What do you think?

Eye-Q

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1) You might want to rethink your thread titles, "What do you think?" isn't a particularly meaningful title. What if everyone would write thread titles like that, you couldn't find any thread which interest you anymore.

2) To answer the question: No, because of the inherent differences between diesel and petrol engines. Diesel engines need a high compression ratio to heat the diesel-air-mixture so it ignites itself while petrol engines can't have such a high compression ratio because then the petrol-air-mixture would ignite prematurely and the engine would run either badly or not at all.
 

LeVeL

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What do you guys thinks? Is it possible to make motor engines which can run on both petrol and diesel at the same time?
I suggest doing five minutes of reading on the basic concepts of gasoline and diesel engines. You'll quickly find the answer to your question to be "no", as Eye-Q said.
 

CrzRsn

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Actually the answer is yes. There are multifuel engines that can run on a variety of fuels, most commonly used by the military.

The M35A2 is commonly powered by an LDT 465 engine, made by either Continental Motors Company, Hercules, or White Motor Company. It is an in-line, 478-cubic-inch (7.8 L), six-cylinder, turbocharged multifuel engine developing 134 bhp (100 kW) and 330 pound force-feet (447 N?m) of torque. This is coupled with a 5-speed manual transmission and divorced 2-speed transfer case (either a sprag-operated transfer case Rockwell 136-21 or air-operated selectable transfer case Rockwell 136-27). Multifuel engines are designed to operate reliably on a wide variety of fuels, including diesel fuel, jet fuel, kerosene, heating oil or gasoline. Gasoline may be used only in an emergency because it does not properly lubricate the injector pump. While using gasoline, common practice calls for the addition of at least 1 U.S. quart of clean motor oil per 15 U.S. gallons of gasoline (1 imp qt/13 imp gal; 1 L/60 L) for proper pump lubrication where available.
One large use of a military multi-fuel engine was the LD series used in the US M35 ?2 1?2-ton and M54 5-ton trucks built between 1963 and 1970. A military standard design using M.A.N. technology, it was able to use different fuels without preparation. Its primary fuel was Diesel #1, #2, or AP, but 70% to 90% of other fuels could be mixed with diesel, depending on how smooth the engine would run. Low octane commercial and aviation gasoline could be used if motor oil was added, jet fuel Jet A, B, JP-4, 5, 7, and 8 could be used, in an emergency fuel oil #1 and #2 could be used.
 
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Spectre

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Yeah, but most multifuel piston engines have not really worked out in practice. And as CrzRsn notes, you can't just switch them between one fuel and the other without adding oil to be burned (which causes its own problems).

About the only successful real-world engines that have been able to run off diesel and gasoline without needing additives are gas turbines, such as those fitted to helicopters, the Chrysler Turbine Car and the M1 Abrams tank.
 

leoparker990

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I suggest doing five minutes of reading on the basic concepts of gasoline and diesel engines. You'll quickly find the answer to your question to be "no", as Eye-Q said.
Yes, you are right, i have studied the basic concepts of gasoline and diesel engines and i found the answer, thanks to all.
 
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