US 12,276,650 B2
Method and device for calculating concentration of hydrocarbon in fuel evaporation gas of vehicle
Jung Seop Son, Seoul (KR); Taegon Noh, Seoul (KR); and HyungSeok Yoon, Hwaseong-si (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Nov. 23, 2022, as Appl. No. 17/993,781.
Claims priority of application No. 10-2022-0072690 (KR), filed on Jun. 15, 2022.
Prior Publication US 2023/0408480 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 33/22 (2006.01); F02D 41/00 (2006.01); F02D 41/14 (2006.01); F02M 25/08 (2006.01); G01N 9/26 (2006.01)
CPC G01N 33/225 (2013.01) [F02D 41/004 (2013.01); F02D 41/0045 (2013.01); F02M 25/08 (2013.01); F02M 25/0836 (2013.01); F02M 25/089 (2013.01); G01N 9/26 (2013.01); F02D 2041/1432 (2013.01); F02M 2025/0845 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for providing fuel to an engine of a vehicle based on calculating a concentration of hydrocarbon in fuel evaporation gas of the vehicle, the vehicle further including an active fuel vapor purge system that includes a purge pump and a purge control solenoid valve configured to supply fuel evaporation gas pumped by the purge pump to an intake manifold of the engine, the method comprising:
calculating, by a controller, a first fuel evaporation gas density in the purge pump based on (i) a difference between a first pressure detected at a front end of the purge pump and a second pressure detected at a rear end of the purge pump, (ii) a radius of a fluid passage of the purge pump, (iii) a number of rotations of the purge pump, and (iv) an opening amount of the purge control solenoid valve;
filtering, by the controller, the first fuel evaporation gas density using a signal filter, the signal filter being configured to control an amount of change in the first fuel evaporation gas density based on the amount of change in the first fuel evaporation gas density being greater than or equal to a reference change amount;
calculating, by the controller, a second fuel evaporation gas density in the purge pump based on the filtered first fuel evaporation gas density;
calculating, by the controller, a third fuel evaporation gas density in a standard temperature and a standard pressure state based on the second fuel evaporation gas density, a current pressure in the purge pump, and a current temperature in the purge pump;
calculating, by the controller, the concentration of hydrocarbon in the fuel evaporation gas in the purge pump based on the third fuel evaporation gas density; and
controlling, by the controller, at least one of the engine, the purge control solenoid valve, or the purge pump based on the concentration of hydrocarbon to thereby adjust an amount of the fuel provided to the engine and control an air-fuel ratio for operation of the engine.