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    Air-fuel ratio feedback control apparatus for engines
    2.
    发明公开
    Air-fuel ratio feedback control apparatus for engines 审中-公开
    装置，用于控制用于内燃机燃烧空气比

    公开(公告)号：EP1674701A3

    公开(公告)日：2007-06-06

    申请号：EP05256898.7

    申请日：2005-11-08

    申请人： Honda Motor Co., Ltd.

    发明人： Uraki, Mamoru ,  Yamazaki, Ryutaro ,  Hayashi, Tatsuo ,  Kono, Tomoya ,  Abe, Takeru

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1456 ,  F02D41/1479 ,  F02D41/1484 ,  F02D41/1489 ,  F02D2041/2048

    摘要： An air-fuel ratio feedback control is provided To prevent over-rich and over-lean of an air-fuel mixture.
    An air-fuel ratio setting section 50 sets a target air-fuel ratio KCMD according to engine conditions. An air-fuel ratio correction coefficient calculating section 51 calculates an air-fuel ratio correction coefficient KAF for controlling the air-fuel ratio so that a detected air-fuel ratio KACT is converged to the target air-fuel ratio KCMD.
    To prevent over-rich and over-lean of the air-fuel mixture, a lower limit section 52 constrains the air-fuel ratio correction coefficient KAF so as not to underrun the lower limit value, and an upper limit section 53 constrains the air-fuel ratio correction coefficient KAF so as not to exceed the upper limit value. A basic fuel injection time determining section 54 calculates a basic fuel injection time TIM, and a fuel injection time calculating section 55 calculates a fuel injection time TOUT based on the target air-fuel ratio KCMD, the air-fuel ratio correction coefficient KAF, the basic fuel injection time TIM or the like, and various engine parameters.

    Plant control system
    3.
    发明公开
    Plant control system 有权
    Anlagesteuerungssystem

    公开(公告)号：EP1450221A2

    公开(公告)日：2004-08-25

    申请号：EP04012915.7

    申请日：2000-04-14

    申请人： HONDA GIKEN KOGYO KABUSHIKI KAISHA

    发明人： Yasui, Yuji

    IPC分类号： G05B13/04 ,  F02D41/14 ,  F02D41/02

    CPC分类号： G05B13/042 ,  F02D41/1402 ,  F02D41/1403 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/1479 ,  F02D41/1481 ,  F02D41/1482 ,  F02D2041/1409 ,  F02D2041/1416 ,  F02D2041/1418 ,  F02D2041/142 ,  F02D2041/1423 ,  F02D2041/1426 ,  F02D2041/1431 ,  F02D2041/1433 ,  G05B13/047

    摘要： A downstream exhaust system controller (10) generates a target value for the output of an upstream O 2 sensor (7) disposed between first (3) and second (4) catalytic converters for converging the output of a downstream O 2 sensor (6) disposed downstream of the second catalytic converter to a target value while taking into account the dead time of a downstream exhaust system (E1). An upstream exhaust system controller (11) generates a target air-fuel ratio for an internal combustion engine (1) for converging the output of the upstream O 2 sensor to a target value while taking into account the dead time of an upstream exhaust system (E2). A fuel processing controller (12) controls the air-fuel ratio of the internal combustion engine at the target air-fuel ratio according to a feedback control process.

    摘要翻译： 下游排气系统控制器（10）产生用于输出设置在第一（3）和第二（4）催化转化器之间的上游O 2传感器（7）的目标值，用于会聚下游O 2传感器（6）的输出， 在第二催化转化器的下游设置为目标值，同时考虑下游排气系统（E1）的死区时间。 上游排气系统控制器（11）产生用于将上游O 2传感器的输出会聚到目标值的内燃机（1）的目标空燃比，同时考虑上游排气系统的死区时间（ E2）。 燃料处理控制器（12）根据反馈控制过程控制内燃机的目标空燃比的空燃比。

    Method for controlling engine exhaust gas system
    4.
    发明公开
    Method for controlling engine exhaust gas system 失效
    用于控制发动机的排气系统的方法

    公开(公告)号：EP1302648A2

    公开(公告)日：2003-04-16

    申请号：EP03000710.8

    申请日：1997-06-20

    申请人： NGK INSULATORS, LTD.

    发明人： Kato, Nobuhide ,  Kurachi, Hiroshi

    IPC分类号： F02D41/14 ,  F02D41/02

    CPC分类号： G01N27/4175 ,  B01D53/9495 ,  F01N11/00 ,  F01N2550/02 ,  F01N2560/026 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/146 ,  F02D41/1479 ,  F02D41/1495 ,  F02D2250/36 ,  G01N27/417 ,  Y02T10/22 ,  Y02T10/47

    摘要： A method for controlling an engine exhaust gas system includes the steps of detecting an air-fuel ratio of exhaust gas discharged from an internal engine by an oxygen sensor, controlling the exhaust gas to near the stoichiometric air-fuel ratio by a closed-loop control referring to a resultant signal, and leading the exhaust gas to a three-way catalyst to treat nitrogen oxide, hydrocarbon and carbon monoxide. A nitrogen oxide sensor is provided downstream of the three-way catalyst, and a control value of air-fuel ratio by a closed loop control by the oxygen sensor is corrected to set the nitrogen oxide concentration to a predetermined value in accordance with an output of the nitrogen oxide sensor. The deterioration of the three-way catalyst and/or oxygen sensor is detected by comparing a change in control corrected value for the air-fuel ratio of closed loop control referring to an output of the nitrogen oxide sensor with a predetermined value.

    Electronic system for calculating mixture strength
    7.
    发明公开
    Electronic system for calculating mixture strength 失效
    该混合组成物的计算的电子系统

    公开(公告)号：EP0856653A2

    公开(公告)日：1998-08-05

    申请号：EP98105227.7

    申请日：1994-11-09

    申请人： MAGNETI MARELLI S.p.A.

    发明人： Biagini, Luca ,  Serra, Gabriele

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1495 ,  F02B1/04 ,  F02D41/1474 ,  F02D41/1479 ,  F02D41/148 ,  F02D41/2454 ,  F02D41/2474

    摘要： System for calculating mixture strength in which an electronic panel (7) is capable of comparing the voltage generated by exhaust gas sensors, in particular from a lambda probe (19) located in the exhaust manifold (21) of a petrol engine (4), with a threshold value (Str) such as to distinguish between a first and a second state (rich state/lean state), corresponding to an air/petrol mixture supplied to the engine which contains more or less petrol, respectively, than is required by the stoichiometric ratio. The system enables this threshold to be updated periodically.

    Air-fuel ratio controller for internal combustion engine
    9.
    发明公开
    Air-fuel ratio controller for internal combustion engine 失效
    Vorrichtung zur Regelung des Brennstoff-Luft-VerhältnissesfürBrennkraftmaschinen。

    公开(公告)号：EP0359208A1

    公开(公告)日：1990-03-21

    申请号：EP89116884.1

    申请日：1989-09-12

    申请人： NIPPONDENSO CO., LTD.

    发明人： Kurita, Noriaki ,  Ninomiya, Masakazu ,  Kishita, Kazunori

    IPC分类号： F02D41/14 ,  F02D41/24

    CPC分类号： F02D41/1479 ,  F02D41/2454 ,  F02D41/2474

    摘要： A relation with output characteristic of an oxygen density sensor corresponding to a deviation of an air fuel ratio of a mixed gas supplied actually to an internal com­bustion engine from a desired air fuel ratio is stored beforehand in an air fuel ratio controller of the present invention. Then, the air fuel ratio deviation is computed correspondingly to an actual output of the oxygen density sensor according to the stored relation, and an air fuel ratio controlled variable is corrected according to the computed air fuel ratio deviation, thereby controlling the air fuel ratio to the desired air fuel ratio. Further, a change in output characteristic of the oxygen density sensor to the air fuel ratio is detected, then the output charac­teristic of the oxygen density sensor stored beforehand is corrected according to the detection result, and thus if the output characteristic of the oxygen density sensor fluctuates due to a deterioration arising on the oxygen density sensor, the air fuel ratio controlled variable will be decided in consideration of the fluctuation.

    摘要翻译： 与本发明的空燃比控制器中预先存储有与实际向内燃机供给的混合气体的空燃比的偏差相应的氧浓度传感器的输出特性与期望空燃比的关系。 然后，根据存储的关系对应于氧浓度传感器的实际输出来计算空燃比偏差，并且根据计算出的空燃比偏差校正空燃比控制量，从而将空燃比控制为 所需的空燃比。 此外，检测氧气密度传感器对空燃比的输出特性的变化，然后根据检测结果来校正预先存储的氧浓度传感器的输出特性，因此如果氧浓度传感器的输出特性 由于氧浓度传感器的劣化而发生波动，所以考虑到波动，空燃比控制变量将被决定。

    An air/fuel ratio control apparatus for an internal combustion engine
    10.
    发明公开
    An air/fuel ratio control apparatus for an internal combustion engine 失效
    Steuervorrichtung des Luft-Kraftstoff-Verhältnissesbei Verbrennungsmotoren。

    公开(公告)号：EP0282841A2

    公开(公告)日：1988-09-21

    申请号：EP88103385.6

    申请日：1988-03-04

    申请人： HITACHI, LTD.

    发明人： Osuga, Minoru ,  Oyama, Yoshishige

    IPC分类号： F02D41/14 ,  F02D41/26

    CPC分类号： F02D41/1486 ,  F02D41/1456 ,  F02D41/1474 ,  F02D41/1479

    摘要： In an internal combustion engine, in which, during the lean-burn region of its operation, fuel supplied for the engine is controlled so as to make an actual air/fuel ratio follow a predetermined lean air/fuel ratio, an air/fuel ratio control apparatus detects the amplitude of a pulsating component in an output voltage of an oxygen sensor, which is caused by occurrence of the misfire, and corrects a reference for the sensor output voltage in a feedback control of the air/fuel ratio in accordance with the detected amplitude of the pulsating component, whereby the stable operation of the engine can be secured irrespective of the aged change of the stable combustion limit of the engine.

    摘要翻译： 在内燃机中，在其运转的稀薄燃烧区域中，对发动机供给的燃料进行控制，使实际的空气/燃料比达到规定的稀薄空气/燃料比，空燃比 控制装置检测由于发生失火引起的氧传感器的输出电压中的脉动分量的振幅，并且根据空燃比的反馈控制校正传感器输出电压的基准 检测到脉动分量的振幅，从而可以确保发动机的稳定运行，而与发动机的稳定燃烧极限的老化变化无关。