Nissan Motor Company Limited

Jun Inomata

Kimio Nishimura

Eiji Shiotani

Daisuke Terada

Kiyohisa Suzuki

Akira Shimizu

Yasuhiro Numao

Kiyoshi Hasegawa

Hidenobu Matsuyama

Michito Kishi

Kiyokazu Sugiyama

Takayuki Hirao

Hiroshi Miyaoka

Ryuji Fukada

Tooru Kosemura

Junichi Uchiyama

Koichi Kanai

Akiharu Tashiro

Takashi Iiya

Kei Fujii

Takayuki Monchujo

Kiyokazu Sugiyma

A membrane catalyst layer assembly production method is provided for producing a membrane catalyst layer assembly by discharging catalyst ink having a solvent and a solid component onto an electrolyte membrane. The membrane catalyst layer assembly production method includes forming a first catalyst ink layer having a first porosity on the electrolyte membrane by controlling a porosity of a catalyst ink layer that is formed by the catalyst ink making impact with the electrolyte membrane by adjusting an amount of solvent in the catalyst ink in drop form prior to impact with the electrolyte membrane, and forming a second catalyst ink layer having a second porosity, which is different from the first porosity, on the first catalyst ink layer, by adjusting the amount of solvent in the catalyst ink in drop form prior to impact with the first catalyst ink layer.

Membrane catalyst layer assembly production method and membrane catalyst layer assembly production device

A cylindrical internal surface processing method comprises forming a cylinder bore, roughening an upper section of the bore, depositing coating onto the bore, and machining a lower section of the bore and the coating. The forming of the cylinder bore includes forming the upper and lower sections with the lower section being axially spaced from the upper section and having an axial length greater than zero. The roughening creates a roughened surface such that a radially innermost edge of the roughened surface has an internal diameter smaller than an internal diameter of the lower section. The coating is deposited to cover the upper section and at least a portion of the lower section. The machining forms a tapered portion and a cylindrical portion, a radially outermost edge of the cylindrical portion having an internal diameter larger than that of a radially outermost edge of the roughened surface.

Cylindrical internal surface processing method

A honing method and honing control device suitable for the honing having a large processing area is provided. The honing control device includes a grinder and an expansion member for disposition in a processing hole of a workpiece. The amount of an expanding movement when the grinder contacts the inner surface of a gauge hole via the expansion member is stored as a target expansion amount by inserting a honing head into the gauge hole having the same size as a target processing diameter of a master gauge. Then, a honing of an inner surface of the processing hole is performed by inserting the honing head within a processing hole of a workpiece moving the grinder towards an outer side of a diametrical direction by the expansion member installed within the honing head to rotate the honing head. The honing is completed when the amount of the expanding movement of the grinder reaches a target expansion amount established by the master gauge.

Honing method and honing control device

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Yokohama, Japan

Jun Inomata