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This is in contrast to recent literature reports which suggest that the high-voltage spark exclusively produces spectra which are complex and which demonstrate poor background characteristics.
This reveals a strong dependency of the spark position to variations of an upward directed flow pointing onto the spark plug.
The results have supported the application of the spark-voltage profile as a means of λ ratio measurement and the use of neural networks for rapid calibration of engine management systems.
Journal ArticleDOI
Stefan Pischinger, John B. Heywood 
01 Jan 1991
62 Citations
The model also shows that excessive heat loss to the spark plug can lead to misfire.
Direct visualization of the spark discharge provided useful information about the influence of spark discharge characteristics related to the spark timing.
Results indicate lower turbulence intensity values closer to the spark plug than into the engine.
The results show the implementation of automation to press the spark plug wires in a ...
In particular, the investigation of the recirculation eddy may be helpful in determining possible positions for the spark plug, since the spark plug is preferably placed in regions where the air–fuel mixture variations are minimal.
The designed swirl chamber clearly captures the characteristic behavior of the spark channels and flames in the vicinity of the spark plug.
This demonstrated that the measurement accuracy of local fuel concentrations through a spark plug sensor can be improved significantly when the pressure dependency of atomic emissions is taken into account.
It also reveals the influence of variation loop structure of pulse power on maintaining voltage of spark discharge.
The results indicated that the data fusion method improved significantly the performance of the intelligent approach in spark plug fault detection.
It is also shown to favorably compare with data taken with a fiber optic equipped spark plug.
Moreover, the results indicated that the proposed approach can reliably be used for spark plug fault diagnosis.
Moreover, the results demonstrated that the proposed procedure had great potential in spark plug fault recognition.

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