Throttle bladeless engines

[RobertISaar]

Originally Posted by Occasionally6

I do wonder if some (small) gain in reduced pressure drag might be achieve by directing the exhaust flow on a road car though.

i ASSUME some vehicles have this done already.... mostly trucks, where the tailpipe turns out after the rear wheels and they have a small section of the tailpipe "clipped".

[freebeard]

That puts the exhaust into the most turbulent air available, shortening the time for the fumes to dissipate?


Exit the exhaust into a high-bypass duct like a turbo-jet uses. That will increase the volume 2-3x and cool it with some loss of velocity. One stage, not two. Note the serrated trailing edge on the duct.

[oil pan 4]

Originally Posted by Occasionally6

The fuel systems and emission controls are inherently more complex and expensive with CI over SI.

I find the absence of emissions controls to be simple and cheap.

[Occasionally6]

Originally Posted by freebeard

Exit the exhaust into a high-bypass duct like a turbo-jet uses. That will increase the volume 2-3x and cool it with some loss of velocity. One stage, not two. Note the serrated trailing edge on the duct.

Perhaps some of the "dress tips" that most newer cars have do something similar? If not, why not? If they're there anyway...

Originally Posted by oil pan 4

I find the absence of emissions controls to be simple and cheap.

But car manufacturers don't. (And it is Ecomodder.)

[oil pan 4]

Originally Posted by Occasionally6

But car manufacturers don't. (And it is Ecomodder.)

In 1984 they did.

Its eco for economy as in saving money. I only see about 2% of the people on here trying to eco their vehicles to make them run cleaner.

Plus my diesel runs a lot cleaner now than it ever could have in 1984. I happen to like burning all the fuel and getting as much energy out of it as possible before it leaves the engine bay.

[cRiPpLe_rOoStEr]

Basically the only reason to retain the throttle-plate is braking power...

[RobertISaar]

in that instance, i'd much rather have an electric pump run as needed for vacuum, or in the case of something that would need more than what that could handle, a crank driven unit.

[oil pan 4]

Originally Posted by cRiPpLe_rOoStEr

Basically the only reason to retain the throttle-plate is braking power...

I have hydraulicly boosted brakes, no vacuum.

[freebeard]

No Jake brake?

How Jake Brakes Work

[cRiPpLe_rOoStEr]

Originally Posted by oil pan 4

I have hydraulicly boosted brakes, no vacuum.

It wasn't about vacuum. I meant engine-braking power, which is enhanced in the engines with throttle blade. No wonder Diesels are fitted with supplementary engine-braking devices.