MULTI-CYLINDER ENGINE WITH TURBO TYPE SUPERCHARGER

PROBLEM TO BE SOLVED: To increase supercharging efficiency at a time of supplying intake air to all cylinders of cylinders on one side and cylinders on another side and improve output by shortening length of a supercharging exhaust passage from an exhaust valve of one cylinder to a turbo type super charger in all cylinders on one side connected to the supercharging exhaust passage have the turbo type supercharger installed therein in a multi-cylinder engine with a turbo type supercharger. SOLUTION: In No.2 cylinder 3b and No.3 cylinder 3c connected to a turbine 32 of the supercharger 13, length of a route in which exhaust gas flows from the exhaust valve 6 of one cylinder to the turbine 32 of the supercharger 13 is established short as 100 mm or less. Consequently, charge of the supercharger 13 by No.2 cylinder 3b and No. 3 cylinder 3c can be increased. Output of the engine 1 can be improved and fuel economy can be improved by increasing supercharging efficiency to all cylinders 3. COPYRIGHT: (C)2006,JPO&NCIPI