Services / CI Combustion

Gain insight into the underlying physics responsible for observed changes in engine behavior that are very difficult, expensive, or time consuming to explore experimentally (e.g., why is bowl A better than bowl B).
Perform analysis led design, which can lead to reduced development time and potentially a better solution. WERC has experience in lowering diesel emissions through the application of combustion bowl optimization and nozzle matching, which has been confirmed through subsequent engine testing.
- 15% to 20% NOx reduction at constant BSFC
  or 3% BSFC reduction at constant NOx
- 50% soot reduction simultaneous with NOx reduction
- Reduced soot in lube oil (extended maintenance intervals and reduced wear)

KIVA-3V code with detailed chemical kinetics, gas-jet theory spray model, and state-of-the art emissions sub-models.
Ability to model advanced combustion regimes.
- HCCI / PCCI
- Lifted flames
- Mixed mode combustion (flame propagation / auto ignition / diffusion combustion)
Advanced piston bowl geometry optimization methods. Variable curvature geometry parameterization.
- Bezier curves used to parameterize the bowl geometry
- Up to 17 parameters describe piston bowl geometry
- Typically 3 or 4 salient parameters chosen for optimization
Design of Experiments (DoE)
Genetic Algorithms

Bowl profile, nozzle specification and injection strategy.
Comparative quantitative results for performance including emissions, fuel consumption, power, etc...