Interesting, backstreet mechanics
Discussion
Saw this article on autoblog.com and had a read. http://www.autoblog.com/entry/1234000703062444/
Also more here: http://somender-singh.com/
What's the consensus, is he a crank or someone who had made a genuine breakthrough but no one want's to know due to the "not invented here" syndrome.
Can't make up my mind personally. His invention, on the face of it seems to make sense. But no one has bitten his arm off as you'd expect if it truely worked.
Andy
Also more here: http://somender-singh.com/
What's the consensus, is he a crank or someone who had made a genuine breakthrough but no one want's to know due to the "not invented here" syndrome.
Can't make up my mind personally. His invention, on the face of it seems to make sense. But no one has bitten his arm off as you'd expect if it truely worked.
Andy
just read the article,very interesting. nothing too difficult to implement in any new car. hope it works. can i get a retro fit for my jag ? 20mpg if i drive like my dad.
thing is we are always looking for more technology to solve our problems. with little or no resources he was forced to start at the beginning. good luck to the man.my middle name is singh,never had an interesting idea that worked yet...
thing is we are always looking for more technology to solve our problems. with little or no resources he was forced to start at the beginning. good luck to the man.my middle name is singh,never had an interesting idea that worked yet...
Well, it's a theory and I would hope that there are enough open minded Engineers out there who'll give it a try.
The issue will really come down to whether the engines are going to be manufacturable, and whether they can meet emissions standards.
The fact is that if the goal was to use the least fuel, there are plenty of available technologies out there that can do the job right now. However, we want a controlled SET of emissions, so trade offs are made and that means in many cases running richer and with less spark advance than a fuel miser might like.
It really needs to be the subject of an SAE paper to gain world credibility.
The issue will really come down to whether the engines are going to be manufacturable, and whether they can meet emissions standards.
The fact is that if the goal was to use the least fuel, there are plenty of available technologies out there that can do the job right now. However, we want a controlled SET of emissions, so trade offs are made and that means in many cases running richer and with less spark advance than a fuel miser might like.
It really needs to be the subject of an SAE paper to gain world credibility.
I still haven't figured out how it is supposed to work other than that it somehow promotes turbulence. I'm skeptical of any claims for huge improvement after the amount of effort that mainstream manufacturers have been into combustion chamber design over the years, I think I'd want a clearer understanding of what it was supposed to do before I bought into it. The fact that the large manufacturers have scorned his ideas makes me suspect that he's onto a red herring.
For obvious reasons the compression ratio is very limited, seems like a good idea but Mitsubishi got there first with their GDi engines which can run a very lean mixture due to its carefully designed injection system to surround the spark plug with the correct air/fuel ratio under part load conditions.
If people really cared that much about fuel economy they would probably have water injection systems.
If people really cared that much about fuel economy they would probably have water injection systems.
Not one single dyno graph to backup the power/torque results.
All the examples involved an engine rebuild to a greater or lesser extent and the engine ran better afterwards. Spooky.
All the examples were on old design engines.
As for the 'running an engine lean', sounds remarkably like 'lean burn' to me.
I would say that the case is unproven but worth monitoring.
I hope he gets some proper funding for some real tests.
All the examples involved an engine rebuild to a greater or lesser extent and the engine ran better afterwards. Spooky.
All the examples were on old design engines.
As for the 'running an engine lean', sounds remarkably like 'lean burn' to me.
I would say that the case is unproven but worth monitoring.
I hope he gets some proper funding for some real tests.
denisb said:
Not one single dyno graph to backup the power/torque results.
Did you actually read the whole article? The cost of a dyno test in India is apparently about $500, twice the average anual income.
From the description it sounds like the modifications would actualy decrease the compression ratio slightly as it involves carving grooves into the combustion chamber.
denisb said:
Not one single dyno graph to backup the power/torque results.
Not quite true. If you read the article and follow some of the links you'll find that Briggs & Stratton donated an ancient side valve engine for testing.
This was tested on an official dyno and results were produced. The result was a significant (20% -?) increase in fuel economy, but no improvement in emissions. There was a reduction in exhaust temp and engine running temp too.
I'd agree these results are inconclusive but at least show promise.
The cynic in me says that if you do anything to a Briggs & Stratton side valve engine you'd get an improvement, but at least these tests were carried out in a scientific manner so should have kept conditions for the test engine and benchmark engine similar.
Andy
There's an article at
http://fueleconomytips.com/index.php?
And others discussing it at:
www.mpgresearch.com/viewtopic.php?t=160
So far everyone has been pleased with results. Driveability vastly improved as are initial mileage numbers. Mileage should go up further as engines are broke in and systems are optimized for the grooved heads. Hope to have first of dyno numbers in near future. I'll let you know how it turns out.
http://fueleconomytips.com/index.php?
And others discussing it at:
www.mpgresearch.com/viewtopic.php?t=160
So far everyone has been pleased with results. Driveability vastly improved as are initial mileage numbers. Mileage should go up further as engines are broke in and systems are optimized for the grooved heads. Hope to have first of dyno numbers in near future. I'll let you know how it turns out.
Gassing Station | Engines & Drivetrain | Top of Page | What's New | My Stuff