Thanks Max. Interesting method. Thanks again, Jeff
______________________________________________ "Once an owner has got used to charcoal gas he will never revert to the more expensive fuels", Geo Bray On May 20, 2015 9:11 AM, "gasman" <[email protected]> wrote: > > Hello, Jeff! > > There are two logical "formulations" that, when both used, gives a practical working solution for an "independent" motor starting from a common gas-line. > > A common gasifier delivery line usually (in a good system) keeps below 50 cm H2O. > > A motor with tight valves, without overlap and hidden crankcase ventilation into the manifold develops ~ 500 cm H2O at cranking. > > > Combined with the fact: > > > Identical pressure drops over identical openings (slots) results in IDENTICAL FLOWS. (with similar fluids) > > Using identical ganged twin flaps with identical geometry for gas and air will deliver a 50/50 air/gas mix, if starting both from atmospherical pressure. > > > The secondary air intake pressure has to be regulated to equal the momentary gas-line > pressure with a membrane and air-line flap, sensing the resulting air-pressure versus the gas-line pressure. > > > This way the total pressure drops in both "legs" will constantly be equal. > > > To furthermore assist slow crank starting, the twin-flaps will be closed by a trimmable spring closing the flaps COMPLETELY. > > A manifold-vacuum membrane or cylinder, diameter ~2-3" opens the twin-flaps > when the spring starts to give in for a vacuum of ~100 - 200 cm H2O. > > This opening increases as the motor fires, and has to be controlled by a manually settable stopper = idle limiter! > > When fired, there has to be a "change over" to automatic run... > > > Max Gasman
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