Study of Gas Flow in Exhaust System of Actual Turbo-charged 4-cycle Diesel Engines : 1st Report, Theoretical Analysis on Exhaust System and its Application to Design Problem)

Abstract

The paper describes a practical and precise analysis which concerns the matching between diesel engine and turbo-supercharger. The exhaust piping system of an actual turbocharged 4-cycle 6-cylinder diesel engine including engine cylinders and a turbine is calculated by applying the method of characteristics under the boundary conditions as exactly as possible. Since the computation at the pipe junction is extremely complex and tedious, a practical and reasonable simplification has been proposed, which accomplishes a considerable shortening of the computer time. The results of the calculation have generally agreed with the experimental measurements. The factors which influence the magnitude of the available exhaust gas energy are examined and the optimum dimensions of exhaust piping systems for the maximum energy utilization are suggested.