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Old 01-10-2014, 07:36 AM   #1
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Combination Gas - Diesel engine

I posted this in another thread, but thought it deserved one of it's own. This recently appeared on the Road & Track magazine website:

"The inevitable next step stemming from gasoline direct injection is on the horizon, and it's called DiesOtto. This is the combination of the Diesel cycle and the Otto cycle (Otto is what we use in gasoline engines). Think of it as a diesel engine that uses gasoline fuel. The combination of the two requires mind-bendingly precise engine controls. In a nutshell, the system compresses the air-charge in the cylinder until it's superheated; injects gasoline into the cylinder; the mixture ignites from the heat and drives the piston. Why? Diesel fuel is dirty and the Otto cycle is thermally inefficient. The combination eliminates the weaknesses and augments the strengths from each.

Think it's crazy? Word on the street is that GM already has prototype engines destined for their next-generation trucks on the road."
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Old 01-10-2014, 08:48 AM   #2
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That does sound interesting, especially if it sort of splits the difference on fuel consumption.
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Old 01-10-2014, 09:29 AM   #3
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Ford EcoBoost engine - Wikipedia, the free encyclopedia

Ford has direct injection on the EcoBoost engines.

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Old 01-10-2014, 09:35 AM   #4
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Many modern gasoline (Otto cycle) engines use direct injection. What's unique about this experimental concept is the use of gasoline instead of diesel fuel in a Diesel cycle (unthrottled compression ignition instead of a spark plug and a throttle valve as in the Otto cycle). As too many diesel engine owners unfortunately know, substituting gasoline for diesel fuel in an unmodified diesel engine has catastrophic results!!

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