Hitachi, Ltd.

Nissan Motor Company Limited

Tsutomu Kooriyama

Minoru Takahashi

Masazumi Sone

Masami Shida

Hiroatsu Tokuda

Hiromitsu Nagae

Koji Harada

Tadao Suzuki

Yukitsugu Fukumori

Masumi Takada

A platinum wire (2) is wound in the form of coil. An outer surface of the coiled wire (2) is overcoated with a glass member (4). The coiled wire (2) is welded to supporting member (3). An exothermic resistor (1; 1A, 1B) comprised the coiled wire (12), the glass member (4) and the supporting member (3), and has no bobbin therein. Such an exothermic resistor (1; 1A, 1B) free from a bobbin is used as a hot wire element (1A) and a cold wire element (1B) in a hot wire air flow meter. The quantity of heat generated on the coiled wire (2) hardly transmit through the supporting member (3) and is carried away almost through air. The transient response characteristics under sudden change of an amount of air flow can be improved.

Hot wire air flow meter

A device for electrically connecting a spark plug to a high-voltage cable supplying a high voltage to the spark plug from an ignition coil, comprising a connecting member whose maximum length in the axial direction of the spark plug is selected to be not longer than 25 mm so as to reduce the antenna effect in the area including the connecting member thereby minimizing undesirable radiation of noise which provides radio interference against other electronic units.

Device for electrically connecting spark plug to high-voltage cable

Growing community of inventors

Katsuta, Japan

Tsutomu Kooriyama