US Patent 7435289 Integrated air cleaner and vapor containment system

An air cleaner for an engine that includes a fuel tank and an air-fuel mixing device. The air cleaner includes a housing that defines an internal filter space and a canister at least partially formed as part of the housing. The canister is substantially non-permeable to fuel vapor. A first aperture provides fluid communication between the fuel tank and the canister and a second aperture provides fluid communication between the canister and the air-fuel mixing device.