COMPARATIVE DESIGN ASSESSMENT OF INDICATORS OF WORKING CYCLE DIESEL ENGINE

Abstract

The review of modern ways of the organization of the working process of diesel engines and methods for modeling the indicators of ICE. The use of modern methods of organizing the working cycle can improve the fuel economy of ICE and reduce the level of toxicity of exhaust gases. The paper discusses the results of comparative numerical simulation of the duty cycle of diesel engine 16 FT 26/27 when operating at typical operating conditions (idling, 30% of rated power and nominal mode).With the use of numerical methods, considered variants in the standard version (when the engine is running on a Diesel cycle) and upgraded (HCCI engine). The use of numerical methods for studying the ICE work processes allows obtaining information on local and averaged characteristics of the working cycle and their variation in the angle of rotation of the crankshaft. The work shows that the HCCI engine has a decrease in the level of nitrogen oxide emissions, on average by 15-20%, mass emission of soot (solid particles) on average by 18-22%, which is achieved by homogenizing the fuel-air mixture, reducing the maximum local flame temperatures and increasing the completeness of combustion.