초록 ▼

A multi-function pressure relief valve having a moveable seat and a needle is mounted on a fuel vapor separator. The needle is connected to a float assembly for opening and closing the pressure relief valve for venting an internal chamber of the fuel vapor separator. The moveable seat is biased to e

A multi-function pressure relief valve having a moveable seat and a needle is mounted on a fuel vapor separator. The needle is connected to a float assembly for opening and closing the pressure relief valve for venting an internal chamber of the fuel vapor separator. The moveable seat is biased to engage the needle for relieving excess pressure when vapor pressure in the internal chamber exceeds a biasing force on the movable seat. The valve opens in response to at least one of (1) changing fluid level in the fuel vapor separator, and (2) excess vapor pressure within the vapor fuel separator. During operation, the valve vents an internal chamber of the fuel vapor separator by disengaging the needle from the movable seat using a float attached to the needle. The valve closes when the float reaches a desired position to pressurize the internal chamber by engaging the needle to the movable seat. The valve also releases excess vapor pressure in the internal chamber when the pressure in the internal chamber exceeds a biasing force on the movable seat and disengages the movable seat from the needle.

대표청구항 ▼

1. A pressure relief valve assembly comprising:(A) a valve body having an inlet port, an outlet port, and a shoulder extending inwardly within the valve body; (B) a movable seat having a length longer than that of the valve body and which is at least partially disposed in and movable in the valve bo

1. A pressure relief valve assembly comprising:(A) a valve body having an inlet port, an outlet port, and a shoulder extending inwardly within the valve body; (B) a movable seat having a length longer than that of the valve body and which is at least partially disposed in and movable in the valve body, the movable seat having a shoulder separating an upper portion from a lower portion which engages against the shoulder of the valve body to define a lower stop for the movable seat; and (C) a movable needle movably disposed in the movable seat, the movable seat and the movable needle selectively engaging with and disengaging from one another within the valve body.