Thanks but don't be. I bet these guys are smarter than you, their thinking
still have some flaws, they argued for 5 years with no result and we
already got it done and tested.
They well may be (smarter than I), but I see absolutely no
evidence of it. If they're correct, then (by parity of
reasoning), running on LPG should be much more /fuel/ /efficient/
than running on liquid fuel.
In company with yourself, if their engineering is as good as
their grammar and their logic, they should be avoided like the
Correct if you run propane alone. You guys make too quick assumption, you
haven't studied any chemical transitions have you? I see many people on
the internet playing too much with equations, no support evidences.
Any way remember, you're not on full horse power as autosellers want you to
85% as efficient in an engine built to run petrol and tweaked to run
If an engine is built to run LPG, higher compression, stronger ignition
system, more ignition advance, different ignition curve and a high boost
turbo, you not only get higher performance, you also get similar instead
of inferior fuel consumption levels, and retain the clean burning
characteristics of LPG.
There's something wrong with your ideas. LPG or Propane is a shorter
chain molecule than petrol and therefore will have a lower flash point
than petrol, requiring if anything lower compression and certainly not
more advanced timing than petrol. Increasing boost pressure allows
more fuel to be burnt giving more power, but at the expense of greater
fuel usage. So you still end up with only 85% efficiency compared to
Don't forget what happened when the EU tried to get diesel
engines to run on any fuel from diesel to petrol, after getting over the
injection pump wear issues, it was found that petrol was sticking to the
cylinder walls instead of a clean burn and a 25mpg diesel engine would
only give about 13mpg when used with petrol.
Chemically you describe things correctly but you said there is no gain from
mixing LPG with gasoline, that is just your theory, it isn't a reality. I
gain 8-10mpg on top of my 50mpg. Remember Gasoline and Propane are present
at the same time, you get a quick and long burning stroke. LPG burns first
then its heat burns any unburnt Gasoline making each stroke a more complete
When I shut off my LPG tank, I can see a drop in horse power and in fuel
efficiency by about 10mpg. 1-gallon of LPG is good for 14gallons of
Gasoline. Any way do google for propane tanks for trucks, I've found a
manufacturer in US selling them quite expensive around $900 a tank to be
used with the same technique. Also do a search on a patent site, someone
already file a patent for this idea.
I don't think mixing LPG for diesel engine is a good idea but I could be
The only thing I don't like about selling LPG mixture with Gasoline to
general public is, it's dangerous with the way people handling the tank.
Customers can blew themselves up easily and blame their problem on someone
Rubbish, the amount of fuel introduced into the cylinders is a
stoichiometric ratio for complete combustion, adding more hydrocarbons
(that's what LPG is) will destroy this mixture and lead to unburned fuel
pouring out of the exhaust, polluting the atmosphere and costing money
to the person that try's.
Just because you've filed a patent, it doesn't stop it being rubbish.
You'd be right, considering that diesel engines are compression ignition
engines the chances of pre-ignition with LPG in the air could seriously
damage the whole drive chain.
As cars can be bought on the open market as LPG or petrol at the flick
of a switch known as Duel Fuel cars, again you are talking rubbish, or
would that be garbage in your broken English.
Diesel works just fine *with* LPG as additive, rather than LPG instead
of diesel in a diesel engine.
It works in a similar way on tuned diesel engines that nitrous oxide
works on petrol engines. And just like the petrol equivalent, it works
much better on forced induction engines than normally aspirated.
Running LPG as an additive rather than an alternative fuel in a high
pressure boosted over fueled diesel turbo can work in a similar way to
nitrous oxide in a petrol car.
Turbo diesels reach a point where even with the boost up they can't suck
in enough air to get enough oxygen to burn cleanly hence big soot on
drag racing tractors and diesel dragsters and circuit racing trucks.
Injecting propane not only gives an additional fuel burst, it also
releases extra oxygen that can help with the excess diesel and remove
some of the subsequent black smoke.
Seriously, look into proper LPG optimisation.
LPG has a lower calorific value so requires more fuel, but has a higher
octane so can handle more advance and compression before pre-ignition.
Using sequential injection rather than a simple gas ring in the inlet
and the correct ignition and compression (or artificially raised through
forced induction) you can at least equal petrol efficiency.
It isn't rocket science, LPG is the ideal for for turbo boosting and
because of the better resistance to knock, you don't need to over-richen
the mixture to reduce the risk of knock. Petrol and diesel engines very
often run massively rich under boost to cool the engine to keep the
Just experience that manufacturers would rather throw your fuel, at
providing extra protection, than their money at providing a replacement
engine. They cover their own arses by using slight overfueling, using
the additional fuel to cool the piston tops and avoid knock. It is a
standard practice because production engines are no where near
blueprinted and vary enough that you can't fine tune for varying driver
use and the life of the vehicle.
My old Celica GT4 (all-trac) used to cover the read valance with black
soot (it was petrol) even though the emisions were well within the UK
fairly strict MOT standards, it even ran rich after the boost was upped
by 5PSI, right to the safe limit of the standard toyota fueling
I currently drive a car that's 8+ years old and has 90K+ miles on it -
hoping to keep it for 2-3 more years.
I feel that car technology could change significantly over the next several
years - not sure it's worth buying a new gas or even hybrid vehicle now.
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