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Featured researches published by Toru Kita.


Journal of the Acoustical Society of America | 1984

Vibration sensor for an automotive vehicle

Takeshi Fujishiro; Kiyoshi Takeuchi; Toru Kita

A vibration sensor for an automotive vehicle having a multi-peak vibration characteristic of wider responsiveness and of a higher S/N ratio. The vibration sensor comprises a plurality of piezoelectric vibrators so arranged that the piezoelectric voltage signals from the vibrators are synthesized in reverse polarity between two elements having two adjacent resonant frequencies, when the element are deformed in the same direction. Therefore, the voltages are synthesized in the same polarity, when engine knocking frequency lies between two adjacent sensor resonant frequencies, because a vibrator is 180 degrees out of phase with another adjacent vibrator.


Archive | 1982

Oil deterioration detector method and apparatus

Seishi Yasuhara; Hiroshi Kobayashi; Toru Kita; Hideyuki Saito


Archive | 1979

Fluid measuring device

Hiroshi Kobayashi; Toru Kita; Takeshi Fujishiro


Archive | 1981

Fuel gauge for an automotive vehicle

Hiroshi Kobayashi; Toru Kita


Archive | 1978

Device for measuring rotational angle of rotary member

Takeshi Fujishiro; Toru Kita; Akio Hosaka


Archive | 1976

Sensor for detecting variation in oxygen concentration in gas

Toru Kita; Takeshi Fujishiro


Archive | 1977

Oxygen sensor particularly useful in exhaust system of automotive engine

Toru Kita; Takeshi Fujishiro


Archive | 1977

Oxygen sensor having protective hood and method of using same

Toru Kita; Takeshi Fujishiro


Archive | 1978

Method for detection of fluctuation in air/fuel ratio of air-fuel mixture fed to internal combustion engine

Takeshi Fujishiro; Toru Kita


Archive | 1976

Oxygen sensor particularly for use in exhaust system of automotive engine

Toru Kita; Takeshi Fujishiro

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