TANK PRESSURE CONTROL SOLENOID WITH PASSIVE TANK VACUUM

摘要

A valve assembly providing flow control between a fuel tank and a carbon canister, which includes two valves providing two different flow paths, where the first valve provides active vacuum relief along the first flow path, and the second valve provides passive vacuum relief along the second flow path. A reservoir is added to the cap which is common for both flow paths. The second valve has a sealing valve member and a biasable member that passively relieves fuel tank vacuum pressure at a predetermined vacuum level.

主权项

1. An apparatus, comprising:
a valve assembly, including:
a first valve in fluid communication with a carbon canister and a fuel tank; anda second valve in fluid communication with the carbon canister and the fuel tank;wherein the first valve provides active control of air flow and purge vapor between the carbon canister and the fuel tank and active relief of vacuum pressure in the fuel tank, and the second valve provides passive relief of vacuum pressure in the fuel tank.