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    • 21. 发明授权
    • Misfire detection system for vehicle multicylinder internal combustion engine
    • 车用多缸内燃机失火检测系统
    • US06799453B2
    • 2004-10-05
    • US10372943
    • 2003-02-26
    • Atsuhiro MiyauchiKojiro Tsutsumi
    • Atsuhiro MiyauchiKojiro Tsutsumi
    • G01M1500
    • F02D41/1498F02D41/22F02D2041/1432F02D2041/288F02D2200/1015F02D2200/501F02D2200/702G01M15/11
    • A system for detecting misfire occurred in an internal combustion engine installed in a vehicle, based on a rotation signal outputted by an engine speed sensor. In the system, first and second fluctuation value of the wheel rotation speed are calculated based on a signal, outputted by a wheel speed sensor, indicating a rotation speed of the vehicle wheel, and a parameter indicative of a degree of wheel rotation speed fluctuation is calculated by multiplying the calculated first and second fluctuation values. Then, the parameter is compared with a threshold value and when the number of times the parameter was equal to or greater than the threshold value has reached a predetermined value, it is discriminated that the vehicle is under a rough road running condition that affects the misfire detection and the misfire detection is disabled. With this, it becomes possible to reliably avoid false detection of misfire while ensuring that misfire detection is not erroneously disabled when misfire does occur.
    • 基于由发动机转速传感器输出的旋转信号,在车内安装的内燃机中发生用于检测失火的系统。 在该系统中,基于由车轮速度传感器输出的指示车轮的转速的信号计算车轮转速的第一和第二变动值,并且表示车轮转速变动程度的参数为 通过乘以计算的第一和第二波动值来计算。 然后,将参数与阈值进行比较,并且当参数等于或大于阈值的次数已经达到预定值时,判别车辆处于影响失火的粗糙的道路行驶状态 检测和失火检测被禁用。 由此,可以可靠地避免错误的失火检测,同时确保在发生失火时不会错误地禁用失火检测。
    • 22. 发明授权
    • Air bypass valve failure detection device in supercharging device for engine
    • 发动机增压装置中的旁通阀故障检测装置
    • US07578128B2
    • 2009-08-25
    • US11878117
    • 2007-07-20
    • Atsuhiro MiyauchiHirofumi HaraKazuhiko ImamuraYoshinori Andou
    • Atsuhiro MiyauchiHirofumi HaraKazuhiko ImamuraYoshinori Andou
    • F02B33/00
    • F02D41/221F02B37/16F02D41/0007F02D2200/0406Y02T10/144
    • An air bypass valve failure detecting device outputs an opening command to an air bypass valve when a throttle valve suddenly closes, thereby prevent surging from occurring in a second intake passage between a turbocharger and a throttle valve. When the opening command is outputted to the air bypass valve, failure detection for the air bypass valve is permitted only if an intake air quantity of an engine immediately before a closing command is changed to the opening command is equal to or larger than a predetermined value. Thus, it is possible to prevent the failure detecting device from erroneously determining that the air bypass valve is normal although valve closing failure of the air bypass valve has occurred. This is because, when the intake air quantity is smaller than the predetermined value, surging does not occur in the second intake passage even if the valve closing failure of the airy bypass valve has occurred.
    • 当节气门突然闭合时,空气旁通阀故障检测装置向空气旁通阀输出打开命令,从而防止在涡轮增压器和节流阀之间的第二进气通道中发生喘振。 当打开命令被输出到空气旁通阀时,只有紧接关闭命令之前的发动机的进气量改变为打开命令,才允许空气旁通阀的故障检测等于或大于预定值 。 因此,尽管发生了空气旁通阀的关闭故障,但是可以防止故障检测装置错误地确定空气旁通阀是正常的。 这是因为,当进气量小于预定值时,即使发生通风旁通阀的关闭故障,也不会在第二进气通道中产生喘振。