{
  "$type": "site.standard.document",
  "description": "An ignition unit (4) of an internal combustion engine (1) is equipped with an ignition coil (21) including a primary coil (21a) and a secondary coil (21b), an igniter (22), and a secondary current detection resistor (23). By means of the secondary current detection resistor (23), an engine…",
  "path": "/patents/933146",
  "publishedAt": "2016-12-28T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D35/024",
    "NISSAN MOTOR [JP]"
  ],
  "textContent": "An ignition unit (4) of an internal combustion engine (1) is equipped with an ignition coil (21) including a primary coil (21a) and a secondary coil (21b), an igniter (22), and a secondary current detection resistor (23). By means of the secondary current detection resistor (23), an engine controller (10) detects a current value (Idis) of the secondary current immediately after completion of capacitive discharge. The current value (Idis) is correlated with a gas pressure between electrodes at ignition timing, and thus an in-cylinder pressure (Pign) can be estimated from the current value (Idis). An amount of time-dependent change (µ) in compression ratio, caused by accumulation of deposits, is calculated based on the in-cylinder pressure (Pign) at the ignition timing.",
  "title": "IGNITION DEVICE AND IGNITION METHOD FOR INTERNAL COMBUSTION ENGINE"
}