When Bosch got down to redesign the Efficiency Line CX motor, they selected to maintain the essential efficiency parameters the identical: The motor nonetheless produces a most of 600W and as much as 85Nm of torque, making for a 340 p.c help. The query, after all, is why Bosch didn’t enhance the quantity of help. In Bosch’s view, the Efficiency Line CX already supplied the proper stability of energy, rideability, effectivity relative to battery vary and drivetrain sturdiness. Extra energy would imply larger weight, making the eMTB heavier and fewer nimble; it will additionally lead to a lower in vary due to extra weight and drawing extra energy for the motor, in addition to extra put on and tear on drivetrain elements.
So what adjustments? Properly the primary notable distinction is that the brand new motor is 100g (3.5 oz.). The brand new motor additionally supplies larger thermal stability; historically as a motor heats up, energy manufacturing is decreased by the controller to stop the motor from overheating. Whereas the earlier Efficiency Line CX supplied larger thermal stability than its opponents, the brand new motor reveals much more constant efficiency on lengthy rides.
Bosch redesigned the completely different sensors to make it much more conscious of rider enter. It options new torque and cadence sensors, in addition to the addition of inertial sensors. The inertial sensors measure acceleration in three axes in addition to rotation in three axes—six sensors complete and what this does is present the controller a way of the place the eMTB is in area—how it’s transferring. The motor can now reply in refined methods based mostly on whether or not the rider is climbing, descending, driving on clean floor or rolling by means of a rock backyard or over roots.
Bosch has reduce the quantity of noise the motor produces, significantly the upper frequency sounds that are usually probably the most noticeable a part of the sound a motor generates.
The Efficiency Line CX now provides a sensible stroll help; with the press of a button, the rider receives simply sufficient energy to stroll up grades too steep to experience, however because of the inertial sensors, it tailors the pace of the stroll help based mostly on the grade and the way clean or bumpy the bottom is. They’ve additionally added a hill maintain characteristic, which can present simply sufficient energy to maintain the eMTB in place for 10 seconds after releasing the stroll help button. Moreover, they’ve added hill begin help for when the path is so steep that it’s onerous to generate sufficient pace and stability with the intention to transfer the foot that’s on the bottom to the pedal. Hill begin help supplies an additional burst of energy in order that the rider can stand up to a balancing pace and land their foot on the pedal.
Prolonged increase options new software program that reads how rapidly or slowly the rider is pedaling and that informs how lengthy the increase is—the slower every pedal stroke, the longer the increase.
