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:
May. 24, 2022
Filed:
Jul. 27, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Masaya Kimura, Hitachinaka, JP;
Kyohei Matsumoto, Hitachinaka, JP;
Ryo Sasaki, Hitachinaka, JP;
Takuya Ikemoto, Hitachinaka, JP;
Daichi Kawakami, Hitachinaka, JP;
HITACHI ASTEMO, LTD., Hitachinaka, JP;
Abstract
An electromagnetic valve driving device includes: a maximum detection unit configured to detect a maximum point when time-series data of a differential value of a counter electromotive voltage generated in a solenoid has changed from an increase to a decrease by retrospectively tracing the time-series data in an opposite direction of a time series; and a valve closing time detection unit configured to execute a determination process of retrospectively tracing the time-series data from the maximum point detected by the maximum detection unit in the opposite direction and scanning whether or not an amount of decrease in the differential value from the maximum point exceeds a predetermined threshold value and detect a maximum time, which is a time of the maximum point, as a valve closing time of a fuel injection valve when there is an event in which the amount of decrease exceeds the predetermined threshold value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile