Modelling and simulation of a 4-stroke diesel engine

Abstract

Modelling and simulation play an important role in the research and
development of technological products, especially in the development of
automobile and military vehicles. Internal combustion engines also play an
important role and directly affect the movement of vehicles. Nonetheless,
the operation of these engines are harsh and complicated, thus the research
in developing and optimizing their operations faces many challenges. The
use of modelling methods can assist in solving the aforementioned
problems. This research focuses on the modelling of the internal combustion
engine’s operations, particularly to determine the kinetic and dynamics of
the engine’s the main components, such as a rod, crankshaft and piston. To
conduct this research, the thermodynamic process was simulated to
calculate the in-cylinder pressure distribution. In addition, this research also
modelled the friction forces for calculating the test engine’s net force. The
results showed that the net force changes according to the crank angle and
reaches to the maximum values near the top dead center (TDC). As a result,
it is necessary to analyze the stress of the crankshaft, rod and piston in these
areas. The research results serve as the foundation to design the simulation
models for vehicles, as well as to calculate and to test the strength of
engines’ components during operation.