| 摘要 |
PURPOSE: An ion probe device is provided to improve performance of an engine by surely measuring characteristic of flame spreading caused by combustion of fuel in a combustion chamber of an engine. CONSTITUTION: An ion probe device comprises: a middle block(10) installed between the upper end of a cylinder block and a cylinder head while having a combustion chamber(11); a middle piston(20) placed in the middle block and connected with a piston(4) of the cylinder block; an ion probe(30) placed at the upper face of the middle piston to sense ions in the flames spread in the combustion chamber; and a signal transmission unit for transmitting the current signals sensed by the ion probe out of the middle block. Flames generated by ignition of the fuel sucked into the combustion chamber are detected by the ion probe. Corresponding signals are transmitted to a signal transmission bar of a signal transmission guider(40) via a graphite contact point of a signal detector contacting with the signal transmission bar. Thereby, spraying of the flames is detected surely.
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