Closed tank system

摘要

In at least some implementations, a fuel tank includes a tank body defining a chamber adapted to receive liquid fuel therein, a reinforcement for the tank body to permit the pressure within the chamber to exceed the vapor pressure of a fuel to be received within the chamber, and an inlet to the tank body through which fuel is added to the chamber. The inlet is configured to mate with a refueling nozzle through which fuel is added to the chamber to permit refueling the tank and maintaining the pressure in the chamber above atmospheric pressure.

主权项

1. A fuel tank, comprising:
a tank body defining a chamber adapted to receive liquid fuel therein, and a reinforcement for the tank body to permit the pressure within the chamber to exceed a fuel vapor pressure of at least 35 kPa of a fuel to be received within the chamber; an inlet to the tank body through which fuel is added to the chamber, the inlet configured to mate with a refueling nozzle through which fuel is added to the chamber to permit refueling the tank and maintaining the pressure in the chamber above atmospheric pressure while liquid fuel is added to the chamber; a fill pipe that extends from the tank body and communicates with the chamber; wherein the inlet is defined in the fill pipe; and a conduit associated with the fill pipe and adapted to provide a fluid flow separate from the liquid fuel flow in the fill pipe during a refueling event; wherein the chamber is closed to the outlet of fuel vapor from the chamber to a pressure of at least 35 kPa during normal use of the fuel tank when liquid fuel is not being added to the chamber of the tank body.