公开(公告)号：US20240254953A1

公开(公告)日：2024-08-01

申请号：US18564235

申请日：2022-02-21

Applicant: KUBOTA CORPORATION

Inventor： Akira TAMURA ,  Hiroki OSO ,  Naotaro NAGAI ,  Shingo MATSUNOBU ,  Masanari TENNOMI

IPC: F02M61/14

CPC classification number: F02M61/14 ,  F02M2200/40

Abstract: An object of the present invention is to provide a fuel injection system capable of suppressing an occurrence of distortion in an injector during assembly of components. A fuel injection system (3) includes: a bracket (5) which is fixed to a cylinder head (21) of an engine (2); a fuel accumulator (6) which is supported by and fixed to the bracket (5) and which accumulates pressure of fuel supplied from a fuel pump; and an injector (7) which is directly connected to the fuel accumulator (6) and mounted to the cylinder head (21) and which injects the fuel, supplied from the fuel accumulator (6), into a combustion chamber. At least one of the fuel accumulator (6) and the bracket (5) has guide members (64, 513) which guide the injector (7) to a mount position on the cylinder head (21).

公开(公告)号：US20240044283A1

公开(公告)日：2024-02-08

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 ,  F02M61/14 ,  F02F11/00

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

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.

公开(公告)号：US20230008602A1

公开(公告)日：2023-01-12

申请号：US17785528

申请日：2021-03-08

Applicant: KUBOTA Corporation

Inventor： Akira TAMURA ,  Kensuke FUJITA ,  Hiroki OSO ,  Yasushi KOBAYASHI ,  Shingo MATSUNOBU ,  Mitsugu OKUDA

IPC: F02F1/24 ,  F02M55/02

Abstract: To provide an engine head structure for “omission or shortening a fuel pipe that withstands a high pressure”, “simplification or omission of a support bracket for a fuel accumulator and/or a fuel injection device”, “reduction of the number of parts” by devising a fuel accumulator and a support structure therefor, and the like. An engine head structure has a support bracket for mounting a fuel accumulator including a joining portion with a fuel injection device on a cylinder head, is disposed on a side of the fuel injection device or between adjacent fuel injection devices. The support bracket includes a member having a mounting portion on which the fuel accumulator is placed and mounted, a mounting leg portion extending from the mounting portion and mounted on the cylinder head, and an aligning leg portion extending from the mounting portion for positioning the support bracket with respect to the cylinder head.