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LPG injection into diesel engine
- Thread starter arunmrao
- Start date
arunmrao - seen this page:
Not manufacturers but converters.
I imagine that some of the vehicles mentioned on their site will be quite familiar in India.
Bill
Not manufacturers but converters.
I imagine that some of the vehicles mentioned on their site will be quite familiar in India.
Bill
- Thread starter
- #4
To the best of my knowledge, there are no OEM producers of diesel engines who approve of the use of LPG AND diesel together.
There are a great number of aftermarket suppliers of dual-fuel devices, some work fairly well, but a great number of them do not. I have seen the remenants of more than one engine that suffered from overfueling with lpg and diesel. One of them is a paperweight in my office, at least, what used to be a piston.
Franz
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There are a great number of aftermarket suppliers of dual-fuel devices, some work fairly well, but a great number of them do not. I have seen the remenants of more than one engine that suffered from overfueling with lpg and diesel. One of them is a paperweight in my office, at least, what used to be a piston.
Franz
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Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
- Thread starter
- #6
The Cummins piston is from a 2001 5.9B 235 bhp in a 1 ton Dodge truck, with about 5,000 miles since new! The owner was convinced to install a propane "injection" system which lasted less than one month. The installer stated that the system was "user tunable for either economy or power", guess which one the driver selected, all the time!
This was a DI diesel engine with a home-brewed propane fumigation system.
A lawsuit ensued over who was responsible for the damage. The court found in favor of the vehicle owner (who was just looking to get his engine replaced, about $15,000 USD) but the court took exception to the installers attitude and sales process and added on additional punitive awards of close to $50,000. The settlement was for close to $80,000 which included the cost of a rental truck while this process was underway, about 6 months, attorneys fees, and a severe slap on the wrist.
I was called in as expert witness but never had to testify.
Franz
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
This was a DI diesel engine with a home-brewed propane fumigation system.
A lawsuit ensued over who was responsible for the damage. The court found in favor of the vehicle owner (who was just looking to get his engine replaced, about $15,000 USD) but the court took exception to the installers attitude and sales process and added on additional punitive awards of close to $50,000. The settlement was for close to $80,000 which included the cost of a rental truck while this process was underway, about 6 months, attorneys fees, and a severe slap on the wrist.
I was called in as expert witness but never had to testify.
Franz
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
marcdeluca
Electrical
The only one I know of from a manufacturer is the Cummins Westport system. I have been running one of my own design on my Duramax for 2 1/2 years now with great success. I use it mainly as an alternative fuel. Most of the time I burn around 3 gal of lp to 1 gal of #2. I can't run that high of ratio when towing, it's more like 2:1 or so. My setup starts lightly pinging as the load increases if you have it set too high, so there is no sudden detonation that can take place.
Marc
Marc
Lou Scannon
Automotive
Cummins Westport does not make a dual fuel diesel/LPG engine. They do make a dedicated, spark-ignited LPG B5.9 engine. It is mainly sold into street sweeper and phoney cable car bus applications.
Regarding fuel substitution, I figure you start saving money when the cost of LPG per gallon is less than 70% of the cost of diesel, assuming thermal efficiency stays the same.
Regarding fuel substitution, I figure you start saving money when the cost of LPG per gallon is less than 70% of the cost of diesel, assuming thermal efficiency stays the same.
marcdeluca
Electrical
Hemi,
You are exactly right. LP has to be 2/3 the price of #2 to break even. The savings begins when it is less than that. I get lp for $1.45, so it usually saves me around 3¢/mi or so. What is really cool is how much it increases the torque. You have to be careful when towing because the engine doesn't act like it is working hard, but it will cause 5th gear to slip if you aren't careful. (Allison)
You are exactly right. LP has to be 2/3 the price of #2 to break even. The savings begins when it is less than that. I get lp for $1.45, so it usually saves me around 3¢/mi or so. What is really cool is how much it increases the torque. You have to be careful when towing because the engine doesn't act like it is working hard, but it will cause 5th gear to slip if you aren't careful. (Allison)
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