US 12,258,916 B2
Engine assembly and method for controlling an engine
Bruno Schuehmacher, Richmond (CA); and Luc Champigny, Racine (CA)
Assigned to BOMBARDIER RECREATIONAL PRODUCTS INC., Valcourt (CA)
Filed by BOMBARDIER RECREATIONAL PRODUCTS INC., Valcourt (CA)
Filed on Feb. 21, 2024, as Appl. No. 18/583,613.
Application 17/691,666 is a division of application No. 17/639,140, granted, now 11,905,905, issued on Feb. 20, 2024, previously published as PCT/IB2020/058101, filed on Aug. 31, 2020.
Application 18/583,613 is a continuation of application No. 17/691,666, filed on Mar. 10, 2022, granted, now 11,913,390.
Claims priority of provisional application 62/959,586, filed on Jan. 10, 2020.
Claims priority of provisional application 62/893,916, filed on Aug. 30, 2019.
Prior Publication US 2024/0191664 A1, Jun. 13, 2024
Int. Cl. F02D 41/00 (2006.01); F02B 37/18 (2006.01); F02D 41/14 (2006.01); F02B 75/02 (2006.01); F02M 35/10 (2006.01)
CPC F02D 41/0007 (2013.01) [F02B 37/183 (2013.01); F02B 2075/025 (2013.01); F02D 41/1446 (2013.01); F02D 2200/0404 (2013.01); F02D 2200/10 (2013.01); F02D 2200/101 (2013.01); F02M 35/1019 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for controlling a two-stroke engine operatively connected to a turbocharger, the turbocharger being in fluid communication with the engine to provide a boost pressure thereto, the method comprising:
determining an exhaust temperature representative of an actual temperature of exhaust gas being discharged by the engine;
determining a temperature difference between the exhaust temperature and a threshold temperature;
determining an actual power output of the engine,
in response to the exhaust temperature being less than the corresponding threshold value:
determining a corrective amount of boost pressure to add to the boost pressure of the turbocharger, the corrective amount of boost pressure being determined based on the temperature difference,
the corrective amount of boost pressure being further determined based on:
comparing the actual power output of the engine and a corresponding power output threshold value thereof,
accessing a predefined dataset, and
retrieving the corrective amount of boost pressure from the predefined dataset based on the exhaust temperature and a throttle position of a throttle valve regulating air flow into the engine; and
controlling the turbocharger to increase the boost pressure of the turbocharger by the corrective amount.