INTERNAL COMBUSTION ENGINE WITH SUPERCHARGER

摘要

A bridge passage (41) is connected to the middle of the joining passage (23AD) and to the middle of the joining passage (23BC). The joining passage (23AD) communicates with cylinders (11A, 11 D) and the joining passage (23BC) communicates with cylinders (11 B, 11 C). A first opening and closing valve (V1) is provided in the middle of the bridge passage (41). A heat exchanger (43) is provided in the middle of the EGR passage (42) that connects the bridge passage (41) with the intake passage (17). A second opening and closing valve (V2) is provided downstream of the heat exchanger (43) in the EGR passage (42) and a third opening and closing valve (V3) is provided upstream of the heat exchanger (43) in the EGR passage (42). The control computer (C) controls opening and closing of the first opening and closing valve (V1), the second opening and closing valve (V2), and the third opening and closing valve (V3) depending on the rate of revolution of the engine and engine load. Thus, an exhaust pressure smaller than the strength against exhaust pressure and a smaller passage sectional area of a bridge passage are achieved.