Calsonic Corporation

Nissan Motor Company Limited

Takenosuke Sano

Hajime Sato

Keiichi Koike

Koji Iwahashi

Yutaka Enokido

Masahiro Honma

Fumio Hagi

Toshihiro Kimura

Yukihiro Niide

An electric motor assembly for driving an air blower is disclosed. The assembly comprises a casing of metal, the casing having opposed open ends closed by respective covers of metal; a rotation shaft rotatably disposed in the casing, the rotation shaft having one end exposed to the outside through an opening formed in one of the covers, the one end being adapted to connect to a fan of the air blower; a plurality of magnets installed in the casing and circumferentially surrounding the rotation axis; an armature mounted to the rotation shaft to rotate therewith; a commutator mounted to the rotation shaft and electrically connected with the armature; brushes operatively contacting with the commutator and supported by the casing; and an electric power feeding device for feeding the brushes with an electric power. A pulse width modulating device is further employed which is electrically connected with the power feeding device for modulating the electric power by means of a pulse width modulation method. The pulse width modulating device is installed in the casing for radio noise suppression.

Low-noise electric motor assembly for automotive blower

An alcohol concentration detecting device is disclosed, which comprises an alcohol sensor of capacitance type having a probe portion which is to be submerged in an alcohol-mixed fuel, the alcohol sensor issuing an output signal which varies in accordance with the concentration of alcohol in the alcohol-mixed fuel; a first oscillating circuit which receives the output signal of the alcohol sensor and issues a variable pulse signal whose duty ratio is variable in accordance with the output signal; a second oscillating circuit which issues a reference pulse signal, the reference pulse signal being the same as the pulse signal which is provided by the first oscillating circuit when there is no alcohol in the fuel; and an alcohol concentration detecting circuit which receives and compares the variable pulse signal and the reference pulse signal and issues an alcohol concentration representing signal which is variable in accordance with a difference in duty ratio between the variable pulse signal and the reference pulse signal.

Alcohol concentration detecting device

Growing community of inventors

Tokyo, Japan

Takenosuke Sano