Re: better spark ?
I recall one NACA paper where they tested research engine at various air/fuel ratios and water/fuel ratios with constant inlet pressure, temperature and spark advance. Between about 16-11 AFR, engine didn't lost any power compared with non-injected runs, even with 60% water to fuel ratio (by weight). It lost bit of power on the lean side and substantially more on the rich side of this range. FWIW I think they were using powerful magnetos so ignition energy is really essential.
Its not rocket science. Lean mixtures are hard to ignite because there is simply very small amount of combustible air/fuel mixture between spark-plug electrodes.
Rich mixture, and even more rich mixture with large amount of water, has large thermal capacity which absorbs heat between spark-plug electrodes and prohibits creation of plasma channel.
I?m not sure if Okada booster would be helpful in this situation, it exhibits multistrike discharge, I believe that its better to release all energy at once - CDI.
|