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公开(公告)号：US06835357B2
公开(公告)日：2004-12-28
申请号：US09828901
申请日：2001-04-10
申请人： Akira Hashimoto , Kotaro Miyashita
发明人： Akira Hashimoto , Kotaro Miyashita
IPC分类号： B01D5000
CPC分类号： F01N11/007 , F01N2550/03 , F02D41/1456 , F02D41/1495 , Y02T10/47
摘要： An exhaust emission control system for an internal combustion engine having nitrogen oxides removing device provided in an exhaust system of the engine for removing nitrogen oxides in exhaust gases and an oxygen concentration sensor provided downstream of the nitrogen oxides removing device for detecting the concentration of oxygen in the exhaust gases. Deterioration of the nitrogen oxides removing device is determined on the basis of an output of the oxygen concentration sensor after the air-fuel ratio has been changed from the lean region to a rich region with respect to the stoichiometric ratio. Abnormality of the oxygen concentration sensor is determined on the basis of an output of the oxygen concentration sensor during a period in which the air-fuel ratio is kept in the rich region with respect to the stoichiometric ratio immediately after execution of the deterioration determination of the nitrogen oxides removing device.
摘要翻译： 一种用于内燃机的废气排放控制系统，其具有设置在用于除去废气中的氮氧化物的发动机的排气系统中的氮氧化物除去装置，以及设置在氮氧化物除去装置的下游的氧浓度传感器，用于检测氧浓度 废气。 氮氧化物除去装置的劣化是根据空燃比从稀薄区域向化学计量比变化为浓区域之后的氧浓度传感器的输出而求出的。 基于氧浓度传感器的输出，在空气 - 燃料比保持在富区域的时间段内，相对于执行劣化判定之后的化学计量比来确定氧浓度传感器的异常 氮氧化物去除装置。
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公开(公告)号：US06629408B1
公开(公告)日：2003-10-07
申请号：US09685571
申请日：2000-10-11
申请人： Akira Murakami , Mistuo Hashizume , Kotaro Miyashita , Toshikatsu Takanohashi , Yuichiro Tanabe , Akira Hashimoto
发明人： Akira Murakami , Mistuo Hashizume , Kotaro Miyashita , Toshikatsu Takanohashi , Yuichiro Tanabe , Akira Hashimoto
IPC分类号： F01N300
CPC分类号： F01N3/0842 , F01N11/007 , F01N2550/03 , F01N2570/04 , F01N2900/0422 , F02D41/028 , Y02T10/47
摘要： An exhaust emission control system for an internal combustion engine, having a nitrogen oxide removing device provided in an exhaust system of the internal combustion engine for absorbing nitrogen oxides contained in exhaust gases in an exhaust lean condition. The exhaust emission control system includes first and second oxygen concentration sensors respectively provided upstream and downstream of the nitrogen oxide removing device for detecting an oxygen concentration in the exhaust gases. The air-fuel ratio of an air-fuel mixture to be supplied to the engine is changed from a lean region to a rich region with respect to a stoichiometric ratio. An amount of reducing components flowing into the nitrogen oxide removing device from the time when an output value from the first oxygen concentration sensor has changed to a value indicative of a rich air-fuel ratio after enrichment of the air-fuel ratio is calculated. Deterioration of the nitrogen oxide removing device is determined according to the calculated amount of reducing components and an output value from the second oxygen concentration sensor.
摘要翻译： 一种用于内燃机的排气排放控制系统，其具有设置在内燃机的排气系统中的氮氧化物去除装置，用于吸收排气贫化状态下的废气中所含的氮氧化物。 废气排放控制系统包括分别设置在氮氧化物去除装置的上游和下游的用于检测废气中的氧浓度的第一和第二氧浓度传感器。 供给到发动机的空气燃料混合物的空燃比相对于化学计量比从贫区变为浓区。 计算从第一氧浓度传感器的输出值变为表示浓缩空燃比后的浓空燃比的值时流入氮氧化物除去装置的还原成分的量。 根据计算出的还原成分量和来自第二氧浓度传感器的输出值，确定氮氧化物除去装置的劣化。
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公开(公告)号：US5845620A
公开(公告)日：1998-12-08
申请号：US366730
申请日：1994-12-30
CPC分类号： F02P5/1527 , Y02T10/46
摘要： An ignition timing control system for an internal combustion engine that estimates the octane number of the fuel being used based on the state of engine combustion knocking and controls the ignition timing to a value not exceeding the knocking limit. The basic ignition timing is set along the knocking limit of fuel having least octane number and the maximum advance amount is set between the knocking limit and the second knocking limit of fuel having maximum octane number. Octane number is estimated from the occurrence of knocking. On the other hand, upper limit of the estimated octane number is set based on the MBT of the engine such that the estimated octane number is limited with the upper limit. Advance rate is determined based on the estimated octane number and is multiplied to the maximum advance amount to determine an ignition timing correction amount. The ignition timing is finally determined from the basic ignition timing and the ignition timing correction amount. A learning control is conducted for the octane number estimated and the estimated octane number is limited within the learned value.
摘要翻译： 一种用于内燃机的点火正时控制系统，其基于发动机燃烧爆震的状态估计正在使用的燃料的辛烷值，并将点火正时控制到不超过爆震极限的值。 基本点火正时沿着具有最小辛烷值的燃料的爆震极限设定，并且在爆震极限和具有最大辛烷值的燃料的第二爆震极限之间设定最大提前量。 辛烷值估计是从敲击的发生。 另一方面，基于发动机的MBT设定估计辛烷值的上限，使得估计的辛烷值受限于上限。 基于估计的辛烷值确定提前率，并将其乘以最大提前量，以确定点火正时校正量。 点火正时最终由基本点火正时和点火正时校正量确定。 对于估计的辛烷值进行学习控制，并且在学习值内限制估计的辛烷值。
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公开(公告)号：US08823204B2
公开(公告)日：2014-09-02
申请号：US13036771
申请日：2011-02-28
申请人： Paul DeHart , Takahide Mizuno , Hirokazu Toyoshima , Masanori Ohara , Joji Hijikata , Kazuhiko Imamura , Kotaro Miyashita
发明人： Paul DeHart , Takahide Mizuno , Hirokazu Toyoshima , Masanori Ohara , Joji Hijikata , Kazuhiko Imamura , Kotaro Miyashita
摘要： An electric load system and method for a vehicle includes an electric load, electric devices, an electrically driven element operating in an operating state, an electric load detector to measure an electric load generated by the electric devices, and an electric control unit communicating with the electric load detector and the electrically driven element to determine an electric load of the electric load system. The method includes estimating an electric load of the electrically driven element based on an operating state of the electrically driven element via the electric control unit and adding the electric load from the electrically driven element to an electric load measured by the electric load detector.
摘要翻译： 一种用于车辆的电力负载系统和方法，包括电力负载，电气装置，在运行状态下工作的电动元件，用于测量由电气装置产生的电力负载的电力负载检测器，以及与该电气装置通信的电气控制单元 电负载检测器和电驱动元件，以确定电负载系统的电负载。 该方法包括基于电动元件的电动控制单元的运行状态来估计电动元件的电负载，并且将来自电驱动元件的电负载加到由电负载检测器测量的电负载。
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公开(公告)号：US5954028A
公开(公告)日：1999-09-21
申请号：US908676
申请日：1997-08-07
CPC分类号： F02D41/1498 , F02D41/1475 , F02D41/2454 , F02D2200/1015 , F02D41/1456
摘要： An air-fuel ratio control system for an internal combustion engine includes an air-fuel ratio sensor arranged in an exhaust system thereof for generating an output substantially proportional in value to an air-fuel ratio of exhaust gases emitted from the engine. An amount of variation in combustion of the engine is detected. A desired air-fuel ratio of a mixture supplied to the engine is set to a value leaner than a stoichiometric air-fuel ratio based on the amount of variation in combustion of the engine, when the engine is in a predetermined operating condition. Feedback control of an air-fuel ratio of the mixture to the desired air-fuel ratio is carried out in response to the output from the air-fuel ratio sensor. The desired air-fuel ratio is set to a richer value than an immediately preceding value thereof when the amount of variation in combustion of the engine detected is large and to a leaner value than the immediately preceding value thereof when the amount of variation in combustion of the engine is small. A value of the desired air-fuel ratio set is learned as an actual lean limit of the air-fuel ratio for stable combustion of the engine. A rate of change of the desired air-fuel ratio is adjusted based on the learned value of the desired air-fuel ratio.
摘要翻译： 用于内燃机的空燃比控制系统包括布置在其排气系统中的空燃比传感器，用于产生与从发动机排放的废气的空燃比基本成正比的输出。 检测发动机的燃烧变化量。 当发动机处于预定操作状态时，提供给发动机的混合物的期望空燃比被设定为比基于发动机燃烧变化量的化学计量空燃比更稀薄的值。 响应于空燃比传感器的输出，进行混合物的空燃比对所需空燃比的反馈控制。 当所检测的发动机的燃烧变化量大时，所需的空燃比被设定为比其前一值更丰富的值，当燃烧变化量为 发动机很小 将所需空燃比设定的值作为用于发动机稳定燃烧的空燃比的实际稀薄极限来获知。 基于所需空燃比的学习值来调整所需空燃比的变化率。
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公开(公告)号：US5941224A
公开(公告)日：1999-08-24
申请号：US902274
申请日：1997-07-29
CPC分类号： F02D41/1456 , F02D41/0042 , F02D2041/1409 , F02D2041/1422 , F02D2200/0406 , F02D2200/0414 , F02M25/08
摘要： An air-fuel ratio control system for an internal combustion engine includes an air-fuel ratio sensor arranged in the exhaust system of the engine, for generating an output indicative of the air-fuel ratio of exhaust gases emitted from the engine. An ECU carries out feedback control of controlling the air-fuel ratio of a mixture supplied to the engine to a predetermined desired air-fuel ratio in response to the output from the air-fuel ratio sensor, by using at least one feedback control gain. A purge control valve purges evaporative fuel generated in the fuel tank to the engine. The at least one feedback control gain is set to a smaller value when the degree of influence of evaporative fuel purged by the purge control valve upon the air-fuel ratio of the mixture is larger, and set to a larger value when the degree of influence of the purged evaporative fuel upon the air-fuel ratio of the mixture is smaller.
摘要翻译： 用于内燃机的空燃比控制系统包括布置在发动机的排气系统中的空燃比传感器，用于产生表示从发动机排出的废气的空燃比的输出。 ECU通过使用至少一个反馈控制增益来执行响应于来自空燃比传感器的输出而将供给发动机的混合物的空燃比控制到预定的期望空燃比的反馈控制。 净化控制阀清除燃料箱中产生的蒸汽燃料到发动机。 当由清洗控制阀吹扫的蒸发燃料对混合气的空燃比的影响程度较大时，将至少一个反馈控制增益设定为较小的值，当影响程度 被排出的蒸发燃料的混合物的空燃比较小。
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公开(公告)号：US06839637B2
公开(公告)日：2005-01-04
申请号：US10146042
申请日：2002-05-16
IPC分类号： F02D45/00 , F01N3/08 , F01N3/20 , F01N3/22 , F01N3/28 , F01N11/00 , F02D13/02 , F02D41/02 , F02D41/04 , F02D41/14 , G01N31/00
CPC分类号： F01N3/101 , F01N3/0842 , F01N11/007 , F01N2550/02 , F01N2550/03 , F01N2900/0422 , F02D41/028 , Y02T10/22 , Y02T10/47 , Y10T477/663
摘要： An exhaust emission control system for an internal combustion engine is disclosed. The system includes a NOx removing device provided in an exhaust system of the engine for removing NOx contained in exhaust gases, and an oxygen concentration sensor provided in the exhaust system. The air-fuel ratio of the air-fuel mixture to be supplied to the engine is changed from a value which is leaner than the stoichiometric ratio to a value which is richer than the stoichiometric ratio. It is determined whether or not a sulfur oxide concentration in the exhaust gases is high according to a transient characteristic of an oxygen concentration detected by the oxygen concentration sensor after the air-fuel ratio is changed.
摘要翻译： 公开了一种用于内燃机的废气排放控制系统。 该系统包括设置在发动机的排气系统中的用于去除废气中所含的NOx的NOx去除装置，以及设置在排气系统中的氧浓度传感器。 供给到发动机的空气燃料混合物的空燃比从比化学计量比更稀的值变为比化学计量比更浓的值。 根据在空燃比变化后由氧浓度传感器检测到的氧浓度的瞬态特性，确定排气中的硫氧化物浓度是否高。
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公开(公告)号：US5724952A
公开(公告)日：1998-03-10
申请号：US660390
申请日：1996-06-07
申请人： Kotaro Miyashita , Hirofumi Mutoh , Katsushi Watanabe , Yukio Noda , Fumio Hara
发明人： Kotaro Miyashita , Hirofumi Mutoh , Katsushi Watanabe , Yukio Noda , Fumio Hara
CPC分类号： F02D41/1495 , F02D41/1441 , F02D41/1474 , F02B2275/18 , F02D2041/1409 , F02D41/1456
摘要： There is provided an air-fuel ratio control system for an internal combustion engine. The air-fuel ratio control system has an air-fuel ratio sensor arranged in an exhaust passage of the engine, which generates an output proportional to concentration of oxygen in exhaust gases emitted from the engine. The air-fuel ratio of a mixture supplied to the engine is controlled to a desired air-fuel ratio in response to the output from the air-fuel ratio sensor by the use of a proportional term and an integral term. A repetition period of inversion of the output from the air-fuel ratio sensor with respect to a predetermined reference value is calculated. Deterioration of the air-fuel ratio sensor is detected based the repetition period of inversion of the output from the air-fuel ratio sensor.
摘要翻译： 提供了一种用于内燃机的空燃比控制系统。 空燃比控制系统具有布置在发动机的排气通道中的空燃比传感器，其产生与从发动机排出的废气中的氧浓度成比例的输出。 通过使用比例项和积分项，供给发动机的混合物的空燃比响应于来自空燃比传感器的输出而被控制到期望的空燃比。 计算空燃比传感器的输出相对于预定基准值的反转重复周期。 基于来自空燃比传感器的输出的反转的重复周期来检测空燃比传感器的劣化。
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公开(公告)号：US5482020A
公开(公告)日：1996-01-09
申请号：US322086
申请日：1994-10-12
CPC分类号： F02D41/0072 , F02P5/1516 , F02B2275/18 , Y02T10/46 , Y02T10/47
摘要： A control system for an internal combustion engine includes an exhaust gas recirculation passage extending between the intake system and the exhaust system, for recirculating part of exhaust gases emitted from the engine, an EGR valve for controlling a flow rate of exhaust gases to be recirculated through the exhaust gas recirculation passage, and an ECU which detects an operating condition of the EGR valve, and calculates an amount of fuel to be injected, based on operating conditions of the engine. Further, the ECU calculates dynamic characteristics of the exhaust gases to be recirculated, based on operating conditions of the engine, a virtual operation amount of the EGR valve, based on the dynamic characteristics, a recirculation rate of exhaust gases, based on the virtual operation amount as well as operating conditions of the engine, and a recirculation rate of inert gases present in exhaust gases to be recirculated, based on the exhaust gas recirculation rate as well as the concentration of oxygen present in the exhaust gases, and corrects the amount of the fuel to be injected, based on the inert gas recirculation rate.
摘要翻译： 用于内燃机的控制系统包括在进气系统和排气系统之间延伸的废气再循环通道，用于使从发动机排出的废气的一部分再循环; EGR阀，用于控制废气的再循环流量 废气再循环通道和ECU，其检测EGR阀的运行状态，并根据发动机的运转条件计算出喷射的燃料量。 此外，基于动态特性，基于虚拟动作的排气的再循环率，ECU基于发动机的运转条件，EGR阀的虚拟运转量，计算要再循环的废气的动态特性 基于废气再循环速率以及存在于废气中的氧浓度，存在于要再循环的废气中的惰性气体的再循环速率以及存在于排气中的氧气的浓度， 基于惰性气体再循环速率喷射的燃料。
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公开(公告)号：US5884477A
公开(公告)日：1999-03-23
申请号：US012186
申请日：1998-01-23
CPC分类号： F01N9/005 , F02D41/0235 , F02D41/1446 , F02D2200/0804 , Y02T10/47
摘要： A fuel supply control system for an internal combustion engine has an exhaust gas-purifying device arranged in the exhaust system of the engine. When a predetermined high load condition of the engine is detected, an amount of fuel supplied to the engine is increased. Temperature values indicative of the temperature of the exhaust gas-purifying device are stored and a stored temperature value is read out according to operating conditions of the engine. A correction coefficient for correcting the read-out temperature value is determined, and the temperature of the exhaust gas-purifying device is estimated based on the read-out temperature value and the determined correction coefficient. When the predetermined high load condition is detected and at the same time the estimated temperature is higher than a predetermined temperature value, the amount of fuel supplied to the engine is actually increased.
摘要翻译： 用于内燃机的燃料供应控制系统具有布置在发动机的排气系统中的排气净化装置。 当检测到发动机的预定的高负载状态时，提供给发动机的燃料量增加。 存储表示排气净化装置的温度的温度值，根据发动机的运转条件读出存储的温度值。 确定用于校正读出温度值的校正系数，并且基于读出的温度值和确定的校正系数来估计排气净化装置的温度。 当检测到预定的高负载条件并且同时估计的温度高于预定的温度值时，实际上提供给发动机的燃料量增加。
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