US 11,738,297 B2
Hydrocarbon absorbing air filter box
Steve Williams, Cherry Valley, CA (US)
Assigned to K&N Engineering, Inc., Riverside, CA (US)
Filed by K&N Engineering, Inc., Riverside, CA (US)
Filed on Oct. 25, 2019, as Appl. No. 16/664,692.
Claims priority of provisional application 62/751,581, filed on Oct. 27, 2018.
Prior Publication US 2020/0129912 A1, Apr. 30, 2020
Int. Cl. B01D 53/02 (2006.01); G01F 1/00 (2022.01); F02M 35/02 (2006.01); F02M 35/024 (2006.01)
CPC B01D 53/02 (2013.01) [B01D 2257/702 (2013.01); B01D 2259/4566 (2013.01); F02M 35/0205 (2013.01); F02M 35/0218 (2013.01); F02M 35/02416 (2013.01); G01F 1/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A hydrocarbon absorbing air filter box for arresting evaporative hydrocarbon emissions from an air intake duct of an internal combustion engine, the hydrocarbon absorbing air filter box comprising:
a housing including at least one air inlet for communicating an airstream into an interior of the housing;
an air filter supported within the interior for removing particulate matter from the airstream; and
a combined mass airflow sensor and hydrocarbon trap configured to communicate the airstream from the air filter to the air intake duct wherein the combined mass airflow sensor and hydrocarbon trap are contained within a second housing within the air filter box;
wherein the housing is configured to improve movement of the airstream through the air filter.