US 12,000,319 B2
Three-way catalytic converter preheating control method and system, vehicle and storage medium
Junqi Liu, Ningbo (CN); Chen Yang, Ningbo (CN); Shubo Li, Ningbo (CN); Rongchun Ma, Ningbo (CN); Jie Chen, Ningbo (CN); Xudong Sun, Ningbo (CN); Yige Xiao, Ningbo (CN); and Ruiping Wang, Ningbo (CN)
Assigned to Zhejiang Geely Holding Group Co., Ltd., Hangzhou (CN); Ningbo Geely Royal Engine Components Co., Ltd., Ningbo (CN); and Aurobay Technology Co., Ltd., Ningbo (CN)
Appl. No. 18/041,801
Filed by Zhejiang Geely Holding Group Co., Ltd., Hangzhou (CN); Ningbo Geely Royal Engine Components Co., Ltd., Ningbo (CN); and Aurobay Technology Co., Ltd., Ningbo (CN)
PCT Filed Jun. 13, 2022, PCT No. PCT/CN2022/098490
§ 371(c)(1), (2) Date Feb. 16, 2023,
PCT Pub. No. WO2022/262690, PCT Pub. Date Dec. 22, 2022.
Claims priority of application No. 202110680005.3 (CN), filed on Jun. 18, 2021.
Prior Publication US 2023/0296040 A1, Sep. 21, 2023
Int. Cl. F01N 3/20 (2006.01); B60L 1/12 (2006.01); B60W 20/00 (2016.01); F01N 3/027 (2006.01); F01N 3/08 (2006.01); F01N 3/10 (2006.01); F01N 9/00 (2006.01); F01N 11/00 (2006.01)
CPC F01N 3/2013 (2013.01) [B60L 1/12 (2013.01); B60W 20/00 (2013.01); F01N 3/101 (2013.01); B60W 2710/0694 (2013.01); B60W 2710/086 (2013.01); F01N 3/027 (2013.01); F01N 3/0892 (2013.01); F01N 9/005 (2013.01); F01N 9/007 (2013.01); F01N 11/002 (2013.01); F01N 11/005 (2013.01); F01N 2390/02 (2013.01); F01N 2550/22 (2013.01); F01N 2900/1404 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A three-way catalytic converter preheating control method, characterized in that, it is applied to a hybrid vehicle and comprises:
when the temperature of an exhaust pipe of the hybrid electric vehicle is lower than a first temperature threshold, sending a first work instruction to a high-and-low-voltage-conversion module;
the high-and-low-voltage-conversion module outputting a first working voltage to turn on the electric heating of the catalyst according to the first working instruction;
obtaining working data of the hybrid electric vehicle;
when the working data meets a switching condition, sending a second working instruction to the high-and-low-voltage-conversion module;
the high-and-low-voltage-conversion module outputting a second working voltage and stopping outputting the first working voltage according to the second working instruction to stop the electric heating;
starting an engine of the hybrid electric vehicle according to the second operating voltage;
wherein the switching condition is that the output duration of the first working voltage reaches a first-time threshold; or, the temperature of an exhaust pipe is not lower than the first temperature threshold;
wherein the first working voltage is 48V, and the second working voltage is 12V.