Embodiments of the present disclosure include a wheelchair configured to reposition an occupant between a lowered and a raised position. The wheelchair can include a frame, a seat moveable relative to the frame, a drive wheel, and one or more pairs of arm assemblies. The arm assembly includes a wheel configured to move from a first spatial location when the wheel chair is operating on flat, level ground to a second spatial location that is different than the first spatial location. Arm limiters that can selectively engage the arm assembly dependent on the position of the arm assembly and surface conditions of ground and can limit the range of motion of the arm assembly and sometimes other operational aspects of the chair.

A vehicle drive control apparatus includes: an object detection unit which detects positions, speeds, and sizes of objects around an own vehicle; and a speed control unit which detects a moving object existing in a place adjacent to a scheduled travelling path of the own vehicle and a speed change induction obstacle inducing a future speed vector change of the moving object from the objects detected by the object detection unit and changes a speed of the own vehicle, on the basis of a relative position relation of the own vehicle and the detected moving object and the speed change induction obstacle.

A work vehicle includes a travelling state determination unit capable of determining a travelling state of a travelling body, and a control unit that restricts, if it has been determined by the travelling state determination unit that the travelling body is in a reverse travelling state, an upper limit value of a target rotational speed of an engine that is based on an operation on an accelerator operation tool to be a lower value than in a case where it has been determined by the travelling state determination unit that the travelling body is in a forward travelling state.

A track for a track vehicle has sensor-receiving cavities disposed therein. Removeable sensors are placed in the sensor-receiving cavities for sensing characteristics of the track during operation.

A system and method for encouraging a user of a recreational vehicle to wear safety equipment is described. The helmet contains a microprocessor and sensors to determine if the helmet is worn. The helmet communicates with the vehicle and the vehicle either disables operation or allows limited operation if the helmet is not worn. On motorized vehicles, the motor operation is restricted. On human powered vehicles mechanical resistance may limit operation.

An occupant protection auxiliary device includes: a seat mounted on a vehicle and on which an occupant is able to sit while facing a rear of the vehicle; a head detection sensor able to detect a relative position of a head of the occupant with respect to a headrest of the seat; and a control unit that determines whether to execute at least one of alerting the occupant, setting a speed limit, and changing a reclining angle based on a detection result of the head detection sensor.

Disclosed is a speed control system for a curved road section, which includes: a wireless communication module that supports communication with road-side units and receives road information from the road-side units for a plurality of points on a curved road adjacent to the road-side units; an allowable speed calculation unit that calculates maximum allowable speeds that are the highest speeds at which a vehicle is driven, for the plurality of points, using the road information; an optimum speed calculation unit that calculates an optimum speed in an acceleration and deceleration range that is set in consideration of a predetermined acceleration and deceleration limit of the vehicle; and a control module that displays the optimum speed calculated by the optimum speed calculation unit to the outside, or provides the calculated optimum speed to another control system in the vehicle such that the speed of the vehicle is controlled.

In at least some implementations, a method for controlling energy use in a vehicle includes determining a travel path for a trip, determining a duration of travel for the trip, determining an energy requirement to complete the trip within the duration, comparing the energy requirement to a low energy threshold, and reducing the maximum energy output that is provided from the vehicle when the energy requirement is lower than the low energy threshold.

A control unit arranged to monitor a load distribution of a vehicle when the vehicle is in motion, the control unit comprising an interface arranged to receive a plurality of load values associated with one or more vehicle axles and/or one or more vehicle wheels from a plurality of load sensors arranged on the vehicle, wherein the control unit is arranged to determine a vehicle load distribution based on the plurality of load values, to compare the determined vehicle load distribution to a pre-determined allowable vehicle load distribution, and to trigger an emergency procedure in case the determined vehicle load distribution differs from the pre-determined vehicle load distribution by more than an allowable amount.

A method of replacing a sensor in a track assembly for a track vehicle includes detecting, with a sensor problem detector, a problem related to a first sensor, and replacing, based on the detected problem, the first sensor with a second sensor by inserting the second sensor in a sensor cavity of a continuous belt of the track assembly in which the first sensor was disposed.