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1.发明授权公开(公告)号：US09222419B2
公开(公告)日：2015-12-29
申请号：US13394931
申请日：2009-10-27
CPC分类号： F02D9/06 , F02D13/08 , F02D41/0087 , F02D41/22 , F02D41/221 , F02D2041/0012 , Y02T10/18 , Y02T10/40
摘要： A control apparatus which is capable of determining an abnormality of a stopping operation of an exhaust valve without using a dedicated sensor for detecting the abnormality in an internal combustion engine including a valve stop mechanism capable of maintaining the exhaust valve and an intake valve in a valve closed state is provided. It is discriminated whether or not there is a change to a rich side of a air fuel ratio of gas detected by a main A/F sensor at the time of a fuel cut for all the cylinders associated with a valve stop request for the exhaust valves and intake valves of all the cylinders. Then, when it is discriminated that there is the change to the rich side of the air fuel ratio of the gas, it is determined that the stopping operation of the exhaust valve is not performed in a normal manner in at least one cylinder.
摘要翻译： 一种控制装置，其能够确定排气门的停止操作的异常，而不使用用于检测内燃机的异常的专用传感器，该内燃机包括能够将排气阀和进气阀保持在阀中的阀止动机构 提供关闭状态。 对与排气门的阀停止请求相关联的所有气缸的燃料切断时是否存在由主A / F传感器检测到的气体的空气燃料比的浓侧有无变化 和所有气缸的进气门。 然后，当鉴别出气体的空燃比的浓侧发生变化时，确定在至少一个气缸中不以正常方式执行排气门的停止操作。
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公开(公告)号：US08989988B2
公开(公告)日：2015-03-24
申请号：US13634055
申请日：2010-03-19
CPC分类号： F02D13/06 , F02D13/0207 , F02D41/0002 , F02D41/126 , F02D41/1454 , F02D41/22 , F02D2041/0012 , F02D2200/0802 , Y02T10/18 , Y02T10/42
摘要： Valve stopping control is performed that changes an operating state of an intake valve and an exhaust valve to a closed-valve stopped state when executing a fuel-cut operation. A device is provided that sets an in-cylinder return-time target air-fuel ratio for an initial two return cycles when returning from a fuel-cut operation. The return-time target air-fuel ratio is set so that respective air-fuel ratios of air-fuel mixtures of fuel and air injected into the same cylinder for respective cycles during the initial return cycles each become values that fall within a combustible range, and so that even if a total amount of fuel injected into the same cylinder for the initial return cycles is supplied into the cylinder during an arbitrary single cycle, the air-fuel ratio of the air-fuel mixture of the total amount of fuel and air becomes a value that falls within the combustible range.
摘要翻译： 执行在执行燃料切断操作时将进气门和排气阀的运行状态改变为闭阀停止状态的阀停止控制。 提供了一种装置，当从燃料切断操作返回时，设定用于初始两个返回循环的缸内返回时间目标空燃比。 返回时间目标空燃比被设定为使得在初始返回循环期间各自循环注入到同一气缸中的燃料和空气的空气燃料混合物的空燃比分别变为落入可燃范围内的值， 并且即使在任意的单个循环中，即使在初始返回循环中喷射到同一气缸中的燃料的总量在任意单个循环中被供应到气缸中，则空气 - 燃料混合物的空燃比燃料和空气的总量 成为落在可燃范围内的值。
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公开(公告)号：US08918267B2
公开(公告)日：2014-12-23
申请号：US13259665
申请日：2009-12-16
IPC分类号： B60T7/12 , G05D1/00 , G06F7/00 , G06F17/00 , F02D13/08 , F02D41/12 , F02D41/08 , F02D41/00 , F02D41/02
CPC分类号： F02D41/123 , F02D13/08 , F02D41/0002 , F02D41/0087 , F02D41/0235 , F02D41/08 , F02D2041/001 , F02D2200/0802 , F02D2200/101 , Y02T10/18 , Y02T10/42
摘要： A control apparatus for an internal combustion engine is provided, the control apparatus being capable of effectively suppressing the inflow of fresh air into a catalyst due to an operational delay of the valve stop mechanism when an execution request for fuel cut is issued. There is provided a valve stop mechanism capable of changing the operational states of intake valves and exhaust valves between a valve operating state and a valve closed/stopped state. The operational states of the intake and exhaust valves are changed into the valve closed/stopped state, if the engine rotational speed decreases to or below a predetermined rotational speed when the engine rotational speed is higher than the predetermined rotational speed in a case where an execution request for fuel cut is detected and the temperature of the catalyst is not lower than a predetermined temperature during operation of an internal combustion engine.
摘要翻译： 提供了一种用于内燃机的控制装置，该控制装置能够在发出执行燃料切断请求时由于阀停止机构的操作延迟而有效地抑制新鲜空气进入催化剂的流入。 提供一种能够在阀操作状态和阀关闭/停止状态之间改变进气门和排气阀的操作状态的阀停止机构。 如果在发动机转速高于预定旋转速度时发动机转速降低到或低于预定旋转速度时，进气门和排气门的操作状态变为阀关闭/停止状态 检测到燃料切断的要求，并且在内燃机运转期间催化剂的温度不低于预定温度。
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公开(公告)号：US08381707B2
公开(公告)日：2013-02-26
申请号：US12682919
申请日：2009-01-27
CPC分类号： F02D41/0295 , F01N11/007 , F02D41/10 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/2454 , F02D2041/1409 , F02D2200/0814 , F02D2200/0816 , Y02T10/47
摘要： Internal combustion engine air-fuel ratio control apparatus and method in which the target air-fuel ratio of exhaust gas flowing into an exhaust-gas purification catalyst unit is controlled through at least proportional-integral control such that the correction amount per unit time of the oxygen amount in said catalyst unit is maintained constant. When the intake air amount is smaller than a predetermined amount and the air-fuel ratio detected by an oxygen sensor provided downstream of the catalyst unit is rich, the target air-fuel ratio is controlled to suppress an increase in the air-fuel ratio in the exhaust-gas purification catalyst unit. Accordingly, even if rapid acceleration operation is performed in a state where the intake air amount is extremely small and the air-fuel ratio detected by the oxygen sensor is rich, NOx in exhaust gas can be sufficiently removed through reduction reactions at the exhaust-gas purification catalyst unit.
摘要翻译： 内燃机空燃比控制装置和方法，其中通过至少比例积分控制来控制流入排气净化催化剂单元的废气的目标空燃比，使得每单位时间的修正量 所述催化剂单元中的氧气量保持恒定。 当进气量小于预定量并且由设置在催化剂单元下游的氧传感器检测到的空燃比变浓时，控制目标空燃比以抑制空燃比的增加 排气净化催化剂单元。 因此，即使在进气量极小并且由氧传感器检测到的空燃比浓的状态下进行快速加速操作，也可以通过废气中的还原反应充分除去废气中的NOx 净化催化剂单元。
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公开(公告)号：US20120022769A1
公开(公告)日：2012-01-26
申请号：US13259665
申请日：2009-12-16
IPC分类号： F02D41/00
CPC分类号： F02D41/123 , F02D13/08 , F02D41/0002 , F02D41/0087 , F02D41/0235 , F02D41/08 , F02D2041/001 , F02D2200/0802 , F02D2200/101 , Y02T10/18 , Y02T10/42
摘要： A control apparatus for an internal combustion engine is provided, the control apparatus being capable of effectively suppressing the inflow of fresh air into a catalyst due to an operational delay of the valve stop mechanism when an execution request for fuel cut is issued. There is provided a valve stop mechanism capable of changing the operational states of intake valves and exhaust valves between a valve operating state and a valve closed/stopped state. The operational states of the intake and exhaust valves are changed into the valve closed/stopped state, if the engine rotational speed decreases to or below a predetermined rotational speed when the engine rotational speed is higher than the predetermined rotational speed in a case where an execution request for fuel cut is detected and the temperature of the catalyst is not lower than a predetermined temperature during operation of an internal combustion engine
摘要翻译： 提供了一种用于内燃机的控制装置，该控制装置能够在发出执行燃料切断请求时由于阀停止机构的操作延迟而有效地抑制新鲜空气进入催化剂的流入。 提供一种能够在阀操作状态和阀关闭/停止状态之间改变进气门和排气阀的操作状态的阀停止机构。 如果在发动机转速高于预定旋转速度时发动机转速降低到或低于预定旋转速度时，进气门和排气门的操作状态变为阀关闭/停止状态 检测到燃料切断的要求，并且在内燃机运转期间催化剂的温度不低于预定温度
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6.发明申请AIR-FUEL RATIO CONTROL APPARATUS AND AIR-FUEL RATIO CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE 审中-公开用于内燃机的空燃比比控制装置和空燃比控制方法公开(公告)号：US20100218485A1
公开(公告)日：2010-09-02
申请号：US12439902
申请日：2007-09-05
申请人： Takahiko Fujiwara , Norihisa Nakagawa , Naoto Kato , Shuntaro Okazaki , Koji Ide
发明人： Takahiko Fujiwara , Norihisa Nakagawa , Naoto Kato , Shuntaro Okazaki , Koji Ide
CPC分类号： F02D41/027 , F01N2570/16 , F02D41/0295 , F02D41/1454 , F02D2200/0814
摘要： A fuel injection amount is controlled so that the air-fuel ratio of exhaust gas flowing into a catalyst (6) oscillates around a stoichiometric air-fuel ratio. When it is estimated that the level of oxygen storage capacity of the catalyst (6) is lower than a predetermined reference capacity, the amplitude of the air-fuel ratio of the exhaust gas which oscillates around the stoichiometric air-fuel ratio is reduced by controlling the fuel injection amount. The level of the oxygen storage capacity of the catalyst (6) is estimated based on the amplitude of the output signal from an oxygen sensor (14) disposed downstream of the catalyst (6).
摘要翻译： 控制燃料喷射量，使得流入催化剂（6）的废气的空燃比围绕化学计量空燃比振荡。 当估计催化剂（6）的储氧能力水平低于预定的参考容量时，围绕理论空燃比振荡的废气的空燃比的幅度通过控制 燃料喷射量。 基于来自设置在催化剂（6）下游的氧传感器（14）的输出信号的振幅来估计催化剂（6）的储氧能力水平。
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公开(公告)号：US07474956B2
公开(公告)日：2009-01-06
申请号：US11885266
申请日：2006-09-13
申请人： Norihisa Nakagawa , Takahiko Fujiwara , Taiga Hagimoto , Junichi Kako , Naoto Kato , Shuntaro Okazaki
发明人： Norihisa Nakagawa , Takahiko Fujiwara , Taiga Hagimoto , Junichi Kako , Naoto Kato , Shuntaro Okazaki
CPC分类号： F02D41/1441 , F01N2560/025 , F01N2560/14 , F02D41/123 , F02D41/1454 , F02D41/1456 , F02D2041/1409 , F02D2041/1422 , F02D2200/0814
摘要： An air-fuel ratio control system maintaining constant an oxygen storage amount or oxygen release amount per unit time with respect to an exhaust purification catalyst having an oxygen storage capacity even if the intake air amount changes is provided.An air-fuel ratio control system of an internal combustion engine having an intake air amount detecting means, a linear air-fuel ratio sensor arranged at an upstream side of an exhaust purification catalyst, an O2 sensor arranged at a downstream side of said exhaust purification catalyst, a target air-fuel ratio controlling means for performing feedback control of a target air-fuel ratio of exhaust flowing into the exhaust purification catalyst based on output information from the intake air amount detecting means and the O2 sensor, and a fuel injection amount controlling means for performing feedback control of the fuel injection amount based on output information of the linear air-fuel ratio sensor so as to achieve the target air-fuel ratio, characterized in that the target air-fuel ratio controlling means performs feedback control of the target air-fuel ratio so that even when the intake air amount changes, a correction amount per unit time of an oxygen storage amount of the exhaust purification catalyst is made constant.
摘要翻译： 即使提供进气量变化，也能够提供相对于具有储氧能力的排气净化催化剂，每单位时间保持恒定氧气储存量或氧释放量的空燃比控制系统。 一种内燃机的空燃比控制系统，具有进气量检测装置，布置在排气净化催化剂的上游侧的线性空燃比传感器，配置在排气净化装置的下游侧的O2传感器 催化剂，目标空燃比控制装置，用于根据来自进气量检测装置和O2传感器的输出信息，对流入排气净化催化剂的排气的目标空燃比进行反馈控制;燃料喷射量 控制装置，用于基于线性空燃比传感器的输出信息进行燃料喷射量的反馈控制，以实现目标空燃比，其特征在于，所述目标空燃比控制装置执行所述目标空燃比控制装置的反馈控制， 目标空燃比，使得即使当进气量变化时，排气的氧气存储量的每单位时间的校正量 净化催化剂保持恒定。
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公开(公告)号：US07349791B2
公开(公告)日：2008-03-25
申请号：US10585668
申请日：2005-10-13
CPC分类号： F02D13/0261 , F02D31/003 , F02D41/005 , F02D41/006 , F02D41/0065 , F02D41/123 , F02D41/1454 , F02D2041/0017 , F02D2041/002 , F02D2200/1015 , F02M26/01 , F02M26/15 , F02M26/28 , F02M26/60 , F02M2026/005 , Y02T10/18 , Y02T10/47
摘要： An acceleration request is detected in accordance with an accelerator opening PA (time t3 in FIG. 5B). If the detected acceleration request is a moderate acceleration request, an idle opening TA0 is set as an actual throttle opening TA (FIG. 5E), and a request for retarding an intake valve timing VVT is issued (FIG. 5D). Recovery from fuel cut-off is achieved at time t4 at which a misfire limit value (combustion assurance VVT value L) is reached by an actual VVT value (FIG. 5A).
摘要翻译： 根据加速器开度PA（图5B中的时间t 3）检测加速请求。 如果检测到的加速请求是中等加速度请求，则将空转开度TA 0设定为实际节气门开度TA（图5E），并且发出延迟进气门正时VVT的请求（图5D）。 在时间t 4，通过实际的VVT值达到失火极限值（燃烧保证VVT值L）（图5A）实现燃料切断的恢复。
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公开(公告)号：US20080041339A1
公开(公告)日：2008-02-21
申请号：US10585668
申请日：2005-10-13
IPC分类号： F02P5/145
CPC分类号： F02D13/0261 , F02D31/003 , F02D41/005 , F02D41/006 , F02D41/0065 , F02D41/123 , F02D41/1454 , F02D2041/0017 , F02D2041/002 , F02D2200/1015 , F02M26/01 , F02M26/15 , F02M26/28 , F02M26/60 , F02M2026/005 , Y02T10/18 , Y02T10/47
摘要： An acceleration request is detected in accordance with an accelerator opening PA (time t3 in FIG. 5B). If the detected acceleration request is a moderate acceleration request, an idle opening TA0 is set as an actual throttle opening TA (FIG. 5E), and a request for retarding an intake valve timing VVT is issued (FIG. 5D). Recovery from fuel cut-off is achieved at time t4 at which a misfire limit value (combustion assurance VVT value L) is reached by an actual VVT value (FIG. 5A).
摘要翻译： 根据加速器开度PA（图5B中的时间t3）检测加速请求。 如果检测到的加速请求是中等加速度请求，则将空转开度TA0设定为实际节气门开度TA（图5E），并且发出延迟进气门正时VVT的请求（图5D）。 在时间t4，通过实际VVT值达到失火极限值（燃烧保证VVT值L）（图5A）实现燃料切断的恢复。
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公开(公告)号：US5834624A
公开(公告)日：1998-11-10
申请号：US867583
申请日：1997-06-02
申请人： Norihisa Nakagawa
发明人： Norihisa Nakagawa
IPC分类号： G01N27/41 , F02D41/06 , F02D41/14 , F02D41/24 , F02D45/00 , G01N27/26 , G01N27/409 , F02D41/00
CPC分类号： F02D41/2474 , F02D41/068 , F02D41/1496 , F02D41/1456 , F02D41/2441 , F02D41/2454
摘要： The device for detecting the air-fuel ratio in an internal combustion engine comprising an air-fuel ratio sensor arranged in an exhaust system of the engine and passes an electric current when an electric voltage is applied thereto, an air-fuel ratio sensor circuit that applies the electric voltage to the sensor, detects the current and outputs a signal proportional to the magnitude of the detected current, and a memory for storing a conversion map for calculating the air-fuel ratio in the engine corresponding to the output of the air-fuel ratio sensor circuit by the use of a reference air-fuel ratio sensor and the reference air-fuel ratio sensor circuit. The device further comprises: a sensor for determining the sensor inactive state when the difference between a first coolant temperature at the last engine stopped time and a second coolant temperature at the next engine start up time is equal to or more than a determined value; and a map for calibrating an air-fuel ratio in the engine calculated from the conversion map stored in the memory in response to the output from the sensor circuit based on the error between the output data of the sensor circuit when the sensor is determined to be in an inactive state by the sensor and the output data from the sensor circuit corresponding to the stoichiometric air-fuel ratio in the engine that is calculated from the conversion map, thereby correctly and very precisely detecting the air-fuel ratio.
摘要翻译： 用于检测内燃机中的空燃比的装置，包括布置在发动机的排气系统中的空燃比传感器，当施加电压时通过电流;空燃比传感器电路， 将电压施加到传感器，检测电流并输出与检测到的电流的大小成比例的信号;以及存储器，用于存储用于计算发动机中对应于空气 - 燃料的输出的空燃比的转换图， 燃料比传感器电路，通过使用参考空燃比传感器和基准空燃比传感器电路。 该装置还包括：传感器，用于当最后发动机停止时间的第一冷却剂温度与下一个发动机启动时间的第二冷却剂温度之间的差等于或大于确定值时，确定传感器非活动状态; 以及映射表，用于根据传感器电路的输出，根据传感器电路的输出数据之间的误差，确定在存储器中存储的转换映射图中计算出的空燃比， 通过传感器处于非活动状态，和来自传感器电路的输出数据对应于从转换图计算的发动机中的理论空燃比，从而正确且非常精确地检测空燃比。
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