The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2020
Filed:
Sep. 27, 2018
GM Global Technology Operations Llc, Detroit, MI (US);
Jason M. Andrzejewski, Washington, MI (US);
Timothy E. McCarthy, Grand Blanc, MI (US);
GM GLOBAL Technology Operations LLC, Detroit, MI (US);
Abstract
An exemplary system for monitoring and controlling evaporative emissions for a vehicle includes a first fuel vapor adsorption canister, a second fuel vapor adsorption canister, a first passage from the fuel supply to the first canister, a second passage from the first canister to the canister, the second passage including a first valve selectively actuatable from a first position to a second position, a third passage from the first and second canisters for venting the first and second canisters, a fourth passage connecting the second canister to the third passage, and a controller electrically connected to the first valve. Fuel vapor is routed to the first canister when a first condition is not satisfied and fuel vapor is routed to the second canister when the first condition is satisfied.