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diesel on propane

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Posted by kriegsman on July 1, 2003, 6:38 pm
Did anyone of you ever try to run a diesel (generator) on propane?
Ofcourse you still need about 5% diesel for the ignition, but the rest could
be propane (with the efficiency of a diesel.
Anyone any experience?

(In our country propane is much cheaper than diesel)

Posted by Scott O'Hearen on July 2, 2003, 2:54 am
You're saying two things.  Yes, diesel engines are converted to run on
propane.  However, you seem to also be asking if they can be converted to
run a mix of diesel and propane - well, that's different - and, no I haven't
heard of that.

Diesel engines are converted to run on propane in the high KW ranges where
industrial gas engines are no longer available.  They are converted in low
quantities and are expensive.

Posted by Diana Moon Glampers on July 9, 2003, 10:25 pm

That's very intriguing.  Propane carburation (not really an accurate
term with propane) is and combustion is so similar to gasoline and so
different from diesel, I'm really curious how this could be done.
Any pointers?


Posted by daestrom on July 9, 2003, 11:11 pm

Yeah, I was kind of curious about this too.  Many large diesels use an
injector system that is driven from the cam shaft.  The injector is
basically a plunger-style pump able to quickly develop the extreme pressure
needed to inject into the cylinder near TDC.  This is like 1800 psi or so.
How to compress the right amount of propane and quickly 'pop' it into the
cylinder at the right instant??  Curious how this could be done???


Posted by Eric Tonks on July 10, 2003, 12:51 am
 I remember a number of years ago the gas utility that I worked for was
really anxious to demonstrate natural gas cars and trucks and mandated that
all their vehicles were to be converted. They purchased gasoline engines for
most new vehicles since conversion was relatively easy. However, they had a
lot of construction equipment and heavy trucks that were diesel. They did do
a conversion to natural gas, but I understand that it was only a partial
conversion. They still ran on diesel fuel but were supplemented with natural
gas to reduce fuel oil consumption and still maintain the lubrication that
diesel fuel provided to the cylinder walls. My failing memory recalls it
reduced the fuel by 15%, this way they could claim that they ran on natural


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