COMPUTER SIMULATION OF DIESEL ENGINE PERFORMANCE

Abstract

ABSTRACT Performance and efficiency of internal combustion engines, such as diesel engines, may be described by engine performance maps. These maps show lines of equal specific fuel consumption as a function of engine speed and torque, i.e., they display the ratio of fuel, chemical energy, input and mechanical energy output at any point of operation. In the following, functional techniques are introduced to describe engine performance. The proposed functions are universally applicable to all engines, but their coefficients are specific to the engine type. Methods to determinate these coefficients either by approximation using a great number of measured points of performance or by approximation using nine points of performance are explained.