kermit_rr said:

Maybe we've reached a point where the spotty yoof designers and engineers understand ev more than traditional engines so they are able to design them properly

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Nodge68 said:

You have to remember that the EV as they are is an emerging technology.
The ICE vehicle has been under constant development for over 100 years, and is still hugely inefficient.

Just imagine how advanced EVs will be in 100 years!

I've a theory that the electrical systems of EVs are more reliable, simply because they're not subjected to vibration in the same way that an engine powered vehicle is.
Almost all wiring and connector issues in vehicles is caused by vibration, which the EV is devoid of. This should increase reliability of such items, providing the manufacturers actually built them properly.

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kermit_rr said:

I would argue more vibration comes from the road especially with our use of large wheels, ultra low profile tyres and hard suspension

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Nodge68 said:

Road vibrations are low frequency, higher amplitude vibrations, which don't really effect wiring or connections to any great degree, how reliable are ABS sensors, which are only subject to high amplitude, low frequency movement.
What does effect connections is high frequency, mild amplitude vibrations, which changed in frequency constantly, allowing wiring, connections and control modules to go through various resonances as the frequency varies. Electric components on a ICE vehicle are bombarded with hundreds of millions of engine derived vibration cycles over the vehicles life, so there's bound to be failures over time.

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kermit_rr said:

I'm sure the same will happen to ev 'engines' given time, folks pushing/hacking them past their design limits of power/lifespan etc

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kermit_rr said:

They still have bearings which will wear out and vibrate, there must be some kind of engine mount to absorb flex etc. Everything goes out of spec eventually, it's called end of design life

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Nodge68 said:

Possibly, there's more scope for ridiculous performance increases with an EV compared to an ICE vehicle.



Have you driven an EV? I've driven a few from different manufacturers. One thing that stands out is just how completely vibration free they are.
After driving an EV for a couple of hours, I actually feel like my Freelander 2 is an absolute dinosaur by comparison, simply because the thing vibrates so much, and the Freelander 2 is actually very civilised compared to many diesel powered vehicles.
The difference between an EV and ICE vehicle is night and day.

Yes you are correct, they do have bearings to wear, but how often will that be, when was the last time you changed a bearing in a gearbox? Roller bearings have a much longer life than plain bearings with an oil feed, especially if the rollers aren't subjected to vibrations, which they aren't in a EV.

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kermit_rr said:

Never driven an ev,

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Nodge68 said:

EGR is getting more common, and direct injection has been a thing for a while now.
Both these are having an effect on long term engine reliability, which will only get worse.


It seems that way.
Some manufacturers are also using electric motors connected to the crankshaft to boost engine power when needed (called a mild hybrid), which effectively gives a turbo type boost, only without the turbo.

Long term I don't know how reliable or useful these systems are, but they do have one benefit I can think of, which is to use energy from slowing down to charge the batteries, which can then be used to aid acceleration later on.
Whether it's worth the trouble long term, I guess time will tell.

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kermit_rr said:

I would argue more vibration comes from the road especially with our use of large wheels, ultra low profile tyres and hard suspension

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lynall said:

I never understand that on EVs, fat wheels and really small sidewall tyres!

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kermit_rr said:

Never driven an ev, not even a milk float!
I'm just trying to think of the abuse new ev cars will get, given the lack of maintenance, sealed for life etc

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kermit_rr said:

I don't understand it on any car

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