US 11,754,006 B1
Method and device for increasing purge rate of fuel evaporation gas of vehicle
Jung Seop Son, 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. 16, 2022, as Appl. No. 17/988,433.
Claims priority of application No. 10-2022-0072691 (KR), filed on Jun. 15, 2022.
Int. Cl. F02D 41/00 (2006.01); F02M 25/08 (2006.01); F02D 41/14 (2006.01)
CPC F02D 41/0045 (2013.01) [F02D 41/004 (2013.01); F02D 41/1401 (2013.01); F02D 41/1454 (2013.01); F02M 25/0827 (2013.01); F02D 2041/1432 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method comprising:
determining, by a controller, a first fuel evaporation gas density in a purge pump included in an active fuel evaporation gas purge system of a vehicle based on at least one of:
a difference between a pressure measured at a front end of the purge pump and a pressure measured at a rear end of the purge pump,
a radius of a fluid passage of the purge pump,
a number of rotations of the purge pump, or
an opening amount of a purge control solenoid valve that supplies fuel evaporation gas pumped by the purge pump to an intake manifold of an engine of the vehicle;
filtering, by the controller, the first fuel evaporation gas density using a filter for controlling 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;
determining, by the controller, a second fuel evaporation gas density in the purge pump based on the filtered first fuel evaporation gas density;
determining, by the controller, a third fuel evaporation gas density in a standard temperature and 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;
determining, by the controller, a concentration of hydrocarbon in the fuel evaporation gas in the purge pump based on the third fuel evaporation gas density; and
increasing, by the controller, a purge rate of the fuel evaporation gas based on the determined concentration of hydrocarbon in the fuel evaporation gas.