GM LS1 Engine on test stand connected to dynamometer

GM LS1 Engine on test stand connected to dynamometer

INTERNAL COMBUSTION ENGINE MODELING

Over the course of the quarter, the project for my internal combustion engines class was to code a 0-dimensional, crank-angle-resolved simulation of a single piston in a spark-ignition engine. We used a plug-in called Cantera to solve the thermodynamics and chemical kinetics.

Features

The code was able to simulate the following:

  • Variable air/fuel ratio
  • Mass flow rate through valves
  • Variable valve lift (VVL)
  • Variable valve timing (VVT)
  • Gradual combustion using the Wiebe function and chemical kinetics
  • Intake/exhaust manifold back-flow
  • Steady-state convergence between cycles
  • Exhaust gas concentrations

Results

The results were outputted in the form of plots

P-V diagram for the engine cycle. The large lower loop indicates that it is having difficulty breathing because of its fast RPM.

Exhaust gas concentrations

Various parameters throughout the cycle. The red line separating indicates the burned mass and the unburned mass.