Oblon, Fisher, Spivak, McClelland & Maier
Apparatus for detecting combustion timing
 The apparatus for detecting combustion timing includes: a microwave unit for generating a microwave of a predetermined frequency by a microwave oscillator and detecting the received microwave to convert the same into a low frequency signal; a probe comprising a microwave sensor for radiating the microwave into a combustion chamber and receiving a reflected wave and a light sensor for electrically detecting the light emitted upon combustion; and a processing unit comprising a peak detector unit for detecting peaks of the microwave signal, a luminous signal processor unit for detecting a peak value of the first peak of a luminous signal supplied by the light sensor in each cycle and also detecting the time when the luminous signal reaches an intensity having a predetermined proportion to the first peak value thereof, and an operating unit for operating a time difference between a midpoint between peaks of the microwave signal and the time when the luminous signal reaches an intensity having a predetermined proportion to the first peak value thereof. The apparatus detects combustion timing in an internal combustion engine with high accuracy. 
F F
F02P F02B
inventional additional
Yasuhiko Michiru
Suzuki Esaki