| 摘要 |
PROBLEM TO BE SOLVED: To obtain a constitution which increases a flow rate of an EGR gas at a low cost while suppressing an influence on exhaust pulsation.SOLUTION: An engine comprises: an air feed part 116 having an air feed pipe 132, and a plurality of branches 134a which are branched from the air feed pipe, and connected to a plurality of cylinders 104, and introducing fresh air into the plurality of cylinders; an exhaust part 120 which has a plurality of pre-aggregation passages 136a connected to the plurality of cylinders, and an aggregated passage 136b in which the plurality of pre-aggregation passages are aggregated, and to which exhaust gases from the plurality of cylinders are introduced; and reflux passages 124 which are connected one pre-aggregation passage out of the plurality of pre-aggregation passages, and reflux the exhaust gases which are exhausted to one pre-aggregation passage from the cylinder to the air feed pipe. An EGR cylinder 104a which exhausts the exhaust gases to the pre-aggregation passages which are connected with the reflux passages is larger than the other cylinder in capacity.SELECTED DRAWING: Figure 2 |
