公开(公告)号：US12221936B2

公开(公告)日：2025-02-11

申请号：US18565224

申请日：2022-02-21

Applicant: KUBOTA CORPORATION

Inventor： Yasushi Kobayashi ,  Hiroki Oso ,  Kiichi Suehiro ,  Yuki Tagashira ,  Koji Nakakita

IPC: F02D41/40 ,  F02D41/20

Abstract: A diesel engine 30 includes an injector 4 that uses a solenoid to directly drive a needle valve and inject a fuel and an injector control device 2 that controls the driving by the injector 4. The injector control device 2 includes a charge voltage control circuit 22, a storage unit 25 that stores a correction value related to an injection amount of the fuel injected from the injector 4, and an injector control circuit 24 that controls the driving by the injector 4 on the basis of each of a voltage supplied from the charge voltage control circuit 22 and the correction value stored in the storage unit 25. The correction value is set according to a voltage applied to a terminal of the injector control device 2 connected to a load when a current starts to flow in the load connected to the injector control device 2.

公开(公告)号：US12085010B2

公开(公告)日：2024-09-10

申请号：US18266586

申请日：2021-10-25

Applicant: KUBOTA Corporation

Inventor： Hiroki Oso ,  Yuki Tagashira ,  Akira Tamura ,  Rina Kaneko ,  Kiichi Suehiro

IPC: F02B19/18 ,  F01P1/10 ,  F02F11/00 ,  F02M61/14

CPC classification number: F02B19/18 ,  F01P1/10 ,  F02F11/002 ,  F02M61/14

Abstract: Provided is an electronic fuel injection type diesel engine capable of performing precise electronic fuel injection control. A fuel injector includes a main body portion having a large diameter, a nozzle portion having a small diameter, and a pressing surface formed at a step portion between the main body portion and the nozzle portion, in which the nozzle portion of the fuel injector is inserted from an inside of a sleeve into an inside of an insertion hole, the fuel injector is pressed toward a vortex chamber by a pressing force, and the pressing force applied to the fuel injector is received by a pressure receiving surface of the sleeve from the pressing surface of the fuel injector via the washer.