Hitachi Engineering Co., Ltd.

Hitachi, Ltd.

Other

Renesas Electronics Corporation

Renesas Technology Corp.

Ngk Spark Plug Company, Limited

Hitachi Information & Control Solutions, Ltd.

Hitachi Information Control Systems, Inc.

Tomoaki Aoki

Yasuhiro Nakatsuka

Koyo Katsura

Shigeru Matsuo

Keisuke Nakashima

Masahisa Narita

Hidehito Takewa

Hiroshi Arita

Yasuwo Watanabe

Kenji Furuhashi

Masanobu Tanaka

Yoshihiro Tanaka

Toshinobu Kanai

Kei Ouchi

Hiroyuki Kameda

Katsutoshi Nakayama

Shigeo Kuboki

Norihiko Sugimoto

Yasushi Nakamura

Masahiro Ueno

Shunji Inada

Yoshiaki Saiki

Kaori Kishimoto

Eiki Kondoh

Toshihiko Tominaga

Kazuhisa Inada

Yoshihiko Kawahara

Hisaki Sanoi

There is provided a spark plug for an internal combustion engine, including: a center electrode extending in the direction of an axis of the spark plug and having a core of higher thermal expansion coefficient than that of a front end thereof, the center electrode including a flanged portion radially outwardly protruding on a rear side thereof and a cylindrical portion located closer to a front end of the spark plug than the flanged portion and being smaller in diameter than the flanged portion; an insulator having an axial hole in the direction of the axis to retain the flanged portion in the axial hole with the cylindrical portion held in a loose-fit state in the axial hole; and a metal shell accommodating the insulator, wherein the spark plug satisfies the following condition: Cb&#x3c;Cf where Cb is a difference between an inner diameter of the axial hole and an outer diameter of the cylindrical portion at an arbitrary axial position B in the direction of the axis; and Cf is a difference between the inner diameter of the axial hole and the outer diameter of the cylindrical portion at an axial position F closer to the front end of the spark plug than the axial position B in the direction of the axis.

Spark plug for internal combustion engine

A transmit packet generated by a CPUis held in a buffer(). From among packets received from Ethernet(), a packet, a destination of which is a communication device, is held in the buffer(). A packet which should be transmitted is transmitted from a transfer judging circuitto Ethernetorthrough a MAC unitor. If a transfer judging circuitjudges a packet from the Ethernetto be a packet, a destination of which is another communication device, with reference to a destination MAC address, this packet is transferred to the Ethernetthrough MAC. If a usage rate of a transferring FIFO buffer() exceeds a threshold value in the process of transmitting a packet held in a transmitting FIFO buffer() on a priority basis, the priority order of a transfer packet is made higher than that of a transmit packet so that the transfer packet is transferred to the Ethernetorin preference to the transmit packet. This prevents a transfer buffer means from overflowing.

Packet communication device, packet communication system, packet communication module, data processor, and data transfer system

Packet communication device, packet communication system, packet communication system, packet communication module, data processor, and data transfer system

In a device and system which perform processing (displaying and outputting) of image data, the amount of data transferred between a memory holding the image data and a processor processing the image data is limited, thereby a great amount of data can be processed at high speed.

Graphics drawing device and method

Image processing device and system using the same

The packaging box includes an inner box body and an outer box body each made of paper. In the inner box body a protection box portion for protecting the screw portions and the outer side electrodes of the spark plugs is formed by being bent. Screw portion insertion holes capable of passing the screw portions of the spark plugs therethrough and bent tabs being bent at the inside of the protection box portion are provided on the upper surface of the protection box portion The lower surfaces of the large diameter portions of the metallic shells of the spark plugs are supported by the upper surface of the protection box portion including the bent edges of the bent tabs

Packaging box for spark plugs

Graphics drawing device with hidden surface processing

In a device and system which perform processing, (displaying and outputting) of image data, the amount of data transferred between a memory holding the image data and a processor processing the image data is limited, thereby a great amount of data can be processed at high speed.

Image data processor for processing pixel data in block buffer

In a data communication adapter apparatus for a digital data communication connected between a signal transmission path for transmitting both receive data and transmit data, and a host processor unit for producing frame data to output the frame data therefrom, an internal host bus is newly employed in the data communication apparatus irrelevant to the employment of a CPU dedicated bus, and the transmission/reception data generated and interpreted by the host processor is transferred via the internal host bus, a bus interface, and a system data bus between a transmission memory or a reception memory and a buffer memory. Furthermore, a reception memory (host dedicated reception memory) for storing only the reception data to be interpreted by the host processor is separately provided with another reception memory (CPU dedicated reception memory) for storing only the reception data to be interpreted by a CPU, one reception data to be interpreted by the CPU is once transferred from the transmission/reception control unit to the CPU dedicated memory and thereafter read out via the CPU dedicated bus under the control of the CPU, and the other reception data to be interpreted by the host processor is one stored in the host dedicated reception memory and then read out via the internal host bus and bus interface under the control of the host processor.

Data communication adapter and data communication terminal apparatus for

Growing community of inventors

Omiya-machi, Japan

Tomoaki Aoki