{
  "$type": "site.standard.document",
  "description": "The method involves constructing a wave equation model of a cylinder-head based on a physical model describing propagation of waves in a solid medium. Coefficients of a Fourier decomposition of a vibration signal from a cylinder pressure sensor/an accelerometric sensor is determined in real time by…",
  "path": "/patents/995355",
  "publishedAt": "2012-12-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02B77/085",
    "IFP ENERGIES NOUVELLES [FR]"
  ],
  "textContent": "The method involves constructing a wave equation model of a cylinder-head based on a physical model describing propagation of waves in a solid medium. Coefficients of a Fourier decomposition of a vibration signal from a cylinder pressure sensor/an accelerometric sensor is determined in real time by inverting dynamics of the equation model by using an adaptive non-linear estimator. Energy contained in the signal is calculated by summing squares of the coefficients. A parameter correlated with knocking intensity equal to a square root of a maximum of the energy is determined (CAL) in real time.",
  "title": "Method for estimating the pinking intensity of an internal combustion engine by inverting a wave equation"
}