Control Device and Method for Controlling an Injector

• Main Authors: MIYAMOTO, Akiyasu, MIYAKE, Takao, YONEYA, Naoki
• Format: Patent
• Language: English
• Published: 21.08.2025
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

The herein described subject matter relates in particular to a control device (150) and a method for controlling a fuel injector (101) 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 (150) comprising a control parameter calculation unit (603), an injection pulse calculation unit (604), an injection pulse compensation unit (605) and at least one memory (607 or 608). The control parameter calculation unit (603) is configured to determine a target closing time for the fuel injector (101) 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 (101) in ballistic operation, the injection pulse calculation unit (604) is configured to calculate a pulse duration for the injector (101) based on a characteristic curve of the fuel injector (101), and to output the calculated pulse duration to the fuel injector (101) 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 (605) is configured to receive a set of parameters from the at least one memory (607 or 608), to calculate a pulse duration for the fuel injector (101) based on the determined target closing time and the set of parameters; and to output the calculated pulse duration to the fuel injector (101) for injecting the fuel amount into the internal combustion engine.