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Abstract
With the intention of improving ignition performance of natural gas engine, a dual-coil ignition system was devised according to energy superposition principle. Using Multisim software and experimental apparatus, the variation of secondary voltage along with discharge time interval was studied by taking simulation and experimental methods. The results show that dual-coil ignition system can enhance the secondary voltage, increase spark duration and accomplish multiple discharge under different discharge time interval compared with single-coil ignition system. So the dual-coil ignition system is conducive to reliable ignition for natural gas engine under different working conditions and it provides a way to optimize the ignition system.
Highlights
The physical characteristics of mixture in combustion chamber and flow field near the spark plug have a great impact on the formation of flame and initial flame development
According to the type of energy storage, it can be divided into two kinds of coil discharge ignition, one is inductive ignition system and the other is capacitive ignition system
Design of dual-coil ignition system: In the purpose of realizing multiple discharges to inductive ignition system, giving consideration to increase spark duration and secondary voltage, a dual-coil ignition system was developed by using two ignition coils according to energy superposition principle
Summary
The physical characteristics of mixture in combustion chamber and flow field near the spark plug have a great impact on the formation of flame and initial flame development. Combination gas is thin, combustion speed slows down and so long spark and high-energy ignition makes for increasing the flame volume and enhancing the operation stability (Yang, 2008).
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