Kabushiki Kaisha Toyota Chuo Kenkyusho

Toyota Jidosha Kogyo Kabushiki Kaisha

Kabushiki Kaisha Tokai Rika Denki Seisakusho

Aichi Steel Corporation

Aichi Steel Works, Ltd.

K.k. Toyota Chuo Kenkyusho

Aichi Micro Intelligent Corporation

Nicolet Japan Corporation

Kazumasa Sumi

Yoshinobu Honkura

Yasutaka Hayashi

Takayuki Kato

Kazuo Miki

Katsuhiko Fukui

Masaki Mori

Hideo Arakawa

Michio Ishiguro

Michiharu Yamamoto

Tomohiko Nagao

Toshimitsu Ito

Norio Sato

Masakatsu Sanada

Kazukata Takei

Masanori Miyashita

Atsushi Murase

Hideki Fujii

Yoshiaki Koutani

Shouzo Naito

Osamu Nomura

A magnetic sensor includes a magnetic sensitive memberincluding an amorphous wire, a detection coilwound around the magnetic sensitive member, and a sample-and-hold circuit for detecting a voltage induced in the amorphous wirewhen a pulse current is interrupted. The sample-and-hold circuit has a sample-and-hold unit Band a delay circuit. The sample-and-hold unit Bincludes an electronic switch S, a capacitor C, a resistor R, a resistor R, and a high-input amplifier A. The delay circuit includes a resistor Rconnected to a control terminal of the electronic switch Sand a capacitor C

Magnetic sensor

The present invention is a magnetic field detection device that makes use of a frequency characteristic affording circuit in order to selectively detect magnetic signals from a frequency domain accurately at a high level of sensitivity. The present invention has a magneto-impedance element, a detector coil and a negative feedback coil which is wound around the magneto-impedance element, and a frequency characteristic affording circuit which affords a frequency characteristics on the negative feedback signal of a negative feedback connecting an output terminal thereof with the negative feedback coil. Using filters as the frequency characteristic affording circuit, the following are possible uses of this magnetic field detection device: a geomagnet detection device for earthquake prediction (using a high-pass filter), a bill validation apparatus for vending machines, etc. (using a low-pass filter), and a magnetic oscillation detection device for a magnetic gate system (using a band-reject filter).

Magnetic field detection device

Infrared spectroscopy for rapidly identifying the kind of a plastic product on the spot. The surface of the plastic product is partially pyrolyzed in a quite short time to produce pyrolysis product gas. The gas is introduced into an infrared spectrophotometer to obtain an infrared absorption spectrum of the gas. The spectrum is collated with a pyrolysis infrared absorption spectrum of a standard sample. Thus, the plastic is identified. A heating probe comprising a heat radiation emitter mounted in the body of the probe, an opening formed in the body of the probe, an aperture formed in the body and located opposite to the opening, a reflecting mirror for directing the radiation into the opening, and a conduit for connecting thin ports in the probe with the spectrophotometer and with an external carrier gas source. The heat radiation emitter emits heat radiation for pyrolyzing the surface of the plastic product. The mirror is located near the aperture.

Method of rapidly identifying resins by infrared spectroscopy and system

Permeameter suited for measuring permeability of a small, non-magnetic (i.e., the permeability value is close to 1) object. The probe of the permeameter is of the differential transformer type with an exciting coil and two detecting coils placed at both ends of the exciting coil. The difference in the outputs of the detecting coils is analyzed and the effect of the eddy current is effectively eliminated, whereby the signal representing the permeability of the object is extracted from the difference signal by the phase shift analysis. By reducing the distance between the two detecting coils, the influence of the disturbance of the eddy current at the boundary of the object sample is minimized and the permeameter can measure a small object sample without sacrificing accuracy and sensitivity.

Permeameter having a differential transformer probe with a reduced

A rear wheel steer angle controlling apparatus for vehicles having steerable front and rear wheels, adapted for controlling the steer angle of rear wheels in response to the operation of the steering wheel for steering the front wheels. When the steering wheel is operated quickly, a rear wheel steer angle is formed in the counter direction to the direction of the front wheel steer angle, so that the response to the steering input for turning the vehicle is improved. Conversely, when the steering wheel is operated slowly, a rear wheel steer angle is formed in the same direction as the front wheel steer angle, thus enhancing the stability of the vehicle running straight. When the vehicle is running at a high speed, the rear wheel steer angle is formed always in the same direction as the front wheel steer angle regardless of the speed of operation of the steering wheel, so that the steering stability during high speed running is improved. When a yawing moment is generated due to a disturbance such as lateral wind, the rear wheel steer angle is automatically controlled in such a manner as to negate the yawing moment, thus compensating for the lateral displacement of the vehicle without requiring correcting steering operation by the driver.

Apparatus for controlling steer angle of rear wheels of vehicle

A rear wheel steer angle controlling apparatus for vehicles having steerable front and rear wheels, adapted for controlling the steer angle or rear wheels in response to the operation of the steering wheel for steering the front wheels. The speed with which the steering wheel is turned is detected and compared with a reference value which varies in accordance with changes in a physical amount related to the vehicle velocity. When the speed of operation of the steering wheel is larger than the reference value, a rear wheel steer angle is formed in the counter direction to the direction of the front wheel steer angle, so that the response to the steering input for turning the vehicle is improved. Conversely, when the speed of operation of the steering wheel is smaller than the reference value, a rear wheel steer angle is formed in the same direction as the front wheel steer angle, thus enhancing the stability of the vehicle running straight.

An apparatus for controlling steer angle of rear wheels of a 4-wheel steering vehicle in accordance with the operation of a steering wheel for generating steer angle of front wheels. The apparatus comprises a first member which moves in response to the operation of the steering wheel; a second member which moves in response to the operation of the steering wheel in a direction counter to that of the first member; an output shaft for controlling the steer of the rear wheels; a resilient member disposed between the first member and the output shaft and a controller disposed between the second member and the output shaft for controlling the direction of movement of the output shaft in accordance with the speed of operation of the steering wheel. When the steering wheel is operated at high speed, the resilient member absorbs the force from the first member so that the output shaft moves in the same direction as the second member, whereby the rear wheels are turned in a direction counter to that of the front wheels. When the steering wheel is operated at low speed, the force from the second member is damped so that the output shaft moves in the same direction as the first member, whereby the rear wheels are turned in the same direction as the front wheels.

Apparatus for controlling steering angle of rear wheels of a vehicle

A knocking control device having a knocking detecting circuit for detecting, as an electrical signal, an amount of variation corresponding to an internal pressure variation within a cylinder of an engine due to an engine knocking; an averaging circuit for converting the electrical signal from the knocking detecting circuit to a signal corresponding to a knocking energy; a crank angle detecting circuit for detecting a rotation phase of the engine; a comparison circuit for comparing the output signal corresponding to the knocking energy of the averaging circuit with a reference value defining a knocking allowable level to obtain a control signal for maintaining an engine knocking strength in a predetermined range; and an ignition control circuit connected to an ignition circuit, for controlling the ignition timing of the ignition circuit by the control signal from the comparison circuit. The present invention can detect the knocking strength with high accuracy as an electrical signal based on the cylinder internal pressure variation due to knocking and can carry out a knocking strength control suitable for characteristics of an engine by using the electrical signal. Also the present invention can remarkably improve an engine combustion efficiency and fuel consumption percentage by accepting a knocking to some extent.

Knocking control device

An engine knocking meter detects a pressure in a cylinder by a pressure sensor, clips a detected signal by a clipping circuit to cut low level noises, supplies an output signal of the clipping circuit to a filter circuit to eliminate noises having frequencies which lie beyond a frequency band of a knocking signal, and supplies an output signal of the filter circuit to a gate which is driven within a given crank angle under the control of a signal from a crank angle sensor mounted on a crank shaft of an engine, for separating the knocking signal.

Engine knocking meter

Growing community of inventors

Nagoya, Japan

Kazumasa Sumi