| 摘要 |
PURPOSE:To reduce the NOx exhaust quantity furthermore by increase- correcting the recirculation quantity of exhaust gas when the temperature of the exhaust gas the recirculation of which does not give influences onto the combustion faculty and stability of an engine is high. CONSTITUTION:In an exhaust gas recirculation device, a portion of the exhaust gas in an exhaust passage A is allowed to recirculate into an intake passage B by an exhaust recirculation means C, which is controlled by an exhaust recirculation control means D according to the engine operation state. In this case, an exhaust temperature detecting means E for detecting the temperature of the exhaust gas (or the related temperature) is installed. A recirculation quantity correcting means F corrects the exhaust gas recirculation quantity by the exhaust quantity recirculation control means D or the exhaust recirculation means C according to the detected exhaust temperature. The correction is executed so that the exhaust gas recirculation flow rate is increased when the exhaust gas temperature is higher than the standard temperature corresponding to the engine operation state.
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