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
System for encrypting and decrypting a plaintext message with authentication
Combined imaging and radiation therapy
Display screen with graphical user interface
Treatment of diabetes with milk protein hydrolysate
Toner cartridge and image forming apparatus including the same
Adhesive structure of optical device, adhesion method, and optical pickup device
Method and system for security authentication of radio frequency identification
  Randomly Featured Patents
Top break valve device and system
Lamp shade
Method for recycling used-up plastic products and washing process of crushed plastic and apparatus therefor
Arrangement for defining the carbon content of ash
Railway switch stand having slide block actuator and two independent operating mechanisms
Arrangement of a motor on a support winch
Rechargeable battery
Semiconductor memory having internal test circuit
Display with windowing capability by addressing
Gas turbine stator vane seal