公开(公告)号：US5179929A

公开(公告)日：1993-01-19

申请号：US796415

申请日：1991-11-22

申请人： Yukio Miyashita ,  Hiroshi Ohno ,  Kunio Noguchi ,  Hironao Fukuchi

发明人： Yukio Miyashita ,  Hiroshi Ohno ,  Kunio Noguchi ,  Hironao Fukuchi

IPC分类号： F02D41/14 ,  F02D45/00

CPC分类号： F02D41/1495 ,  F02D41/2441 ,  F02D41/2454 ,  F02D41/248 ,  F02B2275/18 ,  F02D41/1456 ,  F02D41/2448

摘要： A method of detecting deterioration of an exhaust gas ingredient concentration sensor for use in controlling an air-fuel ratio of a mixture supplied to an internal combustion engine having an exhaust system in which the sensor is arranged. The sensor has an output characteristic approximately proportional to concentration of a specific ingredient in exhaust gases emitted from the engine. The air-fuel ratio is feedback-controlled to a desired air-fuel ratio by calculating an amount of fuel supplied to the engine by the use of a desired air-fuel ratio coefficient indicative of the desired air-fuel ratio and set in dependence on operating conditions of the engine, and an air-fuel ratio correction coefficient set in dependence on a value of an output from the sensor and the desired air-fuel ratio coefficient. A plurality of average values of the air-fuel ratio correction coefficient are calculated, respectively, when the desired air-fuel ratio falls within a plurality of predetermined ranges. The average values thus calculated are compared with each other. A degree of deterioration of the sensor is determined from results of the comparison. Further, a method of feedback-controlling the air-fuel ratio in the above-mentioned manner, in which the value of the output from the sensor is corrected in response to the degree of deterioration thus determined.

摘要翻译： 一种检测废气成分浓度传感器的劣化的方法，所述废气成分浓度传感器用于控制供给具有布置有所述传感器的排气系统的内燃机的混合物的空燃比。 传感器的输出特性与发动机排放的废气中特定成分的浓度大致成正比。 通过使用表示所需空燃比的期望的空燃比计算燃料供应量来计算空燃比，从而将空燃比反馈控制到所需的空燃比，依照 发动机的工作条件以及根据传感器的输出值和期望的空燃比系数设定的空燃比校正系数。 当期望的空燃比落在多个预定范围内时，分别计算空燃比校正系数的多个平均值。 将这样计算的平均值相互比较。 根据比较结果确定传感器的劣化程度。 此外，以上述方式反馈控制空燃比的方法，其中响应于如此确定的劣化程度校正来自传感器的输出值。

公开(公告)号：US5209213A

公开(公告)日：1993-05-11

申请号：US757424

申请日：1991-09-10

申请人： Yukio Miyashita ,  Kunio Noguchi ,  Hironao Fukuchi

发明人： Yukio Miyashita ,  Kunio Noguchi ,  Hironao Fukuchi

IPC分类号： B60K31/00 ,  F02D41/02 ,  F02D41/14 ,  F02D45/00

CPC分类号： F02D41/1475 ,  B60K31/00 ,  F02D41/0225 ,  F02B2275/18 ,  F02D2200/501 ,  F02D41/1456 ,  Y10T477/68

摘要： A method of feedback-controlling the air-fuel ratio of a mixture supplied to an internal combustion engine to a desired air-fuel ratio which is set to a value leaner than a stoichiometric air-fuel ratio, by the use of output from an exhaust gas ingredient concentration sensor, depending upon operating conditions of the engine, the desired air-fuel ratio being set to a leaner value as the transmission of the engine is set to a smaller reduction ratio. A reduction ratio to which the transmission has been set is detected. The travelling speed of a vehicle on which the engine is installed is detected. The desired air-fuel ratio is set to a richer value as the travelling speed of the vehicle is lower, insofar as the transmission is set to the same reduction ratio.

摘要翻译： 通过使用来自排气的输出，将供给内燃机的混合物的空燃比反馈控制为设定为比化学计量空燃比更稀薄的值的期望空燃比的方法 气体成分浓度传感器，根据发动机的运行条件，将发动机的变速器的期望空燃比设定为更小的减速比。 检测到设定了变速器的减速比。 检测发动机的车辆行驶速度。 只要将变速器设定为相同的减速比，所需的空燃比被设定为更加丰富的车辆的行驶速度。

公开(公告)号：US5241943A

公开(公告)日：1993-09-07

申请号：US935316

申请日：1992-08-26

申请人： Yukio Miyashita ,  Hironao Fukuchi ,  Kunio Noguchi

发明人： Yukio Miyashita ,  Hironao Fukuchi ,  Kunio Noguchi

IPC分类号： F02D13/02 ,  F02D41/00 ,  F02D41/14 ,  F02M25/07

CPC分类号： F02D41/0065 ,  F02D13/0207 ,  F02D41/2441 ,  F02D41/2448 ,  F02D41/2454 ,  F02M26/48 ,  F02M26/57 ,  F02B2275/18 ,  F02D2041/001 ,  F02D41/1456 ,  F02M2026/009 ,  Y02T10/18 ,  Y02T10/47

摘要： According to an air-fuel ratio control method, an amount of fuel supplied to an internal combustion engine is calculated by the use of an air-fuel ratio correction coefficient set according to an output from an exhaust gas ingredient concentration sensor. An average value of the air-fuel ratio correction coefficient is calculated. When a difference between an actual value of opening of an exhaust gas recirculation control valve and a desired value of same set in response to operating conditions of the engine is larger than a predetermined value, the calculation of the average value of the air-fuel ratio correction coefficient is inhibited, or alternatively, an averaging rate in the calculation of the average value is decreased.

摘要翻译： 根据空燃比控制方法，通过使用根据排气成分浓度传感器的输出设定的空燃比校正系数来计算供给到内燃机的燃料量。 计算空燃比校正系数的平均值。 当废气再循环控制阀的实际打开值与响应于发动机的运行条件设定的相同值的差大于预定值时，空燃比的平均值的计算 校正系数被抑制，或者平均值的计算中的平均速率降低。

公开(公告)号：US5295416A

公开(公告)日：1994-03-22

申请号：US761149

申请日：1991-09-17

申请人： Yukio Miyashita ,  Hiroshi Mifune ,  Kunio Noguchi ,  Hironao Fukuchi

发明人： Yukio Miyashita ,  Hiroshi Mifune ,  Kunio Noguchi ,  Hironao Fukuchi

IPC分类号： F02D43/00 ,  F02D13/02 ,  F02D29/00 ,  F02D29/02 ,  F02D35/00 ,  F02D41/04 ,  F02D41/14 ,  F16H59/30 ,  F16H59/34 ,  F16H59/44 ,  F16H59/68 ,  F16H59/74 ,  F16H59/78 ,  F16H61/00

CPC分类号： B60W30/18 ,  B60W10/04 ,  B60W10/11 ,  B60W30/1819 ,  F02D29/02 ,  F02D35/0015 ,  F02D41/1486 ,  B60W2510/0225 ,  B60W2710/0616 ,  F02B2275/18 ,  F02D41/1456 ,  F16H2059/743 ,  F16H2061/0078 ,  F16H59/30 ,  F16H59/44 ,  F16H59/68 ,  F16H59/78 ,  Y02T10/56 ,  Y10T477/663 ,  Y10T477/679

摘要： An air-fuel ratio control method for an internal combustion engine. The air-fuel ratio of an air-fuel mixture supplied to the engine is feedback-controlled to a desired air-fuel ratio dependent on operating conditions of the engine. When a transmission is being shifted or before a predetermined time period elapses after the shifting, the desired air-fuel ratio is held at a value assumed immediately before the shifting of the transmission. In another form of the invention, when the transmission is being shifted, or when the operating characteristics of at least one set of a set of intake valves and a set of exhaust valves have been not changed before the predetermined time period elapses after the shifting of the transmission, the desired air-fuel ratio is held at a value assumed before the shifting of the transmission.

摘要翻译： 一种用于内燃机的空燃比控制方法。 供应到发动机的空气燃料混合物的空燃比根据发动机的运行条件被反馈控制到所需的空燃比。 当变速器正在移动时或在变速之后经过预定时间段之前，期望的空燃比保持在紧接变速器换档之前假设的值。 在本发明的另一形式中，当变速器正在移动时，或者当在一组进气门和一组排气门的至少一组之后的工作特性在经过移位之前的预定时间段之前没有改变时 在变速器中，期望的空燃比保持在变速器变速前假定的值。

公开(公告)号：US5186155A

公开(公告)日：1993-02-16

申请号：US810505

申请日：1991-12-19

申请人： Yukio Miyashita ,  Hiroshi Mifune ,  Kunio Noguchi ,  Hironao Fukuchi

发明人： Yukio Miyashita ,  Hiroshi Mifune ,  Kunio Noguchi ,  Hironao Fukuchi

IPC分类号： F02D29/00 ,  F02D41/04 ,  F02D41/14 ,  F02D45/00

CPC分类号： F02D41/1486 ,  F02D41/1446 ,  F02D41/1475 ,  F02D41/1479 ,  F02B2275/18 ,  F02D41/1456

摘要： An air-fuel ratio control method for an internal combustion engine. The air-fuel ratio of an air-fuel mixture supplied to the engine is feedback-controlled to a desired air-fuel ratio depending on operating conditions of the engine in response to output from an exhaust gas ingredient concentration sensor. The desired air-fuel ratio is settable to a value leaner than a stoichiometric air-fuel ratio when the temperature of the engine is above a predetermined reference value. The method comprises the steps of detecting a reduction ratio to which the transmission has been set, and changing the predetermined reference value of the temperature of the engine depending on the detected reduction ratio. The predetermined reference value of the temperature of the engine is set to a lower value as the reduction ratio of the transmission is smaller.

摘要翻译： 一种用于内燃机的空燃比控制方法。 供应到发动机的空气燃料混合物的空燃比根据来自排气成分浓度传感器的输出的发动机的运行条件反馈控制到期望的空燃比。 当发动机的温度高于预定的参考值时，期望的空燃比被设定为比理论空燃比更稀薄的值。 该方法包括以下步骤：根据检测到的减速比来检测变速器已设定的减速比，并改变发动机的温度的预定基准值。 当变速器的减速比较小时，将发动机的温度的规定的基准值设定为较低的值。

公开(公告)号：US5224454A

公开(公告)日：1993-07-06

申请号：US751478

申请日：1991-08-29

申请人： Yukio Miyashita ,  Kunio Noguchi ,  Hironao Fukuchi

发明人： Yukio Miyashita ,  Kunio Noguchi ,  Hironao Fukuchi

IPC分类号： F02D41/12 ,  F02D41/14

CPC分类号： F02D41/126 ,  F02B2275/18

摘要： An air-fuel ratio feedback control method for an internal combustion engine having an exhaust gas ingredient concentration sensor arranged in the exhaust passage and having output characteristics in approximate proportion to the concentration of an ingredient in exhaust gases from the engine, wherein when the engine is in a predetermined operating condition, the air-fuel ratio of an air-fuel mixture supplied to the engine is feedback-controlled to a desired air-fuel ratio dependent on the predetermined operating condition of the engine, and when the engine is in a predetermined deceleration condition, the fuel supply to the engine is cut off. When the engine has shifted from an operating condition other than the predetermined deceleration condition to the predetermined deceleration condition, the desired air-fuel ratio is held at a value assumed immediately before the engine shifts from the operating condition other than the predetermined deceleration condition to the predetermined deceleration condition, for a predetermined time period after the shifting. The feedback control of the air-fuel ratio is started with the held value as an initial value of the desired air-fuel ratio when the engine has shifted to the predetermined operating condition. Preferably, the desired air-fuel ratio is held at a value substantially corresponding to a central value of air-fuel ratio after the predetermined time period has elapsed.

摘要翻译： 一种用于内燃机的空燃比反馈控制方法，所述内燃机具有布置在排气通道中的排气成分浓度传感器，其输出特性与来自发动机的排气中成分的浓度大致成正比，其中当发动机为 在规定的运转状态下，供给发动机的空气燃料混合气的空燃比，根据发动机的预定运行状态进行反馈控制到期望的空燃比，在发动机为预定的情况下 减速条件下，发动机的燃油供应被切断。 当发动机从预定减速条件以外的运转状态转移到规定的减速条件时，期望的空燃比保持在紧接在发动机从预定的减速条件以外的运转状态转移到 预定的减速条件，在变速后的预定时间段内。 当发动机转移到预定的运行状态时，空燃比的反馈控制以保持值作为期望的空燃比的初始值开始。 优选地，在经过预定时间段之后，期望的空燃比保持在基本上对应于空燃比的中心值的值。

公开(公告)号：US5144931A

公开(公告)日：1992-09-08

申请号：US770257

申请日：1991-10-03

申请人： Yukio Miyashita ,  Hiroshi Mifune ,  Atsushi Matsubara ,  Kunio Noguchi

发明人： Yukio Miyashita ,  Hiroshi Mifune ,  Atsushi Matsubara ,  Kunio Noguchi

IPC分类号： F02D41/06 ,  F02D41/04 ,  F02D41/10 ,  F02D41/14

CPC分类号： F02D41/10 ,  F02D41/1487 ,  F02D41/1456

摘要： An air-fuel ratio control method for an internal combustion engine, in which the air-fuel ratio of a mixture supplied to the engine is feedback-controlled to a desired air-fuel ratio in response to output from an exhaust gas ingredient concentration sensor. When the engine is in a predetermined accelerating condition, fuel supply to the engine is increased. The rate of correction of the air-fuel ratio of the mixture by the feedback control is set to a smaller value when the engine is in the predetermined accelerating condition, than values to be set when the engine is in other operating conditions.

摘要翻译： 用于内燃机的空燃比控制方法，其中供应到发动机的混合物的空燃比响应于来自废气成分浓度传感器的输出被反馈控制到期望的空燃比。 当发动机处于预定加速状态时，对发动机的燃料供给增加。 当发动机处于预定加速状态时，通过反馈控制将混合物的空燃比校正的比率设定为比发动机处于其它运行状态时要设定的值更小的值。

公开(公告)号：US5199409A

公开(公告)日：1993-04-06

申请号：US878586

申请日：1992-05-05

申请人： Yukio Miyashita ,  Hiroshi Ohno ,  Shinichi Kubota

发明人： Yukio Miyashita ,  Hiroshi Ohno ,  Shinichi Kubota

IPC分类号： F02D41/14 ,  F02D45/00 ,  G01N27/419

CPC分类号： F02D41/1486 ,  F02D41/1477

摘要： A system for controlling an air/fuel ratio for an internal combustion engine, using an oxygen concentration sensor having a first chamber for introducing therein exhaust gas of the engine and a second chamber for introducing therein reference ambient air to detect oxygen content in the exhaust gas. In order to eliminate exhaust gas pulsation which could affect on detection accuracy, it is firstly determined if engine operation is in a transient state or in a normal state. Then the detected oxygen concentration value in the preceding cycle is added to the product obtained by multiplying the deviation between the values in the preceding and current cycles by a coefficient .alpha.. The coefficient is made different in the transient state and in the normal state. In the normal engine operation state, the coefficient .alpha. is determined from engine speed and load.

摘要翻译： 一种用于控制内燃机的空燃比的系统，其使用具有用于在其中引入发动机的排气的第一室的氧浓度传感器和用于在其中引入参考环境空气的第二室，以检测废气中的氧含量 。 为了消除可能影响检测精度的废气脉动，首先确定发动机运转是处于过渡状态还是处于正常状态。 然后，将前一周期中检测到的氧浓度值加到通过将前一周期和当前周期中的值之间的偏差乘以系数α而获得的乘积。 系数在过渡状态和正常状态下不同。 在正常发动机运转状态下，根据发动机转速和负荷确定系数α。

公开(公告)号：US5391282A

公开(公告)日：1995-02-21

申请号：US152090

申请日：1993-11-15

申请人： Yukio Miyashita ,  Hiroshi Ohno ,  Shinichi Kubota

发明人： Yukio Miyashita ,  Hiroshi Ohno ,  Shinichi Kubota

IPC分类号： G01N27/419 ,  F02D41/14 ,  G01N27/26 ,  G01N27/417

CPC分类号： F02D41/1495 ,  G01N27/4175

摘要： A system for determining an oxygen concentration sensor deterioration caused when foreign particles has clogged at a slit for introducing exhaust gas of an internal combustion engine to block the same. Since it is found by the inventors that sensor output fluctuates greatly between its maximum and minimum values in a TDC interval as the clogging increases, the deviation between the maximum and minimum is first calculated. The calculated deviation is then compared with a reference value and if it exceeds the reference value, the sensor is presumed to deteriorate. The reference value is varied on engine speed, engine load, or an air/fuel ratio of the engine.

摘要翻译： 一种用于确定当外部颗粒在用于引入内燃机的排气的狭缝处堵塞时阻止该氧浓度传感器劣化的系统。 由于本发明人发现，随着堵塞增加，传感器输出在TDC间隔的最大值和最小值之间大幅度波动，所以首先计算最大值与最小值之间的偏差。 然后将计算的偏差与参考值进行比较，并且如果超过参考值，则认为传感器劣化。 发动机转速，发动机负荷或发动机的空燃比变化。

公开(公告)号：US5165381A

公开(公告)日：1992-11-24

申请号：US781977

申请日：1991-10-24

申请人： Yukio Miyashita ,  Hiroshi Ohno

发明人： Yukio Miyashita ,  Hiroshi Ohno

IPC分类号： F02D41/04 ,  F02D41/14

CPC分类号： F02D41/1487 ,  F02D41/047 ,  F02B2275/18 ,  F02D41/1456

摘要： An air-fuel ratio control method for an internal combustion engine. An amount of fuel to be supplied to the engine is calculated in response to operating conditions of the engine and output from an exhaust gas ingredient concentration sensor, to thereby feedback-control the air-fuel ratio of a mixture supplied to the engine to a desired air-fuel ratio. The method comprises the steps of (1) calculating a fuel cooling correction value for compensating for a change in an actual air-fuel ratio caused by cooling effects of actually-injected fuel, according to at least one parameter which can determine the amount of fuel to be supplied to the engine, and (2) calculating the amount of fuel to be supplied to the engine by the use of the fuel cooling correction value.

摘要翻译： 一种用于内燃机的空燃比控制方法。 根据发动机的运转状况和从排气成分浓度传感器输出，计算供给到发动机的燃料量，从而将供给发动机的混合物的空燃比反馈至期望值 空燃比。 该方法包括以下步骤：（1）根据能够确定燃料量的至少一个参数，计算用于补偿由实际喷射的燃料的冷却效果引起的实际空燃比的变化的燃料冷却校正值 供给到发动机，以及（2）通过使用燃料冷却校正值来计算供给到发动机的燃料量。