| US 11,788,451 B2 | ||
| Control method and control device for internal combustion engine | ||
| Kouichi Murakami, Kanagawa (JP); Jin Yokoyama, Kanagawa (JP); Akikazu Sakai, Kanagawa (JP); and Hideaki Takahashi, Kanagawa (JP) | ||
| Assigned to NISSAN MOTOR CO., LTD., Yokohama (JP) | ||
| Appl. No. 17/926,689 | ||
| Filed by NISSAN MOTOR CO., LTD., Yokohama (JP) | ||
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PCT Filed May 28, 2020, PCT No. PCT/IB2020/000511 § 371(c)(1), (2) Date Nov. 21, 2022, PCT Pub. No. WO2021/240189, PCT Pub. Date Dec. 2, 2021. |
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| Prior Publication US 2023/0193799 A1, Jun. 22, 2023 | ||
| Int. Cl. F01N 3/20 (2006.01); F01N 3/05 (2006.01); F01N 9/00 (2006.01); F01N 3/32 (2006.01) | ||
| CPC F01N 3/2013 (2013.01) [F01N 3/05 (2013.01); F01N 3/32 (2013.01); F01N 9/00 (2013.01); F01N 2270/02 (2013.01); F01N 2550/22 (2013.01); F01N 2900/0421 (2013.01); F01N 2900/1404 (2013.01)] | 8 Claims |
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1. A method for controlling an internal combustion engine having an electric heating catalyst in an exhaust system, the method including starting preheating of the electric heating catalyst by energizing the electric heating catalyst before starting the internal combustion engine, and performing the preheating until an estimated temperature of the electric heating catalyst, which is sequentially estimated, reaches a predetermined temperature, the method comprising:
when information on the estimated temperature is lost during the preheating due to loss of power of an engine controller, forbidding energization of the electric heating catalyst until a cooling period necessary for temperature of the electric heating catalyst to fall elapses after recovery of the power of the engine controller. |