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    • 121. 发明授权
    • Secondary air supply apparatus and control method for the same
    • 二次供气装置及其控制方法相同
    • US08015804B2
    • 2011-09-13
    • US10578747
    • 2005-08-15
    • Tomokazu Muraguchi
    • Tomokazu Muraguchi
    • F01N3/00F01N3/10
    • F01N3/22F01N3/32F01N11/00F01N13/011F01N13/107F01N2550/14F02D41/0002F02D41/062F02D2200/0406Y02T10/20Y02T10/42Y02T10/47
    • An ECU executes (300) a program including a step (S202) of opening an electromagnetic ASV (232) while a vacuum pressure ASV (1) and a vacuum pressure ASV (2) are controlled so as to be closed, and an air pump (200) is controlled so as to be stopped in a case where an air amount GA that is an amount of air introduced into an engine (100) is equal to or larger than a predetermined air amount GA (0), and a coolant temperature TW at the starting time of the engine is equal to or higher than a predetermined coolant temperature TW (0) (“YES” in step S200); a step (S204) of detecting a pressure; a step (S206) of closing the electromagnetic ASV; and a step (S402) of determining that failure has occurred in at least one of the vacuum pressure ASV (1) and the vacuum pressure ASV (2), that is, one of the vacuum pressure ASV (1) and the vacuum pressure ASV (2) remains in an opened state and cannot be closed when there is a pulsation of the pressure that is detected while the electromagnetic ASV is opened (“YES” in step S400).
    • ECU执行(300)包括打开电磁ASV(232)的步骤(S202)的程序,同时将真空压力ASV(1)和真空压力ASV(2)控制为关闭,并且将空气泵 (200)被控制为在作为引入发动机(100)的空气量的空气量GA等于或大于预定空气量GA(0)的情况下停止,并且冷却剂温度 发动机起动时的TW等于或高于预定的冷却剂温度TW(0)(步骤S200中的“是”)。 检测压力的步骤(S204) 关闭电磁ASV的步骤(S206) 以及确定在真空压力ASV(1)和真空压力ASV(2)中的至少一个中发生故障的步骤(S402),即真空压力ASV(1)和真空压力ASV (2)保持打开状态,并且当电磁ASV打开时检测到的压力脉动时,不能关闭(步骤S400中为“是”)。
    • 125. 发明授权
    • Failure diagnosis apparatus for secondary air supplier
    • 二次空气供应器故障诊断装置
    • US07107758B2
    • 2006-09-19
    • US10814168
    • 2004-04-01
    • Shigemasa Hirooka
    • Shigemasa Hirooka
    • F01N3/00
    • F01N3/34F01N3/22F01N2550/14F02D41/221Y02T10/20Y02T10/40Y02T10/42
    • A failure diagnosis apparatus for secondary air supplier according to the present invention determines a failure of a secondary air supplier based on pressure and pressure pulsation in a secondary air supply path. A failure diagnosis is made by determining the presence or absence of pressure pulsation in the secondary air supply path based on a determination threshold, and in the present invention the determination threshold is varied according to a pressure value in the secondary air supply path (a smoothed value or an average value of measured pressure). This permits the apparatus to make an accurate failure diagnosis, while eliminating pressure pulsations except for that due to exhaust pulsation (e.g., that due to noise of the pressure sensor and that caused by surging of an air pump).
    • 根据本发明的用于二次空气供应器的故障诊断装置基于二次空气供应路径中的压力和压力脉动来确定二次空气供应器的故障。 通过基于确定阈值确定二次空气供给路径中的压力脉动的存在或不存在来进行故障诊断,并且在本发明中,确定阈值根据二次空气供应路径中的压力值(平滑的 值或测量压力的平均值)。 这允许装置进行准确的故障诊断,同时除去由于排气脉动(例如,由于压力传感器的噪声和由气泵的喘振引起的)脉动的压力脉动。