公开(公告)号：US11815005B2

公开(公告)日：2023-11-14

申请号：US17798827

申请日：2021-01-14

Applicant: Bayerische Motoren Werke Aktiengesellschaft

Inventor： Rainer Drees

IPC: F02B19/16 ,  H01T13/52 ,  H01T13/22 ,  F02B19/12 ,  H01T13/46 ,  H01T13/54

CPC classification number: F02B19/12 ,  F02B19/165 ,  H01T13/462 ,  H01T13/52 ,  H01T13/54 ,  H01T13/22

Abstract: A passive prechamber spark plug for use in a combustion chamber of a vehicle engine includes an upper prechamber having an upper opening where the upper prechamber is connectable to the combustion chamber via the upper opening. An air ignition spark is formable via an upper air spark gap. A central electrode is disposed in an upper region of the upper prechamber where a base of the upper prechamber opposite the upper region is an insulator. An electrically conductive element or a slot is guided by the insulator continuously from the upper prechamber into a lower region under the base and the lower region is either a lower prechamber or is arrangeable directly in the combustion chamber. An earth electrode is disposed in the lower region such that a lower air-surface gap spark gap is formed between the earth electrode and the electrically conductive element or the slot.

公开(公告)号：US20230318265A1

公开(公告)日：2023-10-05

申请号：US18127488

申请日：2023-03-28

Applicant: FEDRRAL-MOGUL IGNITION GMBH

Inventor： Daniel Koenig

IPC: H01T13/46 ,  H01T21/02 ,  H01T13/39 ,  H01T13/32

CPC classification number: H01T13/462 ,  H01T21/02 ,  H01T13/39 ,  H01T13/32

Abstract: A spark plug electrode with one or more electrode tip(s) formed on one or more electrode base(s) using an additive manufacturing process, such as a powder bed fusion technique, such that each electrode tip overhangs an edge of a corresponding electrode base. The spark plug electrode may be a center electrode, a ground electrode, or an annular ground electrode and can be provided according to a number of different configurations. Each electrode tip includes a precious metal-based material, such as an iridium- or platinum-based alloy, and a plurality of laser deposition layers, and each electrode tip can be secured to an electrode base with a weldless joint. An additive manufacturing process is also provided.

公开(公告)号：US11569639B2

公开(公告)日：2023-01-31

申请号：US17538992

申请日：2021-11-30

Applicant: Caterpillar Inc.

Inventor： James Jay Cress

IPC: H01T13/20 ,  H01T13/39 ,  H01T13/40 ,  H01T13/54 ,  H01T13/46

Abstract: A spark plug includes a central electrode member and an outer electrode member. The central electrode member includes a central base and a plurality of electrode prongs extending in an axial direction from the central base. The outer electrode member surrounds the central electrode member. The outer electrode member includes a wall that is radially spaced from the plurality of electrode prongs to allow a series of electric arcs to form between the wall and the plurality of electrode prongs. The outer electrode member and the central electrode member are sized and positioned relative to one another such that a first rate of wear of the outer electrode member, along a longitudinal axis of the spark plug, is substantially equal to a second rate of wear of the central electrode member along the longitudinal axis.

公开(公告)号：US11280278B2

公开(公告)日：2022-03-22

申请号：US16920861

申请日：2020-07-06

Applicant: Ford Global Technologies, LLC

Inventor： Thomas G. Leone ,  Michael Damian Czekala

IPC: F02B19/12 ,  F02B19/18 ,  F02D35/02 ,  H01T13/46 ,  F02P5/153 ,  F02P5/15 ,  F02D13/02 ,  F02D41/00 ,  F02D41/04

Abstract: Methods and systems are provided for operating a cylinder with a series gap igniter coupled to an ion sensing module. In one example, a method may include determining a location of an initial combustion in a cylinder from a series gap igniter based on a pressure rise rate in the cylinder, the ignition spark initiating combustion in the cylinder; and adjusting at least one setting of the cylinder based on the determined location. In this way, combustion stability and efficiency may be increased without increasing a cost and complexity of the engine.

公开(公告)号：US20200373742A1

公开(公告)日：2020-11-26

申请号：US16722162

申请日：2019-12-20

Applicant: Knite, Inc.

Inventor： Artur P. Suckewer

IPC: H01T13/52 ,  F02P9/00 ,  H01T13/34 ,  H01T13/46 ,  H01T13/22 ,  F02P23/04

Abstract: An igniter having at least two electrodes spaced from each other by an insulating member having a substantially continuous surface along a path between the electrodes. The electrodes extend substantially parallel to each other for a distance both above and below said surface. The insulating member has a channel (recess) for receiving at least a portion of a length of at least one of said electrodes below and to said surface of the insulating member. The surface of the insulating member may preferably be augmented with a conductivity enhancing agent. The insulating member and electrodes are configured so that an electric field between the electrodes at said surface does not have abrupt field intensity changes, whereby when a potential is applied to the electrodes sufficient to cause breakdown to occur between the electrodes, discharge occurs at said surface of the insulating member to define a plasma initiation region.

公开(公告)号：US20200235552A1

公开(公告)日：2020-07-23

申请号：US16304056

申请日：2017-04-11

Applicant: Rosenberger Hochfrequenztechnik GmbH & Co. KG

Inventor： Martin FUCHS ,  Michael WOLLITZER ,  Gunnar ARMBRECHT ,  Peter AWAKOWICZ ,  Thomas MUSCH ,  Sven GRÖGER ,  Andre BERGNER ,  Gordon NOTZON ,  Marcel VAN DELDEN

IPC: H01T13/46 ,  H01T13/22

Abstract: The invention relates to a spark plug (100) for an internal combustion engine, in particular having a high frequency ignition system, having a central electrode (28; 128), a ground electrode (12; 112) and an electrical insulator (18; 118) arranged between the central electrode (28; 128) and the ground electrode (12; 112), wherein a central electrode connecting point (26; 126) for electrically connecting the central electrode (28; 128) to an ignition system is provided on the insulator (18; 118), wherein the central electrode (28; 128) and the ground electrode (12; 112) project beyond the insulator (18; 118) at an axial end (114) of the spark plug (100) and each form, with a part projecting axially beyond the insulator (18; 118), a central electrode end (140) and a ground electrode end (142), wherein the central electrode end (140) and the ground electrode end (142) are arranged and embodied in such a way that an axial region (170) of a gap (146) is formed between them in an axial direction, wherein the axial region (170) of the gap (146) is spaced apart from the insulator (18; 118), wherein at least one additional electrode (150) is provided which projects beyond the insulator (118) at the axial end (114) of the spark plug (100) and forms, with a part which projects axially beyond the insulator (118), an additional electrode end (154). In this case the additional electrode (150) is arranged electrically insulated from the ground electrode (112) and the central electrode (128), on the spark plug (100), wherein the additional electrode end (154) projects into the axial region (170) of the gap (146) between the central electrode end (140) and the ground electrode end (142) or is arranged into a region (170) of the gap (146) which is radially adjacent to the axial region (170) of the gap (146), and as a result divides the gap (146) into two ignition spark end gaps (156, 166).

公开(公告)号：US10550820B2

公开(公告)日：2020-02-04

申请号：US14028516

申请日：2013-09-16

Applicant: Prometheus Applied Technologies, LLC

Inventor： Luigi P. Tozzi ,  David Thomas Lepley ,  Maria Emmanuella Sotiropoulou ,  Joseph Martin Lepley ,  Steven B. Pirko

IPC: F02P9/00 ,  F02P13/00 ,  H01T13/20 ,  H01T13/50 ,  H01T13/46 ,  F02D35/02 ,  F02B19/00 ,  F02B19/12

Abstract: In certain embodiments, a time-varying spark current ignition system can be applied to improve spark plug ignitability performance and durability as compared to conventional spark ignition systems. Two performance parameters of interest are spark plug life (durability) and spark plug ignitability. In certain embodiments, spark plug life can be extended by applying a spark current amplitude as low as possible without causing quenching of the flame kernel while it is traveling within an electrode gap and/or by applying spark current of a long enough duration to allow the spark/flame kernel to clear a spark plug gap. In certain embodiments, ignitability can be improved by applying a high enough spark current amplitude to sustain the flame kernel once outside the spark plug gap and/or by applying a spark current for long enough to sustain the flame kernel once outside the spark plug gap.

公开(公告)号：US10333281B2

公开(公告)日：2019-06-25

申请号：US16028569

申请日：2018-07-06

Applicant: DENSO CORPORATION

Inventor： Kazumi Nakano ,  Masamichi Shibata

IPC: H01T13/32 ,  H01T13/14 ,  H01T13/46

Abstract: A spark plug is provided which includes a cylindrical metal shell, a cylindrical porcelain insulator retained in the metal shell, a center electrode, and a ground electrode. The center electrode is disposed in the insulator with a head protruding outside a front end surface of the insulator. The ground electrode is joined to the metal shell and includes a gap-defining portion which faces a side surface of a side surface of the center electrode to define a spark gap and also faces the front end surface of the porcelain insulator to define a semi-surface discharge gap for burning off, for example, carbon deposits on the front end surface of the insulator.

公开(公告)号：US20190148920A1

公开(公告)日：2019-05-16

申请号：US15721820

申请日：2017-09-30

Applicant: LOTUS SPARK PLUGS TECHNOLOGY (HANGZHOU) CO. LTD

Inventor： Helin SHEN ,  Jiangtao FENG ,  Shiyang YANG ,  Lwee Chek YAN ,  Kee Foo OW

IPC: H01T13/46

Abstract: The present invention relates to a series clearance multi-point discharging spark plug for a spark ignition engine, including a wiring screw. The wiring screw is arranged in an insulator. A central electrode is arranged in a tip of the insulator. A built-in damping resistor is arranged between the central electrode and the wiring screw. A ceramic multi-point discharging ignition table fitted with the insulator is arranged at a bottom of the insulator. A cavity assembly is formed between the ceramic multi-point discharging ignition table and the insulator. An outer wall at an upper end of the ceramic multi-point discharging ignition table is fastened to the shell. An ignition electrode assembly is arranged at the bottom of the ceramic multi-point discharging ignition table. The series clearance multi-point discharging spark plug increases temperature and pressure of mixed gas during ignition, thereby improving ignition performance, shortening combustion duration and improving engine performance.

公开(公告)号：US10177538B2

公开(公告)日：2019-01-08

申请号：US14889570

申请日：2014-05-08

Applicant: Robert Bosch GmbH

Inventor： Hartwig Senftleben ,  Manfred Vogel

IPC: H01T13/02 ,  H01T13/46 ,  H01T13/42 ,  F02P15/08 ,  H01T13/24

Abstract: An ignition device for a combustion chamber of an internal combustion engine includes a first electrode and a second electrode, which is movable with the aid of an actuator. The ignition device is configured to generate a first ignition spark when a contact between the first and second electrode is interrupted. To accomplish this, the second electrode is moved away from the first electrode. A third electrode is also provided, which is spaced apart from the first electrode. With the aid of the third electrode, a second ignition spark can be generated by moving the second electrode away from the other two electrodes. With the three electrodes, the ignition unit is configured to allow the two ignition sparks to pass through a volume formed between the electrodes in the direction transverse to the longitudinal extension of the ignition sparks in the course of the movement of the second electrode.