利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

9 条记录 (耗时 0.012 秒)

    Engine air-fuel ratio controller
    1.
    发明公开
    Engine air-fuel ratio controller 有权
    拉夫特-Kraftstoff-Verhältnis-Steuerungssystem

    公开(公告)号：EP1128045A3

    公开(公告)日：2003-09-10

    申请号：EP01104307.2

    申请日：2001-02-22

    申请人： Nissan Motor Co., Ltd.

    发明人： Kobayashi, Hideaki ,  Kakizaki, Shigeaki ,  Kakuyama, Masatomo ,  Matsuno, Osamu

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1441 ,  F01N2570/16 ,  F02D41/0295 ,  F02D41/1456 ,  F02D41/2441 ,  F02D41/2454 ,  F02D41/2474 ,  F02D2200/0814

    摘要： A catalyst 3 which has oxygen storage performance is installed in an engine exhaust passage 2, an oxygen storage amount is estimated based on the output of an upstream air-fuel ratio sensor 4 installed in the upstream of the catalyst 3, and an air-fuel ratio is controlled so that this oxygen storage amount coincides with a target value. When the output of a downstream air-fuel ratio sensor 5 has become lean or rich for longer than a fixed time, the output of the upstream air-fuel ratio sensor 4 is corrected based on the output of the downstream air-fuel ratio sensor 5 placed in the downstream of the catalyst 3. In this way, the output fluctuation due to deterioration of the air-fuel ratio sensor 4 upstream of the catalyst is corrected, and the catalyst oxygen storage amount is always precisely controlled to the target value.

    摘要翻译： 具有储氧性能的催化剂3安装在发动机排气通道2中，基于安装在催化剂3的上游的上游空燃比传感器4的输出和空气燃料来估计储氧量 控制该比例使得该储氧量与目标值一致。 当下游空燃比传感器5的输出变得稀薄或浓缩超过固定时间时，上游空燃比传感器4的输出根据下游空燃比传感器5的输出被校正 放置在催化剂3的下游。以这种方式，校正了由于催化剂上游的空燃比传感器4的劣化引起的输出波动，并且催化剂氧气储存量总是精确地控制在目标值。

    Engine air-fuel ratio controller
    5.
    发明公开
    Engine air-fuel ratio controller 有权
    空燃比控制系统

    公开(公告)号：EP1128045A2

    公开(公告)日：2001-08-29

    申请号：EP01104307.2

    申请日：2001-02-22

    申请人： Nissan Motor Co., Ltd.

    发明人： Kobayashi, Hideaki ,  Kakizaki, Shigeaki ,  Kakuyama, Masatomo ,  Matsuno, Osamu

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1441 ,  F01N2570/16 ,  F02D41/0295 ,  F02D41/1456 ,  F02D41/2441 ,  F02D41/2454 ,  F02D41/2474 ,  F02D2200/0814

    摘要： A catalyst 3 which has oxygen storage performance is installed in an engine exhaust passage 2, an oxygen storage amount is estimated based on the output of an upstream air-fuel ratio sensor 4 installed in the upstream of the catalyst 3, and an air-fuel ratio is controlled so that this oxygen storage amount coincides with a target value. When the output of a downstream air-fuel ratio sensor 5 has become lean or rich for longer than a fixed time, the output of the upstream air-fuel ratio sensor 4 is corrected based on the output of the downstream air-fuel ratio sensor 5 placed in the downstream of the catalyst 3. In this way, the output fluctuation due to deterioration of the air-fuel ratio sensor 4 upstream of the catalyst is corrected, and the catalyst oxygen storage amount is always precisely controlled to the target value.

    Air-fuel ratio control of engine
    6.
    发明公开
    Air-fuel ratio control of engine 有权
    用于内燃发动机的空气 - 燃料比的控制系统

    公开(公告)号：EP1128043A2

    公开(公告)日：2001-08-29

    申请号：EP01104129.0

    申请日：2001-02-21

    申请人： Nissan Motor Co., Ltd.

    发明人： Kobayashi, Hideaki ,  Matsuno, Osamu ,  Kakuyama, Masatomo

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1455 ,  F02D41/0295 ,  F02D41/1441 ,  F02D41/1495 ,  F02D41/2441 ,  F02D41/2454 ,  F02D41/2474 ,  F02D2200/0814

    摘要： A catalytic converter. (3) having a three-way catalyst which stores oxygen is disposed in the exhaust passage (2) of an engine (1). An oxygen storage amount of the catalyst is estimated based on the output of a universal exhaust gas oxygen sensor (4) provided upstream of the catalytic converter (3). A control unit (6) controls an air-fuel ratio of the fuel mixture supplied to the engine (1) through a fuel injector (12) so that the oxygen storage amount coincides with a target value. An excess/deficiency oxygen amount in the exhaust gas is accumulated when the output of an oxygen sensor (5) which detects the oxygen concentration downstream of the catalytic converter (3) is in an excess oxygen region which is higher than a stoichiometric oxygen concentration region. An average oxygen excess ratio is calculated by dividing the accumulated value by an accumulated intake air amount. The output of the universal exhaust gas oxygen sensor (4) is corrected based on the average oxygen excess ratio. In the same manner, the output of the universal exhaust gas oxygen sensor (4) is corrected based on the average oxygen excess ratio when the output of the oxygen sensor (5) is in an deficiency oxygen region which is lower than the stoichiometric oxygen concentration region. These corrections compensate for fluctuations in the output resulting from deterioration of the universal exhaust gas oxygen sensor (4) or due to manufacturing errors and the calculation accuracy of the oxygen storage amount of the catalyst is thereby increased.

    Air-fuel ratio control of engine
    7.
    发明公开
    Air-fuel ratio control of engine 有权
    Steuersystemfürdas Luft-Kraftstoff-Verhältniseiner Brennkraftmaschine

    公开(公告)号：EP1128043A3

    公开(公告)日：2003-09-10

    申请号：EP01104129.0

    申请日：2001-02-21

    申请人： Nissan Motor Co., Ltd.

    发明人： Kobayashi, Hideaki ,  Matsuno, Osamu ,  Kakuyama, Masatomo

    IPC分类号： F02D41/14

    CPC分类号： F02D41/1455 ,  F02D41/0295 ,  F02D41/1441 ,  F02D41/1495 ,  F02D41/2441 ,  F02D41/2454 ,  F02D41/2474 ,  F02D2200/0814

    摘要： A catalytic converter. (3) having a three-way catalyst which stores oxygen is disposed in the exhaust passage (2) of an engine (1). An oxygen storage amount of the catalyst is estimated based on the output of a universal exhaust gas oxygen sensor (4) provided upstream of the catalytic converter (3). A control unit (6) controls an air-fuel ratio of the fuel mixture supplied to the engine (1) through a fuel injector (12) so that the oxygen storage amount coincides with a target value. An excess/deficiency oxygen amount in the exhaust gas is accumulated when the output of an oxygen sensor (5) which detects the oxygen concentration downstream of the catalytic converter (3) is in an excess oxygen region which is higher than a stoichiometric oxygen concentration region. An average oxygen excess ratio is calculated by dividing the accumulated value by an accumulated intake air amount. The output of the universal exhaust gas oxygen sensor (4) is corrected based on the average oxygen excess ratio. In the same manner, the output of the universal exhaust gas oxygen sensor (4) is corrected based on the average oxygen excess ratio when the output of the oxygen sensor (5) is in an deficiency oxygen region which is lower than the stoichiometric oxygen concentration region. These corrections compensate for fluctuations in the output resulting from deterioration of the universal exhaust gas oxygen sensor (4) or due to manufacturing errors and the calculation accuracy of the oxygen storage amount of the catalyst is thereby increased.

    摘要翻译： 催化转化器。 在发动机（1）的排气通路（2）中设置具有存储氧的三元催化剂的（3）。 基于设置在催化转化器（3）上游的通用排气氧传感器（4）的输出，推定催化剂的储氧量。 控制单元（6）通过燃料喷射器（12）控制供给到发动机（1）的燃料混合物的空燃比，使得氧气储存量与目标值一致。 当检测到催化转化器（3）下游的氧浓度的氧传感器（5）的输出为高于化学计量氧浓度区域的过量氧区域时，累积排气中的过量/不足氧量 。 通过将累计值除以累积进气量来计算平均氧过剩率。 通用排气氧传感器（4）的输出根据平均氧气过剩率进行校正。 以相同的方式，当氧传感器（5）的输出处于低于化学计量氧浓度的不足氧区域时，基于平均氧气过剩率来校正通用废气氧传感器（4）的输出 地区。 这些校正补偿了由通用废气氧传感器（4）的劣化引起的输出的波动或者由于制造误差而导致催化剂的储氧量的计算精度的提高。