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1. (WO1998053467) IGNITION COIL UNIT FOR ENGINE AND ENGINE PROVIDED WITH PLASTIC HEAD COVER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/053467 International Application No.: PCT/JP1998/002244
Publication Date: 26.11.1998 International Filing Date: 22.05.1998
Chapter 2 Demand Filed: 02.09.1998
IPC:
F02P 3/02 (2006.01) ,F02P 3/04 (2006.01) ,F02P 13/00 (2006.01) ,H01F 27/32 (2006.01) ,H01F 38/12 (2006.01) ,H01T 13/44 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
P
IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
3
Other electric spark ignition installations characterised by the type of ignition power generation storage
02
having inductive energy storage, e.g. arrangements of induction coils
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
P
IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
3
Other electric spark ignition installations characterised by the type of ignition power generation storage
02
having inductive energy storage, e.g. arrangements of induction coils
04
Layout of circuits
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02
COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
P
IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
13
Sparking plugs structurally combined with other parts of internal-combustion engines
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
27
Details of transformers or inductances, in general
28
Coils; Windings; Conductive connections
32
Insulating of coils, windings, or parts thereof
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
38
Adaptations of transformers or inductances for specific applications or functions
12
Ignition, e.g. for IC engines
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
T
SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
13
Sparking plugs
40
structurally combined with other devices
44
with transformers, e.g. for high-frequency ignition
Applicants:
HITACHI, LTD. [JP/JP]; 6, Kanda Surugadai 4-chome Chiyoda-ku Tokyo 101-8010, JP (AllExceptUS)
HITACHI CAR ENGINEERING CO., LTD. [JP/JP]; 2477, Takaba Hitachinaka-shi Ibaraki 312-0062, JP (AllExceptUS)
SHIMADA, Junichi [JP/JP]; JP (UsOnly)
SUGIURA, Noboru [JP/JP]; JP (UsOnly)
ANZO, Yoichi [JP/JP]; JP (UsOnly)
KONDO, Eiichiro [JP/JP]; JP (UsOnly)
KOBAYASHI, Kazutoshi [JP/JP]; JP (UsOnly)
KOSAI, Takahide [JP/JP]; JP (UsOnly)
UEDA, Toshiaki [JP/JP]; JP (UsOnly)
Inventors:
SHIMADA, Junichi; JP
SUGIURA, Noboru; JP
ANZO, Yoichi; JP
KONDO, Eiichiro; JP
KOBAYASHI, Kazutoshi; JP
KOSAI, Takahide; JP
UEDA, Toshiaki; JP
Agent:
TAKADA, Yukihiko ; 1-48, Saiwai-cho 2-chome Hitachi-shi Ibaraki 317-0073, JP
Priority Data:
9/13406923.05.1997JP
9/18155907.07.1997JP
Title (EN) IGNITION COIL UNIT FOR ENGINE AND ENGINE PROVIDED WITH PLASTIC HEAD COVER
(FR) BOBINE D'ALLUMAGE POUR MOTEUR ET MOTEUR POURVU D'UN CAPOT EN PLASTIQUE
Abstract:
(EN) An ignition coil unit for engines wherein the diameter of a coil of an independently ignitable ignition coil unit is reduced by improving resistance to thermal shock and relaxation of static focusing, i.e. insulation, between a secondary coil and a center core of the unit. The unit can be applied to an engine provided with a plastic head cover, and workability in assembling the unit can be improved. A secondary coil (3) is disposed inside a primary coil (5), and a soft epoxy resin (17) is filled between a secondary bobbin (2) and a center core (1). The bobbin (2) is designed so that the epoxy resin (17) is filled from the lower-voltage side of the secondary coil. The inside diameter of the bobbin (2) is tapered in such a manner that the lower-voltage side of the secondary coil is wider than the higher-voltage side, so that the thickness on the lower-voltage side of the secondary coil is decreased and the thickness on the higher-voltage side is increased. The epoxy resin (17) has a recess (17') formed by pressure-molding, and has a value Tg that satisfies the condition that an allowable stress of the secondary bobbin is greater than a stress caused at -40° C minus the glass transition point (Tg) of insulating resin. The bobbin (2) is made of PPS, and the primary coil is wound with a primary bobbin set outside the secondary coil assembly to wind both as an assembly.
(FR) Le diamètre de bobine de cet ensemble bobine d'allumage autonome pour moteurs a pu être réduit car on a amélioré la résistance au choc thermique et on a réduit l'accumulation électrostatique, et notamment l'isolation, entre le secondaire et un noyau central de l'ensemble. Cet ensemble convient à un moteur pourvu d'un capot en plastique. Les modalités d'assemblage de cet ensemble ont en outre été améliorées. En l'occurrence, un secondaire (3) est disposé à l'intérieur du primaire (5). En outre, le vide entre le bobinage du secondaire (2) et le noyau central (1) est rempli d'une résine époxy molle (17). Le bobinage (2) est conçu de sorte que la résine époxy (17) puisse être introduite par le côté basse tension du secondaire. Le diamètre intérieur du bobinage (2) se resserre, dans le sens 'basse tension' - 'haute tension' du secondaire, ce qui fait que l'épaisseur du côté basse tension du secondaire a pu être diminuée, alors que l'épaisseur du côté haute tension a pu être accrue. La résine époxy (17) présente un évidement (17') obtenue par moulage sous pression. La température de transition vitreuse (Tg) de cette résine est conçue pour que la contrainte admissible du bobinage du secondaire soit supérieure à la contrainte subie à une température de -40 °C moins la température de transition vitreuse (Tg) de la résine isolante. Le bobinage (2) est fait de polysulfure de phénylène (PPS). La réalisation de l'enroulement du primaire fait que le bobinage du primaire se trouve à l'extérieur de l'ensemble du secondaire, réunissant ainsi dans l'enroulement les deux en un seul ensemble.
front page image
Designated States: CN, KR, US
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
KR1020010012877EP0984463EP1225603EP1225604EP1225605EP1225606
EP1220244EP1878910US6332458US20020026929US20040069288CN1257603
KR1004180050000*