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Fuel injector with valve bounce inhibiting means

  • US 5,271,565 A
  • Filed: 12/18/1992
  • Issued: 12/21/1993
  • Est. Priority Date: 12/18/1992
  • Status: Expired due to Fees
First Claim
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1. An improved fuel injector for an internal combustion engine, comprising:

  • a housing enclosure means with an outlet aperture at one end for delivering fuel to the engine;

    a valve seating surface adjacent the aperture;

    a valve element with an end portion adapted to engage the seating surface to block fuel flow to the aperture when the valve element is in a closed operative position;

    the valve element being supported to permit opening movement away from the seating surface which allows fuel to flow to the outlet aperture;

    a spring yieldably urging the valve element toward the closed position and its end portion against the seating surface, whereby contact of end portion with the valve seating surface associated with a closing movement of the valve element generates an opening force on the valve element tending to cause the valve to rebound from the seating surface;

    a pair of closely spaced surfaces upstream of the outlet aperture generally parallel to each other and extending normal to the direction of valve movement, a first of said pair of surfaces associated with the housing and being stationary, the second of said pair of surfaces being carried by the movable valve element;

    the first and second surfaces being positioned in opposing and closely spaced relation to one another when the valve element is in its closed operative position whereby a rebounding movement of the valve element away from the seating surface instantly creates a reduced fluid pressure condition between the closely spaced surfaces and a resultant force is produced on the valve element in opposition to a rebounding force thus inhibiting rebound movements.

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