PIEZOELECTRICALLY-CONTROLLED FUEL DELIVERY SYSTEM

摘要

A fuel delivery system is provided for filling a fuel tank with a prescribed volume of fuel. The delivery system includes a fuel tank, a piezoelectrically-actuated fill control valve for controlling flow of fuel into the fuel tank, and a controller for controlling the closure rate of the fill control valve to accurately control the volume of fuel provided to the fuel tank. The controller receives an input corresponding to a measured volume of flow through the system and allows for closure of the fill valve at variable closure rates. The fill control valve is piezoelectrically-actuated and controlled by the controller such that each successive variable closure rate is relatively slower than the previous closure rate. In this way impact loads from shutting off the fill control valve are minimized to achieve a fill volume as close as possible to the prescribed volume.

主权项

1. A fuel delivery system for filling a fuel tank with a prescribed volume of fuel, the fuel delivery system comprising:
a fill control valve fluidly connectable to the fuel tank for controlling flow of fuel into the fuel tank, wherein the fill control valve is a piezoelectrically-actuated shutoff valve for shutting off flow into at least a portion of the fuel tank; and a controller for controlling the closure rate of the fill control valve to accurately control the volume of fuel provided to the fuel tank, wherein the controller receives an input corresponding to a measured volume of flow through the system, the controller allowing for closure of the fill control valve at a first valve closure rate and thereafter at a second relatively slower valve closure rate after a prescribed amount of fluid has passed through the fill control valve.