US 11,815,037 B2
Method and system for controlling a two stroke engine based on fuel pressure
James H. Buchwitz, Roseau, MN (US); Lucas R. Salfer, Salol, MN (US); G. Jay McKoskey, Forest Lake, MN (US); Jacob Hanson, Fridley, MN (US); Ron Danielson, Roseau, MN (US); Andreas H. Bilek, Chisago City, MN (US); Dallas J. Blake, Roseau, MN (US); Ralph W. Lauzze, III, Hugo, MN (US); and Eric L. Gausen, Warroad, MN (US)
Assigned to Polaris Industries Inc., Medina, MN (US)
Filed by Polaris Industries Inc., Medina, MN (US)
Filed on Jul. 21, 2022, as Appl. No. 17/870,028.
Application 17/870,028 is a division of application No. 16/696,198, filed on Nov. 26, 2019, abandoned.
Claims priority of provisional application 62/776,579, filed on Dec. 7, 2018.
Prior Publication US 2022/0356850 A1, Nov. 10, 2022
Int. Cl. F02D 19/02 (2006.01); F02M 59/20 (2006.01); F02B 75/02 (2006.01); F02D 31/00 (2006.01)
CPC F02D 19/028 (2013.01) [F02B 75/02 (2013.01); F02D 31/007 (2013.01); F02M 59/20 (2013.01); F02B 2075/025 (2013.01); F02D 2200/0625 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of operating a two-stroke engine comprising:
determining a beginning time of a window for measuring fuel pressure, wherein the beginning time is a function of electrical injection, mechanical injection and sensor delay;
determining an ending time of the window;
measuring fuel pressure between the beginning time and the ending time;
determining a fuel pulsewidth based on the fuel pressure; and
injecting fuel into the two-stroke engine in response to the pulsewidth.