{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A method to reduce engine noise in a multi-cylinder direct injection internal combustion engine 22. The internal combustion engine includes a high pressure fuel pump 24 having both an inlet valve 30 fluidly connected to a fuel source and an outlet valve 36 typically connected to a pressurized fuel…",
  "path": "/patents/997844",
  "publishedAt": "2012-09-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02D41/0097",
    "HITACHI LTD [JP]"
  ],
  "textContent": "A method to reduce engine noise in a multi-cylinder direct injection internal combustion engine 22. The internal combustion engine includes a high pressure fuel pump 24 having both an inlet valve 30 fluidly connected to a fuel source and an outlet valve 36 typically connected to a pressurized fuel rail 34. In order to reduce engine noise, especially at low engine speeds, the timing of the opening of either the fuel pump inlet valve 30 or fuel pump outlet valve 36 is varied so that it coincides with the opening of the fuel injectors 38.",
  "title": "Method and apparatus to reduce engine noise in a direct injection engine"
}