EP1414121A1 - Zündkerze - Google Patents

Zündkerze Download PDF

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Publication number
EP1414121A1
EP1414121A1 EP20020023825 EP02023825A EP1414121A1 EP 1414121 A1 EP1414121 A1 EP 1414121A1 EP 20020023825 EP20020023825 EP 20020023825 EP 02023825 A EP02023825 A EP 02023825A EP 1414121 A1 EP1414121 A1 EP 1414121A1
Authority
EP
European Patent Office
Prior art keywords
spark
plug
bonding cap
bonding
plug body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20020023825
Other languages
English (en)
French (fr)
Other versions
EP1414121B1 (de
Inventor
Lo Chin Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP02023825A priority Critical patent/EP1414121B1/de
Priority to AT02023825T priority patent/ATE322097T1/de
Priority to DE60215666T priority patent/DE60215666T2/de
Publication of EP1414121A1 publication Critical patent/EP1414121A1/de
Application granted granted Critical
Publication of EP1414121B1 publication Critical patent/EP1414121B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01T13/54—Sparking plugs having electrodes arranged in a partly-enclosed ignition chamber

Definitions

  • the present invention relates to a novel spark plug for widely using on internal combustion engines for cars, motorcycles, vessels, power generators, mowing machines, etc., and more particularly to a spark plug that provides the function of a pre-combustion chamber to enhance ignition and explosion of mixture in an engine combustion chamber while provides good heat radiating effect and extended usable life thereof.
  • Figs. 1A to 1D show some examples of the conventional spark plugs.
  • the conventional spark plug with the hood-type bonding has the function of a pre-combustion chamber, the hood thereof is so closed that it causes poor heat dissipation of the spark plug, resulting in increased compression ratio, less smooth flows of air into and out of the engine combustion chamber, and easy occurrence of engine knock and/or unstable engine idling speed to directly affect the functions and quality of the engines having the spark plug mounted thereon.
  • a primary object of the present invention is to provide a novel and durable spark plug that has the function of a pre-combustion chamber to enhance ignition and explosion of mixture in an engine combustion chamber while provides good heat radiating effect and extended usable life of the spark plug.
  • Another object of the present invention is to provide a spark plug in which a spark-ignition gap between a central tip and a bonding cap of the spark plug is always maintained at a fixed point, so that an ignition with the spark plug can be more easily done and a usable life of the spark plug is much longer than that of the conventional spark plugs.
  • the spark plug of the present invention mainly includes a spark-plug body and a spark-plug bonding cap connected to a front end of the spark-plug body.
  • the spark-plug body includes, from a rear end to a front end thereof, a nipple, a porcelain insulator, a middle hexagonal body nut, a diameter-reduced threaded portion, and a central tip enclosed in the porcelain insulator to forward project from a center of the threaded portion.
  • the spark-plug bonding cap includes a top portion having a tip release hole formed at a center thereof, aplural ity of fixing legs radially spaced along an outer periphery of the top portion for connecting to the spark-plug body, and a plurality of pointed-topped discharge contacts provided at an inner wall of the bonding cap around the tip release hole to enable concentrated discharge.
  • the spark plug of the present invention has extended service life and is able to maintain stable ignition in the engine combustion chamber, so that flames produced at explosion in the bonding cap could instantly propagate to reach as far as possible in the engine combustion chamber, enabling the mixture therein to stably burn and therefore provides an enhanced thermal efficiency, which in turn upgrades the engine horsepower and torque output, and reduces the amount of CO, HC, NOx, etc. contained in the exhaust of the engine.
  • the spark plug mainly includes a spark-plug body 1 and a spark-plug bonding cap 2 connected to a front end of the spark-plug body 1.
  • the spark-plug body 1 includes, from a rear end to a front end thereof, a nipple 11, a porcelain insulator 12, a middle hexagonal body nut 13, a diameter-reduced 'threaded portion 14, and a central tip 15 forward projected from a center of the threaded portion 14.
  • the spark-plug bonding cap 2 includes a top portion 21 having a tip release hole 22 formed at a center thereof, and a plurality of fixing legs 23 radially spaced along an outer periphery of the top portion 21 for connecting to the spark-plug body 1.
  • Fig. 4 is a three-view drawing showing a first embodiment of the bonding cap 2.
  • the fixing leg 23 may be a curved rectangle or a curved trapezoid, and may be three or more in number. In a most preferred embodiment of the bonding cap 2, three fixing legs 23 radially equally spaced from each other by 120 degrees are integrally extended from the outer periphery of the top portion 21.
  • the bonding cap 2 may have a rounded top portion 21 to look like a dome, as shown in Figs. 2 and 3, or have a flat-topped top portion 21, as shown in Figs. 4 and 5.
  • each of the fixing legs 23 is provided at a free end with a centered triangle-sectioned or round-sectioned strip of pre-connection material 24.
  • a plurality of pointed-topped discharge dots 26 are provided at an inner wall surface of the top portion 21 around the tip release hole 22 and are coated with a special metal material to enable concentrated discharge and improved discharge effect.
  • Fig. 5 is a three-view drawing showing another embodiment of the bonding cap 2 for the spark plug of the present invention.
  • the bonding cap 2 of this second embodiment is generally structurally similar to the first embodiment shown in Fig. 4, except that the fixing legs 23 are provided along an inner lower edge of their respective free ends with an axially extended flange 25 adapted to wedge into the front end of the spark-plug body 1, so that the bonding cap 2 can be well fixed to the spark-plug body 1 by way of welding or bonding.
  • the top portion 21 of the bonding cap 2 is located over the central tip 15 of the spark-plug body 1, and together with the spaced fixing legs 23 enclose a small room that functions like a small and opened pre-combustion chamber 3. Meanwhile, spaces 31 between any two adjacent fixing legs 23 provide good heat radiating effect and allow smooth flows of air into and out of the pre-combustion chamber 3.
  • the spark plug of the present invention is characterized in the generally arched bonding cap 2.
  • This structure enables the domed or flat-topped top portion 21 and the central tip 15 of the spark-plug body 1 to maintain a fixed and required spark-ignition gap between them.
  • the fixed spark-ignition gap together with the pointed discharge dots 26 around the tip release hole 15 and the spaces 31 between adjacent fixing legs 23 enable the spark plug of the present invention to have the following advantages:
  • the spark plug of the present invention has been proven in vehicle engine durability tests conducted over a long period for more than eighty thousand kilometers to have a usable life much longer than that of a conventional spark plug. This fact together with the above-mentioned advantages, including good combustion, upgraded engine horsepower and torque output, reduced exhaust pollution, and reduced fuel consumption of the engine, make the present invention superior to the conventional spark plugs and more practical for use .

Landscapes

  • Spark Plugs (AREA)
EP02023825A 2002-10-23 2002-10-23 Zündkerze Expired - Lifetime EP1414121B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP02023825A EP1414121B1 (de) 2002-10-23 2002-10-23 Zündkerze
AT02023825T ATE322097T1 (de) 2002-10-23 2002-10-23 Zündkerze
DE60215666T DE60215666T2 (de) 2002-10-23 2002-10-23 Zündkerze

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02023825A EP1414121B1 (de) 2002-10-23 2002-10-23 Zündkerze

Publications (2)

Publication Number Publication Date
EP1414121A1 true EP1414121A1 (de) 2004-04-28
EP1414121B1 EP1414121B1 (de) 2006-03-29

Family

ID=32050015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02023825A Expired - Lifetime EP1414121B1 (de) 2002-10-23 2002-10-23 Zündkerze

Country Status (3)

Country Link
EP (1) EP1414121B1 (de)
AT (1) ATE322097T1 (de)
DE (1) DE60215666T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104088747A (zh) * 2014-06-20 2014-10-08 李星 一种火花塞

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1360294A (en) * 1920-11-30 Spark-plttg
FR1013076A (fr) * 1950-02-21 1952-07-22 étui protecteur pour bougies d'allumage
US4808878A (en) * 1985-07-03 1989-02-28 Takeaki Kashiwara Ignition plug for internal combustion engines to cause instant combustion

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1360294A (en) * 1920-11-30 Spark-plttg
FR1013076A (fr) * 1950-02-21 1952-07-22 étui protecteur pour bougies d'allumage
US4808878A (en) * 1985-07-03 1989-02-28 Takeaki Kashiwara Ignition plug for internal combustion engines to cause instant combustion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104088747A (zh) * 2014-06-20 2014-10-08 李星 一种火花塞

Also Published As

Publication number Publication date
DE60215666T2 (de) 2007-02-15
DE60215666D1 (de) 2006-12-07
ATE322097T1 (de) 2006-04-15
EP1414121B1 (de) 2006-03-29

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