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    • 2. 发明授权
    • Air-fuel ratio control device for internal combustion engine and method thereof
    • 用于内燃机的空燃比控制装置及其方法
    • US06453229B1
    • 2002-09-17
    • US09691209
    • 2000-10-19
    • Shigeo OhkumaKoji TakahashiSatoru WatanabeHajime HosoyaHidekazu YoshizawaHaruhiro Iwaki
    • Shigeo OhkumaKoji TakahashiSatoru WatanabeHajime HosoyaHidekazu YoshizawaHaruhiro Iwaki
    • F02D4114
    • F02D41/1403F02D41/1454F02D2041/1422F02D2250/12
    • 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.
    • 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。
    • 6. 发明授权
    • Air-fuel ratio control apparatus of internal combustion engine and method thereof
    • 内燃机空燃比控制装置及其方法
    • US06854262B2
    • 2005-02-15
    • US10472392
    • 2003-09-22
    • Hidekazu YoshizawaHajime Hosoya
    • Hidekazu YoshizawaHajime Hosoya
    • F01N3/24F01N9/00F02D41/02F02D41/14F01N3/00
    • F01N9/005F02D41/0295F02D41/1441F02D41/1458F02D41/1479F02D41/187F02D2041/1433F02D2200/0814Y02T10/47
    • The present invention has an object to provide an air-fuel ratio control apparatus of an internal combustion engine and a method thereof, for estimating with high accuracy an oxygen adsorption amount in an exhaust purification catalyst, and controlling the oxygen adsorption amount in the exhaust purification catalyst at an optimum amount, thereby enabling to maintain high exhaust purification efficiency. To this end, in the present invention, there is stored a catalyst model that receives an oxygen amount which is not used for the oxidization/reduction in an exhaust purification catalyst disposed on an exhaust passage of an engine, and outputs an oxygen concentration in an exhaust gas downstream of the exhaust purification catalyst, the oxygen amount which is not used for the oxidization/reduction in the exhaust purification catalyst is calculated based on the oxygen concentration in the exhaust gas upstream of the exhaust purification catalyst and an engine intake air amount, parameters of the catalyst model are sequentially estimated based on the calculated oxygen amount and the oxygen concentration in the exhaust gas downstream of the exhaust purification catalyst, an oxygen adsorption amount in the exhaust purification catalyst is calculated using the estimated parameters of the catalyst model, thereby feedback controlling an air-fuel ratio upstream of the exhaust purification catalyst so that the calculated oxygen adsorption amount reaches an optimum oxygen adsorption amount.
    • 本发明的目的是提供一种内燃机的空燃比控制装置及其方法,用于高精度地估计排气净化催化剂中的氧吸附量,并且控制排气净化中的氧吸附量 催化剂,从而能够保持高排气净化效率。 为此,在本发明中,存储了在配置在发动机的排气通路上的排气净化催化剂中接收不用于氧化还原的氧量的催化剂模型,并且输出氧浓度 排气净化催化剂下游的排气,基于排气净化催化剂上游的排气中的氧浓度和发动机进气量,算出不用于排气净化催化剂的氧化还原的氧量, 基于计算出的氧量和排气净化催化剂下游的废气中的氧浓度依次估计催化剂模型的参数,使用催化剂模型的估计参数计算排气净化催化剂中的氧吸附量,由此 反馈控制排气净化气体上游的空燃比 使得计算的氧吸附量达到最佳的氧吸附量。
    • 8. 发明授权
    • Apparatus for determining wall thickness of microcapsule
    • 用于测定微胶囊壁厚的装置
    • US07280231B2
    • 2007-10-09
    • US10792869
    • 2004-03-05
    • Hidekazu YoshizawaMasaki Hayashi
    • Hidekazu YoshizawaMasaki Hayashi
    • G01B11/28
    • G01B11/0625G01N15/1456G01N2015/025G01N2015/1493
    • A thickness-determining apparatus for determining a wall thickness of a microcapsule having a refractive index n1 comprises a sensor 1 for detecting a light scattering intensity data I1 with respect to the microcapsule dispersed in a medium having a refractive index n1, and a light scattering intensity data I2 with respect to the microcapsule dispersed in a medium having a refractive index n2; a memory circuit 3 for storing a theoretical equation correlating a light scattering intensity characteristic with a particle size; and an arithmetic circuit 5 for calculating an inner diameter r1 and an outer diameter r2 from the theoretical equation based on the light scattering intensity data I1 and I2, and calculating the wall thickness.
    • 用于确定折射率n 1的微胶囊的壁厚的厚度测定装置包括用于检测相对于分散在折射率为n 1的介质中的微胶囊的光散射强度数据I 1的传感器1,以及 相对于分散在折射率n 2的介质中的微胶囊的光散射强度数据I 2; 存储电路3,用于存储将光散射强度特性与粒度相关的理论方程; 以及用于基于光散射强度数据I 1和I 2从理论方程计算内径r 1和外径r 2并计算壁厚的算术电路5。