WO2002014676A1 - Procede de commande de vanne de recirculation des gaz d'echappement - Google Patents

Procede de commande de vanne de recirculation des gaz d'echappement Download PDF

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Publication number
WO2002014676A1
WO2002014676A1 PCT/JP2000/005480 JP0005480W WO0214676A1 WO 2002014676 A1 WO2002014676 A1 WO 2002014676A1 JP 0005480 W JP0005480 W JP 0005480W WO 0214676 A1 WO0214676 A1 WO 0214676A1
Authority
WO
WIPO (PCT)
Prior art keywords
control
valve
motor
deviation
value
Prior art date
Application number
PCT/JP2000/005480
Other languages
English (en)
Japanese (ja)
Inventor
Satoshi Kawamura
Sotsuo Miyoshi
Toshihiko Miyake
Youichi Fujita
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to JP2002519785A priority Critical patent/JP4480938B2/ja
Priority to PCT/JP2000/005480 priority patent/WO2002014676A1/fr
Publication of WO2002014676A1 publication Critical patent/WO2002014676A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
    • G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • F02M26/54—Rotary actuators, e.g. step motors
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/45—Sensors specially adapted for EGR systems
    • F02M26/48—EGR valve position sensors
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators

Definitions

  • the present invention relates to an exhaust gas recirculation system provided in an exhaust gas recirculation system.
  • FIG. 1 is a configuration diagram in which a control valve 11 of an EGR valve is disposed in an exhaust gas recirculation passage c that connects an exhaust passage a and an intake passage b of an engine E.
  • the control device of the EGR valve includes, for example, an engine controller unit (hereinafter referred to as an ECU) 51 that drives and controls a stepping motor M such as a hybrid PM type four-phase motor.
  • the opening and closing of the control valve 11 is adjusted by performing open-loop control of the stepping motor M in increments of step angles.
  • the conventional method of controlling an EGR valve uses a control valve 11
  • a predetermined return torque is applied in the opening or closing direction of 1 and the control valve 11 can be changed in the closing or opening direction by energizing one direction of the DC motor M (hereinafter referred to as "M").
  • the control valve 11 is opened and closed by applying a torque to the motor and the torque balance of the motor.
  • a feedback control system that performs PID control of the motor based on the deviation of the motor, and an I-gain clear means of the feedback control system when the deviation falls within a predetermined allowable range. For example, it is described in Japanese Patent Application Laid-Open No. Hei 10-222609.
  • line A is the operating characteristic when the control valve 11 is opened by increasing the motor torque
  • line B is the operating characteristic when the control valve 11 is closed by decreasing the motor torque, and the return torque is given.
  • the inclination of the operating characteristics A and B changes according to the spring constant of the spring, and the operating characteristics A and B shift right and left in Fig. 2 depending on the magnitude of the set torque.
  • the P (proportional) gain and the I (integral) gain are required to execute the control along the operating characteristic A in FIG. Must be increased.
  • the motor torque is increased by PI control under such control, as soon as the control valve 11 opens to the target opening position, the deviation of the opening position of the control valve becomes “0”, The P component is "0”, the I component is cleared, and the return torque causes the control valve 11 to start closing.
  • the P and I components are both small, the torque cannot overcome the return torque and the deviation becomes large.
  • reference numeral 1 denotes a valve body in which a passage forming a part of an exhaust gas recirculation passage c interposed in the exhaust gas recirculation system is formed, and the control valve 11 moves upward as shown in the figure. Then, the exhaust gas recirculation passage c is closed by coming into contact with the seat 12, and the exhaust recirculation passage c is opened by moving the control valve 11 downward and separating from the seat 12.
  • valve shaft 14 is urged upward, that is, in the closing direction of the control valve 11. For this, a spring 19 is interposed.
  • the control valve 11 configured as described above is driven by the torque balance method as described above. That is, the EGR valve is provided with a predetermined return torque in the valve closing direction of the control valve 11 by the return spring 19 as an urging means, and the valve opening direction of the control valve 11 is supplied by one-way energization of the motor M. A variable motor torque is applied to the motor, and the control valve 11 is controlled to open and close by the torque balance.
  • FIG. 5 is a circuit block diagram showing an engine controller unit 51 (referred to as an ECU) for supplying a control signal to the motor M.
  • Reference numeral 50 denotes a control in the form of a computer having a microphone port for determining a motor drive voltage.
  • 52 is a battery
  • 53 is a motor drive voltage converter that converts the output of the controller 50 and supplies it to the motor M. It is composed of a diode 53b with current flowing in only one direction, an FET (electrolytic effect transistor) 53c, and an interface 53d provided between the control unit 50 and the FET 53c.
  • Reference numeral 56 denotes a regulation for securing the drive voltage (5 V) of the control unit 50.
  • the control unit 50 includes sensors provided at various parts of the vehicle, for example, a detection signal from an operation state quantity sensor 57 such as a crank angle sensor, and a detection signal from the position sensor 40, respectively. Is entered via The position sensor 40 of this example includes a movable contact part 42 that moves on a resistor 41 to which a constant voltage (5 V) is applied from a voltage supply part 60. As the rotor 21 moves with the rotation of the rotor 21, a voltage corresponding to the moving position of the motor shaft 31 is output from the movable contact portion 42 as a detection signal.
  • the motor drive voltage converter 53 turns on and off the voltage applied to the motor M in a fixed cycle, and the FET is controlled by a PWM signal corresponding to the ratio (drive duty) between the on-time and the off-time per cycle.
  • the average drive voltage applied to the motor M is controlled by switching the 5 3c.
  • FIG. 6 is a configuration diagram of the control unit 50.
  • reference numeral 61 denotes a target position calculation unit for determining an optimal opening / closing position of the control valve 11 based on a detection signal of the operating state sensor 57, and a voltage corresponding to the target position. (Hereinafter referred to as “target value”).
  • 62 outputs an AZD conversion unit (hereinafter referred to as “current value”) that performs AZD conversion of the detection signal of the position sensor 40.
  • 7 1 is the addition / subtraction unit between the target value and the current value.
  • 6 3 is the PI control amount (voltage) that combines the proportional component (P component) and the integral component (I component) based on the deviation between the target value and the current value. What is the PI control amount calculation unit that outputs the data? 1
  • Control amount calculation section 63 This is a drive duty calculation unit for calculating
  • the current value detected by the position sensor 40 and the target value are added / subtracted by the addition / subtraction unit 71 to obtain a deviation.
  • the PI control amount calculation unit 63 calculates the PI control amount from the obtained deviation and outputs it to the drive duty calculation unit 64.
  • the drive duty calculation unit 64 calculates the drive duty based on the PI control amount. And supply it to Moryu M.
  • the present invention has been made to solve the above-described problems, and it is intended to improve the responsiveness, secure operation stability in the vicinity of a target value, and prevent an overshoot / undershoot. It is intended to provide a method for controlling a gas recirculation valve. Disclosure of the invention
  • a biasing means applies a return torque to an opening / closing valve in one direction in a valve opening direction or a valve closing direction, and the motor is opposed to the return torque in a moment.
  • a torque is applied overnight, and the valve is opened and closed by the torque balance of these two torques. If the deviation is small and within the specified range, control is switched to PI control.
  • the control method of the exhaust gas recirculation valve according to the present invention is based on the binary control.
  • PI control is started using the stable manipulated variable in the previous PI control stored in memory.
  • the method for controlling the exhaust gas recirculation valve according to the present invention Is a binary control if the function value determined by the deviation between the target value and the present value of the on-off valve and the opening / closing speed of the on-off valve is large and out of the specified range, and PI control if the function value is small and within the specified range.
  • the threshold value that shifts from PI control to binary control is wider than the threshold value that shifts from binary control to PI control. -As a result, the switching operation from PI control to binary control can be performed smoothly and stably.
  • FIG. 1 is a schematic explanatory view of an engine exhaust system.
  • Fig. 2 is a characteristic diagram of the motor torque versus the open / close position of the control valve in the EGR valve of the torque balance drive system.
  • Fig. 3 is a characteristic diagram showing the relationship between time and the operating position of the motor shaft.
  • FIG. 5 is a configuration diagram of a control device using a so-called torque balance driving method using a motor.
  • FIG. 6 is a configuration diagram of a control unit in the control device.
  • FIG. 7 is a configuration diagram of a control unit that implements the control method of the present invention.
  • FIG. 8 is a flowchart illustrating a control method according to the first embodiment of the present invention.
  • FIG. 9 is a diagram for explaining the valve opening operation.
  • FIG. 10 is a flowchart illustrating a control method according to Embodiment 2 of the present invention.
  • FIG. 7 is a block diagram of a control unit for implementing the control method of the present invention.
  • reference numeral 61 denotes a control valve based on the detection signal of the lotus rotation state sensor 57.
  • 62 outputs an A / D converter (hereinafter, referred to as “current value”) for A / D converting the detection signal of the position sensor 40.
  • 7 1 is the addition / subtraction unit between the target value and the current value.
  • 6 3 is the PI control amount (voltage) that combines the proportional component (P component) and the integral component (I component) based on the deviation between the target value and the current value.
  • PI control amount calculation unit that outputs the detected value 65 is a binary control amount calculation unit, 66 detects the deviation between the target value and the current value, and if the detected deviation is outside the predetermined range, the switching switch is used.
  • FIG. 8 is a flowchart illustrating a control method according to the first embodiment.
  • a target value is given from the outside
  • the current value detected by the position sensor 40 and the target value are added and subtracted by the addition / subtraction unit 71.
  • the control area is determined based on the obtained deviation (step ST 3), and it is determined whether it is the PI control area based on the determination result (step ST 4). If NO, the switching switches 67 a and 67 b are calculated as binary control amounts. Switching to the section 65, the calculation of the binary control amount operation direction is performed (step ST5).
  • the switching switches 67a and 67b are switched to the PI control amount calculating section 63 to calculate the PI operation manipulated variable (step ST6). Then, a driving force is supplied to the motor M via the driving duty calculating section 64 (step ST 7).
  • step ST17 if the above determination is YES, the switching switches 67a and 67b are switched to the PI control amount calculating section 63 (step ST17). Then, a driving force is supplied to the motor M via the driving duty calculation section 64 (step ST18).
  • Embodiment 3-In Embodiments 1 and 2 when shifting from the binary control to the PI control, the PI control is started using the stable operation amount at the time of the previous PI control stored in the memory. By doing so, when shifting from binary control to PI control, the change in the manipulated variable is small, and the switching operation from binary control to PI control can be performed stably.
  • the threshold for shifting from PI control to binary control is wider than the threshold for shifting from binary control to PI control. In this way, when shifting from PI control to binary control, the switching operation can be performed smoothly and stably.
  • PI control has been described. Therefore, PID control may be used because it is a kind of PI control. Industrial applicability
  • a part of the exhaust gas in the exhaust passage a is returned to the intake passage b in a rapid response to a change in the operating state of the engine. Especially suitable for.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

La présente invention concerne un moteur destiné à entraîner une vanne de recirculation des gaz d'échappement d'un système de recirculation des gaz d'échappement, qui effectue une commande binaire lorsque la différence entre une valeur cible et la valeur actuelle ou une fonction définie par cette différence et la vitesse de fonctionnement dépasse une plage prédéterminée. Lorsque la différence ou la fonction est inférieure à cette plage, le moteur d'entraînement effectue une commande PI. La réaction et la commande en sont ainsi stabilisées.
PCT/JP2000/005480 2000-08-16 2000-08-16 Procede de commande de vanne de recirculation des gaz d'echappement WO2002014676A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002519785A JP4480938B2 (ja) 2000-08-16 2000-08-16 排気ガス再循環バルブの制御方法
PCT/JP2000/005480 WO2002014676A1 (fr) 2000-08-16 2000-08-16 Procede de commande de vanne de recirculation des gaz d'echappement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/005480 WO2002014676A1 (fr) 2000-08-16 2000-08-16 Procede de commande de vanne de recirculation des gaz d'echappement

Publications (1)

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WO2002014676A1 true WO2002014676A1 (fr) 2002-02-21

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WO (1) WO2002014676A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580120A (en) * 1978-12-13 1980-06-17 Nippon Sanso Kk Temperature control method
JPS57129246A (en) * 1981-02-03 1982-08-11 Nippon Soken Inc Exhaust gas recirculating device
JPS5960060A (ja) * 1982-09-08 1984-04-05 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング 内燃機関の排気再循環装置
US4782811A (en) * 1987-03-30 1988-11-08 Robertshaw Controls Company Exhaust gas recirculation valve construction and method of making the same
JPH10213017A (ja) * 1997-01-31 1998-08-11 Unisia Jecs Corp Ｅｇｒバルブの制御装置
JPH10220619A (ja) * 1997-02-07 1998-08-21 Unisia Jecs Corp Ｅｇｒバルブの制御装置
JPH10288052A (ja) * 1997-04-15 1998-10-27 Hitachi Ltd スロットル弁制御装置
JPH11351075A (ja) * 1998-06-12 1999-12-21 Toyota Motor Corp 内燃機関の排気ガス還流制御装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5580120A (en) * 1978-12-13 1980-06-17 Nippon Sanso Kk Temperature control method
JPS57129246A (en) * 1981-02-03 1982-08-11 Nippon Soken Inc Exhaust gas recirculating device
JPS5960060A (ja) * 1982-09-08 1984-04-05 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング 内燃機関の排気再循環装置
US4782811A (en) * 1987-03-30 1988-11-08 Robertshaw Controls Company Exhaust gas recirculation valve construction and method of making the same
JPH10213017A (ja) * 1997-01-31 1998-08-11 Unisia Jecs Corp Ｅｇｒバルブの制御装置
JPH10220619A (ja) * 1997-02-07 1998-08-21 Unisia Jecs Corp Ｅｇｒバルブの制御装置
JPH10288052A (ja) * 1997-04-15 1998-10-27 Hitachi Ltd スロットル弁制御装置
JPH11351075A (ja) * 1998-06-12 1999-12-21 Toyota Motor Corp 内燃機関の排気ガス還流制御装置

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Publication number Publication date
JP4480938B2 (ja) 2010-06-16

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