Cool piston tech

[oilhammer]

Secondary air injection and exhaust gas recirculation are both still in wide use today. And some that did go away, came back.

 

[dieselover2]

It isn't always a given that an add-on engine modification has an equal chance of showing up on the assembly line. A close friend of mine spent at least 5 years developing a 2nd stage device that the factory injector is piggy-backed onto. His theory that increasing surface area contact of the fuel to air at the molecular level would improve both power and combustion efficiency was documented on two different gasoline engines. He got an appointment with Bosch in Germany, taking with him his recorded engine laboratory test data done under varied conditions of octane, temp, rpm, fuel to air proportion, valve timing, injector timing,etc. He was a perfectionist and left no stone unturned. He presented it to Bosch's engineers, found them to be keenly interested in his invention, and returned home to the U.S. with what appeared to him and his lawyer to be a promissory agreement, pending actual road driven digital data from a x-country trip in U.S. With that he called Bosch back, got another appointment to see them and returned back to Germany with his lawyer in tow and his x-country data co-signed by an internationally certified engineering test drive group. Unfortunately, he was never invited upstairs where the real decisions are made and returned home disgusted and empty-handed. His take on it was that they might be interested in buying his patent pending out-right for not much more than he had in monetary investment, which I recall was about $200,000 USD, not including his labor. As others have pointed out, vehicle mfg's are paying their own engineers to step around patent pendings, so why should they pay shade-tree inventors a percentage of their sales?

 

[Figster]

It isn't always a given that an add-on engine modification has an equal chance of showing up on the assembly line.
.....snip.....
As others have pointed out, vehicle mfg's are paying their own engineers to step around patent pendings, so why should they pay shade-tree inventors a percentage of their sales?

There is a WHOLE lotta "not invented here" syndrome alive and well in the auto industry. Achates power is a case in point. I've been following them for quite a while and they have plenty of data showing that their opposed piston diesel engine is more efficient than the standard 4 stroke diesel and can be made today to meet the future Ultra low nox and PM regs for California. The only somewhat commercial variant of it being developed (that I know about) is a combat engine for the Army.

 

[jimbote]

 

[jmodge]

Thanks for posting that, interesting avenue to dig into

 

[turbobrick240]

It's an interesting idea, but the Speed of Air group seems very gimmicky/snake-oily. We'll see if it ever catches on.

 

[Zak99b5]

Dude in that video is selling it as well. He tries to come off all skeptical, but then is Fully convinced they are the bees knees just by what the fat guy says, looking at and gathering zero data.

 

[turbodieseldyke]

His momma taught him to be a skeptic until he's a believer. Are you calling his momma a liar??? He also apparently has a cameraman filming him 24/7 in case any historical moments happen, such as when his secretary called to let him know the Canadian Dimpleman is here to see him and aboat to walk in.

 

[jmodge]

My Jetta is actually very quiet. Maybe my pistons got dimpled

 

[turbobrick240]

Science.

 

[dieseldonato]

That garbage has been around for many years. Mercer energy bit into it and had the pistons done on 2 G399 cat natural gas engines running generators. Didn't increase efficiency, or reduce any emissions. No reason to believe it does anything for a diesel either. Besides that if it did work every oe would be using it. Meeting emissions was one of the biggest packaging, cost intensive things they had to deal with. If simply putting a bunch of dimples in pistons would have yielded anything real reductions it would have been done.

 

[jmodge]

That garbage has been around for many years. Mercer energy bit into it and had the pistons done on 2 G399 cat natural gas engines running generators. Didn't increase efficiency, or reduce any emissions. No reason to believe it does anything for a diesel either. Besides that if it did work every oe would be using it. Meeting emissions was one of the biggest packaging, cost intensive things they had to deal with. If simply putting a bunch of dimples in pistons would have yielded anything real reductions it would have been done.

Killjoy

 

[lemoncurd]

Besides that if it did work every oe would be using it

logical fallacy detected
argumentum ad antiquitatem

If simply putting a bunch of dimples in pistons would have yielded anything real reductions it would have been done.

idk... if you watched the video linked right above your comment, it seems theyre doing more than "putting a bunch of dimples in pistons"
the ring is different, it has a coating, CR is different, etc.

hell, if it was just putting dimples in your piston, everyone would be pouring ball bearings into the intake manifold right off the lot!

 

[dieseldonato]

logical fallacy detected
argumentum ad antiquitatem


idk... if you watched the video linked right above your comment, it seems theyre doing more than "putting a bunch of dimples in pistons"
the ring is different, it has a coating, CR is different, etc.

hell, if it was just putting dimples in your piston, everyone would be pouring ball bearings into the intake manifold right off the lot!

The coating is new, there weren't any coating used on the g399 engines, however coating pistons isn't new, nor is coating the combustion chambers. Changing compression ratio also wasn't done, although I can see rhe basic benefit, lower combustion temps/ pressures leads to lower n0x emissions. One of the reasons cooled egr was introduced first. Displace some oxygen and get a colder combustion event. Not as efficient and won't make the same power vs an engine that doesn't have egr. Hence why egr is turned off at a certain throttle/load.

 

[turbobrick240]

I don't see guys lined up around the block to buy these miracle pistons. Maybe they need to throw in a set of Ginsu™ steak knives with each purchase.

Here's some conversation over at BITOG. I like the Honda design.

https://bobistheoilguy.com/forums/threads/dimpled-pistons-available-today-for-some-engines.380869/

 

[turbodieseldyke]

I don't see guys lined up around the block to buy these miracle pistons.

Even if it was proven miracleware, what would be the ROI for rebuilding a perfectly good engine? 400,000 miles?

 

[dieseldonato]

Even if it was proven miracleware, what would be the ROI for rebuilding a perfectly good engine? 400,000 miles?

Depends on the engine, use, upkeep. 400k would be a pretty short life for an otr engine . Don't quite know how miles translates to hours in equipment, but on average somewhere between 8-10k hours would be a general idea for rebuild. (Application dependant.)

 

[turbobrick240]

I don't think they'd ever recoup the cost. A set of 6 for a 5.9 Cummins is like $3500. You can get a set of Mahle coated pistons with the Total Seal rings for a third of that. The big mfrs aren't afraid to use unconventional piston designs if they can find an advantage. The Volvo wave top piston is a good example.

Technology award for wave piston design that lowers fuel consumption

The Volvo Group’s new truck engines are more fuel efficient as a result of their intelligent piston design. Waves have been added to the piston crown to improve the use of oxygen. The engineers behind the innovation have now received the Volvo Technology Award 2017.

www.volvogroup.com

 

[turbodieseldyke]

Don't quite know how miles translates to hours in equipment, but on average somewhere between 8-10k hours would be a general idea for rebuild.

60mph x 8-10k hr = 480-600k mi