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公开(公告)号：US20140303875A1
公开(公告)日：2014-10-09
申请号：US14355045
申请日：2011-11-02
IPC分类号： F02D41/00
CPC分类号： F02D41/003 , F01M13/00 , F02D19/084 , F02D41/0005 , F02D41/123 , F02D2041/001 , F02D2250/08 , F02D2250/11 , F02M25/06 , Y02T10/36 , Y02T10/42
摘要： It is an object of this invention to restrain blow-by gas from reaching a catalyst during fuel cutoff, and protect the catalyst while coping with an increase in oil dilution amount resulting from the use of alcohol fuel, in an internal combustion engine that uses the alcohol fuel. An engine is equipped with a PCV mechanism that introduces blow-by gas in a crankcase into an intake system. Besides, when fuel cutoff is executed with the PCV mechanism in operation, an opening degree of a throttle valve during fuel cutoff is set on the basis of an oil dilution amount in lubricating oil. Thus, the throttle opening degree during fuel cutoff is adjusted in accordance with a generation amount of blow-by gas, so that an intake negative pressure can be appropriately reduced. Accordingly, during fuel cutoff, the amount of blow-by gas that is sucked out from the crankcase due to the intake negative pressure and introduced into the intake system can be held small.
摘要翻译： 本发明的一个目的是在燃料切断期间抑制窜气气体到达催化剂，并且在应用使用醇燃料的内燃机中由于使用醇燃料引起的油稀释量的增加的同时保护催化剂 酒精燃料。 发动机配备有PCV机构，其将曲轴箱中的窜气引入进气系统。 此外，当在运行中的PCV机构执行燃油切断时，基于润滑油中的油稀释量来设定燃料切断期间的节气门的开度。 因此，根据窜气的产生量调节燃料切断期间的节气门开度，能够适当地减小进气负压。 因此，在燃料切断期间，可以将由于进气负压而被引入到进气系统中的从曲轴箱吸出的窜气的量保持较小。
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公开(公告)号：US20130338904A1
公开(公告)日：2013-12-19
申请号：US13980467
申请日：2011-01-18
IPC分类号： F02D41/00
CPC分类号： F02D41/00 , F01N3/101 , F01N3/105 , F02D41/0295 , F02D41/126 , F02D41/1439 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D2200/0814 , Y02T10/22
摘要： An air-fuel ratio control apparatus for an internal combustion engine of the present invention determines whether or not a lean request has occurred, based on a comparison between a value correlating with an output value of the downstream air-fuel ratio sensor disposed downstream of the catalyst (downstream air-fuel ratio sensor output correlating value) and a predetermined lean request determining value, and determines whether or not a rich request has occurred, based on a comparison between the downstream air-fuel ratio sensor output correlating value and a predetermined rich request determining value. Further, the air-fuel ratio control apparatus calculates a total amount of oxygen (released oxygen amount) released from the catalyst in the rich request occurring period, and calculates an integrated value (present stored oxygen amount) of oxygen stored in the catalyst after a start of the lean request occurring period which follows the rich request occurring period. The apparatus changes the rich request determining value in such a manner that a point in time at which it is determined that the rich request has occurred comes much earlier as the present stored oxygen amount comes closer to the released oxygen amount.
摘要翻译： 本发明的用于内燃机的空燃比控制装置基于与下游空燃比传感器的输出值相关联的值的比较来确定是否发生了精益请求， 催化剂（下游空燃比传感器输出相关值）和预定的稀薄要求确定值，并且基于下游空燃比传感器输出相关值和预定浓度之间的比较来确定是否发生了丰富请求 请求确定值。 此外，空燃比控制装置计算在富请求发生期间从催化剂释放的氧的总量（释放氧量），并计算在催化剂中存储的氧的积分值（存储的氧量） 紧随需求发生期的精益发送期的开始。 该装置以这样一种方式改变富请求确定值，使得确定富请求已经发生的时间点早于当前存储的氧量接近释放的氧量。
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公开(公告)号：US20130179051A1
公开(公告)日：2013-07-11
申请号：US13825705
申请日：2010-09-24
IPC分类号： F02D41/02
CPC分类号： F02D41/0235 , F01N13/008 , F01N13/0093 , F01N2560/025 , F02D17/02 , F02D41/0085 , F02D41/1441 , F02D41/1454 , F02D41/1458 , F02D41/1463 , F02D41/2454 , Y02T10/22
摘要： An embodiment (control apparatus) of an air-fuel ratio control apparatus according to the present invention determines, based on an output value Voxs of a downstream air-fuel ratio sensor 56 disposed at a position downstream of a three-way catalyst 43, which air-fuel request is occurring, a rich request or a lean request. The control apparatus sets an air-fuel ratio of each cylinder (cylinder-by-cylinder air-fuel ratio) to a rich air-fuel ratio when the rich request is occurring, and sets the cylinder-by-cylinder air-fuel ratio to a lean air-fuel ratio when the lean request is occurring. The control apparatus has a cylinder-by-cylinder air-fuel ratio of a specific cylinder different from a cylinder-by-cylinder air-fuel ratio of the other cylinder so as to obtain a fluctuation period correlated value indicative of a fluctuation of the output value Voxs of the downstream air-fuel ratio sensor 56, and determines an influence/impact degree on the output value of the downstream air-fuel ratio sensor of an exhaust gas discharged from each of a plurality of cylinders, based on the fluctuation period correlated value. Further, the control apparatus controls the air-fuel ratio of each cylinder in accordance with the influence degree.
摘要翻译： 根据本发明的空燃比控制装置的一个实施例（控制装置）基于设置在三元催化剂43下游的下游空燃比传感器56的输出值Voxs， 空气燃料请求正在发生，丰富的请求或精益请求。 控制装置在发生丰满请求时将各气缸的空燃比（气缸/空气比）逐个设定为浓空燃比，并且将逐缸空燃比设定为 在发生精益请求时的贫空燃比。 所述控制装置具有与所述另一个气缸的与所述气缸的空燃比不同的特定气缸的逐缸空燃比，以获得表示所述输出的波动的波动周期相关值 下游空燃比传感器56的Vox值，并且基于波动周期相关地确定对从多个气缸中的每一个排出的排气的下游空燃比传感器的输出值的影响/冲击程度 值。 此外，控制装置根据影响程度来控制各气缸的空燃比。
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公开(公告)号：US08464522B2
公开(公告)日：2013-06-18
申请号：US12671085
申请日：2008-10-27
IPC分类号： F01N3/00
CPC分类号： F02D41/0255 , F02D41/029 , Y02T10/22 , Y02T10/26
摘要： An exhaust passage of an internal combustion engine is provided with an upstream side three-way catalyst capable of purifying exhaust gas and a particulate filter (PM filter) for trapping particulate matter PM contained in exhaust gas. Catalyst warm-up control is exercised for the purpose of warming up mainly the upstream side three-way catalyst at cold start. Filter regeneration control for removing the particulate matter PM accumulating on the particulate filter from the filter is exercised at the cold start after the catalyst warm-up control is exercised.
摘要翻译： 内燃机的排气通路设置有能够净化排气的上游侧三通催化剂和用于捕集废气中所含的颗粒物质PM的微粒过滤器（PM过滤器）。 催化剂预热控制主要用于在冷启动时预热上游侧三元催化剂。 在进行催化剂预热控制之后的冷启动时，进行从过滤器中除去颗粒物过滤器上累积的颗粒物质PM的过滤器再生控制。
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公开(公告)号：US20120060805A1
公开(公告)日：2012-03-15
申请号：US13320666
申请日：2009-05-21
申请人： Tomohiro Nakano , Takahiko Fujiwara
发明人： Tomohiro Nakano , Takahiko Fujiwara
IPC分类号： F02D41/14
CPC分类号： F02D41/0235 , F01N13/009 , F02D41/1441
摘要： A air-fuel ratio control apparatus, applied to an internal combustion engine having a catalyst disposed in an exhaust passage of the engine, includes a downstream air-fuel ratio sensor (oxygen concentration cell type oxygen concentration sensor) disposed at a position downstream of the catalyst, and air-fuel ratio control means for controlling, based on an output value of the downstream air-fuel ratio sensor, an air-fuel ratio of a mixture supplied to the engine so as to change an air-fuel ratio of a catalyst inflow gas. Further, the air-fuel ratio control means controls the air-fuel ratio of the mixture supplied to the engine.
摘要翻译： 应用于具有设置在发动机的排气通路中的催化剂的内燃机的空燃比控制装置包括下游空燃比传感器（氧浓度电池型氧浓度传感器），位于下游的位置 催化剂和空燃比控制装置，用于基于下游空燃比传感器的输出值控制供给发动机的混合物的空燃比，以改变催化剂的空燃比 流入气体。 此外，空燃比控制装置控制供给到发动机的混合物的空燃比。
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公开(公告)号：US20120023913A1
公开(公告)日：2012-02-02
申请号：US13060359
申请日：2009-04-16
申请人： Mamoru Yoshioka , Takahiko Fujiwara , Ryota Onoe
发明人： Mamoru Yoshioka , Takahiko Fujiwara , Ryota Onoe
IPC分类号： F02D43/00
CPC分类号： F01N11/007 , F01N11/002 , F01N2550/02 , F01N2560/025 , Y02T10/47
摘要： The air-fuel ratio of exhaust gas supplied to a catalyst is alternately and actively switched between a rich state value and a lean state value. In conjunction with the performance of this active air-fuel ratio control, the oxygen storage capacity of the catalyst is measured. Whether the catalyst is normal or abnormal is determined by comparing the measured value of the oxygen storage capacity with a predetermined determination value. The temperature of the catalyst is acquired, and the determination value is set based on the acquired catalyst temperature. The determination value is set so as to decreases with increasing catalyst temperature when the catalyst temperature is equal to or higher than a predetermined temperature.
摘要翻译： 供给到催化剂的废气的空燃比在富状态值和稀态值之间交替地主动地切换。 结合该主动空燃比控制的性能，测量催化剂的储氧能力。 通过将储氧容量的测量值与预定的确定值进行比较来确定催化剂是正常还是异常。 获得催化剂的温度，并且基于获得的催化剂温度来设定测定值。 当催化剂温度等于或高于预定温度时，确定值被设定为随着催化剂温度的升高而降低。
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公开(公告)号：US20060254257A1
公开(公告)日：2006-11-16
申请号：US11432404
申请日：2006-05-12
申请人： Takahiko Fujiwara
发明人： Takahiko Fujiwara
CPC分类号： F02D41/1454 , F01N11/007 , F01N2550/02 , F02D41/1475 , F02D41/1495 , F02D2041/228 , F02D2200/0816 , Y02T10/47
摘要： A target air-fuel ratio of exhaust gas is changed back and forth between rich and lean in short periods, and it is determined that the catalyst is degraded when the air-fuel ratio of exhaust gas is lean by the time a predetermined period of time has passed from the time the target air-fuel ratio started to be changed.
摘要翻译： 废气的目标空燃比在短时间内在浓缩和稀薄之间变化地变化，并且确定当排气的空燃比在预定时间段内变稀时催化剂劣化 从目标空燃比开始变为通过。
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公开(公告)号：US20150152793A1
公开(公告)日：2015-06-04
申请号：US14383963
申请日：2012-03-22
CPC分类号： F02D13/0203 , F01N3/2006 , F02B2075/125 , F02D13/0215 , F02D15/00 , F02D17/00 , F02D19/084 , F02D19/087 , F02D41/0245 , F02D41/123 , F02D41/126 , F02D2041/001 , F02D2200/021 , F02D2200/0802 , Y02T10/12 , Y02T10/18 , Y02T10/26 , Y02T10/36
摘要： An engine includes variable valve mechanisms and a variable compression ratio mechanism. An ECU executes temperature balance control when a fuel-cut operation is executed. In the temperature balance control, valve opening characteristics of an exhaust valve are controlled based on a magnitude relation between an actual catalyst temperature and a target catalyst temperature and a magnitude relation between a water temperature and a required cylinder wall temperature. When executing a fuel-cut operation, it is thereby possible to control both the actual catalyst temperature and the water temperature in a well-balanced manner so that the actual catalyst temperature falls within a temperature range suitable for operation of the catalysts, and the water temperature becomes close to the required cylinder wall temperature.
摘要翻译： 发动机包括可变气门机构和可变压缩比机构。 当执行燃料切断操作时，ECU执行温度平衡控制。 在温度平衡控制中，基于实际催化剂温度和目标催化剂温度之间的大小关系以及水温与所需的气缸壁温度之间的大小关系来控制排气门的开阀特性。 在进行燃料切断动作的情况下，能够以均衡的方式控制实际的催化剂温度和水温，使得实际的催化剂温度落在适合于催化剂的运转的温度范围内， 温度变得接近所需的气缸壁温度。
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公开(公告)号：US08949000B2
公开(公告)日：2015-02-03
申请号：US13626515
申请日：2012-09-25
CPC分类号： F02D41/008 , F02D41/126 , F02D2250/21
摘要： A control device for an internal combustion engine performs rich control when a fuel cutoff operation is terminated and fuel supply to a combustion chamber is restarted, and the engine includes a plurality of the combustion chambers and a fuel supply cycle is repeated. The control device includes a controller configured to set a first moment and a second moment such that the fuel supply cycle which includes the first moment is different from the fuel supply cycle which includes the second moment, the first moment being a moment at which the rich control is started in a first combustion chamber of the plurality of combustion chambers, and the second moment being a moment at which the rich control is started in a second combustion chamber of the plurality of combustion chambers that is different from the first combustion chamber.
摘要翻译： 当燃料切断操作终止并且燃料供应到燃烧室重新启动时，用于内燃机的控制装置执行丰富的控制，并且发动机包括多个燃烧室并且重复燃料供给循环。 控制装置包括：控制器，其被配置为设定第一时刻和第二时刻，使得包括第一时刻的燃料供应循环与包括第二时刻的燃料供给循环不同，第一时刻是富时 控制在多个燃烧室的第一燃烧室中开始，第二时刻是在与第一燃烧室不同的多个燃烧室中的第二燃烧室中开始浓控制的时刻。
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公开(公告)号：US20140283504A1
公开(公告)日：2014-09-25
申请号：US14117440
申请日：2011-05-16
IPC分类号： F01N3/10
CPC分类号： F01N3/10 , F01N3/101 , F02D41/0295 , F02D41/10 , F02D41/1441 , F02D41/1454 , F02D41/1456 , F02D41/18 , F02D41/187 , F02D2041/1412 , F02D2200/501 , Y02A50/2324 , Y02T10/22
摘要： An air-fuel ratio control apparatus for an internal combustion engine according to an embodiment of the invention (the present control apparatus) sets a target air-fuel ratio to a target rich air-fuel ratio when it is determined on the basis of the output value Voxs of a downstream air-fuel ratio sensor 67 that the oxygen adsorption amount of a catalyst 43 tends to be excessive, and sets the target air-fuel ratio to a target lean air-fuel ratio when it is determined on the basis of the output value Voxs that the oxygen adsorption amount of the catalyst 43 tends to be insufficient. Further, the present control apparatus determines whether or not an operation state in which a large amount of nitrogen oxide flows into the catalyst 43 is reached on the basis of “whether a predetermined condition is fulfilled”, and makes the target rich air-fuel ratio obtained when the predetermined condition is fulfilled less than the target rich air-fuel ratio obtained when the predetermined condition is not fulfilled. As a result, the concentration of a reducing agent inside the catalyst 43 can be increased before a large amount of NOx flows into the catalyst 43. Therefore, when a large amount of NOx flows into the catalyst 43, most of the NOx can be eliminated.
摘要翻译： 根据本发明的实施例的内燃机的空燃比控制装置（本控制装置）在基于输出确定目标空燃比时，将目标空燃比设定为目标浓空燃比 下游空燃比传感器67的值Voxs，催化剂43的氧吸附量倾向于过大，并且当基于该催化剂43确定目标空燃比时，将目标空燃比设定为目标稀燃比 输出值Vox，催化剂43的氧吸附量趋于不足。 此外，本控制装置基于“是否满足预定条件”来确定是否达到大量氮氧化物流入催化剂43的操作状态，并且使目标浓空燃比 当预定条件满足小于当不满足预定条件时获得的目标浓空燃比时获得的。 结果，在大量的NOx流入催化剂43之前，可以增加催化剂43内的还原剂的浓度。因此，当大量的NO x流入催化剂43时，可以消除大部分的NOx 。
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