Kobe Steel, Ltd.

Fujitsu Ten Limited

Sugita Wire, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Yousuke Matsumoto

Masamichi Chiba

Akira Miki

Ichiro Sugita

Takaaki Fukushima

Masaru Tanimoto

A steel wire for high-strength bolts is used for a non heat-treatment bolt with an excellent cold forgeability for which quenching and tempering steps have been omitted after bolt formation, and which has a tensile strength of 1200 MPa or more and an excellent delayed fracture resistance. The steel wire includes C, Si, Mn, P, S, Cr, Al, N, and B, at least one selected from the group consisting of Ti, V, and Nb with the balance consisting of iron and inevitable impurities. The steel wire has a microstructure wherein ferrite and perlite have a total area rate of 98% or more, perlite lamellar spacing is 250 nm or less, and an area rate of the perlite is more than 40%, and 80% or less. The steel wire has a tensile strength of 1300 MPa or less.

Steel wire for bolt, bolt, and manufacturing processes therefor

An electronic control unit includes an input interface having multiplexer circuits, each of which circuits is supplied with input signals supplied from an outside of the electronic control unit, and a failsafe processing part that determines whether an abnormality occurs in the input interface by referring to a state of a specific multiplexer circuit that is at least one of the multiple multiplexer circuits when determining that an output signal of the input interface has an abnormal state and executes a failsafe process based on results of determination as to whether an abnormality occurs in the specific multiplexer circuit.

Electronic control unit

Growing community of inventors

Kobe, Japan

Yousuke Matsumoto