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1. 发明授权

US5974857A Apparatus and method for controlling oxygen sensor heating 有权
标题翻译：用于控制氧传感器加热的装置和方法
公开(公告)号：US5974857A
公开(公告)日：1999-11-02
申请号：US172662
申请日：1998-10-15
申请人： Yukihiro Yamashita , Hisashi Iida , Jun Hasegawa
发明人： Yukihiro Yamashita , Hisashi Iida , Jun Hasegawa
IPC分类号： F02D41/14 , G01N27/406
CPC分类号： F02D41/1476 , F02D41/1494 , G01N27/4067 , F02D41/1456
摘要： A sensing element of an oxygen sensor is controlled to keep a target impedance for maintaining activation temperature of the oxygen sensor. As the sensing element deteriorates, its internal impedance increases and power supply to a heater for heating the sensing element increases. The oxygen sensor temperature rises excessively above an activation temperature. To restrict excessive temperature rise, the target impedance is altered when the supply power to the heater exceeds a predetermined reference. The target impedance may be increased with increase in the power supply to the heater. Alternatively, the heater supply power is limited to a predetermined maximum for restricting excessive temperature rise.
摘要翻译：控制氧传感器的感测元件以保持目标阻抗以保持氧传感器的激活温度。当传感元件劣化时，其内部阻抗增加，并且用于加热感应元件的加热器的电力供应增加。氧传感器温度过高上升到活化温度以上。为了限制过度的温度上升，当加热器的供电超过预定的参考值时，目标阻抗被改变。目标阻抗可以随着对加热器的电力供应的增加而增加。或者，加热器供给功率被限制在预定的最大值以限制过度的温度上升。

2. 发明授权

US5964208A Abnormality diagnosing system for air/fuel ratio feedback control system 失效
公开(公告)号：US5964208A
公开(公告)日：1999-10-12
申请号：US878064
申请日：1997-06-18
申请人： Yukihiro Yamashita , Jun Hasegawa , Hisashi Iida , Wakichi Kondo , Yasuo Sagisaka , Masahiko Yamaguchi
发明人： Yukihiro Yamashita , Jun Hasegawa , Hisashi Iida , Wakichi Kondo , Yasuo Sagisaka , Masahiko Yamaguchi
IPC分类号： F02D41/14 , F02D41/22
CPC分类号： F02D41/1495 , F02D41/1456 , F02D41/22 , F02D2041/1432 , F02D41/1441 , Y02T10/40
摘要： An air/fuel ratio control system controls the supply of fuel to an internal combustion engine to achieve a target air/fuel ratio, based on the output of an air/fuel ratio sensor. The system may determine whether there is an abnormality in the air/fuel ratio sensor based on a comparison between a change of an air/fuel ratio correction coefficient, used to drive the air/fuel ratio to the target value, and a change of the target air/fuel ratio if the target air/fuel ratio has sharply changed. Alternatively, the diagnosis operation may be performed based on a comparison between a total air/fuel ratio correction amount and a change of the air/fuel ratio detected by the air/fuel ratio sensor, a phase difference calculation between peaks of the air/fuel ratio or the air/fuel ratio correction coefficient, or by accumulating the differences between the air/fuel ratio and the target air/fuel ratio, and the differences between the air/fuel ratio correction coefficient and a reference value, and comparing the accumulated values. In addition, the system may detect a sensor abnormality based on the deviation in phase of the air/fuel ratio from the air/fuel ratio correction coefficient. These diagnosis operations can precisely and easily detect the occurrence of an abnormality in the air/fuel ratio sensor. As a result, the air/fuel ratio control system will not use an imprecise output from the sensor for air/fuel ratio control, thus achieving highly precise and highly reliable air/fuel ratio control.

3. 发明授权

US5852228A Apparatus and method for controlling oxygen sensor heating 失效
公开(公告)号：US5852228A
公开(公告)日：1998-12-22
申请号：US883590
申请日：1997-06-26
申请人： Yukihiro Yamashita , Hisashi Iida , Jun Hasegawa
发明人： Yukihiro Yamashita , Hisashi Iida , Jun Hasegawa
IPC分类号： F02D41/14 , G01N27/406
CPC分类号： F02D41/1476 , F02D41/1494 , G01N27/4067 , F02D41/1456
摘要： A sensing element of an oxygen sensor is controlled to keep a target impedance for maintaining activation temperature of the oxygen sensor. As the sensing element deteriorates, its internal impedance increases and power supply to a heater for heating the sensing element increases. The oxygen sensor temperature rises excessively above an activation temperature. To restrict excessive temperature rise, the target impedance is altered when the supply power to the heater exceeds a predetermined reference. The target impedance may be increased with increase in the power supply to the heater. Alternatively, the heater supply power is limited to a predetermined maximum for restricting excessive temperature rise.

4. 发明授权

US06032659A Abnormality diagnosing system for air/fuel ratio feedback control system 有权
标题翻译：空燃比反馈控制系统异常诊断系统
公开(公告)号：US06032659A
公开(公告)日：2000-03-07
申请号：US358849
申请日：1999-07-22
申请人： Yukihiro Yamashita , Hisashi Iida , Yasuo Sagisaka
发明人： Yukihiro Yamashita , Hisashi Iida , Yasuo Sagisaka
IPC分类号： F02D41/14 , F02D41/22
CPC分类号： F02D41/1495 , F02D41/1456 , F02D41/22 , F02D2041/1432 , F02D41/1441 , Y02T10/40
摘要： An air/fuel ratio control system controls the supply of fuel to an internal combustion engine to achieve a target air/fuel ratio, based on the output of an air/fuel ratio sensor. The system may determine whether there is an abnormality in the air/fuel ratio sensor based on a comparison between a change of an air/fuel ratio correction coefficient, used to drive the air/fuel ratio to the target value, and a change of the target air/fuel ratio if the target air/fuel ratio has sharply changed. Alternatively, the diagnosis operation may be performed based on a comparison between a total air/fuel ratio correction amount and a change of the air/fuel ratio detected by the air/fuel ratio sensor, a phase difference calculation between peaks of the air/fuel ratio or the air/fuel ratio correction coefficient, or by accumulating the differences between the air/fuel ratio and the target air/fuel ratio, and the differences between the air/fuel ratio correction coefficient and a reference value, and comparing the accumulated values. In addition, the system may detect a sensor abnormality based on the deviation in phase of the air/fuel ratio from the air/fuel ratio correction coefficient. These diagnosis operations can precisely and easily detect the occurrence of an abnormality in the air/fuel ratio sensor. As a result, the air/fuel ratio control system will not use an imprecise output from the sensor for air/fuel ratio control, thus achieving highly precise and highly reliable air/fuel ratio control.
摘要翻译：空/燃比控制系统基于空/燃比传感器的输出来控制向内燃机供给燃料以实现目标空燃比。该系统可以基于将用于驱动空/燃比与目标值的空燃比校正系数的变化与目标值的变化之间的比较来确定空/燃比传感器是否存在异常目标空燃比目标空燃比急剧变化时。或者，可以基于空气/燃料比传感器检测到的总空气/燃料比校正量与空气/燃料比的变化之间的比较来执行诊断操作，空气/燃料的峰值之间的相位差计算或空燃比校正系数，或者通过累积空燃比和目标空燃比之间的差异，以及空/燃比校正系数与参考值之间的差异，并将累积值。此外，系统可以基于空/燃比与空燃比校正系数的相位偏差来检测传感器异常。这些诊断操作可以精确且容易地检测空气/燃料比传感器中的异常的发生。因此，空燃比控制系统不会使用来自传感器的空气/燃料比控制的不精确输出，从而实现高精度和高可靠性的空/燃比控制。

5. 发明授权

US5967129A Air-fuel ratio control for internal combustion engine enabling feedback before sensor activation 失效
标题翻译：内燃机的空燃比控制在传感器激活之前能够进行反馈
公开(公告)号：US5967129A
公开(公告)日：1999-10-19
申请号：US55320
申请日：1998-04-06
申请人： Yukihiro Yamashita , Hisashi Iida
发明人： Yukihiro Yamashita , Hisashi Iida
IPC分类号： F02D41/14 , F02D41/22 , F02M25/00
CPC分类号： F02D41/1495 , F02D41/1476 , F02D41/1456
摘要： An air-fuel ratio control using an A/F sensor which outputs a current representing an air-fuel ratio in response to a voltage applied thereto. If the A/F sensor is still in a state prior to activation and the actual air-fuel ratio is different from an air-fuel ratio represented by a current of the sensor in the state prior to activation when the engine is started, that is, if the air-fuel ratio is put on the rich side by an increased amount of fuel injected at a start of an internal combustion engine at a low temperature or other causes, for example a CPU employed in an ECU, determines whether the difference between the .lambda.-conversion value of the current of the A/F sensor and a target air-fuel ratio is equal to or greater than a predetermined value. If the determination is YES, a feedback control of the air-fuel ratio is started. Then, the CPU carries out the feedback control of the air-fuel ratio based on a deviation of the current of the A/F sensor from a current value representing the target air-fuel ratio.
摘要翻译：使用A / F传感器的空燃比控制，该A / F传感器响应于施加到其上的电压而输出表示空燃比的电流。如果A / F传感器仍然处于激活之前的状态，并且实际空燃比不同于在发动机起动之前的状态下由传感器的电流表示的空燃比，即如果通过在内燃机起动时在低温或其它原因引起的燃料量的增加而将空燃比置于浓侧，例如在ECU中使用的CPU，则判定是否存在 A / F传感器的电流的λ转换值和目标空燃比等于或大于预定值。如果确定为是，则开始空燃比的反馈控制。然后，CPU基于A / F传感器的电流与表示目标空燃比的当前值的偏差来执行空燃比的反馈控制。

6. 发明授权

US06898927B2 Emission control system with catalyst warm-up speeding control 有权
标题翻译：排放控制系统，催化剂预热超速控制
公开(公告)号：US06898927B2
公开(公告)日：2005-05-31
申请号：US10270270
申请日：2002-10-15
申请人： Syujiro Morinaga , Hisashi Iida , Yoshihiro Majima , Tatsuya Oka , Akira Ichikawa , Keiji Wakahara , Masayuki Tsutsumi , Hideyuki Maeji , Masakazu Yamada , Takanori Takahashi , Yukihiro Yamashita
发明人： Syujiro Morinaga , Hisashi Iida , Yoshihiro Majima , Tatsuya Oka , Akira Ichikawa , Keiji Wakahara , Masayuki Tsutsumi , Hideyuki Maeji , Masakazu Yamada , Takanori Takahashi , Yukihiro Yamashita
IPC分类号： F01N3/20 , F01N3/22 , F01N11/00 , F01N13/02 , F01N13/04 , F02D41/02 , F02D41/14 , F01N3/00
CPC分类号： F02D41/1496 , F01N3/2006 , F01N3/22 , F01N11/00 , F01N11/007 , F01N13/009 , F01N13/0093 , F01N13/011 , F01N2550/02 , F01N2550/14 , F01N2900/0422 , F02D41/0255 , F02D41/1456 , F02D41/1494 , F02D2041/2058 , Y02T10/26 , Y02T10/47
摘要： An emission control system has a catalyst and a sensor responding to a component of exhaust gas. In order to speed warming up the catalyst, the emission control system increases the amount of heat dissipated by exhaust gas. A diagnosis of the emission control system is carried out by determining whether the amount of heat dissipated by exhaust gas is sufficient or insufficient. The amount of heat dissipated by exhaust gas is represented by the length of time to an activated state of the sensor. In the diagnosis, the amount of heat generated by a heater provided in the sensor is taken into consideration.
摘要翻译：排放控制系统具有响应废气成分的催化剂和传感器。为了加速催化剂的升温，排放控制系统增加排气散发的热量。排放控制系统的诊断是通过确定废气散发的热量是否足够或不足来进行。由排气消耗的热量由传感器的激活状态的时间长度表示。在诊断中，考虑了设置在传感器中的加热器产生的热量。

7. 发明授权

US06539707B2 Exhaust emission control system for internal combustion engine 失效
公开(公告)号：US06539707B2
公开(公告)日：2003-04-01
申请号：US09968837
申请日：2001-10-03
申请人： Noriaki Ikemoto , Yukihiro Yamashita , Hisashi Iida , Kouichi Shimizu
发明人： Noriaki Ikemoto , Yukihiro Yamashita , Hisashi Iida , Kouichi Shimizu
IPC分类号： F01N300
CPC分类号： F02D41/1474 , F01N13/009 , F02D41/123 , F02D41/1441 , F02D41/1456 , F02D41/1483 , F02D41/1495
摘要： An upstream catalyst and a downstream catalyst are disposed in series in an exhaust pipe, and first through third sensors for detecting the air-fuel ratio or an adsorption amount of hazardous components on the rich/lean side of exhaust gases are disposed on the upstream and downstream sides of the upstream catalyst and the downstream side of the downstream catalyst, respectively. An ECU for controlling an engine controls the air-fuel ratio so that when the adsorption amount of the hazardous components on the rich side of the downstream catalyst is large, that of the hazardous components on the lean side of the upstream catalyst is large. Similarly, the ECU controls the air-fuel ratio so that when the adsorption amount of the hazardous components on the lean side of the downstream catalyst is large, that of the hazardous components on the rich side of the upstream catalyst is large.

8. 发明授权

US6085518A Air-fuel ratio feedback control for engines 有权
标题翻译：发动机空燃比反馈控制
公开(公告)号：US6085518A
公开(公告)日：2000-07-11
申请号：US144270
申请日：1998-08-31
申请人： Yukihiro Yamashita , Shujiro Morinaga , Hisashi Iida , Hidenobu Muto
发明人： Yukihiro Yamashita , Shujiro Morinaga , Hisashi Iida , Hidenobu Muto
IPC分类号： F01N3/20 , F01N11/00 , F02D41/02 , F02D41/14 , F01N3/00
CPC分类号： F01N11/007 , F02D41/0235 , F02D41/1441 , F01N2550/02 , F01N2900/0422 , F02D41/1456 , F02P2017/003 , Y02T10/47
摘要： An air-fuel ratio feedback control has an air-fuel ratio sensor and an oxygen sensor at an upstream side and a downstream side of a catalytic converter. A CPU feedback controls an air-fuel ratio detected by the air-fuel ratio sensor to a target air-fuel ratio, with a feedback gain being varied with an output of the oxygen sensor. The CPU further estimates an air-fuel ratio response speed based on a ratio between an exhaust gas flow amount and a capacity of the catalyst and determines a rate of deterioration of the catalyst. The CPU varies further the feedback gain based on the estimated response speed and the determined rate of deterioration.
摘要翻译：空燃比反馈控制在催化转化器的上游侧和下游侧具有空燃比传感器和氧传感器。 CPU反馈将由空燃比传感器检测到的空燃比控制为目标空燃比，反馈增益随着氧传感器的输出而变化。 CPU进一步基于废气流量与催化剂的容量之比估计空燃比响应速度，并确定催化剂的劣化率。 CPU根据估计的响应速度和确定的劣化速率进一步反馈反馈增益。

9. 发明授权

US5758632A Diagnostic apparatus for air-fuel ratio sensor 失效
标题翻译：空燃比传感器诊断装置
公开(公告)号：US5758632A
公开(公告)日：1998-06-02
申请号：US623787
申请日：1996-03-29
申请人： Yukihiro Yamashita , Hisashi Iida , Yasuo Sagisaka
发明人： Yukihiro Yamashita , Hisashi Iida , Yasuo Sagisaka
IPC分类号： F02D41/14
CPC分类号： F02D41/1495 , F02D41/1456
摘要： The fuel ratio control system controls the supply of fuel to an internal combustion engine to achieve a target air-fuel ratio, based on the output of an air-fuel ratio sensor. The system may determine whether there is an abnormality in the air-fuel ratio sensor based on a comparison between a change of an air-fuel ratio correction coefficient, used to drive the air-fuel ratio to the target value, and a change of the target air-fuel ratio if the target air-fuel ratio has sharply changed. Alternatively, the diagnosis operation may be performed based on a comparison between a total air-fuel ratio correction amount and a change of the air-fuel ratio detected by the air-fuel ratio sensor, a phase difference calculation between peaks of the air-fuel ratio or the air-fuel ratio correction coefficent, or by accumulating the differences between the air-fuel ratio and the target air-fuel ratio, and the differences between the air-fuel ratio correction coefficient and a reference value, and comparing the accumulated values. In addition, the system may detect a sensor abnormality based on the deviation in phase of the air-fuel ratio from the air-fuel ratio correction coefficient. These system may also detect sensor abnormality on the basis of the behavior of the air-fuel ratio during transitional engine operation. As a result, the air-fuel ratio control system will not use an imprecise output from the sensor for air-fuel ratio control, thus achieving highly precise and highly reliable air-fuel ratio control.
摘要翻译：燃料比控制系统基于空燃比传感器的输出来控制向内燃机供给燃料以实现目标空燃比。该系统可以基于将用于驱动空燃比与目标值的空燃比校正系数的变化与目标值的变化之间的比较来确定空燃比传感器是否存在异常如果目标空燃比急剧变化，则为目标空燃比。或者，可以基于总空燃比校正量与由空燃比传感器检测的空燃比的变化之间的比较，空气燃料的峰值之间的相位差计算来进行诊断操作或空燃比校正系数，或者通过累积空燃比和目标空燃比之间的差异以及空燃比校正系数与参考值之间的差异，并将累积值。此外，系统可以基于空燃比校正系数的空燃比的相位偏差来检测传感器异常。这些系统还可以基于过渡发动机运转期间的空燃比的行为来检测传感器异常。结果，空燃比控制系统不会使用来自传感器的空燃比控制的不精确输出，从而实现高精度和高可靠性的空燃比控制。

10. 发明授权

US5727383A Catalyst deterioration detecting apparatus and exhaust emission control device failure detecting apparatus 失效
标题翻译：催化剂劣化检测装置和废气排放控制装置故障检测装置
公开(公告)号：US5727383A
公开(公告)日：1998-03-17
申请号：US597562
申请日：1996-02-02
申请人： Yukihiro Yamashita , Hisashi Iida , Masaaki Nakayama
发明人： Yukihiro Yamashita , Hisashi Iida , Masaaki Nakayama
IPC分类号： F01N3/20 , F01N11/00 , F02D41/02 , F02D41/14 , F01N3/28
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0422 , F02D41/0255 , Y02T10/47
摘要： An exhaust pipe of an internal combustion engine is equipped with a three-way catalytic converter. Provided upstream and downstream the converter are an A/F sensor and a downstream O2 sensor, respectively. A CPU executes air-fuel feedback control according to the readings from the A/F sensor. When the period of air-fuel ratio inversion by the downstream O2 sensor has exceeded a predetermined time, the CPU determines that the three-way catalytic converter is activated. At that point, the CPU estimates the quantity of heat required from the start-up of the engine up to catalyst activation. The quantity of heat is obtained by accumulating the intake air quantity from the start of the engine up to catalyst activation (i.e., accumulated intake air quantity). Given the accumulated quantity of heat calculated, the CPU determines accordingly whether the three-way catalytic converter has deteriorated.
摘要翻译：内燃机的排气管配有三元催化转化器。在转换器的上游和下游分别设置有A / F传感器和下游O2传感器。 CPU根据A / F传感器的读数执行空燃比反馈控制。当下游O2传感器的空燃比反转时间超过预定时间时，CPU确定三元催化转化器被激活。在这一点上，CPU估计从发动机启动到催化剂激活所需的热量。通过将从发动机起动进入的吸入空气量累积到催化剂活化（即，累积进气量）来获得热量。给定计算的累计热量，CPU相应地确定三元催化转化器是否劣化。

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