公开(公告)号：US20090157282A1

公开(公告)日：2009-06-18

申请号：US12261876

申请日：2008-10-30

申请人： Seiji Asano ,  Yasukuni Kubo ,  Takayuki Ohbu ,  Keiichi Takayanagi ,  Shigeo Ohkuma ,  Shunji Fukui ,  Junichi Noda

发明人： Seiji Asano ,  Yasukuni Kubo ,  Takayuki Ohbu ,  Keiichi Takayanagi ,  Shigeo Ohkuma ,  Shunji Fukui ,  Junichi Noda

IPC分类号： F02D41/00

CPC分类号： F02D41/1403 ,  F02D41/1455 ,  F02D2041/1422 ,  F02D2041/1431 ,  G05B13/0255

摘要： Factors affecting the response time of a transfer system from the combustion of injected fuel to the detection of its oxygen concentration include a stroke delay time due to an engine speed, the dependence of an LAF sensor response time on an exhaust gas flow rate, a response time change of the LAF sensor due to its deterioration with time, and the like. If a hyperplane of the sliding mode is fixed without considering the above-mentioned factors affecting the response time of the transfer system, an overshoot or oscillation of a feedback system may occur at low speeds of the engine even if preferable feedback responsiveness can be achieved, for example, at high speeds of the engine. This results in aggravated exhaust emissions, degraded drivability due to torque fluctuations, and fluctuations in idle speed.A hyperplane used in a control system for providing feedback control of an air-fuel ratio through sliding mode control is varied based on the factors affecting the response time of the control system within a range in which the control system can be stabilized.

摘要翻译： 影响转移系统从燃料燃烧到其氧浓度的响应时间的因素包括由于发动机转速引起的冲程延迟时间，LAF传感器响应时间对废气流量的依赖性，响应 LAF传感器由于其随时间而劣化的时间变化等。 如果在考虑到影响传送系统的响应时间的上述因素的情况下固定滑模的超平面，即使可以实现优选的反馈响应，也可能在发动机的低速下发生反馈系统的过冲或振荡， 例如，在发动机的高速度。 这导致严重的废气排放，由于扭矩波动导致的驾驶性能下降以及怠速速度的波动。 在控制系统中用于通过滑动模式控制提供空燃比的反馈控制的超平面基于影响控制系统在其中可以稳定控制系统的范围内的响应时间的因素而变化。

公开(公告)号：US07017567B2

公开(公告)日：2006-03-28

申请号：US10806183

申请日：2004-03-23

申请人： Hajime Hosoya ,  Koji Takahashi ,  Shigeo Ohkuma

发明人： Hajime Hosoya ,  Koji Takahashi ,  Shigeo Ohkuma

IPC分类号： F02D45/00

CPC分类号： G01N27/4067 ,  F02D41/1494

摘要： A device according to the present invention is provided with element temperature measurement voltage application circuit for temporarily applying a predetermined voltage for element temperature measurement to a sensor element of an air-fuel ratio sensor equipped to an exhaust system of an internal combustion engine, first sensor output reading circuit for reading in a sensor output just before applied with the voltage, and second sensor output reading circuit for reading in a sensor output being applied with the voltage, wherein the element temperature of the air-fuel ratio sensor is estimated based on the sensor output just before applied with the voltage and the sensor output being applied with the voltage. Further, during internal resistance measurement of the sensor element of the air-fuel ratio sensor equipped to the exhaust system of the internal combustion engine, a voltage applied to the heater for heating the sensor element is maintained to be constant.

公开(公告)号：US06712054B2

公开(公告)日：2004-03-30

申请号：US09853872

申请日：2001-05-14

申请人： Hajime Hosoya ,  Koji Takahashi ,  Shigeo Ohkuma

发明人： Hajime Hosoya ,  Koji Takahashi ,  Shigeo Ohkuma

IPC分类号： F02D4500

CPC分类号： G01N27/4067 ,  F02D41/1494

摘要： A device according to the present invention is provided with element temperature measurement voltage application circuit for temporarily applying a predetermined voltage for element temperature measurement to a sensor element of an air-fuel ratio sensor equipped to an exhaust system of an internal combustion engine, first sensor output reading circuit for reading in a sensor output just before applied with the voltage, and second sensor output reading circuit for reading in a sensor output being applied with the voltage, wherein the element temperature of the air-fuel ratio sensor is estimated based on the sensor output just before applied with the voltage and the sensor output being applied with the voltage. Further, during internal resistance measurement of the sensor element of the air-fuel ratio sensor equipped to the exhaust system of the internal combustion engine, a voltage applied to the heater for heating the sensor element is maintained to be constant.

摘要翻译： 根据本发明的装置设置有元件温度测量电压施加电路，用于将元件温度测量的预定电压临时施加到装备到内燃机的排气系统的空燃比传感器的传感器元件，第一传感器 输出读取电路，用于在施加电压之前读取传感器输出;以及第二传感器输出读取电路，用于读取施加有电压的传感器输出，其中基于空燃比传感器的元件温度被估计 在施加电压之前的传感器输出和传感器输出被施加电压。 此外，在内燃机的排气系统的空燃比传感器的传感器元件的内阻检测中，施加到用于加热传感器元件的加热器的电压保持恒定。

公开(公告)号：US06609510B2

公开(公告)日：2003-08-26

申请号：US10003534

申请日：2001-12-06

申请人： Koji Takahashi ,  Shigeo Ohkuma

发明人： Koji Takahashi ,  Shigeo Ohkuma

IPC分类号： F02D4114

CPC分类号： F02D41/0295 ,  F01N2570/16 ,  F02D41/1454 ,  F02D41/182 ,  F02D2200/0814

摘要： An intake air quantity detected by an air flow meter is corrected based on a change speed of an engine load and on a change speed of an engine rotation speed, and an oxygen quantity stored in a catalytic converter is estimated based on the corrected intake air quantity and an oxygen concentration in the exhaust gas.

公开(公告)号：US06450158B2

公开(公告)日：2002-09-17

申请号：US09805946

申请日：2001-03-15

申请人： Koji Takahashi ,  Shigeo Ohkuma ,  Hajime Hosoya ,  Hidekazu Yoshizawa

发明人： Koji Takahashi ,  Shigeo Ohkuma ,  Hajime Hosoya ,  Hidekazu Yoshizawa

IPC分类号： F02D4114

CPC分类号： F02D41/1473 ,  F02D41/1403 ,  F02D41/1456

摘要： In a sliding mode control for restraining an air-fuel ratio state on a switching line set on a phase plane shown by a deviation between an actual air-fuel ratio and a target air fuel ratio, and a differential value of the deviation, an inclination of the switching line is made small, when the smaller an intake air quantity is, the longer a detection delay time of the air-fuel ratio is.

摘要翻译： 在实际空燃比和目标空燃比之间的偏差所示的在相位平面上设置的切换线上的空燃比状态和偏差的微分值的滑动模式控制中， ，当进气量越小，空燃比的检测延迟时间越长。

公开(公告)号：US06182642B2

公开(公告)日：2001-02-06

申请号：US09439992

申请日：1999-11-15

申请人： Shigeo Ohkuma

发明人： Shigeo Ohkuma

IPC分类号： F02M3302

CPC分类号： F02M25/0818

摘要： A leak detection apparatus for an evaporative emission control system is provided. By the apparatus, a current through a motor driven air pump is detected and determined as a judgment level when the air pump is ON and a directional control valve is in a position of connecting a fresh air inlet of a canister to an atmospheric vent, for thereby allowing air from the air pump to pass through a reference orifice of a bypass conduit and thereafter be released to the open air through the directional control valve. Then, it is established a condition in which the air pump is ON and the directional control valve is in a position of connecting the fresh air inlet to an outlet of the air pump so that air from the air pump passes through the directional control valve and the fresh air inlet of the canister and is supplied to the purge line, and this condition is maintained for a predetermined time. The predetermined time is made shorter as the temperature of fuel detected by a fuel temperature sensor is higher and a tank residual detected by a tank residual sensor is larger. At a measurement timing after lapse of the predetermined time, the current through the air pump is measured and determined as a leak level. When the leak level is lower than the judgment level, it is determined that a leak is present in the evaporative emission control system, i.e., a leak is present in a fuel vapor flow passage extending from a fuel tank to a purge control valve by way of the canister. A method of detecting a leak in an evaporative emission control system is also provided.

摘要翻译： 提供了一种用于蒸发排放控制系统的泄漏检测装置。 通过该装置，当气泵接通并且方向控制阀处于将罐的新鲜空气入口连接到大气排气口的位置时，检测并确定通过电动机驱动的空气泵的电流作为判断水平，并且确定 从而允许来自空气泵的空气通过旁路管道的参考孔，然后通过方向控制阀释放到露天。 然后，建立了空气泵接通的状态，方向控制阀处于将新鲜空气入口与空气泵的出口连接的位置，使得来自空气泵的空气通过方向控制阀， 罐的新鲜空气入口被供应到净化管线，并且该条件保持预定时间。 当由燃料温度传感器检测的燃料的温度较高并且由罐残留传感器检测到的罐残余物较大时，预定时间变短。 在经过预定时间之后的测量定时，测量通过空气泵的电流并将其确定为泄漏水平。 当泄漏水平低于判断水平时，确定在蒸发排放控制系统中存在泄漏，即，在从燃料箱延伸到排气控制阀的燃料蒸汽流动通道中存在泄漏 的罐子。 还提供了一种检测蒸发排放控制系统中的泄漏的方法。

公开(公告)号：US5850458A

公开(公告)日：1998-12-15

申请号：US429500

申请日：1995-04-26

申请人： Naoki Tomisawa ,  Shigeo Ohkuma

发明人： Naoki Tomisawa ,  Shigeo Ohkuma

IPC分类号： G01F9/00 ,  F02D45/00 ,  F02M35/12 ,  G10K11/178 ,  A61F11/06

CPC分类号： F02M35/125 ,  F02M35/1294 ,  F02M35/161 ,  G10K11/1786 ,  G10K2210/121 ,  G10K2210/1282 ,  G10K2210/3033

摘要： In an apparatus and method for actively reducing air intake noise of an air intake system of a vehicular internal combustion engine, a sound wave having approximately the same amplitude, and a phase shifted by 180.degree. from the air intake sound wave, is generated from a sound wave generator to cancel the air intake sound, which is unpleasant to vehicular occupants.

摘要翻译： 在用于主动地减少车辆内燃机的进气系统的进气噪声的装置和方法中，具有大致相同幅度的声波和从进气声波偏移180°的声音从 声波发生器取消进气声音，这对车辆乘客是不愉快的。

公开(公告)号：US06918385B2

公开(公告)日：2005-07-19

申请号：US10290250

申请日：2002-11-08

申请人： Shigeo Ohkuma ,  Futoshi Ichiyanagi

发明人： Shigeo Ohkuma ,  Futoshi Ichiyanagi

IPC分类号： G01D3/028 ,  F02D41/14 ,  F02D45/00 ,  G01D3/02 ,  G01N27/409

CPC分类号： F02D41/1486 ,  F02D41/1456 ,  F02D41/1496

摘要： A temperature of an oxygen concentration detector generating an electromotive force according to a difference between oxygen concentration in an engine exhaust gas and oxygen concentration in the atmosphere, is detected, and coefficients in a transformation for converting the electromotive force to a value having a characteristic linear to an air-fuel ratio is modified according to the temperature.

摘要翻译： 检测根据发动机排气中的氧浓度与大气中的氧浓度之间的差产生电动势的氧浓度检测器的温度，将电动势变换为具有特征线性的值的变换中的系数 空燃比根据温度而变化。

公开(公告)号：US06723965B2

公开(公告)日：2004-04-20

申请号：US09886222

申请日：2001-06-22

申请人： Shigeo Ohkuma ,  Hiroyuki Ohsaki

发明人： Shigeo Ohkuma ,  Hiroyuki Ohsaki

IPC分类号： H05B102

CPC分类号： F02D41/1494 ,  F02D41/1454 ,  F02D41/1496 ,  F02D41/187 ,  F02D2200/0414

摘要： According to the present invention, when controlling a heater in an air-fuel ratio sensor, a crack of sensor element due to an exhaust condensed water is certainly avoided. To this end, an element temperature is detected by measuring an impedance of the sensor element and a power supply amount to the heater for heating the sensor element is feedback controlled so that the element temperature reaches a target temperature. Here, the target temperature is set to a lower side temperature, compared to other conditions, on a condition that a wall temperature of an exhaust system is low and a water content in the exhaust is condensed in the exhaust system. Or, an initial value of the power supply amount is set corresponding to the element temperature before the start of power supply to the heater. Or, an increase component of the power supply amount is set corresponding to the element temperature, and the power supply amount to the heater is feedforward controlled so as to be increased gradually by each predetermined increase component from a predetermined initial value.

摘要翻译： 根据本发明，当控制空燃比传感器中的加热器时，肯定避免了由于排出冷凝水引起的传感器元件的裂纹。 为此，通过测量传感器元件的阻抗来检测元件温度，并且反馈控制用于加热传感器元件的加热器的电源量，使得元件温度达到目标温度。 这里，在排气系统的壁温低且排气中的水分浓缩在排气系统中的情况下，与其他条件相比，将目标温度设定为较低的温度。 或者，将供电量的初始值设定为对加热器供电开始前的元件温度。 或者，对应于元件温度设定供电量的增加分量，并且对来自加热器的供电量进行前馈控制，以便从预定的初始值逐渐增加预定的增加分量。

公开(公告)号：US06576118B2

公开(公告)日：2003-06-10

申请号：US09778905

申请日：2001-02-08

申请人： Shigeo Ohkuma

发明人： Shigeo Ohkuma

IPC分类号： G01N2741

CPC分类号： G01N27/4175

摘要： According to the present invention, there is provided: a sensor element including an oxygen concentration detection section consisting of solid electrolyte for outputting a detection signal corresponding to an oxygen concentration in a hollow chamber to which an exhaust of an internal combustion engine is introduced and an oxygen pump section for controlling an electric current to be applied to a solid electrolyte wall that divides the hollow chamber from an exhaust side of the engine so that the oxygen concentration in the hollow chamber becomes a predetermined oxygen concentration, to flow oxygen into/out of the hollow chamber; an air-fuel ratio detection circuit for outputting an air-fuel ratio detection value based on the electric current applied to the solid electrolyte wall by the oxygen pump section; and a pump current cut off circuit for cutting off the power supply to the solid electrolyte wall by the oxygen pump section, and a detection value of air-fuel ratio is corrected based on an output value of the air-fuel ratio detection circuit of when the power supply to the solid electrolyte wall by the oxygen pump section is cut off by the pump current cut off circuit, while detecting the air-fuel ratio over a wide range.

摘要翻译： 根据本发明，提供一种传感器元件，其包括氧浓度检测部分，该氧浓度检测部分由固体电解质组成，用于输出对应于引入内燃机排气的中空室中的氧浓度的检测信号， 氧气泵部分，用于控制施加到固体电解质壁的电流，所述固体电解质壁将中空室与发动机的排气侧分隔开，使得中空室中的氧浓度变为预定的氧浓度，以将氧气输入/ 中空室; 空燃比检测电路，用于基于由氧泵部分施加到固体电解质壁的电流输出空燃比检测值; 以及泵电流切断电路，用于通过氧气泵部切断对固体电解质壁的供电，并且基于空燃比检测电路的输出值，校正空燃比的检测值 通过泵浦电流切断电路切断氧泵部分对固体电解质壁的供电，同时在宽范围内检测空燃比。