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EXCESS AIR FACTOR DETECTING DEVICE AND EXCESS AIR FACTOR CONTROLLING DEVICE FOR AN ENGINE
EXCESS AIR FACTOR DETECTING DEVICE AND EXCESS AIR FACTOR CONTROLLING DEVICE FOR AN ENGINE
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机译：发动机的超空气因素检测装置和超空气因素控制装置
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摘要
An engine having an exhaust gas recirculation apparatus is provided with an apparatus for detecting excess air ratio and a control device using the same, wherein the excess air ratio of the mixer supplied during exhaust gas recirculation is repeatedly detected based on the operating state of the engine. The intake pressure of the engine is detected, and based on the detected intake pressure, the exhaust gas reflux amount is estimated, and the equivalent intake air freshness amount of the engine is estimated by the equivalent intake air freshness estimating means, and the fuel supply amount and the estimated equivalent intake air flow amount are estimated. The excess air ratio of the engine is estimated, and the estimated excess air ratio is stored in the storage means, at least the estimated exhaust gas reflux amount estimated by the equivalent suction fresh air amount estimating means, and stored in the storage means, and a predetermined number of times. The reflux amount of the exhaust gas is estimated on the basis of the excess air ratio estimated before, and the amount of fuel supply and / or the exhaust gas circulation amount is adjusted to the target value by adjusting the fuel supply amount and / or the exhaust gas circulation amount using the estimated air excess rate.
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