Page 26 - TBIS_15194-2019_(EN)_3nd
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TBIS 15194:2019
technology used; for example:
— pedal backwards and check the no load current point (see 3.48);
or
— pedal backwards and check that no torque is delivered on the driving wheel.
For the test, the worst case conditions of gear ratio and speed shall be applied. The
worst condition for speed is defined as 90 % of cut off speed (see 3.23).
4.2.13.2.2 Test track
The gradient of the track shall not exceed 0,5 %. If the gradient is less than 0,2 %
carry out all runs in the same direction. If the gradient lies between 0,2 % and 0,5 %
carry out alternate runs in opposite directions.
The surface shall be hard, of concrete or fine asphalt free from loose dirt or gravel.
The minimum coefficient of friction between the dry surface and the bicycle tyre
shall be 0,75.
4.2.13.2.3 Test procedure
a) Pedal backwards and check that no electric motor assistance is provided. The test
to ensure the compliance to this clause shall be adapted to the technology used.
b) Check the cut off distance:
1) pedal so that the EPAC reach 90 % of the cut off speed;
2) stop pedalling without braking;
3) measure the cut off distance;
4) carry out the test three times; the result is the average of this measurement after
rejection of invalid points.
c) If braking device cut-off switches are fitted, actuate each brake device separately
and verify the initiation of the cut off signal while pedalling.
4.2.14 Maximum power measurement
4.2.14.1 Measurement at the engine shaft
The maximum continuous rated power shall be measured according to EN 60034-1
when the motor reaches its thermal equilibrium as specified by the manufacturer.
NOTE Thermal equilibrium: temperatures of motor parts do not vary more than 2K
per hour.
In circumstance where the power is measured directly at the shaft of the electronic
motor, the result of the measurement shall be divided by 1,10 to consider the
measurement uncertainty and then divided by 1,05 to include for example the
transmission losses, unless the real values of these losses are determined.
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