What actually happens is that the piston compresses the air and on the power stroke that same compression pushes it back down. The parisitic power loss from this operation is minimal. If the valves were held open the reciprocating pistons would in effect become part of the intake manifold and have a continiously varying manifold volume. As such would cause erratic manifold pressure changes, unreliable MAF/MAP sensor readings and so on.
If it fired on every other intake stroke then you'd just have a dead cylinder drawing oxygen in and spitting it out into the exhaust stream. Then, this pulse of oxygen would get to the oxygen sensor. The oxygen sensor will detect this high O2 content and think there's not enough fuel and increase the injector pulse width to compensate. Then your emissions would be all screwed up. Leaner mixtures also put out more oxides of nitrogen and that's bad stuff.
Even when you're idling the oxygen sensor is giving feedback to the PCM. So, ideally you're running the stochiometirc fuel/air ratio, all cylinders are firing, emissions are low and RPMs are high enough to keep the engine alive. An engine needs to be at a certain RPM while idling to be able to respond to changing demands. If the idle is too low, when you snap open the throttle the manifold pressure increases to atmospheric pressure and the incoming air charge stalls and of course the engine stalls.
There is a "new old" concept engine being produced by GM based on the concept of the old V-8-6-4 that was a total failure because it sucked. The new idea employs the same concepts but much more thoroughly with the help of computer controls. This of course involves mechanical functions such as being able to cut off hydraulic pressure to a cylinder's valves causing the valves not to open. You won't be able to program this feature into a PCM.
Don't forget what'll happen if you try to transfer the support contract to another owner. You'll end up paying for a service that you'll never recieve.
I think the smell would be nothing compared to the mess it would make while traveling. The oil in 2-stroke engine fuel comes ot the exhaust as atomized oil(only the fuel gets burned). Having the motor in front with no piping to put the exhaust behind the rider would be quite messy and smelly. All you 2-stroke R/C enthusiasts know how much of a pain that oil is.
Some ILEC will make a "donation" to the FCC or some FCC controlling element and it'll never have the freedom we need to make our dreams of a telco free life happen.
"That's like citing Firestone tires on Ford Explorers as proof that tires are less reliable than they were back in the sixties."
Speaking of which. This whole Firestone thing problem started because of Ford's inability to troubleshoot a real problem with their vehicles. Explorer customers were coming in with complaints about their SUVs riding with a vibration. The technicians at the dealers were unable to determine the cause of the problem so they'd call up the Ford Tech Line and ask the techs if they've heard of any such problems and if so how could it be repaired. Unfortunately Ford was unable to come up with a solution to the vibration and insted opted to take a band-aid fix to the problem. Techs were instructed to lower the tire pressure on the Explorers to make the ride smoother. A quick lesson on tires... when you lower the tire pressure the tire generates more heat from the increased rolling resistance. Just about every case of Firestone tires blowing up on Explorers can be traced to insufficient tire pressure. Ford, go figure.
I am the statistic. I used to work in a data center doing sys admin work and we had about 30 IMB hard drives ranging from 30-60 GBs. Keep in mind this is a data center. The temperature was always kept nice and cold, the humidity was controlled, and the power was conditioned through a UPS with battery backups and a diesel generator... the whole nine yards. Thankfully most of these drives were put in relatively unimportant servers, but in the end about 75% failed.
It's nice to know that punk will never step foot on American soil again. Good riddance. Someone deserves a beatdown. Porn site creators/admins have some striking similarities to spammers. Anyone else ever notice that?
This P3 that I'm running right now has been well on it's way to being a piece of lost history since the day it came out.
I don't believe PCs will become a collector's item. There aren't many things that are such a big part of our lives that can become collector's items. If you're thinking of automobiles as collector's items you're right but remember that even an old 1929 Plymouth can be driven and used like a normal vehicle not counting the babying you give it because it's old. What are you going to do with a 286? Nothing. See, unlike old cars, old computers can't serve a purpose and aren't interesting. There are a few of you out there that may disagree and think old computers are interesting. But back to the idea of what makes it a collector's item, people want it.
Yeah, but this is/. I know what cited sources are but asking for it is a bit much. If you're wondering about the validity of some information go research it yourself.
Slashdot Mirror
Probably not, as long as they got the memo that a foot is different than a meter.
They're illegal? Now that I know that I'll be sure to not use mine!
It's like having a 14 MB image load everytime you go to /. except it's text.
..another company in the news lately. Anyone heard of SCO?
I'll gladly pay $13 for a full album full of good songs, I dunno about a whole CD for just one or two songs.
there is no spoon.
Can we leave the lowercase "x" out. Please, I think it has been worn out already. That "x" is so 2002.
for any rocket.
What actually happens is that the piston compresses the air and on the power stroke that same compression pushes it back down. The parisitic power loss from this operation is minimal. If the valves were held open the reciprocating pistons would in effect become part of the intake manifold and have a continiously varying manifold volume. As such would cause erratic manifold pressure changes, unreliable MAF/MAP sensor readings and so on.
If it fired on every other intake stroke then you'd just have a dead cylinder drawing oxygen in and spitting it out into the exhaust stream. Then, this pulse of oxygen would get to the oxygen sensor. The oxygen sensor will detect this high O2 content and think there's not enough fuel and increase the injector pulse width to compensate. Then your emissions would be all screwed up. Leaner mixtures also put out more oxides of nitrogen and that's bad stuff.
Even when you're idling the oxygen sensor is giving feedback to the PCM. So, ideally you're running the stochiometirc fuel/air ratio, all cylinders are firing, emissions are low and RPMs are high enough to keep the engine alive. An engine needs to be at a certain RPM while idling to be able to respond to changing demands. If the idle is too low, when you snap open the throttle the manifold pressure increases to atmospheric pressure and the incoming air charge stalls and of course the engine stalls.
There is a "new old" concept engine being produced by GM based on the concept of the old V-8-6-4 that was a total failure because it sucked. The new idea employs the same concepts but much more thoroughly with the help of computer controls. This of course involves mechanical functions such as being able to cut off hydraulic pressure to a cylinder's valves causing the valves not to open. You won't be able to program this feature into a PCM.
Don't forget what'll happen if you try to transfer the support contract to another owner. You'll end up paying for a service that you'll never recieve.
...the sysadmins that run the linked site in the article get a payraise for dealing with a /.ing.
I think the smell would be nothing compared to the mess it would make while traveling. The oil in 2-stroke engine fuel comes ot the exhaust as atomized oil(only the fuel gets burned). Having the motor in front with no piping to put the exhaust behind the rider would be quite messy and smelly. All you 2-stroke R/C enthusiasts know how much of a pain that oil is.
Some ILEC will make a "donation" to the FCC or some FCC controlling element and it'll never have the freedom we need to make our dreams of a telco free life happen.
Everyone knows it's because of he pigeons. Everytime you have an analog element, such as a pigeon, in the equation your end result will vary.
overclocking??!
"That's like citing Firestone tires on Ford Explorers as proof that tires are less reliable than they were back in the sixties."
Speaking of which. This whole Firestone thing problem started because of Ford's inability to troubleshoot a real problem with their vehicles. Explorer customers were coming in with complaints about their SUVs riding with a vibration. The technicians at the dealers were unable to determine the cause of the problem so they'd call up the Ford Tech Line and ask the techs if they've heard of any such problems and if so how could it be repaired. Unfortunately Ford was unable to come up with a solution to the vibration and insted opted to take a band-aid fix to the problem. Techs were instructed to lower the tire pressure on the Explorers to make the ride smoother. A quick lesson on tires... when you lower the tire pressure the tire generates more heat from the increased rolling resistance. Just about every case of Firestone tires blowing up on Explorers can be traced to insufficient tire pressure. Ford, go figure.
I thought this was an article about counter-strike myself, how misleading.
I am the statistic. I used to work in a data center doing sys admin work and we had about 30 IMB hard drives ranging from 30-60 GBs. Keep in mind this is a data center. The temperature was always kept nice and cold, the humidity was controlled, and the power was conditioned through a UPS with battery backups and a diesel generator... the whole nine yards. Thankfully most of these drives were put in relatively unimportant servers, but in the end about 75% failed.
Good point, you got me there. I suppose even the first toaster could be a collector's item too.
No, because people want it. So now it's a collectors item. Understand post before replying.
It's nice to know that punk will never step foot on American soil again. Good riddance. Someone deserves a beatdown. Porn site creators/admins have some striking similarities to spammers. Anyone else ever notice that?
This P3 that I'm running right now has been well on it's way to being a piece of lost history since the day it came out.
I don't believe PCs will become a collector's item. There aren't many things that are such a big part of our lives that can become collector's items. If you're thinking of automobiles as collector's items you're right but remember that even an old 1929 Plymouth can be driven and used like a normal vehicle not counting the babying you give it because it's old. What are you going to do with a 286? Nothing. See, unlike old cars, old computers can't serve a purpose and aren't interesting. There are a few of you out there that may disagree and think old computers are interesting. But back to the idea of what makes it a collector's item, people want it.
I live in a cave with DSL and I pedal to power my computer and my hamster generates enough power at night to keep the BIOS settings.
Yeah, but this is /. I know what cited sources are but asking for it is a bit much. If you're wondering about the validity of some information go research it yourself.