Back to results
US 6,672,291 B2Granted
Purge valve with evaluation port
AssigneeSiemens Automotive Corporation
InventorsDavid W. Balsdon, Alfred Schneider
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSiemens Automotive Corporation
InventorsDavid W. Balsdon, Alfred Schneider
Estimating the term…
A vapor purge system that permits evaluation of the system with a minimum number of hoses and connections, and without the use of additional components. The system includes a valve having first and second ports in communication with a first chamber and a third port in communication with a second chamber, the first and second chambers being defined by a metering member that divides an internal volume of a housing. A first conduit connects a diagnostic member having first and second operative states with the first chamber, the connection being made through the second port. The first operative state prohibits communication with an exterior of the valve, and the second operative state permits communication with the exterior. The diagnostic member provides the ability to reliably measure flow through the valve. The system can use three (3) hoses including five (5) connections from a vapor supply port connected with the first port to the third port operatively connected with a manifold.
A vapor purge system comprising:
A flow evaluation assembly, comprising:
A method of evaluating a vapor purge system having a vapor collection arrangement and a valve that includes a housing defining an internal volume, an electromagnetic coil disposed in the housing, the electromagnetic coil defining a hollow having a first end and a second end disposed along an axis, a metering member disposed in the housing to divide the volume into first and second chambers, a movable member passing through the first end and the second end of the hollow, a first port in communication with the first chamber, a second port in communication with the first chamber, and a third port in communication with the second chamber, a diagnostic member in communication with the second port, the diagnostic member having a first operative state that prohibits communication with an exterior of the valve and a second operative state that permits communication with the exterior, and a conduit providing a flow path from the second port to the diagnostic member, the method comprising:
Dependencies are inferred from the claim text.