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:
Sep. 22, 2026
Filed:
Feb. 01, 2022
Hitachi Astemo, Ltd., Hitachinaka, JP;
Shinya Matohara, Hitachinaka, JP;
Takeshi Eto, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
An ECU includes a processing device that repeatedly executes an air amount calculation process for estimating a flow rate of intake air. The processing device acquires a detection value of a flow rate sensor and stores the detection value in a storage device, stores a time when the detection value of the flow rate sensor is acquired in the storage device as a first time stamp, and stores a time when the air amount calculation process is executed in the storage device as a second time stamp. In the air amount calculation process of the processing device, an execution interval of a calculation process at a current time point is calculated based on the second time stamp, an integration period having the same time width as the execution interval of the calculation process at the current time point is set based on the second time stamp, an integrated mass of the intake air in the integration period is calculated based on a detection value of the flow rate sensor and the first time stamp, and the flow rate of the intake air in the integration period is estimated using the integrated mass of the calculation result and the execution interval.