公开(公告)号：US07729846B2

公开(公告)日：2010-06-01

申请号：US12561883

申请日：2009-09-17

申请人： Junya Kitada ,  Shigetoshi Hirano ,  Koji Kawakita ,  Hitoshi Kamura ,  Katsuhiro Furuta

发明人： Junya Kitada ,  Shigetoshi Hirano ,  Koji Kawakita ,  Hitoshi Kamura ,  Katsuhiro Furuta

IPC分类号： F02D41/22 ,  F02D41/14

CPC分类号： F02D41/0025 ,  F02D19/0623 ,  F02D19/084 ,  F02D19/088 ,  F02D41/0032 ,  F02D41/1488 ,  F02D41/221 ,  F02D41/3809 ,  F02D2200/0612 ,  Y02T10/36 ,  Y02T10/40

摘要： A control device for an engine includes an air-fuel ratio detector detecting an air-fuel ratio of an exhaust gas of the engine. A feedback controller performs a feedback control of an amount of a fuel injection of mixed fuel including alcohol so that the air-fuel ratio detected by the air-fuel ratio detector is come close to a target air-fuel ratio, the mixed fuel supplied from a fuel feeder. A concentration estimator estimates a concentration of the alcohol in the mixed fuel based on the air-fuel ratio of the exhaust gas and a correction amount for the amount of the fuel injection controlled by the feedback control. A malfunction determiner determines that the fuel feeder has a malfunction when the correction amount is greater than or equal to a value for a period which is longer than a first period in a second period. The second period is from a first time point when the feedback controller starts to perform the feedback control.

摘要翻译： 发动机的控制装置包括检测发动机的排气的空燃比的空燃比检测器。 反馈控制器对包括醇的混合燃料的燃料喷射量进行反馈控制，使得由空燃比检测器检测的空燃比接近目标空燃比，从 燃料供给器 浓度估计器基于排气的空燃比估计混合燃料中的醇的浓度和通过反馈控制控制的燃料喷射量的校正量。 当校正量大于或等于在第二周期中长于第一周期的时间段的值时，故障确定器确定燃料供给器具有故障。 第二个时间段是反馈控制器开始执行反馈控制的第一时间点。