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
Transferring storage devices within storage device testing systems
Hydrolases, nucleic acids encoding them and methods for making and using them
Carbon blacks having low PAH amounts and methods of making same
Generator with a segmented stator
Liquid crystal display and method of driving the same
Para-xylylene based microfilm elution devices
Establishing a social network
  Randomly Featured Patents
Methods of forming hemispherical grained silicon on a template on a semiconductor work object
Configurable output buffer and method to provide differential drive
Nursing bottle with indented sides and vent tube
Apparatus and method for measuring components of a solute stream
Personal care devices including moisture-activated compositions
Durable hydrophilic fiber and fabric using the same
OFDMA with adaptive subcarrier-cluster configuration and selective loading
Arrangement for vehicle body structure
Heat exchanger with turbulated louvered fin, manufacturing apparatus and method
Electromagnetic type reciprocating pump