Ignition, reliable

Double Salt of Cesium Dichromate and Cesium Decahydrodecaborate. USP 3256056 of June 14, 1966 of R.K. Armstrong (to DuPont Co) is described in CA 65, 8660(1966) as follows A B-contg compd is prepd which is suited for use in delay-producing compns, which ignite reliably and uniformly and has excellent resistance to impact and to static eLectricity. The compd has the formula... 

The 5.0 lb thrust G02/GH2 engine which attained 69,000 firings in a boilerplate version prior to failure demonstrated its capabilities to provide high specific impulse, repeatable impulse bits and 100% ignition reliability at a 3 to 1 blowdown ratio, t... 

From a safety standpoint, priority must be given to the measures in item 1. Group 2 cannot be used as a sole protective measure for flammable gas or solvent vapors in industrial practice with sufficient reliability, but can be applied as the sole protective measure when only combustible dusts are present if the minimum ignition energy of the dusts is high (>10 mj) and the operating areas concerned can easily be monitored. 

Finally, it must be pointed out that all devices suitable for use in explosion isolation—or, quite generally, all explosion protection devices used in practice—may be used only when their pressure rating, ignition breakthrough protection, and reliability have been proven in suitable investigations by competent bodies. 

Fitt with a reliable Altronic II CPU solid state low tension breakerless ignition system. 

Theoretically, if one corner of the fire triangle is eliminated a fire or explosion is impossible. However, in practice, if flammable gases or vapours are mixed with air in flammable concentrations, sooner or later the mixture is likely to catch fire or explode because of the difficulty of eliminating every source of ignition. For reliable control of flammable materials, including combustible dusts, the aim is to remove two corners from the fire triangle. This can include some combination of ... 

I expect that the plasma spark might be necessary just to reliably ignite the egas alone, without even considering... 

GDI systems have become the predominant ignition systems since the 90 s due to the increased reliability of their electronic components and their precise timing ability. Racing GDI systems are even able to fire the plugs 8-12 times at idle on each power stroke but usually only once above 3,000 rpm. This gives better fuel burn and more power. 

Since the 90 s most automotive manufactures have opted for advanced computer controlled CDI ignition systems, primarily because of better firing reliability and because of increased environmental legislation. 

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