US 12,188,439 B2
Snowmobile
Rene Lemieux, Granby (CA); Etienne Poulin, St-Denis-de-Brompton (CA); Guillaume Morin, Racine (CA); and Nicolas Baron, Sherbrooke (CA)
Assigned to BOMBARDIER RECREATIONAL PRODUCTS INC., Valcourt (CA)
Appl. No. 18/555,260
Filed by BOMBARDIER RECREATIONAL PRODUCTS INC., Valcourt (CA)
PCT Filed Jan. 31, 2022, PCT No. PCT/IB2022/050828
§ 371(c)(1), (2) Date Oct. 13, 2023,
PCT Pub. No. WO2022/219417, PCT Pub. Date Oct. 20, 2022.
Claims priority of provisional application 63/175,143, filed on Apr. 15, 2021.
Prior Publication US 2024/0384694 A1, Nov. 21, 2024
Int. Cl. F02M 35/10 (2006.01); B62M 27/02 (2006.01)
CPC F02M 35/10262 (2013.01) [B62M 2027/023 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An airbox for an air intake system of an engine, the airbox comprising:
an air inlet for receiving air into the airbox;
an air outlet for discharging air from the airbox;
an airbox body defining:
a first expansion chamber, the air outlet opening into the first expansion chamber; and
a second expansion chamber fluidly connected to the first expansion chamber, the air inlet opening into the second expansion chamber,
the airbox body comprising a dividing wall separating the first expansion chamber from the second expansion chamber, the dividing wall defining a wall opening fluidly connecting the first and second expansion chambers; and
an interchangeable flute removably connected to the airbox body, the interchangeable flute being at least partly disposed in the second expansion chamber, the interchangeable flute being positioned to guide air flowing into the air inlet into the second expansion chamber, the interchangeable flute being removable such that a replacement flute can be installed in place of the interchangeable flute to selectively modify a noise output of the airbox.