Hitachi, Ltd.

Hitachi Car Engineering Co., Ltd.

Other

Eiichiro Kondo

Noboru Sugiura

Junichi Shimada

Kazutoshi Kobayashi

Yoichi Anzo

Toshiaki Ueda

Takahide Kosai

Hiroshi Watanabe

Katsuaki Fukatsu

Kenji Nakabayashi

Masaru Ujigawa

Hidetoshi Oishi

Tatsuya Yoshida

Toshio Manaka

Hiroyuki Tanaka

Taisetsu Tanimichi

Hidefumi Adachi

Yasufumi Konishi

Kiyomi Ubukata

Junichi c/o Hitachi Ltd Intellectual Property Group Shimada

A long and narrow shape independent ignition type ignition apparatus has a long and narrow shape center core for an internal combustion engine. At least one of magnet member and a rubber material member is arranged at an end portion of the center core. A circumference of the center core including said magnet member and said rubber material member is surrounded using a soft material member.

Ignition coil for use in engine and engine having plastic cylinder head cover

To improve an anti-heat shock performance and an electric field concentration relaxation (an insulation performance) between a secondary coil and a center core, to attain a narrow diameter structure in an individual ignition type ignition coil and further to improve an assembling working of the ignition coil. The individual ignition type ignition coil is adopted to an engine having a plastic head cover. A secondary coilis positioned at an inner side of a primary coiland between a secondary bobbinand a center corea soft epoxy resinis filled up. In the secondary bobbin, a secondary coil low voltage side is a potting side of the soft epoxy resinand an inclination having a difference in an inner diameter is provided on the inner diameter in which the secondary coil low voltage side is formed large and secondary coil high voltage side is formed small. In the secondary bobbin, a thickness in the secondary coil low voltage side is formed thin and a thickness in the secondary coil high voltage side is formed thick. The soft epoxy resinhas a dent' according to a compression molding and has a glass transition point Tg which satisfies a condition of [an allowable stress of the secondary bobbin &#x3e; a generation stress at (from &#x2212;40&#xb0; C. to a glass transition point of an insulation resin)]. The secondary bobbin is formed by PPS and the primary bobbin is set to the primary coil at outer side of the secondary assembling body and under an assembling condition the winding is carried out.

A vehicle cruise control apparatus is provided for controlling a vehicle to run at a set speed desired by a driver. The apparatus stores a state in which the driver inputs a set speed (for example, the number of times the driver inputs the set speeds and a period at which the driver inputs the set speeds), and calculates a target acceleration/deceleration from the input state and a vehicle speed deviation (calculated by subtracting the actual vehicle speed from the set speed).

Method and apparatus for controlling vehicle cruise

An individual ignition type ignition coil is adopted to an engine having a plastic head cover. A secondary coil is positioned at an inner side of a primary coil and between a secondary bobbin and a center core a soft epoxy resin is filled up. The soft epoxy resin hash a dent according t a compression molding and has a glass transition point Tg which satisfies a specified condition. The secondary bobbin is formed by PPS and the primary bobbin is set to the primary coli at outer side of the secondary assembling body and under an assembling condition the winding is carried out.

The invention provides an ignition device of a cylindrical shape for an internal combustion engine, in which device it is possible to improves a productivity of a side core and a center core and to improve the efficiency of converting a magnetic flux together with the decreasing of the number of the steps of assembling process. The ignition device comprises a primary coil, a secondary coil, a center core, a side core, all of which are located concentrically in this order from the inside thereof, and a silicon steel strip having a thickness not more than 0.2 mm is used an a material of the side core so that a spirally wound, cylindrical shape is provided. Further, a thin film amorphous silicon steel strip having a flux density B8&gE;1.4T at a direct current magnetizing force of 800 A/m or a crystallized silicon steel strip having a thickness not more than 0.23 mm and having the same magnetic characteristics as above is used as a material of the center core, and the shape of the center core is formed in a spiral shape. Thus, it becomes possible to improve the productivity and to achieve the increase of flux density. Further, since it is possible to reduce the number of the parts in the side core, it is possible to reduce the number of the steps of an assembling process.

Ignition device for internal combustion engine

To improve an anti-heat shock performance and an electric field concentration relaxation (an insulation performance) between a secondary coil and a center core, to attain a narrow diameter structure in an individual ignition type ignition coil and further to improve an assembling working of the ignition coil. The individual ignition type ignition coil is adopted to an engine having a plastic head cover. A secondary coil,is positioned at an inner side of a primary coil,and between a secondary bobbin,and a center core,a soft epoxy resin,is filled up. In the secondary bobbin,, a secondary coil low voltage side is a potting side of the soft epoxy resin,and an inclination having a difference in an inner diameter is provided on the inner diameter in which the secondary coil low voltage side is formed large and secondary coil high voltage side is formed small. In the secondary bobbin, a thickness in the secondary coil low voltage side is formed thin and a thickness in the secondary coil high voltage side is formed thick. The soft epoxy resin,has a dent,&prime; according to a compression molding and has a glass transition point Tg which satisfies a condition of &lsqb;an allowable stress of the secondary bobbin<a generation stress at (from &minus;40&deg; C. to a glass transition point of an insulation resin)&rsqb;. The secondary bobbin is formed by PPS and the primary bobbin is set to the primary coil at outer side of the secondary assembling body and under an assembling condition the winding is carried out.

Ignition coil unit for engine and engine provided with plastic head cover

An ignition apparatus is received in a plug hole which is formed by a cylinder head and a cylinder head cover of an internal combustion engine. A side core has a slit between two horizontally extending side wall ends. The side core is selected from a laminated sheet structure comprised of two grain oriented silicon steel sheets, each having a slit between two horizontally extending side wall ends, and the plural slits align at substantially the same position. The slit prevents a one-turn short of a magnetic flux of the side core. Thereby a predetermined secondary voltage more than an engine requirement secondary voltage is obtained. An ignitor reception portion has an independent and individual ignitor reception portion and an independent and individual coil reception portion, with the ignitor reception portion and the coil reception portion being combined.

Ignition apparatus for use in internal combustion engine

In order to reduce the bulk and weight of the upper igniter case division of the armor case, and to lower the center of gravity of the total apparatus so as to provide an igniter which is tough to oscillate, the igniter for the internal combustion engine has the armor case equipped with the coil department and igniter unit therein, and said armor case has the igniter case having the coil department case and the connector department. Furthermore, the coil department case is inserted in the plug hole of the internal combustion engine. The igniter unit is mounted in the igniter case. Furthermore, the igniter unit has a semiconductor device of a simple substance silicon chip having integrated therein a semi-conductor for switching and a current limiting circuitry. The semi-conductor for switching consists of an insulated bipolar transistor (IGBT) or a power transistor.

Igniter for internal combustion engine having outer packing case

In order to reduce the bulk and weight of the upper igniter case division of an armor case, and to lower the center of gravity of the total apparatus so as to provide an igniter which is tough to oscillate, the igniter for the internal combustion engine has the armor case equipped with a coil compartment and igniter unit. The armor case has the igniter case having the coil case and connector. Furthermore, the coil compartment case is inserted in the plug hole of the internal combustion engine. The igniter unit is mounted in the igniter case. Furthermore, the igniter unit has a semiconductor device of a single substance silicon chip having integrated therein a semi-conductor for switching and a current limiting circuitry. The semi-conductor for switching consists of an insulated bipolar transistor (IGBT) or a power transistor.

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Hitachinaka, Japan

Eiichiro Kondo