Patent ID: 11945298
Assignee: DELPHI TECHNOLOGIES IP LIMITED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 15:
16. A fuel tank isolation valve in an evaporative emissions system having a fuel tank and a canister, the fuel tank isolation valve comprising:
a main valve body including a first port and a second port, the first port in fluid communication with a fuel tank and the second port in fluid communication with a fuel vapor canister, the main valve body defining a main bore through which vented fuel vapors can move from the first port to the second port, the main bore including a main bore axis;
a push to connect fitting defining a female receiving bore configured to receive a male connector extending outward from the canister without any intervening hoses disposed between the canister and the fitting, the fitting including an o-ring, a spacer adjacent the o-ring and a clip operable in a release mode and a lock mode in which the clip engages the male connector to secure the fitting to the canister in a sealed configuration;
a vent solenoid joined with the main valve body and disposed in the main bore, the vent solenoid operable in a normally open mode in which fuel vapors from the first port can move to the second port through the main bore along a first path, and a closed mode in which fuel vapors are inhibited from moving from the first port to the second port through the main bore along the first path due to the vent solenoid occluding the first path; and
an airflow bypass orifice having a first opening defined by the main valve body at a first end and a second opening defined by the second port at a second end opposite the first end, the airflow bypass orifice defined by the main valve body in fluid communication with the first port and with the second port,
wherein the airflow bypass orifice allows fuel vapors to be vented from the first port, through the main bore, through the first opening, through the airflow bypass orifice, which is devoid of any biasing element between the first opening and the second opening, through the second opening, out the second port, and to the canister along a second path, without passing through a hose between the second port and the canister, while the vent solenoid is in the closed mode and the fuel vapors are inhibited from moving from the first port to the second port through the vent solenoid and main bore along the first path due to the vent solenoid occluding the first path,
whereby flow of fuel vapors along the second path through the airflow bypass orifice equalizes pressure within the fuel tank and canister during a purging operation on the canister in which a vacuum is drawn by an engine through the canister.