REVERSE SPEED

geoheath · Apr 23, 2016

Since the i3 has no transmission per se, and achieves reverse by switching polarity on the DC motor presumably, it should be technically possible to drive the car in reverse at 150kph, the same as forward. Did BMW put a software limit on reverse to preclude high speed reverse?

i3an · Apr 23, 2016

Don't know. Give it a try, and let us know.

alohart · Apr 24, 2016

geoheath said:
Since the i3 has no transmission per se, and achieves reverse by switching polarity on the DC motor presumably, it should be technically possible to drive the car in reverse at 150kph, the same as forward. Did BMW put a software limit on reverse to preclude high speed reverse?

I believe the i3, like most (all?) regular production EV's, has an AC motor. But your point is still valid in that reverse is implemented by spinning the motor in the reverse direction, not be shifting gears in a transmission.

Driving with steerable wheels at the rear is much less stable than with them at the front, so almost certainly BMW has limited the reverse speed for safety's sake.

DeJay58 · May 5, 2016

It is limited to 50 kph

thefuturenow · May 15, 2016

DeJay58 said:
It is limited to 50 kph

Unless you're a getaway driver in a tough spot I don't see a need to ever drive in reverse anywhere close to 60 kph.

REVERSE SPEED

Help Support BMW i3 Forum:

geoheath

Member

i3an

Well-known member

alohart

Well-known member

DeJay58

Well-known member

thefuturenow

Well-known member

Similar threads

Latest posts

REVERSE SPEED

Help Support BMW i3 Forum:

geoheath

Member

i3an

Well-known member

alohart

Well-known member

DeJay58

Well-known member

thefuturenow

Well-known member

Similar threads

Latest posts

Join the conversation!

Join today and get all the highlights of this community direct to your inbox. It's FREE!