Rotary News: Breakthrough may give Rotary new life
#127
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I would wonder the same thing... They can sell V12 supercars, but not a 3 rotor?
EDIT:
Looks like the MPG standards for Japan by 2015 will be like 33 MPG for a 3000 lb car, and37 MPG for a 2500 lb car.
Seems like their CO2 approach is based on improved traffic flow and fuel economy more than raw CO2 emission value per vehicle. Not to say they don't test it, but I can't find any data supporting a CO2 maximum requirement.
EDIT:
Looks like the MPG standards for Japan by 2015 will be like 33 MPG for a 3000 lb car, and37 MPG for a 2500 lb car.
Seems like their CO2 approach is based on improved traffic flow and fuel economy more than raw CO2 emission value per vehicle. Not to say they don't test it, but I can't find any data supporting a CO2 maximum requirement.
Last edited by reddozen; 03-15-2012 at 03:37 PM.
#129
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Looks like the MPG standards for Japan by 2015 will be like 33 MPG for a 3000 lb car, and37 MPG for a 2500 lb car.
Seems like their CO2 approach is based on improved traffic flow and fuel economy more than raw CO2 emission value per vehicle. Not to say they don't test it, but I can't find any data supporting a CO2 maximum requirement.
Seems like their CO2 approach is based on improved traffic flow and fuel economy more than raw CO2 emission value per vehicle. Not to say they don't test it, but I can't find any data supporting a CO2 maximum requirement.
#134
Out of NYC
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I would wonder the same thing... They can sell V12 supercars, but not a 3 rotor?
EDIT:
Looks like the MPG standards for Japan by 2015 will be like 33 MPG for a 3000 lb car, and37 MPG for a 2500 lb car.
Seems like their CO2 approach is based on improved traffic flow and fuel economy more than raw CO2 emission value per vehicle. Not to say they don't test it, but I can't find any data supporting a CO2 maximum requirement.
EDIT:
Looks like the MPG standards for Japan by 2015 will be like 33 MPG for a 3000 lb car, and37 MPG for a 2500 lb car.
Seems like their CO2 approach is based on improved traffic flow and fuel economy more than raw CO2 emission value per vehicle. Not to say they don't test it, but I can't find any data supporting a CO2 maximum requirement.
An mpg requirement *is* a CO2 requirement +/-. Assuming complete combustion, which is a pretty safe assumption, 1 gallon of gas emits ~19 lbs of CO2. (Yes, it weighs more than the 6 lbs a gallon of gas weighs!) http://www.fueleconomy.gov/feg/co2.shtml
it might have something to do with the influence from other auto maker as well, but law is law, Mazda can't do **** about it.
#135
Out of NYC
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One thing for sure is that, while power gain might be small, emission will be much better, and that's probably the MOST important thing to keep Rotary Alive (2nd is MPG, just my opinion)
Last edited by nycgps; 03-15-2012 at 11:52 PM.
#136
Good points ^ no more spark plug issues, and hopefully flooding as well. I wonder how much of this technology is really under wraps from Hitomi, because he doesn't want other manufacturer's to know of it. Also, rotaries and piston engines are two completely different animals. I am wondering how this technology could apply to both powertrains for efficiency gain. I could understand the rotary, but how much more benefit would this be to a piston engine, as suggested in the article?
#137
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![Dunno](https://www.rx8club.com/images/smilies/dunno.gif)
#138
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I honestly don't see how it could be purely the government when the Ferrari 599 for example gets an EPA 15 MPG highway on a V12 engine at 3500 lbs. According to Japan's standards, They should be required to get at least 30 MPG.
I feel that there's no reason that Mazda couldn't improve the emissions enough to have a limited production 3 rotor car or engine option. I think it's more a factor of price point for that limited run, and demand for the engine than simply Japan telling them "no, never again!". If that was the case, Ferrari, Lamborghini, and all the other V10 / V12 manufacturers that get nowhere near "acceptable" MPG would never be allowed to sell cars in Japan.
I feel that there's no reason that Mazda couldn't improve the emissions enough to have a limited production 3 rotor car or engine option. I think it's more a factor of price point for that limited run, and demand for the engine than simply Japan telling them "no, never again!". If that was the case, Ferrari, Lamborghini, and all the other V10 / V12 manufacturers that get nowhere near "acceptable" MPG would never be allowed to sell cars in Japan.
Last edited by reddozen; 03-16-2012 at 07:33 AM.
#139
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I think it would be cool if mazda started offering "crate" engines like Ford and GM. they could offer several flavors of 13b's, 20b's and 26b's. they may already do this for racing teams, I don't know....
Last edited by usnidc; 03-16-2012 at 08:06 AM.
#141
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Quite true. The "ridge" presented by the center of the chamber housing at TDC presents an obstacle the air-fuel charge has to overcome as it's shoved from trailing side to leading side by the trailing edge of the rotor. The higher the mechanical compression ratio, the narrower the gap through which it can pass.
#142
Out of NYC
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I honestly don't see how it could be purely the government when the Ferrari 599 for example gets an EPA 15 MPG highway on a V12 engine at 3500 lbs. According to Japan's standards, They should be required to get at least 30 MPG.
I feel that there's no reason that Mazda couldn't improve the emissions enough to have a limited production 3 rotor car or engine option. I think it's more a factor of price point for that limited run, and demand for the engine than simply Japan telling them "no, never again!". If that was the case, Ferrari, Lamborghini, and all the other V10 / V12 manufacturers that get nowhere near "acceptable" MPG would never be allowed to sell cars in Japan.
I feel that there's no reason that Mazda couldn't improve the emissions enough to have a limited production 3 rotor car or engine option. I think it's more a factor of price point for that limited run, and demand for the engine than simply Japan telling them "no, never again!". If that was the case, Ferrari, Lamborghini, and all the other V10 / V12 manufacturers that get nowhere near "acceptable" MPG would never be allowed to sell cars in Japan.
Foreign cars are "exempt" from this "rule", That's why it made Japanese cars look pretty bad back in the days. (limited displacement and Horsepower)
the hp rule was lifted couple years ago, but emission rule stays and much tighter.
Last edited by nycgps; 03-16-2012 at 10:40 AM.
#146
I’m surprised the rotary hasn’t been shelved until Mazda can get profitable. They are on the hunt for a strategic partner and I can’t see much in the way of resources being spent on a new rotary engine. I hope I’m wrong but I would think the bean counters would be pounding on the rotary dev teams door pretty hard these days.
#147
Gold Wheels FTW
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I’m surprised the rotary hasn’t been shelved until Mazda can get profitable. They are on the hunt for a strategic partner and I can’t see much in the way of resources being spent on a new rotary engine. I hope I’m wrong but I would think the bean counters would be pounding on the rotary dev teams door pretty hard these days.
Originally Posted by nycgps
doesn't work cuz that means you're "importing" stuff and Japan has very high taxes on import goods (to protect their own local market)
Here's some info on just how easy it is / would be to import to Japan... Not trying to argue to be an ***, I just find that most of the excuses as to why they couldn't build a 3 rotor, if they actually wanted to, or if there was a market to do so, to be complete BS.
http://www.thetruthaboutcars.com/201...port-barriers/
Want to import cars to Japan? It’s one of the easiest countries to do so. Just don’t bring no stinkin’ Cavaliers!
#150
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Not specifically. He said 'shape', which implies geometry, but does not confirm it. 'Shape' could be anything from rotor spin path to housing shaping to eshaft changes to compression cavity differences. Or all of the above.