Diesel engines running gas.
Submitted: Monday, May 05, 2003 at 22:22
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relaxed (Fraser Coast-QLD)
Here's a good one for you diesel gurus. Have just come back from a weekend at Landcruiser Park Mountian at Jimna in QLD (first time there). I noticed a diesel 4by in one of the events with a LPG cyclinder under his tray. The announcer for the race made the comment about this bloke running gas with his turbo diesel saying he gets better performance and economy. I made a visit to the promoters tent site to enquire about this new concept (to me anyway). The bloke told me that running gas in a diesel engine prolongs its life by reducing carbon build up in the cyclinder bores and a cooler runing engine. He said that I could expect on my Patrol 3lt TD a saving of fuel of between 13 to 15 cents a litre. The installation cost is $3000 and would recoup that cost in around 18 months from the savings I would make on buying fuel.
Has anyone ever heard of this idea? The sales bloke reckons this concept has been around for many years, but mainly used on bigger diesel engines such as buses and prime movers.
If anyone does have this set-up, how do you find it.?.
And here I was thinking diesel engines only run on diesel (give myself a slap around the dial)
Relaxed
Reply By: Truckster (Vic) - Monday, May 05, 2003 at 23:02
Monday, May 05, 2003 at 23:02
Ive heard of it lots before, one of the blokes building a comp GQ on the PAtrol list was going to run it, but decided to go V8 Petrol instead.
The thing is Ive never heard of anyone using it around here.. Theres sites on the subject, www.google.com.au is your friend on that one.
Would I do it to a GU 3.0? Probably not, they are $17k to rebuild if something goes bush on them..
Also what do you do in the middle of nowhere, when theres no LPG around? Once its set for the mixture, its set, thats why Col went against it in the end.
AnswerID:
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Follow Up By: Old Jack - Tuesday, May 06, 2003 at 12:24
Tuesday, May 06, 2003 at 12:24
the injection of Lpg dosn't affect running on oil (diesel) it supliments it nstead. It's not like using a gas mixer on a spark ignition engine instead of injection or carburettor. No Lpg just means all oil.
have seen the lpg injection system(CO INJECTION) used on 400hp CAT engines in trucks, lowers total fuel consuption by about only 5% at best but the differance is that the LPG is 49c lt instead of 95c a lt for oil. no performance differance was noted but they are usually pretty carefull when the motor is worth about the same price as a new car
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Reply By: nissan4x4 - Tuesday, May 06, 2003 at 21:19
Tuesday, May 06, 2003 at 21:19
A local vic company that deals with research and developement bought back the rights to the technology after initially developing it for ELGAS in QLD (someone in QLD, I'll confirm that tomorrow and supply a web site for them). It was actually the gas injection system that they developed for diesels and was used on quite a few long haul prime movers done the east coast. The theory was to run a 15-20% gas to 85-80% diesel mix. Power output was near equal and sometimes greater than deisel alone and there was the issue. The greater the gas mix, the more power, the hotter the engine, the shorter the life span. The QLD connection decided to get out due to long haul operators knocking on their door requesting some sort of compensation for blown engines. It was a little hard to prove the operator was running above reconmended mix ratios.
I'll post a link tomorrow for this research/dev company web site, there 're in an office below my work.
Cheers.
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