US 11,491,866 B2 · Evaporative emissions fuel tank venting system with pressure relief

Abstract

A vent shut-off assembly configured to manage venting on a fuel tank configured to deliver fuel to an internal combustion engine includes a first liquid vapor discriminator (LVD), a main housing, a first poppet valve assembly, a pump and an actuator assembly. The first LVD is disposed in the fuel tank. The main housing selectively vents to a carbon canister. The first poppet valve assembly has a first poppet valve arranged in the main housing. The pump selectively pumps liquid fuel from the main housing. The actuator assembly is at least partially housed in the main housing and includes a cam assembly having a cam shaft that includes a first cam and a second cam. The first cam has a profile that one of opens and closes the first poppet valve fluidly coupled to the first LVD.

Claims20

Dependent claims

A vent shut-off assembly configured to manage venting on a fuel tank system configured to deliver fuel to an internal combustion engine, the vent shut-off assembly comprising:

a carbon canister adapted to collect fuel vapor emitted by the fuel tank and to subsequently release the fuel vapor to the engine;
an actuator assembly including a motor drive that rotates a camshaft having at least a first cam and a second cam disposed in a housing, the actuator assembly having:
a first plunger assembly that selectively fluidly connects the fuel tank and the carbon canister;
a second plunger assembly that selectively fluidly connects the fuel tank and the carbon canister;
and
one of an over pressure relief (OPR) valve and over vacuum relief (OVR) valve configured at the first plunger assembly.

3 more elements

Dependencies are inferred from the claim text.

Evaporative emissions fuel tank venting system with pressure relief

Life of this patent

Evaporative emissions fuel tank venting system with pressure relief

Life of this patent

Abstract

Claims20