Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki K.k.

Hisato Umemaru

Masayoshi Onishi

Mitsuharu Morishita

Shinichi Kohge

Tadayuki Hara

Yasuaki Hata

Yukiharu Akiyama

Hiromasa Ozawa

Kazuhiro Watanabe

Yasuhiro Shiraki

Masaharu Yuhara

Yoshimitsu Takahata

Yasuaki Gotoh

Kazuhito Okishio

This invention provides an electronic control unit is capable of suppressing electromagnetic noise having a frequency band used in a portable wireless apparatus, and capable of exhibiting a noise resistance property against electromagnetic noise. The electronic control unit including a constant voltage power supply circuit portion, an analog signal inputting circuit portion, and a conversion processing circuit portion, an analog sensor and a driving power supply being connected to the outside, and the unit being connected to the analog sensor through a power supply line and a signal line, in which the analog signal inputting circuit portion includes a current limiting circuit portion, an integrating circuit portion, a current limiting resistor, a signal noise absorbing circuit, and a first bypass capacitor, and capacitance (C) and parasitic inductance (L) of the first bypass capacitor are set in a range of 7&#xd7;10&#x3c;1/[2&#x3c0;&#x221a;(LC)]&#x3c;35&#xd7;10.

Electronic control unit

A pressure sensor apparatus having capability of preventing invasion of foreign materials into a pressure sensor with a simplified structure includes the pressure sensor () for detecting pressure of a fluid for measurement, and a sensor container () for housing therein the pressure sensor (). The sensor container () is connected to a pressure intake port () formed in a pipe () through which the fluid for measurement flows. The sensor container () includes a wall () for defining a second compartment () located in opposition to the pressure intake port () and a first compartment () having a pressure introducing port () for introducing the fluid for measurement extracted through the pressure intake port () to the pressure sensor ().

Multi-compartment pressure sensor housing apparatus

To suppress the projection of an O ring when a plurality of O rings fitted onto a pipe are inserted into the respective O ring storage chambers of a cup, first and second O ring storage chambers corresponding to the plurality of O rings are formed in the cup, and the line diameter of an O ring which is inserted later is made larger than the line diameter of the O ring which is first inserted.

Pressure sensor

The invention is directed to a pulse generator provided with a connecting member electrically connecting the lead and coil having an entwining section at one end thereof at the portion different from where an end of the coil is fixed, around which wound the middle portion of the coil drawn out to be connected to the lead, whereby a stress added to the drawn out coil is absorbed by the coil twined around the entwined portion, to be prevented from cutoffs of the coil fixed to the one end of the connecting member. A reinforcing member can be applied to the connecting member at an end thereof where the coil is fixed, to reinforce the bending strength of the end portion of the connecting member thereby to prevent cutoffs of the coil. Furthermore, the pulse generator may be provided with a bobbin having a protrusion at the edge of one flange thereof the drawn out coil twining around thereby to maintain the winding strength of the coil to facilitate the following work. In addition, the drawn out coil is prevented from being rubbed by the edge of the flange to be cut off.

Pulse generator for use in a speed sensor

A pulse generator is constructed and arranged such that, by bringing a piece to be detected into contact or making it disconnect with regard to a detecting head at the tip end of a magnetic iron core, the magnetic flux in interlinkage with a detecting coil is caused to change, and by bending almost at right angles a terminal in connection with both the detecting coil and a leading wire, the tension occurring on the leading wire is not transmitted to connections between the detecting coil and the terminal.

Pulse generator pick up coil assembly

A steering torque detector includes input and output shafts, a torsion bar connected between the input and the output shafts, a printed circuit board attached to the input shaft or output shaft and resistor layers and electrode as a potentiometer, having a mounting ring made of electric insulator and fitted around both the input and output shafts, and a slider attached to the mounting ring and elastically kept in contact with the resistor layers at the slider. The potentiometer includes main and auxiliary circuits each having the resistor layer and the electrode, the resistor layers of both circuits being located at a distance from each other in the radial direction of the detector and extending along mutually concentric circles through the same range of central angle of the detector. The slider includes a main slider kept in contact with the resistor layer of the main circuit at one end thereof, and an auxiliary slider kept in contact with the resistor layer of the auxiliary circuit at one end thereof. Both the main and auxiliary sliders are located at a distance from each other in the radial direction and extending along mutually concentric circles so that the one ends of both the main and auxiliary sliders are positioned on the radial direction.

Steering torque detector

A steering torque detecting apparatus for use in an electrically-operated power steering system of a vehicle. Flexural load which is applied between a pair of input and output shafts during a steering operation is absorbed by the contact between a printed board and the end of a boss portion of a mounting ring for mounting a slider, thereby preventing displacement of the position of contact of the slider with a potentiometer element. The mounting ring is provided with an elastically deformable cylindrical collar portion which surrounds the slider and the printed board is movably disposed inside the cylindrical collar portion to thereby prevent intrusion of foreign matter into the area of contact between the slider and the printed board. A bush for supporting the printed board is rigidly secured to either the input or output shaft through engagement between a positioning groove and a fixing pin and engagement of a bent end portion of the bush with a groove provided in the shaft.

Steering torque detecting apparatus

A steering torque detecting device includes a steering shaft consisting of an input shaft and an output shaft, a torsion bar provided between the input shaft and the output shaft, a torque detecting unit for converting a quantity of torsion produced in the torsion bar into an electric output, an electricity collecting unit including slip rings and brushes which takes the electric output and supplies an electric power from an outer power source, bearings for supporting the input and output shaft on the same axial line, and a housing supporting the bearings, a printed wiring board in a circular plate form which is provided at its one surface with a resistance layer and an output electrode radially spaced apart from the resistance layer, the resistance layer and the output electrode constituting a potentiometer, and a slider having a portion extending in the radial direction of the circular printed wiring board so as to have contacting areas with a small width to the resistance layer and the output electrode.

Steering torque detecting device

A steering torque detecting device comprises a steering shaft consisting of an input shaft and an output shaft, a torsion bar provided between the input shaft and the output shaft, a torque detecting unit for converting a quantity of torsion produced in the torsion bar into an electric output, an electricity collecting unit comprising slip rings and brushes which takes the electric output and supplies an electric power from an outer power source, bearings for supporting the input and output shaft on the same axial line, and a housing supporting the bearings, a printed wiring board in a circular plate form which is provided at its one surface with a resistance layer and an output electrode radially spaced apart from the resistance layer, the resistance layer and the output electrode constituting a potentiometer, and a slider having a portion extending in the radial direction of the circular printed wiring board so as to have contacting areas with a small width to the resistance layer and the output electrode.

Growing community of inventors

Tokyo, Japan

Hisato Umemaru