US 12,228,103 B2
Internal combustion engine control device
Hayato Takei, Hitachinaka (JP); Shinya Sato, Hitachinaka (JP); and Akihiro Komori, Hitachinaka (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 18/562,524
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Feb. 15, 2022, PCT No. PCT/JP2022/005964
§ 371(c)(1), (2) Date Nov. 20, 2023,
PCT Pub. No. WO2022/264513, PCT Pub. Date Dec. 22, 2022.
Claims priority of application No. 2021-100613 (JP), filed on Jun. 17, 2021.
Prior Publication US 2024/0240602 A1, Jul. 18, 2024
Int. Cl. F02P 5/15 (2006.01); F02D 41/00 (2006.01)
CPC F02P 5/1502 (2013.01) [F02D 41/009 (2013.01); F02D 2200/024 (2013.01); F02D 2200/101 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An internal combustion engine control device comprising:
a rotation speed calculating unit that is operatively connected to an internal combustion engine and that detects a time difference Δt between adjacent signal teeth of each predetermined crank angle, passing a detection portion of a crank angle sensor, and calculates crank rotation speeds of an internal combustion engine based on the time difference Δt;
an extreme timing calculating unit that is operatively connected to the internal combustion engine and that calculates an extreme timing at which the crank rotation speeds become an extreme value;
an average rotation speed calculating unit that is operatively connected to the internal combustion engine and that calculates an average rotation speed of the crank rotation speeds;
a combustion state estimating unit that is operatively connected to the internal combustion engine and that estimates a combustion phase in which a mass fraction burned in the internal combustion engine becomes a set value based on the extreme timing at which the crank rotation speeds become the extreme value and the average rotation speed; and
an ignition time computing unit that is operatively connected to the internal combustion engine and that calculates an ignition time for performing combustion control of the internal combustion engine so that the combustion phase estimated by the combustion state estimating unit becomes a target combustion phase.