Toyota Jidosha Kabushiki Kaisha

Masaru Setodoi

Natsuki Sugiyama

Kenji Kidera

Mitsutaka Yoshida

Masahiko Asano

Akio Sato

Yasuo Kinoshita

Hirokazu Ito

Masao Nakayama

Hiroyuki Sakai

Akio Satou

Taku Yamaguchi

A laser drilling method is a laser drilling method for performing drilling on a workpiece by use of a laser beam. The laser drilling method includes, after machining a through hole by radiating the laser beam to the workpiece (S), scanning with the laser beam centered around the through hole toward a radial direction while changing a radiation output of the laser beam (S).

Laser drilling method and apparatus with radiation output changes in a radial direction during drilling of a workpiece

In a fuel injection valve having a nozzle hole plate wherein a nozzle hole is formed, the nozzle hole is formed with a flow path cross-section having an oval shape that has long axes and short axes, and the nozzle hole is formed having a tapered shape in which a flow path sectional area becomes larger from an entry-side open end portion toward an exit-side open end portion. The nozzle hole is formed such that a second angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in an oblique section along the short axes of the entry-side open end portion and the exit-side open end portion, is greater than a first angle that is an intersecting angle of opposing nozzle hole inner wall surface portions in a longitudinal section along the long axes of the entry-side open end portion and the exit-side open end portion.

Fuel injection valve

Growing community of inventors

Miyoshi, Japan

Masaru Setodoi