I noticed there's been no new topics for a week so I figured I'd start a discussion on the effects of viscocity of fuel, on a diesel engine.
A kind of "use the forum or lose the forum" approach. No doubt it costs money to have.
For the last 15years, my vehicles have both had Bosch VE IP's. "Experiments" began nearly 10years ago.
What I notice with more viscous fuel is higher internal lift pressure and consequently more timing advance.
This can make the engine sound more "diesely" than otherwise.
It's a shame that Bosch uses lift pressure to control timing as it's not the ideal for higher viscocity fuels.
I'd thought how cool it would be to fit a manually adjustable pressure regulator. Adjustable from the cabin of course.
In this way, compensation for viscocity and these three: fuel, engine & ambient temperatures could be achieved.
The regulator setting is so super sensitive that I doubt the success of the idea.
It occurred to me that a mechanical method of timing advance like centrifugal weights system would be more adaptable to fuel variables.
Grafting such a set up on an existing engine would be difficult.
Diesel viscocity according to Google is somewhere in the region of 2 - 5.
Getting blended veg to this level has pros and cons.
One advantage is the oil would be able to flow around the IP, through strainers, filter, galleries etc will relative ease.
A disadvantage is the amount of blend needed to achieve the desired target.
So, one view is to adapt the fuel at/near the viscocity of diesel.
The other approach is to modify the IP, filters, etc to be happy with increased viscocity fuel.
...or some combination.
That's enough for now... Any ideas out there? (especially ideas for adapting IP for more viscous)
A kind of "use the forum or lose the forum" approach. No doubt it costs money to have.
For the last 15years, my vehicles have both had Bosch VE IP's. "Experiments" began nearly 10years ago.
What I notice with more viscous fuel is higher internal lift pressure and consequently more timing advance.
This can make the engine sound more "diesely" than otherwise.
It's a shame that Bosch uses lift pressure to control timing as it's not the ideal for higher viscocity fuels.
I'd thought how cool it would be to fit a manually adjustable pressure regulator. Adjustable from the cabin of course.
In this way, compensation for viscocity and these three: fuel, engine & ambient temperatures could be achieved.
The regulator setting is so super sensitive that I doubt the success of the idea.
It occurred to me that a mechanical method of timing advance like centrifugal weights system would be more adaptable to fuel variables.
Grafting such a set up on an existing engine would be difficult.
Diesel viscocity according to Google is somewhere in the region of 2 - 5.
Getting blended veg to this level has pros and cons.
One advantage is the oil would be able to flow around the IP, through strainers, filter, galleries etc will relative ease.
A disadvantage is the amount of blend needed to achieve the desired target.
So, one view is to adapt the fuel at/near the viscocity of diesel.
The other approach is to modify the IP, filters, etc to be happy with increased viscocity fuel.
...or some combination.
That's enough for now... Any ideas out there? (especially ideas for adapting IP for more viscous)
Comment