Resources Contact Us Home
Low noise fuel injection pump

Image Number 6 for United States Patent #7610902.

A fuel pump assembly has a bushing defining a pumping chamber, a plunger, a cam follower piece, and a compliance device for absorbing noise by increasing either or both of a hydraulic and/or a mechanical compliance of the fuel pump assembly. The compliance device may includes a spring washer or a press-fit spring. The pump bushing and/or plunger may include a cavity as the compliance device for increasing dead volume, the cavity being in fluid communication with the pumping chamber via an orifice. A deflectable or movable mechanism is positioned within a cavity for increasing dead volume, and a solenoid varies a diameter of the orifice. The moveable mechanism includes a poppet valve having a switching pressure related to engine speed. A vehicle includes an engine, transmission, fuel rail, and a fuel pump assembly configured with at least one compliance device for absorbing a hydraulic noise component.

  Recently Added Patents
Method and apparatus for filter-less class D audio amplifier EMI reduction
Generating agricultural information products using remote sensing
Fragrance compounds
Mobile communication apparatus
Bessel beam plane illumination microscope
Dual-leadframe multi-chip package and method of manufacture
Internal wiring structure of semiconductor device
  Randomly Featured Patents
Clothes dryer
Speaker for automotive vehicle audio system having a vehicle panel serving as sound-amplifying medium
Fishing rod and beverage holder
Self-pulsing multi-section laser
Locomotive safety device
Process for preparation of imipenem
Decision apparatus for machining steps of numerical control information generating function
Generating apparatus
Multi-channel cross-talk interference reduction circuit using modulation-multiplying-demodulation correlator
Multi-core data processor