US 12,065,807 B2
Anti-stall system for open circuit systems
Caleb Van De Stroet, Nordborg (DK); and Austin Hansell, Nordborg (DK)
Assigned to Danfoss Power Solutions Inc., Ames, IA (US)
Filed by Danfoss Power Solutions Inc., Ames, IA (US)
Filed on Jul. 7, 2021, as Appl. No. 17/368,979.
Claims priority of provisional application 63/048,697, filed on Jul. 7, 2020.
Prior Publication US 2022/0010528 A1, Jan. 13, 2022
Int. Cl. E02F 9/22 (2006.01); F02B 63/06 (2006.01); F02D 29/04 (2006.01); F15B 20/00 (2006.01); E02F 9/20 (2006.01)
CPC E02F 9/2246 (2013.01) [F02B 63/06 (2013.01); F02D 29/04 (2013.01); F15B 20/00 (2013.01); E02F 9/2066 (2013.01); F02D 2200/101 (2013.01); F15B 2211/20523 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An anti-stall system, comprising:
a work machine having an engine with an engine speed sensor, a hydraulic system, a command control, and a control system;
the hydraulic system comprising a pump and a valve stack having a pressure sensor;
the control system comprising:
a reactive block configured to issue a first command to the valve stack of the hydraulic system based on a first engine speed threshold being crossed, wherein the first engine speed threshold is based on a defined engine droop; and
a proactive block configured to issue a second valve command to the valve stack of the hydraulic system based upon a first torque threshold being crossed.