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1. 发明授权

US06499290B1 Engine exhaust purification device 有权
标题翻译：发动机排气净化装置
公开(公告)号：US06499290B1
公开(公告)日：2002-12-31
申请号：US09958022
申请日：2001-10-02
申请人： Takeshi Nakamura , Ritsuo Sato , Shigeaki Kakizaki , Masatomo Kakuyama , Osamu Matsuno
发明人： Takeshi Nakamura , Ritsuo Sato , Shigeaki Kakizaki , Masatomo Kakuyama , Osamu Matsuno
IPC分类号： F01N300
CPC分类号： F02D41/0295 , F01N11/007 , F01N2550/02 , F02D2200/0814 , F02D2200/0816 , Y02T10/47
摘要： A controller (6) controls an air-fuel ratio of an engine (1) so that an oxygen storage amount of a catalyst (3) provided in an exhaust passage (2) is maintained constant. At this time, the controller (6) computes or estimates the oxygen storage amount separately for a first amount and a second amount, where the first amount is estimated based on a relationship between the first and second amount. The controller (6) controls the air/fuel ratio based on the estimated first amount.
摘要翻译：控制器（6）控制发动机（1）的空燃比，使得设置在排气通道（2）中的催化剂（3）的储氧量保持恒定。此时，控制器（6）基于第一和第二量之间的关系来计算或估计氧储存量第一量和第二量，其中第一量被估计。控制器（6）基于估计的第一量来控制空燃比。

2. 发明授权

US06637194B2 Exhaust emission control for engine 有权
公开(公告)号：US06637194B2
公开(公告)日：2003-10-28
申请号：US09958842
申请日：2001-10-15
申请人： Masatomo Kakuyama , Shigeaki Kakizaki , Osamu Matsuno
发明人： Masatomo Kakuyama , Shigeaki Kakizaki , Osamu Matsuno
IPC分类号： F01N300
CPC分类号： B01D53/9454 , B01D53/9495 , B01D2255/908 , F01N11/007 , F01N2550/02 , F01N2900/0421 , F01N2900/0422 , F02D41/0295 , F02D41/14 , F02D41/1441 , F02D41/1456 , F02D2200/0814 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： An engine exhaust emission control arrangement has a catalytic converter including a three-way catalyst. A first oxygen sensor detects an oxygen concentration of exhaust gas upstream of the catalyst and a second oxygen sensor detects an oxygen concentration of exhaust gas downstream of the catalyst. A microprocessor calculates a specific period oxygen storage amount of a catalyst while the upstream oxygen concentration is higher than the stoichiometric concentration and the downstream oxygen concentration is in a predetermined concentration range which has a value approximately equal to the stoichiometric oxygen concentration. The microprocessor also calculates a specific period oxygen release amount of a catalyst while the upstream oxygen concentration is lower than the stoichiometric concentration and the downstream oxygen concentration produces an indication of a predetermined concentration range. A specific period oxygen storage amount is sampled at a time at which the downstream oxygen concentration becomes greater than the predetermined concentration range as a maximum oxygen storage amount and a specific period oxygen release amount is sampled at a time at which the downstream oxygen concentration becomes smaller than the predetermined concentration range as a maximum oxygen release amount. The engine air-fuel ratio is controlled to cause the oxygen storage amount of the catalyst to coincide with a target value which is set at approximately half of an average value of the maximum oxygen storage amount and the maximum oxygen release amount.

3. 发明授权

US06619032B2 Engine exhaust purification device 有权
公开(公告)号：US06619032B2
公开(公告)日：2003-09-16
申请号：US09958935
申请日：2001-10-16
申请人： Masatomo Kakuyama , Shigeaki Kakizaki , Osamu Matsuno
发明人： Masatomo Kakuyama , Shigeaki Kakizaki , Osamu Matsuno
IPC分类号： F01N300
CPC分类号： F02D41/0295 , F01N11/00 , F01N11/007 , F01N2550/02 , F01N2570/16 , F01N2900/0422 , F02D41/1441 , F02D41/187 , F02D2200/0814 , F02D2200/0816 , Y02T10/47
摘要： A microprocessor (6) computes an oxygen storage amount of a catalyst (3) separately for a high speed component and a low speed component in accordance with real characteristic. A target air-fuel ratio of an engine (1) is computed and air-fuel ratio control of the engine (1) it is performed so that the high speed component is constant. The deterioration of the catalyst (3) is determined by integrating the high speed component of the oxygen storage amount computed during the air-fuel ratio control process for a predetermined number of times, and comparing its average value with a determining value. The oxygen storage amount of the high speed component which is sensitive to catalyst deterioration is integrated so as to obtain a highly precise determining result to determine the deterioration.

4. 发明授权

US06564544B2 Engine exhaust purification arrangement 有权
公开(公告)号：US06564544B2
公开(公告)日：2003-05-20
申请号：US09959405
申请日：2001-10-24
申请人： Masatomo Kakuyama , Shigeaki Kakizaki , Osamu Matsuno
发明人： Masatomo Kakuyama , Shigeaki Kakizaki , Osamu Matsuno
IPC分类号： F01N300
CPC分类号： F01N11/007 , F01N2550/02 , F02D41/0295 , F02D41/126 , F02D2200/0814 , F02D2200/0816 , Y02T10/22 , Y02T10/47
摘要： A controller (6) computes an oxygen storage amount of a catalyst (3) separately as a high speed component/amount and a low speed component/amount according to predetermined release/adsorption characteristics. A target air-fuel ratio of an engine is computed and the air-fuel ratio of the engine is controlled so that the high speed component is maintained constant. The target air-fuel ratio of the engine (1) is limited by an upper limiter and lower limiter so that the high speed component converges to the target value, an excessively large variation of the air-fuel ratio is prevented, and impairment of drivability and fuel cost-performance is also prevented. Further, after lean running due to fuel cut, etc., the lower limiter is lowered to the rich side, and the oxygen storage amount is rapidly induced to converge on the target value.

5. 发明授权

US06622479B2 Engine exhaust purification device 有权
公开(公告)号：US06622479B2
公开(公告)日：2003-09-23
申请号：US09958983
申请日：2001-10-16
申请人： Masatomo Kakuyama , Shigeaki Kakizaki , Osamu Matsuno
发明人： Masatomo Kakuyama , Shigeaki Kakizaki , Osamu Matsuno
IPC分类号： F01N300
CPC分类号： F01N9/005 , F01N11/007 , F01N2550/02 , F01N2570/16 , F02D41/0295 , F02D2200/0814 , F02D2200/0816 , Y02T10/47
摘要： A controller (6) computes the oxygen storage amount of the catalyst (3) separately as a high-speed component and a low speed component in accordance with actual characteristic. A target air-fuel ratio of an engine (1) is computed so that the oxygen storage amount is a predetermined target amount, and air-fuel ratio control of the engine (1) is performed. The oxygen storage amount is computed using an storage/release rate set according to the exhaust air-fuel ratio and catalyst temperature, etc. In this way, the oxygen storage amount of the catalyst can be precisely computed regardless of the variation in the storage/release rate which accompanies a catalyst temperature variation, and the real oxygen storage amount can therefore be controlled with a higher level of precision.

6. 发明授权

US06494038B2 Engine air-fuel ratio controller 有权
标题翻译：发动机空燃比控制器
公开(公告)号：US06494038B2
公开(公告)日：2002-12-17
申请号：US09790899
申请日：2001-02-23
申请人： Hideaki Kobayashi , Shigeaki Kakizaki , Masatomo Kakuyama , Osamu Matsuno
发明人： Hideaki Kobayashi , Shigeaki Kakizaki , Masatomo Kakuyama , Osamu Matsuno
IPC分类号： F01N300
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长于固定时间时，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。这样，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，催化剂氧气储存量始终精确地控制在目标值。

7. 发明授权

US06490859B2 Engine exhaust purification device 有权
标题翻译：发动机排气净化装置
公开(公告)号：US06490859B2
公开(公告)日：2002-12-10
申请号：US09790725
申请日：2001-02-23
申请人： Masatomo Kakuyama , Osamu Matsuno , Shigeaki Kakizaki
发明人： Masatomo Kakuyama , Osamu Matsuno , Shigeaki Kakizaki
IPC分类号： F01N300
CPC分类号： B01D53/9454 , B01D53/9495 , F01N3/0835 , F01N11/007 , F01N2550/02 , F01N2550/03 , F02D41/0295 , F02D41/1456 , F02D2200/0814 , Y02T10/20 , Y02T10/22 , Y02T10/47
摘要： An oxygen storage amount of the catalyst (3) is estimated using a detection result from a front A/F sensor (4). An HC storage amount is calculated as a time integral of the product of the storage rate by the catalyst (3), the air-fuel ratio and the intake air amount, and a target air-fuel ratio is corrected so that a deficiency relative to a target amount of the oxygen storage amount is compensated based on this computation result.
摘要翻译：使用前A / F传感器（4）的检测结果来估计催化剂（3）的储氧量。计算HC储存量作为催化剂（3）的储存率乘积的时间积分，空燃比和进气量，校正目标空燃比，使得相对于基于该计算结果补偿氧气存储量的目标量。

8. 发明授权

US06314724B1 Air-fuel ratio controller and method of controlling air-fuel ratio 失效
标题翻译：空燃比控制器和空燃比控制方法
公开(公告)号：US06314724B1
公开(公告)日：2001-11-13
申请号：US09715181
申请日：2000-11-20
申请人： Masatomo Kakuyama , Akira Tayama , Hirofumi Tsuchida , Shigeaki Kakizaki
发明人： Masatomo Kakuyama , Akira Tayama , Hirofumi Tsuchida , Shigeaki Kakizaki
IPC分类号： F01N300
CPC分类号： F02D41/0295 , F02D35/023 , F02D41/187 , F02D2200/0404 , F02D2200/0814 , F02D2200/1015 , F02D2200/501
摘要： An air-fuel ratio controller for an internal combustion engine with a catalytic converter in an exhaust passage has an air-fuel ratio sensor, an engine sensor, and a control unit. The air-fuel ratio sensor produces a signal indicative of an air-fuel ratio of an exhaust gas in the exhaust passage on an upstream side of the catalytic converter. The engine sensor produces a signal indicative of misfiring of the engine. The control unit is operatively coupled to the air-fuel ratio sensor and the engine sensor. The control unit computes an estimated quantity of oxygen to be stored in the catalytic converter based on the signal from the air-fuel ratio sensor, and determines if the engine is misfiring based on the signal from the engine sensor. The control unit also produces an estimated adjustment value and adjusts an air-fuel ratio of intake air based on the estimated adjustment value such that the estimated quantity of oxygen to be stored substantially coincides with a predetermined target quantity of oxygen to be stored. However, when misfiring is determined based on the signal from the engine sensor, the computation of the estimated quantity of oxygen to be stored is stopped or not used, and a predetermined value is used to control the air-fuel ratio of intake air. With the air-fuel ratio controller of the present invention, influence of misfiring on air-fuel ratio control can be reduced.
摘要翻译：用于具有排气通道中的催化转化器的内燃机的空燃比控制器具有空燃比传感器，发动机传感器和控制单元。空燃比传感器产生表示催化转化器上游侧的排气通道中的废气的空燃比的信号。发动机传感器产生指示发动机失火的信号。控制单元可操作地联接到空燃比传感器和发动机传感器。控制单元基于来自空燃比传感器的信号计算要存储在催化转化器中的氧气的估计量，并且基于来自发动机传感器的信号来确定发动机是否发动机失火。控制单元还产生估计的调整值，并且基于估计的调整值调节进气的空燃比，使得待储存的氧气的估计量基本上与要存储的预定目标氧气量一致。然而，当基于来自发动机传感器的信号确定失火时，停止或不使用要储存的氧气的估计量的计算，并且使用预定值来控制进气的空燃比。利用本发明的空燃比控制器，可以减少对空燃比控制的失火的影响。

9. 发明授权

US06446429B2 Air-fuel ratio control of engine 有权
标题翻译：发动机空燃比控制
公开(公告)号：US06446429B2
公开(公告)日：2002-09-10
申请号：US09790901
申请日：2001-02-23
申请人： Hideaki Kobayashi , Osamu Matsuno , Masatomo Kakuyama
发明人： Hideaki Kobayashi , Osamu Matsuno , Masatomo Kakuyama
IPC分类号： F01N300
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：具有储存氧的三元催化剂的催化转化器（3）设置在发动机（1）的排气通路（2）中。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，使得储氧量与目标值一致。当检测催化转化器（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，排出废气中的过量/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，基于平均氧气超过率来校正通用排气氧传感器（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提高。

10. 发明授权

US06282889B1 Air/fuel ration control system of internal combustion engine 有权
标题翻译：内燃机空气/燃料配给控制系统
公开(公告)号：US06282889B1
公开(公告)日：2001-09-04
申请号：US09516498
申请日：2000-03-01
申请人： Masatomo Kakuyama , Akira Tayama , Hirofumi Tsuchida , Osamu Matsuno
发明人： Masatomo Kakuyama , Akira Tayama , Hirofumi Tsuchida , Osamu Matsuno
IPC分类号： F01N300
CPC分类号： F02D41/0295 , F02D41/1456 , F02D2200/0814 , F02D2200/0816
摘要： In an automotive vehicle with at least one catalyst located in an exhaust passage for adsorbing oxygen contained within exhaust gases entering the catalyst, and an air/fuel ratio sensor located in the exhaust passage upstream of the catalyst for detecting an air/fuel ratio based on a percentage of oxygen contained within the exhaust gases flowing through the exhaust passage and entering the catalyst, an air/fuel ratio control system controls an air/fuel mixture ratio of the engine at as close to stoichiometric as possible, an air/fuel ratio control system calculates a quantity of oxygen stored in the catalyst on the basis of a deviation of the air/fuel ratio detected by the air/fuel ratio sensor from a stoichiometric air/fuel ratio to produce informational data indicative of a calculated value of the quantity of oxygen stored. The control system controls the air/fuel mixture ratio of the engine so that the calculated value of the quantity of oxygen stored is adjusted to a desired value. The control system has a limiter capable of preventing the calculated value of the quantity of oxygen stored from exceeding a specified level.
摘要翻译：在具有位于排气通道中的至少一种催化剂的机动车辆中，用于吸附进入催化剂的废气中所含的氧气;以及空气/燃料比传感器，位于催化剂上游，用于检测空燃比，基于空气/燃料比控制系统控制发动机的空气/燃料混合比在尽可能接近化学计量的空气/燃料比控制系统基于由空气/燃料比传感器检测的空气/燃料比与化学计量空气/燃料比的偏差来计算存储在催化剂中的氧气的量，以产生指示计算值的计算值的信息数据氧气储存。控制系统控制发动机的空气/燃料混合比，使得存储的氧气量的计算值被调节到期望值。控制系统具有限制器，其能够防止存储的氧的量的计算值超过规定的水平。

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