Hitachi, Ltd.

Nissan Motor Company Limited

Seiji Suda

Noboru Sugiura

Toshio Furuhashi

Takeshi Atago

Takao Sasayama

Yasunori Mouri

Tomoji Inui

Masami Nagano

Matsuo Amano

Masahide Sakamoto

Hirohisa Yamamura

Osamu Igarashi

Keiichi Tokuyama

Yutaka Nishimura

Shotaro Naito

Masami Shida

Yuichi Kitahara

Yuusuke Takamoto

Yuichi Kashimura

Yoshiya Takano

Masaru Kugo

Junichi Makino

Yasunori Mori

Hiroastu Tokuda

Kouzou Katogi

Hiroshi Kuroiwa

Makoto Shioya

Toshio Ishii

Motohisa Funabashi

Kazuhiko Sato

Kenji Ikeura

Shinichi Sakamoto

Kaoru Uchiyama

Yoshihisa Kawamura

Masayuki Miki

Kazutoshi Kobayashi

Mitsukuni Tsutsui

Osamu Abe

Taiji Hasegawa

Shizuhisa Watanabe

Masumi Imai

Hitoshi Minorikawa

Takashi Yoshinari

Hiroshi Ito

Masao Adachi

Hideyuki Ouchi

Akihiko Konno

Hiroshi Fujiwara

Terumi Okado

Tomoyuki Okada

Nobuo Satou

Osame Abe

Kouzo Katogi

An engine control device provided with a lean NOx catalyst comprises means for estimating a condition of the lean NOx catalyst, means for performing reactivation control of the lean NOx catalyst based on the result, and means for controlling the termination of the reactivation control. The lean NOx catalyst is constantly made usable in a favorable condition.

Engine control device

Disclosed is a driving torque control device for a vehicle comprising the elements. The device can effectively suppress fluctuation of engine torque. (1) Means for calculating a torque control timing to determine and output at least two control timings of an engine torque generated by an engine during speed shifting. (2) Means for calculating and outputting an engine torque control quantity in response to the output from said torque control timing calculating means to calculate and output the engine torque control quantity (3) Means for controlling the engine torque during speed shifting in response to the outputs from said engine torque control quantity calculating means. The engine torque is reduced by a certain quantity at a first timing of said engine torque control timings, followed by increasing the engine torque at the second engine torque control timing, and then returning the engine torque to the engine torque of the time immediately before the first engine torque control timing.

Driving torque control device and method for controlling driving torque

An air flow sensor unit for an internal combustion engine control system which detects an air flow rate and outputs an optical signal corresponding to the detected air flow rate to an external equipment including a bridge circuit including a temperature sensitive resistor which detects the air flow rate and outputs a first electrical signal indicative of a voltage amplitude corresponding to the detected air flow rate; a first converting circuit which converts the first electrical signal outputted from the bridge circuit into a second electrical signal indicative of a digital value corresponding to the voltage amplitude of the first electrical signal; a second converting circuit including a laser diode, for converting the second electrical signal outputted from the first converting circuit into the optical signal having the same digital value as that of the second electrical signal; a housing for accommodating the bridge circuit, first converting circuit and second converting circuit; and an apparatus of a lens and optical fiber cable secured integrally to the housing for transmitting the optical signal outputted from the second converting circuit to an external equipment.

Physical quantity sensor arrangement

Analog circuit of a thermal type intake air flow sensor for detecting a quantity of air drawn into an automotive engine is formed as a part of the input hardware of a microcomputer for control of the engine, and the analog circuit is used for operations which need to be performed at high speed, while adjustment, an output process, etc. are executed under the same operating system as is used for engine control.

Thermal type intake air flow measuring instrument

Thermal type intake air flow measuring instrument and internal

A suspension control apparatus for a vehicle comprises a measuring unit for measuring relative motion between sprung mass and unsprung mass at each of wheels, a decision unit for discriminatively determining occurrence and convergence of at least one of rolling or pitching and bouncing or unsprung mass vibration on the basis of measurement data available from the measuring unit, and a control unit for controlling at least one of damping coefficient and spring constant in the suspension characteristics on the basis of the result of decision made by the decision unit.

Suspension control method and apparatus for vehicle

An electronic control apparatus for use in an automobile has a base of a good thermal conductivity having one side disposed in contact with engine cooling water. Semiconductor devices are disposed on the other side of the base so that the semiconductor devices are maintained at the temperature of the engine cooling water, whereby the influence of high ambient air temperature to the semiconductor devices is reduced.

Automotive liquid-cooled electronic control apparatus

A learning map on which the rewriting of data is performed in accordance with the results of an internal combustion engine controlling operation is provided. When the number of pieces of data written in this learning map has become greater than one, the corresponding weighting is done for each unlearned region in the basis of the learning data on the learning already-learned regions, and the data in the already learned regions is written in unlearned region. The controlling of the engine is performed on the basis of the data written in the learning map.

Learning control method for internal combustion engines

An engine control apparatus for assuring stabilized operating performance by detecting the combustion state of gas mixture within an engine cylinder and determining the amount of air supplied to the cylinder in dependence on the detected combustion state.

Engine control apparatus

In an apparatus for controlling an internal combustion engine having a fuel injection control system, the detected number of revolutions is so modified that it becomes higher than an actual number of revolutions when a changing rate of the number of revolutions is larger than a predetermined value and the actual number of revolutions tends upward, and lower than the actual one when the changing rate is larger than the predetermined value and the actual number of revolutions tends downward. The quantity of fuel to be injected is calculated on the basis of the thus modified number of revolutions. According to the present invention, the deceleration shock or surging occurring during the low speed running of an automobile can be effectively diminished without any deterioration of the exhaust gas.

Apparatus for controlling an internal combustion engine

In a color liquid crystal type electronic instrument panel, the quantity of light to be radiated from a background light source is changed in accordance with a color to be displayed. The color liquid crystal type electronic instrument panel is of the type that a plurality of plural-primary-color stripe filters are disposed on each segment of a display element in the longitudinal direction of the segment; a voltage is applied to electrodes corresponding to the stripe filters having a color selected based on the contents to be displayed, and the background light source is positioned at the back of the display element to enable color-displaying. A device for detecting the brightness of outdoor light is further provided in the liquid crystal display type electronic instrument panel, wherein the quantity of light to be radiated from the background light source is changed in accordance with a detected signal by the detecting device.

Electronic instrument panel

An electronic control device for an internal combustion engine provides feedback control of the idle speed using as a reference value an intake air flow rate set in correspondence with the reference value of the idle speed.

Electronic control device for internal combustion engine

A liquid crystal display panel including transparent electrode pairs confronting each other with liquid crystal substance disposed therebetween. At least one of each electrode pair is split into thin line electrode strips with color filters of several kinds of color being disposed thereon or on corresponding positions on the opposite electrode. The panel produces a display in an arbitrary color through the application of a certain combination of color signals between the electrodes selectively.

Multi-color liquid crystal display system

In a segment display type multi-color liquid crystal display device, the area of the display surface of the display device except the areas of segment electrodes is formed so as to present a color identical or similar to a color presented by the segment electrodes in an unselected state. Selected segments can be clearly recognized.

Liquid crystal display device

Growing community of inventors

Mito, Japan

Seiji Suda