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：US06453229B1

公开(公告)日：2002-09-17

申请号：US09691209

申请日：2000-10-19

申请人： Shigeo Ohkuma ,  Koji Takahashi ,  Satoru Watanabe ,  Hajime Hosoya ,  Hidekazu Yoshizawa ,  Haruhiro Iwaki

发明人： Shigeo Ohkuma ,  Koji Takahashi ,  Satoru Watanabe ,  Hajime Hosoya ,  Hidekazu Yoshizawa ,  Haruhiro Iwaki

IPC分类号： F02D4114

CPC分类号： F02D41/1403 ,  F02D41/1454 ,  F02D2041/1422 ,  F02D2250/12

摘要： In an air-fuel ratio feedback control of an internal combustion engine aimed to approximate an air-fuel ratio to a target air-fuel ratio set according to operating conditions of the engine, the feedback control is carried out using the feedback control amount which is computed according to a sliding mode control, having a deviation between the target air-fuel ratio and the detected air-fuel ratio detected by the air-fuel ratio sensor set as a switching function. According to the present invention, a simple air-fuel ratio feedback control is carried out according to an accurate sliding mode control with no dispersion for each engine, that is easy to design, and that can be applied generally to any kind of vehicle or engine. Further, by varying the feedback gain depending on operating conditions, by controlling the computing cycle of the feedback control amount, or by performing a Smith dead time compensation control, the influence provided by the dead time element existing in the control object is eliminated, thereby ensuring the response characteristic and stability of the control system.

摘要翻译： 在旨在将空燃比近似为根据发动机的运转条件设定的目标空燃比的内燃机的空燃比反馈控制中，使用反馈控制量进行反馈控制 根据滑动模式控制计算出具有由作为切换功能的空燃比传感器检测出的目标空燃比与检测空燃比之间的偏差。 根据本发明，简单的空燃比反馈控制是根据准确的滑动模式控制执行的，每个发动机没有分散，易于设计，并且可以普遍适用于任何种类的车辆或发动机 。 此外，通过根据操作条件改变反馈增益，通过控制反馈控制量的计算周期，或者通过执行史密斯死时补偿控制，消除由存在于控制对象中的死区元素提供的影响，由此 确保控制系统的响应特性和稳定性。

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：US06453896B2

公开(公告)日：2002-09-24

申请号：US09810605

申请日：2001-03-19

申请人： Koji Takahashi ,  Shigeo Ohkuma

发明人： Koji Takahashi ,  Shigeo Ohkuma

IPC分类号： F02D4114

CPC分类号： F02D41/1456 ,  F02D41/1401 ,  F02D2041/143

摘要： A non-linear term UNL is computed as UNL=gain GNL×(air-fuel ratio detection value−target air-fuel ratio)/(|air-fuel ratio detection value−target air-fuel ratio|)+previous value UNL (OLD), and a linear term UL is computed as UL=gain GL×(air-fuel ratio detection value−target air-fuel ratio)/air-fuel ratio detection value. An addition of UNL and UL is set as an air-fuel ratio feedback correction coefficient to correct a fuel injection quantity. The gain GL is set a greater value as |air-fuel ratio detection value−target air-fuel ratio| becomes greater.

摘要翻译： 非线性项UNL被计算为UNL =增益GNLx（空燃比检测值 - 目标空燃比）/（|空燃比检测值 - 目标空燃比|）+先前值UNL（OLD ），并且线性项UL被计算为UL =增益GLx（空燃比检测值 - 目标空燃比）/空燃比检测值。 将UNL和UL的添加设置为空燃比反馈校正系数以校正燃料喷射量。 增益GL被设定为更大的值作为|空燃比检测值 - 目标空燃比| 变得更大。

公开(公告)号：US06644017B2

公开(公告)日：2003-11-11

申请号：US10005336

申请日：2001-12-07

申请人： Koji Takahashi ,  Shigeo Ohkuma

发明人： Koji Takahashi ,  Shigeo Ohkuma

IPC分类号： F01N300

CPC分类号： F02D41/1498 ,  F02D41/0295 ,  F02D41/1456 ,  F02D41/1488 ,  F02D41/187 ,  F02D2200/0404 ,  F02D2200/0814 ,  F02D2200/1015 ,  F02D2200/501 ,  F02D2200/602

摘要： In a system in which an oxygen quantity stored in a catalytic converter is estimated to feedback control a fuel injection quantity based on the estimated oxygen quantity, when a predetermined period of time has not yet passed from an occurrence of misfire and from the end of misfire, the update of the oxygen quantity is suspended, and also, when the predetermined period of time has not yet passed from the end of misfire, the fuel injection quantity is decreasingly corrected and the oxygen quantity is reset after the predetermined period of time has passed.

公开(公告)号：US06453895B2

公开(公告)日：2002-09-24

申请号：US09808402

申请日：2001-03-15

申请人： Koji Takahashi ,  Shigeo Ohkuma

发明人： Koji Takahashi ,  Shigeo Ohkuma

IPC分类号： F02D4114

CPC分类号： F02D41/1403 ,  F02D41/0042 ,  F02D41/1456 ,  F02D2041/143

摘要： An air-fuel ratio feedback control of an internal combustion engine is performed, by a sliding mode control, by computing an air-fuel ratio feedback control amount including a linear term and a nonlinear term, and at the time of when switching a target air-fuel ratio or at the time of when switching the operating condition, such as the cutting of purge, where the air-fuel ratio is changed, the nonlinear term is initializing to a predetermined value corresponding to the post-switched operating condition.

摘要翻译： 通过滑动模式控制，通过计算包括线性项和非线性项的空燃比反馈控制量，并且在切换目标空气时执行内燃机的空燃比反馈控制 - 在燃料比变化的情况下，例如切换吹扫时，将非线性项初始化为对应于后切换动作状态的规定值的切换操作状态时。

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。