US 12,366,222 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 Nov. 8, 2023, as Appl. No. 18/504,464.
Application 18/504,464 is a continuation of application No. 17/361,613, filed on Jun. 29, 2021, granted, now 11,852,115.
Application 17/361,613 is a continuation in part of application No. 16/989,308, filed on Aug. 10, 2020, granted, now 12,006,889.
Claims priority of provisional application 62/884,925, filed on Aug. 9, 2019.
Prior Publication US 2024/0084774 A1, Mar. 14, 2024
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)] 20 Claims
OG exemplary drawing
 
1. A method of controlling a two-stroke internal combustion engine, comprising:
determining a base nominal exhaust gas temperature using a measured exhaust valve position and a measured engine speed;
determining an exhaust gas temperature differential by comparing a current exhaust gas temperature to the base nominal exhaust gas temperature;
utilizing the exhaust gas temperature differential, the measured exhaust valve position, and the measured engine speed to calculate an exhaust gas temperature injection correction; and
implementing a fuel correction using the exhaust gas temperature injection correction, wherein the fuel correction controls a fuel injection amount in the two-stroke internal combustion engine.