CN1580513A - 发动机输出控制装置 - Google Patents

发动机输出控制装置 Download PDF

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CN1580513A
CN1580513A CNA2004100712407A CN200410071240A CN1580513A CN 1580513 A CN1580513 A CN 1580513A CN A2004100712407 A CNA2004100712407 A CN A2004100712407A CN 200410071240 A CN200410071240 A CN 200410071240A CN 1580513 A CN1580513 A CN 1580513A
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gas exhausting
exhausting valve
control valve
angle
exhaust control
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CN1324227C (zh
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菅野清幸
佐佐木典彦
高见规丈
森山佑一
玉井宏明
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Honda Motor Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F02B27/0226—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means characterised by the means generating the charging effect
    • F02B27/0247—Plenum chambers; Resonance chambers or resonance pipes
    • F02B27/0263—Plenum chambers; Resonance chambers or resonance pipes the plenum chamber and at least one of the intake ducts having a common wall, and the intake ducts wrap partially around the plenum chamber, i.e. snail-type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/02—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F02B27/0294—Actuators or controllers therefor; Diagnosis; Calibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/04—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases
    • F02B27/06—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F02D37/02—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for one of the functions being ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1493—Details
    • F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • F02D2250/26—Control of the engine output torque by applying a torque limit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Exhaust Silencers (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

提供一种发动机输出控制装置，即使在排气控制阀不正常工作的情况下也可获得充分的行驶性能。发动机ECU(15)包括：基本点火期间图(151)；基本燃料喷射量图(152)；决定排气控制阀(11)的目标张开角 θex－t的目标张开角决定部(153)；诊断排气控制阀(11)的控制阀诊断部(154)；决定排气控制阀(11)被诊断为异常时的基本点火期间θig的异常点火期间图(155)；以及决定排气控制阀(11)被诊断为异常时的燃料喷射抽取率Rex的异常时喷射抽取表(156)。排气控制阀驱动单元(14)向致动器(12)提供驱动电流Iex，以便使由发动机ECU(15)通知的目标张开角θex－t与实际的阀张开角θex一致。

Description

发动机输出控制装置
技术领域
本发明涉及发动机输出控制装置，特别涉及具有排气控制功能的发动机的输出控制装置，在发动机排气系统的中间设有使排气截面积变化的阀等部件以控制排气脉动。
背景技术
(日本)特开平1-313621号公报和特开2002-238828号公报中公开了以下技术：为了减低发动机的高旋转区域中的排气通路内的阻力并通过利用脉动效果来提高发动机的输出，或者提高始动性，在排气通路内配置使排气截面积可变的排气控制阀，根据车速或发动机转速等的控制参数动态地变化其张开角。
搭载有上述的排气控制阀的车辆中的基本点火期间和燃料的基本喷射量是在所述排气控制阀具有正常功能的前提下，以节气阀张开角、发动机转速或车速等作为参数来决定的。然后，对该基本点火期间和基本燃料喷射量乘以各种的补正系数来决定实际的点火期间和燃料喷射量。因此，如果排气控制阀由于某种原因而不正常工作，则由于基本点火期间和基本燃料喷射量偏离最佳值，有可能产生发动机性能下降和单位油量行驶公里数下降等的课题。
发明内容
本发明的目的在于提供一种发动机输出控制装置，以解决上述的现有技术的课题，即使在排气控制阀不正常工作的情况下也可获得充分的行驶性能。
为达成上述目的，本发明的发动机输出控制装置，在从发动机导出排气的排气通路的中间，配置可改变排气截面积的排气控制阀，其特征在于，该装置包括：诊断部件，诊断所述排气控制阀是否正常工作；以及输出控制部件，在诊断出所述排气控制阀的工作异常时降低发动机输出。
由上述特征，在排气控制阀不正常工作时，由于进行控制使发动机输出下降，所以即使在排气控制阀工作在排气截面积比设定值减少的情况下，也可确保充分的发动机性能，并可将单位油量行驶公里数的下降抑制到最小限度。
附图说明
图1是表示本发明的发动机输出控制装置的主要部分结构的方框图。
图2是表示发动机输出控制工作的流程图。
图3是表示基本点火期间和异常时点火期间的关系的图。
图4是表示喷射抽取率表的一例的图。
具体实施方式
下面参照附图详细说明本发明的最佳实施方式。图1是表示本发明的发动机输出控制装置的主要部分结构的方框图，在排气通路10内的发动机和消音器之间安装有排气控制阀11。通过由排气控制阀驱动单元14驱动的致动器12旋动所述排气控制阀11可变控制排气截面积。由张开角传感器13检测所述排气控制阀11的张开角θex，并通知给所述排气控制阀驱动单元14。
发动机ECU15包括：基本点火期间图(Map)151，基于由发动机转速传感器21检测的发动机转速Ne、由节气阀张开角传感器22检测的节气阀张开角θth以及由车速传感器23检测的车速Vs等的控制参数决定基本点火期间θig(θig1)；基本燃料喷射量图152，基于所述控制参数决定燃料的基本喷射量Tout；以及目标张开角决定部153，基于所述控制参数决定排气控制阀11的目标张开角θex-t。
所述发动机ECU还包括：诊断所述排气控制阀11的张开角异常或工作异常的排气控制阀诊断部154；决定所述排气控制阀11被诊断为异常时的基本点火期间θig(θig2)的异常点火期间图155；以及决定所述排气控制阀11被诊断为异常时的燃料喷射抽取率Rex的异常时喷射抽取表156。
所述排气控制阀驱动单元14向所述致动器12提供驱动电流Iex，以便使由所述发动机ECU15通知的目标张开角θex-t与由所述张开角传感器13检测的实际的阀张开角θex一致。所述排气控制阀驱动单元14还将由所述张开角传感器13检测的阀张开角θex通知给所述发动机ECU15。
下面参照图2的流程图详细说明实施方式的工作。在步骤S1中，取出由所述各传感器检测的发动机转速Ne、节气阀张开角θth以及车速Vs等的控制参数。在步骤S2中，取出由所述排气控制阀驱动单元14通知的排气控制阀张开角θex以及致动器驱动电流Iex。
在步骤S3中，在所述诊断部154中求出在所述目标张开角153中决定并由所述排气控制阀驱动单元14通知的目标张开角θex-t与由所述排气控制阀驱动单元14通知的实际的阀张开角θex之间的差分值，并将该差分值与基准差分值Δθex比较。这里，如果差分值的绝对值超过所述基准差分值Δθex，则诊断为张开角异常并进到步骤S10。如果差分值的绝对值未超过所述基准差分值Δθex，则进到步骤S4。
在步骤S4中，所述实际的阀张开角θex在所述诊断部154中与上限张开角θmax和下限张开角θmin进行比较。所述上限张开角θmax和下限张开角θmin分别被设定为排气控制阀11正常工作时取得的阀张开角θex的上限值和下限值。因此，如果实际的阀张开角θex超过上限张开角θmax或低于下限张开角θmin，就诊断为张开角异常并进到所述步骤S10。如果阀张开角θex在上限张开角θmax和下限张开角θmin之间则进到步骤S5。
在步骤S5中，由所述排气控制阀驱动单元14通知的致动器驱动电流Iex在所述诊断部154中与上限值Imax进行比较。所述上限值Imax预先设定为可检测在致动器12锁定时流过的锁定电流或在致动器12上施加过大的负荷时流过的电流的值，如果驱动电流Iex超过上限值Imax，则诊断为工作异常并进到所述步骤S10。如果驱动电流Iex低于上限值Imax，则进到步骤S6。
在步骤S6，基于所述发动机转速Ne、节气阀张开角θth以及车速Vs等的控制参数并参照基本点火期间图151来求出基本点火期间θig。在步骤S7中，基于所述控制参数并参照基本燃料喷射量图152来求出基本燃料喷射量Tout。在步骤S8中，加速补正系数和冷却水补正系数等各种补正系数被乘以所述基本燃料喷射量Tout。在步骤S9中，基于所述基本点火期间θig和基本燃料喷射量Tout来控制发动机。
另一方面，在所述步骤S3、S4、S5的任何一个中诊断出异常时，在步骤S10中，基于所述控制参数并参照异常时点火期间图155来决定异常时点火期间。
图3是表示基于所述基本点火期间图151决定的点火期间θig1和基于所述异常时点火期间图155决定的点火期间θig2的关系的图，在此限于发动机转速Ne来说明控制参数。本实施方式中，在诊断出排气控制阀11为异常时，对于发动机转速Ne的所有的值使点火期间θig有延迟角(リタ一ド)，以便发动机输出比平时下降。
在步骤S11中，与所述步骤S7同样，基于所述控制参数并参照基本燃料喷射量图152来求出基本燃料喷射量Tout。在步骤S12中，基于所述控制参数并参照异常时喷射抽取表156，根据所述控制参数的值来决定喷射抽取率Rex(％)。
图4是表示所述异常时喷射抽取表156的一例的图，在此限于发动机转速Ne来说明控制参数。本实施方式中，在诊断出排气控制阀11为异常时，阶梯性地设定对应于发动机转速Ne的抽取率Rex，以便发动机输出比平时下降。
在步骤S13中，将排气控制阀11为异常的消息在未图示的仪器面板上显示。在步骤S14中，基于所述决定的点火期间θig2、基本燃料喷射量Tout以及抽取率Rex执行发动机控制，以便发动机输出比平时下降。
依据本发明，在排气控制阀不正常工作时，由于控制点火期间和燃料喷射量的至少一方以使发动机输出下降，所以即使在排气控制阀工作在排气截面积比设定值减少的情况下，也可确保充分的发动机性能，并可将单位油量行驶公里数的下降抑制到最小限度。

Claims (5)

1.一种发动机输出控制装置，在从发动机导出排气的排气通路的中间，配置可改变排气截面积的排气控制阀，其特征在于，该装置包括：
诊断部件，诊断所述排气控制阀是否正常工作；以及
输出限制部件，在诊断出所述排气控制阀的工作异常时降低发动机输出。
2.如权利要求1所述的发动机输出控制装置，其特征在于，所述输出限制部件为降低发动机输出而控制点火期间和燃料喷射量的至少一方。
3.如权利要求2所述的发动机输出控制装置，其特征在于，所述输出限制部件使点火期间比基本点火期间有延迟角。
4.如权利要求2所述的发动机输出控制装置，其特征在于，所述输出控制部件抽取燃料的喷射次数。
5.如权利要求1至3的任何一项所述的发动机输出控制装置，其特征在于包括在诊断出所述排气控制阀的工作异常时显示该情况的消息的部件。
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US7210289B2 (en) 2007-05-01
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JP4159042B2 (ja) 2008-10-01
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FR2858655A1 (fr) 2005-02-11
FR2858655B1 (fr) 2009-01-16
CN1324227C (zh) 2007-07-04
US20050033502A1 (en) 2005-02-10

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