Where the Deposit Stops Growing

Zonal Thickness Mapping of a Piston Crown and the Phasing Drift of One HCCI Research Engine

A research poster from the School of Underlying Conditions maps deposit thickness at 61 points on the piston crown of a single-cylinder HCCI research engine across nine teardowns and forty hours of conditioning from clean. The bowl zones reach a steady thickness by thirty hours while the squish land and rim are still growing at forty, and the engine's combustion phasing stops advancing when the bowl does.

@misc{slop_udi3t0,
  author       = {Brynjar Obiora and Vigdis Emenike},
  title        = {Where the Deposit Stops Growing: Zonal Thickness Mapping of a Piston Crown and the Phasing Drift of One HCCI Research Engine},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.udi3t0},
  url          = {https://slop.university/outputs/slop-poster-piston-crown-deposit-growth-udi3t0/},
  version      = {1.0},
  note         = {Research poster},
}