US 12,169,158 B2
Methods and systems for fuel system
Aed Dudar, Canton, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by Ford Global Technologies, LLC, Dearborn, MI (US)
Filed on Apr. 7, 2022, as Appl. No. 17/658,397.
Prior Publication US 2023/0324251 A1, Oct. 12, 2023
Int. Cl. G01M 3/26 (2006.01); G01G 19/08 (2006.01); G01K 3/00 (2006.01); G07C 5/08 (2006.01); F02D 41/22 (2006.01)
CPC G01M 3/26 (2013.01) [G01G 19/08 (2013.01); G01K 3/005 (2013.01); G07C 5/0808 (2013.01); F02D 2041/225 (2013.01); F02M 2700/05 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A system, comprising:
a vehicle comprising a fuel tank;
a vehicle weight sensor for obtaining a vehicle weight;
an ambient air temperature sensor for obtaining an ambient air temperature;
a ground surface temperature sensor for obtaining a ground surface temperature; and
a controller comprising computer-readable instructions stored on non-transitory memory thereof that when executed cause the controller to:
adjust a threshold pressure and a threshold vacuum of a fuel system leak diagnostic based on the vehicle weight and the ground surface temperature,
maintaining the threshold pressure and the threshold vacuum based on the vehicle weight being less than the threshold weight or the ground surface temperature being within a threshold difference of the ambient air temperature.