Abstract
In order to achieve a fast and complete combustion of the air – hydrocarbons mixture into the combustion chamber of internal combustion engine, a high quantity of energy should be delivered to a spark discharge. Taking into account that the first hydrocarbon molecules in the vicinity of the plasma are ignited in the first 10 $\mu$s of its lifetime, it is important to deploy the energy to the discharge in a short period of time. This means that a higher current rise rate is required, which can be achieved by using a capacitive high voltage power supply. This paper aims to presents the experimental results obtained from using a capacitive power supply for powering a new type of double spark plug, which assures a larger volume of plasma, more than double compared to a conventional spark plug. All the results are presented as a comparison with the results obtained when using a conventional inductive supply, both for the double and for a conventional spark plug. Compared to a conventional inductive system, the proposed power supply assures, for comparable values of discharge energy, higher current rise rate (up to 400 A/ms instead of less than 70 A/ms) and lower lifetime (around 0.2 ms instead of up to 0.75 ms in the case of the double spark plug).
Published Version
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