公开(公告)号：US20140305103A1

公开(公告)日：2014-10-16

申请号：US14358137

申请日：2011-11-17

申请人： Norihisa Nakagawa ,  Syuntaro Okazaki ,  Yuji Yamaguchi

发明人： Norihisa Nakagawa ,  Syuntaro Okazaki ,  Yuji Yamaguchi

IPC分类号： F01N3/10

CPC分类号： F01N3/101 ,  F01N11/007 ,  F01N2430/06 ,  F01N2560/025 ,  F01N2900/0402 ,  F01N2900/0408 ,  F01N2900/0416 ,  F01N2900/1402 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/2461 ,  Y02T10/22 ,  Y02T10/47

摘要： A control apparatus for an internal combustion engine configured to control the internal combustion engine is provided with: a first F/B controlling device configured to perform first F/B control in which an air-fuel ratio of a gas flowing into a three way catalyst converges to a target air-fuel ratio, on the basis of an output value of an air-fuel ratio sensor; a second F/B controlling device configured to perform second F/B control in which the target air-fuel ratio or the output value of the air-fuel ratio sensor is corrected such that an output voltage value of an oxygen concentration sensor matches a target output value; a learning device configured to learn an output characteristic of the oxygen concentration sensor; and a target value setting device configured to set the target output value according to a learning value of the output characteristic.

摘要翻译： 配置成控制内燃机的内燃机的控制装置设置有：第一F / B控制装置，被配置为执行第一F / B控制，其中流入三元催化剂的气体的空燃比 基于空燃比传感器的输出值收敛到目标空燃比; 第二F / B控制装置，被配置为执行第二F / B控制，其中校正所述目标空燃比或所述空燃比传感器的输出值，使得氧浓度传感器的输出电压值与目标 产值; 被配置为学习氧浓度传感器的输出特性的学习装置; 以及目标值设定装置，被配置为根据所述输出特性的学习值来设定所述目标输出值。

公开(公告)号：US08843259B2

公开(公告)日：2014-09-23

申请号：US13695655

申请日：2010-07-26

申请人： Norihisa Nakagawa ,  Takashi Nishikiori

发明人： Norihisa Nakagawa ,  Takashi Nishikiori

IPC分类号： B60W20/00 ,  B60K6/445 ,  B60W10/06 ,  B60W10/08

CPC分类号： B60W20/15 ,  B60K6/445 ,  B60W10/06 ,  B60W10/08 ,  B60W20/00 ,  B60W20/16 ,  B60W2510/0604 ,  B60W2510/068 ,  B60W2530/12 ,  B60Y2300/46 ,  B60Y2300/525 ,  B60Y2300/64 ,  Y02T10/54 ,  Y02T10/6239 ,  Y02T10/6286 ,  Y10S903/903

摘要： An engine includes variable valve mechanisms capable of causing an intake valve and an exhaust valve to stop. An ECU estimates poisoning states of catalysts, and executes and prohibits stopping of the valves based on the poisoning states. When stopping of the valves is prohibited during a fuel-cut operation, the ECU drives a crankshaft of the engine by means of a motor to idle the engine. Thus, even in a hybrid vehicle in which the engine is stopped during a fuel-cut operation, a sufficient amount of oxygen can be rapidly supplied to the catalysts by utilizing a pumping action of pistons, and the catalysts can be caused to recover from rich poisoning efficiently.

摘要翻译： 发动机包括能够使进气阀和排气阀停止的可变阀机构。 ECU估计催化剂的中毒状态，并根据中毒状态执行并禁止阀停止。 在燃油切断操作期间禁止阀停止时，ECU通过电动机驱动发动机的曲轴以使发动机怠速。 因此，即使在燃料切断作业中发动机停止的混合动力车辆中，也可以通过利用活塞的泵送作用将足够量的氧气迅速地供给到催化剂中，并且可以使催化剂从富 有效中毒

公开(公告)号：US20100217506A1

公开(公告)日：2010-08-26

申请号：US12682919

申请日：2009-01-27

申请人： Hiroaki Mizoguchi ,  Norihisa Nakagawa

发明人： Hiroaki Mizoguchi ,  Norihisa Nakagawa

IPC分类号： F02D41/30 ,  F01N3/10 ,  F01N11/00

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。

公开(公告)号：US07712459B2

公开(公告)日：2010-05-11

申请号：US12225930

申请日：2007-04-23

申请人： Ryo Ishii ,  Norihisa Nakagawa

发明人： Ryo Ishii ,  Norihisa Nakagawa

IPC分类号： F02D41/00

CPC分类号： F02D41/064 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/1482 ,  F02D2041/1409 ,  F02D2041/1422

摘要： An air-fuel ratio control system includes an air-fuel ratio sensor (23, 24) disposed upstream or downstream of an exhaust purification catalyst, and performs feedback control of the fuel supply amount such that an output value of the air-fuel ratio sensor is controlled to the target air-fuel ratio. The feedback control is performed by calculating a correction amount by summing up the value of a proportional and the value of an integral calculated based on the deviation between the output value of the air-fuel ratio sensor and the target air-fuel ratio, and correcting the fuel supply amount based on the obtained correction amount. At cold startup of the internal combustion engine, the value of the integral is set to be a smaller value from the startup of the internal combustion engine until a predetermined period elapses.

摘要翻译： 空燃比控制系统包括设置在排气净化催化剂的上游或下游的空燃比传感器（23,24），并且执行燃料供给量的反馈控制，使得空燃比传感器 被控制到目标空燃比。 反馈控制是通过将比例值和基于空燃比传感器的输出值与目标空燃比之间的偏差计算出的积分值相加的值来计算校正量，并且校正 基于获得的校正量的燃料供给量。 在内燃机的冷启动时，积分值被设定为从内燃机启动直到经过预定时间后的较小值。

公开(公告)号：US20090314268A1

公开(公告)日：2009-12-24

申请号：US12448346

申请日：2008-04-08

申请人： Takahiko Fujiwara ,  Hiroaki Mizoguchi ,  Norihisa Nakagawa ,  Taiga Hagimoto ,  Naoto Kato ,  Shuntaro Okazaki

发明人： Takahiko Fujiwara ,  Hiroaki Mizoguchi ,  Norihisa Nakagawa ,  Taiga Hagimoto ,  Naoto Kato ,  Shuntaro Okazaki

IPC分类号： F02D41/00

CPC分类号： F02D41/148 ,  F02D41/0295 ,  F02D41/126 ,  F02D41/1441

摘要： The present invention relates to an air-fuel ratio control device for an internal combustion engine, and makes it possible to maintain high purification performance by suppressing a decrease in the oxygen occlusion capability of a catalyst. When an O2 sensor output oxs is greater than a reference value oxsref, which corresponds to a stoichiometric air-fuel ratio, and smaller than an upper threshold value oxsrefR, a sub-FB reflection coefficient is fixed at a predetermined value vdox2 for providing a lean air-fuel ratio. When, on the other hand, the O2 sensor output oxs is smaller than the reference value oxsref and greater than a lower threshold value oxsrefL, the sub-FB reflection coefficient is fixed at a predetermined value vdox2 for providing a rich air-fuel ratio. The sub-FB reflection coefficient reflects the O2 sensor output oxs in the calculation of a fuel injection amount and increases or decreases to have a consequence on the air-fuel ratio of an exhaust gas.

摘要翻译： 本发明涉及一种用于内燃机的空燃比控制装置，并且通过抑制催化剂的吸氧能力的降低，可以保持高的净化性能。 当O2传感器输出ox大于对应于化学计量空燃比且小于上限阈值oxsrefR的参考值oxsref时，子FB反射系数固定在预定值vdox2以提供稀薄 空燃比。 另一方面，当O2传感器输出ox小于参考值oxsref并且大于下阈值oxsrefL时，子FB反射系数固定在预定值vdox2以提供浓空燃比。 在计算燃料喷射量时，子FB反射系数反映了O2传感器输出牛，并且增加或减少以对排气的空燃比产生影响。

公开(公告)号：US20090173323A1

公开(公告)日：2009-07-09

申请号：US12225930

申请日：2007-04-23

申请人： Ryo Ishii ,  Norihisa Nakagawa

发明人： Ryo Ishii ,  Norihisa Nakagawa

IPC分类号： F02D41/00

CPC分类号： F02D41/064 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/1482 ,  F02D2041/1409 ,  F02D2041/1422

摘要： An air-fuel ratio control system includes an air-fuel ratio sensor (23, 24) disposed upstream or downstream of an exhaust purification catalyst, and performs feedback control of the fuel supply amount such that an output value of the air-fuel ratio sensor is controlled to the target air-fuel ratio. The feedback control is performed by calculating a correction amount by summing up the value of a proportional and the value of an integral calculated based on the deviation between the output value of the air-fuel ratio sensor and the target air-fuel ratio, and correcting the fuel supply amount based on the obtained correction amount. At cold startup of the internal combustion engine, the value of the integral is set to be a smaller value from the startup of the internal combustion engine until a predetermined period elapses.

摘要翻译： 空燃比控制系统包括设置在排气净化催化剂的上游或下游的空燃比传感器（23,24），并且执行燃料供给量的反馈控制，使得空燃比传感器 被控制到目标空燃比。 反馈控制是通过将比例值和基于空燃比传感器的输出值与目标空燃比之间的偏差计算出的积分值相加的值来计算校正量，并且校正 基于获得的校正量的燃料供给量。 在内燃机的冷启动时，积分值被设定为从内燃机启动直到经过预定时间后的较小值。

公开(公告)号：US20080147297A1

公开(公告)日：2008-06-19

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

IPC分类号： F02D41/00 ,  F02D41/06 ,  F02D45/00 ,  F01N3/18

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，配置有O 2传感器 在所述排气净化催化剂的下游侧，基于来自所述进气量检测单元的输出信息，对所述排气净化催化剂的排气进行目标空燃比的反馈控制的目标空燃比控制单元， O 2传感器，以及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执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单元对所述目标空燃比进行反馈控制，使得即使在所述进气量变化时，每单位时间的氧气存储量的修正量 使排气净化催化剂的量保持恒定。

公开(公告)号：US07204080B2

公开(公告)日：2007-04-17

申请号：US11359461

申请日：2006-02-23

申请人： Norihisa Nakagawa

发明人： Norihisa Nakagawa

IPC分类号： F01N3/00

CPC分类号： F02D41/1482 ,  F01N11/007 ,  F01N2560/02 ,  F01N2900/0422 ,  F02D41/2448 ,  F02D41/2454 ,  F02D2041/1409 ,  Y02T10/47

摘要： A first integration value is obtained by performing time integration on a feedback control signal during the time interval between the instant at which the deviation between a reference signal and the output signal of an oxygen sensor reverses from a negative value to a positive value and the instant at which the deviation reverses back to the negative value. A second integration value is obtained by performing time integration on a feedback control signal during the time interval between the instant at which the deviation between a reference signal and the output signal of the oxygen sensor reverses from a positive value to a negative value and the instant at which the deviation reverses back to the positive value. When the deviation between the absolute values of the first and second integration values is smaller than a predetermined threshold value, it is concluded that a feedback learning value is completely learned.

摘要翻译： 通过在参考信号和氧传感器的输出信号之间的偏差与负值反转到正值之间的时间间隔内的时间间隔内对反馈控制信号执行时间积分获得第一积分值， 其中偏差反转回负值。 通过在参考信号和氧传感器的输出信号之间的偏差与正值反转到负值之间的时间间隔内的时间间隔内对反馈控制信号执行时间积分获得第二积分值， 其中偏差反转回正值。 当第一和第二积分值的绝对值之间的偏差小于预定阈值时，得出结论，反馈学习值被完全学习。

公开(公告)号：US20050022510A1

公开(公告)日：2005-02-03

申请号：US10881177

申请日：2004-07-01

申请人： Norihisa Nakagawa ,  Takahiko Fujiwara

发明人： Norihisa Nakagawa ,  Takahiko Fujiwara

IPC分类号： F02D45/00 ,  F01N3/28 ,  F01N13/02 ,  F02D41/14 ,  F01N3/00

CPC分类号： F01N3/101 ,  F01N3/28 ,  F01N13/009 ,  F01N13/0093 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/14 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/2461 ,  Y02T10/22

摘要： A catalyst is positioned in an exhaust path of an internal-combustion engine. A main air-fuel ratio sensor and sub-oxygen sensor are respectively positioned upstream and downstream of the catalyst. A main feedback operation is performed so that the output of the main air-fuel ratio sensor is fed back and reflected in the fuel injection quantity until the control A/F prevailing upstream of the catalyst coincides with the target A/F. A sub-feedback operation is performed so that the output of the sub-oxygen sensor is fed back and reflected in the fuel injection quantity until the air-fuel ratio of an exhaust gas flowing out of the catalyst agrees with a theoretical air-fuel ratio. Since a catalyst window varies in accordance with the intake air quantity, the fuel injection quantity is corrected so that the larger the intake air quantity becomes, the richer the control A/F is.

摘要翻译： 催化剂位于内燃机的排气路径中。 主要的空燃比传感器和次氧传感器分别位于催化剂的上游和下游。 执行主反馈操作，使得主空燃比传感器的输出被反馈并反映在燃料喷射量中，直到催化剂上游的控制A / F与目标A / F一致。 执行副反馈操作，使得副氧传感器的输出被反馈并反映在燃料喷射量中，直到从催化剂流出的排气的空燃比与理论空燃比一致 。 由于催化剂窗口根据进气量而变化，因此校正燃料喷射量，使得进气量越大，控制装置A / F越浓。

公开(公告)号：US06318343B1

公开(公告)日：2001-11-20

申请号：US09442388

申请日：1999-11-18

申请人： Norihisa Nakagawa ,  Takayuki Demura

发明人： Norihisa Nakagawa ,  Takayuki Demura

IPC分类号： F02M3704

CPC分类号： F02D41/3845 ,  F02D2041/001 ,  F02M63/0225

摘要： The fuel pump control system includes an electronic control unit (ECU) for controlling the discharge capacity of a plunger type high pressure fuel pump driven by a driving cam connected to the camshaft of an engine. The engine is provided with a variable valve timing device for controlling valve timing of the engine by adjusting the rotation phase of the camshaft relative to the crankshaft. The pump is provided with a suction valve. When the open/close timing of the suction valve changes, the effective discharge stroke of the pump and, thereby the discharge capacity of the pump changes. The ECU estimates the change in the valve timing of the engine during the effective discharge stroke of the pump before the effective discharge stroke starts, and adjusts the open/close timing of the suction valve in accordance with the estimated change in the valve timing so that the discharge capacity of the pump becomes a target discharge capacity regardless of the change in the valve timing of the engine.

摘要翻译： 燃料泵控制系统包括用于控制由连接到发动机的凸轮轴的驱动凸轮驱动的柱塞式高压燃料泵的排出能力的电子控制单元（ECU）。 发动机设置有可变气门正时装置，用于通过调节凸轮轴相对于曲轴的旋转相位来控制发动机的气门正时。 泵设有吸气阀。 当吸气阀的打开/关闭正时变化时，泵的有效排出行程和泵的排放能力发生变化。 ECU估计在有效排放行程开始之前在泵的有效排出冲程期间发动机的气门正时的变化，并且根据估计的气门正时的变化来调节吸气阀的打开/关闭正时，使得 无论发动机的气门正时变化如何，泵的排出容量成为目标的排出量。