JP2006177164A5 - - Google Patents

Claims (7)

In a full tank regulating valve that is disposed in the upper space of the fuel tank and discharges the evaporation gas in the fuel tank at the time of refueling and detects the full tank level,
The case body is provided with a communication path that communicates the inside and outside of the fuel tank,
The communication passage is connected to a first communication passage portion communicating with the inside of the fuel tank, a space portion disposed above the first communication passage portion, and a first pipe extending outside the fuel tank, It is composed of a second communication passage portion that opens to the space portion,
A valve body attached to a float body is disposed in the first communication passage portion so as to be movable up and down, and a communication surface communicating with the space portion opened and closed by the valve body is provided on an upper surface of the first communication passage portion. Holes are provided,
The opening edge part to the said space part of the said 2nd communicating path part is formed in the upper end surface of the cylindrical dam protruding upward from the bottom face of the said space part, and is higher than the communicating hole opened and closed by the said valve body A full tank regulating valve, which is arranged at a position . The first communication passage portion includes a first float chamber in which a first float body having a first valve body is accommodated and a second float body in which a second float body having a second valve body is accommodated via a partition wall. It is divided into a float room,
A first communication hole communicating with the space and a first valve seat formed at a lower end of the first communication hole are provided on the upper surface of the first float chamber. A second communication hole communicating with the space portion and a second valve seat formed at a lower end of the second communication hole;
The second valve seat with which the second valve body abuts is provided at a position where the second valve body abuts upon detecting a liquid level higher than the liquid surface with which the first valve body abuts the first valve seat. As well as
The opening area of the first valve seat is larger than the opening area of the second valve seat;
The full tank regulating valve according to claim 1 , wherein the upper surface of the second valve seat is set at a position lower than the upper surface of the first valve seat . The space is provided above the first valve seat and the second valve seat of the case body so as to communicate with both valve seats,
The full tank control valve according to claim 2, wherein a concave portion communicating with the space portion is formed in an upper portion of the second valve seat . 4. The full tank control valve according to claim 3, wherein the recess is disposed at a position separated from the opening edge of the second communication passage portion across the first valve seat. . The first valve body has a first float body and a flat valve body that is provided on the first float body and can contact the first valve seat;
The first float body has a large cross-sectional area formed in the lower part thereof, a small cross-sectional area part formed between the lower part and the upper part, and a valve support part for supporting the flat plate-like valve body is provided in the upper part. The full tank control valve according to claim 2 . A third valve body that opens at a predetermined pressure or higher is disposed in the fuel tank;
The full tank regulating valve according to any one of claims 1 to 5, wherein the third valve body and the second communication passage portion are communicated with each other via the space portion.   The full tank control valve according to claim 6, wherein the third valve body and the concave portion formed in the space portion are communicated with each other through a second pipe.