Hitachi, Ltd.

Other

Hitachi Car Engineering Co., Ltd.

Hitachi, Ltd. and Hitachi Car Engineering Co., Ltd.

Noboru Sugiura

Ryoichi Kobayashi

Junichi Shimada

Katsuaki Fukatsu

Kazutoshi Kobayashi

Yoichi Anzo

Seiji Suda

Eiichiro Kondo

Takashi Ito

Noriyoshi Urushiwara

Toshiaki Ueda

Yasunori Mouri

Kazuhiko Kawakami

Kenichi Katagishi

Kenji Nakabayashi

Hiroshi Watanabe

Takahide Kosai

Toshio Ishii

Osamu Abe

Yuichi Kashimura

Toshiaki Kaminaga

Takashi Yoshinari

Yasuo Noto

Norio Moriyama

Hidetoshi Oishi

Terumi Okado

Masahiro Matsumoto

Keiji Hanzawa

Hiroshi Kimura

Shoji Sasaki

Masami Shida

Takafumi Matsumura

Takashi Mukaihira

Yasunori Mori

Ryoichi Koshida

Masaru Ujigawa

Yasunori Fujino

Yoshiyuki Yasui

Fumio Tajima

Mamoru Sawada

Kunio Miyashita

Yutaka Nishimura

Akira Tanaka

Yoshishige Ohyama

Shotaro Naito

Akio Yasukawa

Kenji Tabuchi

Toshio Furuhashi

Hirohisa Yamamura

Mitsukuni Tsutsui

Syooichi Kawamata

Seizi Yamashita

Toshinori Okita

Hiromitsu Nagae

Hiroshi Onuki

Shigeru Horikoshi

Hitoshi Minorikawa

Hideyuki Ouchi

Hiroshi Fujiwara

Akira Teragakiuchi

Eiichiro Konda

Tomoyuki Okada

Kazuhiro Uchimi

Ryouichi Kobayashi

Hayato Koguchi

Hidetoshi Oichi

Takahashi Ito

Satoshi Hirakawa

Toshiaki Iikubo

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 gas flow meter having a gas flow detection circuit for detecting a current flowing through a resistor installed in a gas passage and a voltage generated across the resistor and outputting a voltage signal representing a gas flow passing through the gas passage; a noise reduction circuit for reducing external noise; and a digital adjusting circuit for digitally adjusting a signal representing the detected gas flow and outputting the adjusted signal; wherein a voltage signal based on the signal adjusted by the digital adjusting circuit is output.

Gas flow meter

An independent ignition type ignition coil for an internal combustion engine, comprising, arranged concentrically in a coil case ( ) and with the innermost one mentioned first, a center core ( ), a secondary coil ( ) wound on a secondary bobbin ( ) and a primary coil ( ) wound on a primary bobbin ( ), with epoxy resin ( ) and soft epoxy ( ) filled between these component members, wherein a coating is formed on the outer surface of the primary coil ( ) so as to facilitate the separation from the epoxy resin ( ) and the presence of this separation portion ( ) between the primary coil ( ) and the resin and in an interlayer of the primary coil ( ) can reduce from a thermal stress produced within the secondary bobbin ( ) a stress which is produced in the secondary bobbin by a heat contraction difference between the primary coil ( ) and the secondary bobbin, thereby reducing the thermal stress of the secondary bobbin of the independent type ignition coil exposed to a rigorous temperature environment to prevent bobbin cracking and ensure an integrity of electrical insulation.

Internal combustion engine ignition coil

An ignition apparatus for an internal combustion engine has an arrangement comprising a power part and a control part which are accumulated in a one-chip in an IGBT monolithic silicon substrate. The control circuit part has current limiting function of prevent the flowing of any current which is above a predetermined value as well as function of detecting malfunction heat generation by which a primary electric current is blocked compulsorily. The secondary voltage of an ignition coil is generated repeatedly below a plug discharge voltage so as not to generate spark discharge in the sparking plug when the electric current compulsory blocking is carried out, and energy charged in the ignition coil is emitted or discharged. With this arrangement, the one-chip ignition apparatus with high reliability can be achieved.

Ignition apparatus for internal combustion engine and one-chip semiconductor for internal combustion engine igniting

A main IGBT conducts or blocks a primary current flowing through the ignition coil in response to an input ignition control signal to generate a high voltage on the secondary side of the ignition coil. The main IGBT and a current limiter circuit are integrated in a monolithic silicon substrate of an insulating gate bipolar power transistor. The main IGBT has a collector and agate connected through a depletion IGBT forming part of a constant current circuit, and a resistor. When a voltage generated across the resistor becomes equal to or higher than a zener voltage, a zener diode leads this current to an emitter of the main IGBT.

Ignition system for internal combustion engine

An ignition apparatus is provided for internal combustion engines to obtain higher reliability for the solder bonding parts. The ignition apparatus includes a molded case having an input-output terminal formed on the molded case, a semiconductor switching device, a control circuit board, and a heat sink. As such, the molded case provides a single body for containing the input-output terminal, the semiconductor switching device, the control circuit board and the heat sink. On the heat sink, one or more laminated structures are used, including the semiconductor switching devices with beryllia as an electric insulation plate.

Ignition apparatus for internal combustion engine with improved electrical insulation plate including beryllia

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.

A one-chip integration circuit including a power part and a control part integrated within an IGBT monolithic silicon substrate is disclosed. The control circuit part comprises a current limiting circuit for limiting a current so that it does not flow over a set-up value, a reference pulse generating circuit for detecting that an ignition control signal is inputted over a predetermined period of time, a digital timer made up by a digital counter, a latch circuit for dropping the gate voltage of the IGBT by latching due to the digital timer output signal and carrying out resetting when the ignition control signal is off, an input circuit having a potential comparison circuit in its input stage, in which the operation voltage for ignition control signal has a threshold value and a hysterisis, and an input protection circuit having a Zener diode and a resistor connected in parallel therewith for protecting the element from disturbance surges. A one-chip igniter with high operative stability and high reliability can be provided.

Ignition device for an internal combustion engine

Durability and lifetime of a resin sealed electronic device is improved by reducing thermal stresses acting on the power element and the parts mounting on the board. A power element of which the protective film on the power element is coated with a polyimide group resin at manufacturing the element is used, and a metallic heat sink of which the reverse side surface (portion of mounting on a board) is not plated is used. Further, a linear expansion coefficient of the molding resin is within a range of 3&times;10 /&deg;C. to 17&times;10 /&deg;C. The durability and the lifetime of the resin sealed electronic device is improved, because the thermal stresses are reduced by balancing linear expansion coefficients of the parts.

Resin sealed electronic device

An apparatus for detecting abnormality of a vehicle sensor and a method are provided. The apparatus is capable of preventing erroneous detection of abnormalities of sensors. The apparatus has a grip degree detecting device for detecting grip degree of a wheel of the vehicle with respect to a road surface. In a case in which the grip degree is lower than a predetermined degree, detection for presence of an abnormality of a yaw rate sensor, a cross acceleration sensor and a steering angle sensor are prohibited.

Apparatus for detecting abnormality of a vehicle sensor and method

Object: The present invention is intended to supply an internal combustion engine-use igniter that is compact, excellent in mountability, and can contribute to the simplification and automation of assembly and to cost reduction. Implementing means: An insulated gate bipolar transistor (IGBT) is used as the ignition coil switching device for the internal combustion engine. The IGBT and a current limiting circuit intended to protect it from an overcurrent are formed on single semiconductor chip , and this semiconductor chip and radio noise reduction capacitor are contained in single packaging unit having external input and output terminals to . Packaging unit is transfer-molded using a material such as epoxy resin.

Igniter for internal combustion engine

In an independent ignition type ignition coil for an internal combustion engine which is used being directly coupled to a corresponding ignition plug, a center core , a secondary coil wound around a secondary coil bobbin and a primary coil wound around a primary coil bobbin are arranged concentrically in a coil casing in this order from the inside thereof and such as epoxy resin and soft epoxy are filled between these constituting members, wherein on the outer surface of the primary coil a cover film which promotes peeling off thereof from the epoxy resin is formed, and because of existence of these peeling off portions between the primary coil and the epoxy resin and between the layers of the primary coil , a stress component induced inside the secondary coil bobbin due to heat contraction difference between the primary coil and the secondary coil bobbin among thermal stress induced inside the secondary coil bobbin is reduced.

Ignition coil 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

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Mito, Japan

Noboru Sugiura