Request for Bosch tech info

[SRS]

Appreciate that technical information is no longer allowed but thought I would try my luck.

With reference the the Bosch centre drive system, shortly to arrive on my new KTM.

As I understand, the maximum speed of the system is determined by encoder pulse rate from the back wheel. Correct?

On old models, the encoder could be moved to reflect crank speed. Thereby speeding up the system. I am told that the software will no longer allow this.

Any reason why a PIC or similar could not be programmed to take in rotational pulses and output a scaled or algorithm based version?

Sounds feasible to me. Any thoughts? Also anyone have wiring, pinout details of this sensor.
I assume that is a plug in version.

 

[Deleted member 4366]

Your quite correct. You'd lose the odo and speedometer though. I would think that any circuit that can pulse a small coil would work as long as the pulse is less than 3 Hz and more than 1 Hz.

 

[eddieo]

I was going to say: there is a dongle available from Germany that plugs into motor and derestricts. in fact Hugh posted on this very same today, perhaps not techy enough for you.....and obviously your warranty flys out the window

 

[Martin@e-bikeshop]

Appreciate that technical information is no longer allowed but thought I would try my luck.

With reference the the Bosch centre drive system, shortly to arrive on my new KTM.

As I understand, the maximum speed of the system is determined by encoder pulse rate from the back wheel. Correct?

On old models, the encoder could be moved to reflect crank speed. Thereby speeding up the system. I am told that the software will no longer allow this.

Any reason why a PIC or similar could not be programmed to take in rotational pulses and output a scaled or algorithm based version?

Sounds feasible to me. Any thoughts? Also anyone have wiring, pinout details of this sensor.
I assume that is a plug in version.

Hello SRS,

This gadget will plug and un-plug once installed and should do the same as what your trying..

1A Tuning mit Dongle für 26 Zoll Bosch E-Bikes
(Use Google translate)

Could maybe pinch ideas from it?
Hoping to have stock in March.

Martin

 

[SRS]

Your quite correct. You'd lose the odo and speedometer though. I would think that any circuit that can pulse a small coil would work as long as the pulse is less than 3 Hz and more than 1 Hz.

d8veh

Thanks, had not thought of pulsing the sensor but good way to keep the warranty.
I shall jig up this option 1st for initial trials.

Martins dongle looks interesting but as stated would invalidate the warranty.
Does however give one the option to unplug when legality is required.

Many thanks for the replies, bike arrives, hopefully 3rd week of January and will keep posted as to my prototype attempts and final solution.

 

[eddieo]

SRS which bike did you order?

 

[BAH48]

I seem to remember reading somewhere that the dongle won't work on the new 2013 bikes - different software that has reduced the power somewhat. Have I got that right?

 

[Jez]

I think the software was updated early part of 2012, I have a 2012 Haibike and run the SDX2 dongle and it works just fine....in fact it's amazing! On the later bikes the software has to sense that the bike accelerating from a lower speed, my speedo reads normal until it reaches 20kph then the reading is halfed thus fooling the software. Don't waste time and money trying different ways to cheat the software, just buy the dongle, fit and enjoy. I got mine straight from the makers, emailed them on a Thursday, paid for it with Paypal on the Friday and it arrived on the Monday....and I fitted it the same day.
Jez.
Want more info? PM me.

 

[Fordulike]

Hello SRS,

This gadget will plug and un-plug once installed and should do the same as what your trying..

1A Tuning mit Dongle für 26 Zoll Bosch E-Bikes
(Use Google translate)

Could maybe pinch ideas from it?
Hoping to have stock in March.

Martin

Is it just me, or does it look like that dongle does nothing more than short out 2 wires in the controller, when the headphone connector is plugged in

Maybe the plug contains a resistor, like those dodgy add on units you can buy for your car to improve fuel economy.

Pay 100 quid to do that... Mmmmmmmmm

 

[Jez]

The dongle is made with micro circuitry by a German company that specialize in manufacturing for the music industry. It can't be just shorting out two wires as they make two versions, one for 26" wheels and one for 700c/29" wheels.
Jez.

 

[Fordulike]

The dongle is made with micro circuitry by a German company that specialize in manufacturing for the music industry. It can't be just shorting out two wires as they make two versions, one for 26" wheels and one for 700c/29" wheels.
Jez.

Two different resistors

Pop their website link on here and we'll have a look.

 

[Jez]

The company website is MTC maintronic GmbH - Homepage
contact Sandra at SMueller@maintronic.de
Jez.

 

[Fordulike]

The company website is MTC maintronic GmbH - Homepage
contact Sandra at SMueller@maintronic.de
Jez.

Thanks Jez. Not trying to yank yer chain, but I'm usually pretty sceptical when it comes to stuff like this.
Especially at that price

Edit: Arrrrrrrrr, the link you provided actually shows an extra dongley thing, compared to the original link.
Maybe I was wrong

 

[Jez]

No probs....I ummed and arghed and thougth I could cheat the software, bought the dongle in the end and IMHO it's worth it....
Jez.

 

[eddieo]

No probs....I ummed and arghed and thougth I could cheat the software, bought the dongle in the end and IMHO it's worth it....
Jez.

Thanks Jez for the info!

the link to Hughs dongle shows installation and seems you have to remove crank and spider etc... Once its installed how do you disable it for normal running?

 

[Hugh]

You can do it by connecting the dongle into the sensor cable where it emerges from the motor cover by the back wheel, but IMHO it a) exposes the dongle to all the crap thrown up by the back wheel and b) requires some fairly unsightly work with tape or something to hold it all in place.

I did mine by removing the motor cover and connecting to the sensor wire inside the cover. I then ran the dongle lead over the motor and allowed it to exit the cover through an existing gap on its upper part. I then drilled a couple of small holes in the cover and tied the dongle down to the top of it using cable ties, which means a) it's dead easy to unplug the dongle from its socket, and b) the whole thing is protected from flying mud etc by 2 frame tubes. I used some non-adhesive, self-sealing rubber tape (that's apparently used by phone engineers) to seal up the connections into the sensor wire, the holes I drilled in the cover, and to cover the dongle itself. It's actually quite unobtrusive because of being all black against the black cover.

It means you have to cut the cable ties if you want to remove the motor cover, but hey, into every life a little rain must fall

I tried to take some photos on my phone while doing it - they aren't much cop but I've attached them for what it's worth.

View attachment 4798View attachment 4799View attachment 4800

The tape is called Powerlink Plus high voltage self-fusing rubber tape, code no. SH50107SAT