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    • 2. 发明授权
    • Air-fuel ratio control system for internal combustion engines
    • 内燃机空燃比控制系统
    • US5947096A
    • 1999-09-07
    • US937747
    • 1997-09-25
    • Naohiro KurokawaToru KitamuraAkira Kato
    • Naohiro KurokawaToru KitamuraAkira Kato
    • F02D41/00F02D41/14F02D41/22F02D41/34F02D41/36
    • F02D41/008F02D41/1401F02D41/1456F02D41/1458F02D2041/1409F02D2041/1415F02D2041/1416F02D2041/1417F02D2041/1418F02D2041/1431F02D2041/1433
    • An air-fuel ratio control system for an internal combustion engine includes an air-fuel ratio sensor for detecting the air-fuel ratio of exhaust gases from the engine. An ECU estimates the air-fuel ratio of a mixture supplied to each of the cylinders cylinder by cylinder in response to an output from the air-fuel ratio sensor, by using an observer based on a model representative of the behavior of the exhaust system. Cylinder-by-cylinder air-fuel ratio control amounts corresponding respectively to the cylinders are calculated for carrying out feedback control of the air-fuel ratio of the mixture such that each of the estimated air-fuel ratio is converged to a desired value. One of the cylinder-by-cylinder air-fuel ratio control amounts corresponding to one of the cylinders is held at a predetermined value, and it is determined whether relationships in value between ones of the cylinder-by-cylinder air-fuel ratio control amounts corresponding respectively to cylinders other than the one cylinder and a plurality of predetermined determination values meet a predetermined determination pattern. When the relationships meet the predetermined determination pattern, it is determined that the response speed of the air-fuel ratio sensor has changed.
    • 用于内燃机的空燃比控制系统包括用于检测来自发动机的废气的空燃比的空燃比传感器。 ECU基于来自空燃比传感器的输出,通过使用基于表示排气系统的行为的模型的观察者来估计供给到每个汽缸的气缸的气体的空燃比。 计算分别对应于气缸的圆柱体空燃比控制量,以进行混合物的空燃比的反馈控制,使得每个估计空燃比收敛到期望值。 将与其中一个气缸相对应的逐个缸体空燃比控制量中的一个保持在预定值,并且确定是否在每个缸缸空燃比控制量之间的值之间的关系 分别对应于一个气缸以外的气缸,并且多个预定的确定值满足预定的确定模式。 当这些关系满足预定的确定模式时,确定空燃比传感器的响应速度已经改变。
    • 5. 发明授权
    • Evaporative emission control system for internal combustion engine
    • 内燃机蒸发排放控制系统
    • US06330879B1
    • 2001-12-18
    • US09604403
    • 2000-06-27
    • Toru KitamuraNorio SuzukiNaohiro KurokawaTetsuya Ishiguro
    • Toru KitamuraNorio SuzukiNaohiro KurokawaTetsuya Ishiguro
    • F02M3302
    • F02M25/08F02D41/004F02D2200/0406
    • Disclosed herein is an evaporative emission control system which can prevent changes in fuel component in the fuel tank and vacuum boiling in the fuel pump to thereby accurately control the air-fuel ratio to a desired value and ensure smooth supply of the fuel. The control system includes an evaporative fuel passage for connecting a fuel tank and an intake system of an internal combustion engine, and a control valve is provided in the evaporative fuel passage for opening and closing the evaporative fuel passage. It is determined whether or not a pressure in the tank is higher than or equal to a pressure value obtained by adding a pressure in the intake system. If the pressure in the tank is higher than or equal to the pressure value, the opening operation of the control valve is enabled.
    • 这里公开了一种蒸发排放控制系统,其能够防止燃料箱中的燃料成分的变化和燃料泵中的真空沸腾,从而将空燃比精确地控制为期望值,并确保燃料的平稳供给。 控制系统包括用于连接燃料箱和内燃机的进气系统的蒸发燃料通道,并且在蒸发燃料通道中设置有用于打开和关闭蒸发燃料通道的控制阀。 确定罐中的压力是否高于或等于通过在进气系统中增加压力而获得的压力值。 如果罐中的压力高于或等于压力值,则控制阀的打开操作成为可能。