公开(公告)号：US08428850B2

公开(公告)日：2013-04-23

申请号：US12746426

申请日：2008-10-31

申请人： Mitsuhiro Nada ,  Akio Matsunaga ,  Yasuyuki Terada ,  Makio Tsuchiyama

发明人： Mitsuhiro Nada ,  Akio Matsunaga ,  Yasuyuki Terada ,  Makio Tsuchiyama

IPC分类号： F02B3/00

CPC分类号： F02D41/403 ,  F02D2250/18 ,  F02D2250/36 ,  Y02T10/44

摘要： In one embodiment, a total fuel injection amount is calculated from a torque required by an engine. A division ratio of a pre-injection amount that achieves both suppression of ignition delay of fuel from a main injection and suppression of a peak value of a heat production ratio of combustion from the main injection is calculated. Upper and lower limit guards are given to the obtained divided amount, and the divided injection amount is calculated. The injection amount of the main injection is obtained by subtracting the divided injection amount from the total fuel injection amount.

摘要翻译： 在一个实施例中，根据发动机所需的扭矩计算总燃料喷射量。 计算实现抑制来自主喷射的燃料点火延迟的预喷射量的分压比，以及抑制来自主喷射的燃烧热产生率的峰值。 上限和下限值被赋予所获得的分割量，并且计算分割的喷射量。 通过从总燃料喷射量减去分割喷射量来获得主喷射的喷射量。

公开(公告)号：US08307695B2

公开(公告)日：2012-11-13

申请号：US12678828

申请日：2009-02-05

申请人： Takeshi Miyaura ,  Yasuyuki Terada ,  Akio Matsunaga

发明人： Takeshi Miyaura ,  Yasuyuki Terada ,  Akio Matsunaga

IPC分类号： G01M15/00

CPC分类号： F02D41/0025 ,  F02D19/061 ,  F02D19/0636 ,  F02D19/0649 ,  F02D35/025 ,  F02D35/026 ,  F02D41/0007 ,  F02D41/123 ,  F02D41/1498 ,  F02D41/2422 ,  F02D41/402 ,  F02D2200/0612 ,  Y02T10/36

摘要： A cetane number estimation method is provided in which: the preliminary injection is preformed multiple times at different compression end temperatures with a fuel tank (26) containing fuel having a predetermined cetane number, and an engine torque increase caused by each preliminary injection is calculated and the relation between the compression end temperatures at the respective preliminary injections and the engine torque increases caused by the respective preliminary injections is determined; the compression end temperature and the engine torque increase at a predetermined reference point on the relation are recorded as a basic compression eng temperature and a basic engine toque increase; the preliminary injection is performed at the basic compression end temperature and an engine torque increase caused by this preliminary injection is calculated; and the cetane number of fuel is estimated based on the relation between the calculated engine torque increase and the basic engine torque increase.

摘要翻译： 提供一种十六烷值估计方法，其中：在具有预定十六烷值的燃料的燃料箱（26）中，在不同的压缩终止温度下进行多次预备喷射，并且计算由每次预喷射引起的发动机转矩增加， 确定各个预喷射时的压缩终止温度与由各个预喷射引起的发动机转矩增加之间的关系; 关系上的预定基准点处的压缩结束温度和发动机转矩增加被记录为基本压缩ENG温度和基本发动机转矩增加; 在基本压缩终止温度下进行预喷射，并计算由该预喷射引起的发动机转矩增加; 并且基于计算的发动机转矩增加与基本发动机转矩增加之间的关系来估计燃料的十六烷值。

公开(公告)号：US20100319444A1

公开(公告)日：2010-12-23

申请号：US12678828

申请日：2009-02-05

申请人： Takeshi Miyaura ,  Yasuyuki Terada ,  Akio Matsunaga

发明人： Takeshi Miyaura ,  Yasuyuki Terada ,  Akio Matsunaga

IPC分类号： G01M15/04

CPC分类号： F02D41/0025 ,  F02D19/061 ,  F02D19/0636 ,  F02D19/0649 ,  F02D35/025 ,  F02D35/026 ,  F02D41/0007 ,  F02D41/123 ,  F02D41/1498 ,  F02D41/2422 ,  F02D41/402 ,  F02D2200/0612 ,  Y02T10/36

摘要： A cetane number estimation method is provided in which: the preliminary injection is preformed multiple times at different compression end temperatures with a fuel tank (26) containing fuel having a predetermined cetane number, and an engine torque increase caused by each preliminary injection is calculated and the relation between the compression end temperatures at the respective preliminary injections and the engine torque increases caused by the respective preliminary injections is determined; the compression end temperature and the engine torque increase at a predetermined reference point on the relation are recorded as a basic compression eng temperature and a basic engine toque increase; the preliminary injection is performed at the basic compression end temperature and an engine torque increase caused by this preliminary injection is calculated; and the cetane number of fuel is estimated based on the relation between the calculated engine torque increase and the basic engine torque increase.

摘要翻译： 提供一种十六烷值估计方法，其中：在具有预定十六烷值的燃料的燃料箱（26）中，在不同的压缩终止温度下进行多次预备喷射，并且计算由每次预喷射引起的发动机转矩增加， 确定各个预喷射时的压缩终止温度与由各个预喷射引起的发动机转矩增加之间的关系; 关系上的预定基准点处的压缩结束温度和发动机转矩增加被记录为基本压缩ENG温度和基本发动机转矩增加; 在基本压缩终止温度下进行预喷射，并计算由该预喷射引起的发动机转矩增加; 并且基于计算的发动机转矩增加与基本发动机转矩增加之间的关系来估计燃料的十六烷值。

公开(公告)号：US20100300068A1

公开(公告)日：2010-12-02

申请号：US12808571

申请日：2009-03-12

申请人： Hiroshi Enomoto ,  Akio Matsunaga

发明人： Hiroshi Enomoto ,  Akio Matsunaga

IPC分类号： F02B27/04

CPC分类号： F02D41/1494 ,  F02D41/1446 ,  F02D41/187 ,  F02D41/222 ,  F02D2200/0414 ,  F02D2200/0418

摘要： In an exhaust gas sensor control system and control method, the exhaust pipe wall temperature is estimated based on the measured exhaust gas temperature measured, the exhaust gas flowrate, and the measured outside air temperature, with reference to a supplied heat quantity calculation map, wall temperature added value map, and a wall temperature subtracted value map. Then the dew-point of the exhaust pipe is calculated based on the air-fuel ratio of the air flow amount to the weight of fuel, and a condensed water added amount is calculated based on the relative wall temperature and the exhaust gas flow amount. The amount of condensed water is then estimated by summing the calculated condensed water added amounts.

摘要翻译： 在废气传感器控制系统和控制方法中，基于所测量的废气温度，废气流量和测量的外部空气温度，参考所提供的热量计算图，壁，估计排气管壁温度 温度附加值图和壁温度相减值图。 然后，基于空气流量与燃料重量的空燃比计算出排气管的露点，并且基于相对壁温度和废气流量计算冷凝水添加量。 然后通过将计算的冷凝水添加量相加来估计冷凝水的量。

公开(公告)号：US20100199639A1

公开(公告)日：2010-08-12

申请号：US12678817

申请日：2008-09-16

申请人： Akio Matsunaga ,  Shigeki Nakayama ,  Tomomi Onishi ,  Akiyuki Iemura

发明人： Akio Matsunaga ,  Shigeki Nakayama ,  Tomomi Onishi ,  Akiyuki Iemura

IPC分类号： F02M25/07 ,  F02D41/14 ,  G01M15/10

CPC分类号： F02D41/1445 ,  F01N3/0814 ,  F01N3/0821 ,  F01N3/0842 ,  F02B29/0406 ,  F02D9/04 ,  F02D41/0072 ,  F02D41/144 ,  F02D41/18 ,  F02M26/05 ,  F02M26/06 ,  F02M26/10 ,  F02M26/15 ,  F02M26/23 ,  F02M26/38 ,  F02M26/46 ,  F02M26/47 ,  Y02T10/47

摘要： An exhaust-gas recirculation apparatus for an internal combustion engine has a high-pressure EGR passage (20), a low-pressure EGR passage (21), a high-pressure EGR valve (22), and a low-pressure EGR valve (24) and performs open-loop control to the low-pressure EGR valve (24). The flow rate (Ghpl) of EGR gas flowing in the high-pressure EGR passage (20) and the flow rate (Glpl) of EGR gas flowing in the low-pressure EGR gas (21) are estimated based on the oxygen concentration (O2s) in the gas at the portion of the intake passage (3) downstream of the portion to which exhaust gas is delivered from the high-pressure EGR passage (2), the flow rate (Gdpf) of the gas passing through an exhaust-gas purifying catalyst unit (11) provided in the exhaust passage between the exhaust-gas inlets of the high-pressure EGR passage (20) and the low-pressure EGR passage (21), the flow rate (Gafm) of fresh air, and the fuel amount (Q) supplied to the cylinders (2) of the internal combustion engine per unit time.

摘要翻译： 用于内燃机的废气再循环装置具有高压EGR通路（20），低压EGR通路（21），高压EGR阀（22）和低压EGR阀（ 24），对低压EGR阀（24）进行开环控制。 基于氧浓度（O2s）估计在高压EGR通路（20）中流动的EGR气体的流量（Ghpl）和在低压EGR气体（21）中流动的EGR气体的流量（Glpl） ）在从高压EGR通路（2）排出废气部分的下游侧的进气通路（3）的部分的气体中，通过排气的气体的流量（Gdpf） 设置在高压EGR通路（20）和低压EGR通路（21）的排气入口之间的排气通路中的净化催化剂单元（11），新鲜空气的流量（Gafm） 每单位时间供给到内燃机的气缸（2）的燃料量（Q）。

公开(公告)号：US07055508B2

公开(公告)日：2006-06-06

申请号：US10523640

申请日：2003-08-11

申请人： Akio Matsunaga ,  Takao Fukuma

发明人： Akio Matsunaga ,  Takao Fukuma

IPC分类号： F02M25/07 ,  G06F19/00 ,  F02M51/00

CPC分类号： F02D41/0072 ,  F02B3/06 ,  F02B29/0406 ,  F02B2275/14 ,  F02D41/187 ,  F02M26/05 ,  F02M26/23 ,  F02M26/46 ,  Y02T10/123 ,  Y02T10/42 ,  Y02T10/47

摘要： An EGR control device is provided with an EGR control valve (52) and an electronic control unit (60). An exhaust gas recirculation pipe (51) extends across the EGR control valve (52). The electronic control unit calculates a target EGR ratio, a target air flow rate, an actual EGR ratio, and an actual air flow rate, on the basis of operational state quantities of an engine. The electronic control unit then calculates, as a target converted EGR ratio, a ratio of the target EGR ratio to the target air flow rate, calculates, as an actual converted EGR ratio, a ratio of the actual EGR ratio to the actual air flow rate, and controls an opening of the EGR control valve such that the target converted EGR ratio becomes equal to the actual converted EGR ratio. An actual converted EGR ratio is proportional to an intake-air oxygen concentration, and an actual converted EGR ratio and a target converted EGR ratio are calculated independently of a command injection amount. Therefore, a desired intake-air oxygen concentration is obtained irrespective of flow rate characteristics of injection valves.

摘要翻译： EGR控制装置具有EGR控制阀（52）和电子控制单元（60）。 废气再循环管（51）跨过EGR控制阀（52）延伸。 电子控制单元基于发动机的运转状态量来计算目标EGR率，目标空气流量，实际EGR率和实际空气流量。 然后，电子控制单元将目标EGR率与目标空气流量的比率作为目标转换后的EGR率，算出实际的EGR率与实际的空气流量的实际比例 并且控制EGR控制阀的开度，使得目标转换EGR比变得等于实际转换的EGR率。 实际转换的EGR率与进气 - 氧气浓度成正比，独立于指令喷射量计算实际转换后的EGR率和目标转换后的EGR率。 因此，不管喷射阀的流量特性如何，都能获得所需的进气 - 空气氧浓度。

公开(公告)号：US20060048760A1

公开(公告)日：2006-03-09

申请号：US10523640

申请日：2003-08-11

申请人： Akio Matsunaga ,  Takao Fukuma

发明人： Akio Matsunaga ,  Takao Fukuma

IPC分类号： F02M25/07

CPC分类号： F02D41/0072 ,  F02B3/06 ,  F02B29/0406 ,  F02B2275/14 ,  F02D41/187 ,  F02M26/05 ,  F02M26/23 ,  F02M26/46 ,  Y02T10/123 ,  Y02T10/42 ,  Y02T10/47

摘要： An EGR control device is provided with an EGR control valve (52) and an electronic control unit (60). An exhaust gas recirculation pipe (51) extends across the EGR control valve (52). The electronic control unit calculates a target EGR ratio, a target air flow rate, an actual EGR ratio, and an actual air flow rate, on the basis of operational state quantities of an engine. The electronic control unit then calculates, as a target converted EGR ratio, a ratio of the target EGR ratio to the target air flow rate, calculates, as an actual converted EGR ratio, a ratio of the actual EGR ratio to the actual air flow rate, and controls an opening of the EGR control valve such that the target converted EGR ratio becomes equal to the actual converted EGR ratio. An actual converted EGR ratio is proportional to an intake-air oxygen concentration, and an actual converted EGR ratio and a target converted EGR ratio are calculated independently of a command injection amount. Therefore, a desired intake-air oxygen concentration is obtained irrespective of flow rate characteristics of injection valves.

摘要翻译： EGR控制装置具有EGR控制阀（52）和电子控制单元（60）。 废气再循环管（51）跨过EGR控制阀（52）延伸。 电子控制单元基于发动机的运转状态量来计算目标EGR率，目标空气流量，实际EGR率和实际空气流量。 然后，电子控制单元将目标EGR率与目标空气流量的比率作为目标转换后的EGR率，算出实际的EGR率与实际的空气流量的实际比例 并且控制EGR控制阀的开度，使得目标转换EGR比变得等于实际转换的EGR率。 实际转换的EGR率与进气 - 氧气浓度成正比，独立于指令喷射量计算实际转换后的EGR率和目标转换后的EGR率。 因此，不管喷射阀的流量特性如何，都能获得所需的进气 - 空气氧浓度。

公开(公告)号：US06993909B2

公开(公告)日：2006-02-07

申请号：US10695873

申请日：2003-10-30

申请人： Akio Matsunaga ,  Masato Katsuno

发明人： Akio Matsunaga ,  Masato Katsuno

IPC分类号： F02B33/44 ,  F02M25/07

CPC分类号： F02D41/145 ,  F02D41/0072 ,  F02D41/401 ,  F02D2041/0067 ,  F02D2041/007 ,  F02M26/05 ,  F02M26/22 ,  F02M26/28 ,  F02M26/33 ,  Y02T10/47

摘要： An EGR-gas temperature estimation apparatus for an internal combustion engine which has an exhaust circulation pipe and an EGR-gas cooling apparatus. The estimation apparatus obtains the cooling efficiency ηegr of the EGR-gas cooling apparatus from the temperature Tex of EGR gas at the inlet of the exhaust circulation pipe and the flow rate Gegr of the EGR gas, and obtains the temperature THW of engine cooling water, used as a coolant for the EGR-gas cooling apparatus. Subsequently, the estimation apparatus calculates the temperature Tegr of the EGR gas at the outlet of the exhaust circulation pipe by the expression Tegr=Tex−ηegr·(Tex−THW). Since the cooling efficiency ηegr greatly changes depending on the EGR-gas flow rate Gegr and the EGR-gas temperature Tex, the estimation apparatus can accurately estimate the cooling efficiency ηegr, and therefore can accurately estimate the EGR-gas temperature Tegr.

摘要翻译： 一种具有排气循环管和EGR气体冷却装置的内燃机的EGR气体温度推定装置。 估算装置从废气循环管入口处的EGR气体的温度Tex和EGR气体的流量Gegr获得EGR气体冷却装置的冷却效率etaegr，并获得发动机冷却水的温度THW， 用作EGR气体冷却装置的冷却剂。 随后，估计装置通过表达式Tegr = Tex-etaegr。（Tex-THW）计算废气循环管出口处的EGR气体的温度Tegr。 由于冷却效率etaegr根据EGR气体流量Gegr和EGR气体温度Tex而极大地变化，因此估计装置能够准确地估计冷却效率etaegr，因此能够精确地估计EGR气体温度Tegr。

公开(公告)号：US08479494B2

公开(公告)日：2013-07-09

申请号：US12808571

申请日：2009-03-12

申请人： Hiroshi Enomoto ,  Akio Matsunaga

发明人： Hiroshi Enomoto ,  Akio Matsunaga

IPC分类号： F01N11/00

CPC分类号： F02D41/1494 ,  F02D41/1446 ,  F02D41/187 ,  F02D41/222 ,  F02D2200/0414 ,  F02D2200/0418

摘要： In an exhaust gas sensor control system and control method, the exhaust pipe wall temperature is estimated based on the measured exhaust gas temperature measured, the exhaust gas flow rate, and the measured outside air temperature, with reference to a supplied heat quantity calculation map, wall temperature added value map, and a wall temperature subtracted value map. Then the dew-point of the exhaust pipe is calculated based on the air-fuel ratio of the air flow amount to the weight of fuel, and a condensed water added amount is calculated based on the relative wall temperature and the exhaust gas flow amount. The amount of condensed water is then estimated by summing the calculated condensed water added amounts.

摘要翻译： 在废气传感器控制系统和控制方法中，参照供给的热量计算图，基于测量的排气温度，废气流量和测量的外部空气温度来估计排气管壁温度， 壁温附加值图，壁温度相减值图。 然后，基于空气流量与燃料重量的空燃比计算出排气管的露点，并且基于相对壁温度和废气流量计算冷凝水添加量。 然后通过将计算的冷凝水添加量相加来估计冷凝水的量。

公开(公告)号：US08453446B2

公开(公告)日：2013-06-04

申请号：US12522749

申请日：2008-01-23

申请人： Tomomi Onishi ,  Akio Matsunaga ,  Shigeki Nakayama

发明人： Tomomi Onishi ,  Akio Matsunaga ,  Shigeki Nakayama

IPC分类号： F02B33/44 ,  F02B77/08 ,  F02B47/08 ,  F02M25/07 ,  F02D17/04

CPC分类号： F02D41/0007 ,  F02B29/0406 ,  F02D9/04 ,  F02D41/0065 ,  F02D41/123 ,  F02D2041/0017 ,  F02M25/06 ,  F02M26/05 ,  F02M26/06 ,  F02M26/10 ,  F02M26/15 ,  F02M26/23 ,  Y02T10/144 ,  Y02T10/47

摘要： An exhaust gas control system for an internal combustion engine includes a turbocharger that includes a compressor arranged in an intake passage, and a turbine arranged in an exhaust passage; a low-pressure EGR unit that recirculates a portion of exhaust gas back to the internal combustion engine through a low-pressure EGR passage that provides communication between the exhaust passage, at a portion downstream of the turbine, and the intake passage, at a portion upstream of the compressor; a low-pressure EGR valve that is provided in the low-pressure EGR passage, and that changes the flow passage area of the low-pressure EGR passage; and a valve control unit that executes an opening/closing control over the low-pressure EGR valve. When it is determined that the internal combustion engine is under a predetermined low-temperature environment, the low-pressure EGR valve is kept closed while the internal combustion engine is in the fuel-supply cutoff operation mode.

摘要翻译： 一种用于内燃机的排气控制系统包括：涡轮增压器，包括布置在进气通道中的压缩机和布置在排气通道中的涡轮机; 低压EGR单元，其通过低压EGR通道将排气的一部分再循环回内燃机，所述低压EGR通道在涡轮机下游的部分和进气通道之间提供排气通道与进气通道之间的连通 压缩机上游; 低压EGR阀，其设置在低压EGR通路中，并且改变低压EGR通路的流路面积; 以及阀控制单元，其执行低压EGR阀的打开/关闭控制。 当确定内燃机处于预定的低温环境下时，在内燃机处于燃料供给切断操作模式的同时，低压EGR阀保持关闭。