One embodiment relates to a hybrid vehicle drive system for a vehicle including a first prime mover, a first prime mover driven transmission, a rechargeable power source, and a PTO. The hybrid vehicle drive system can include a control system for reducing or eliminating regenerative braking during a traction control or anti-lock braking event.

Methods and systems are provided for controlling and diagnosing a mechanical vehicle component. In one example, a method may include determining a vehicle speed and a plurality of clutch position settings at a diagnostic controller, and identifying unauthorized conditions based on these determinations. Further, the diagnostic controller may trigger an active fault state of the mechanical vehicle component in order to avoid unauthorized conditions that may lead to unwanted or unanticipated changes in vehicle motion.

A vehicle includes an electric machine and a controller. The controller is programmed to responsive to a threshold difference, indicative of wheel slip, between average wheel speed and a vehicle speed that is based on a difference between wheel acceleration and measured vehicle acceleration, command a speed to the electric machine to reduce the wheel slip.

A traction control device and method for a four-wheel drive electric vehicle are disclosed. When the drive wheels of an electric vehicle spin, a drive force of the electric vehicle is controlled so as to restrain the spinning of the drive wheels and to secure the starting performance and acceleration performance of the electric vehicle.

A hybrid-drive motorcycle comprising an endothermic engine, a rear wheel connected to a carrier structure through a swingarm, a gearbox connected to the endothermic engine through a primary transmission and to the rear wheel through a secondary transmission, and a reversible electric machine, wherein an auxiliary transmission connects the electric machine to an input shaft of the secondary transmission, and wherein the electric machine is mounted on the carrier structure below the swingarm.

A system of an electric vehicle configured to compensate for spin of the electric vehicle that results from slipping of one or more wheels. A controller detects when one or more wheels are slipping and/or a spin (e.g., rotation) of the electric vehicle that results from a torsion force as a result of the slipping. The controller instructs the steering system to orient one or more of the wheels that are not slipping in a direction opposite the direction of rotation to attempt to reduce or eliminate rotation of the electric vehicle and/or to maintain the present direction of travel.

An off-road vehicle includes a driveline, a control system, and a braking system. The driveline provides driveline power and driveline brake power to a first tractive assembly and/or a second tractive assembly. The control system stores vehicle information, determines driving instructions based on environment data, and determines speed references for tractive elements of the first and second tractive assemblies based on the driving instructions and the vehicle information. The braking system includes brakes and a braking subsystem. The brake subsystem operates the brakes to provide brake power to one or more components of the first and/or second tractive assemblies. The brake controller controls the brakes to selectively provide the brake power and the control system controls the driveline to selectively provide the driveline power and the driveline brake power based on current speeds of the tractive elements and the speed references to accommodate the driving instructions.

A method of determining a traveling state of a vehicle, such as passing over a speed bump, occurrence of wheel slip, or traveling on a slope, is determined in real time to prevent degradations in wheel slip control performance and to avoid unnecessarily malfunctions in a traction control system without compromise of wheel slip control performance. The method includes steps of: determining a torque command of a drive unit to apply torque to a drive wheel in accordance with vehicle driving information collected during traveling of the vehicle; determining an acceleration error in accordance with the determined torque command and information regarding a measured longitudinal acceleration of the vehicle measured by a first sensor; determining an acceleration disturbance rate in accordance with the determined torque command; and determining a current traveling state of the vehicle in accordance with the determined acceleration error and the determined acceleration disturbance rate.

A vehicle control device includes a driving force setting unit and a motor controller. The driving force setting unit sets a first requested driving force on the basis of accelerator opening and makes dulling processing on it to set a second requested driving force. The motor controller controls a motor driving force on the basis of the second requested driving force. The motor controller executes a slip control on the condition that the driving wheel slips on accelerated travel. The slip control includes controlling the motor driving force on the basis of a limited driving force smaller than the second requested driving force. In stopping the slip control, the motor controller compares the first requested driving force and the motor driving force. On the condition that the former is smaller than the latter, the motor controller controls the motor driving force on the basis of the first requested driving force.

A vehicle includes a drive source that supplies a driving force to a drive wheel, a switch, and a controller that puts a first limitation on the driving force or puts a second limitation on the driving force when the switch is operated, the second limitation being smaller than the first limitation.