公开(公告)号：US20190300105A1

公开(公告)日：2019-10-03

申请号：US15938057

申请日：2018-03-28

Applicant: GM Global Technology Operations LLC

Inventor： Shaun S. Marshall ,  Mark A Manickaraj ,  Andrew M. Zettel ,  Prakash Murugesan

IPC: B62M6/50 ,  G01C21/34 ,  B62M6/90 ,  B62M6/55 ,  B62J99/00

Abstract: A pedal electric cycle (e-bike) includes a road wheel connected to a frame, a crankset imparting a rider torque to the road wheel when a rider manually rotates the crankset, a battery pack having a state of charge (SOC), an electric traction motor, and a controller. In response to motor control signals, the motor imparts an electric-assist (e-assist) torque to the road wheel as a torque multiplier. The controller uses an energy cost function, and in response to input signals including a travel route and a desired e-assist objective, commands the e-assist torque via the motor control signals to augment the rider torque while satisfying the e-assist objective. The level is determined via the energy cost function, with the input signals including the SOC, inclination data describing a grade of each road segment of the route, and an electric model providing the torque multiplier.