US 12,276,240 B2
Leak detection module entropy method for evaporative emissions system
Mark William Peters, Wolverine Lake, MI (US)
Assigned to STONERIDGE CONTROL DEVICES, INC., Novi, MI (US)
Appl. No. 18/023,523
Filed by STONERIDGE CONTROL DEVICES, INC., Novi, MI (US)
PCT Filed Sep. 15, 2021, PCT No. PCT/US2021/050404
§ 371(c)(1), (2) Date Feb. 27, 2023,
PCT Pub. No. WO2022/060794, PCT Pub. Date Mar. 24, 2022.
Claims priority of provisional application 63/078,612, filed on Sep. 15, 2020.
Prior Publication US 2023/0313762 A1, Oct. 5, 2023
Int. Cl. G01M 3/02 (2006.01); F02M 25/08 (2006.01)
CPC F02M 25/0818 (2013.01) [F02M 25/0836 (2013.01); F02M 25/089 (2013.01); G01M 3/025 (2013.01); F02M 2025/0845 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of detecting a leak in an evaporative emissions system, comprising:
sealing an evaporative emissions system;
activating a pump a first time to achieve a first target pressure in the evaporative emissions system;
holding the system sealed after achieving the first target pressure for a predetermined metric that allows a desired heat exchange to occur in the system, the holding occurring before again activating the pump a second time to achieve a second target pressure in the evaporative emissions system; and
monitoring a system pressure subsequent to the second target pressure achieving step to determine a leak condition of the evaporative emissions system.