Hitachi, Ltd.

Other

Hitachi Automotive Systems, Ltd.

Hitachi Car Engineering Co., Ltd.

Toru Ishikawa

Motoyuki Abe

Yuzo Kadomukai

Yoshio Okamoto

Ayumu Miyajima

Makoto Yamakado

Yasuo Namaizawa

Takehiko Kowatari

Hiromasa Kubo

Hiroshi Fujii

Noriyuki Maekawa

Masayuki Kobayashi

Masahiko Hayatani

Koji Harada

Eiichi Kubota

Toshiharu Nogi

Takuya Shiraishi

Masami Nagano

Yasuhiko Sasaki

Nobuaki Kobayashi

Mamoru Fujieda

Yoshiyuki Tanabe

Masashi Yano

Shigenori Togashi

Takanobu Ichihara

Hiroaki Saeki

Kiyoshi Amou

Noboru Azusawa

Makoto Tachikawa

Hitoshi Furudate

Tadahiko Hashimoto

Hirotaka Nakai

Kenji Watanabe

Noriyuki Sugiura

Kuniyuki Igari

Hideo Munehiro

Kooji Shibata

Kiyoshi Yoshii

An electromagnetic fuel injection valve includes: a valve element which closes a fuel passage by coming into contact with a valve seat and opens the fuel passage by going away from the valve seat; an electromagnet which includes a coil and a magnetic core formed as a drive portion for driving the valve element; a movable element which is held by the valve element in a state where the movable element is displaceable in the direction of a drive force of the valve element relative to the valve element; a first biasing portion for biasing the valve element in the direction opposite to the direction of a drive force generated by the drive portion; a second biasing portion for biasing the movable element in the direction of the drive force with a biasing force smaller than the biasing force generated by the first biasing portion; and a restricting portion for restricting the displacement of the movable element in the direction of the drive force relative to the valve element.

Electromagnetic fuel injection valve

In order to solve the problem in that information relating to a specific purpose can be saved in the internal memory of a mobile apparatus on which a permanent memory is mounted while information relating to other purpose cannot be saved in the internal memory of the apparatus, the purpose of each telephone call is distinguished by sending a non-telephone type notice before transferring the call and thus the user can determine whether the call should be saved or not.

Highly secured portable telephone system and information system

In a fuel injection valve used for an internal combustion engine, a valve closing lag time due to fluid resistance in a fuel path is shortened to decrease a minimum injection limit. More specifically, in the fuel injection valve in which an anchor is attracted to an end face part of a stationary core having a fuel path formed at a center part thereof by means of electromagnetic force, and in which a fuel injection hole is opened and closed by controlling a valve disc driven in conjunction with the anchor, there are provided a fuel reservoir part at a center part of an upper end face part of the anchor, a through hole extending axially in a fashion that an end part thereof is open to the fuel reservoir part, and a fuel path extending radially outward from the fuel reservoir part so that fuel is fed to a magnetic attraction gap between an upper end face part of the anchor and a lower end face part of the stationary core. Further, an opening part of a through hole that is open to an upper end face part of the anchor is at least partially opposed to a fuel introduction bore formed in the stationary core, and on the opening part of the through hole, a fuel introduction part is provided for capturing fuel running radially outward from a center side part of the anchor and for guiding the fuel thus captured to the through hole.

Fuel injection valve

In relation to injectors used for internal-combustion engines, it is important to decrease valve closing delay time and also the minimum injection quantity, while these are affected by remanent magnetism in the fixed core, surface tension of the fuel, etc. With reference to a fuel injection valve with a pipe-shaped member to enclose a fixed core and a movable part and further with coils and yokes to cover up the above pipe-shaped member, the anchor to drive the movable member has a plurality of through holes for fuel passage extending in the axial direction, while these through holes are arranged at a certain intervals in the circumferential direction, and projections formed to constitute a contacting surface to touch the fixed core arranged randomly in between the through holes.

Using a swirl type fuel injection valve, a concentrated spray area and a thin spray area are formed, the positions thereof are adjusted, and the spray is made to conform to the geometric shape of the engine and mounting position of the fuel injection valve, so as to reduce the fuel consumption and control the unburnt components in exhaust gas. The fuel injection valve is so constructed that a step is formed on the injection hole opening of the fuel injection valve, so as to provide two or more edge transition portions at the injection hole opening, resulting from the step, and the line connecting the edge transition portions forms an oblique angle relative to the wall formed by the step perpendicular to the injection hole center axis and the angled wall.

Fuel injection valve with restriction wall, and internal combustion engine equipped therewith

It is an object of the present invention is to provide a fuel injection valve and its apparatus, and an internal combustion engine, a method for manufacturing the fuel injection valve and its nozzle body, and a method for manufacturing the same capable of securing highly accurate and stabilized fuel spraying characteristics. The fuel injection valve comprises a nozzle body, an injection hole provided in the nozzle body, a valve body for opening and closing a fuel passage from the injection hole relative to the nozzle body, and a drive means for driving the valve body, wherein formed is a protrusion having an opening in communication with the downstream side of the injection hole of the nozzle body and which part of the side and an extreme end are opened. The invention resides in a nozzle body and manufacturing it by plastic processing, and an internal combustion engine using the same.

Fuel injection valve and its apparatus, method for manufacturing internal combustion engine and fuel injection valve and its nozzle body, and method for manufacturing the same

When voltage changes occur in the battery used as a power supply in a fuel injection system, the amount of fuel injection also changes and the required amount of fuel injected cannot be obtained. To eliminate this problem, a fuel injector system is provided which has a fuel injection valve with at least one coil, a power supply, a power supply voltage detector, and a control unit for controlling the fuel injection valve. The control unit sets a reference value of a power supply voltages, and the above-mentioned fuel injection valve is controlled so as to obtain the required ampere-turns by reducing the resultant inductance of the coil when a power supply voltage detection value is less than the above-mentioned reference value, and the resultant inductance of the coil is increased when the power voltage detection value is greater than the reference value.

Fuel injector and its control method

In order to provide a fuel injection method of an internal combustion engine having higher combustion stability which can direct a part of concentrated fuel spray toward an ignition plug according to a fuel injection atmosphere, a fuel injection valve thereof, and an internal combustion engine, the present invention provides a fuel injection method of an internal combustion engine for injecting fuel so as to generate a part of high spray concentration and a part of low spray concentration on the cross section of spray by giving swirling force to fuel from an injection hole at the front end of a fuel injection valve, comprising the step of setting a reference indicating the position of a axis of the fuel injection valve indicating the injection direction of the part of high spray concentration in the rotational direction when fuel is injected into an atmosphere under the atmospheric pressure.

Fuel injection method of internal combustion engine, fuel injection valve of the same, and internal combustion engine

To produce a fuel spray that is asymmetrical in the flow rate distribution of a sprayed fuel in order to improve the homogeneity of air-fuel mixture density during the air intake stroke injection for homogeneous combustion in an in-cylinder injection engine, the exit portion of the fuel injection hole is provided with the wall surfaces, andthat are parallel to the central axis of the injection hole. Also, the periphery of the injection hole is provided with a plurality of areas in which the flow of the fuel in the radial direction of the injection hole will be restrained, and an plurality of areas in which the flow of the fuel in the radial direction of the injection hole will not be restrained, and a different size is assigned to each non-restraint area.

Fuel injector

Using a swirl type fuel injection valve, a concentrated spray area and a thin spray area are formed, the position thereof are adjusted, and the spray is made to conform to the geometric shape of the engine and mounting position of the fuel injection valve, so as to reduce the fuel consumption and control the unburnt components in exhaust gas. The fuel injection valve is so constructed that a step is formed on the injection hole opening of the fuel injection valve, so as to provide two or more edge transition portions at the injection hole opening, resulting from the step, and the line connecting the edge transition portions forms an oblique angle relative to the wall formed by the step perpendicular to the injection hole center axis and the angled wall.

Manufacturing method of a fuel injection valve; and a fuel injection valve and an internal combustion engine equipped therewith

A fuel spray is directed toward an ignition plug. To an injection bole outlet portion of a swirl type fuel injector, an L-shaped cut out is provided, and the fuel spray is formed with a deflection fuel spray which has a strong swirl component that can inject with a large quantity. Accordingly, a reduction in the discharge HC amount and an improvement in the fuel consumption can be attained.

Internal combustion engine

Atomizing air flowing in an atomizing gas passage is merged with a fuel spray to promote atomization of the fuel, and carrier air flowing in a carrier gas passage is merged with the fuel spray at a further downstream position so as to surround the fuel spray. By doing so, the atomized fuel spray is carried to the downstream side so as to prevent the fuel spray from adhering onto the wall surface. The starting-up performance, fuel consumption and exhaust gas cleaning of an internal combustion engine are improved in this way.

Fuel supply device and internal combustion engine mounting the same

The liquid crystal is written with a laser beam. The laser beam generated by a laser source is applied through an optical control unit such as galvanometer mirrors to the liquid crystal. To erase a part of the data written in the previous time completely, the liquid crystal is irradiated with the laser beam slightly wider than the portion that was thermally written on the liquid crystal in the previous time.

System for partially erasing thermally written liquid crystal element

Growing community of inventors

Kitaibaraki, Japan

Toru Ishikawa