US 11,754,009 B2
Method and system for controlling EGR device in high-load driving, and internal combustion engine vehicle including the system
Ju-Hyun Park, Gyeonggi-do (KR)
Assigned to Hyundai Kefico Corporation, Gyeonggi-Do (KR)
Filed by HYUNDAI KEFICO CORPORATION, Gyeonggi-do (KR)
Filed on Mar. 29, 2022, as Appl. No. 17/706,876.
Claims priority of application No. 10-2021-0040741 (KR), filed on Mar. 29, 2021.
Prior Publication US 2022/0307435 A1, Sep. 29, 2022
Int. Cl. F02D 41/00 (2006.01); F02M 26/49 (2016.01)
CPC F02D 41/0052 (2013.01) [F02D 41/0002 (2013.01); F02D 41/0077 (2013.01); F02M 26/49 (2016.02); F02D 2200/0406 (2013.01); F02D 2200/1002 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of controlling an Exhaust Gas Recirculation (EGR) device in high-load driving, the method comprising:
(a) comparing a ratio of pressures at a front end and a rear end of a throttle valve with a preset critical value that is a reference for determining high-load driving;
(b) performing Wide Open Throttle (WOT) control for fully opening the throttle valve when the ratio of pressures is larger than the preset critical value;
(c) determining whether engine torque due to the WOT control and use of EGR satisfies torque requested by a driver; and
(d) correcting throttle opening or stopping use of EGR, depending on whether the engine torque due to use of EGR together with the WOT control satisfies the requested torque,
wherein, in (c), whether the requested torque is satisfied is determined by comparing a torque loss due to a loss of intake air amount by inflow of EGR gas with a torque gain due to improvement of ignition efficiency by inflow of EGR gas.