Interesting Article on modifying combustion camber

[Q45denver]

http://www.popsci.com/popsci/f....html

[Q45denver]

Sorry wrong link:

http://www.popsci.com/popsci/f....html

[DAEDALUS]

Pretty hard to believe the suggestion that over 20% of a car's fuel consumption leaves the cylinder without being combusted. I wonder if any of the vehicles he's tried it on were fuel injected, had an O2 sensor, and/or were made in the US at any point in the past 20 years.

[DAEDALUS]

[DAEDALUS]

You read that article, as did I, and you took their reasonings and explanations on faith, backing it up with "facts" that are only related. Masked and shrouded intake ports have been used for years to increase turbulence; the benefits of turbulence is not a new concept, at least not in this country. Yes cars are inefficient. Most of the energy liberated from burned gasoline is not applied to the wheels. How does cutting notches in a head reduce friction in an automobile? How does it reduce the amount of heat waste? Do you really believe that modern vehicles are spitting out 1/4 of the gasoline they consume from the heads without even burning it? What's the O2 sensor for? Do you really believe that some guy with a dremel has found the holy grail of automotive efficiency, missed for decades by hundreds of thousands of professionals backed by many billions of dollars of research time and accurate testing equipment? Multiple spark plugs are used to decrease burn time, which puts the burn where it can give more power.

[DAEDALUS]

no. gas is not spit out of the chamber unburned. It is unburned Hydro-Carbons that are pushed out off the exhaust. This causes an increase in emmissions. If you could reduce the number of unburned Hydro-Carbon, it would be possible to run a car with no Cats, and it would still be legal.

Ah...so it's not gasoline, but unburned hydrocarbons, eh? And the only function of the cats is to reduce unburned hydrocarbons?

Quote »You're right. The concept has been around in the US for a while. Has it been put in to mass use? Nope. Take the heads off of most american/japanese/korean/german and any other car, and you will see that they are very smooth. They do not use the turbulance therory, in the heads themselves, at least. Now, if you study the intake manifolds on most higher end cars, you will see that they are engineered to induce turbulance.[/quote]Really? Which higher end cars have this done? If makers know about it, but don't use it, what does that tell you about the gains?

Quote »I don't know what happened, but when he had the engine tested, it showed a generally decreased operating temperature.Possibly Q45Tesh could explain this. [/quote]Maybe the article already did. “The problem is, it’s a side valve,” explains Steve Weiner, a 35-year Porsche race-tuning veteran and the owner of Rennsport Systems in Portland, Oregon. “Nobody’s been using those things in our world since the 1950s. Not even on lawn mowers. They’re hugely inefficient and dirty.”

Quote »Measures how lean or rich the engine is running(don't know exactly how?), then changes the air/fuel ratio to correct the problem. [/quote]Let me ask it a different way...what does running rich and running lean mean? If a car is always teetering between rich and lean is it wasting much fuel?

Quote »It's possible. Is it your thinking that because it didn't take a billion dollars, it must not be right? Sometimes it takes an outsider to solve a problem. [/quote]Even if it has already been solved?

Quote »Also, he has the patent for his design. So, to use his system, manufactuerers have to pay him. [/quote]Amazing none have stepped up to do so. A major car company would save/make boatloads of money if it could improve every single car's fuel efficiency by 4mpg or more.

Quote »It creates a more thourough burn. This reduces the amount of unburned hydro-carbons. [/quote]Wrong. If the mixture isn't right, it won't burn no matter how many plugs you have. If the mixture is right, then a thorough burn will happen. The speed of the burn is all that's changed.

[DAEDALUS]

This forum is for serious discussions on engineering talk, not for wasting time trying to teach engine basics to stubborn paranoid delusionals who think they know what they're talking about but obviously (and painfully) don't.

[maxnix]

This forum is for serious discussions on engineering talk, not for wasting time trying to teach engine basics to stubborn paranoid delusionals who think they know what they're talking about but obviously (and painfully) don't.

Geez, where does it say the correspondents have to be from the same planet?

[Q45tech]

They let him back on the General Forum but here is off limits.......I deleted his posts!

[maxnix]

Ok then. If I'm not aloud...

Then that is better. A little quiet contemplation and research would help also.

Noise for its own sake is not appreciated.