| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve exhaust gas recirculation at a high EGR rate while performing supercharging by a supercharging system, and to secure the intake amount required for combustion without giving rise to an extreme increase in exhaust pressure. <P>SOLUTION: A pressure accumulation type EGR system 17 to be applied to an engine 1 including a supercharging system comprises: an EGR port 21 dedicated to exhaust gas recirculation, provided at each cylinder 8 of the engine 1 separately from an intake port; an EGR rail 22 extended in an arrangement direction of the respective cylinders 8 of the engine 1 and connected to the EGR port 21 via an EGR valve 21v to accumulate the pressure of EGR gas 11'; an EGR line 23 extracting some of EGR gas 11 in the middle of the exhaust pipe 13 as the EGR gas 11' and recirculating it to the EGR rail 22; and an EGR pump 24 provided in the middle of the EGR line 23 and boosting the pressure of the EGR gas 11' to introduce it into the EGR rail 22. <P>COPYRIGHT: (C)2013,JPO&INPIT |
