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WO2002014675A1 - Regulateur pour soupape de recirculation de gaz d'echappement - Google Patents

Regulateur pour soupape de recirculation de gaz d'echappement Download PDF

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Publication number
WO2002014675A1
WO2002014675A1 PCT/JP2000/005467 JP0005467W WO0214675A1 WO 2002014675 A1 WO2002014675 A1 WO 2002014675A1 JP 0005467 W JP0005467 W JP 0005467W WO 0214675 A1 WO0214675 A1 WO 0214675A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
exhaust gas
gas recirculation
motor
shaft
Prior art date
Application number
PCT/JP2000/005467
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 PCT/JP2000/005467 priority Critical patent/WO2002014675A1/fr
Publication of WO2002014675A1 publication Critical patent/WO2002014675A1/fr

Links

Classifications

    • 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
    • F02M26/52—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
    • F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
    • 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 valve element (open / close valve) 11 of an EGR valve is disposed in an exhaust gas recirculation circuit c that communicates an exhaust passage a and an intake passage b of the engine E.
  • the control device of the EGR valve controls the driving of a stepping motor 1 (hereinafter, referred to as motor 1) as a drive source by an engine controller unit (hereinafter, ECU) 31, for example.
  • motor 1 stepping motor 1
  • ECU engine controller unit
  • a conventional control device for this type of E-valve applies a predetermined return torque in the valve closing direction of the valve body 11 by biasing means and drives the valve body 11 by driving the motor 1 in the valve opening direction.
  • a motor torque that varies in the valve direction is applied, and the opening and closing of the valve body 11 is controlled by the torque balance.
  • FIG. 2 is a longitudinal sectional view in which a configuration of a control device of the EGR valve is partially cut away.
  • reference numeral 1 denotes a stepping motor as a driving source, for example, a configuration in which a cylindrical rotor 4 is arranged on the inner diameter side of a step 3 in which four-phase excitation coils 2 are mounted in 48 slots. It is.
  • a cylindrical magnet 5 in which the N pole and the S pole are alternately magnetized 24 poles is fitted around the outer periphery of the mouth 4.
  • a threaded motor shaft 7 is provided on the inner diameter side of the female screw member 4 through the female screw member 6, and the rotational movement of the mouth 4 is moved up and down by the motor shaft 7 through the female screw member 6.
  • the lower end of the motor shaft 7 is connected to a valve shaft 10 via two connecting plates 8 and 9, and the lower end of the valve shaft 10 is
  • the valve body 11 is fixed to the section, and the valve opening is adjusted by controlling the distance by which the valve body 11 is moved up and down on the valve seat 12.
  • the upper connecting plate 8 is fixed to the lower end of the motor shaft 7, and the lower connecting plate 9 is fixed to the upper end of the valve shaft 10.
  • the motor shaft 7 and the upper connecting plate 8 can move in the valve closing direction.
  • the lower connecting plate 9 is urged downward (in the valve closing direction) by the outer compression coil spring 14 and the inner compression coil spring 15, and when the valve body 11 is moved up and down (opened and closed), both compression coils are moved.
  • the lower connecting plate 9 is held by the springs 14 and 15 in a state where the lower connecting plate 9 is engaged with the engaging claws 13 of the upper connecting plate 8, and the valve shaft 10 is vertically moved integrally with the motor shaft 7. It works.
  • the opening of the valve seat 12 communicates with an inlet port 17 through which exhaust gas flows in from the exhaust passage a side and an output port 18 through which exhaust gas flows out to the surge tank side.
  • the motor shaft 7 moves downward (valve closing direction), and the valve shaft 10 moves downward integrally with this.
  • the valve element 11 moves in the direction approaching the valve seat 12, and finally, the valve element 11 is fitted and closely attached to the valve seat 12, and becomes a fully closed state.
  • the motor shaft 7 moves further downward by staking the spring force of the inner compression coil spring 15 and the valve shaft 10 and the valve body 11 Is overstroked downward in the stroke of the inner compression coil spring 15.
  • the valve element 11 is more strongly pressed against the valve seat 12, and the recirculation of the exhaust gas is reliably shut off.
  • a hole IC 20 as a rotation sensor is disposed above the mouth 4 in the housing 19.
  • This Hall IC 2 ⁇ is one in which the Hall element and the IC for amplification are integrated.
  • a rotation detecting magnetizing portion 21 is formed as a rotation detecting portion, in which N and S poles are alternately magnetized at a fixed pitch. The rotation of the section 21 is detected by the Hall IC 20. Then, the occurrence of step-out is detected based on the output signal of the hall IC 20.
  • An object of the present invention is to provide a control device for an exhaust gas recirculation valve which can detect the occurrence of step-out without using Ic. Disclosure of the invention
  • a control device for an exhaust gas recirculation valve includes a valve shaft having an on-off valve, a return spring for urging the valve shaft in a closing direction, and a motor shaft acting on the valve shaft. And a control means for controlling the driving of the stepping motor, and a step voltage is detected by comparing the terminal voltage of each phase coil of the stepping motor with a predetermined reference value.
  • a step-out detecting means includes a valve shaft having an on-off valve, a return spring for urging the valve shaft in a closing direction, and a motor shaft acting on the valve shaft.
  • FIG. 1 is a schematic explanatory view of an engine exhaust system.
  • Fig. 2 is a longitudinal sectional view of the EGR valve driven by a steering motor.
  • FIG. 3 is a drive control circuit diagram of the stepping motor according to the present invention.
  • FIG. 4 is an equivalent circuit diagram of the steering mode.
  • FIG. 5 is a terminal voltage waveform diagram of each phase coil during a stepping mode when no step-out occurs.
  • Fig. 6 is an operation waveform diagram of the mouth of the stepping mode when step-out does not occur.
  • FIG. 7 is a terminal voltage waveform diagram of each phase coil in the stepping mode when step-out occurs.
  • FIG. 8 is an operation waveform diagram of the mouth of the stepping mode when step-out occurs.
  • FIG. 3 is a block diagram of a drive control circuit (hereinafter referred to as ECU) 31 for outputting a drive pulse signal to the excitation coils 2a to 2d of each phase of the steering mode 1.
  • the drive control circuit 31 includes a central processing unit 32 as a control means, which is a CPU, storage circuits ROM and RAM, and a water temperature sensor that detects an engine cooling water temperature and outputs a signal corresponding to the detected temperature.
  • a voltage level correction circuit 33 that amplifies the signal and a signal from the intake air amount sensor of the engine to correct the required voltage
  • a / D converts the signal output from the voltage level correction circuit 33
  • D Comparator 34 a waveform shaping circuit 35 that shapes the pulse voltage output from the ignition coil according to the engine speed
  • a stepping spider 1 from the central processing unit 32. It is provided with a drive circuit 36 that converts a control signal to be controlled into a drive pulse signal and supplies the drive pulse signal to the excitation coils 2 a to 2 d of each phase of the stepping motor 1.
  • a control program for controlling the steering mode 1 is stored in the storage circuit ROM, and the central processing unit 32 drives the steering mode 1 in accordance with the control program stored in the storage circuit ROM, and By controlling the opening and closing of 11, the flow rate of the air passing through the bypass passage is controlled.
  • Fig. 4 is the equivalent circuit diagram of stepping mode 1, and the excitation coils of each phase are The circuits 2a to 2d are connected to the output terminals of the ECU 31 via switching circuits 37a to 37d.
  • Each of the switching circuits 37a to 37d is composed of a switching transistor 38 and a diode 39.
  • 40 is an OR circuit that detects the terminal voltage of the excitation coils 2a to 2d of each phase
  • 41 is a circuit that compares the output of the OR circuit 40 with a reference value T determined in advance by experiment or combi simulation. And a comparison circuit as step-out detecting means for detecting the occurrence of step-out.
  • the central processing unit 32 receives the signal output from the voltage level correction circuit 33 via the AZD converter 34, and receives the pulse voltage output from the ignition coil via the waveform shaping circuit 35.
  • a drive pulse signal is generated for the stepping motor 1 according to the control program stored in the storage circuit ROM, and supplied to the stepping motor 1 via the driving circuit 36.
  • the above drive pulse signal is supplied to the switching circuits 37a to 37d by applying 37a, 37c, 37a, 37d, 37d, 37c, 37c, 37b. Since they are supplied simultaneously as a pair, the excitation coils 2a to 2d of each phase of the stepping motor 1 have 2a, 2c, 2a, 2d, 2d, 2c, 2c, 2c. Excitation current flows from the 12 V power supply simultaneously with that of b.
  • the CPU 32 When the CPU 32 receives the signal indicating that the step-out has occurred, the CPU 32 notifies the occurrence of the step-out by a notifying means (not shown) such as a lamp or a speaker. As described above, according to the first embodiment, it is possible to reliably detect the occurrence of step-out without using any special device member. Industrial applicability
  • the exhaust gas recirculation valve control device quickly returns a part of the exhaust gas from the exhaust passage a to the intake passage b in response to a change in the operating state of the engine. Especially suitable for.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

L'invention concerne un régulateur destiné à une soupape de recirculation de gaz d'échappement dans un système de recirculation de gaz d'échappement. Ce système comprend un dispositif permettant de détecter un écart de phase en comparant la tension aux bornes de chaque bobine de phase d'un moteur pas-à-pas servant de source d'entraînement avec une valeur de référence. L'écart de phase peut être détecté de façon fiable sans unité ni élément additionnels.
PCT/JP2000/005467 2000-08-15 2000-08-15 Regulateur pour soupape de recirculation de gaz d'echappement WO2002014675A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/005467 WO2002014675A1 (fr) 2000-08-15 2000-08-15 Regulateur pour soupape de recirculation de gaz d'echappement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/005467 WO2002014675A1 (fr) 2000-08-15 2000-08-15 Regulateur pour soupape de recirculation de gaz d'echappement

Publications (1)

Publication Number Publication Date
WO2002014675A1 true WO2002014675A1 (fr) 2002-02-21

Family

ID=11736357

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/005467 WO2002014675A1 (fr) 2000-08-15 2000-08-15 Regulateur pour soupape de recirculation de gaz d'echappement

Country Status (1)

Country Link
WO (1) WO2002014675A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005351308A (ja) * 2004-06-08 2005-12-22 Ckd Corp 流体制御弁の制御方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6387198A (ja) * 1986-09-29 1988-04-18 Canon Inc モ−タ駆動回路
WO1988007625A1 (fr) * 1987-03-30 1988-10-06 Robertshaw Controls Company Architecture de soupape de recyclage des gaz d'echappement
JPH03218298A (ja) * 1990-01-24 1991-09-25 Oriental Motor Co Ltd ステッピングモータの脱調検出方法
JPH07131997A (ja) * 1993-11-05 1995-05-19 Yamaha Motor Co Ltd ステップモータの回転状態検出装置
JPH07327399A (ja) * 1994-04-08 1995-12-12 Tec Corp 脱調検出装置
JPH08109855A (ja) * 1994-10-11 1996-04-30 Nippondenso Co Ltd 排気ガス還流弁制御装置
JPH0951695A (ja) * 1995-08-08 1997-02-18 Toyota Motor Corp ステップモータの状態検出装置
JPH09317570A (ja) * 1996-05-27 1997-12-09 Nissan Motor Co Ltd ステップモータ式ｅｇｒ弁の故障診断装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6387198A (ja) * 1986-09-29 1988-04-18 Canon Inc モ−タ駆動回路
WO1988007625A1 (fr) * 1987-03-30 1988-10-06 Robertshaw Controls Company Architecture de soupape de recyclage des gaz d'echappement
JPH03218298A (ja) * 1990-01-24 1991-09-25 Oriental Motor Co Ltd ステッピングモータの脱調検出方法
JPH07131997A (ja) * 1993-11-05 1995-05-19 Yamaha Motor Co Ltd ステップモータの回転状態検出装置
JPH07327399A (ja) * 1994-04-08 1995-12-12 Tec Corp 脱調検出装置
JPH08109855A (ja) * 1994-10-11 1996-04-30 Nippondenso Co Ltd 排気ガス還流弁制御装置
JPH0951695A (ja) * 1995-08-08 1997-02-18 Toyota Motor Corp ステップモータの状態検出装置
JPH09317570A (ja) * 1996-05-27 1997-12-09 Nissan Motor Co Ltd ステップモータ式ｅｇｒ弁の故障診断装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005351308A (ja) * 2004-06-08 2005-12-22 Ckd Corp 流体制御弁の制御方法

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