公开(公告)号：US08122869B2

公开(公告)日：2012-02-28

申请号：US12443782

申请日：2007-08-13

申请人： Takahiko Fujiwara ,  Norihisa Nakagawa ,  Taiga Hagimoto ,  Junichi Kako ,  Naoto Kato ,  Shuntaro Okazaki ,  Koji Ide

发明人： Takahiko Fujiwara ,  Norihisa Nakagawa ,  Taiga Hagimoto ,  Junichi Kako ,  Naoto Kato ,  Shuntaro Okazaki ,  Koji Ide

IPC分类号： F02M1/00

CPC分类号： F02D41/2454 ,  F02D13/023 ,  F02D41/1454 ,  F02D41/2438 ,  F02D41/2474 ,  Y02T10/18

摘要： An air-fuel ratio control system of a multi-cylinder internal combustion engine provided with a throttle valve and opening characteristic control means, which system performs feedback control of an air-fuel ratio based on an output of a sensor detecting an air-fuel ratio of exhaust gas and is capable of performing more accurate air-fuel ratio control, is provided. In the feedback control, the relationship of the output of the sensor and a feedback value is corrected based on a feedback learning correction value learned and determined based on the output of the sensor during the feedback control, and, when newly learning the feedback learning correction value, the intake air amount is controlled by only the throttle valve.

摘要翻译： 具有节气门和开启特性控制装置的多缸内燃机的空燃比控制系统，其基于检测空燃比的传感器的输出进行空燃比的反馈控制 的排气，能够进行更精确的空燃比控制。 在反馈控制中，基于在反馈控制期间基于传感器的输出而学习和确定的反馈学习校正值来校正传感器的输出与反馈值的关系，并且当新学习反馈学习校正时 值，进气量仅由节流阀控制。

公开(公告)号：US20120022770A1

公开(公告)日：2012-01-26

申请号：US13146828

申请日：2009-03-24

申请人： Shinichi Soejima ,  Naoto Kato ,  Kaoru Otsuka ,  Kiyonori Takahashi ,  Hiroyuki Tanaka ,  Ryutaro Moriguchi

发明人： Shinichi Soejima ,  Naoto Kato ,  Kaoru Otsuka ,  Kiyonori Takahashi ,  Hiroyuki Tanaka ,  Ryutaro Moriguchi

IPC分类号： F02D41/30

CPC分类号： F02D41/126 ,  F02D11/10 ,  F02D41/0002 ,  F02D2250/21 ,  Y02T10/42

摘要： A control device for an internal combustion engine is provided. The control device includes means which controls fuel injection by a fuel injection device, and means which controls the throttle. The fuel injection control means sequentially restarts fuel injection for each cylinder in accordance with an ignition sequence among cylinders when cancellation conditions of fuel cut are satisfied during implementation of the fuel cut. Meanwhile, the throttle control means firstly controls the throttle to a closing side when the cancellation conditions of fuel cut are satisfied. The throttle is controlled to the closing side, whereby the air amount in the intake pipe is decreased, and the air amount in a cylinder which is the basis of calculation of a fuel injection amount is also decreased.

摘要翻译： 提供一种用于内燃机的控制装置。 控制装置包括控制燃料喷射装置的燃料喷射的装置和控制节气门的装置。 燃料喷射控制装置在燃料切断的实施期间满足燃料切断的取消条件时，根据气缸之间的点火顺序依次重新开始每个气缸的燃料喷射。 同时，当满足燃料切断的取消条件时，节气门控制装置首先将节气门控制到关闭侧。 节气门被控制到关闭侧，由此进气管中的空气量减少，作为燃料喷射量的计算的基础的气缸中的空气量也减小。

公开(公告)号：US20110100344A1

公开(公告)日：2011-05-05

申请号：US12999006

申请日：2009-06-18

申请人： Akihiro Katayama ,  Naoto Kato ,  Shuntaro Okazaki ,  Kenji Kimura ,  Masashi Hakariya ,  Hiroaki Tsuji

发明人： Akihiro Katayama ,  Naoto Kato ,  Shuntaro Okazaki ,  Kenji Kimura ,  Masashi Hakariya ,  Hiroaki Tsuji

IPC分类号： F02D41/00

CPC分类号： F02D41/1498 ,  F02D35/021 ,  F02D35/023 ,  F02D41/1401 ,  F02D41/1441 ,  F02D41/2454 ,  F02D2041/1418 ,  F02D2200/1015 ,  G01M15/11

摘要： An engine ECU calculates a rotational variation based on a required rotation time when a complete misfire occurs in a cylinder, a required rotation time when complete combustion occurs in the cylinder, and a required rotation time during the current combustion stroke, and integrates the calculated rotational variation. If it is determined that the number of times the rotational variation has been integrated has reached a predetermined number, the engine ECU calculates an amount of learning value deviation from the integrated rotational variation. If the amount of learning value deviation is equal to or greater than a certain amount, the engine ECU corrects a learning value of a sub-feedback control with respect to the air-fuel ratio.

摘要翻译： 发动机ECU基于在气缸中发生完全失火所需的旋转时间，在气缸中发生完全燃烧时所需的旋转时间以及当前燃烧行程期间所需的旋转时间，计算旋转变化，并且将计算出的旋转 变异。 如果确定旋转变化已经被积分的次数达到预定数量，则发动机ECU计算学习值偏离积分旋转变化量的量。 如果学习值偏差量等于或大于一定量，则发动机ECU相对于空燃比校正副反馈控制的学习值。

公开(公告)号：US20100163008A1

公开(公告)日：2010-07-01

申请号：US12601019

申请日：2008-06-10

申请人： Naoto Kato

发明人： Naoto Kato

IPC分类号： F02D41/00 ,  F01N3/10 ,  G01M15/10

CPC分类号： F02D41/1495 ,  F02D41/1454 ,  F02D41/1458 ,  F02D41/187 ,  F02D41/222 ,  F02D2200/0614 ,  Y02T10/40

摘要： An abnormality detection device for an internal combustion engine capable of performing abnormality detection with accuracy, and an air/fuel ratio control apparatus for an internal combustion engine capable of performing air/fuel ratio control with accuracy. An estimated value of the amount of intake air at a valve closing time at which an intake value is closed, is computed. The in-cylinder air/fuel ratio in a cylinder is computed by using the estimated value. The obtained in-cylinder air/fuel ratio is used as an input air/fuel ratio to identify a parameter in a primary delay element. Determination as to the existence/nonexistence of an abnormality in a pre-catalyst sensor (A/F sensor) is made on the basis of the obtained parameter.

摘要翻译： 能够精确地进行异常检测的内燃机的异常检测装置和能够精确地进行空燃比控制的内燃机的空燃比控制装置。 计算进气门关闭时关闭时的进气量的推定值。 通过使用估计值来计算气缸中的缸内空气/燃料比。 将获得的缸内空气/燃料比用作输入空燃比，以识别主延迟元件中的参数。 基于获得的参数，进行关于催化剂前传感器（A / F传感器）中的异常的存在/不存在的判定。

公开(公告)号：US07677223B2

公开(公告)日：2010-03-16

申请号：US11991951

申请日：2006-11-13

申请人： Shuntaro Okazaki ,  Naoto Kato

发明人： Shuntaro Okazaki ,  Naoto Kato

IPC分类号： F02M1/00 ,  B60T7/12

CPC分类号： F02D41/1456 ,  F01N3/101 ,  F01N13/009 ,  F01N13/0093 ,  F01N2560/025 ,  F02D41/1441 ,  F02D41/1483 ,  F02D41/1487 ,  F02D2041/1409 ,  Y02A50/2324 ,  Y02T10/22

摘要： The air-fuel-ratio control apparatus for an internal combustion engine obtains a composite air-fuel ratio abyfs from a downstream-side correction value Vafsfb(k) based upon an output value Voxs from a downstream air-fuel-ratio sensor 67 and an output value Vabyfs from an upstream air-fuel-ratio sensor 66, and obtains an upstream-side feedback correction value DFi on the basis of the composite air-fuel ratio abyfs. A fuel injection quantity Fi is determined to a value obtained by adding the upstream-side correction value DFi to a control-use base fuel injection quantity Fbasec (=base fuel injection quantity Fbase·coefficient Ksub). The coefficient Ksub is determined on the basis of the downstream-side feedback correction value Vafsfb(k) in such a manner that the control-use base fuel injection quantity Fbasec (accordingly, the fuel injection quantity Fi) is determined such that the output value Vabyfs from the upstream air-fuel-ratio sensor 66 changes in the direction of canceling the change in the downstream-side feedback correction value Vafsfb(k).

摘要翻译： 用于内燃机的空燃比控制装置根据来自下游空燃比传感器67的输出值Voxs和下游侧空燃比传感器67的输出值Voxs，从下游侧校正值Vafsfb（k）获得复合空燃比abyfs 从上游空燃比传感器66输出的输出值Vabyfs，基于复合空燃比abyfs求出上游侧反馈修正值DFi。 燃料喷射量Fi被确定为通过将上游侧校正值DFi加到控制用基础燃料喷射量Fbasec（=基础燃料喷射量Fbase·系数Ksub）而获得的值。 基于下游侧反馈校正值Vafsfb（k）来确定系数Ksub，使得控制用基础燃料喷射量Fbasec（相应地，燃料喷射量Fi）被确定为使得输出值 来自上游空燃比传感器66的Vabyfs在抵消下游侧反馈校正值Vafsfb（k）的变化的方向上变化。

公开(公告)号：USD573160S1

公开(公告)日：2008-07-15

申请号：US29292684

申请日：2007-10-23

申请人： Naoto Kato

设计人： Naoto Kato

公开(公告)号：USD570381S1

公开(公告)日：2008-06-03

申请号：US29292700

申请日：2007-10-23

申请人： Naoto Kato

设计人： Naoto Kato

公开(公告)号：US07278394B2

公开(公告)日：2007-10-09

申请号：US11637116

申请日：2006-12-12

申请人： Shuntaro Okazaki ,  Naoto Kato

发明人： Shuntaro Okazaki ,  Naoto Kato

IPC分类号： F02D41/14 ,  G06F17/00

CPC分类号： F02D41/1439 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/2454 ,  F02D2041/1432

摘要： The air-fuel-ratio control apparatus for an internal combustion engine obtains an upstream-side feedback correction value DFi for feedback-controlling an air-fuel ratio on the basis of a value (Fcrlow(k−N)) that is obtained by performing a low-pass filter process with a time constant τ to a value corresponding to an upstream-side target air-fuel ratio abyfr at the time point a dead time, which corresponds to the period from a time when the instruction for injecting fuel to the time when exhaust gas generated based up on a combustion of the fuel reaches an upstream air-fuel-ratio sensor 66, before the present point in time, and a value (Fc(k−N)) corresponding to an output value Vabyfs from the upstream air-fuel-ratio sensor 66 at the present time. The time constant τ of the low-pass filter process is set to a value equal to the time constant of the response delay of the upstream air-fuel-ratio sensor 66.

公开(公告)号：US20070169465A1

公开(公告)日：2007-07-26

申请号：US11647243

申请日：2006-12-29

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： F01N3/00 ,  F02D41/14

CPC分类号： F02D41/123 ,  F01N2430/06 ,  F01N2560/02 ,  F02D41/1475 ,  Y02T10/22

摘要： The output from an air-fuel ratio sensor is corrected using an integral term that is calculated by integrating values of deviation of the output from an oxygen sensor with respect to a reference output that would be obtained when the combustion air-fuel ratio is stoichiometric, when an engine operates with a target combustion air-fuel ratio set to the stoichiometric air-fuel ratio. A fuel-cutoff prohibition period in which fuel supply cutoff is prohibited is set so that the engine continues to operate with the target combustion air-fuel ratio set to the stoichiometric air-fuel ratio, until the integral term is updated at least once. The integral term may be updated when a predetermined updating condition is satisfied.

摘要翻译： 使用通过将氧传感器的输出的偏差的值相对于在燃烧空燃比为化学计量时获得的基准输出而计算的积分项来校正来自空燃比传感器的输出， 当发动机以设定为理论空燃比的目标燃烧空燃比运行时。 设定禁止燃料供给切断的燃料切断禁止期间，使得发动机以设定为理论空燃比的目标燃耗空燃比继续运转，直到积分项更新至少一次。 当满足预定的更新条件时，可以更新积分项。

公开(公告)号：US07198952B2

公开(公告)日：2007-04-03

申请号：US10193900

申请日：2002-07-15

申请人： Takahiro Uchida ,  Hiroshi Sawada ,  Toshinari Nagai ,  Akihiro Katayama ,  Yasuhiro Kuze ,  Naoto Kato

发明人： Takahiro Uchida ,  Hiroshi Sawada ,  Toshinari Nagai ,  Akihiro Katayama ,  Yasuhiro Kuze ,  Naoto Kato

IPC分类号： G01N31/10 ,  G01N33/22 ,  F01N3/18 ,  F01N3/20 ,  F01N3/22

CPC分类号： F01N11/007 ,  B01D53/9495 ,  F01N2550/02 ,  F02D41/0295 ,  F02D41/1408 ,  F02D41/22 ,  F02D2200/0814 ,  F02D2200/0816 ,  Y02T10/40 ,  Y02T10/47 ,  Y10T436/20 ,  Y10T436/208339 ,  Y10T436/25875

摘要： An upstream side catalyst and a downstream side catalyst are disposed in an exhaust passage. A first oxygen sensor is disposed between these two catalysts and a second oxygen sensor is disposed downstream of the downstream side catalyst. The air-fuel ratio is forcibly oscillated and the oxygen storage capacity of the upstream side catalyst is detected. Deterioration of the upstream side catalyst is then detected based on whether this oxygen storage capacity is larger than a predetermined value. The forced oscillation of the air-fuel ratio is performed only when the oxygen storage state of the downstream side catalyst is appropriate.

摘要翻译： 上游侧催化剂和下游侧催化剂设置在排气通道中。 第一氧传感器设置在这两个催化剂之间，第二氧传感器设置在下游侧催化剂的下游。 空燃比被强制振荡，并检测上游侧催化剂的储氧能力。 然后基于该储氧容量是否大于预定值来检测上游侧催化剂的劣化。 仅当下游侧催化剂的储氧状态适当时才进行空燃比的强制振荡。