Electric turbos coming to offset turbo lag
#11
Senior Member: Will
#13
Senior Member
#14
Senior Member
#15
He cannot help himself (and no one is going to be able to help him either...)
It is an interesting topic however in that FI applications have R&D underway to make them effect more efficient. A blower is parasitic whereas a turbo is not. That said, the introduction of electronic / electric mechanical activity in a daily use situation might prove useful overall.
How cool to be able to have much bigger compressors and make the power of a diesel in a very small displacement platform essentially in stock form?
It is an interesting topic however in that FI applications have R&D underway to make them effect more efficient. A blower is parasitic whereas a turbo is not. That said, the introduction of electronic / electric mechanical activity in a daily use situation might prove useful overall.
How cool to be able to have much bigger compressors and make the power of a diesel in a very small displacement platform essentially in stock form?
Last edited by jwanck11; 04-27-2017 at 11:01 AM.
#16
Everyone thinks that, but it's not true at all. Adding a turbo introduces parasitic losses, they just aren't as obvious because they don't come from a mechanical connection to the crank. However, the turbine stage of a turbo significantly increases exhaust port pressure, which increases the pumping work the engine must overcome. These losses are generally lower than the parasitic losses associated with a crank driven supercharger, but are not negligible. Having the turbine very close to the exhaust ports can also introduce some nasty wave dynamics that affect cylinder to cylinder breathing as well.
#17
Senior Member
2 With the small, light weight, fast spooling turbo's used on the EB engines turbo lag is virtually non existent.
#18
#19
Electric power assist is really the more road tested (and imo better) way to go. A single electric generator/motor between the transmission and motor, just like in most today's hybrids (I think the Ferrari hybrid used this also) would provide for the gap in power while the turbo spools up (or the engine kicks in during start/stop). It's a pretty simple system, time tested, and wouldn't add too much weight or maybe even price. I'm surprised Ford didn't consider this when they switched to aluminum, as it would improve mileage even more while only adding a modest amount of weight back.
#20
to speak to your second point. That makes sense for the current turbo application. You decide to ad a larger turbo then it becomes very beneficial.