公开(公告)号：US20250052215A1

公开(公告)日：2025-02-13

申请号：US18720549

申请日：2022-12-13

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Martin SEIDL ,  Richard PIRKL ,  Razvan-Sorin STINGHE ,  Martin SCHMIDT ,  Lydia KAPUSTA

IPC: F02M21/02 ,  F02M47/02 ,  F02M61/18

Abstract: The invention relates to an injector for injecting fuel, preferably for injecting a gaseous fuel, in particular hydrogen, comprising a fuel supply line for introducing a highly pressurized gaseous fuel, an active valve which can be actively shut off and which is designed to close or release at least one passage on a first face of a valve plate in order to selectively release or interrupt a fluidic connection between the fuel supply line and a region which is downstream of the first face of the valve plate, and a passive valve which is arranged downstream of the valve plate and can be passively switched to a closing or releasing state as a result of different pressure ratios upstream and downstream of the passive valve.

公开(公告)号：US20240229751A1

公开(公告)日：2024-07-11

申请号：US18150282

申请日：2023-01-05

Applicant: Illinois Tool Works Inc.

Inventor： Ryan Levy

IPC: F02M47/02 ,  A61M5/32

CPC classification number: F02M47/02 ,  A61M5/32 ,  A61M5/46

Abstract: Disclosed example injection needle blowoff apparatus include: a loading surface having a first side configured to contact an injector and having a second side opposite the first side; and an adjustable blowoff nozzle adjacent the second side of the loading surface, the adjustable blowoff nozzle comprising: a gas inlet configured to be coupled to a gas supply; and a gas outlet configured to direct gas from the gas inlet towards a location of a needle of the injector, the gas outlet being adjustable to blow on the needle within a range of distances from the second side of the loading surface.

公开(公告)号：US11939932B2

公开(公告)日：2024-03-26

申请号：US18011463

申请日：2021-07-01

Applicant: VITESCO TECHNOLOGIES GMBH

Inventor： Quentin Dussardier ,  Morgan Drouyer ,  Edouard Gambier

IPC: F02D41/20 ,  F02D41/24 ,  F02M47/02 ,  F02M63/00 ,  F02M65/00

CPC classification number: F02D41/2096 ,  F02D41/2467 ,  F02M47/027 ,  F02M63/0026 ,  F02M65/001 ,  F02M65/005 ,  F02D2041/2051

Abstract: Disclosed is a method for determining a static flow rate of a piezo-electric injector of an injection system. The piezo-electric injector includes a needle and a piezo-electric actuator designed to control a valve of the injector. The injection system includes an electric generator designed to send electric current pulses to the piezo-electric actuator of the injector, and a voltage sensor designed to measure voltage values at the terminals of the piezo-electric actuator. The method includes the following steps: sending during a phase of closure of the needle of an electric current pulse such that the piezo-electric actuator is positioned in contact with the valve, without giving rise to the opening thereof; measurement of a plurality of voltage values of the piezo-electric actuator; and determining a static flow rate of the piezo-electric injector on the basis of a plurality of voltage values measured of the piezo-electric actuator.

公开(公告)号：US20230374961A1

公开(公告)日：2023-11-23

申请号：US17749904

申请日：2022-05-20

Applicant: Caterpillar Inc.

Inventor： Kenth I. Svensson ,  Russell P. Fitzgerald

IPC: F02M47/02 ,  F02M61/18 ,  F02M61/10

CPC classification number: F02M47/02 ,  F02M61/1853 ,  F02M61/1806 ,  F02M61/10 ,  F02M61/1886

Abstract: A fuel injector includes a nozzle needle movable within an injector housing and including a flow guiding tip. The flow guiding tip includes an outer ramp surface, defining, in profile, a concave curve and a fuel trajectory line tangent to the concave curve and extending through a spray orifice inlet to direct fuel into the same. Related methodology is also disclosed.

公开(公告)号：US11713740B1

公开(公告)日：2023-08-01

申请号：US17958910

申请日：2022-10-03

Applicant: HARBIN ENGINEERING UNIVERSITY

Inventor： Jianhui Zhao ,  Jingyan Chen ,  Heng Zhang ,  Shuo Chen

IPC: F02M55/04 ,  F02M63/02 ,  F02M61/10 ,  F02M47/02 ,  F02M61/16

CPC classification number: F02M55/04 ,  F02M47/027 ,  F02M61/10 ,  F02M63/0275 ,  F02M61/16 ,  F02M2200/28 ,  F02M2200/315 ,  F02M2200/40

Abstract: The present disclosure provides a high-pressure common rail fuel injector capable of achieving highly stable injection based on the throttling damping-accommodating effect in the present disclosure, comprising a fuel injector housing, a fuel pipe connector, an accumulator chamber, a fuel chamber control valve, a pressure fluctuation absorption assembly, a control valve assembly and a nozzle assembly; the accumulator chamber is installed in the fuel injector housing, and the fuel pipe connector is installed above the accumulator chamber; the fuel chamber control valve, the pressure fluctuation absorption assembly and the control valve assembly are installed in the fuel injector housing, and the nozzle assembly is arranged below the control valve assembly; and the accumulator chamber is separated into a main accumulator chamber, an auxiliary accumulator chamber and a fuel-return accumulator chamber.

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：US11608805B2

公开(公告)日：2023-03-21

申请号：US16632527

申请日：2018-07-20

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Norbert Schoefbaenker ,  Verena Koegel

IPC: F02M63/00 ,  F02M47/02

Abstract: Device for controlling an injector, including a passage space which can be closed off on one of its two sides by an armature element in order to thereby optionally separate a fluid high-pressure region from a fluid low-pressure region of the injector, a control space for applying a variable pressure to an injector component, preferably an injector needle, a valve which is arranged between another of the two sides of the passage space and the control space, a first connection which connects the high-pressure region of the injector to the passage space, and a second connection which connects the passage space to the control space, wherein the valve is configured to establish a direct connection between the high-pressure region and the control space if the pressure level in the passage space is equal to or higher than a predetermined value.

公开(公告)号：US11476028B2

公开(公告)日：2022-10-18

申请号：US17144909

申请日：2021-01-08

Applicant: Ford Global Technologies, LLC

Inventor： Mike Garrard ,  Jonathan Thombs

IPC: H01F7/18 ,  F02M47/02

Abstract: Methods and systems are provided for a solenoid actuator. In one example, a method may include adjusting a switching frequency during an activation cycle of the solenoid actuator to a lower switching frequency relative to other phases of the activation cycle.

公开(公告)号：US11225928B2

公开(公告)日：2022-01-18

申请号：US17322006

申请日：2021-05-17

Applicant: DENSO CORPORATION

Inventor： Hiroshi Kanno

IPC: F02D7/00 ,  F02D41/40 ,  F02D41/14 ,  F02M47/02 ,  F02M61/10

Abstract: A pressure detection unit detects a fuel pressure in high-pressure fuel passages. A drive control unit controls opening and closing of pressure adjusting valves based on a drive command signal output to the fuel injection valve. An acquisition unit acquires an inflection point of the fuel pressure detected by the pressure detection unit and an inclination of the fuel pressure after the inflection point appears, after an output of the drive command signal. A delay time computation unit computes a response delay time of the pressure adjusting valve with respect to the drive command signal for each of the first on-off valve and the second on-off valve based on the inflection point and the inclination acquired by the acquisition unit.

公开(公告)号：US11220980B2

公开(公告)日：2022-01-11

申请号：US16414522

申请日：2019-05-16

Applicant: Caterpillar Inc.

Inventor： Siddharth Nair ,  Manjunath Bannur Nagaraja

IPC: F02M21/02 ,  F02M55/00 ,  F02M63/00 ,  F02M63/02 ,  F02M47/02

Abstract: A fuel system includes a plurality of fuel injectors connected to a common drain conduit, and a plurality of isolation valve assemblies each positioned fluidly between the common drain conduit and one of the plurality of fuel injectors. Each isolation valve assembly includes a valve member movable between a closed position to block an injection control valve assembly in the fuel injector from the common drain conduit, and an open position, and a biaser biasing the isolation valve member toward the closed position such that fuel injectors are isolated from fluid pressure pulses produced by nozzle check actuation to limit cross-talk among the fuel injectors.