Internal combustion engine with supercharger

摘要

An internal combustion engine with a supercharger, of a reciprocating piston type, having a supercharger disposed in an intake passage, wherein the relation of a pressure ratio ( gamma =P/Po) of pressure (P) on the discharge side of the supercharger to atmospheric pressure (Po) at the time of high load with a geometric compression ratio ( epsilon ) of the engine and a cylinder bore size (B), represented by millimeter, satisfies the following formula: gamma >/=-0.29 epsilon +6.0-0.022B.