Abstract:
The compression ratio of an internal combustion engine is an important control
parameter for effective engine design. A project study to simulate the effect of
variable compression ratio on the performance of an engine. In this project the various
performance parameters were studied at various compression ratios. The study carried
out using a simulation software Diesel RK version 4.3.0.189 it is internal combustion
engine simulation software, and ECM titanium mapping software version 1.61, to get
the engine maps from the control unit file for Volkswagen Golf 2.0 TFSI and engine
control module number (1K0907115K).
The performance parameters considered for the simulation are Brake Torque, Engine
power, indicated mean effective pressure (IMEP), Brake mean effective pressure
(BMEP), Specific fuel consumption (SFC), Cylinder Pressure and Cylinder
Temperature. The graphs for these parameters against the engine speed at different
compression ratios.
An increase in compression ratio cause increases in Indicated mean effective pressure
(IMEP), Brake mean effective pressure (BMEP), Brake torque, piston engine power,
cylinder pressure and cylinder temperature and reduction in the specific fuel
consumption
