US 12,345,214 B2
Internal combustion engine control device
Akiyasu Miyamoto, Tokyo (JP); Henning Sauerland, Schwaig-Oberding (DE); Naoki Yoneya, Tokyo (JP); and Yoshihito Yasukawa, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 18/287,738
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Feb. 15, 2022, PCT No. PCT/JP2022/005963
§ 371(c)(1), (2) Date Oct. 20, 2023,
PCT Pub. No. WO2023/276245, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 2021-107110 (JP), filed on Jun. 28, 2021.
Prior Publication US 2024/0360797 A1, Oct. 31, 2024
Int. Cl. F02D 19/08 (2006.01); F02D 41/04 (2006.01)
CPC F02D 19/081 (2013.01) [F02D 41/04 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An internal combustion engine control device comprising an engine control unit, the engine control unit configured to:
estimate a fuel temperature of fuel supplied to a combustion chamber;
acquire a fuel pressure at which a fuel injection device injects the fuel;
detect that the fuel injection device is closed when the fuel temperature reaches a designated temperature and calculate a valve closing time of the fuel injection device;
calculate a valve closing delay time taken from start of valve closing to completion of the valve closing by the fuel injection device in a valve opening state for each of the plurality of designated temperatures based on a plurality of valve closing times calculated at a plurality of different designated temperatures, normalize the plurality of valve closing delay times calculated for each of the plurality of designated temperatures with the fuel pressure, and calculate a difference between the valve closing delay times;
calculate a synthetic fuel content rate of the fuel stored in a fuel storage unit based on characteristic data indicating a relationship between the difference between the valve closing delay times and the synthetic fuel content rate of the synthetic fuel contained in the fuel; and
control an internal combustion engine such that an exhaust temperature of an exhaust gas discharged from the combustion chamber becomes not less than a threshold temperature based on the synthetic fuel content rate.