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Precise fuel flow measurement with modified fluid control valve

  • US 5,895,844 A
  • Filed: 05/29/1997
  • Issued: 04/20/1999
  • Est. Priority Date: 05/29/1997
  • Status: Expired due to Fees
First Claim
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1. A system for electronically measuring an amount of effective piston stroke travel in a fuel injector while compressing and displacing fuel in a chamber therein to determine a precise amount of fuel delivered to an engine cylinder by said piston stroke travel, the system comprising:

  • a first sensor means on said injector for detecting an actual amount of piston stroke travel and generating corresponding first signal;

    a second sensor means on said injector for detecting both the onset and the completion of fuel compression by said piston stroke travel and generating corresponding second and third signals; and

    an electronic control unit coupled to said first and second sensors and having a measuring circuit for calculating effective piston stroke travel only from the onset of said fuel compression as determined by said second signal and therefore determining a precise measurement of fuel ejected on each piston stroke.

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