WO2016023127A1 - Improved spark plug - Google Patents
Improved spark plug Download PDFInfo
- Publication number
- WO2016023127A1 WO2016023127A1 PCT/CA2015/050769 CA2015050769W WO2016023127A1 WO 2016023127 A1 WO2016023127 A1 WO 2016023127A1 CA 2015050769 W CA2015050769 W CA 2015050769W WO 2016023127 A1 WO2016023127 A1 WO 2016023127A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insulator
- extends
- spark plug
- lobes
- positive electrode
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/46—Sparking plugs having two or more spark gaps
- H01T13/467—Sparking plugs having two or more spark gaps in parallel connection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/32—Sparking plugs characterised by features of the electrodes or insulation characterised by features of the earthed electrode
Definitions
- the present invention relates to spark-ignited internal combustion engi
- a body which defines a longitudinal axis is provided.
- the body has, adjacent one end thereof, a metal ring which is orientated coaxially with the longitudinal axis.
- the body further includes a metal tube which: is orientated coaxially with the longitudinal axis; extends from the ring towards the other end of the body; and is externally-threaded for engagement in a corresponding threaded bore in an engine block in use.
- a porcelain insulator also forms part of the body. The insulator has a portion disposed inside the tube.
- This portion extends axially, from inside the tube, beyond the ring, and has an elongate void extending axially therethrough.
- An elongate positive electrode occupies the void and extends axially beyond the insulator to a terminus which defines the one end of the body.
- Conventional spark plugs also include an electrode leg.
- the electrode leg has two arms transversely connected to one another, with one arm extending axially from the ring and beyond the electrode and the other arm extending radially inwardly from the one arm so as to terminate in an end portion that is axially-spaced from the terminus.
- the spark gap in this conventional plug is the space defined between the positive electrode and the electrode leg.
- a spark plug forms one aspect of the invention.
- the plug which is for use with an engine block/cylinder head having a threaded bore and is also for use with a spark plug wrench and an ignition wire, comprises a nut portion, a coupling portion, an insulator portion, a positive electrode and a ground electrode.
- the nut portion is adapted to be turned by the wrench.
- the coupling portion extends from the nut portion and is adapted to receive the ignition wire.
- the insulator portion extends from the nut portion and away from the coupling portion to an end.
- the positive electrode extends through and beyond the end of the insulator portion.
- the ground electrode includes a tubular metal portion and a cap portion to which the tubular portion extends.
- the tubular metal portion extends from the nut portion in circumferentially surrounding relation to the insulator portion; terminates such that a portion of the insulator portion extends beyond the tubular metal portion; is orientated coaxially about and defines a longitudinal axis; and is externally-threaded for engagement in the threaded bore in said engine block in use.
- the cap portion is disposed in spaced relation to the insulator portion and defines a void having: a central portion into which the positive electrode extends; an annular channel surrounding the central portion; and a plurality of lobes, each being positioned with respect to the central portion in a manner analogous to the placement of the planet gears with respect to the sun gear in a planetary gear.
- the cap also has a central surface that is axially spaced from that portion of the insulator that protrudes beyond the tubular metal portion; and a convex surface that surrounds and extends to the central surface.
- the central surface can be orientated substantially normally to the longitudinal axis and substantially coplanar with the end of the positive electrode.
- the plurality of lobes can consist of three to seven lobes.
- R1 is the radius of each planet gear
- R2 is the distance from the axis of each planet gear to the axis of the sun gear R3 is the outer radius of the ground electrode
- R4 is the outer radius of the annular channel
- R1 : R2: R3: R4: R5 can be about 0.12: 0.305 : 0.475: 0.25
- the plurality of lobes can consist of seven lobes.
- the cap portion can have radially inwardly disposed fingers which separate the lobes from one another, each finger having a terminus to which said each finger extends, the thickness of the finger at the terminus as measured in the longitudinal direction being substantially equal to the length of that portion of the positive electrode that extends beyond the insulation.
- FIG. 1 is a perspective view of a spark plug according to an
- FIG. 2 is an enlarged view of encircled area 2 of FIG. 1
- FIG. 3 is an end view of the structure of FIG. 1 ;
- FIG. 4 is a side view of the structure of FIG. 1 ;
- FIG. 5 is a view along 5-5 of FIG. 4.
- FIG. 6 is a view similar to FIG. 5, illustrative of an exemplary method of manufacture
- FIG. 7 is a perspective view of encircled area 7 of FIG. 6;
- FIG. 8 is a plan view of the structure of FIG. 7;
- FIG. 9 is a view along 9-9 of FIG. 8.
- FIG. 10 is a side view of the structure of FIG. 7.
- the spark plug 20 according to the exemplary embodiment shown in FIGS. 1 -4 is for use with an engine block/cylinder head having a threaded bore and also for use with a spark plug wrench and an ignition wire, all as is
- the plug 20 also comprises, as is conventional, a nut portion 22, a coupling portion 24, an insulator portion 26, a positive electrode 28 and a ground electrode 30.
- the nut portion 22 is adapted to be turned by the wrench; the coupling portion 24 extends from the nut portion 22 and is adapted to receive the ignition wire; the insulator portion 26 extends from the nut portion 22 and away from the coupling portion 24 to an end; the positive electrode 28 extends through and beyond the end of the insulator portion 26.
- the ground electrode 30 includes a tubular metal portion 32 which: extends from the nut portion 22 in
- • is disposed in spaced relation to the insulator 26 and defines a void 36 having: a central portion 38 into which the positive electrode 28 extends; an annular channel 40 surrounding central portion 38; and a plurality of lobes 42, each being positioned with respect to the central portion 38 in a manner analogous to the placement of the planet gears with respect to the sun gear in a planetary gear.
- each finger 44 has a terminus to which said each finger extends, the thickness X1 of the finger at the terminus as measured in the longitudinal direction being substantially equal to the length X2 of that portion of the positive electrode that extends beyond the insulation
- insulator 26 that protrudes beyond the tubular portion 32 and is orientated substantially normally to the longitudinal axis X-X and substantially coplanar with the end of the positive electrode 28; and (ii) a convex surface 48 that surrounds and extends from the tubular metal portion 32 to the central surface 46.
- the geometry of the cap portion is such that if R1 is the radius of each planet gear, R2 is the distance from the axis of each planet gear to the axis of the sun gear, R3 is the outer radius of the ground electrode and R4 is the outer radius of the annular channel, then R1 : R2: R3: R4: R5 is about 0.12: 0.305 : 0.475: 0.25
- the spark plug of the exemplary embodiment has proven to be of substantial advantage in numerous tests that have been carried out.
- Table 1 shows dynamometer tests carried out using a CRA Super Series Template 360 Chev Racing Engine with a 9:1 compression. Timing was set at 34. The carburetor used was a Holly 390 with 77 jets. Oil used was 15/40 viscosity. Fuel octane: 1 10. Load factor was set at 1 .21 . The left columns show developed torque and HP at RPM values between 5500 and 8000 using a set of new, standard Autolite AR3932X plugs. The middle columns shows the same data set for the same plugs, modified with the inventive cap portion. The right columns shown the torque and horsepower gains, which manifest at all measured speeds. OE Autolite AR473 Modified AR473 Gain
- Table 2 shows dynamometer tests carried out using a NASCAR-approved, NCATS Series Restricted 1 1/8" engine with 10: 1 compression. Timing was set at 30. The carburetor used was a Holly 390 with 64/64 jets. Oil used was 15/40 viscosity. Fuel octane: 94. Load factor was set at 1.21 . The left columns show developed torque and HP at RPM values between 4500 and 6500 using a set of new, standard Autolite AR473 plugs. The middle columns show the same data set for the same plugs, modified with the inventive cap portion. The right columns shown the torque and horsepower gains, which manifest all at all measured speeds. Autolite AR3932X modified AR3932X Gains
- Table 3 shows dynamometer tests carried out using a Chevy Big Block at 12:1 Compression. Timing was set at 32. The carburetor used was a Holly 850 with 77 jets Oil used was 15/40 viscosity. Fuel octane: 1 10. Load factor was set at 0.77. The left columns show developed torque and HP at RPM values between 4500 and 7000 using a set of new, standard Autolite AR3932X plugs. The middle columns show the same data set for the same plugs, modified with the inventive cap portion. The right columns shown the torque and horsepower gains, which manifest at all but 5500-5700 RPM. Autolite AR3932X modified AR3932X Gains
- Table 4 shows dynamometer tests carried out using a Chevy Big Block at 12:1 Compression, .045 gap. Timing was set at 32. The carburetor used was a Holly 850 with 77 jets. Oil used was 15/40 viscosity. Fuel octane: 1 10. Load factor was set at 0.77. The left columns show developed torque and HP at RPM values between 4500 and 7000 using a set of new, standard Autolite AR3932X plugs. The middle columns show the same data set for the same plugs, modified with the inventive cap portion. The right columns shown the torque and horsepower gains, which manifest at all but 5500-5800 RPM. HORSE POWER
- Tables 5 and 6 show dynamometer tests for a Chevy Big Block. Timing was set at 32. The carburetor used was a Holly 850 with 77/77 jets. Oil used was 15/40 viscosity. Fuel octane: 1 10. Load factor was set at 0.77.
- Table 5 the three left columns show developed horsepower at RPM between 4500 and 7000 using a set of new AR3932X plugs. The three right columns show the same data for the same plugs, modified with the inventive cap portion. Horsepower gains were obtained at all speeds but for 5600 RPM .
- Table 6 the three left columns show developed torque at RPM between 4500 and 7000 using a set of new AR3932X plugs. The three right columns show the same data for the same plugs, modified with the inventive cap portion.
- FIGS. 7-10 An exemplary ring is shown in FIGS. 7-10. This ring is produced from 304 2B stainless steel and is dimensioned as follows:
- the plurality of lobes can consist of three to seven lobes.
Landscapes
- Spark Plugs (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020177006870A KR20170041895A (en) | 2014-08-15 | 2015-08-13 | Improved spark plug |
CN201580050767.8A CN106797108A (en) | 2014-08-15 | 2015-08-13 | Improved spark plug |
EP15831542.4A EP3180824A4 (en) | 2014-08-15 | 2015-08-13 | Improved spark plug |
JP2017508032A JP2017529656A (en) | 2014-08-15 | 2015-08-13 | Improved spark plug |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2859488A CA2859488A1 (en) | 2014-08-15 | 2014-08-15 | Improved spark plug |
CA2,859,488 | 2014-08-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016023127A1 true WO2016023127A1 (en) | 2016-02-18 |
Family
ID=55303736
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2015/050769 WO2016023127A1 (en) | 2014-08-15 | 2015-08-13 | Improved spark plug |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3180824A4 (en) |
JP (1) | JP2017529656A (en) |
KR (1) | KR20170041895A (en) |
CN (1) | CN106797108A (en) |
CA (1) | CA2859488A1 (en) |
WO (1) | WO2016023127A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021157302A1 (en) * | 2020-02-05 | 2021-08-12 | 株式会社豊田自動織機 | Combustor |
JP7424216B2 (en) | 2020-06-10 | 2024-01-30 | 株式会社デンソー | Spark plugs for internal combustion engines and internal combustion engines |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090241321A1 (en) * | 2008-01-25 | 2009-10-01 | Mark Farrell | Spark Plug Construction |
WO2013010246A1 (en) * | 2011-07-19 | 2013-01-24 | Nano Spark Inc. | Spark plug construction |
US20140354137A1 (en) * | 2011-07-19 | 2014-12-04 | Nano Spark Inc. | Spark plug |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2513266Y (en) * | 2001-12-20 | 2002-09-25 | 张琦 | Circular tooth shape multiple pole sparking plug |
-
2014
- 2014-08-15 CA CA2859488A patent/CA2859488A1/en not_active Abandoned
-
2015
- 2015-08-13 WO PCT/CA2015/050769 patent/WO2016023127A1/en active Application Filing
- 2015-08-13 CN CN201580050767.8A patent/CN106797108A/en active Pending
- 2015-08-13 JP JP2017508032A patent/JP2017529656A/en active Pending
- 2015-08-13 KR KR1020177006870A patent/KR20170041895A/en unknown
- 2015-08-13 EP EP15831542.4A patent/EP3180824A4/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090241321A1 (en) * | 2008-01-25 | 2009-10-01 | Mark Farrell | Spark Plug Construction |
WO2013010246A1 (en) * | 2011-07-19 | 2013-01-24 | Nano Spark Inc. | Spark plug construction |
US20140354137A1 (en) * | 2011-07-19 | 2014-12-04 | Nano Spark Inc. | Spark plug |
Non-Patent Citations (1)
Title |
---|
See also references of EP3180824A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR20170041895A (en) | 2017-04-17 |
EP3180824A4 (en) | 2018-03-21 |
JP2017529656A (en) | 2017-10-05 |
CN106797108A (en) | 2017-05-31 |
EP3180824A1 (en) | 2017-06-21 |
CA2859488A1 (en) | 2016-02-15 |
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