公开(公告)号：US20250020096A1

公开(公告)日：2025-01-16

申请号：US18767031

申请日：2024-07-09

Applicant: MARELLI EUROPE S.P.A.

Inventor： Giorgio Signorelli ,  Michele Petrone ,  Stefano Petrecchia ,  Massimo Mattioli ,  Martina La Malfa ,  Francesco Zampolli ,  Nicola Mundo ,  Luca Mancini

IPC: F02M51/06 ,  F02M61/20 ,  F02M63/00

Abstract: An electromagnetic fuel injector having: a tubular support body; an injection nozzle arranged at an end of the support body; an injection valve coupled to the injection nozzle; a plunger, which is movable, so as to adjust the fuel flow through the injection nozzle, between a closed position and an open position of the injection valve; an electromagnetic actuator provided with a main electromagnet configured, when it is activated, to apply a force to the plunger, which pushes the plunger towards the open position of the injection valve and with a secondary electromagnet configured, when it is activated, to apply a force to the plunger, which pushes the plunger towards the closed position of the injection valve; and a closing spring configured to push the plunger towards the closed position of the injection valve.

公开(公告)号：US11692520B2

公开(公告)日：2023-07-04

申请号：US16990398

申请日：2020-08-11

Applicant: Caterpillar Inc.

Inventor： Cory A. Brown

IPC: F02M47/02 ,  F02M51/06 ,  F02M55/00 ,  F02M61/20 ,  F02M61/04

CPC classification number: F02M51/0632 ,  F02M47/027 ,  F02M51/0628 ,  F02M55/004 ,  F02M55/008 ,  F02M61/045 ,  F02M61/20 ,  F02M2200/28

Abstract: A fuel injector includes an injector body and a valve stack within the injector body that includes a valve seat plate. The valve seat plate includes a pressure control passage for controlling fuel injection, and a valve seat positioned fluidly between the pressure control passage and a low-pressure drain. The valve seat plate includes a pressure-limiting annular groove that extends circumferentially around the valve seat and axially inward from a side of the valve seat plate where the valve seat is located. The groove enables deformation in response to pressure differences across the valve seat plate in a manner that limits stress concentrations.

公开(公告)号：US20230087694A1

公开(公告)日：2023-03-23

申请号：US17889532

申请日：2022-08-17

Applicant: ZAMA JAPAN KABUSHIKI KAISHA

Inventor： Hiroo Ubukata ,  Toshinobu Shimoyama

IPC: F02M51/06 ,  F02M37/00 ,  F02M61/20

Abstract: A method to prevent generation of impact noise caused by an armature contacting a stopper due to a return spring and damage of the armature and a stopper without adding a part. Excitation of an electromagnetic coil 4 causes an armature 9 at a standby position to move in a plunger 7 direction so as to move the plunger 7 inserted in a pressurizing chamber 3 in a tip end direction against a return spring 8 to a level such that fuel is not injected from an injection nozzle 2. Fuel supplied from a fuel tank to the pressurizing chamber 3 through a fuel intake pipe 10 and inlet check valve 11 is pressurized and vapor included in the fuel inside the pressurizing chamber 3 is discharged to a fuel return pipeline 14 through a spill valve 12 and return passage 13. Excitation of the electromagnetic coil 4 is stopped, and then the electromagnetic coil 4 is re-excited prior to the armature 9 and plunger 7 reaching the standby position due to the return spring 8, such that the return speed of the armature 9 is reduced and an impact when the armature 9 contacts a stopper 15 is mitigated.

公开(公告)号：US20220397084A1

公开(公告)日：2022-12-15

申请号：US17304127

申请日：2021-06-15

Applicant: Caterpillar Inc.

Inventor： Cory Andrew BROWN ,  Adam L. STECKLEIN

IPC: F02M61/10 ,  F02M61/20

Abstract: A fuel injector includes a needle valve including a spring-retaining section and a guide section that is adjacent to the spring-retaining section. The spring-retaining section includes an elongated portion and a flange that are together configured to support a spring assembly. The guide section includes a plurality of constricted portions alternatingly arranged with a plurality of expanded portions to define an undulating shape of the guide section. Each of the plurality of expanded portions includes a plurality of indentations to permit fuel to travel therealong to exit an outlet of the fuel injector. The guide section has a length that is substantially equal to a length of the spring-retaining section.

公开(公告)号：US20220381212A1

公开(公告)日：2022-12-01

申请号：US17825806

申请日：2022-05-26

Applicant: Stanadyne LLC

Inventor： Michael Hornby

IPC: F02M51/06 ,  F02M61/20 ,  F02M21/02

Abstract: An electromagnetic fuel injection valve includes a coupling between an armature and the valve member that allows limited relative movement of the valve member and armature in both the opening and closing directions of the valve member. An injector body includes a non-magnetic section to focus magnetic flux and attractive force through the armature and pole. A modular power group reduces the cost of assembly and includes a plastic encapsulated coil that is protected from environmental moisture and corrosion. A valve seat incorporates a valve seal which improves fuel flow past the valve member when the fuel injection valve is in the open position.

公开(公告)号：US11231001B2

公开(公告)日：2022-01-25

申请号：US15027074

申请日：2014-09-29

Applicant: Continental Automotive GmbH

Inventor： Stefano Filippi ,  Mauro Grandi ,  Francesco Lenzi ,  Valerio Polidori

IPC: F02M61/08 ,  F02M63/00 ,  F02M45/08 ,  F02M61/20 ,  F02M61/10

Abstract: The present disclosure relates to a fuel injector for injecting fuel into a combustion engine. It may comprise a valve with a movable needle, two springs pushing the needle toward the closed position, and an actuator for opening the valve. The needle may be in a fuel reservoir of a valve body. The actuator may supply pressurized fuel to the fuel reservoir so that the fuel pressure forces the needle away from the closed position against the spring force of the first spring or the first and second springs, respectively. There may be play between the second spring and the needle when the needle is in the closed position.

公开(公告)号：US10900450B1

公开(公告)日：2021-01-26

申请号：US16531826

申请日：2019-08-05

Applicant: Caterpillar Inc. ,  Perkins Engines Company Limited

Inventor： Bobby John ,  Robert Michael Campion ,  Jonathan W. Anders

IPC: F02M63/00 ,  F02M45/08 ,  F02M61/10 ,  F02B23/06 ,  F02M61/18 ,  F02D41/40 ,  F02M61/20

Abstract: A fuel system for an internal combustion engine includes a fuel injector having a nozzle with first and second sets of spray orifices formed therein. The fuel injector also includes a first and a second outlet check movable to open and close the first and second sets of spray orifices. Spray plume ducts are supported at fixed orientations relative to a nozzle of the fuel injector, and each are oriented in-line with a center axis defined by one of the spray orifices. The spray plume ducts may be directly attached to the fuel injector or to a duct carrier mounted to an engine head.

公开(公告)号：US10883465B2

公开(公告)日：2021-01-05

申请号：US16063379

申请日：2015-12-24

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Shinya Okamoto ,  Xudong Zhang ,  Nobuaki Kobayashi ,  Takahiro Saito ,  Akihiro Yamazaki

IPC: F02M61/20 ,  F02M61/16 ,  F02M51/06 ,  F16K31/06 ,  H01F1/03 ,  H01F7/08

Abstract: A solenoid pipe is formed of a ferromagnetic material containing 15-18 mass % of Cr, an electromagnetic coil, and a valve body. The pipe includes a reform portion, having a composition in which a component of the ferromagnetic material is mixed with a component of a Ni-containing material. A ratio, e/d, of a maximum deformation, e, of an outer circumferential surface side of the reform portion of the pipe with respect to a thickness, d, of the pipe near the reform portion is 0.5 or less, and a ratio, c/d, of a maximum deformation, c, of an inner circumferential surface side of the reform portion of the pipe with respect to the thickness, d, of the pipe is 0.5 or less.

公开(公告)号：US10859051B2

公开(公告)日：2020-12-08

申请号：US16006176

申请日：2018-06-12

Applicant: DELPHI TECHNOLOGIES IP LIMITED

Inventor： Robert B. Perry

IPC: F02M61/20 ,  F02M61/16

Abstract: A fuel injector with inlet and discharge ends includes a fuel tube through which fuel is admitted to a fuel passage extending to the discharge end. A valve element reciprocates against and away from a valve seat to prevent or allow fuel discharge. A calibration tube includes first and second ends and defines a portion of the fuel passage through which fuel must pass to the discharge end, the second end defining a spring seat engaging a spring and biasing the spring against the valve element. A fuel filter filters all fuel passing to the discharge end, and provides restriction of a first magnitude. The calibration tube includes a pressure pulsation damping orifice fluidly between the fuel filter and the discharge end through which fuel must pass to the discharge end, the pressure pulsation damping orifice provides restriction of a second magnitude which is greater than the first magnitude.

公开(公告)号：US10823127B2

公开(公告)日：2020-11-03

申请号：US15921335

申请日：2018-03-14

Applicant: Ford Global Technologies, LLC

Inventor： Xiaogang Zhang

IPC: F02M61/18 ,  F02M63/00 ,  F02B17/00 ,  F02B3/02 ,  F02M61/20

Abstract: Methods and systems are provided for a fuel injector. In one example, a system may include a fuel injector having a half-annular venturi shaped outlet passage arranged between an outlet surface of the fuel injector and a half-cone shaped end portion of a nozzle. The nozzle may further comprise one or more air entraining features working in tandem with the half-annular venturi outlet passage to promote air-fuel mixing.