| 摘要 |
PURPOSE:To simplify a system and to detect precisely the combustion starting time by detecting the combustion starting time based on a microwave signal and a light signal. CONSTITUTION:A microwave 1 is transferred to a cable Fc through a circulator 2. It is converted into a wave guide mode TE in a coaxial wave guide conversion part, converted into a coaxial mode TEM in the said part, conducted to auxiliary chamber AC, and entered in a main chamber MC. If a piston is not at a resonance position, the microwave is reflected and enters a circulator 2. Then it is separated from a transmission wave, it turns into a low frequency signal owing to a detector, and it is sent to a processing part. A photodiode outputs a spark signal following ignition. The processing part III processes the low frequency signal from the detector 3 at a peak detecting part 15, processes the light signal at a processing part 16, then outputs the time difference between the central peak of the microwve signal and one tenth the peak point of the light signal at a time difference computing part 17, and displays the injection time and angle on a display unit DD1-3. |
