dpantazis
#12
ok, all this talk about keeping fuels seperate has me a bit stymied, or maybe yabbied is more like it.
the issue with switching from one fuel system to the other has to do with contaminating the diesel side with WVO.
assumptions-
ok, so i am thinking that there is a SIMPLE solution, and maybe someone has already figured it out and i have not found it yet.
why not use a timed relay to control a SIMPLE 12V 3-way valve- be it a 3 port fuel valve or other? its not under pressure, so it can be almost anything.
i guess i am thinking that a SIMPLE Delay on Make type relay like this one:
http://www.artisancontrols.com/products/2410sa.htm
its a DPDT relay. as i read the schematic, one side is live all the time. the time it takes to purge the fuel from the engine to the tank is the same for WVO or dino.
connected to a 3 way directional control valve- 3 port fuel selector valve would suffice. or half of a 6 port.
so on wvo warmup, flip a switch to power up dedicated WVO pump. relay picks up signal, timer to purge activates, counts down and switches 3 port output after X minutes from dino to WVO.
then, when switching off of WVO, relay pics up the signal, starts coundown again, to switch 3 port back to dino
what am i missing?
dennis
the issue with switching from one fuel system to the other has to do with contaminating the diesel side with WVO.
assumptions-
- the fuel line pressure downstream from the FPR is under little to no pressure
- we need some means of controlling the path of the return flow of fuel, dino or WVO
- we need to delay the operation of the switching of the return lines of fuel
ok, so i am thinking that there is a SIMPLE solution, and maybe someone has already figured it out and i have not found it yet.
why not use a timed relay to control a SIMPLE 12V 3-way valve- be it a 3 port fuel valve or other? its not under pressure, so it can be almost anything.
i guess i am thinking that a SIMPLE Delay on Make type relay like this one:
http://www.artisancontrols.com/products/2410sa.htm
its a DPDT relay. as i read the schematic, one side is live all the time. the time it takes to purge the fuel from the engine to the tank is the same for WVO or dino.
connected to a 3 way directional control valve- 3 port fuel selector valve would suffice. or half of a 6 port.
so on wvo warmup, flip a switch to power up dedicated WVO pump. relay picks up signal, timer to purge activates, counts down and switches 3 port output after X minutes from dino to WVO.
then, when switching off of WVO, relay pics up the signal, starts coundown again, to switch 3 port back to dino
what am i missing?
dennis
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