Yamaha Marine Kabushiki Kaisha

Yamaha Hatsudoki Kabushiki Kaisha

Takao Kawai

Noboru Kobayashi

Yukio Matsushita

Hirotaka Kaji

Yoshiharu Isaka

A parent-child type boat having an electric power generating device, such as a fuel cell. The boat includes a parent boat and at least one child boat which is smaller than the parent boat. The parent boat is equipped with a generating device. The child boat is equipped with a battery and an electric propulsion device. When the child boat is docked with the parent boat and electrically connected thereto, power can be supplied to at least one of the battery and the electric propulsion device of the child boat from the generating device of the parent boat.

Parent-child type boat with generator

An apparatus for supporting docking of a marine vessel includes a distance measuring unit which measures a distance between the marine vessel and a candidate docking site, a distance measurement controlling unit which controls the distance measuring unit to measure distances between the marine vessel and at least three measurement points defined around the candidate docking site, a configuration evaluating unit which evaluates the configuration of the candidate docking site based on the distances between the marine vessel and the at least three measurement points, and a docking suitability judging unit which judges, based on the result of the evaluation, whether or not the candidate docking site is suitable for docking of the marine vessel.

Docking supporting apparatus, and marine vessel including the apparatus

An electric propulsion unit can include a propeller for producing thrust, a motor for driving the propeller, and a fuel cell for supplying electric power to drive the motor. The fuel cell can include a fuel cell stack for generating power and a fuel tank for feeding fuel to the fuel cell stack.

Electric propulsion unit

A number of embodiments of single intake valve per cylinder engine wherein the induction passage is provided with a control valve for generating a tumble action in the intake passage when the engine is operating at speeds other than high speed high load. The arrangements are designed so as to promote a stratification in the combustion chamber under some running conditions and the intake passage is disposed at an angle to a plane containing the cylinder bore axis.

Growing community of inventors

Shizuoka-ken, Japan

Takao Kawai