Hitachi, Ltd.

Other

Hitachi Car Engineering Co., Ltd.

Hitachi Automotive Engineering Co., Ltd.

Hiatchi, Ltd.

Yoshiyuki Tanabe

Yoshio Okamoto

Yasunaga Hamada

Makoto Yamakado

Hiromasa Kubo

Yuzo Kadomukai

Kenji Tabuchi

Hiroshi Fujii

Atsushi Sekine

Mineo Kashiwaya

Koji Onishi

Yzo Kadomukai

Toshio Ishii

Noriyuki Maekawa

Mamoru Fujieda

Nobukatsu Arai

Yasuo Namaizawa

Toshio Takahata

Matsuharu Abo

Yutaka Ito

Hiroshi Sasaki

Motoyuki Abe

Tohru Ishikawa

Kenichi Kawashima

Kiyomi Morita

Mitsuyoshi Shouji

Junichi Yamaguchi

Mizuho Yokoyama

Kiyoshi Amou

Kinsaku Yamada

Hisato Tsuruta

Masahiro Tsuchiya

Tosuke Hirata

Katsunobu Kameta

Minoru Ohsuga

Toshiharu Nogi

Hiroshi Kuroiwa

Takuya Shiraishi

Hisanobu Kanamaru

Yoshishige Oyama

Kazuo Tahara

Kiyotaka Ogura

Koji Nakagawa

Tokuo Kosuge

Kenichi Gunji

Hiroshi Ohki

Toru Ishikawa

Satoshi Suzuki

Kimiji Karino

Hiroshi Kamifuji

Jun'ichi Yamaguchi

Eiichi Kubota

Keiichi Uraki

Keigo Naoi

Masayuki Shizuka

Yoshikazu Aochi

Tooru Ishikawa

Masafumi Nakano

Akira Hikichi

Takeshi Kikuchi

Hitoshi Maeda

A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element in the direction opposite to that of the force applied by the force-applying member; wherein a secondary oscillation system, which interacts with a primary oscillation system including the valve element and the force-applying member, is added to the primary oscillation system, and the phase angle of force applied to the primary oscillation system by the secondary oscillation system is also staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system, whereby the bouncing of the valve element during opening and closing of the valve is reduced, which in turn makes it possible to achieve very accurate fuel-injection control.

Fuel-injection valve

In the fuel cylinder injection engine with the supercharging machine, the ignitability deteriorates because the density of the fuel at the spray center becomes excessive due to the shrinkage of the fuel spray under the supercharging. As a result, the density of the smoke and the hydrocarbon exhaust rate increase. The mixture of the fuel and the air under the supercharging is promoted by the control by TCV installed in the suction port which is a divided spray and air flow generation mechanism and the valve timing control of the suction and exhaust valve, etc.

Internal combustion engine and fuel injection control device therefor

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

A fuel swirler positioned upstream of an injection orifice is disposed at the tip of a nozzle body in a fuel injector, in which the fixed core and the nozzle body are coupled to each other via a non-magnetic cylindrical seal ring press-fitted and welded to the outer circumference of one end on the nozzle body side of the fixed core and the inner circumference of one end of the nozzle body. The inner circumference of the fuel swirler and the inner circumference of the seal ring function serve as a guide for slidably guiding a stroke movement of the needle. The fuel swirler is held between the receiving surface of the nozzle body and the orifice plate, thus defining an annular fuel passage between the outer circumference of the fuel swirler and the inner circumference of the nozzle body, so that fuel flows into a passage groove formed at the lower end surface of the fuel swirler via the annular fuel passage. A mass movable in an axial direction independently of the needle is interposed between the return spring and the needle, and a plate spring is interposed between the mass and the needle.

Fuel injection valve

An internal combustion engine which injects fuel directly into a cylinderand ignites air-fuel mixture formed in the cylinder, wherein each fuel injection of said internal combustion engine comprises a lead spraywhich moves faster and a main spraywhich moves slower, the lead sprayis oriented towards an ignition plug, and the air-fuel mixture made by pre- and main sprays is ignited twice or more. This invention of the above configuration can provide a simple and inexpensive direct cylinder injection type internal combustion engine which reduces abrasion of electrodes and consumption of electric power while assuring stable fuel combustions even when ignition timing is retarded.

Cylinder direct injection type internal combustion engine

A control apparatus for a direct injection engine having an intake valve, an exhaust valve and a fuel injection valve for injecting fuel directly into a cylinder of the engine and in which fuel injection by the fuel injection valve is performed during intake stroke or during compression stroke of the engine, has combustion stabilizing device for stabilizing combustion in the cylinder. The combustion stabilizing device has next operation mode determination device for selecting either an operation mode of recovering the combustion stability by fuel injection during intake stroke or an operation mode of recovering the combustion stability by fuel injection during compression stroke when a deteriorated state of combustion is detected in fuel injection during compression stroke.

Control apparatus for a direct injection engine

An electromagnetic fuel injector is provided with a first coil having a large rate of change in time of magnetomotive force and a second coil having a smaller rate of change in time of magnetomotive force than the first coil. During a valve opening operation at the time of opening the valve, current is passed through at least the first coil, and then current of a smaller current value than in the opening operation is caused to flow so as to hold the valve open, using the first and second coils.

Fuel injection apparatus, fuel injection method and internal combustion engine

A fuel injection apparatus including a controller to output an injection time command signal and an opening movement time command signal to command an opening movement time from a closed state to an open state of an electromagnetic fuel injection valve and a control circuit, coupled to the controller, to change an electric current flowing in a coil of the electromagnetic fuel injection valve between when the electromagnetic fuel injection valve is closed and opened. The controller sends both the injection time command signal and the opening movement time command signal through the same signal line to the control circuit.

Electromagnetic fuel injector and control method thereof

The target peak current value, where a current value is reduced in conformity to a drop in the voltage of a battery is stored in target peak current storage unit . ON-signals are sent from current control circuit to power transistor in response to the injection command pulse coming from engine controller so that current is applied to coil . Then, the current flowing to coil is detected by the current detecting resistor . Comparator compares this detected current and the target peak current value read from the target peak current storage unit conforming to the voltage of battery . If agreement is found between these two values, OFF-signals are sent to power transistor from current control circuit in response to the switching command coming from comparator . Then, On/Off signals to effect holding of the coil are sent from current control circuit to power transistor . The linearity of the injection volume despite changes in battery voltage can be maintained.

Fuel injector and internal combustion engine

Using a control coil having a high response characteristic suited to the valve opening and a hold coil suited to a hold to be held a large force by a small large current, during the valve opening time a high voltage is applied to the control coil suited to the valve opening and during a valve opening hold time a low and stabilized voltage is applied to the hold coil suite to the holding, and then a valve body driven. In a fuel injection apparatus, a drive manner during a valve opening time and a hold time is optimized.

Electromagnetic fuel injection apparatus, an internal combustion engine having an electromagnetic fuel injection apparatus, and a drive circuit of an electromagnetic fuel injection apparatus

The invention provide a control system for a direct fuel injection engine employing a valve varying mechanism, which can suppress mixing of burned gas and fresh air to maintain the combustion stability, can accelerate vaporization of sprayed fuel at the beginning of fuel injection to reduce the emission rate of HC, and can realize a reduction of NOx based on the effect of exhaust return. The control system for the direct fuel injection engine comprises a fuel injector. for directly injecting fuel into a combustion chamber, and valve varying drivers for variably controlling the opening/closing timing of each of an intake valve and/or an exhaust valve. A control unit controls the valve varying mechanism unit to introduce burned gas from an exhaust port into the combustion chamber and to inject the fuel during a compression stroke for effectuating stratified charge combustion. The control unit controls the valve varying drivers to provide a phase difference in the opening timing of two left and right valves constituting the intake valve and/or the exhaust valve, thereby generating a flow of the burned gas along a cylinder wall.

Control system for direct fuel injection engine

A fuel injection valve for a direct gasoline injection engine, a direct injection engine, and an automobile using the same. The fuel injection valve can prevent the deposits produced during combustion of gasoline from accumulating on the surface of the fuel injection valve, or easily remove the deposits therefrom. A reaction-bonded layer of perfluoropolyether compounds having alkoxy silane as its terminal group is provided on the surface of the fuel injection valve of the invention.

Fuel injection valve coated with anti-fouling perfluoropolyether film layer and associated method, and direct injection engine using same

An electromagnetic fuel injection valve in an engine injects fuel by opening/closing a fuel flowing path with a valve element. A controller controls opening/closing of the fuel flowing path and changes magnetic force generated by a control coil driving the valve element so that the magnetic force is less during a valve open state-holding period than at an initial valve-opening time. The controller detects the voltage of a battery and applies the voltage fed from the battery to the control coil, while changing a time interval (Tc), for which current is passed through the control coil, based on the detected voltage, in order to change the magnetic force, without raising the voltage from the battery. The controller also detects increase/decrease of a pressing force on the valve element caused by fuel pressure and changes the time interval (Tc) accordingly.

Growing community of inventors

Hitachinaka, Japan

Yoshiyuki Tanabe