公开(公告)号：US20250020088A1

公开(公告)日：2025-01-16

申请号：US18717543

申请日：2022-08-29

Applicant: KUBOTA CORPORATION

Inventor： Yasushi KOBAYASHI ,  Naotaro NAGAI ,  Rina KANEKO ,  Masanari TENNOMI ,  Naruhiro MATSUO

IPC: F02D41/40 ,  F02B3/06 ,  F02B19/08

Abstract: A diesel engine 1 includes: an injector 15; a control device which controls an injection timing of fuel 81 injected from the injector 15; and exhaust circulating means. The control device controls the injection timing of main injection and pre-injection performed prior to the main injection and executes control such that, by ensuring a premixing period of the pre-injection from start of the pre-injection until ignition of an air-fuel mixture of the fuel 81 injected by the pre-injection and the air AR, a homogenous and lean premixed air-fuel mixture is generated in the auxiliary combustion chamber 13 by the fuel 81 injected by the pre-injection and air AR, and the premixing period of the main injection from the start of the main injection until ignition of the air-fuel mixture of the fuel 81 injected by the main injection and the air AR is ensured.

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).