Exhaust gas recirculation device
Abstract
Abstract Translated from Japanese (57)【要約】 【課題】 排気ガス環流効果を維持しつつ、環流通路の 詰まりを未然に防止する排気ガス環流装置を提供するこ と。 【解決手段】 エンジン2から排出される排気ガスをエ ンジン2の吸気側へ環流させる環流通路7と、その環流 通路7の途中に設けられ環流通路7を流通する排気ガス を冷却するEGRクーラ8とを備え、EGRクーラ8の 冷却性能が低下したときに排気ガスを所定の温度まで上 昇させる。排気ガスの温度を上昇させて環流通路7の内 壁に付着する煤などを燃焼させて、EGRクーラ8の冷 却性能の低下及び環流通路7の詰まりを防止する。 (57) [Problem] To provide an exhaust gas recirculation device that prevents clogging of a recirculation passage while maintaining an exhaust gas recirculation effect. SOLUTION: A recirculation passage 7 for recirculating exhaust gas discharged from the engine 2 to the intake side of the engine 2, an EGR cooler 8 provided in the middle of the recirculation passage 7 for cooling the exhaust gas flowing through the recirculation passage 7 are provided. The exhaust gas is raised to a predetermined temperature when the cooling performance of the EGR cooler 8 decreases. The temperature of the exhaust gas is increased to burn soot and the like adhering to the inner wall of the recirculation passage 7, thereby preventing the cooling performance of the EGR cooler 8 from lowering and preventing the recirculation passage 7 from being clogged.
Inventors
- 👤 Toshisuke Toshioka
- 👤 俊祐 利岡
Bibliographic Details
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