X2 downhill speed limitation

[felix_fetche]

hi,
at climbing (uphill) the unit reach full speed, but after passing the top and
starts the regenerative effect, is appearing the unhappy face together with
the triangle with exclamation sign inside. the gradient of hill is not over 10%.
at gradient smaller than 5-7% limitation goes off.
i have to say that i have one AH and one AF batteries installed.
any idea?

[Tritium]

The X-Series software handles hills differently than the i and e-series do.
What you describe sounds normal for an X2

[felix_fetche]

ye ye,
that`s why i`m posting this because i2 i drove don`t act to limit speed on down the hill.
probably is about regenerative break function. X2 with big diameter of the wheels
creates to high RPM on motors, and gearbox is same like i2. may generate an amount
of energy that batteries or power triphase H bridges cannot absorb it.
this could be a reason that needs to slow down.
thanks mate!

[KSagal]

Originally Posted by felix_fetche

ye ye,
that`s why i`m posting this because i2 i drove don`t act to limit speed on down the hill.
probably is about regenerative break function. X2 with big diameter of the wheels
creates to high RPM on motors, and gearbox is same like i2. may generate an amount
of energy that batteries or power triphase H bridges cannot absorb it.
this could be a reason that needs to slow down.
thanks mate!

I agree the software is different, but it seems to me, with bigger tires, the rpm of the motors for any given speed is smaller on the X2 than an i2.

Torque on motors is higher, but rpm is lower with the larger tires.
Torque on motors is lower, but rpm is higher with the smaller tires.

[terryp]

Originally Posted by felix_fetche

hi,
at climbing (uphill) the unit reach full speed, but after passing the top and
starts the regenerative effect, is appearing the unhappy face together with
the triangle with exclamation sign inside. the gradient of hill is not over 10%.
at gradient smaller than 5-7% limitation goes off.
i have to say that i have one AH and one AF batteries installed.
any idea?

Gen. 1 machines didn't limit downhill speed - except on a full charge, but my i2 does exactly the same thing you describe on any reasonably steep downhill.

[gbrandwood]

i2 and x2 both limit down hills but the x2 limits more. That is my understanding.

[ben fairn]

Originally Posted by gbrandwood

i2 and x2 both limit down hills but the x2 limits more. That is my understanding.

And I think the x2 golf version I have limits downhill even more than other x2 's I have.

Originally Posted by Tritium

The X-Series software handles hills differently than the i and e-series do.
What you describe sounds normal for an X2

Sent from my Nexus 6 using Tapatalk

[KSagal]

Originally Posted by terryp

Gen. 1 machines didn't limit downhill speed - except on a full charge, but my i2 does exactly the same thing you describe on any reasonably steep downhill.

I had thought the latest software updated had gen 1 units somewhat limited downhill, but surely the older ones did not.

I recall a conversation with Doug Field about this from 2004.

[Jendrik]

The I2 and X2 have different software. You can check this when mounting X2-tires on a I2 base. It behaves like an I2 and really bitchy. I tried it and love my X2 software with X2 tires.

[GlideGuy]

Originally Posted by Jendrik

The I2 and X2 have different software. You can check this when mounting X2-tires on a I2 base. It behaves like an I2 and really bitchy. I tried it and love my X2 software with X2 tires.

Interesting...I've done this many times...rode on soft terrain, paved terrain, up /down steep hills, etc...and have never observed any bitchiness out of my i2 wearing x2 rubber.