US 11,852,115 B2
Engine control system and methods
Alexander Konrad Fuhrman, Thief River Falls, MN (US); and Micheal Kevin Schley, Holt, MN (US)
Assigned to ARCTIC CAT INC., Thief River Falls, MN (US)
Filed by Arctic Cat Inc., Thief River Falls, MN (US)
Filed on Jun. 29, 2021, as Appl. No. 17/361,613.
Application 17/361,613 is a continuation in part of application No. 16/989,308, filed on Aug. 10, 2020.
Claims priority of provisional application 62/884,925, filed on Aug. 9, 2019.
Prior Publication US 2021/0324827 A1, Oct. 21, 2021
Int. Cl. F02P 5/04 (2006.01); F02B 75/02 (2006.01); F02D 41/38 (2006.01); F02P 5/15 (2006.01)
CPC F02P 5/045 (2013.01) [F02B 75/02 (2013.01); F02D 41/38 (2013.01); F02P 5/1502 (2013.01); F02B 2075/025 (2013.01); F02D 2200/101 (2013.01); F02D 2200/70 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of controlling a two-stroke internal combustion engine, comprising:
determining a short-term fuel correction;
measuring one or more engine parameters
determining an engine parameter range;
comparing one or more measured engine parameters to the engine parameter range;
starting a long-term fuel correction if the one or more measured engine parameters are within the engine parameter range, wherein starting the long-term fuel correction includes starting a time parameter to collect the one or more measured engine parameters for the long-term fuel correction;
providing a real-time engine hour criteria including a minimum run time;
measuring engine operation hours of the two-stroke internal combustion engine;
comparing the measured operation engine hours to the real-time engine hour criteria;
determining an engine parameter gradient;
comparing the one or more measured engine parameters to the engine parameter gradient during the time parameter; and
utilizing the one or more measured engine parameters to implement the long-term fuel correction.