Clever Turbo Surge Solutions

[@RadDadisRad]

Also using a close loop fueling table and a boost bypass to vent the blown off air directly into the exhaust to create a post burn chamber in the exhaust turbine can allow the engine to idle down without surge while keeping the turbo nice and hot and in boost.

[@imakedookie]

so no recirc, no internal wastegate - - you would want as much control over this as possible.. electronic wastegate, plumbing excess boost directly behind turbo. So post-burn chamber, does that count as anti-lag in the sense of it combusting post-work? or is the closed loop keeping stoich in consideration outside the combustion chamber?

[@hasole9669]

Very cool use of emap and using dbw throttle as an active big. There goes 2 more analogue inputs..

[@SuperSchnabulator]

Very cool to see that on a car. I used to be an aircraft engine mechanic. Every modern passenger aircraft engine has that system. It’s called “bleed valve”.

[@jareknowak8712]

Yes, basically all inventions that appeared in car engines were used earlier in aviation.

[@brianbob7514]

@@jareknowak8712 I think it is actually the other way around

[@chippyjohn1]

@@brianbob7514 Forced induction, turbos, superchargers, intercoolers, nitrous, water-meth, high octane fuel, liquid cooling, multivalve, overhead cams, sodium filled valves, fuel injection plus a lot more came from aviation. Automotive is about 60 years behind except in electronics.

[@MrAndrius12]

Glad someone finally mentions this! :D

[@pab3783]

92/80?!?! That’s a healthy unit.

[@PANTYEATR1]

HPA🏆🏆🏆

[@robhudson6133]

Didn’t in older f1 cars use a larger t/b in front of the turbo to cavitate the compressor to get around surge and decrease lag??

[@ManagerVitaly]

In all these kinds of videos, people keep saying (the turbo is trying to supply more air than the engine can swallow). This isn’t true, it’s an aero dynamical issue stalling and surging the centrifugal compressors.

[@jareknowak8712]

Much better solution is to bleed the air and keep the turbine spinning, than to drop the exhaust pressure and slow down the turbine.

[@BigGroupHug]

Bloody brilliant

[@RadDadisRad]

You can use an eBOV instead of a poorly sealing butterfly valve.

[@2511jeremy]

They've been unreliable from what I've seen

[@thedaredevil1907]

@@2511jeremy witch car ha a problem with them ....from the 3 cars I saw them testing on they heald up just fine ....genuinely curious with one of the cars had the problems and what went wrong 🤔

[@chippyjohn1]

@@thedaredevil1907 big boost makes a seat style valve hard to control, the same as a wastegate.

[@607CHA]

With new styles of turbo mostly have anti surge housings is it needed to have a bov?

[@SavageBunny1]

City busses here in San Diego flutter all the time, I've always wondered what kind of damage it's doing, they also brak down all the time 🤣

[@hpa101]

If its happening while the throttle is closed its probably not their reliability issue to be fair, but interesting to know haha, cheers for sharing - Taz

[@MarshalStomm]

Are they CNG busses? I'm a trucker and part of our fleet is CNG tractors. They all have the same Cummins engine, and that thing flutters like crazy. Letting off the pedal after hammering it for just a few seconds would get you a good flutter noise. EDIT: Managed to find what seems to be a fairly complete list of busses they use, and the vast majority of the larger busses are CNG powered with Cummins engines. Our oldest CNG tractors are 10 years old now, and we got some new ones last year, complete with the flutter, so I'm guessing there is an advantage, or at least no disadvantage, with letting those CNG engines flutter like that.

[@Smērītis]

How does the ethrottle seal and not be blown open at high boost?🤔

[@chippyjohn1]

It's a butterfly valve.

[@timothy7754]

? could you use oxygen tank or co2 to spool the turbos fasters? not (nos) to spool.

[@hpa101]

kzbin.info/www/bejne/ooG0oqB5nrugm8U

[@yolofullsend]

More air than the engine can consume- at that low of turbo wheel speed.

[@AustenWard]

What vehicle is the small dbw throttle off please?

[@Joni86p]

I think its bosch 32mm from lada

[@jesus_built_my_hotrod]

Very clever

[@hyper8545]

I see a lot of people run no bov 🤷

[@59vaughn]

Could ya use some pictures on the next time you explain this..??..maybe with colors and dramatic emphasis markings like boom and pow and whoosh and....😜

[@dantomarchio9710]

Emtron 👍👍

[@Deep42Thought]

so all this + electronically controlled wastegate + freevalve i'm happy that internal combustion engine is dead now all this will lead to ity tiny bity -100500 cylinder engine with all those tech to pass emission and be dead after warranty miles

[@jareknowak8712]

Please, leave the room.

[@starfox_wr-45e93]

Shortly after that happens... we all get to enjoy batteries dying just after warranty instead. The future is indeed bright 🤣

[@tipnoel]

@@jareknowak8712 my guy wants an air-cooled single-carb N/A SOHC V16 with a mechanical throttle body

[@mixxeerr]

Very clever