Koike Sanso Kogyo Co., Ltd.

Hino Jidosha Kogyo Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Yamatake Corporation

Voike Sanso Kogyo Co., Ltd.

Tetsuo Koike

Akira Furujo

Ryuta Hirai

Masatoshi Motoyama

Kazuya Kashimata

Hiroshi Uchino

Takayuki Suzuki

Atsuomi Obata

Kouzou Kawata

Masashi Shigemori

Kohji Sasaki

Sadayoshi Iketani

Atsushi Masuda

Hisashi Matsuno

Satoshi Masuda

Isao Joko

Koichi Yamaguchi

Kunitoshi Shimizu

Yousuke Kusano

Tetsu Sugihara

Kiyoshi Dezuno

The present invention relates to a cutting method for cutting an upper edge and a lower edge of a cutting plane into a curved shape, when a cutting object is cut by supplying plasma gas to the periphery of an electrode of a plasma torch and ejecting plasma arc from a nozzle. In order to melt the upper edge and the lower edge of the cutting plane to form a curved shape, at least one condition selected from plural conditions including a cutting electric current, cutting speed, height of a plasma torch, angle of the plasma torch, and flow rate of plasma gas upon performing the vertical cutting for forming the upper edge and the lower edge of the cutting object substantially at right angles is changed.

Plasma cutting method and plasma cutting apparatus

Provided is a mobile workbench constructed so as to determine that an accident of some kind has occurred and to stop if the speed of the mobile workbench suddenly changes. A mobile workbench (A) travels on a material (Ca) to be processed and performs predetermined processing (welding) by using a processing tool (welding torch (B)) mounted thereon. The mobile workbench (A) comprises: a workbench main body (); a plurality of wheels () which are provided on the workbench main body (); a drive motor () which drives the wheels (); an acceleration sensor () which detects the acceleration acting on the workbench; and a control unit () which is constructed so as to determine that an abnormality has occurred and to stop the drive motor () if a sudden change in speed is detected by the acceleration sensor ().

Mobile workbench

Outer nozzle for plasma torch

Electrode for plasma torch

Inner nozzle for plasma torch

Plasma torch body

A relay device for a concatenated sensor system includes first and second relay units ( ) and a relay cable ( ) connecting the two relay units. When the first relay unit is located in intimate contact with one side of a sensor unit ( ) that is situated at one end of a sensor unit group ( ) or with one side of a master unit ( ), a linking connector of the relay unit is connected to an input-output connector provided on one side of the master unit or on one side of the sensor unit. When the second relay unit is located in intimate contact with the other side of a sensor unit that is situated at the other end of a sensor unit group ( or ), a linking connector of the relay unit is connected to an input-output connector provided on the other side of the sensor unit. Thus, electrical connection between the master unit and the sensor unit group and between the sensor unit groups of the concatenated sensor system can be established with reliability.

Repeater of tandem sensor system

A control system for a vehicle-mounted battery which, in accordance with the state of a battery, can make a polyphase alternating current rotating machine in a hybrid car assist the driving gear (the internal combustion engine) or charge the battery. The current and voltage during discharge and charging of a battery mounted on a vehicle are measured, and on the basis of this measured current and voltage information, a program control circuit controls the discharge current when an auxiliary driving force is given to the driving gear. This control is performed via an inverter which performs AC-to-DC or DC-to-AC conversion between the battery and the polyphase alternating current rotating machine coupled to the driving gear of the vehicle. Because the charging and discharging currents are limited in accordance with the state of charging of the battery, it is possible to avoid charging and discharging uniformly irrespective of the amount of charging of the battery. In addition, charging efficiency can be increased and the working life of the battery lengthened.

Control system for a vehicle-mounted battery

The state of charging and discharging of a secondary cell circuit varies with battery deterioration and with the margin for charging and discharging. The state of charging and discharging is detected accurately without coming into contact with any unit cells, and maintenance and inspection can be performed efficiently. Charging and discharging characteristics of the battery are held in a memory, and charging current and discharging current are controlled by comparing measured voltage and current values with the charging and discharging characteristics held in the memory. Furthermore, battery information relating to each unit cell is transmitted by radio signals and the substance of this information is displayed at the driver's seat.

Charging and discharging of a battery are controlled while observing the state of the battery, thereby improving its efficiency and increasing battery service life. A program control circuit acquires vehicle speed from a vehicle speed sensor and the rotational speed of the internal combustion engine from a rotation sensor. The program control circuit controls an inverter which performs AC-to-DC or DC-to-AC conversion between a motor-generator coupled to the internal combustion engine and a battery mounted on the vehicle. At the same time, the program control circuit acquires the charging and discharging current (i) of the battery, which is detected by a current sensor, and calculates the time integral I of the charging and discharging current (i). The circuit controls the charging current to the battery during regenerative braking, and the discharge current when the vehicle is being driven, in accordance with a function of the time integral I. The overall life of the battery can be lengthened, and the energy lost by the brakes can be most effectively regenerated. Moreover, even if there is variability in the characteristics of the unit cells, its increase can be held in check. In addition, battery costs can be reduced and maintenance simplified.

Control system for on-vehicle battery

This invention relates to an electric braking and auxiliary engine mechanism for a motor vehicle including a rotary machine coupled with the crank shaft of the internal combustion engine which drives the axle of the vehicle. This mechanism is characterized in that squirrel-cage polyphase induction machine is used as the rotary machine which is fixedly connected to the crank shaft, and the squirrel-cage polyphase induction mechanism is fed with a revolving magnetic field which is variable either positive or negative direction by an invertor, so that the squirrel-cage polyphase induction machine may be utilized either as a power generator or a motor.

Electric braking and auxiliary engine mechanism for a motor vehicle

Growing community of inventors

Tokyo, Japan

Tetsuo Koike