W
Wheresthedog
hi all
I'm working on a veg oil conversion for our (1997) 110 defender and have some ideas of how I'd like to control it but my auto electric knowledge is poor and I was wondering if anyone could help? I've contacted a few auto electricians and no one wants the job.
I have bought a stack pro water temp gauge which can be programmed to act as a switch once a certain temp is reached:
52mm Auxiliary Gauges: Pro-Control - http://www.stackltd.com/instruments_pro_control.html
And an on (veg) / off (diesel) / on (purge) 'master' carling switch:
The plan is to start on diesel and once the water (engine) temp gauge reaches 70c the engine switches to veg oil.
A minute or so before the journey's end we will switch to 'purge' and diesel will be drawn from the diesel tank but the unused fuel will be returned to veg tank to clear the lines of veg oil ready for the next start up.
He's a schematic of the system:
There are 3 x 3 way solenoid valves and a 12v diesel pump (veg oil is pumped via a mechanical pump and will always be in operation).
On / Veg mode: 1, 2 and 3 and diesel pump is powered = veg oil drawn from and returned to veg tank in its own loop and diesel is drawn from diesel tank and used to run vehicle. Once stack pro water temp gauge reaches 70c: 1, 2 and 3 and diesel pump become unpowered = veg oil drawn from and returned to veg oil tank (engine now running on veg oil).
Off / Diesel mode: 1, 2 and 3 and diesel pump are powered = diesel drawn from and returned to diesel tank.
Purge mode: 1 and 2 are powered, 3 is unpowered = diesel is drawn from diesel tank and returned to veg tank.
Although diesel mode is activated in the carling switch off position the solenoid will be powered as the vehicle will be in veg mode most of the time and will use less battery power this way.
I'm not sure what I need to make this system work (relays? Diodes? Etc) or indeed if there are any problems/impossibilities with what I've proposed?
Any help and advice would be much appreciated. (12 volt planet said they can help with all the parts but can't help with the design).
Cheers
I'm working on a veg oil conversion for our (1997) 110 defender and have some ideas of how I'd like to control it but my auto electric knowledge is poor and I was wondering if anyone could help? I've contacted a few auto electricians and no one wants the job.
I have bought a stack pro water temp gauge which can be programmed to act as a switch once a certain temp is reached:
52mm Auxiliary Gauges: Pro-Control - http://www.stackltd.com/instruments_pro_control.html
And an on (veg) / off (diesel) / on (purge) 'master' carling switch:
The plan is to start on diesel and once the water (engine) temp gauge reaches 70c the engine switches to veg oil.
A minute or so before the journey's end we will switch to 'purge' and diesel will be drawn from the diesel tank but the unused fuel will be returned to veg tank to clear the lines of veg oil ready for the next start up.
He's a schematic of the system:
There are 3 x 3 way solenoid valves and a 12v diesel pump (veg oil is pumped via a mechanical pump and will always be in operation).
On / Veg mode: 1, 2 and 3 and diesel pump is powered = veg oil drawn from and returned to veg tank in its own loop and diesel is drawn from diesel tank and used to run vehicle. Once stack pro water temp gauge reaches 70c: 1, 2 and 3 and diesel pump become unpowered = veg oil drawn from and returned to veg oil tank (engine now running on veg oil).
Off / Diesel mode: 1, 2 and 3 and diesel pump are powered = diesel drawn from and returned to diesel tank.
Purge mode: 1 and 2 are powered, 3 is unpowered = diesel is drawn from diesel tank and returned to veg tank.
Although diesel mode is activated in the carling switch off position the solenoid will be powered as the vehicle will be in veg mode most of the time and will use less battery power this way.
I'm not sure what I need to make this system work (relays? Diodes? Etc) or indeed if there are any problems/impossibilities with what I've proposed?
Any help and advice would be much appreciated. (12 volt planet said they can help with all the parts but can't help with the design).
Cheers