Modeling of dynamic value characteristics of diesel engines

Abstract

The article considers the issue of forming dynamic operating modes of a diesel engine during vehicle acceleration. The influence of turbocharger inertia on boost pressure, acceleration dynamics, and the occurrence of such phenomena as ―turbo pit‖ and ―turbo pick-up‖ is determined. The author proposes a method for mathematical modeling of transient engine operation based on the use of an extended mathematical model of the Blitz-PRO® turbo-piston engine. A system of equations for the dynamics of the engine, turbocharger, and pneumatic actuators is presented, which allows for highly accurate determination of changes in the speed, boost pressure, and load in real operating conditions. The results obtained contribute to increasing the accuracy of transient evaluation in modern diesel engines with gas turbine supercharging and can be used in the design improvement of supercharging systems.