Crankcase Ventilation System

{
  "id": "MLC-T-ENV-006866",
  "term": "Crankcase Ventilation System",
  "field": "Environment",
  "definition": "Process of venting or removing blow-by from the void spaces of an internal combustion engine outside of the combustion cylinders to prevent excessive pressure build-up within the engine. This does not include ingestive systems that vent blow-by into the engine where it is returned to the combustion process ( e.g., closed crankcase ventilation system, closed breather system) or if the vent blow-by is routed to another closed vent system.",
  "references": [
    "40 CFR 98.238 (CFR 2024)"
  ],
  "url": "https://mlchart.com/terminology/environment/crankcase-ventilation-system/"
}