Other

Hitachi, Ltd.

Hitachi Device Engineering Co., Ltd.

Youichi Watanabe

Naruhiko Kasai

Masayuki Suganami

Hiroko Sato

Hiroyuki Koizumi

Yasuyuki Nakano

Shinji Wakisawa

Kzunori Irifune

Masahiro Suzuki

Ikuo Tani

Kiyotaka Akimoto

Keiji Yokose

Shunzou Umegaki

Yuichi Heishi

A maraging steel is subjected to the aging to have a hardness of more than 500 Hv. A nitrided case is formed to have a depth that is about 20% to 50% to a &frac12; thickness of the maraging steel plate. An endless ring for a metal belt is constructed by the above maraging steel. According to methods of manufacturing the maraging steel and the endless ring, the nitrided case having the depth that is 20% to 50% of a distance from a plate surface to a center can be formed by executing an aging to have the hardness of more than 500 Hv, then executing a nitriding in the nitrogen atmosphere to which organic chloride is added.

Nitrided maraging steel and method of manufacture thereof

There is disclosed a resolution conversion apparatus for converting an original digital image into a digital image having a different number of pixels in accordance with an instructed conversion magnification factor. In the apparatus, a determination circuit determines the number of pixels to be interpolated in each block of the original image and positions where they are interpolated in accordance with the conversion magnification factor. The block includes a predetermined number of pixels of the original image. A converted image generation circuit generates pixel data for the interpolation pixels at the positions where they are interpolated in accordance with a predetermined interpolation equation whose coefficients are determined with the positions and data values of the pixels in the block, and combines the pixel data for the digital original image and the generated pixel data to output a converted digital image. The interpolation equation includes spline functions and Bezier functions.

Resolution conversion system and method

Disclosed is a motor-operated flow control valve for internal combustion engines which has a longer useful life and does not cause a drop of torque generated by a motor at the start-up. A rotor shaft ( ) is reciprocated with rotating motion of a motor ( ), whereupon a valve head ( ) is moved to open and close an orifice for control of a flow rate. Specific frequency of a rotor unit ( ) of the motor ( ) is set to be higher than the secondary vibration frequency of rotation of a 4-cycle internal combustion engine. The rotor unit ( ) comprises an integral magnet ( ), a single ball bearing ( ) and a resin-made magnet holder ( ) for supporting these two members, the magnet, the ball bearing and the magnet holder being formed into an integral structure. The rotor unit is supported such that an outer race ( ) of the ball bearing ( ) is held at its one end against an inner peripheral wall of a housing resin ( ) and a preload is applied to the other end of the outer race ( ).

Motor-operated flow control valve and exhaust gas recirculation control valve for internal combustion engine

Disclosed is a motor-operated flow control valve for internal combustion engines which has a longer useful life and does not cause a drop of torque generated by a motor at the start-up. A rotor shaft (,) is reciprocated with rotating motion of a motor (,), whereupon a valve head (,) is moved to open and close an orifice for control of a flow rate. Specific frequency of a rotor unit (,) of the motor (,) is set to be higher than the secondary vibration frequency of rotation of a 4-cycle internal combustion engine. The rotor unit (,) comprises an integral magnet (,), a single ball bearing (,) and a resin-made magnet holder (,) for supporting these two members, the magnet, the ball bearing and the magnet holder being formed into an integral structure. The rotor unit is supported such that an outer race (,) of the ball bearing (,) is held at its one end against an inner peripheral wall of a housing resin (,) and a preload is applied to the other end of the outer race (,).

Motor-operated flow control valve and gas recirculation control valve for internal combustion engine

Disclosed is a motor-operated flow control valve for internal combustion engines which has a longer useful life and does not cause a drop of torque generated by a motor at the start-up. A rotor shaft (9) is reciprocated with rotating motion of a motor (32), whereupon a valve head (2a) is moved to open and close an orifice for control of a flow rate. Specific frequency of a rotor unit (33) of the motor (32) is set to be higher than the secondary vibration frequency of rotation of a 4-cycle internal combustion engine. The rotor unit (33) comprises an integral magnet (25), a single ball bearing (27) and a resin-made magnet holder (26) for supporting these two members, the magnet, the ball bearing and the magnet holder being formed into an integral structure. The rotor unit is supported such that an outer race (27c) of the ball bearing (27) is held at its one end against an inner peripheral wall of a housing resin (14) and a preload is applied to the other end of the outer race (27c).

Motor-operated flow control valve and exhaust gas recirculation control

Growing community of inventors

Chiba-ken, Japan

Youichi Watanabe