EP0837237A2 - Abgasrückführungssystem für Brennkraftmaschine und Verfahren zur Erkennung eines anormalen Betriebszustandes dieses Systems - Google Patents

Abgasrückführungssystem für Brennkraftmaschine und Verfahren zur Erkennung eines anormalen Betriebszustandes dieses Systems Download PDF

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Publication number
EP0837237A2
EP0837237A2 EP97117882A EP97117882A EP0837237A2 EP 0837237 A2 EP0837237 A2 EP 0837237A2 EP 97117882 A EP97117882 A EP 97117882A EP 97117882 A EP97117882 A EP 97117882A EP 0837237 A2 EP0837237 A2 EP 0837237A2
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EP
European Patent Office
Prior art keywords
control valve
egr control
aperture
target
exhaust gas
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP97117882A
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English (en)
French (fr)
Other versions
EP0837237A3 (de
Inventor
Takayuki Demura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
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Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of EP0837237A2 publication Critical patent/EP0837237A2/de
Publication of EP0837237A3 publication Critical patent/EP0837237A3/de
Withdrawn legal-status Critical Current

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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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
    • F02M26/57—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves using electronic means, e.g. electromagnetic valves
    • 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
    • F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system

Definitions

  • the present invention relates to an exhaust gas recirculation system for an internal combustion engine and a method of detecting an abnormal condition of the system.
  • the present invention relates to an exhaust gas recirculation system for an internal combustion engine, provided with a unit for detecting an abnormality in the system and a method of detecting such an abnormality.
  • EGR systems for detecting a fault in an EGR control valve have been proposed.
  • One of them is disclosed in Japanese Unexamined Patent Publication No. 6-299912.
  • This system employs an EGR control valve whose aperture is controlled in response to a negative pressure, an aperture detector for detecting a real aperture of the EGR control valve, and a negative pressure setter for setting a negative pressure applied to the EGR control valve in a way to achieve a target aperture that is determined according to the operating conditions of an engine.
  • the negative pressure applied to the EGR control valve is changed based on the real aperture thereof detected by the aperture detector, to optimize recirculated exhaust gas. More precisely, the negative pressure setter sets a negative pressure so that the EGR control valve may achieve a target aperture.
  • the real aperture of the EGR control valve is detected by the aperture detector and is compared with the target aperture. If the difference between them is greater than a reference value, it is determined that the EGR control valve is faulty.
  • This disclosure has a problem that the characteristics of the negative pressure setter fluctuate depending on atmospheric temperatures and the aging of parts such as springs thereof. Accordingly, a negative pressure supplied from the negative pressure setter to the EGR control valve may fluctuate around a value that corresponds to a target aperture determined based on the operating conditions of the engine. This results in fluctuating the real aperture of the EGR control valve detected by the aperture detector. Consequently, the real aperture fluctuates around the target aperture, and therefore, it is difficult to correctly determine whether or not the EGR control valve is sound.
  • An object of the present invention is to solve the problem mentioned above and provide an EGR system, for an internal combustion engine, capable of correctly determining whether or not an EGR control valve is sound, irrespective of variations in the characteristics of a unit for setting a negative pressure for the EGR control valve or the aging of the negative pressure setting unit.
  • the present invention provides an EGR system for an internal combustion engine, to diagnose an EGR control valve according to the responsivity of the EGR control valve with respect to target apertures, instead of comparing a real aperture with a specific target aperture.
  • a first aspect of the present invention provides an EGR system for an internal combustion engine, having an EGR control valve, disposed in a recirculation path that connects an exhaust path to an intake path of the engine, for controlling the flow rate of exhaust gas recirculated through the recirculation path, an aperture detector for detecting the real aperture of the EGR control valve at proper intervals, and a driver for driving the EGR control valve in a way to provide a target aperture that is set at proper intervals according to operating conditions of the engine.
  • the system is characterized by a diagnostic unit.
  • the diagnostic unit determines that the EGR system including the EGR control valve is abnormal if a first period t2, which starts at the start of the change of predetermined magnitude in target apertures and ends when a real aperture of the EGR control valve substantially agrees with a corresponding target aperture, is greater than a first reference value t3.
  • the diagnostic unit determines that the EGR system including the EGR control valve is abnormal if a second period t5, which starts at the start of the change of predetermined magnitude in target apertures and ends when a real aperture of the EGR control valve substantially agrees with a second target aperture that is set a given period t4 after the start of the change of predetermined magnitude in target apertures, is greater than a second reference value t6.
  • the diagnostic unit maximizes, if a real aperture of the EGR control valve is smaller than a corresponding target aperture after a period t7 starting from t0 and if the difference between them is greater than a reference difference ⁇ L4, the target aperture of the EGR control valve for a first continuation period "t8 - t7" until the difference between real and target apertures agrees with the reference difference ⁇ L4 at t8 counted from t0, and determines that the EGR system including the EGR control valve is abnormal if the first continuation period "t8 - t7" is greater than a third reference value t9.
  • the diagnostic unit minimizes, if a real aperture of the EGR control valve is greater than a corresponding target aperture after a period t10 starting from t0 and if the difference between them is greater than a reference difference ⁇ L5, the target aperture of the EGR control valve for a second continuation period "t11 - t10" until the difference between real and target apertures agrees with the reference difference ⁇ L5 at t11 counted from t0, and determines that the EGR system including the EGR control valve is abnormal if the second continuation period "t11 - t10" is greater than a fourth reference value t12.
  • FIG. 1 shows an exhaust gas recirculation (EGR) system of an internal combustion engine according to the present invention.
  • the EGR system has a diagnostic unit for determining whether or not the EGR system is sound.
  • the engine 1 has an exhaust manifold 2, an intake manifold 3, and an intake duct 4.
  • a throttle valve 5 is disposed in the intake duct 4.
  • a pressure sensor 6 measures a pressure in the intake duct 4.
  • a fuel injection valve 7 is arranged for each branch of the intake manifold 3.
  • a recirculation path 8 connects the exhaust manifold 2 to the intake manifold 3.
  • An EGR control valve 9 is arranged in the recirculation path 8.
  • An electronic control unit (ECU) 10 controls these parts. When the EGR control valve 9 is open, exhaust gas in the exhaust manifold 2 is recirculated into the intake manifold 3 through the recirculation path 8.
  • the ECU 10 is, for example, a microcomputer.
  • a two-way bus 11 connects parts of the ECU 10 to one another.
  • the parts include a read-only memory (ROM) 12, a random access memory (RAM) 13, a central processing unit (CPU) 14, an input port 15, and an output port 16.
  • the EGR control valve 9 is provided with a lift sensor 30 for detecting a lift, i.e., an aperture of a valve element.
  • the output of the lift sensor 30 is supplied to the input port 15 through an A/D converter 18.
  • the throttle valve 5 is connected to a throttle aperture sensor 21 for detecting the aperture of the throttle valve 5.
  • the output TA of the sensor 21 is supplied to the input port 15 through an A/D converter 22.
  • the pressure sensor 6 is attached to a surge tank of the intake manifold 3 downstream from the throttle valve 5.
  • the output PA of the pressure sensor 6 is supplied to the input port 15 through an A/D converter 29.
  • the engine 1 has a water temperature sensor 23 for detecting the temperature of water for cooling the engine 1.
  • the output THW of the sensor 23 is supplied to the input port 15 through an A/D converter 24.
  • An engine speed sensor 25 generates a signal representing an engine revolution speed NE, which is supplied to the input port 15.
  • An output port 16 is connected to drive circuits 26 and 26' for driving a vacuum switching valve 50 and the fuel injection valves 7, as well as to a drive circuit 27 connected to an alarm lamp 28.
  • the vacuum switching valve 50 is a solenoid valve composed of an electromagnetic coil 51, open-close valves 52 and 53, and a negative pressure guiding pipe 54.
  • the pipe 54 has a branch P1 connected to the atmosphere through the valve 53, a branch P2 connected to the EGR control valve 9, and a branch P3 connected to a negative pressure generating unit through a vacuum control valve 60.
  • the coil 51 receives an ON/OFF signal (a duty signal) from the drive circuit 26, to open and close the valves 52 and 53 so that a controlled negative pressure is supplied to a negative pressure chamber 90 of the EGR control valve 9 through the branch P2.
  • the negative pressure generating unit to which the vacuum control valve 60 is connected is, for example, the intake manifold 3.
  • the vacuum control valve 60 receives atmospheric pressure through a filter as well as a negative pressure from the intake manifold 3 and provides a controlled negative pressure of, for example, -130 mm Hg to the branch P3 without regard to the level of the negative pressure from the intake manifold 3.
  • the EGR control valve 9 has a diaphragm 91 that separates the inside of the valve 9 into the negative pressure chamber 90 and an atmospheric pressure chamber 94.
  • the diaphragm 91 is fixed to a shaft 33.
  • the chamber 90 incorporates a spring 92 to push the shaft 33 toward the chamber 94.
  • the lift sensor 30 is attached to the EGR control valve 9 and consists of a variable resistor 31 and a brush 32.
  • the brush 32 is fixed to the shaft 33 and slides together with the same.
  • the valve element 93 is attached to a free end of the shaft 33, to close a valve seat 83 that is arranged in the middle of the recirculation path 8.
  • a metering orifice 80 is arranged in the recirculation path 8 on the exhaust manifold 2 side of the valve seat 83.
  • a section of the recirculation path 8 between the metering orifice 80 and the valve seat 83 defines a negative pressure chamber 81.
  • a section of the recirculation path 8 between the valve seat 83 and the intake manifold 3 defines a recirculation path 82 on the intake side.
  • the ECU 10 detects a lift of the shaft 33 through the lift sensor 30 and feedback-controls the negative pressure control valve 50 to achieve a target lift that is determined according to the operating conditions of the engine.
  • real and target lifts of the shaft 33 correspond to real and target apertures of the EGR control valve 9.
  • the ON/OFF signal (duty signal) is supplied to the coil 51, and the controlled negative pressure is supplied to the EGR control valve 9 through the branch P2.
  • the negative pressure opens the valve element 93 to guide exhaust gas from the exhaust manifold 2 into the intake manifold 3 through the recirculation path 8.
  • FIG. 2 shows the details of the vacuum control valve 60.
  • the valve 60 has an air filter 61 and is connected to the intake manifold 3 serving as the negative pressure generating unit. With the use of an atmospheric pressure receiving through the air filter 61 as well as a negative pressure receiving from the intake manifold 3, the valve 60 provides the branch P3 with the controlled pressure of, for example, -130 mm Hg irrespective of the level of the negative pressure from the intake manifold 3.
  • the valve 60 has two states. In the first state, the negative pressure of the intake manifold 3 is applied to a first port 62. Then, a plate 63, retainer 64, and valve poppet 65 rise.
  • a pipe 66 stops the valve poppet 65, which tightly attaches to the lower end of the pipe 66, to seal the negative pressure.
  • the plate 63, retainer 64, and valve poppet 65 have weight, and therefore, rise slowly.
  • the lower end of the pipe 66 is sealed by the valve poppet 65 under a negative pressure that is stronger than the controlled negative pressure.
  • the plate 63 and retainer 64 further rise to set up the second state.
  • atmospheric air passing through the air filter 61 flows through an orifice 67 formed at the lower end of the retainer 64 and through a gap between the retainer 64 and the valve poppet 65.
  • the air then flows into a diaphragm chamber 69 surrounded by diaphragms 68a and 68b.
  • a spring 70 pushes down the plate 63, retainer 64, and valve poppet 65.
  • the first and second states alternate to guide the controlled negative pressure from a second port 71 into the branch P3 of the solenoid valve 50.
  • Figure 3A is a flowchart showing a first routine of diagnosing the EGR control valve 9
  • Fig. 3B is a flowchart showing a second routine of diagnosing the same
  • Fig. 4 is a graph showing lift in the EGR control valve 9 based on the first and second routines.
  • an abscissa represents time
  • an ordinate represents lift
  • a continuous curve represents target lift
  • a dotted curve represents real lift.
  • the target lift start to change at t0.
  • the first routine will be explained with reference to Figs. 3A and 4.
  • Step 101 determines whether or not target lift LTG shows a change greater than a reference value ⁇ L1 in a period t1 starting from t0 at which the target lift starts to change, where each target lift LTG is calculated from a map stored in the ROM 12 according to an engine speed NE and a load PA. If there is a change greater than ⁇ L1, step 102 is carried out, and if not, the routine ends. Step 102 determines whether or not the difference ⁇ LTG - LR ⁇ between a real lift LR detected by the lift sensor 30 a period t2 after t0 and a corresponding target lift LTG is greater than ⁇ L1.
  • step 102 compares ⁇ LTG - LR ⁇ with k ⁇ L1 (k being 0.9) or with ⁇ L2, and if ⁇ LTG - LR ⁇ > k ⁇ L1 , or ⁇ LTG - LR ⁇ > ⁇ L2 , the EGR control valve 9 or the lift sensor 30 is abnormal, and step 105 is carried out. If ⁇ LTG - LR ⁇ ⁇ k ⁇ L1 , or ⁇ LTG - LR ⁇ ⁇ ⁇ L2 , this routine ends. Step 105 turns on the alarm lamp 28 and terminates the routine.
  • Figure 5 is a flowchart showing a third routine of diagnosing the EGR control valve 9
  • Fig. 6 is a graph showing lift in the EGR control valve 9 based on the third routine.
  • an abscissa represents time
  • an ordinate represents lift
  • a continuous curve represents target lift
  • a dotted curve represents real lift.
  • Step 201 determines whether or not target lift LTG shows a change greater than a reference value ⁇ L3 in a period t4 starting from t0 at which the target lift starts to change, where each target lift LTG is calculated from the map stored in the ROM 12 according to an engine speed NE and a load PA. If there is a change greater than ⁇ L3, step 202 is carried out, and if not, the routine ends. Step 202 determines whether or not a real lift LR detected by the lift sensor 30 is equal to "L0 + ⁇ L3," where L0 is a real lift at t0. If step 202 provides YES, step 203 is carried out, and if not, the routine ends.
  • Step 203 reads a period t5 which starts at t0 and ends when the real lift LR that is equal to "L0 + ⁇ L3" is detected by the lift sensor 30.
  • Step 204 compares the period t5 with a reference value t6. If t5 > t6, the EGR control valve 9 or the lift sensor 30 is abnormal, and step 205 is carried out. If t5 ⁇ t6, the valve 9 and sensor 30 are sound, and the routine ends. Step 205 turns on the alarm lamp 28, and the routine ends.
  • Figure 7 is a flowchart showing a fourth routine of diagnosing the EGR control valve 9
  • Fig. 8 is a graph showing lift in the EGR control valve 9 based on the fourth routine.
  • an abscissa represents time
  • an ordinate represents lift
  • a continuous curve represents target lift that starts to change at t0
  • a dotted curve represents real lift
  • a dot-and-dash line represents duty factors applied to the coil 51 of the vacuum switching valve 50.
  • Step 306 calculates a continuation period "t8 - t7" for which the duty factor of the valve 50 has been kept at 100% and compares it with a reference value t9. If t8 - t7 > t9 , the EGR control valve 9 or the lift sensor 30 is abnormal, and step 307 is carried out. If t8 - t7 ⁇ t9 , the valve 9 and sensor 30 are sound, and the routine ends. Step 307 turns on the alarm lamp 28, and the routine ends. Step 308 determines whether or not a period counted from t0 is greater than the reference value t9. If so, the EGR control valve 9 or the lift sensor 30 is abnormal, and step 307 is carried out, and if not, the routine ends.
  • Step 403 provides an ON/OFF signal, i.e., a duty signal representing a duty factor of 0% from the drive circuit 26 to the coil 51 of the vacuum switching valve 50.
  • Step 404 determines whether or not the difference "LR - LTG" between a real lift LR detected after the duty factor of the valve 50 has been set to 0% and a corresponding target lift LTG is smaller than ⁇ L5. If step 404 provides YES, step 405 is carried out, and if not, step 408 is carried out. Step 405 reads a period t11 which starts at t0 and ends when step 404 determines that the difference "LR - LTG" becomes smaller than ⁇ L5, and releases the 0% duty factor from the valve 50.
  • the present invention determines whether or not the EGR system including the EGR control valve is sound according to the responsivity of the EGR control valve with respect to target apertures of the EGR control valve, instead of comparing a real aperture of the EGR control valve with a specific target aperture thereof that is determined based on engine operating conditions. After the EGR conditions are met and when a target aperture of the EGR control valve shows a change greater than a predetermined magnitude, the present invention detects a real aperture of the EGR control valve with the use of the aperture detector, and if the real aperture does not follow the change in the target apertures, determines that the EGR system including the EGR control valve is abnormal. Consequently, the present invention is capable of correctly determining whether or not the EGR control valve is sound without regard to fluctuations in the characteristics of the negative pressure setter for setting a negative pressure applied to the EGR control valve or the aging of the negative pressure setter.
  • An exhaust gas recirculation (EGR) system for an internal combustion engine is capable of correctly determining whether or not an EGR control valve (9) is sound, irrespective of variations in the characteristics of a unit for setting a negative pressure applied to the EGR control valve or the aging of the unit.
  • EGR exhaust gas recirculation

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP97117882A 1996-10-16 1997-10-15 Abgasrückführungssystem für Brennkraftmaschine und Verfahren zur Erkennung eines anormalen Betriebszustandes dieses Systems Withdrawn EP0837237A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8273402A JPH10122058A (ja) 1996-10-16 1996-10-16 内燃機関の排ガス再循環装置
JP273402/96 1996-10-16

Publications (2)

Publication Number Publication Date
EP0837237A2 true EP0837237A2 (de) 1998-04-22
EP0837237A3 EP0837237A3 (de) 1999-04-28

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EP97117882A Withdrawn EP0837237A3 (de) 1996-10-16 1997-10-15 Abgasrückführungssystem für Brennkraftmaschine und Verfahren zur Erkennung eines anormalen Betriebszustandes dieses Systems

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EP (1) EP0837237A3 (de)
JP (1) JPH10122058A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6609059B2 (en) * 2000-06-19 2003-08-19 Honda Giken Kogyo Kabushiki Kaisha Control system for internal combustion engine
WO2003071121A1 (fr) * 2002-02-25 2003-08-28 Renault S.A.S. Procédé et dispositif de diagnostic de l'état de fonctionnement d'une vanne de recirculation de gaz d'échappement d'un moteur a combustion interne
EP1394400A1 (de) * 2002-08-23 2004-03-03 Toyota Jidosha Kabushiki Kaisha Fehlerdiagnosevorrichtung und -methode für Abgasrückführungssystem
EP2088307A2 (de) * 2008-02-11 2009-08-12 Behr GmbH & Co. KG Akulator für eine Bypass-Regeleinrichtung eines Bypasses bei einem Wärmetauscher, Wärmetauscher oder Baueinheit mit einem oder mehreren Wärmetauschern, Bypasssystem, Fahrzeugdiagnosesystem, Abgasrückführsystem, Ladeluftzuführsystem und Verwendung des Wärmetauschers oder der Baueinheit
CN102245889A (zh) * 2008-12-11 2011-11-16 日野自动车株式会社 内燃机的egr装置
CN102918254A (zh) * 2010-09-21 2013-02-06 三菱重工业株式会社 内燃机的废气再循环装置
US9500148B2 (en) 2010-01-27 2016-11-22 Mitsubishi Heavy Industries, Ltd. Control device and control method used for engine intake air-or-gas system
WO2019214821A1 (en) 2018-05-09 2019-11-14 Toyota Motor Europe An egr flow determination method, an egr rate error determination method, a control method for an internal combustion engine, and an internal combustion engine
US10941735B2 (en) 2018-01-22 2021-03-09 Ford Global Technologies, Llc Methods and systems for an exhaust-gas recirculation valve

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Publication number Priority date Publication date Assignee Title
JPS59185857A (ja) * 1983-04-05 1984-10-22 Honda Motor Co Ltd 内燃エンジンの排気還流量制御方法
JPS6011665A (ja) * 1983-06-30 1985-01-21 Honda Motor Co Ltd 内燃エンジンの排気還流弁制御方法
JPS6181567A (ja) * 1984-09-13 1986-04-25 Honda Motor Co Ltd 内燃エンジンの排気還流制御方法
JP2727534B2 (ja) * 1990-08-21 1998-03-11 本田技研工業株式会社 内燃エンジンの排気還流制御方法
JP2845198B2 (ja) * 1996-06-12 1999-01-13 トヨタ自動車株式会社 排気ガス再循環装置の異常判定装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6609059B2 (en) * 2000-06-19 2003-08-19 Honda Giken Kogyo Kabushiki Kaisha Control system for internal combustion engine
WO2003071121A1 (fr) * 2002-02-25 2003-08-28 Renault S.A.S. Procédé et dispositif de diagnostic de l'état de fonctionnement d'une vanne de recirculation de gaz d'échappement d'un moteur a combustion interne
FR2836517A1 (fr) * 2002-02-25 2003-08-29 Renault Procede et dispositif de diagnostic de l'etat de fonctionnement d'une vanne de recirculation de gaz d'echappement d'un moteur a combustion interne
US7100585B2 (en) 2002-02-25 2006-09-05 Renault S.A.S. Method and device for diagnosing the operating condition of an internal combustion engine exhaust gas recycling valve
EP1394400A1 (de) * 2002-08-23 2004-03-03 Toyota Jidosha Kabushiki Kaisha Fehlerdiagnosevorrichtung und -methode für Abgasrückführungssystem
EP2088307A3 (de) * 2008-02-11 2014-02-26 Behr GmbH & Co. KG Akulator für eine Bypass-Regeleinrichtung eines Bypasses bei einem Wärmetauscher, Wärmetauscher oder Baueinheit mit einem oder mehreren Wärmetauschern, Bypasssystem, Fahrzeugdiagnosesystem, Abgasrückführsystem, Ladeluftzuführsystem und Verwendung des Wärmetauschers oder der Baueinheit
EP2088307A2 (de) * 2008-02-11 2009-08-12 Behr GmbH & Co. KG Akulator für eine Bypass-Regeleinrichtung eines Bypasses bei einem Wärmetauscher, Wärmetauscher oder Baueinheit mit einem oder mehreren Wärmetauschern, Bypasssystem, Fahrzeugdiagnosesystem, Abgasrückführsystem, Ladeluftzuführsystem und Verwendung des Wärmetauschers oder der Baueinheit
CN102245889A (zh) * 2008-12-11 2011-11-16 日野自动车株式会社 内燃机的egr装置
CN102245889B (zh) * 2008-12-11 2014-03-05 日野自动车株式会社 内燃机的egr装置
US9500148B2 (en) 2010-01-27 2016-11-22 Mitsubishi Heavy Industries, Ltd. Control device and control method used for engine intake air-or-gas system
CN102918254A (zh) * 2010-09-21 2013-02-06 三菱重工业株式会社 内燃机的废气再循环装置
CN102918254B (zh) * 2010-09-21 2015-07-15 三菱重工业株式会社 内燃机的废气再循环装置
US10113495B2 (en) 2010-09-21 2018-10-30 Mitsubishi Heavy Industries, Ltd. Exhaust gas recirculation device for internal combustion engine
US10941735B2 (en) 2018-01-22 2021-03-09 Ford Global Technologies, Llc Methods and systems for an exhaust-gas recirculation valve
WO2019214821A1 (en) 2018-05-09 2019-11-14 Toyota Motor Europe An egr flow determination method, an egr rate error determination method, a control method for an internal combustion engine, and an internal combustion engine

Also Published As

Publication number Publication date
JPH10122058A (ja) 1998-05-12
EP0837237A3 (de) 1999-04-28

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