Fuel-vapor discharge structure in a fuel tank for engine apparatus
First Claim
Patent Images
1. A fuel-vapor discharge structure for a fuel tank comprising:
- a communication passage between an upper space of a fuel tank and outside of the fuel tank;
an extraction portion disposed at a bottom of the fuel tank, wherein a portion of the communication passage includes a conduit having an upper portion terminating at an open end of the conduit and a lower portion extending into the extraction portion so as to support the entire conduit within the fuel tank in an erect configuration;
an air induction system, wherein a distal end portion of the communication passage disposed outside the fuel tank is in flow communication with the air induction system so that fuel-vapor from the upper space enters the engine; and
a one-way valve disposed in the fuel tank and configured to allow fuel-vapor to pass from the conduit to the air induction system only when a fuel vapor pressure of the fuel vapor exceeds a predetermined pressure.
2 Assignments
0 Petitions
Accused Products
Abstract
A fuel tank has a fuel-vapor discharge structure in which the piping connecting to external equipment is not obtrusive. The fuel-vapor discharge structure allows the passage of fuel vapor between an upper space in the fuel tank and an induction system. The communication passage can be formed by a communication tube arranged vertically within the interior of the fuel tank and a connecting tube located outside the fuel tank. A lower portion of the fuel tank includes a one-way valve which allows fuel vapor to flow from the fuel tank to the induction system.
9 Citations
29 Claims
-
1. A fuel-vapor discharge structure for a fuel tank comprising:
-
a communication passage between an upper space of a fuel tank and outside of the fuel tank; an extraction portion disposed at a bottom of the fuel tank, wherein a portion of the communication passage includes a conduit having an upper portion terminating at an open end of the conduit and a lower portion extending into the extraction portion so as to support the entire conduit within the fuel tank in an erect configuration; an air induction system, wherein a distal end portion of the communication passage disposed outside the fuel tank is in flow communication with the air induction system so that fuel-vapor from the upper space enters the engine; and a one-way valve disposed in the fuel tank and configured to allow fuel-vapor to pass from the conduit to the air induction system only when a fuel vapor pressure of the fuel vapor exceeds a predetermined pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A fuel-vapor discharge system for a fuel tank comprising:
-
a communication passage between an inside and outside of a fuel tank, a portion of the communication passage being disposed within the fuel tank, the communication passage comprising a conduit having an upper portion terminating at an open end disposed in an upper portion of the fuel tank; an extraction portion being disposed at the bottom of the fuel tank, wherein the conduit further comprises a lower portion extending into the extraction portion; a one-way check valve disposed within the lower portion of the communication passage and configured to allow fuel vapor to pass only when a fuel vapor pressure of the fuel vapor exceeds a predetermined pressure; and an induction system in flow communication with the communication passage. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 27)
-
-
22. A fuel tank for an engine generator comprising:
-
a lower surface; an internal upper region; a member having at least a portion disposed within the fuel tank, the portion including an internal passageway that extends between the upper region and the lower surface; an extraction portion disposed on the lower surface and in flow communication with internal passageway, the portion of the member extending into the extraction portion so as to support the entire portion within the fuel tank and wherein a size of the extraction portion is configured to allow the portion of the member to be inserted into the fuel tank through the extraction portion; and an air induction system in flow communication with the internal passageway so that fuel-vapor from the internal upper region enters the engine generator. - View Dependent Claims (23, 24, 25, 26, 28, 29)
-
Specification