| 摘要 |
<p>To provide an abnormality-determining device for an idling control system, which is capable of determining abnormality of the idling control system that controls an idling operation of an internal combustion engine with high accuracy. The abnormality-determining device 1 for the idling control system 6, 7, 7a, and 8 detects combustion state parameters rEGR, TW, and PA indicative of a combustion state of the engine 3, and/or load parameters VEL, TA, TW, and PO indicative of load on the engine 3, determines a threshold value qJUD for determining abnormality of the idling control system 6, 7, 7a, and 8 based on the combustion state parameters rEGR, TW, and PA, and/or the load parameters VEL, TA, TW, and PO, which are detected when the engine 3 is in the predetermined idling operation state (steps 5 to 13), and determines abnormality of the idling control system 6, 7, 7a, and 8 based on a result of comparison between the acquired fuel supply amount QOUT and the determined threshold value qJUD (steps 17, 21, and 25).</p> |
