Quote:
Originally Posted by silverfox  Does the igniting temperature of biodiesel in the cylinder vary from that of fossil diesel.
I ask that because, back in the old days (40 years plus) when black diesel was used in plant machinery operates say that they had more hours (or kms) from the same tank size. That meant more bang for your buck.
Would the burning temperature of the fuel in the cylinder be the feature I am looking for? |
There are a number of temperatures to be considered.
Bang for your buck involves the heat value of the fuel, nothing to do with burning temperature.
Igniting temperature is the flashpoint and as long as that temp is exceeded in the combustion chamber the fuel will ignite on injection. The flashpoint of bio is higher than mineral diesel but still plenty low enough for good ignition.
The burning temp (peak combustion temp) is probably very slightly higher for bio as I have heard that if produces more NOx.
I think I have seen, elsewhere on this forum, a comparison of heat values but for bio it will depend on what it is made from. I understand animal fat gives more 'bang for your buck' than vegetable oil.
Most info is here somewhere if you know what you are looking for.