-
1.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
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。
-
2.发明公开
公开(公告)号：EP0475177A3
公开(公告)日：1993-04-21
申请号：EP91114258.6
申请日：1991-08-26
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： Deterioration of a catalyst of a catalytic converter (15) of an internal combustion engine is detected, during negative feedback control of the air-fuel ratio based on an output signal from at least one of a pair of O₂ sensors (16, 18) disposed respectively upstream and downstream from the catalyst in the exhaust system. The detection is executed after changing the feedback period, which is the period of alternation of a feedback correction coefficient used to control the fuel injection quantity, with the change in period being such as to provide improved accuracy of detection of catalyst deterioration. The change may consist of a single step change, in which the feedback period is set to a specific predetermined value at which the output signal amplitude from the downstream sensor, or the phase difference between the two sensor output signals, should be within predetermined limits if the catalyst is in satisfactory condition.
-
公开(公告)号：EP0359208B1
公开(公告)日：1992-08-05
申请号：EP89116884.1
申请日：1989-09-12
CPC分类号： F02D41/1479 , F02D41/2454 , F02D41/2474
-
4.发明授权Apparatus for detecting purification factor of catalyst in catalytic converter of internal combustion engine 失效装置，用于检测在催化转换器中的催化剂的净化因子用于内燃发动机
公开(公告)号：EP0475177B1
公开(公告)日：1996-10-23
申请号：EP91114258.6
申请日：1991-08-26
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
-
5.发明公开Apparatus for detecting purification factor of catalyst in catalytic converter of internal combustion engine 失效装置，用于检测在催化转换器中的催化剂的净化因子用于内燃发动机。
公开(公告)号：EP0475177A2
公开(公告)日：1992-03-18
申请号：EP91114258.6
申请日：1991-08-26
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： Deterioration of a catalyst of a catalytic converter (15) of an internal combustion engine is detected, during negative feedback control of the air-fuel ratio based on an output signal from at least one of a pair of O₂ sensors (16, 18) disposed respectively upstream and downstream from the catalyst in the exhaust system. The detection is executed after changing the feedback period, which is the period of alternation of a feedback correction coefficient used to control the fuel injection quantity, with the change in period being such as to provide improved accuracy of detection of catalyst deterioration. The change may consist of a single step change, in which the feedback period is set to a specific predetermined value at which the output signal amplitude from the downstream sensor, or the phase difference between the two sensor output signals, should be within predetermined limits if the catalyst is in satisfactory condition.
摘要翻译： 内燃发动机的催化转化器（15）的催化剂的劣化被检测到，在输出信号从一对O2传感器中的至少一个（16，18）基于所述空燃比的负反馈控制过程中弃置 分别的上游和从在排气系统中的催化剂的下游，检测被改变反馈周期之后执行，所有这些是用于控制燃料喷射量，并在周期的变化的反馈修正系数的交替的周期被检查，以 提供改进的检测的催化剂劣化的精度。 的变化可以由单一阶跃变化，其中，所述反馈周期被设置为一个特定的预定值在从下游传感器的输出信号的振幅，或者所述两个传感器的输出信号之间的相位差，应该是预定的限度，如果内的 该催化剂是处于令人满意的状态。
-
-
-
-
搜索结果
5 条记录 (耗时 0.012 秒)
