EP0987435A2 - Spark plug ignition coil assembly for direct ignition system - Google Patents
Spark plug ignition coil assembly for direct ignition system Download PDFInfo
- Publication number
- EP0987435A2 EP0987435A2 EP99117884A EP99117884A EP0987435A2 EP 0987435 A2 EP0987435 A2 EP 0987435A2 EP 99117884 A EP99117884 A EP 99117884A EP 99117884 A EP99117884 A EP 99117884A EP 0987435 A2 EP0987435 A2 EP 0987435A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- ignition coil
- spark plug
- end portion
- insulator
- coil assembly
- 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
Links
- 239000012212 insulator Substances 0.000 claims abstract description 55
- 238000010068 moulding (rubber) Methods 0.000 claims abstract description 31
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012260 resinous material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
Definitions
- An ignition coil 12 is disposed above the spark plug 20.
- the ignition coil 12 has an iron core 13 at the center thereof and is disposed vertically.
- a rubber molding 15 embeds therein the ignition coil 12 so as to cooperate with the ignition coil 12 to constitute an integral unit.
- the rubber molding 15 has a hollow lower end portion 15A in which the upper end portion 21A of the insulator 21 is fitted.
- the hollow lower end portion 15A has at an inner periphery thereof a projection or smaller diameter section 15B.
- the inner periphery of the lower end portion 15A serves as a second joining section joined with the above described first joining section, i.e., the outer periphery of the upper end portion 21A of the insulator 21.
- the upper end portion 21A of the insulator 21 is fitted in the hollow lower end portion 15A of the rubber molding 15, while allowing the projection or smaller diameter inner peripheral section 15B of the rubber molding 15 to engage in the recess or smaller diameter outer peripheral section 21C of the insulator 21.
- the ignition coil 12 and the spark plug 20 are firmly joined together.
- the end of the connecting terminal 14 in the form of a needle is held assuredly in contact with the terminal 22, whereby it becomes possible to supply a high voltage produced by the ignition coil 21 to the spark plug 20 assuredly.
- Fig. 2 shows a spark plug and ignition coil assembly according to the second embodiment of the present invention.
- a hollow upper end portion of an insulator of a spark plug has an outer periphery serving as a first joining section, a hollow lower end portion of a rubber molding which embeds therein an ignition coil so as to cooperates with the ignition coil to constitute an integral unit has an inner periphery serving as a second joining section which is joined with the first joining section, and a fastening means is provided for fastening the first and second joining sections together, so the ignition coil and the spark plug are joined together with a large joining force so that leakage hardly occurs even if deterioration of the rubber molding occurs to sane extent.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
Abstract
A spark plug and ignition coil assembly for a direct
ignition system is provided. The assembly comprises a spark plug
having an insulator, the insulator having a hollow upper end
portion having at an outer periphery thereof a first joining
section, an ignition coil, a rubber molding embedding therein the
ignition coil so as to cooperate with the ignition coil to
constitute an integral unit, the rubber molding having a hollow
lower end portion in which the upper end portion of the insulator
is fitted, the lower end portion of the rubber molding having at
an inner periphery there of a second joining section joined with
the first engagement section, and fastening means for fastening
the first and second joining sections together. The fastening
means comprises a projection provided to one of the first and
second joining sections and a recess provided to the other of the
first and second joining sections.
Description
The present invention relates in general to direct ignition
systems for internal combustion engines, and more particularly
to a spark plug and ignition coil assembly for direct ignition
systems.
A direct ignition system is known in which a spark plug and
an ignition coil are connected directly with each other. The
direct ignition system is widely used in automotive engines for
the reason that it has various advantages, for example, it is
capable of eliminating spark-plug cables, reducing leakage
current and interference noise, and making the ignition timing
control easier.
An example of a prior art spark plug and ignition coil
assembly for a direct ignition system is shown in Fig. 4.
A spark plug 105 has an insulator made of alumina. The
insulator has a corrugated outer peripheral portion or ribs 105a
for the purpose of preventing a flashover. Protruded from the
upper end of the insulator is a terminal 104.
An ignition coil 101 is disposed above the spark plug 105.
The ignition coil 101 has an iron core 102 at the center thereof
and is disposed horizontally.
The spark plug 105 and the ignition coil 101 are connected
with a hollow, cylindrical rubber element 106.
The ignition coil 101 has a coupling sleeve 101a protruding
downward. The coupling sleeve 101a is fitted in the upper side
portion of the rubber element 106. The rubber element 106 is in
turn fitted at the lower side portion on the corrugated outer
peripheral portion 105a of the insulator.
A high voltage terminal (not shown) of the ignition coil
101 and the terminal 104 of the spark plug 105 are electrically
connected with a spring 103.
The prior art spark plug and ignition coil assembly for
direct ignition systems is encountered by the following problems.
It is an object of the present invention to provide a spark
plug and ignition coil assembly for a direct ignition system which
can attain a sufficient space for disposition of an ignition coil
without deteriorating the flashover resistance.
To achieve the above object, the present invention provides
a spark plug and ignition coil assembly for a direct ignition
system which comprises a spark plug having an insulator, the
insulator having a hollow upper end portion having at an outer
periphery thereof a first joining section, an ignition coil, a
rubber molding embedding therein the ignition coil so as to
cooperate with the ignition coil to constitute an integral unit,
the rubber molding having a hollow lower end portion in which the
upper end portion of said insulator is fitted, the lower end
portion of the rubber molding having at an inner periphery thereof
a second joining section joined with the first joining section,
and fastening means for fastening the first and second joining
sections together.
The fastening means comprises a projection provided to one
of the first and second joining sections and a recess provided
to the other of the first and second joining sections.
The upper end portion of the insulator is hollow, and the
spark plug has a terminal positioned entirely inside the upper
end portion of the insulator, i.e., the terminal is disposed at
the bottom of the hollow upper end portion of the insulator.
The spark plug and ignition coil assembly further comprises
a connecting terminal electrically connecting between the
terminal of the spark plug and the ignition coil, and an insulation
sleeve extending away from the ignition coil and protruding partly
into the upper end portion of the insulator so as to surround the
connecting terminal. The connecting terminal is in the form of
a needle or a compression spring.
Referring first to Fig. 1, a spark plug and ignition coil
assembly for a direct ignition system according to the first
embodiment of the present invention is generally designated by
11. The spark plug and ignition coil assembly 11 includes a spark
plug 20 with an insulator 21 made of ceramic containing a high
percentage of alumina. The insulator 21 has a hollow upper end
portion 21A with an axially recessed section 21B. The upper end
portion 21A of the insulator 21 has at an outer periphery thereof
a recess or a smaller diameter section 21C which constitutes part
of a fastening means. In this connection, the outer periphery
of the upper end portion 21A serves as a first joining section.
A terminal 22 is disposed at the bottom of the recessed section
21B. In other words, the terminal 22 is disposed entirely inside
the hollow upper end portion 21A of the insulator 21 or the
terminal 22 is disposed so as to have an upper end positioned
inside the upper end portion 21A of the insulator 21. The spark
plug 20 has a ground electrode 23 and a center electrode 24.
An ignition coil 12 is disposed above the spark plug 20.
The ignition coil 12 has an iron core 13 at the center thereof
and is disposed vertically. A rubber molding 15 embeds therein
the ignition coil 12 so as to cooperate with the ignition coil
12 to constitute an integral unit. The rubber molding 15 has a
hollow lower end portion 15A in which the upper end portion 21A
of the insulator 21 is fitted. The hollow lower end portion 15A
has at an inner periphery thereof a projection or smaller diameter
section 15B. In this connection, the inner periphery of the lower
end portion 15A serves as a second joining section joined with
the above described first joining section, i.e., the outer
periphery of the upper end portion 21A of the insulator 21. The
projection 15B constitutes another part of the fastening means
for fastening the first and second joining sections together,
i.e., fastening the upper end portion 21A of the insulator 21 and
the lower end portion 15A of the rubber molding 15 together. A
connecting terminal 14 in the form of a needle is disposed at the
center of the hollow lower end portion 15A of the rubber molding
15 in a way as to electrically connect between a high voltage
terminal (not shown) of the ignition coil 12 and the terminal 22
of the spark plug 20 for thereby supplying a secondary voltage
from the ignition coil 12 to the spark plug 20.
The upper end portion 21A of the insulator 21 is fitted in
the hollow lower end portion 15A of the rubber molding 15, while
allowing the projection or smaller diameter inner peripheral
section 15B of the rubber molding 15 to engage in the recess or
smaller diameter outer peripheral section 21C of the insulator
21. By this, the ignition coil 12 and the spark plug 20 are firmly
joined together. In this instance, the end of the connecting
terminal 14 in the form of a needle is held assuredly in contact
with the terminal 22, whereby it becomes possible to supply a high
voltage produced by the ignition coil 21 to the spark plug 20
assuredly.
The spark plug and ignition coil assembly 11 can produce
the following effect. The ignition coil 12 is formed integral
with the rubber molding 15 having the hollow lower end portion
15A, in such a manner that the core 13 is disposed vertically.
The hollow lower end portion 15A of the rubber molding 15 has at
the inner periphery thereof the projection 15B which is engaged
in the recess 21C provided to the outer periphery of the upper
end portion 21A of the insulator 21. By this, the ignition coil
12 and the spark plug 20 can be joined together with a large
joining force so that leakage hardly occurs even if deterioration
of the rubber molding 15 occurs to a certain extent.
Further, since the connecting terminal 14 in the form of
a needle protrudes into the recessed section 21A of the upper end
portion of the insulator 21 to be connected to the terminal 22
disposed at the bottom of the recessed section 21B, whereby the
ignition coil 12 and the spark plug 20 can be disposed nearer to
each other so that a larger space than before can be attained for
disposition of the ignition coil 12. By this, the ignition coil
12 can be made longer than before, thus making it possible for
the ignition coil 12 to be of the higher energy type, i.e., of
the type capable of storing and generating a higher energy, and
making it possible to improve the ignitability of the engine.
Further, the cylinder head can be made thinner, and therefore the
engine can be lighter.
In this instance, it is to be noted the terminal 22 is
disposed at the bottom of the recessed section 21B of the upper
end portion 21A of the insulator 21 to be covered thereby and the
insulator 21 is in turn nearly entirely covered by the rubber
molding 15 which is formed integral with the ignition coil 12,
while allowing the terminal 14 in the form of a needle to be
similarly to be covered by the insulator 21 and the rubber molding
15, so that not only leakage between the terminal 22 and the
adjacent metallic parts but leakage between the terminal 14 and
the adjacent metallic parts hardly never occurs.
As having been described above, in the spark plug and
ignition coil assembly 11, the insulator 21 of the spark plug 20
has at the outer periphery thereof the recess 21C and the rubber
molding 15 integral with the ignition coil 12 has the projection
15B engaged in the recess 21C. By this, the ignition coil 12 and
the spark plug 20 are joined together with a large joining force,
so leakage hardly occurs even if deterioration of the rubber
molding 15 occurs to some extent.
Fig. 2 shows a spark plug and ignition coil assembly
according to the second embodiment of the present invention.
In the figure, only a portion of the second embodiment
which differs from the first embodiment of Fig. 1 is shown. In
the second embodiment, the rubber molding 115 has the hollow lower
end portion 115A in which the upper end portion 121A of the
insulator 121 is fitted. The hollow lower end portion 115A has
at an inner periphery thereof a recess or a larger diameter section
115B which constitutes part of a fastening means. The upper end
portion 121A of the insulator 121 has at the outer periphery
thereof a projection or a larger diameter section 121C which
constitutes another part of the fastening means. The projection
121C and recess 115B are annular and have a trapezoidal cross
section.
The second embodiment differs from the first embodiment in
that the first joining section, i.e., the outer periphery of the
upper end portion 121A of the insulator 121 is provided with the
projection 121C, whereas the second joining section, i.e., the
inner periphery of the lower end portion 115A of the rubber molding
115 is provided with the recess 115B. Except for this, the second
embodiment is substantially similar to the first embodiment and
can produce substantially the same effect.
Fig. 3 shows the third embodiment. In the figure, only a
portion of the third embodiment which differs from the first
embodiment is shown.
In this second embodiment, the rubber molding 215 in which
the ignition coil 12 is embedded to constitute an integral unit,
has a hollow lower end portion 215A in which the upper end portion
221A of the insulator 221 is fitted. The hollow lower end portion
215A has at an inner periphery thereof a projection or a smaller
diameter section 215B which constitutes part of a fastening means.
On the other hand, the upper end portion 221A of the insulator
221 has at the outer periphery thereof a recess or smaller diameter
section 221C which constitutes another part of the fastening
means. The projection 215B and the recess 221C are annular and
have a rectangular cross section.
The third embodiment differs from the first embodiment in
that a connecting terminal 17 in the form of a compression coil
spring is used in place of the connecting terminal 14 in the form
of a needle and a cylindrical insulation sleeve 18 is provided
so as to surround the connecting terminal 17 in the form of a
compression coil spring. The insulation sleeve 18 is disposed
so as to extend away from the ignition coil 12 and protrude partly
into the upper end portion 221A of the insulator 221 so as to
surround the connecting terminal 17.
The connecting terminal 17 in the form of a compression coil
spring can contact the terminal 22 and the high voltage terminal
(not shown) of the coil spring 12 with the more constant pressure
as compared with the connecting terminal 14 in the form of a
needle. Thus, the contact resistance is constant so it becomes
possible to supply the secondary voltage produced by the ignition
coil 12 to the spark plug 20 stably and assuredly.
Further, since the cylindrical insulation sleeve 18 made
of an insulating resinous material is provided so as to surround
the connecting terminal 17, it becomes possible to make larger
the resistance to leakage between the connecting terminal and
other metallic parts, thus making it possible to prevent the
leakage more assuredly.
While the cylindrical sleeve 18 is used in combination with
the connecting terminal 17 in the form of a compression spring,
it can otherwise be used in combination with the connecting
terminal 14 in the form of a needle.
From the foregoing, it will be understood that in a spark
plug and ignition coil assembly for a direct ignition system
according to the present invention, a hollow upper end portion
of an insulator of a spark plug has an outer periphery serving
as a first joining section, a hollow lower end portion of a rubber
molding which embeds therein an ignition coil so as to cooperates
with the ignition coil to constitute an integral unit has an inner
periphery serving as a second joining section which is joined with
the first joining section, and a fastening means is provided for
fastening the first and second joining sections together, so the
ignition coil and the spark plug are joined together with a large
joining force so that leakage hardly occurs even if deterioration
of the rubber molding occurs to sane extent.
It will be further understood that the upper end portion
of the insulator of the spark plug has a recessed section and the
terminal of the spark plug is disposed at the bottom of the
recessed section of the insulator, and that the ignition coil and
the terminal are connected with a connecting terminal in the form
a needle or a compression coil spring, thus making it possible
to arrange the ignition coil and the spark plug closer to each
other than before and therefore making it possible to attain a
larger space for disposition of the ignition coil. By this, the
ignition coil can be made longer and therefore the ignition coil
can be of a larger energy type so that the ignitability of the
engine can be improved. Further, the cylinder head can be thinner
than before, thus making it possible to make lighter the engine.
The present invention has been described in an illustrative
manner. It is to be understood that the terminology which has
been used is intended to be in the nature of words of description
rather than of limitation.
Many modifications and variations of the present invention
are possible in light of the above teachings. Therefore, within
the scope of the appended claims, the present invention many be
practiced otherwise than as specifically described.
Claims (15)
- A spark plug and ignition coil assembly (11) for a direct ignition system comprising:a spark plug (20) having an insulator (21);said insulator (21) having a hollow upper end portion (21A; 121A; 221A) having at an outer periphery thereof a first joining section;an ignition coil (12); anda rubber molding (15) embedding therein said ignition coil (12) so as to cooperate with said ignition coil (12) to constitute an integral unit;said rubber molding (15) having a hollow lower end portion (15A; 115A; 215A)in which said upper end portion (21A; 121A; 221A) of said insulator (21) is fitted;said lower end portion (15A: 115A; 215A))of said rubber molding (15) having at an inner periphery there of a second joining section joined with said first engagement section;fastening means (15B, 21C; 115B, 121C; 215B, 221C) for fastening said first and second joining sections together.
- A spark plug and ignition coil assembly (11) according to claim 1, wherein said fastening means comprises a projection (15B; 121C; 215B) provided to one of said first and second joining sections and a recess (21C; 115B; 221C) provided to the other of said first and second joining sections.
- A spark plug and ignition coil assembly according to claim 2, wherein said projection (121C) and said recess (115B) are annular and have a trapezoidal cross section.
- A spark plug and ignition coil assembly according to claim 2, wherein said projection (215B) and said recess (221C) are annular and have a rectangular cross section.
- A spark plug and ignition coil assembly according to claim 1, wherein said upper end portion (21A; 121A; 221A) of said insulator (21) is hollow, said spark plug (20) having a terminal (22) positioned entirely inside said upper end portion (21A; 121A; 221A) of said insulator (21).
- A spark plug and ignition coil assembly (11) according to claim 5, further comprising a connecting terminal (14; 17) electrically connecting between said terminal (22) of said spark plug (20) and said ignition coil (12).
- A spark plug and ignition coil assembly (11) according to claim 6, further comprising an insulation sleeve (18) extending away from said ignition coil (12) and protruding partly into said upper end portion (221A) of said insulator (21) so as to surround said connecting terminal (17).
- A spark plug and ignition coil assembly (11) according to claim 6, wherein said connecting terminal (14) is in the form of a needle.
- A spark plug and ignition coil assembly according to claim 6, wherein said connecting terminal (17) is in the form of a coil spring.
- A spark plug and ignition coil assembly (11) for a direct ignition system comprising:a spark plug (20) having an insulator (21);said insulator (21) having a hollow upper end portion (21A; 121A; 221A) having a larger diameter outer peripheral section (121C) and a smaller diameter outer peripheral section (21C; 221C);an ignition coil (12); anda rubber molding (15) embedding therein said ignition coil so as to cooperate with said ignition coil (12) to constitute an integral unit;said rubber molding (15) having a hollow lower end portion (15A; 115A; 215A) in which said upper end portion (21A; 121A; 221A) of said insulator (21) is fitted;said lower end portion (15A; 115A; 215A) of said rubber molding (15) having a larger diameter inner peripheral portion (115B) and a smaller diameter inner peripheral portion (15B; 215B) which are respectively joined with said larger diameter outer peripheral section (121C) and said smaller diameter outer peripheral section (21C; 221C) of said upper end portion (21A) of said insulator (21) so that said lower end portion (15A; 115A; 215A)) of said rubber molding (15) and said upper end portion (21A; 121A; 221A) of said insulator (21) are fastened together.
- A spark plug and ignition coil assembly (11) according to claim 10, wherein said upper end portion (21A) of said insulator (21) is hollow, said spark plug (20) having a terminal (22) which is disposed so as to have an upper end positioned inside said upper end portion (21A; 121A; 221A) of said insulator (21).
- A spark plug and ignition coil assembly (11) according to claim 11, further comprising a connecting terminal (14; 17) electrically connecting between said terminal (22) of said spark plug (20) and said ignition coil (12).
- A spark plug and ignition coil assembly (11) according to claim 12, further comprising an insulation sleeve (18) extending away from said ignition coil (12) and protruding partly into said upper end portion (221A) of said insulator (21) so as to surround said connecting terminal (17).
- A spark plug and ignition coil assembly according to claim 12, wherein said connecting terminal (14) is in the form of a needle.
- A spark plug and ignition coil assembly according to claim 12, wherein said connecting terminal (17) is in the form of a coil spring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25969798 | 1998-09-14 | ||
| JP10259697A JP2000091057A (en) | 1998-09-14 | 1998-09-14 | Direct ignition type plug |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0987435A2 true EP0987435A2 (en) | 2000-03-22 |
| EP0987435A3 EP0987435A3 (en) | 2002-06-19 |
| EP0987435B1 EP0987435B1 (en) | 2005-02-16 |
Family
ID=17337680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19990117884 Expired - Lifetime EP0987435B1 (en) | 1998-09-14 | 1999-09-10 | Spark plug ignition coil assembly for direct ignition system |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0987435B1 (en) |
| JP (1) | JP2000091057A (en) |
| DE (1) | DE69923739T2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6675785B2 (en) | 2002-04-01 | 2004-01-13 | Denso Corporation | Ignition device for an internal combustion engine |
| US6698411B2 (en) | 2002-04-01 | 2004-03-02 | Denso Corporation | Ignition device for internal combustion engine |
| US7017566B2 (en) | 2002-04-01 | 2006-03-28 | Denso Corporation | Ignition device for an internal combustion engine |
| WO2013172771A1 (en) | 2012-05-14 | 2013-11-21 | Sem Ab | Spark plug extension |
| WO2018234095A1 (en) | 2017-06-19 | 2018-12-27 | Sem Ab | EXTENSION OF IGNITION CANDLE |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020001305A (en) * | 2000-06-28 | 2002-01-09 | 배길훈 | Boot assembly of ignition coil in vehicle |
| KR100560758B1 (en) * | 2001-12-10 | 2006-03-13 | 한국델파이주식회사 | Automotive Ignition Coil |
| JP5012753B2 (en) * | 2007-10-31 | 2012-08-29 | 株式会社デンソー | Ignition coil and manufacturing method thereof |
| JP4978488B2 (en) * | 2008-01-30 | 2012-07-18 | 株式会社デンソー | Ignition coil manufacturing method |
| JP6259624B2 (en) * | 2013-09-30 | 2018-01-10 | 株式会社Ｓｏｋｅｎ | Ignition device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60195374A (en) * | 1984-03-16 | 1985-10-03 | Sawafuji Electric Co Ltd | Ignition device for internal-combustion engine |
| JPS6375358A (en) * | 1986-09-18 | 1988-04-05 | Nippon Denso Co Ltd | Ignition device for internal combustion engine |
| JP3277750B2 (en) * | 1995-04-26 | 2002-04-22 | 三菱電機株式会社 | Transmission device and ignition device for ignition device of internal combustion engine |
| JP3115240B2 (en) * | 1996-09-11 | 2000-12-04 | 株式会社日立製作所 | Ignition device for internal combustion engine |
-
1998
- 1998-09-14 JP JP10259697A patent/JP2000091057A/en active Pending
-
1999
- 1999-09-10 EP EP19990117884 patent/EP0987435B1/en not_active Expired - Lifetime
- 1999-09-10 DE DE69923739T patent/DE69923739T2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6675785B2 (en) | 2002-04-01 | 2004-01-13 | Denso Corporation | Ignition device for an internal combustion engine |
| US6698411B2 (en) | 2002-04-01 | 2004-03-02 | Denso Corporation | Ignition device for internal combustion engine |
| US7017566B2 (en) | 2002-04-01 | 2006-03-28 | Denso Corporation | Ignition device for an internal combustion engine |
| WO2013172771A1 (en) | 2012-05-14 | 2013-11-21 | Sem Ab | Spark plug extension |
| US10164410B2 (en) | 2012-05-14 | 2018-12-25 | Sem Ab | Spark plug extension |
| WO2018234095A1 (en) | 2017-06-19 | 2018-12-27 | Sem Ab | EXTENSION OF IGNITION CANDLE |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0987435B1 (en) | 2005-02-16 |
| EP0987435A3 (en) | 2002-06-19 |
| JP2000091057A (en) | 2000-03-31 |
| DE69923739T2 (en) | 2005-07-07 |
| DE69923739D1 (en) | 2005-03-24 |
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