US 12,071,877 B2
Electronic control device
Hiroto Ishikawa, Hitachinaka (JP); and Kunihiko Suzuki, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/927,926
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Feb. 9, 2021, PCT No. PCT/JP2021/004716
§ 371(c)(1), (2) Date Nov. 28, 2022,
PCT Pub. No. WO2021/260999, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 2020-108561 (JP), filed on Jun. 24, 2020.
Prior Publication US 2023/0203979 A1, Jun. 29, 2023
Int. Cl. F01N 11/00 (2006.01); F01N 3/20 (2006.01); F02D 41/02 (2006.01)
CPC F01N 11/005 (2013.01) [F01N 3/2013 (2013.01); F02D 41/0235 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An electronic control device that controls an engine system that includes an internal combustion engine, a motor capable of motoring the internal combustion engine, a catalyst that is installed in an exhaust passage of the internal combustion engine, has a function of being heated by energization, and purifies exhaust gas, and a downstream temperature sensor installed on a downstream side of the catalyst, the electronic control device comprising:
a controller to cause the motor to motor the internal combustion engine; and
an estimator that runs a first estimation process of estimating a temperature of the catalyst based on detection information of the downstream temperature sensor when the internal combustion engine is motored;
wherein the estimator runs a second estimation process of estimating a temperature of the catalyst from an estimated temperature of the catalyst at a previous power interruption and an elapsed time from the previous power interruption before performing the first estimation process and before the internal combustion engine is started.