of whether or not the intention condition is satisfied, and when the stop condition is satisfied, the purge control valve 16 can close the instruction pressure supply pipe 21. ..
  • the control unit 60 gives an instruction pressure to the purge control valve 16.
  • the supply pipe 21 can be closed.
  • the purge stop button functions as an absolute purge stop button.
  • control unit 60 can determine whether or not the supply amount stop condition (1) is satisfied by a method other than calculating the air supply amount based on the measured value D1 by the flow rate sensor 41.
  • the control unit 60 measures the time from the time when the tank pressure drops to Pt2 to the time when the tank pressure reaches Pt1 next, and compares the measured time with the first threshold time.
  • the first threshold time is determined based on the permissible amount of air passing through the desiccant D and the air supply speed of the compressor 11. For example, when the allowable amount of air in the desiccant D is 300 L and the air supply speed of the compressor 11 is 150 L / min, 1 minute and 12 seconds may be determined as the first threshold time. Note that 1 minute and 12 seconds is the time required for 180 L of air from the compressor 11 to be supplied to the air dryer 13.
  • the driving time is shorter than the first threshold time, it is assumed that the amount of air used in the main tank 14 by the various air devices of the vehicle 100 is relatively small.
  • the amount of air supplied during the driving time is equal to or longer than the first threshold time, it is assumed that the amount of air used in the main tank 14 by the various air devices of the vehicle 100 is relatively large.
  • the air supply amount from the compressor 11 to the air dryer 13 in a predetermined period becomes the first flow rate. It can be determined whether or not it is less than the threshold value, that is, whether or not the supply amount stop condition (1) is satisfied.
  • the control unit 60 measures the drive time of the compressor 11, and based on the measured time and the air supply speed of the compressor 11 when the compressor 11 supplies air to the air dryer 13, the cumulative air flow during the drive time is based on the measured time. Calculate the amount (that is, the amount of air supplied). Then, when the calculated cumulative air flow rate is smaller than the first flow rate threshold value, the control unit 60 can determine that the supply amount stop condition (1) is satisfied. In this way, by calculating the air supply amount based on the drive time of the compressor 11 and the air supply speed of the compressor 11, the control unit 60 controls the compressor while the compressor 11 supplies air to the air dryer 13. Even when the air supply speed of No.
  • the drive start time of the compressor 11 is T11
  • the drive stop time T12 of the compressor 11 is 2 minutes after the time T11
  • the air supply speed of the compressor 11 from the time T11 to the time T13 one minute later is 100 L /
  • the control unit 60 can calculate the amount of air supplied during the driving time as 250L (100L + 150L).
  • the air supply speed depends on the rotation speed of the motor 12 that drives the compressor 11.
  • control unit 60 can determine whether or not the supply amount stop condition (2) is satisfied by a method other than calculating the air supply amount based on the measured value D1 by the flow rate sensor 41. ..
  • the control unit 60 measures the time from the time when the tank pressure drops to Pt2 to the time when the tank pressure reaches Pt1 next, and compares the measured time with the first threshold time.
  • the second threshold time is determined based on the permissible amount of air passing through the desiccant D and the air supply speed of the compressor 11. For example, when the allowable amount of air in the desiccant D is 300 L and the air supply speed of the compressor 11 is 150 L / min, 36 seconds may be determined as the second threshold time. 36 seconds is the time required for 90 L of air from the compressor 11 to be supplied to the air dryer 13.
  • the air supply amount from the compressor 11 to the air dryer 13 in a predetermined period becomes the third flow rate. It can be determined whether or not it is less than the threshold value.
  • the control unit 60 measures the drive time of the compressor 11, and based on the measured time and the air supply speed of the compressor 11 when the compressor 11 supplies air to the air dryer 13, the cumulative air flow during the drive time is based on the measured time. Calculate the amount (that is, the amount of air supplied). Then, when the calculated cumulative air flow rate is smaller than the third flow rate threshold value, the control unit 60 can determine that the supply amount stop condition (2) is satisfied.
  • control unit 60 when the control unit 60 satisfies the supply amount release condition (1) or the supply amount release condition (2), the control unit 60 normally sets the control mode of the purge control valve 16. Switching to mode. However, the control unit 60 can switch the control mode of the purge control valve 16 to the normal mode when any one of the number of times condition and the traveling condition shown below is satisfied.
  • the number of times condition is that the number of times counted from the indicated pressure stop time (hereinafter referred to as the number of times of counting) is equal to or greater than the threshold number of times.
  • the number of counts is the number of times the tank pressure drops from Pt1 to Pt2 after the indicated pressure stop time, or the number of times the tank pressure rises from Pt2 to Pt1 after the indicated pressure stop time.
  • the control unit 60 can switch the control mode of the purge control valve 16 to the normal mode when the number of counts from the indicated pressure stop time to the current time is equal to or greater than the threshold number. When the number of counts from the indicated pressure stop time to the current time is less than the threshold number, the control unit 60 can maintain the shutoff mode without switching the control mode of the purge control valve 16.
  • the number of counts is counted by the control unit 60, and the control unit 60 decreases the tank pressure after reaching a value of Pt1 or more and becomes 1 when the tank pressure becomes Pt2 or less at a time after the indicated pressure stop time. Count times. Then, when the tank pressure changes from a value of Pt2 or less to a value of Pt1 or more, and the tank pressure drops from a value of Pt1 or more to a value of Pt2 or less, the count is performed once more. Alternatively, the control unit 60 counts once when the tank pressure reaches a value of Pt2 or less and then increases and becomes Pt1 or more at a time after the indicated pressure stop time.
  • the control unit 60 counts once every time the instruction pressure supply pipe 21 should be closed.
  • control unit 60 determines whether or not the number of counts has reached the threshold number at the current time.
  • the threshold number is, for example, two times.
  • the threshold number When the number of counts reaches the threshold number, it means that the period during which the purge control valve 16 does not supply the indicated pressure to the purge valve 131 is prolonged. That is, it can be considered that the desiccant D absorbs a considerable amount of water and oil. On the other hand, when the number of counts has not reached the threshold number, the period during which the purge control valve 16 does not supply the indicated pressure to the purge valve 131 is not so long, and the desiccant D contains additional absorbable water and oil. It can be considered that the amount is relatively large.
  • the threshold number is determined when the control mode of the purge control valve 16 is switched to the shutoff mode because the intention condition is satisfied, and when the intention condition is not satisfied but other conditions are satisfied and the purge control is performed.
  • the values may be different from each other depending on whether the control mode of the valve 16 is switched to the shutoff mode.
  • the driving condition is that the door of the vehicle 100 is closed.
  • the control unit 60 receives the close signal S4 from the open / close detection unit 42 after the latest time when the open signal S3 is received, the control unit 60 determines that the door of the vehicle 100 has been closed, and after the latest time when the open signal S3 is received. If the closing signal S4 is not received, it is determined that the door of the vehicle 100 remains open.
  • the control unit 60 determines that the door of the vehicle 100 is closed, the control unit 60 maintains the control of the purge control valve 16 in the shutoff mode for a certain period of time (for example, several seconds) from the time when the closing signal S4 is received, and keeps the control unit 60 constant.
  • control mode of the purge control valve 16 is switched to the normal mode, and when it is determined that the door of the vehicle 100 remains open, the control unit 60 switches the control mode of the purge control valve 16 to the normal mode. Can be maintained in cutoff mode.
  • the control mode of the purge control valve 16 is switched to the normal mode, so that the purge process is stopped after waiting for the vehicle 100 to travel. It can be released. Therefore, it is possible to prevent pollution of the stop position of the vehicle 100 and the air around it due to the purging process being executed while the vehicle 100 is stopped.
  • control unit 60 determines whether or not the supply amount release condition (1) is satisfied by a method other than calculating the air supply amount from the indicated pressure stop time based on the measured value D1 by the flow rate sensor 41. can do.
  • the control unit 60 starts measuring the time from the indicated pressure stop time, and determines whether or not the current time has passed the first predetermined time from the indicated pressure stop time.
  • the first predetermined time is determined based on the permissible amount of air passing through the desiccant D and the air supply speed of the compressor 11. For example, when the allowable amount of air in the desiccant D is 300 L and the air supply speed of the compressor 11 is 150 L / min, 2 minutes and 36 seconds may be determined as the first predetermined time. Note that 2 minutes and 36 seconds is the time required for the air of 390 L from the compressor 11 to be supplied to the air dryer 13.
  • the air supply amount from the compressor 11 to the air dryer 13 in the predetermined period becomes the second flow rate threshold value. It can be determined whether or not it is less than.
  • the control unit 60 determines the amount of air supplied from the indicated pressure stop time based on the time elapsed from the indicated pressure stop time and the air supply speed of the compressor 11 when the compressor 11 is supplying air to the air dryer 13. calculate.
  • the indicated pressure stop time is T21
  • the time T22 2 minutes after the time T21 is the current time
  • the air supply speed from the time T21 to the time T23 1 minute after the time T21 is 100 L / min
  • the time T23 It is assumed that the air supply speed of the compressor 11 for 1 minute from to time T22 is 150 L / min.
  • control unit 60 can calculate the air supply amount from the indicated pressure stop time to the current time as 250L (100L + 150L). Then, when the calculated air supply amount reaches the second flow rate threshold value, the control unit 60 can determine that the supply amount release condition is satisfied.
  • control unit 60 determines whether or not the supply amount release condition (2) is satisfied by a method other than calculating the air supply amount from the indicated pressure stop time based on the measured value D1 by the flow rate sensor 41. can do.
  • the control unit 60 starts measuring the time from the indicated pressure stop time, and determines whether or not the current time has passed the second predetermined time from the indicated pressure stop time.
  • the second predetermined time is determined based on the permissible amount of air passing through the desiccant D and the air supply speed of the compressor 11. For example, when the allowable amount of air in the desiccant D is 300 L and the air supply speed of the compressor 11 is 150 L / min, 2 minutes and 36 seconds may be determined as the second predetermined time. Note that 2 minutes and 36 seconds is the time required for the air of 390 L from the compressor 11 to be supplied to the air dryer 13.
  • the air supply amount from the compressor 11 to the air dryer 13 in the second predetermined time becomes the fourth. It can be determined whether or not it is less than the flow rate threshold.
  • the control unit 60 determines the amount of air supplied from the indicated pressure stop time based on the time elapsed from the indicated pressure stop time and the air supply speed of the compressor 11 when the compressor 11 is supplying air to the air dryer 13. calculate. When the calculated air supply amount reaches the fourth flow rate threshold value, the control unit 60 can determine that the supply amount release condition is satisfied.
  • the control unit 60 tanks when at least one of the intention condition, the supply amount stop condition (1) and (2), the stop condition, and the purge time condition is satisfied.
  • the purge control valve 16 in the control mode (cutoff mode) in which the indicated pressure supply pipe 21 is closed regardless of the pressure, the indicated pressure is prevented from being supplied to the purge valve 131. Therefore, the frequency of the purging process (that is, the regeneration operation of the desiccant D) in the air dryer 13 can be reduced.
  • the purge system 1 of the present embodiment does not have a governor, the space occupied by the purge system 1 when the purge system 1 is mounted on the vehicle 100 can be reduced.
  • the purge system 1 of the present embodiment is provided with a pressure sensor 17 and a purge control valve 16 instead of being provided with a governor, and by controlling the purge control valve 16 in the normal mode, the air dryer 13 periodically performs the purge system 1.
  • the purge process can be performed.
  • control unit 60 can switch the control mode of the purge control valve 16 to the shutoff mode, so that the occupant of the vehicle 100 can execute the purge process at an arbitrary timing. Therefore, for example, when traveling in a residential area or alley in the early morning or late at night, or when it is not desired to generate a sound associated with the purging process such as when leaving or entering the garage, the occupant of the vehicle 100 may stop the purging process. can.
  • the control unit 60 can switch the control mode of the purge control valve 16 to the shutoff mode, so that the water content and oil content of the desiccant D of the air dryer 13 can be switched.
  • the purging process can be stopped in consideration of the amount that can be absorbed. Therefore, the purge process can be stopped while reducing the load on each device of the vehicle 100.
  • the load on each device of the vehicle 100 is that, for example, the piping connecting the air dryer 13 and the main tank 14 or the piping connecting the main tank 14 and each air device freezes, and the piping is blocked. Since the desiccant D cannot absorb the moisture any more, air containing a large amount of moisture is supplied to the main tank 14 and causes the main tank 14 to freeze. Further, the load in each device of the vehicle 100 includes that the piping, the main tank 14, and the like are rusted, and that the purge control valve 16 and the like do not operate normally.
  • the control unit 60 can switch the control mode of the purge control valve 16 to the shutoff mode, so that the purge process can be stopped when the vehicle 100 is stopped. Therefore, the ground and its surroundings at a specific position such as a parking lot, a garage, a factory, and an entrance where the vehicle 100 is stopped due to the discharge of water and oil and air containing them due to the purging process. It is possible to prevent the air from being polluted.
  • control unit 60 can switch the control mode of the purge control valve 16 to the shutoff mode, and is based on whether or not the desiccant D has been sufficiently regenerated.
  • the purging process can be stopped. Therefore, the purge process can be stopped while reducing the load on each device of the vehicle 100.
  • the control unit 60 can switch the control mode of the purge control valve 16 to the shutoff mode on condition that both the intention condition and the supply amount stop condition (1) are satisfied. As a result, even if the occupant of the vehicle 100 desires to stop the purging process, the supply of the indicated pressure is not stopped unless the supply amount stop condition (1) is satisfied. Therefore, not only the intention of the occupant of the vehicle 100 but also The purge process can be stopped in consideration of the load on each device of the vehicle 100.
  • the control unit 60 sets the control mode of the purge control valve 16 when any of the supply amount release condition (1), the supply amount release condition (2), and the number of times condition is satisfied. You can switch to normal mode. As a result, the indicated pressure supply pipe 21 is opened by the purge control valve 16 by the time when the tank pressure reaches Pt1 next time after the control mode is switched to the normal mode at the latest. If the period during which the purging process is not performed is prolonged, the desiccant D cannot absorb water and oil, and a load is applied to each device of the vehicle 100 such as the main tank 14. According to the present embodiment, it is possible to prevent the period during which the purging process is not performed from being prolonged, and to reduce the load on each device of the vehicle 100 due to the suspension of the purging process.
  • FIG. 4A is a diagram showing a purge control valve 16 included in the purge system 1 according to the first modification, showing the purge system 1 in a state where the instruction pressure supply pipe 21 is open.
  • FIG. 4B is a diagram showing a purge control valve 16 included in the purge system 1 according to the first modification, showing the purge system 1 in a state where the instruction pressure supply pipe 21 is closed.
  • the purge control valve 16 is provided in a first valve 161 provided in the indicated pressure supply pipe 21 and a second valve provided in a pipe 22 (hereinafter, referred to as an air open pipe) that communicates the purge valve with the atmosphere. It may be composed of 162. When the second valve 162 opens the air opening pipe 22, the purge valve 131 communicates with the atmosphere.
  • the first valve 161 and the second valve 162 are valves for switching between opening and closing of the pipe.
  • the control unit 60 opens the instruction pressure supply pipe 21 by the first valve at the timing of opening the instruction pressure supply pipe 21, and closes the atmosphere release pipe 22 by the second valve (see FIG. 4A). Further, the control unit 60 closes the instruction pressure supply pipe 21 by the first valve at the timing of closing the instruction pressure supply pipe 21, and opens the atmosphere release pipe 22 by the second valve (see FIG. 4B).
  • FIG. 5 is a diagram showing a main configuration of the purge system 1 according to the second modification.
  • the purge control valve 16 is arranged inside the air dryer 13.
  • the instruction pressure supply pipe 21 connects the pipe that supplies the air of the air dryer 13 to the main tank 14 (hereinafter, referred to as a tank upstream pipe) and the purge valve 131 via the purge control valve 16. That is, in the second modification, the indicated pressure is supplied to the purge valve 131 via the tank upstream pipe and the indicated pressure supply pipe 21.
  • the control content of the purge control valve 16 is the same as that of the above-described embodiment, and according to the purge system 1 according to the second modification, the same effect as that of the embodiment can be obtained. Further, the purge control valve 16 of the modification 2 may also be composed of a plurality of on-off valves as shown in the modification 1.
  • control unit 60 may change the supply speed of the compressor 11. That is, the control unit 60 may change the rotation speed of the motor 12.
  • control unit 60 may stop the air supply by the compressor 11 when the measured value D0 of the tank pressure by the pressure sensor 17 reaches a predetermined pressure value smaller than the limit value.
  • the control unit 60 switches the control mode of the purge control valve 16 from the normal mode to the shutoff mode, and the humidity inside the air dryer 13 becomes another predetermined humidity.
  • the control mode of the purge control valve 16 may be switched from the shutoff mode to the normal mode.
  • another predetermined humidity is larger than the predetermined humidity.
  • a flow velocity sensor may be provided instead of the flow rate sensor 41.
  • the flow velocity sensor measures the flow velocity of the air passing through the pipe of the flow velocity sensor and transmits the measured value to the control unit 60.
  • the control unit 60 determines the measured value and the cross-sectional area of the pipe of the flow velocity sensor. Based on this, the cumulative air flow rate (that is, the air supply amount) can be calculated.
  • the purge system 1 of the present disclosure may have a configuration in which air is sent not only to the purge valve 131 but also to the compressor 11 by the operation of the purge control valve 16.
  • the compressor 11 does not necessarily have to be an electric compressor, and may be a compressor that operates in conjunction with the operation of a drive source such as an engine.
  • the vehicle 100 has been described as a large vehicle in the above-described embodiment, any vehicle may be used as long as it is equipped with a device that uses air.
  • the vehicle 100 may be, for example, an electric vehicle or an engine vehicle.
  • a purge system having a configuration in which the indicated pressure is supplied to the compressor 11 side can be mounted on an engine vehicle.
  • purge system 1 described above may be mounted not only on the vehicle 100 but also on any device that uses air.
  • the present disclosure can be suitably applied to a purge system that regenerates a desiccant in an air dryer by a purge process.
  • Purge system 11 Compressor 12 Motor 13 Air dryer 131 Purge valve 14 Main tank 16 Purge control valve 161 First valve 162 Second valve 17 Pressure sensor 21 Instructed pressure supply pipe 22 Air release pipe 41 Flow sensor 42 Open / close detection unit 43 Operation detection Part 50 Output part 60 Control part 100 Vehicle S3 Open signal S4 Close signal S5 Operation detection signal D0, D1 Measured value

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

Ce système de purge est pourvu d'un sécheur d'air qui possède une soupape de purge, une soupape de commande de purge qui est commandée dans l'un ou l'autre d'un premier mode de commande dans lequel l'alimentation en pression d'instruction vers la soupape de purge est démarrée lorsque la pression de réservoir qui est la pression à l'intérieur d'un réservoir principal atteint une première valeur de pression et est arrêtée lorsque ladite pression de réservoir chute jusqu'à une seconde valeur de pression inférieure à la première valeur de pression et d'un second mode de commande dans lequel ladite alimentation en pression d'instruction est arrêtée, et une unité de commande qui effectue une commutation du premier mode de commande au second mode de commande lorsqu'au moins l'un des événements suivants se produit : une opération prescrite a été détectée ; une quantité d'alimentation en air pendant une période prescrite devient inférieure à une première valeur de seuil ; et la durée, entre le moment où l'alimentation en pression d'instruction est démarrée et le moment où l'alimentation en pression d'instruction est arrêtée, devient égale ou supérieure à une période de référence.
PCT/JP2021/013440 2020-03-30 2021-03-30 Système de purge et véhicule WO2021200887A1 (fr)

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JP2020060513A JP2021155010A (ja) 2020-03-30 2020-03-30 パージシステムおよび車両
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01174031U (fr) * 1988-05-26 1989-12-11
JPH0470567U (fr) * 1990-10-31 1992-06-23
JPH0660425U (ja) * 1993-01-27 1994-08-23 日野自動車工業株式会社 車両用空気貯蔵装置
JP2000051637A (ja) * 1998-08-07 2000-02-22 Nissan Diesel Motor Co Ltd エアドライヤのパージコントロール装置
JP2004526628A (ja) * 2001-05-31 2004-09-02 ワブコ オートモーティブ ユーケー リミテッド 空気乾燥機の再生
JP2010221110A (ja) * 2009-03-23 2010-10-07 Nabtesco Automotive Corp 車両用圧縮空気供給装置
JP2013099720A (ja) * 2011-11-09 2013-05-23 Hino Motors Ltd エア供給システム
JP2015051697A (ja) * 2013-09-06 2015-03-19 日野自動車株式会社 エア供給システム

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01174031U (fr) * 1988-05-26 1989-12-11
JPH0470567U (fr) * 1990-10-31 1992-06-23
JPH0660425U (ja) * 1993-01-27 1994-08-23 日野自動車工業株式会社 車両用空気貯蔵装置
JP2000051637A (ja) * 1998-08-07 2000-02-22 Nissan Diesel Motor Co Ltd エアドライヤのパージコントロール装置
JP2004526628A (ja) * 2001-05-31 2004-09-02 ワブコ オートモーティブ ユーケー リミテッド 空気乾燥機の再生
JP2010221110A (ja) * 2009-03-23 2010-10-07 Nabtesco Automotive Corp 車両用圧縮空気供給装置
JP2013099720A (ja) * 2011-11-09 2013-05-23 Hino Motors Ltd エア供給システム
JP2015051697A (ja) * 2013-09-06 2015-03-19 日野自動車株式会社 エア供給システム

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