The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 2025
Filed:
Jan. 25, 2022
Hitachi Astemo, Ltd., Hitachinaka, JP;
Kunihiko Suzuki, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
A processor (B, B) of a control device for an internal combustion engineoperates a first combustion timing (MFB) or a first combustion period (IG_) in a cylinder of the internal combustion enginefrom a crank angle detected by a crank angle sensor. A processor (B) operates a heat generation rate based on a first combustion timing or a first combustion period. A processor (B) operates in-cylinder pressure and in-cylinder unburned gas temperature based on the heat generation rate. A processor (B) operates a first combustion speed (laminar flow combustion speed SL) based on the in-cylinder pressure and the in-cylinder unburned gas temperature. A processor (B) learns a correspondence relationship between the first combustion speed and the first combustion timing or the first combustion period.