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:
Dec. 30, 2025
Filed:
Apr. 25, 2023
Hitachi Astemo, Ltd., Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
The herein described subject matter relates in particular to a control device () and a method for controlling a fuel injector () attached to an internal combustion engine to allow reducing the deviation of the fuel amount between different injectors/different injections in ballistic operation, the control device () comprising a control parameter calculation unit (), an injection pulse calculation unit (), an injection pulse compensation unit () and at least one memory (or). The control parameter calculation unit () is configured to determine a target closing time for the fuel injector () based on a fuel amount to be injected into the internal combustion engine. If the determined target closing time is larger than a maximum closing time of the fuel injector () in ballistic operation, the injection pulse calculation unit () is configured to calculate a pulse duration for the injector () based on a characteristic curve of the fuel injector (), and to output the calculated pulse duration to the fuel injector () for injecting the fuel amount into the internal combustion engine. If the determined target closing time is equal to or smaller than the maximum closing time in the ballistic operation, the injection pulse compensation unit () is configured to receive a set of parameters from the at least one memory (or), to calculate a pulse duration for the fuel injector () based on the determined target closing time and the set of parameters; and to output the calculated pulse duration to the fuel injector () for injecting the fuel amount into the internal combustion engine.