The authors conducted field studies of a sequential series of breakdown voltages of the ignition system of the engine ignition model F8CV of the Daewoo Matiz car idling at a minimum crankshaft speed (650 rpm). The experiments were conducted on the basis of a microprocessor system for studying the distribution of breakdown voltage values. In addition to the distribution over the ranges of breakdown voltages, the algorithm of this system allows you to record a series of breakdown voltages in the microprocessor RAM. It was revealed that a sequential series of voltage values can: increase several cycles (no more than 3 cycles); several cycles to decrease (no more than 3 cycles); stay the same. It can be assumed that there is a correlation between the breakdown voltage and the maximum cycle pressure. A further research objective is to identify the patterns of change in breakdown voltage in a sequential series of breakdown voltage values.
Keywords: ignition system, spark discharge, internal combustion engine, spark plugs, breakdown voltage, histogram
The authors carried out in-situ studies of the distribution of the breakdown voltage values of the F8CV engine of the Daewoo Matiz Diesel engine idling at a minimum engine speed (650 rpm) and with an increased crankshaft speed (2840 rpm). A histogram of the distribution of the values of the breakdown voltage in the interelectrode gap of the spark plug is obtained for these operating modes of the internal combustion engine. It was revealed that at a minimum engine speed of the ICE crankshaft, the distribution of the cyclic values of the breakdown voltages obeys the normal distribution law for a spread of 6-15 kV. At higher speeds, the distribution of the cyclic values of the breakdown voltages differs from the normal distribution law. With an increase in the speed of the crankshaft, all values of the breakdown voltage fall by 3-4 kV. This can be explained by homogenization of the mixture and an improvement in the conditions for breakdown of the spark plug interelectrode gap.
Keywords: ignition system, spark discharge, internal combustion engine, spark plugs, breakdown voltage, histogram