| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas recirculation amount adjusting device, capable of reducing the possibility of deterioration of a catalyst causing an operation failure of an EGR valve. <P>SOLUTION: The EGR gas recirculation amount-limiting device 30 includes: a catalyst deterioration level calculation unit 31 which calculates a catalyst deterioration level actual measurement value Ddm based on detection results from an air-fuel ratio sensor 21 and an oxygen sensor 22; a catalyst deterioration level determination unit 32 which determines whether the catalyst deterioration level actual measurement value Ddm is equal to or greater than a first predetermined value; and an EGR gas recirculation amount limiting instruction unit 33 which controls the EGR valve 17 to limit the EGR gas recirculation amount when the catalyst deterioration level determination unit 32 determines that the catalyst deterioration level actual measurement value Ddm is equal to or greater than the first predetermined value. <P>COPYRIGHT: (C)2013,JPO&INPIT |
