US 11,834,975 B2
Method for purifying exhaust gas and electronic device therefor
ChangHoon Lee, Seongnam (KR)
Assigned to Vitesco Technologies GmbH, Regensburg (DE)
Filed by Vitesco Technologies GmbH, Regensburg (DE)
Filed on May 19, 2022, as Appl. No. 17/664,106.
Application 17/664,106 is a continuation of application No. PCT/EP2020/082663, filed on Nov. 19, 2020.
Claims priority of application No. 10-2019-0149707 (KR), filed on Nov. 20, 2019.
Prior Publication US 2022/0275742 A1, Sep. 1, 2022
Int. Cl. F01N 3/20 (2006.01); F01N 3/10 (2006.01)
CPC F01N 3/2013 (2013.01) [F01N 3/101 (2013.01); F01N 2240/16 (2013.01); F01N 2900/1402 (2013.01); F01N 2900/1621 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An electronic device for purifying exhaust gas comprising:
a sensor module comprising a first sensor module and a second sensor module;
a heating device;
a memory; and
a processor operatively coupled to the sensor module, the heating device, and the memory, the processor configured to:
control the heating device such that a catalytic converter of a vehicle is heated,
measure a first air-fuel ratio of the exhaust gas passing through the catalytic converter using the first sensor module during heating of the catalytic converter,
measure a second air-fuel ratio of the exhaust gas exiting the catalytic converter using the second sensor module during heating of the catalytic converter,
identify a purification efficiency of the catalytic converter by comparing the first air-fuel ratio and the second air-fuel ratio,
determine whether the purification efficiency exceeds a reference efficiency, and
when the purification efficiency exceeds the reference efficiency, control the heating device such that heating of the catalytic converter is ended based on the air-fuel ratio of the exhaust gas.