公开(公告)号：US5111792A

公开(公告)日：1992-05-12

申请号：US712120

申请日：1991-06-07

申请人： Toshinari Nagai ,  Hiroshi Tanaka ,  Makoto Suzuki

发明人： Toshinari Nagai ,  Hiroshi Tanaka ,  Makoto Suzuki

IPC分类号： F02D41/14 ,  G01N27/406

CPC分类号： G01N27/4067 ,  F02D41/1494

摘要： An apparatus for controlling a heater for an oxygen sensor which includes a heater resistance value detecting unit for detecting a heater resistance value of the heater, the power control unit for controlling a power supplied to the heater so that the heater resistance value is equal to a target resistance value, and a target resistance value setting unit for calculating a rate of change in the heater resistance value of the heater measured by the heater resistance value detecting unit, and for determining the target resistance value on the basis of the rate of change in the heater resistance value.

摘要翻译： 一种用于控制氧传感器的加热器的装置，包括：加热器电阻值检测单元，用于检测加热器的加热器电阻值;功率控制单元，用于控制供给加热器的功率，使得加热器电阻值等于 目标电阻值设定单元，用于计算由加热器电阻值检测单元测量的加热器加热器电阻值的变化率，并且基于变化率来确定目标电阻值 加热器电阻值。

公开(公告)号：US5148795A

公开(公告)日：1992-09-22

申请号：US773718

申请日：1991-10-09

申请人： Toshinari Nagai ,  Hiroshi Tanaka ,  Makoto Suzuki

发明人： Toshinari Nagai ,  Hiroshi Tanaka ,  Makoto Suzuki

IPC分类号： G01N27/12 ,  F02D41/14 ,  G01N27/00

CPC分类号： F02D41/1494

摘要： An apparatus for controlling a heater for an oxygen sensor includes a heater controller for detecting a heater resistance value of a heater and for controlling the heater so that a detected resistance value of the heater is equal to a target resistance value. A specific operating condition detecting unit detects a specific operating condition of the internal combustion engine where the air-fuel ratio is other than a stoichiometric air-fuel ratio. A target resistance value changing unit changes the target resistance value when the air-fuel ratio in the specific operating condition indicated by the sensor output signal is s outside a normal range of air-fuel ratio which should be detected in the specific operating condition.

摘要翻译： 用于控制氧传感器的加热器的装置包括：加热器控制器，用于检测加热器的加热器电阻值，并用于控制加热器，使得加热器的检测电阻值等于目标电阻值。 特定的运转状态检测部检测空燃比是理论空燃比以外的内燃机的具体运转状态。 当由传感器输出信号表示的特定操作状态中的空燃比超出在特定操作条件下应检测的空燃比的正常范围时，目标电阻值改变单元改变目标电阻值。

公开(公告)号：US06666199B2

公开(公告)日：2003-12-23

申请号：US09969642

申请日：2001-10-04

申请人： Naoto Kato ,  Toshinari Nagai ,  Akira Kamoto ,  Akihiro Katayama

发明人： Naoto Kato ,  Toshinari Nagai ,  Akira Kamoto ,  Akihiro Katayama

IPC分类号： F02D4100

CPC分类号： F02D41/1494 ,  F02D41/06 ,  F02D41/222 ,  Y02T10/40

摘要： In a control device, in a control device of an internal combustion engine provided with an internal combustion engine main body mounted to a vehicle and a heater operating on the basis of an output from a specific sensor given as a trigger at least before the internal combustion engine main body starts, whether or not the heater is operated before the start is stored, and it is judged that the sensor has failed when operation of the heater is not stored.

公开(公告)号：US5848530A

公开(公告)日：1998-12-15

申请号：US783229

申请日：1997-01-14

申请人： Hiroki Matsuoka ,  Masaaki Tanaka ,  Sigemitu Iisaka ,  Michio Furuhashi ,  Toshinari Nagai ,  Tadayuki Nagai ,  Takashi Kawai ,  Kenji Harima ,  Yuichi Goto

发明人： Hiroki Matsuoka ,  Masaaki Tanaka ,  Sigemitu Iisaka ,  Michio Furuhashi ,  Toshinari Nagai ,  Tadayuki Nagai ,  Takashi Kawai ,  Kenji Harima ,  Yuichi Goto

IPC分类号： F02D43/00 ,  B01D53/86 ,  F01N3/20 ,  F01N9/00 ,  F01N11/00 ,  F01N13/02 ,  F02D45/00 ,  F01N3/00

CPC分类号： F01N11/00 ,  F01N11/002 ,  F01N13/009 ,  F01N3/2013 ,  F01N3/2026 ,  F01N2550/02 ,  F01N2900/0422 ,  Y02T10/26 ,  Y02T10/47

摘要： A device for detecting deterioration of a catalyst in an internal combustion engine having a heater on the upstream side of a catalytic converter provided in an exhaust gas passage, the device being capable of expanding the deterioration determination conditions of the catalyst. It is determined whether the conditions, except the temperature condition, are all obtained among the conditions for detecting deterioration of the catalytic converter. When the conditions, except the temperature condition, are all obtained, an electric power is supplied from a power source to the heater to satisfy the temperature condition. Deterioration of the catalyst can be reliably detected if the electric power is supplied to the heater only when the engine is in the idling operation condition and if deterioration of the catalyst is detected when the time for supplying electric power to the heater has become larger than a predetermined period of time. The heater may be one contained in the electrically heated catalyst.

摘要翻译： 一种用于检测在设置在废气通道中的催化转化器的上游侧具有加热器的内燃机中的催化剂劣化的装置，该装置能够扩大催化剂的劣化判定条件。 在用于检测催化转化器的劣化的条件之间，确定除温度条件以外的条件是否全部得到。 当除温度条件以外的条件全部获得时，从电源向加热器供电以满足温度条件。 如果仅在发动机处于怠速运转状态时将电力供给到加热器，并且当向加热器供电的时间变得大于1时，则检测到催化剂的劣化，才可以可靠地检测催化剂的劣化 预定时间段。 加热器可以是电加热催化剂中的一种。

公开(公告)号：US5743086A

公开(公告)日：1998-04-28

申请号：US734543

申请日：1996-10-21

申请人： Toshinari Nagai

发明人： Toshinari Nagai

IPC分类号： F01N3/20 ,  F01N11/00 ,  F02D41/02 ,  F02D41/14

CPC分类号： F02D41/1479 ,  F01N11/007 ,  F02D41/0235 ,  F02D41/1441 ,  F02D41/1495 ,  F01N2550/02 ,  Y02T10/22 ,  Y02T10/47

摘要： A device for judging the deterioration of a three-way catalyst comprising an upstream O.sub.2 sensor and a downstream O.sub.2 sensor which are arranged in the exhaust passage upstream and downstream of the three-way catalyst respectively. When the ratio of length of the output signal response curve of the downstream O.sub.2 sensor and the length of the output signal response curve of the upstream O.sub.2 sensor is over a threshold level, it is judged that the three-way catalyst has deteriorated. The threshold value is reduced as the mean value of the air-fuel ratio becomes off from the stoichiometric air-fuel ratio.

摘要翻译： 一种用于判断包含上游O 2传感器和下游O2传感器的三元催化剂劣化的装置，它们分别布置在三元催化剂的上游和下游的排气通道中。 当下游O2传感器的输出信号响应曲线的长度与上游O 2传感器的输出信号响应曲线的长度的比率超过阈值水平时，判定三元催化剂已劣化。 随着空燃比的平均值从理论空燃比的偏离而减小阈值。

公开(公告)号：US5737917A

公开(公告)日：1998-04-14

申请号：US753737

申请日：1996-11-29

申请人： Toshinari Nagai

发明人： Toshinari Nagai

IPC分类号： G01M15/04 ,  F01N3/20 ,  F01N3/24 ,  F01N11/00 ,  F02D41/02 ,  F02D41/14

CPC分类号： F02D41/1441 ,  F01N11/007 ,  F02D41/0235 ,  F02D41/1474 ,  F01N2550/02 ,  Y02T10/47

摘要： A device for judging the deterioration of a three-way catalyst comprising an upstream O.sub.2 sensor and a downstream O.sub.2 sensor which are arranged in the exhaust passage upstream and downstream of the three-way catalyst respectively. When the ratio of length of the output signal response curve of the downstream O.sub.2 sensor and the length of the output signal response curve of the upstream O.sub.2 sensor is over a threshold level, it is judged that the three-way catalyst has deteriorated. The judgement of deterioration of the three-way catalyst is performed when the three-way catalyst starts to be activated. At this time, the lower the temperature of the downstream O.sub.2 sensor, the lower the threshold level is made.

摘要翻译： 一种用于判断包含上游O 2传感器和下游O2传感器的三元催化剂劣化的装置，它们分别布置在三元催化剂的上游和下游的排气通道中。 当下游O2传感器的输出信号响应曲线的长度与上游O 2传感器的输出信号响应曲线的长度的比率超过阈值水平时，判定三元催化剂已劣化。 当三元催化剂开始活化时，进行三元催化剂劣化的判断。 此时，下游O2传感器的温度越低，阈值水平越低。

公开(公告)号：US5546917A

公开(公告)日：1996-08-20

申请号：US405328

申请日：1995-03-16

申请人： Akinori Osanai ,  Toshinari Nagai ,  Hiroshi Kanai ,  Kenji Harima ,  Kazuhiko Iwano ,  Shuji Yuda

发明人： Akinori Osanai ,  Toshinari Nagai ,  Hiroshi Kanai ,  Kenji Harima ,  Kazuhiko Iwano ,  Shuji Yuda

IPC分类号： F02D41/00 ,  F02D41/02 ,  F02D41/14 ,  F02D43/00 ,  F02M25/08

CPC分类号： F02D41/0042 ,  F02D41/0045 ,  F02M25/08 ,  F02D41/0032

摘要： Fuel-vapor evaporating from a fuel tank is led through a vapor pipe and absorbed in a charcoal canister. Fuel-vapor stored in the charcoal canister is supplied to an inlet pipe when a purge valve is opened when the engine is driven, because the pressure in the inlet pipe is low. Fuel-vapor is then burned as fuel in the engine. If the opening of the purge valve is suddenly increased at the start of the purge, the air fuel ratio control is disturbed. Therefore, the purge rate is gradually increased and the vapor concentration of the fuel-vapor purged from the charcoal canister is learned, and the change rate of the purge rate is made small because the air-fuel ratio control may be disturbed when the vapor concentration is not learned enough.

摘要翻译： 从燃料箱蒸发的燃料蒸气被引导通过蒸气管并吸收在炭罐中。 由于入口管内的压力较低，因此当发动机被驱动时打开吹扫阀时，储存在炭罐中的燃料蒸气被供给入口管。 然后，燃料蒸汽作为发动机中的燃料燃烧。 如果在清洗开始时清洗阀的打开突然增加，则空燃比控制被扰乱。 因此，吹扫速度逐渐增加，并且从木炭罐吹扫的燃料蒸气的蒸气浓度被学习，并且由于空气 - 燃料比控制可能在蒸汽浓度 不够学习

公开(公告)号：US4809501A

公开(公告)日：1989-03-07

申请号：US144221

申请日：1988-01-15

申请人： Nobuaki Kayanuma ,  Toshinari Nagai

发明人： Nobuaki Kayanuma ,  Toshinari Nagai

IPC分类号： F02D41/14

CPC分类号： F02D41/1479 ,  F02D41/1441

摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an air-fuel ratio correction amount is calculated in accordance with the results of the comparison of the outputs of the upstream-side and downstream-side air-fuel ratio sensors with first and second reference voltages, respectively, thereby obtaining an actual air-fuel ratio. The second reference voltage is changed in accordance with the load of the engine, to change the mean air-fuel ratio.

摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，根据比较输出的结果计算空燃比校正量 上游侧和下游侧空燃比传感器分别具有第一和第二参考电压，从而获得实际的空燃比。 第二参考电压根据发动机的负载而改变，以改变平均空燃比。

公开(公告)号：US4707984A

公开(公告)日：1987-11-24

申请号：US850619

申请日：1986-04-11

申请人： Toshiyasu Katsuno ,  Toshinari Nagai ,  Takatoshi Masui ,  Yasushi Satou

发明人： Toshiyasu Katsuno ,  Toshinari Nagai ,  Takatoshi Masui ,  Yasushi Satou

IPC分类号： F02D41/14

CPC分类号： F02D41/1439 ,  F02D41/1441 ,  F02D41/1488

摘要： In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is adjusted in accordance with the outputs of the upstream-side air-fuel ratio sensor and the downstream-side air-fuel ratio sensor. The adjustment of the actual air-fuel ratio by the downstream-side air-fuel ratio sensor is prohibited in accordance with a coolant temperature of the engine.

摘要翻译： 在设置在废气通道中的催化剂转化器的上游和下游的两个空燃比传感器系统中，实际空燃比根据上游侧空气燃料的输出 比传感器和下游侧空燃比传感器。 根据发动机的冷却剂温度，禁止由下游侧空燃比传感器调节实际空燃比。

公开(公告)号：US20050217244A1

公开(公告)日：2005-10-06

申请号：US11133215

申请日：2005-05-20

申请人： Akira Kamoto ,  Toshinari Nagai ,  Yasuhiro Oi ,  Noriyasu Adachi ,  Koji Ide ,  Daisuke Kobayashi ,  Shuntaro Okazaki ,  Naoto Kato ,  Takahiro Uchida

发明人： Akira Kamoto ,  Toshinari Nagai ,  Yasuhiro Oi ,  Noriyasu Adachi ,  Koji Ide ,  Daisuke Kobayashi ,  Shuntaro Okazaki ,  Naoto Kato ,  Takahiro Uchida

IPC分类号： F02D45/00 ,  F01N3/00 ,  F01N3/20 ,  F01N3/24 ,  F01N7/00 ,  F01N11/00 ,  F02D41/14

CPC分类号： F01N3/101 ,  F01N11/00 ,  F01N11/007 ,  F01N13/009 ,  F01N13/0093 ,  F01N2550/02 ,  F02D2200/0816 ,  Y02T10/22 ,  Y02T10/47

摘要： A catalyst degradation determining method includes the steps of: controlling an upstream-of-catalyst air-fuel ratio occurring upstream of a first catalyst to an air-fuel ratio that is rich of a stoichiometric air-fuel ratio so that first and second catalysts store oxygen up to a maximum storage amount of oxygen. The method then includes the steps of controlling the upstream-of-catalyst air-fuel ratio to a first lean air-fuel ratio until an output of a downstream-of-first-catalyst sensor indicates a lean air-fuel ratio, and then to a second lean air-fuel ratio and that has a value that is determined in accordance with an oxidizing-reducing capability index value, until a time point when an output of a downstream-of-second-catalyst air-fuel ratio sensor indicates an air-fuel ratio that is lean.