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    • 37. 发明专利
    • Egr control device of internal combustion engine
    • 内燃机EGR控制装置
    • JP2013002375A
    • 2013-01-07
    • JP2011134842
    • 2011-06-17
    • Denso Corp株式会社デンソー
    • ICHIHARA HIDEAKINOGAMI HIROYAKUZUHARA KOJITAKEZOE HIROYUKI
    • F02M25/07F02D21/08
    • F02D41/1498F02D41/0055F02D41/0065F02D41/08F02D41/2438F02D41/2441F02D41/2464F02D2250/16F02M26/48F02P5/1508Y02T10/46Y02T10/47
    • PROBLEM TO BE SOLVED: To accurately learn a full closure position (opening of becoming minimum in an EGR gas flow rate) of an EGR valve, in an engine having an EGR device.SOLUTION: After repeating treatment for calculating an engine rotation variation (for example, a standard deviation of an engine rotating speed) by respectively increasing opening of the EGR valve 26 by a predetermined step quantity from predetermined opening (for example, the full closure position on design), until the opening of the EGR valve 26 becomes a predetermined value or more, in idle operation, the treatment for calculating the engine rotation variation by respectively reducing the opening of the EGR valve 26 by the predetermined step quantity from the predetermined opening, is repeated until the opening of the EGR valve 26 becomes the predetermined value or less. Thus, when increasing and reducing the opening of the EGR valve 26, a maximum value of the opening of the EGR valve 26 of becoming minimum in the engine rotation variation, is learnt as the full closure position. Alternatively, an average value of the maximum value and a minimum value of the opening of the EGR valve 26 of becoming minimum in the engine rotation variation, may be learnt as the full closure position.
    • 要解决的问题:在具有EGR装置的发动机中,准确地获知EGR阀的完全关闭位置(EGR气体流量的最小值的开度)。 解决方案:通过分别将EGR阀26的开度按预定的开度(例如,满量程)的预定步数分别增加,重复计算发动机转速变化(例如发动机转速的标准偏差)的处理 在设计中的关闭位置),直到在怠速运转中EGR阀26的开度变为规定值以上为止,通过将EGR阀26的开度分别从 预先确定的开口,直到EGR阀26的开度变为规定值以下为止。 因此,当增加和减少EGR阀26的开度时,将EGR阀26的开度的最大值在发动机转速变化中变为最小值被学习为完全关闭位置。 或者,也可以将发动机旋转变化中的EGR阀26的开度的最大值和最小值的平均值变为最小值,作为全闭合位置。 版权所有(C)2013,JPO&INPIT