Single-cylinder Hydra engine. Image: Delphi
If you want ON or OFF the DIESEL ”KnOcK” LIST just FReepmail me.....
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Posted on 05/21/2012 11:29:02 AM PDT by Red Badger
Running a diesel like engine on gasoline is something Delphi is doing in notable fashion. They claim they are on to a promising way to enjoy an engine that gives the vehicle owner high efficiency and low emissions. Delphi, a major Michigan-based auto-parts supplier, is developing this technology which has shown impressive results in tests. Delphi tried out its combustion concept, which reaps the best of two worlds of low-emission gas and efficient diesel engines. Delphi claims its technology is an improvement upon the fuel economy of gas-powered cars, and can bring forth benefits of the hybrid at less the cost of a large battery and electric motor.
Running a diesel-like engine on gasoline is something that researchers have tried in the past. Diesel engines are 40 to 45 percent efficient in using the energy in fuel to propel a vehicle, compared to roughly 30 percent efficiency for gasoline engines. But diesel engines are dirty. As the Delphi engineers say, “Diesel engines are challenged to meet future stringent NOx and PM emissions regulations at acceptable cost.”
Tested on a single-cylinder engine, Delphi's approach is called a gasoline-direct-injection compression ignition. Engine-operating strategies leverage advanced fuel injection and air intake and exhaust controls. The researchers wrote a technical paper on the subject, which was presented at SAE, an association of engineers and other experts in aerospace, automotive, and commercial vehicle industries. Delphi’s team, Mark Sellnau, James Sinnamon, Kevin Hoyer, and Harry Husted are the authors of the paper, “Gasoline Direct Injection Compression Ignition(GDCI) Diesel-like Efficiency with Low CO2 Emissions.” Their experiments were carried out on a Ricardo Hydra light-duty single-cylinder engine, which they said was considerably flexible, with parts that can be easily interchanged.
“Tests were conducted at 6 bar IMEP - 1500 rpm using various injection strategies with low-to-moderate injection pressure,” they said. Their results showed that what they called “triple injection GDCI” achieved about eight percent greater indicated thermal efficiency and about 14 percent lower specific CO2 emissions relative to diesel baseline tests on the same engine.
The researchers’ reference to triple injection GDCI refers to their approach of injected gasoline in three precisely-timed bursts, avoiding the rapid combustion that has caused past experimental engines to be noisy. They also succeeded in burning the fuel faster than in conventional gasoline engines, to get the most out of the fuel.
Mark Sellnau, engineering manager of advanced powertrain technology at Delphi, says the engine could be used along with a battery pack and electric motor, as in hybrids, which may improve efficiency still more. He also added that it was not clear to him whether the cost of doing that would be worth it.
More information: Tech paper: http://delphi.com/ … -01-1386.pdf
Single-cylinder Hydra engine. Image: Delphi
If you want ON or OFF the DIESEL ”KnOcK” LIST just FReepmail me.....
This is a fairly HIGH VOLUME ping list on some days.....
Knock!............
I’m sure GM is getting right on that using an aluminum head and block. They did so well converting their gas engines to diesels in the late ‘70’s...
Sounds wonderful, but.....
We’ve been teased by radical new gasoline engine designs since the first oil embargo, almost 40 years ago.
Yet, the efficiency of affordable, mass produced engines has gone up less than 1% per year, despite tens of billions of dollars in R&D.
The story is even more dismal for mass produced electric batteries, where the efficiency has gone up less than 0.5% per year over the last 60 years.
It makes me despair that we can solve the affordable personal transportation puzzle without first pouring trillions of dollars down the toilet.
You could call it gasoline-direct-injection motor and transmission - gdimat
(pronounced “ga deye mate”
Fun video and more.
Ricardo Hydra engines...
Optical and photographic access...
Knock me please!!
Ya suppose they will get Bourked for this?
Maybe it is the rebirth of the Wankel design.
If the sell it to GM and it gets 80MPG....I....wouldn’t buy it!!!!!
I sure hope they are successful.
I sure hope they are successful.
“They did so well converting their gas engines to diesels in the late ‘70’s...”
I had 2 1966 GMC 4000 trucks with 478 diesel engines that were fantastic.
The 478 was a converted 6 cyl gas engine.
It seems that the perfection of Electronic Controls and computer management are giving bad ideas one more run for the money.
WTF is wrong with electonically managed turbo-charged diesels that can get 65 MPG in a VW TDI? O, I know, NOx. The "x" means nobody actually knows wtf it is or wtf it does to dear olde Mother Gaia's air. But it must be bad. what about Natural Gas? What about going to very low compression long stroke gasoline engines? I adnmit we're in energy trouble. Why by now, we must be down to what? 750 years supply of oil? 1,000 years of gas. 10 or twelve eons of coal.
So is this supposed to be the gasoline equivalent to the Turbo Diesel Injection engine we’re seeing in cars and SUVs lately?
one just needs steel sleeves for the cylinders to be in is what an opal mechanic told me that my vega needed back in Germany in 1977,
Remember the Caprice Classic diesel?
No but my wife had an Olds Diesel that was a pretty good car.
The 2 478 trucks that I had were trouble free for over 500,000 miles and with a 7 ton payload got 14 miles per gallon.
It is a diesel engine. It uses gasoline for fuel instead of diesel #2.
It is very interesting that they claim 8-14% improvement in thermal efficiency over diesel, which has a 13% higher btu content by volume.
“I adnmit we’re in energy trouble. Why by now, we must be down to what? 750 years supply of oil? 1,000 years of gas. 10 or twelve eons of coal.”
I think you are way off on these numbers, This is just a small fraction of what really exists. As for oil and gas, I am convinced that the earth, down deep is renewing these at a rate far beyond our usage, even projected usage. And yes, you are maybe close on the coal. :)
Btw, there is no intended /sarc in my above comments.
O no! Even though I suspect you are correct, what about the Polar Bears? What about Global Warming? What about excess CO2, NOx? My God man, you are an environmental heretic! By now you must know that fact-based arguments about hydrocarbons are futile.
“What about excess CO2, NOx?”
LOL! Right, we can’t have all that CO2 now, can we...soon the rainforests would die out and we would have no oxygen produced from them.
And about the NOx...more NOx’s produced in one good thunderstorm than from all the diesel engines in California...gues we cannot allow them thunderstorms...they are polluting...and not just NOx’s...lots of ozone too!
As for the polar bears, I think we should assign algore the job of herding them off the ice before it breaks and dumps ‘em into the sea.
As for oil and gas, I am convinced that the earth, down deep is renewing these at a rate far beyond our usage, even projected usage. And yes, you are maybe close on the coal.
O no! Even though I suspect you are correct, what about the Polar Bears? What about Global Warming? What about excess CO2, NOx? My God man, you are an environmental heretic! By now you must know that fact-based arguments about hydrocarbons are futile.
~ ~ ~
Science can’t prove it but don’t you think God’s hand is
involved in cleaning up environmental disasters? Example
would be various oil spills.
The same is true of the Gulf spill. Oil has been leaking into the oceans in huge quantities from natural sources for eons. However, let's be frank, one MSM picture of an oil-coated gull means much more to the ignorant than 10,000 facts.
No, this is a gasoline engine being run like a diesel: High compression ignition, no sparkplugs...........
-—Maybe it is the rebirth of the Wankel design.-——
The triple-injection made me think of that. You’d think that combining multiple fuel-injections with a rotary engine would significantly reduce vibration..
We measure pollution wrong since the 70’s. It should be units per mile, not units out the exhause pipe.
I
Try explaining ppm, vs millions of parts, to an English Major. Or try explaining fractions to them without bringing a pizza.
Good thought, but the Wankel seals proved to be its Achilles heel.
Pushing the compression ratio into compression ignition range would further challenge seal technology.
You’re ON der liste!.......................
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