公开(公告)号：US20240011449A1

公开(公告)日：2024-01-11

申请号：US18254280

申请日：2022-02-21

Applicant: KUBOTA CORPORATION

Inventor： Yasushi KOBAYASHI ,  Shingo MATSUNOBU ,  Kiichi SUEHIRO ,  Naotaro NAGAI

IPC: F02D41/40

CPC classification number: F02D41/402

Abstract: Provided is an injector control device which is capable of setting a preceding injection amount to a fuel injection amount that is less than a main injection amount, while suppressing situations where preceding injections executed prior to a main injection in multi-stage injection are eliminated.
An injector control device 2 includes: an injection amount setting unit 211 that sets, as a total injection amount, a total of fuel injection amounts in multi-stage injection in a single cycle, and sets, as a preceding injection amount, a fuel injection amount in a preceding injection executed prior to a main injection in the multi-stage injection; an energization period setting unit 212 that sets an energization period of an injector 31 based on the fuel injection amounts set by the injection amount setting unit 211; and an injector driving unit 213 that controls driving of the injector 31 based on the energization period set by the energization period setting unit 212. The injection amount setting unit 211 sets a fuel injection amount that is a predetermined percentage of the total injection amount as the preceding injection amount.

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：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.