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:
Oct. 01, 2024
Filed:
Aug. 27, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Kunihiko Suzuki, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
Provided is an electronic control device that controls an engine including an EGR system that includes an EGR pipe and an EGR valve disposed in the EGR pipe, an air flow sensor provided in an intake pipe, a throttle valve on a downstream side of the air flow sensor, and an intake pipe pressure sensor that detects an intake pipe pressure. The electronic control device includes a state estimation unit that estimates the intake pipe pressure and an EGR rate based on at least a detection value from the air flow sensor and an EGR valve opening, and an estimation value correction unit that corrects an EGR rate estimation value from the state estimation unit based on a detection value from the intake pipe pressure sensor and an intake pipe pressure estimation value from the state estimation unit.