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Termyn8or -> RE: Man Travels From Florida to Kentucky on Used Cooking Oil. (9/6/2006 9:17:01 PM)
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Remember this much about these systems though, don't go barhopping.
These engines will run on cooking oil but they won't start on it. So you NEED to remember to switch it back to deisel fuel before shutting down.
I heard about this about four years ago, where yall been ?
Actually you could make a mixture of used motor oil and ethanol distilled from your grass clippings. There are many other types of fuel. We just can't see it. Too many trees.
Running deisels has to be a decision made in quiet. It has to be considered carefully. In a big truck you don't hsve much choice, nor in a locomotive. Certain applications are for deisels, no doubt. But a car to run around in is not one of those applications IMO. IMO.
The modern gasoline burning internal combustion engine is so clean now, I had one car I swear was an air cleaner. It read 0 on everything except CO2. You can't read 0 on CO2 unless you shut the car off.
Tellya what, if someone could come up with an engine that could swich between deisel and normal mode, they could be rich. Inside city limits you switch to normal gas, when you get out on the open road, flip it, go ahead. On a normal car you'll need to bypass the catalytic, illegal, but doable. You can get a variance for research purposes.
First of all, the theoretical compression ratio of a deisel must be had. While that compression must be held for deisel operation, it needs to be abated for normal gas/benzine/petrol operation. Now those of you familiar with camshaft technology in high perfomance engines might already know this, but this problem can be managed simply by having three valves per cylinder and manipulating the timing.
For deisel operation you have a linkange which pulls the rockers out of position somehow, this is on the normal lobe, which is open longer, lowering the effective compression ratio. When closed the theoretical ratio is much more nearly achieved, like :22:1 to 25:1.
Not a bad idea, but can someone implement it ?
In gas operation the "gas" valve stays open longer. This reduces the effective compression to a reasonable level, even though the theoretical compression is high. This should also aid in scavenging a bit, so in gas operation, higher RPMs are desired. In fact it may be the only way to do it.
Pay the two cents to Swiss account number 454434543344345444456335473334.
T
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