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：US20230160353A1

公开(公告)日：2023-05-25

申请号：US17997492

申请日：2021-04-22

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Klaus WERANECK ,  Richard PIRKL ,  Norbert SCHOEFBAENKER ,  Josef ASPELMAYR

IPC: F02D41/20 ,  F02M51/06

CPC classification number: F02D41/20 ,  F02M51/061 ,  F02D2041/2055

Abstract: A device comprises: an injector for injecting fuel into an engine combustion chamber, a switch formed by an injector housing and an injector nozzle needle and which changes its switching state depending on a closed or open state of the injector, an input line for supplying energy to an actuating element which adjusts the nozzle needle in its two states, an output line for conducting energy away from the actuating element, and an evaluation unit for detecting the switching state of the switch, wherein a first switch contact of the switch is connected to an electrical input line of the injector, a second switch contact of the switch is connected to ground, and the evaluation unit is configured to carry out a signal measurementon the input line and/or an output line to conclude a switch state.

公开(公告)号：US20210388802A1

公开(公告)日：2021-12-16

申请号：US17286419

申请日：2019-10-16

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Norbert SCHOEFBAENKER ,  Verena KOEGEL ,  Richard PIRKL ,  Bernhard KOPP

IPC: F02M61/10 ,  F02M61/18 ,  F02M51/06 ,  F02M51/00

Abstract: An injector for injecting fuel including an injector housing, a movable nozzle needle with a nozzle needle tip arranged in the injector housing, and a nozzle needle seat for receiving the nozzle needle tip. A contact pairing of the nozzle needle and the nozzle needle seat here represents a mechanical switch that adopts a closed state upon contact of the nozzle needle tip with the nozzle needle seat and an open state upon interruption of the contact. Provision is additionally made that the injector has an input line and an output line for controlling movement of the nozzle needle, the switch has a first connector connected to the input line and a second connector connected to the injector housing, and a resistor connected between the first connector of the switch and the input line.

公开(公告)号：US20210317807A1

公开(公告)日：2021-10-14

申请号：US15734547

申请日：2019-06-04

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Klaus LICHTINGER ,  Richard PIRKL ,  Alexander PREIS

IPC: F02M61/16 ,  B23K26/00 ,  B23K26/382 ,  F02M61/18

Abstract: The invention relates to a method for producing a nozzle, in which an injection orifice of the nozzle for dispensing fuel is produced by means of laser drilling, and a cavity is formed in the nozzle along the longitudinal expansion thereof. The method is characterised in that the cavity formed in the injector is produced after the injection orifice has been produced.

公开(公告)号：US20250012240A1

公开(公告)日：2025-01-09

申请号：US18711522

申请日：2022-11-21

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Mario D'ONOFRIO ,  Giovanni CORBINELLI ,  Francois MASSON ,  Richard PIRKL

IPC: F02M21/02 ,  F02M55/04

Abstract: The present invention relates to a device for direct injection of a gaseous fuel, in particular hydrogen, which device comprises: a pressure-control unit which is designed to convert a supplied variable pressure level of the gaseous fuel into a fixed constant output pressure level; a distributor unit which is connected to at least one injector for direct injection of the gaseous fuel, which has been guided through the pressure-control unit, into a combustion chamber; and a fluid connection between the pressure-control unit and the distributor unit in order to guide the gaseous fuel at a constant output pressure downstream towards the distributor unit. The device is characterized in that a flow-control valve is disposed along the fluid connection and designed to adjust the constant output pressure level of the gaseous fuel to a desired target pressure not exceeding the output pressure level.

公开(公告)号：US20230134998A1

公开(公告)日：2023-05-04

申请号：US17907637

申请日：2021-03-24

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Norbert SCHOEFBAENKER ,  Richard PIRKL ,  Klaus WERANECK

IPC: F02M61/16 ,  F02M61/12

Abstract: A nozzle needle for a fuel injector, the nozzle needle including an elongated nozzle needle main body which has, at one of its two long ends, a nozzle needle tip for selectively closing an injection opening of the fuel injector. The nozzle needle also including a plastic and/or ceramic sleeve for enclosing the nozzle needle main body peripherally along a longitudinal region of the nozzle needle, which longitudinal region is spaced apart from the nozzle needle tip.

公开(公告)号：US20220186698A1

公开(公告)日：2022-06-16

申请号：US17427898

申请日：2020-02-11

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Richard PIRKL ,  Razvan-Sorin STINGHE ,  Martin SEIDL

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

Abstract: The injector unit according to the disclosure comprises a seat plate with a through opening extending through the seat plate, an armature element which can be placed onto the seat plate, in order to close the through opening, a spring element pushing the armature element in the direction of the seat plate, in order to close the through opening, an electromagnet designed to load the armature element with a force, in order to lift the armature element from the seat plate, and a stop for limiting a stroke of the armature element in a state in which it is lifted from the seat plate. The injector unit is characterized by a control unit designed to reduce an actuating signal of the electromagnet for lifting the armature element from the seat plate before the armature element contacts the stop for the first time after being lifted from the seat plate.

公开(公告)号：US20200256297A1

公开(公告)日：2020-08-13

申请号：US16632526

申请日：2018-07-20

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Norbert SCHOEFBAENKER ,  Richard PIRKL ,  Lorand D'OUVENOU

IPC: F02M51/06 ,  F02M61/14 ,  F02M51/00 ,  F02M55/02 ,  F02M61/10

Abstract: The invention relates to a device for sensing the state of an injector, comprising an injector for injecting fuel into an engine combustion chamber, a switch, which is designed to change the switching state thereof in accordance with the state of the injector, and an evaluating unit for sensing the switching state of the switch, wherein a first switch contact of the switch is connected to an electrical input line of the injector, a second switch contact of the switch is connected to ground, and the evaluating unit is designed to carry out a first current measurement for a current flowing into the injector and into the switch and a second current measurement for the current flowing into the injector.

公开(公告)号：US20240077051A1

公开(公告)日：2024-03-07

申请号：US18262356

申请日：2022-02-07

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

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

IPC: F02M21/02

CPC classification number: F02M21/0263 ,  F02M21/0206 ,  F02M21/0254 ,  F02M21/0275 ,  F02M21/0296

Abstract: The present invention relates to an injector for injecting gas, in particular hydrogen, preferably for directly injecting hydrogen, comprising an injector housing for holding injector components, a valve needle movably arranged along its longitudinal axis in the injector housing and configured to selectively close or release an injection opening for the flow of hydrogen therethrough, and a valve, preferably a solenoid valve, which is adapted to transfer the valve needle into a closing or releasing state by a movement along its longitudinal axis. The injector is characterized in that the valve needle is a hollow needle adapted to pass a gas, in particular hydrogen, flowing through the injection port through the interior of the hollow needle.

公开(公告)号：US20230146257A1

公开(公告)日：2023-05-11

申请号：US17907524

申请日：2021-03-25

Applicant: LIEBHERR-COMPONENTS DEGGENDORF GMBH

Inventor： Norbert SCHOEFBAENKER ,  Richard PIRKL ,  Klaus WERANECK ,  Carina RAUSCHER

IPC: F02M47/02 ,  F02M65/00 ,  F02M51/06 ,  F02M61/16 ,  F02M61/18

CPC classification number: F02M47/027 ,  F02M65/005 ,  F02M51/0671 ,  F02M61/166 ,  F02M61/1886 ,  F02M2200/9007 ,  F02M61/168

Abstract: A needle stroke switch and a fuel injector having such a switch, the needle stroke switch including a seat plate having a plate-like main body and a passage connecting the two planar sides of the plate-like main body, an anchor element which can be lifted off from the passage in the seat plate, and a control valve which is arranged on the side of the seat plate opposite the anchor element and is designed to interact with a nozzle needle. The seat plate is electrically isolated from a surrounding injector housing and an electrical connection to the injector housing is possible only via the nozzle needle which interacts with the seat plate. Furthermore, the needle stroke switch is characterised in that at least one ceramic and/or plastic part is provided which contacts the seat plate in order to isolate the seat plate from the surrounding injector housing.