{
  "$type": "site.standard.document",
  "description": "An apparatus of diagnosing a blow-by gas recirculation system includes: a head portion of an engine forming a combustion chamber, a head cover provided above the head portion, a crankcase formed below the combustion chamber, an intake line through which intake air flows into the combustion chamber…",
  "path": "/patents/1375777",
  "publishedAt": "2025-06-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F01M11/10",
    "HYUNDAI MOTOR COMPANY"
  ],
  "textContent": "An apparatus of diagnosing a blow-by gas recirculation system includes: a head portion of an engine forming a combustion chamber, a head cover provided above the head portion, a crankcase formed below the combustion chamber, an intake line through which intake air flows into the combustion chamber, a breather hose connecting the crankcase and the intake line upstream of a compressor mounted on the intake line, a PCV hose connecting the crankcase and a surge tank, and a controller. The controller is configured to preliminarily determine whether the breather hose is abnormal based on atmospheric pressure, a crankcase model pressure determined from an intake air flow rate flowing in through a throttle valve, and a crankcase internal pressure. The controller is configured to form negative pressure in the crankcase when it is preliminarily determined that the breather hose is abnormal, and finally determine whether the breather hose is abnormal.",
  "title": "APPARATUS AND METHOD OF DIAGNOSING A BLOW-BY GAS RECIRCULATION SYSTEM"
}