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    • 3. 发明授权
    • Failure diagnosis apparatus for exhaust gas recirculation system
    • 废气再循环系统故障诊断装置
    • US06508111B2
    • 2003-01-21
    • US09793387
    • 2001-02-27
    • Satoru OsakiToshio HoriOsamu MatsunoTakeshi Tsuyuki
    • Satoru OsakiToshio HoriOsamu MatsunoTakeshi Tsuyuki
    • G01M1500
    • F02D41/0072F02D21/08F02D41/0055F02D41/221F02D2200/0402F02D2200/0406F02D2200/0408F02M26/13F02M26/49Y02T10/47
    • To provide a failure diagnosis apparatus for an exhaust gas recirculation system which is capable of eliminating the influence of various disturbance factors that vary the suction air pressure, diagnosing a failure of the exhaust gas recirculation system on the basis of the suction air pressure, and preventing wrong diagnosis. A failure diagnosis apparatus for an exhaust gas recirculation system consists of a fresh air pressure estimating device 2911 for calculating an estimated fresh air pressure inside a suction pipe from the operating condition of an internal combustion engine, an actual EGR (exhaust gas recirculation) gas pressure estimating device 2914 for estimating an EGR gas pressure on the basis of a measured suction pipe pressure detected by a suction pipe pressure detecting device 2911 and an estimated fresh air pressure calculated above, and a failure judging device 2910 for judging the failure on the basis of the estimated EGR gas pressure and the detected operating condition.
    • 为了提供排气再循环系统的故障诊断装置,其能够消除改变吸入空气压力的各种扰动因素的影响,基于吸入空气压力诊断废气再循环系统的故障,并且防止 错误诊断 用于排气再循环系统的故障诊断装置由新鲜空气压力估计装置2911组成,用于从内燃机的运行状态,实际的EGR(废气再循环)气体压力计算吸入管内的估计新鲜空气压力 基于由吸入管压力检测装置2911检测到的测定吸管压力和上述计算的新鲜空气压力估计EGR气体压力的估计装置2914,以及基于以下计算的故障判定装置2910: 估计的EGR气体压力和检测到的操作条件。
    • 5. 发明授权
    • Diagnostic system for variable valve timing control system
    • 可变气门正时控制系统诊断系统
    • US5644073A
    • 1997-07-01
    • US656685
    • 1996-05-31
    • Osamu MatsunoKatsuhiko Kawamura
    • Osamu MatsunoKatsuhiko Kawamura
    • F02B77/08F01L1/34F01L13/00F02D13/02F02D41/22F02D45/00
    • F02D41/221F01L1/34F02D13/0215F02D13/0234F01L2201/00F02B2275/18F02D2041/001Y02T10/18
    • A diagnostic system makes a diagnosis on a variable valve timing control system mounted on an internal combustion engine by forcibly switching the valve timing control system from an operative state to an in operative state. The diagnostic system comprises sensors for detecting a variation of an operating state of an internal combustion engine, based on the forcible switching operation, and for detecting a throttle valve opening of the engine. The diagnostic system makes the diagnosis by comparing a variation of rate of flow of intake-air with a predetermined reference value to determine whether the valve timing control system operates normally or abnormally. The diagnostic system provides both a predetermined diagnostic preparatory period and a predetermined actual diagnostic period. The diagnostic system calculates a variation of the throttle valve opening, varied from the throttle valve opening detected at the beginning of the predetermined diagnostic preparatory period before the forcible switching operation, and inhibits the diagnosis of the valve timing control system when the variation of the throttle valve opening exceeds a predetermined threshold.
    • 诊断系统通过将气门正时控制系统从操作状态强制切换到工作状态来对安装在内燃机上的可变气门正时控制系统进行诊断。 诊断系统包括用于基于强制切换操作检测内燃机的运行状态的变化并且用于检测发动机的节气门开度的传感器。 诊断系统通过将进气量的流量变化与预定的参考值进行比较来确定是否正常或异常地运行气门正时控制系统。 诊断系统同时提供预定的诊断准备期和预定的实际诊断期。 诊断系统计算出在强制切换操作之前在预定诊断准备期间开始时检测到的节气门开度变化的节气门开度的变化,并且当节流阀的变化时,禁止气门正时控制系统的诊断 阀开度超过预定阈值。
    • 8. 发明授权
    • Air/fuel ratio control system for engine
    • 发动机空燃比控制系统
    • US5483945A
    • 1996-01-16
    • US209048
    • 1994-03-11
    • Masato KobayashiOsamu MatsunoYouichi KishimotoKatsuhiko Kawamura
    • Masato KobayashiOsamu MatsunoYouichi KishimotoKatsuhiko Kawamura
    • F02D45/00F02D41/14
    • F02D41/248F02D41/2445F02D41/2454F02D41/2483
    • A learning control system for controlling an air fuel ratio an engine employs a slowly updated second learning control variable in addition to a normally updated first learning control variable in order to utilize the learning function sufficiently even when a deviation of the air fuel ratio exceeds the learning range of the first variable. The control system according to an illustrated embodiment of the invention identifies a current engine operating area among a plurality of such areas, in accordance with a sensed engine operating condition, obtains a value of the first learning variable corresponding to the identified operating area, and a value of the second learning variable, determines a learning quantity which is a sum of the first and second learning variables by using the obtained values, and uses this learning quantity for determining a desired fuel supply quantity. The second learning variable is updated slowly whereas the first learning variable is updated in a sensitive and speedy manner.
    • 用于控制空燃比的学习控制系统除了通常更新的第一学习控制变量之外,还采用缓慢更新的第二学习控制变量,以便即使当空燃比的偏差超过学习时也能充分利用学习功能 第一个变量的范围。 根据本发明示出的实施例的控制系统根据所感测到的发动机操作条件识别多个这样的区域中的当前发动机操作区域,获得与所识别的操作区域相对应的第一学习变量的值,以及 第二学习变量的值通过使用获得的值来确定作为第一学习变量和第二学习变量的和的学习量,并且使用该学习量来确定期望的燃料供给量。 第二个学习变量被缓慢地更新,而第一个学习变量以敏感和快速的方式更新。