kiox

[fast]

How does the kiox calculate calories .. does it use cadence, power and heart rate? Or none of them?

 

[Stefan Mikes]

It uses the rider's leg power multiplied by ride time and divided by typical human body efficiency. Note: Power is the product of rider's torque and cadence; both torque and cadence sensors are used to determine the cyclist's power input.

Example: Let the average rider's power input be 100 W, and let the ride time be 1 hour. The work done by the rider is 100 Wh. As human body efficiency is estimated to 25%, the human body input will be 400 Wh. Converted to kcal (multiply Wh by 0.86) it will give 400 * 0.86 = 344 kcal.

Your question was related to Kiox but any e-bike computer/controller or display (such as Specialized TCU controller) capable to calculate rider's kilocalories works on the principle I gave. (Heart rate is not taken into account).

 

[fooferdoggie]

It uses the rider's leg power multiplied by ride time and divided by typical human body efficiency. Note: Power is the product of rider's torque and cadence; both torque and cadence sensors are used to determine the cyclist's power input.

Example: Let the average rider's power input be 100 W, and let the ride time be 1 hour. The work done by the rider is 100 Wh. As human body efficiency is estimated to 25%, the human body input will be 400 Wh. Converted to kcal (multiply Wh by 0.86) it will give 400 * 0.86 = 344 kcal.

Your question was related to Kiox but any e-bike computer/controller or display (such as Specialized TCU controller) capable to calculate rider's kilocalories works on the principle I gave. (Heart rate is not taken into account).

so it does not use heart rate at all or we don't know? it is usually about 50 calories lower then my garmin. the garmin has everything too but the power output.

 

[fast]

It uses the rider's leg power multiplied by ride time and divided by typical human body efficiency. Note: Power is the product of rider's torque and cadence; both torque and cadence sensors are used to determine the cyclist's power input.

Example: Let the average rider's power input be 100 W, and let the ride time be 1 hour. The work done by the rider is 100 Wh. As human body efficiency is estimated to 25%, the human body input will be 400 Wh. Converted to kcal (multiply Wh by 0.86) it will give 400 * 0.86 = 344 kcal.

Your question was related to Kiox but any e-bike computer/controller or display (such as Specialized TCU controller) capable to calculate rider's kilocalories works on the principle I gave. (Heart rate is not taken into account).

Thank you

 

[Stefan Mikes]

so it does not use heart rate at all or we don't know? it is usually about 50 calories lower then my garmin. the garmin has everything too but the power output.

The Specialized TCU gives kilocalories without heart rate strap connected. I can bet the same is with Kiox.
@Alaskan uses even more advanced Nyon display and might want to contribute to this thread.

Here, the data from Specialized TCU controller had been transferred by Bluetooth to the BLEvo app, which in turn fed Strava with real ride data. (The human body efficiency used here might be different than 25%).

 

[fooferdoggie]

but I wonder if it makes it more accurate? no real way to know.

 

[Stefan Mikes]

but I wonder if it makes it more accurate? no real way to know.

Well. I have checked my morning grocery-shopping ride. TCD-W display of my Vado gave 108 kcal while Blevo calculated 123 kcal. I would rather have trusted the Vado display.
However, the question was how Bosch e-bikes calculated calories burnt. The answer was given Figures accurate or not but the way of calculating it by e-bike is quite similar to "pedal power meters" found in the market (only mid-drive motor e-bike has such input data readily available).