Yamaha Hatsudoki Kabushiki Kaisha

Hironori Nakayama

Tsuyoshi Kamiya

Yoshiharu Yokoyama

Satoshi Yamamoto

Shigeru Akiyama

Kazuhito Kitano

Eiji Nogami

Several embodiments of electric power-assisted manually powered vehicles such as bicycles. In these embodiments, the drive unit and control are mounted as a unit so as to minimize external wiring and to facilitate heat transfer from the control unit to the atmosphere while protecting the control unit. In some embodiments, sensors for the control unit are also mounted on the outer housing and cooperate with the internal components of the outer housing so as to provide the necessary signals for control.

Electric motor assisted vehicle

Several embodiments of electric power-assisted manually powered vehicles such as bicycles. In these embodiments, the drive unit and control are mounted as a unit so as to minimize external wiring and to facilitate heat transfer from the control unit to the atmosphere while protecting the control unit. In some embodiments, sensors for the control unit are also mounted on the outer housing and cooperate with the internal components of the outer housing so as to provide the necessary signals for control. Several embodiments of improved torque sensors are disclosed that provide smoother operation.

Sensor for electric power assisted vehicle

Power unit for electric power assisted vehicle

Engine-driven equipment includes a stopped-engine detector and a mechanism for safely shutting down the engine, including battery operated auxiliary devices, after detection that the engine has stopped. The engine may be shut down simply by closing a gas cock in the fuel line, but whatever the cause of engine stoppage, auxiliary devices are permitted to run for a predetermined time after stoppage to, for example, cool the engine or maintain warm glow plugs for easier restarting. If the gas cock is used to stop the engine, the engine will continue to run until fuel remaining in the fuel line has been expended, and then safely and automatically shut-down.

Engine operating condition detector and control for associated

A compact portable power supply including an internal combustion engine that drives a generator and which engine is fueled by a pressurized source of gaseous fuel. The outer housing and control structure is configured in such a way that the source of gaseous fuel will always be oriented so that liquid fuel will not be delivered to the engine when the power supply is in use.

Compact power supply with gas engine

A number of embodiments of air cooled compact power supplies having air inlet and air outlet openings in the lower portion of the housing of the power supply. The interior of the power supply is baffled so that the air flowing through it must follow a serpentine path to prevent air entrained foreign materials from impinging upon the engine.

Compact power supply

A small portable generator powered by a gas fueled internal combustion engine. The gas fuel supply system for the engine includes a solenoid value whose duty cycle is regulated so as to permit unthrottled operation of the engine and afford engine speed control.

Growing community of inventors

Iwata, Japan

Hironori Nakayama