Hitachi Construction Machinery Co., Ltd.

Hiroaki Yanagimoto

Satoru Kaneko

Hidekazu Moriki

Takashi Ikimi

Noritaka Ito

Yukio Arima

Yuichi Kunitomo

Tetsuyoshi Tominaga

Toshio Kotaka

Toru Kikuchi

Shouya Makihara

A hybrid wheel loader is provided, the hybrid wheel loader achieving high work efficiency even with a short supply of power to be output relative to a vehicle power requirement. The hybrid wheel loader includes a motor generatorconnected to an engine (), a hydraulic pump () connected to the motor generator, a hydraulic actuator () driven by hydraulic oil supplied from the hydraulic pump, a travel electric motor () for driving wheels (), and an electrical storage device () connected to each of the motor generator and the electrical storage device via respective inverters (). When a total requirement power value is greater than a hybrid output upper limit value, either one of a hydraulic requirement power value Pf and a travel requirement power value Prun is limited according to an operation of the wheel loader to thereby set the total requirement power value to a value equal to, or less than, the hybrid output upper limit value.

Wheel loader

[Problem] To provide a hybrid work vehicle which is simple in configuration, good in ease of mounting on a vehicle and capable of efficiently transmitting motive power. [Solution] The hybrid work vehicle includes: an engine (); a hydraulic pump () which is driven by the engine; a work device () which is disposed at the front of the vehicle and performs work using the hydraulic pump as a drive source; a motor/generator () which generates electric power by use of the torque of the engine; and a travel drive device which causes the vehicle to travel by rotating and driving wheels by use of the electric power generated by the motor/generator. The hybrid work vehicle is steered while the vehicle bends by way of a center joint (). The travel drive device includes: a plurality of electric motors (and); and a propeller shaft () which is linked with the plurality of electric motors and transmits motive power from the plurality of electric motors to the wheels. The plurality of electric motors are disposed at the front and rear sides of the center joint with the center joint being disposed therebetween.

Hybrid work vehicle

[Problem] To provide a hybrid wheel loader capable of highly efficient and stable supply of motive power. [Solution] A hybrid wheel loader including: a front work machine () provided at the front of a vehicle; power sources including an engine () and an electric storage device; and a hybrid control device () which controls output of these power sources; characterized in that: a capacitor () is provided as the electric storage device; and the hybrid control device makes control to decrease a voltage of the capacitor in accordance with increase of energy held by the vehicle.

Hybrid wheel loader

An ultrasonic inspection and imaging instrument is characterized by storing reduced image examples (images by means of reduced image display data obtained by scaling down picture display data) of an ultrasonic measurement picture beforehand, together with measurement conditions at the time the measurement picture is obtained prior to a scale-down imaging process. When the measurement is started or the measurement conditions are otherwise changed, the measurement conditions are set as those obtained from the measurement picture prior to the scale-down processing with one of the reduced image examples thus selected as an index while a list of image examples is indicated on a display and read from a memory unit for ultrasonic measuring purposes. When a reduced image example or what is similar to the example desired by an operator is selected, proper measurement conditions are automatically set in the ultrasonic inspection and imaging instrument. When the operator wants to change or switch the measurement picture, moreover, he/she is able to make ultrasonic measurement on confirming what the subsequent image is like or what an image is desired to be selected by means of the reduced image example beforehand.

Ultrasonic inspection and imaging instrument

An ultrasonic inspection and imaging instrument scans an object under examination, the object having an inspection plane at a predetermined depth, in the direction slanted to the depth (slant scanning), in such a way as to cause rectilinear scanning as viewed from the plane. Measured data on a peak value corresponding to each measurement point obtained from the slant scanning are displayed in the form of a picture on the screen of a display relative to each measurement point. The image displayed on the picturee at that time is most clearly demonstrated, provided an image portion in the vicinity of a test portion corresponding to a test surface is brought into focus in the depth direction. An operator selects the image portion clearly indicated out of the picture displayed on the display, and inputs the position of the image thereon to an input unit, whereby an image processor bases the positional information about the display data thus fed and the relevant information indicating the positional relationship in the depth direction on obtaining the position of the probe in the depth direction when the measured value resulting from the image is collected. The image processor positions the probe there, so that the probe is automatically focused on the test surface.

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Kasumigaura, Japan

Hiroaki Yanagimoto