LPG injection on a diesel engine. (for tashasdaddy)

[achris]

Firstly, if I give you this information, will I get 'moderators brownie points'?

The main difference between LPG on a petrol engine and a diesel engine is in the fact that the diesel engine fuel system isn't modified in any way. The LPG is injected into the air intake of the engine and is present in the compressed air charge in the cylinder at the time of diesel injection. This means that the LPG is ignited as the diesel starts to burn, that promotes diesel burn, increasing it from about 80% to 98%. That improves power and torque and decreases consumption (because more of the available energy in the diesel is being released). It also means the engine oil stays clean for longer as less carbon particulates are created and much less black exhaust smoke, for the same reason.

I do have a web link on the website, but if you missed it, http://www.dieselgasaustralia.com.au/'

Cheers,

Chris..............

 

[Bob_VT]

Re: LPG injection on a diesel engine. (for tashasdaddy)

I had played around with it when I had a TDI diesel Jetta.... chipped, larger injectors and the dam thing would fly! Went from 90 hp to 135 hp with the modifications and still got great MPG. "www.dieselperformanceproducts.com"

Impressive Toyota you have there. I have a 4runner (Surf) and the USA does NOT import the 3.0 diesel that is available elsewhere in the world or I would be hunting for one.

 

[QC]

Re: LPG injection on a diesel engine. (for tashasdaddy)

This is what I sell for a living . . . However . . . Natural gas is the only way to do it well. LPG can be used, but it is lower octane than natural gas . . . "Octane? What the flyin' flip is QC talking about? Diesels don't care about octane!!!!" True, but when you inject a gaseous fuel into the intake air you now have a homogeneous charge of air and fuel and then you care about octane very much!!!! cleanairpower.com We build 500 bhp Dual-Fuel (natural gas and diesel) engines that we sell in Australia and down to 190 bhp 7 liters too.

LPG systems can work in small qty's. The main reason they are more efficient (not very) is that they lower charge air temp. It is not because you have introduced a new fuel. When you count both fuels, and use the same intake air temp, economy stays the same or can actually decrease some . . . The biggest concern with all dual fuel systems is detonation at high loads and high charge air temps. Boom!!!! Trust me we've bought a lot of engines and the LPG ones are worse . . . BTW, our systems use 90% gas and 10% diesel at full load. Most LPG systems are the reverse . . .

P.S. I tried quotes around the web address and it still auto inserts a direct link . . .

edit: deleted "url" and www., etc from the addy to make it a referral.

 

[wildmaninal]

Re: LPG injection on a diesel engine. (for tashasdaddy)

My father makes bio diesel for his John Deere tractor. He's still learning the ropes but he has ran a few tanks in the tractor now. He is toying with the idea of getting a diesel pick up truck. The only bad part about bio is that the fuel can gel up in the winter time from what I hear.

 

[Ezrider_92356]

Re: LPG injection on a diesel engine. (for tashasdaddy)

regular desil fuel will gel up in the winter time just bio desil does it at a warmer temperature we have several desil work trucks and in north dakota where we commonly see below 0 degree weather anti gel fuel treaments are added with every tank full

 

[dolluper]

Re: LPG injection on a diesel engine. (for tashasdaddy)

Humm I ran propane for awhile it was 140 octane {why it burns so clean} so what's natural gas I always taught it was lower than propane

 

[DJ]

Re: LPG injection on a diesel engine. (for tashasdaddy)

QC is the expert. LPG, CNG-whatever, is a gaseous fuel. Diesels don't necessarily like it. It can be used with proper set up.

Retrofit is best left to experts, like QC.

 

[mscher]

Re: LPG injection on a diesel engine. (for tashasdaddy)

My father makes bio diesel for his John Deere tractor. He's still learning the ropes but he has ran a few tanks in the tractor now. He is toying with the idea of getting a diesel pick up truck. The only bad part about bio is that the fuel can gel up in the winter time from what I hear.

Some fuel wholesalers (at least in Ohio) are cutting #2 diesel/red fuel oil, with 30% #1 diesel (kersosene), for winter use.

You might try something like that, or use an anti-gel (wich is probably K1 anyway), as easyrider has stated.

Just curious, what setup does your pop use to make his own fuel?

 

[QC]

Re: LPG injection on a diesel engine. (for tashasdaddy)

Missed this dolluper . . .

Propane's octane is actually 104, Methane (Natural Gas) can be as high as 130 . . . Cleanliness has nothing to do with Octane. It has most to do with the Chemical comparison of Hydrocarbons. Typically, the longer the equation, the dirtier the fuel. Methane's is CH4, LPG (Propane) is C3H8, gasoline is C8H18 and diesel is C12H23, Hydrogen, well, uh it has no Carbon so it is simply H (H2 to be technically correct). This may sound like a sales pitch for Hydrogen, but I don't believe it for a minute. Not in our lifetimes anyway, at least not in any significant qty's.

Hydrogen, the fuel of the future and it always will be . . .

BTW, all of the hype about Hydrogen always assumes that the energy necessary to make it comes from some free source . . . like wind or solar or whatever. Comparisons do not note that the makers of that "free" energy could simply sell it to somebody who would actually pay for it, which is exactly what they would do. Also, even funnier to me, is that initial plans are to make it from Natural Gas . . . seems like an extra step to me

 

[dolluper]

Re: LPG injection on a diesel engine. (for tashasdaddy)

Humm C5 propane was 118 octane C7 was in auto converts pumps {Canada} ,I was told it was 140 octane ,guess you have less in the states ,less butane % I guess I'm no expert but it sounds like you guy's only get barbeque propane

 

[QC]

Re: LPG injection on a diesel engine. (for tashasdaddy)

Different Octane scale? I think those numbers are for 100%, but Ill double check. I think butane makes it go down BTW. We fight with butane, ethane and propane in Natural gas and all of them make Octane drop.