Fuel tank structure
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsTouru Suda, Takayuki Usui, Taku Masaki
Life of this patent
Estimating the term…
Abstract
A main suction, that is a portion of a fuel feed-out pipe, and a bent portion, that is a lowermost portion formed at a return pipe, are both disposed within a fuel tank, positioned lower than a lowest liquid surface within a reserve cup, and can always be maintained in a state of existing within fuel. A fuel expelling port of a jet pump is positioned higher than a highest liquid surface at the reserve cup, and is always positioned higher than fuel within the reserve cup. As a result, a fuel tank structure in which suppression of flowing-out of fuel from the return pipe and the like, an improvement in the fuel transferring performance of the jet pump, and suppression of backward flowing of fuel through a transfer pipe, can all be realized is obtained.
Claims10
A fuel tank structure comprising:
- a fuel accommodating portion that accommodates fuel;
- a fuel feed-out pipe having, within the fuel accommodating portion, a fuel suction
- opening for feeding fuel from the fuel accommodating portion out to an exterior;
- a fuel flow-in pipe communicating with the fuel feed-out pipe, and causing fuel to flow into the fuel accommodating portion;
- a jet pump disposed within the fuel accommodating portion and to which a fuel discharge opening of the fuel flow-in pipe is connected, the jet pump able to transfer fuel from a region other than the fuel flow-in pipe by utilizing negative pressure of fuel that flows-in from the fuel flow-in pipe;
- and
- a fuel transfer pipe, connected to the jet pump, for transferring fuel from a region other than the fuel flow-in pipe by the negative pressure,
- wherein a portion of the fuel feed-out pipe and a portion of the fuel flow-in pipe are positioned lower than a lowest liquid surface of fuel that is set at the fuel accommodating portion, and a fuel expelling port of the jet pump is positioned at a height that is greater than or equal to a highest liquid surface of fuel that is set at the fuel accommodating portion.
A fuel tank structure comprising:
- a fuel accommodating portion that accommodates fuel;
- a fuel feed-out pipe having, within the fuel accommodating portion, a fuel suction opening for feeding fuel from the fuel accommodating portion out to an exterior;
- a fuel flow-in pipe communicating with the fuel feed-out pipe, and causing fuel to flow into the fuel accommodating portion;
- a jet pump disposed within the fuel accommodating portion and to which a fuel discharge opening of the fuel flow-in pipe is connected, the jet pump able to transfer fuel from a region other than the fuel flow-in pipe by utilizing negative pressure of fuel that flows-in from the fuel flow-in pipe;
- and
- a fuel transfer pipe, connected to the jet pump, for transferring fuel from a region other than the fuel flow-in pipe by the negative pressure,
- wherein a portion of the fuel feed-out pipe and a portion of the fuel flow-in pipe are positioned lower than a lowest liquid surface of fuel that is set at the fuel accommodating portion, and a fuel expelling port of the jet pump is positioned in a vicinity of a highest liquid surface of fuel that is set at the fuel accommodating portion.
Dependencies are inferred from the claim text.