{
  "$type": "site.standard.document",
  "description": "The present invention relates to a method and apparatus for attenuating fuel pump noise in a direct injection internal combustion engine (22). In one proposal, the direct injection fuel nozzle is suspended from a fuel rail (32) in a fashion that avoids direct metal-to-metal contact between the…",
  "path": "/patents/1012169",
  "publishedAt": "2011-06-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F02M55/005",
    "HITACHI LTD [JP]"
  ],
  "textContent": "The present invention relates to a method and apparatus for attenuating fuel pump noise in a direct injection internal combustion engine (22). In one proposal, the direct injection fuel nozzle is suspended from a fuel rail (32) in a fashion that avoids direct metal-to-metal contact between the injector and the engine block (24). The direct injection nozzle may also be connected to the fuel rail (32) by a pair of spaced-apart seals which equalize the longitudinal pressure on the nozzle during operation. Enlarged diameter fuel reservoirs and/or a restricted orifice (96) may be provided fluidly in series between the fuel pump (36) and the direct injection nozzle in order to attenuate noise resulting from fuel pump pulsation.",
  "title": "Method and apparatus for attenuating fuel pump noise in a direct injection internal combustion chamber"
}