26 VI User Manual | Impulse Ergo Pedelec• The level of assistance you have selected.In the power-assist mode POWER, the motorassists you with the highest output and thereforealso uses the most energy. If you ride in the SPORTmode, the motor produces slightly less power.If you have selected ECO, you receive the leastamount of assistance but have the battery’s maxi-mum range at your disposal.• How fast you ride.When you set off on your Pedelec, the assistanceincreases as you build up speed until it reaches itsmaximum, just before the highest assisted speed isachieved. The assistance then reduces automatical-ly and switches off at roughly 25 km/h, irrespectiveof the gear you are in. Depending on the power-as-sist mode you are riding in, the transition betweenriding with and without power assist may seemmore or less abrupt. This applies for the three high-est gears. In all other gears, the motor switches offearlier, depending on the gear ratio. ➠ Chapter 3“Special features of the Pedelec with Impulse drive”contains a table which shows the speeds at whichthe motor is switched off.7 Assistance by the electric motor7.1 Operating principle of assistanceIf you switch on the assistance and start pedalling, themotor starts as soon as the rear wheel is turning.The thrust delivered by the motor depends on three fac-tors:• Your own pedalling effort.The motor adapts to the force you apply. If youpedal harder, e.g. uphill or when setting off, thepower sensor detects this and delivers more powerthan if you were only pedalling gently. The assis-tance increases proportionally if you pedal harder.This increase is more pronounced in the POWERmode than in the SPORT and ECO modes. Thethrust is limited by the maximum motor output.Pedalling torquePOWERHIGHSPORTMIDDLEECOLOWSTANDBYPower assistotherPedelec driveAssistance provided by the Impulse motor comparisonPropulsive powerSpeedPedal forceMax. assistance Switch-off speedPropulsive power (pedal force +electrical assistance)Electrical assistanceImpulse Increasing pedalpower andassistanceReducingassistanceAssistanceswitched offRelationship between pedal force and electrical assistance
