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.

The present application discloses an all-terrain vehicle and a method for powering the all-terrain vehicle. The all-terrain vehicle includes: a frame; at least one seat arranged on the frame; a first device; a second device being a micro-control unit, a required electric power of the first device being greater than a required electric power of the second device, and the first device having a lower stability requirement for a power supply voltage than the second device; and a power supply system arranged behind the at least one seat and comprising a first power source and a second power source. The first power source is configured to supply power to a first device. The second power source is configured to supply power to a second device of the all-terrain vehicle.

A method and system for estimating surface roughness of a ground for an off-road vehicle to control an implement comprises detecting motion data of an off-road vehicle traversing a field or work site during a sampling interval. A first sensor is adapted to detect pitch data of the off-road vehicle for the sampling interval to obtain a pitch acceleration. A second sensor is adapted to detect roll data of the off-road vehicle for the sampling interval to obtain a roll acceleration. An electronic data processor or surface roughness index module determines or estimates a surface roughness index based on the detected motion data, pitch data and roll data for the sampling interval. The surface roughness index can be displayed on the graphical display to a user or operator of the vehicle.

A vehicle includes a wireless transceiver configured to receive sampled data from a vehicle assistance device, the sampled data being from a plurality of sampling locations by the vehicle assistance device; and a controller programmed to generate a driving path using the plurality of sampling locations, and responsive to arriving at one of the sampling locations, adjust a vehicle setting using the sampled data corresponding to the one of the sampling locations.

A hybrid power system includes: an engine; a continuously variable transmission, power being transferred between the continuously variable transmission and the engine; a first transmission, power being transferred between the first transmission and the continuously variable transmission; a first main decelerator, power being transferred between the first main decelerator and the first transmission; a first half shaft, power being transferred between the first half shaft the first main decelerator; a motor; a second transmission, power being transferred between the second transmission and the motor; a second main decelerator, power being transferred between the second main decelerator and the second transmission; and a second half shaft, power being transferred between the second half shaft and the second main decelerator, one of the first half shaft and the second half shaft being a front half shaft, and the other thereof being a rear half shaft.

An offroad travel assistance system for a user vehicle includes one or more processors and a memory communicably coupled to the one or more processors and storing a user vehicle configuration evaluation module including computer-readable instructions that when executed by the one or more processors cause the one or more processors to determine if user vehicle configuration information describing the user vehicle is consistent with ride information similar to the user vehicle configuration information and describing a traversal of an offroad trail by a reference vehicle and, responsive to a determination that the user vehicle configuration information is not consistent with the ride information, autonomously control at least one portion of the user vehicle so as to prevent operation of the user vehicle to traverse the offroad trail.

A method for controlling an engine clutch of an electrified vehicle is provided to easily engage and disengage an engine clutch by applying a launch engagement control method that utilizes power from both of an engine and a motor in accordance with the variation of the number of revolutions per hour of the engine and the usage rate of electrical energy by a motor to engage the engine clutch in a terrain mode and by applying a control method that disengages an engine clutch early in accordance with the number of revolutions per hour of the engine and the shaft torque of the engine clutch in the terrain mode.

An offroad travel assistance system for a user vehicle includes one or more processors and a memory communicably coupled to the one or more processors and storing a user vehicle configuration evaluation module including computer-readable instructions that when executed by the one or more processors cause the one or more processors to determine if user vehicle configuration information describing the user vehicle is consistent with ride information similar to the user vehicle configuration information and describing a traversal of an offroad trail by a reference vehicle and, responsive to a determination that the user vehicle configuration information is not consistent with the ride information, autonomously control at least one portion of the user vehicle so as to prevent operation of the user vehicle to traverse the offroad trail.

A utility vehicle includes: a plurality of wheels mounted with low-pressure tires; an output operating element that is operated by a driver and receives an increase/decrease instruction to increase or decrease a driving force; a switching operating element that receives a switching instruction for switching between travel modes; and a controller. The controller has a manual travel mode in which the driving force is controlled in accordance with an amount of operation on the output operating element, and a control travel mode in which the driving force is controlled so as to maintain a travel speed at a target speed that is set within a predetermined speed range, the control travel mode being executed in response to an input on the switching operating element.

A method and system for estimating surface roughness of a ground for an off-road vehicle to control ground speed comprises detecting motion data of an off-road vehicle traversing a field or work site during a sampling interval. A pitch sensor is adapted to detect pitch data of the off-road vehicle for the sampling interval to obtain a pitch acceleration. A roll sensor is adapted to detect roll data of the off-road vehicle for the sampling interval to obtain a roll acceleration. An electronic data processor or surface roughness index module determines or estimates a surface roughness index based on the detected motion data, pitch data and roll data for the sampling interval. The surface roughness index can be displayed on the graphical display to a user or operator of the vehicle, or applied to control or execute a ground speed setting of the vehicle.