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:
Oct. 07, 2025
Filed:
Nov. 30, 2022
Bombardier Recreational Products Inc., Valcourt, CA;
Bruno Schuehmacher, Richmond, CA;
Sebastien Thibault, Sherbrooke, CA;
Marc Giguere, Magog, CA;
Vincent Gamache, Granby, CA;
Luc Champigny, Racine, CA;
Claude Fortin, St-Denis-de-Brompton, CA;
BOMBARDIER RECREATIONAL PRODUCTS INC., Valcourt, CA;
Abstract
A two-stroke engine assembly has a two-stroke internal combustion engine (ICE) and an exhaust system fluidly connected to the ICE. The exhaust system has a tuned pipe and at least one catalytic converter. A bypass valve is provided to selectively bypass the at least one catalytic converter. A method for controlling a two-stroke engine assembly controls the ICE to bring the temperature of exhaust gases within an operating temperature range of the catalytic converter. Another method for controlling a two-stroke engine assembly uses a lambda sensor to control the air-fuel ratio in cylinders of the ICE.