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1. 发明授权

US5417061A Device for detecting catalyst deterioration for an internal combustion engine 失效
标题翻译：用于检测内燃机的催化剂劣化的装置
公开(公告)号：US5417061A
公开(公告)日：1995-05-23
申请号：US272649
申请日：1994-07-11
申请人： Mie Maeda , Hirofumi Ohuchi
发明人： Mie Maeda , Hirofumi Ohuchi
IPC分类号： F01N3/20 , F01N11/00 , F02B77/08 , F02D41/14 , F02D41/22 , G01N27/417 , F01N3/00
CPC分类号： G01N27/4175 , F01N11/007 , F02D41/1441 , F01N2550/02 , Y02T10/47
摘要： A device for detecting the deterioration of a catalyst wherein oxygen sensors are provided on the upstream and downstream sides of the catalytic converter. Circuitry is provided for calculating integration values corresponding to areas surrounded by output signals of the oxygen sensors and designated signals; for calculating time periods between which the sensor signals reverse polarity with respect to the designated signals; for calculating a parameter for determining deterioration of the catalyst based on the integration values, the time periods or a combination of both; for determining deterioration of the catalyst by comparing the calculated parameter with a predetermined value; and for issuing an alarm when the catalyst is determined as deteriorated.
摘要翻译：一种用于检测催化剂劣化的装置，其中氧传感器设置在催化转化器的上游侧和下游侧。提供电路用于计算对应于由氧传感器和指定信号的输出信号包围的区域的积分值; 用于计算传感器相对于指定信号反向极性的时间段; 用于基于积分值，时间段或两者的组合来计算用于确定催化剂劣化的参数; 用于通过将所计算的参数与预定值进行比较来确定催化剂的劣化; 并且当催化剂确定为劣化时发出报警。

2. 发明授权

US5184595A Disorder diagnosis device for fuel injection apparatus 失效
标题翻译：用于燃料喷射装置的障碍诊断装置
公开(公告)号：US5184595A
公开(公告)日：1993-02-09
申请号：US831454
申请日：1992-02-05
申请人： Mie Maeda , Hirofumi Ohuchi
发明人： Mie Maeda , Hirofumi Ohuchi
IPC分类号： F02D41/14 , F02D41/22 , F02D45/00
CPC分类号： F02D41/22 , F02D41/1495
摘要： A disorder diagnosis device for a combustion engine having a fuel injector for each cylinder and a fuel system for supplying fuel to the injector comprises an air-fuel ratio sensor provided at an exhaust tube of the combustion engine for providing an air-fuel ratio signal indicative of an air-fuel ratio, and a control unit responsive to the air-fuel ratio sensor for calculating a first value by comparing the air-fuel ratio signal with a preset value and for calculating a second value by comparing a signal corresponding to the air-fuel ratio signal with a predetermined value so as to decide if the fuel system is in disorder on the basis of a combination of the first and second values.
摘要翻译：具有用于每个气缸的燃料喷射器和用于向喷射器供应燃料的燃料系统的内燃机的无障碍诊断装置包括设置在内燃机的排气管处的空燃比传感器，用于提供指示性的空燃比信号以及控制单元，其响应于所述空燃比传感器，用于通过将所述空燃比信号与预设值进行比较来计算第一值，并且用于通过比较与所述空气相对应的信号来计算第二值 - 燃料比信号，以便基于第一和第二值的组合来确定燃料系统是否处于无序状态。

3. 发明授权

US5207093A Failure diagnosis device for an EGR control system 失效
标题翻译： EGR控制系统故障诊断装置
公开(公告)号：US5207093A
公开(公告)日：1993-05-04
申请号：US821063
申请日：1992-01-16
申请人： Mie Maeda
发明人： Mie Maeda
IPC分类号： F02D45/00 , F01N11/00 , F02D41/00 , F02D41/22 , F02M25/07 , G01M13/00
CPC分类号： F01N11/00 , F02D41/0055 , F02M26/49 , F02M26/57 , G01M13/00 , F01N2550/00 , F01N2550/06 , F01N2900/0422 , Y02T10/47
摘要： A failure diagnosis device for an EGR control system detects a predetermined running condition of the engine, and includes a control device which inputs values of predetermined parameters signifying the running condition of the engine at first predetermined times. The control device calculates differences between preceding input values and current input values, accumulates the differences, and opens the EGR path after determining that the EGR control system is normal, i.e. when the accumulated value reaches or exceeds a predetermined value after a second predetermined time has elapsed from when the EGR path is forcibly closed. The control device determines that the EGR control system has failed and generates an alarm when the accumulated value is below the predetermined value when the second predetermined time has elapsed.
摘要翻译：用于EGR控制系统的故障诊断装置检测发动机的预定行驶状态，并且包括在第一预定时间输入表示发动机的运行状态的预定参数的值的控制装置。控制装置计算先前输入值和当前输入值之间的差异，积累差异，并且在确定EGR控制系统正常之后即在累积值在第二预定时间之后达到或超过预定值时打开EGR路径从EGR路径被强制关闭时经过。当经过第二预定时间时，当累计值低于预定值时，控制装置确定EGR控制系统已经失败并产生报警。

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