US 12,241,428 B2
Method and system for starting an internal combustion engine
Michel Bernier, Sherbrooke (CA); David Monfette, Linz (AT); and Bruno Schuehmacher, Richmond (CA)
Assigned to BOMBARDIER RECREATIONAL PRODUCTS INC., Valcourt (CA)
Filed by BOMBARDIER RECREATIONAL PRODUCTS INC., Valcourt (CA)
Filed on Nov. 13, 2023, as Appl. No. 18/507,572.
Application 16/681,418 is a division of application No. 16/485,852, granted, now 10,975,824, issued on Apr. 13, 2021, previously published as PCT/IB2017/052825, filed on May 12, 2017.
Application 18/507,572 is a continuation of application No. 17/873,879, filed on Jul. 26, 2022, granted, now 11,852,087.
Application 17/873,879 is a continuation of application No. 16/681,418, filed on Nov. 12, 2019, granted, now 11,448,146, issued on Sep. 20, 2022.
Application 16/681,418 is a continuation in part of application No. 15/775,616, granted, now 10,883,467, issued on Jan. 5, 2021, previously published as PCT/IB2016/056824, filed on Nov. 11, 2016.
Claims priority of provisional application 62/458,882, filed on Feb. 14, 2017.
Claims priority of provisional application 62/254,421, filed on Nov. 12, 2015.
Prior Publication US 2024/0084752 A1, Mar. 14, 2024
Int. Cl. F02D 41/00 (2006.01); F02B 33/04 (2006.01); F02D 41/06 (2006.01); F02N 3/02 (2006.01); F02N 11/04 (2006.01); F02N 11/06 (2006.01); F02P 5/04 (2006.01); F02N 11/08 (2006.01)
CPC F02D 41/009 (2013.01) [F02B 33/04 (2013.01); F02D 41/062 (2013.01); F02N 3/02 (2013.01); F02N 11/04 (2013.01); F02N 11/06 (2013.01); F02P 5/045 (2013.01); F02N 11/08 (2013.01); F02N 2011/0896 (2013.01); F02N 2200/021 (2013.01); F02N 2200/022 (2013.01); F02N 2300/104 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for starting an internal combustion engine (ICE) having a crankshaft and an electric turning machine (ETM) operatively connected to the crankshaft, the method comprising:
sensing a voltage of a capacitance connected to the ETM and configured to power the ETM;
detecting a rotation of the crankshaft resulting from an actuation of a recoil starter operatively connected to the crankshaft;
in response to detecting the rotation of the crankshaft, determining if an assisted start condition is met;
in response to the assisted start condition being met, delivering power from the capacitance to the ETM and the ETM assisting the recoil starter to turn the crankshaft for starting the ICE;
in response to the assisted start condition not being met, continuing to turn the crankshaft with the recoil starter without assistance from the ETM for starting the ICE;
determining if the ICE has started; and
in response to the ICE being started, delivering power from the ETM to the capacitance,
the assisted start condition comprising a temperature of an engine control unit (ECU) being at or above an ECU temperature threshold, the ECU controlling operation of the ICE once the ICE has started.