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Apparatus and method for evaluating fuel injectors

  • US 7,197,918 B2
  • Filed: 08/14/2003
  • Issued: 04/03/2007
  • Est. Priority Date: 08/14/2003
  • Status: Expired due to Term
First Claim
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1. A fuel injector for an internal combustion engine comprising:

  • a nozzle disposed at a distal end of the fuel injector and having at least one discharge port;

    a needle slideably mounted inside the fuel injector and the nozzle;

    a fluid cavity disposed in the nozzle;

    a pressure sensor arranged to measure pressure in the fluid cavity; and

    an orifice disposed in the needle and disposed along an outer boundary of the fluid cavity, wherein the pressure sensor is disposed in the orifice.

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