| 摘要 |
PROBLEM TO BE SOLVED: To appropriately carry out feed-back control for an exhaust gas recirculation control valve for reducing particulate components including black smoke and unburnt fuel contained in exhaust gas, and NOx components, without overshooting and hunting. SOLUTION: In an exhaust recirculation control device in a cylinder-injection type engine incorporating an exhaust recirculation control means 26 detecting a value relating to an exhaust gas recirculation volume, for feed-back controlling the operating value of an exhaust recirculation control valve so that the detected value becomes a desired value corresponding to an operating condition of the engine, the exhaust recirculation control means 26 is provided with a feed-back control part 30 having an operation speed control part which carries out control, the smaller the opening area of the exhaust recirculation control valve, the lower the operating speed of the exhaust recirculation valve. |
