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Originally Posted by beef_bourito
I was just wondeing if you could use a wate or alcohol injection system with a diesel engine, and if there would be any gains. With water injection i don't really see any problems, it might cool the combustion chamber a bit but it would raise the compression, it would also cool the intake allowing for more air to be put into the cylender and therefore you can use more fuel.
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Water wouldn't help. Raising compression won't do much for a diesel (and if its a turbo might actually hinder things). Also, since diesels don't have a throttle and are exposed to ambient air, the water would most likely just occupy space that could contain oxygen. It would however lower EGTs which is almost always a good thing.
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with alcohol injection think the same hold true but the problem that i see with that is that the alcohol could ignite on the compression stroke and creat knock, although is this at all significant? i mean you don't inject much alcohol. basicaly i want to know advantages/disadvantages to water/alcohol injection and whether or not it's doable.
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The alcohol might pre-ignite which would reduce power. I've never read anything about alcohol in diesels so I'm not sure. Anyone know its activation energy?