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
Fine grain voltage scaling of back biasing
Display screen with graphical user interface
Printing apparatus
Use of natriuretic peptide for treating heart failure
Content distribution system, mobile communication terminal device, and computer readable medium
Display device and projector
  Randomly Featured Patents
Method, system and apparatus for chromatic dispersion compensation utilizing a gires-tournois interferometer
Configuration for the pressure supply to an automatic selector device of a change-speed gearbox
Escalator step
Polysilicon thin film transistor structure
Method for forming superconductor material on a tape substrate
Method and apparatus for common mode control
Plurality of distinct multiplexers that operate as a single multiplexer
Grip for a cinecamera
Tracking error detecting device for disc-type video signal recorder/reproducer
Light water moderation type nuclear reactor