US 12,247,526 B2
Systems and methods for resetting a pressure relief valve of a common rail fuel system
Michael E. Sattler, Eureka, IL (US); Daniel R. Puckett, Peoria, IL (US); and Bradley S. Bashore, Washington, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jun. 12, 2023, as Appl. No. 18/333,453.
Prior Publication US 2024/0410326 A1, Dec. 12, 2024
Int. Cl. F02D 41/38 (2006.01); F02M 55/02 (2006.01); F02M 59/44 (2006.01); F02M 59/46 (2006.01)
CPC F02D 41/3863 (2013.01) [F02M 55/025 (2013.01); F02M 59/447 (2013.01); F02M 59/46 (2013.01); F02D 2200/0602 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of controlling a common rail fuel system of an engine system, the common rail fuel system having a fuel pump, a fuel rail, a plurality of fuel injectors, and a pressure-responsive relief valve fluidly coupled to the fuel rail, the method comprising:
identifying a pressure condition of the fuel rail indicative of the pressure-responsive relief valve being in an open and latched condition, the identification being based on detecting a rise and subsequent reduction in rail pressure, wherein identifying the pressure condition includes:
detecting the reduction in the rail pressure of the common fuel rail system; and
determining whether the reduction in the rail pressure was caused by a high pressure rail event or a low pressure rail event; and
in response to determining that the reduction in the rail pressure was caused by a high pressure rail event, terminating flow from the fuel pump, while the common rail fuel system is operating, to unlatch and close the pressure-responsive relief valve.