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:
Feb. 25, 2025
Filed:
Sep. 15, 2021
Applicant:
Hitachi Astemo, Ltd., Hitachinaka, JP;
Inventors:
Assignee:
Hitachi Astemo, Ltd., Hitachinaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02D 43/04 (2006.01); F02D 41/00 (2006.01); F02D 41/34 (2006.01);
U.S. Cl.
CPC ...
F02D 43/04 (2013.01); F02D 41/0057 (2013.01); F02D 41/009 (2013.01); F02D 41/34 (2013.01); F02D 2200/101 (2013.01);
Abstract
A rotation speed or a rotation time of a crankshaft at a certain angle is calculated on a basis of a change in a detection signal of a sensor of the crankshaft. Then, when a combustion cylinder is switched, information on the rotation speed or the rotation time for at least two combustion cycles is obtained, and a combustion phase is calculated on the basis of the rotation speed or the rotation time. Accordingly, by using the that measures rotation of the crankshaft, it becomes possible to detect a combustion state of the internal combustion engine with high accuracy.