This application discloses a vehicle, a ramp auxiliary system of the vehicle and a control method thereof. The vehicle is driven by a rim motor. The method includes: acquiring current state information of the vehicle; determining whether the ramp auxiliary system meets preset activation conditions or not according to the current state information, wherein the preset activation conditions are used for activating the ramp auxiliary system; activating the ramp auxiliary system if the ramp auxiliary system meets the preset activation conditions; determining whether to control the vehicle to be in a torque keeping mode or not according to the current state information, wherein torque for driving the vehicle is kept unchanged in the torque keeping mode; and when the vehicle is in the torque keeping mode, driving the vehicle according to the preset torque to prevent the vehicle from slipping.

When a stepping amount of an accelerator pedal is 0%, torque Ta is generated with the rotating speed being zero. When retreat is occurred in the slope start, the rotating speed is reduced. When the rotating speed is reduced, the torque is increased. Thus, the retreating force finally matches the propulsion force. As a result, the retreat becomes uniform motion. The decision of torque in such a manner does not require a value of a vehicle weight.

A vehicle braking system includes one or more traction motors and an electrical device configured to be electrically coupled with the one or more traction motors. The one or more traction motors are configured to propel a vehicle and to generate electric power during rollback of the vehicle down a grade. The electrical device is configured to consume the electric power generated from the rollback of the vehicle by performing work with the electric power during the rollback of the vehicle.

A control method for an electric vehicle controls braking force when the accelerator operation amount is less than a prescribed value and controls drive force when the accelerator operation amount is at least a prescribed value. The electric vehicle control method estimates disturbance torque that acts on the motor as a resistance component relating to gradient; and executes correction whereby the braking force or the drive force is increased/decreased on the basis of the disturbance torque estimated value, such that the resistance component is negated. A determination is made regarding whether or not the accelerator operation amount is a partial equivalent amount and, if at least either the accelerator operation amount on a downhill road is greater than the partial equivalent amount or the accelerator operation amount on an uphill road is less than the partial equivalent amount, the correction amount is reduced.

A method for controlling a vehicle that includes a motor configured to provide a driving/braking force to the vehicle and a friction braking mechanism configured to provide a friction brake force to the vehicle includes a target calculation step of calculating a target torque of the motor in accordance with a displacement of an accelerator pedal, a gradient estimation step of estimating a gradient torque to cancel a disturbance due to a gradient of a road surface where the vehicle is travelling, a command calculation step of calculating a torque command value of the motor based on the gradient torque and the target torque, a control step of controlling a torque of the motor in accordance with the torque command value, and a stop control step.

Systems and methods provide accurate determinations of relevant vehicle mass that can take into account any load being carried and/or towed by a vehicle, such as an electric vehicle or hybrid vehicle. Systems and methods also provide accurate road load measurements that can take into account road gradient(s) and the impact of gravity. Accordingly, the dynamic nature of relevant vehicle mass and road load can be captured. Efforts to optimize operation and/or take preemptive action to provide more efficient performance, enhance the drive experience, etc. can be better achieved through the more accurate determinations of relevant vehicle mass and road load achieved by these systems and methods.

A method for operating an electric bike includes a braking system and a drive unit which is actuable in a controlled manner, with the braking system including an actuator which is actuable in a controlled manner for generating a braking torque in a controlled manner. The method includes generating a braking torque in a controlled manner by way of the braking system and generating a driving torque in a controlled manner by way of the drive unit. The generation of the braking torque in a controlled manner and the generation of the driving torque in a controlled manner are performed simultaneously and depending on one another in order to decelerate the electric bike at a predetermined total braking torque, or to accelerate at a predetermined total driving torque.

A control device and a transmission system are configured to improve riding comfort of a human-powered vehicle. The control device includes an electronic controller that is configured to control a transmission device of a human-powered vehicle so that a transmission ratio at which the vehicle is started becomes equal to a designated transmission ratio. The electronic controller is configured to set the designated transmission ratio based on reference information that excludes information related to a gradient of a road surface, information related to manual operation of the transmission device, and information related to propulsion assistance of the human-powered vehicle.

One variation of a system includes a bogie including: a chassis; a first set of latches configured to transiently engage a first subset of engagement features, in a first array of engagement features on a left rail and in a second array of engagement features on a right rail of the trailer, to retain the bogie below a floor of the trailer; a driven axle suspended from the chassis; and a motor coupled to the driven axle and configured to output torque to the driven axle and regeneratively brake the driven axle. The system further includes a battery assembly: including a second set of latches configured to transiently engage a second subset of engagement features, in the first array of engagement features and in the second array of engagement features, to retain the battery assembly adjacent the bogie; and configured to receive electrical energy from the motor.

System and method configured to determine a direction of movement of a vehicle in response to a brake being released or in response to initiating movement of the vehicle from a stopped position along a route. The direction of movement is determined based on a selected travel direction of the vehicle, a grade of the route, and at least one of applied tractive efforts or applied braking efforts.