US 11,719,213 B2
Systems and methods for preventing activation of a starter based on engine speed
Travis Orvedahl, Neenah, WI (US); and John Steffens, Appleton, WI (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Sep. 28, 2020, as Appl. No. 17/35,268.
Claims priority of provisional application 62/924,377, filed on Oct. 22, 2019.
Prior Publication US 2021/0115890 A1, Apr. 22, 2021
Int. Cl. F02M 11/08 (2006.01); F02N 11/10 (2006.01); F02D 29/06 (2006.01); F02D 41/02 (2006.01); F02D 41/06 (2006.01); F02B 63/04 (2006.01); F02N 11/08 (2006.01); G05D 1/00 (2006.01)
CPC F02N 11/105 (2013.01) [F02B 63/042 (2013.01); F02N 11/08 (2013.01); F02N 11/0807 (2013.01); G05D 1/005 (2013.01); G05D 1/0016 (2013.01); G05D 1/0022 (2013.01); F02N 2011/0881 (2013.01); F02N 2200/022 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An engine driven welding power system comprising:
an engine arranged in an enclosure of the engine driven welding power system;
a current transformer configured to generate an induced current in response to an excitation current generated in an excitation circuit in response to rotation movement of the engine, wherein the induced current comprises one or more characteristics corresponding to engine speed; and
a welding power supply comprising a control circuit configured to:
receive a signal from the current transformer representing the one or more characteristics;
determine the engine speed based on the one or more characteristics; and
preventing activation of an engine starter in response to the engine speed exceeding a threshold engine speed value.