Abstract: A system for managing power of an aerial vehicle, the system including an aerial vehicle including a power storage module and at least one component, a computing device communicatively coupled to the aerial vehicle, the computing device including a processor and a memory storing instructions which, when executed by the processor, cause the computing device to receive data indicating a state of charge of the power storage module, receive data indicating a rate of power consumption of the at least one component, generate, based on at least one of the state of charge of the power storage module or the rate of power consumption of the at least one component, a power command, and transmit the power command to the aerial vehicle.

Abstract: When ignition is on, a shift position is a neutral position, and shut-down of the inverter is cancelled in a state that a short circuit fault occurs in any phase among multiple phases of the inverter, the electrically driven vehicle performs a first ON control to turn on upper and lower arms in any arbitrary phase among the multiple phases. When an abnormality is detected in the inverter due to the first ON control, the electrically driven vehicle performs a second ON control to turn on upper and lower arms in a different phase from the phase of the first ON control.

Abstract: An in-vehicle installation structure for an electric device installed in a front compartment of a vehicle includes: a structure disposed in a front compartment of a vehicle; an electric device fixed to an upper portion of the structure; a connector connected to a rear upper portion of the electric device; and a protector extending upward from the electric device, the protector being disposed behind the connector of the electric device.

Abstract: This invention is a convenient system to charge an electric vehicle, or a hybrid vehicle, during its travel on a road. What sets this invention apart, is that the electric charging is done during normal driving on a special road. It is a convenient, automatic charge method, wherein the driver does nothing except driving. Many types of electric vehicles can be charged automatically, with the charging fee being done automatically, by a license plate scanner.

Abstract: Provided are a regenerative braking method and device for a transportation device. A regenerative braking method through adaptation to a driving habit includes accumulating a deceleration level of a driver, determining a regenerative braking level based on the accumulated deceleration level, and controlling a torque of a motor based on the regenerative braking level.

Abstract: A system and method of applying a coast regeneration torque of a vehicle are provided. The method corrects a magnitude of slip (or a slip ratio) which is considered when a coast regeneration torque is to be variably controlled while the vehicle is coasting.

Abstract: A braking control system and a method for an eco-friendly vehicle are provided to resolve discrepancy in braking force occurring during switching between hydraulic braking and regenerative braking. The system includes a deceleration determiner that determines target and actual decelerations of the vehicle based on collected information when braking and a torque calculator that calculates target and actual deceleration torques from the determined target and actual decelerations of the vehicle using vehicle equivalent inertia information. An error calculator calculates a torque error and a torque corrector corrects a pre-correction target regenerative braking torque by the calculated torque error and calculates a post-correction target regenerative braking torque. A motor controller adjusts a regenerative braking torque of a motor according to the calculated post-correction target regenerative braking torque.

Abstract: Provided is a brake control device (25) for controlling a regenerative brake (9) and a friction brake (11) mounted on a vehicle (1). The brake control device includes a vehicle speed sensor (21), a target deceleration determining unit (32), a target brake torque determining unit (34), a target friction torque determining unit (35), a friction brake command unit (36), a target speed determining unit (37), a feedback computation unit (38) configured to determine a feedback value according to a deviation of the vehicle speed from the target vehicle speed, a regenerative torque determining unit (39), and a regenerative brake command unit (40).

Abstract: The invention relates to a method for controlling a braking system for setting a total braking torque distribution between a first and a second axle of a motor vehicle. The braking system includes a friction braking device and a recuperative braking device. The braking system has a total braking torque composed of a friction braking torque portion and a recuperative braking torque portion. The method include determining, for one axle, a minimal recuperation torque, which is set on that axle, and remains set on that axle for all driving situations as a recuperative braking torque portion.

Abstract: A vehicle braking device sets a target hydraulic braking force based on the difference between the execution regeneration braking force, which is actually generated regeneration braking force and the requested braking force which is to be applied to the vehicle wheels and includes a hydraulic pressure control portion that raises the target hydraulic braking force by a predetermined value at a timing when the difference between the execution regeneration braking force and the maximum value thereof is equal to or less than a judgement threshold value and a threshold value setting portion that sets the judgement threshold value on the basis of the requested braking force gradient when the liquid amount inside the hydraulic chamber is less than a predetermined amount, and sets the judgement threshold value on the basis of the target hydraulic braking force gradient when the liquid amount is equal to or more than the predetermined amount.

Abstract: A traveling energy distribution system includes a plurality of supply facilities each of which is able to supply traveling energy to a vehicle, an information acquisition unit configured to acquire, from a vehicle, vehicle information relevant to an amount of traveling energy remaining in the vehicle and acquire, from each of the plurality of supply facilities, supply facility information relevant to an amount of traveling energy that can be supplied from that supply facility, and a determination unit configured to determine a transfer source supply facility and a transfer destination supply facility for traveling energy to be transferred from among the plurality of supply facilities and determine an amount of the traveling energy to be transferred based on the vehicle information and the supply facility information acquired by the information acquisition unit.

Abstract: Systems and methods for managing power of an aerial vehicle, an illustrative system including an aerial vehicle including a power storage module and at least one component, and a computing device communicatively coupled to the aerial vehicle, the computing device including a processor and a memory storing instructions which, when executed by the processor, cause the computing device to receive data indicating a state of charge of the power storage module, receive data indicating a rate of power consumption of the at least one component, generate, based on at least one of the state of charge of the power storage module or the rate of power consumption of the at least one component, a power command to switch the at least one component to a power-saving state, and transmit the power command to the aerial vehicle.

Abstract: A vehicle control apparatus includes: an oil temperature sensor in the oil; a motor temperature sensor at a position higher than that of an oil level of the oil; a common temperature sensor disposed at a position in the oil when a driving state of the vehicle is a first driving state and disposed at a position higher than that of the oil level when the driving state of the vehicle is a second driving state; a state determination unit configured to determine whether the driving state of the vehicle is either one of the first and second driving states, on the basis of at least a revolution number of the motor; and a malfunction diagnosis unit configured to perform malfunction diagnosis on the basis of output from the common temperature sensor in the first driving state and output from the common temperature sensor in the second driving state.

Abstract: A control device of a vehicle includes a motor temperature acquirer; an oil temperature acquirer; and a torque controller. The motor temperature acquirer acquires a temperature of a motor that drives the vehicle. The oil temperature acquirer acquires a temperature of oil that cools the motor. The torque controller controls a torque of the motor on a basis of the temperature of the motor and the temperature of the oil.

Abstract: Provided is a control apparatus, a control method, and a control system for an electric vehicle that can prevent or reduce an unnecessary torque fluctuation on a wheel not targeted for slip control. A control apparatus for an electric vehicle limits a torque to be output to a non-target wheel according to a torque output to a target wheel after target wheel slip control is started, and updates a limit value of the torque to be output to the non-target wheel when a fluctuation range of the torque output to the target wheel falls within a predetermined range during the limitation.

Abstract: An electric vehicle includes front-wheel electric motor and rear-wheel electric motor driving front and rear wheels, respectively; a control unit controlling driving of those electric motors. Further, one of the electric motors is a permanent-magnet motor and the other is a magnetless motor, a maximum output of the permanent-magnet motor is smaller than a maximum output of the magnetless motor, and the control unit includes: a first drive control unit configured to drive the permanent-magnet motor when vehicle speed is in a first vehicle-speed range; and a second drive control unit configured to drive only the magnetless motor when the vehicle speed is in a second vehicle speed range, vehicle speeds in the second vehicle speed range are greater than vehicle speeds in the first vehicle-speed range.

Abstract: An object is to increase the possibility that an electric vehicle is able to reach an operating charging facility. There is provided an electric vehicle comprising: a motor for driving; a power storage device configured to transmit electric power to and from the motor; and a control device configured to control the motor and to set a first rate to a controlling lower limit rate of the power storage device. When it is expected that the electric vehicle is unable to reach an operating charging facility which is a charging facility in service, with keeping the controlling lower limit rate to the first rate, the control device changes the controlling lower limit rate to a second rate that is lower than the first rate.

Abstract: Provided is an electric vehicle in which impacts on a high-voltage connector from at least one of a dashboard or a cowl member can be suppressed. The electric vehicle includes a case disposed ahead of the dashboard and the cowl member of the vehicle, the case being adapted to house a high-voltage component, a high-voltage connector disposed on the upper face of the case and connected to the high-voltage component; and an auxiliary unit disposed on the upper face of the case. The auxiliary unit is disposed closer to the dashboard than is the high-voltage connector, and is formed of a material with higher rigidity than those of the dashboard and the cowl member.

Abstract: The invention relates to a drive system (10), in particular for a vehicle, comprising a fuel cell unit (12) for generating electric energy, a secondary battery (14) for storing electric energy, an electric machine (20) with windings (21, 22, 23), and an inverter for actuating the electric machine (20). The inverter (30) is designed as a 3-level inverter and has multiple electronic switches (S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12), diodes (D1, D2, D3, D4, D5, D6, X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X12), a plus pole (37), a minus pole (35), and a neutral pole (36). The fuel cell unit (12) and the secondary battery (14) are connected in series and are connected to the poles (35, 36, 37) of the inverter (30).

Abstract: A second communication unit of a power receiving vehicle sends a charging start request signal to a power supplying vehicle located on a planned travel route of the power receiving vehicle. At least one of a first travel control unit of the power supplying vehicle and a second travel control unit of the power receiving vehicle brings the power supplying vehicle and the power receiving vehicle close to each other up to a position that satisfies a charging start condition when the first travel control unit receives the charging start request signal from the power receiving vehicle through a first communication unit of the power supplying vehicle. The remaining charge of a battery of the power receiving vehicle is managed by performing charging between the power supplying vehicle and the power receiving vehicle.

Abstract: A mobile body is driven by power that is wirelessly transferred from a non-contact power supply device including a power transmission resonator that transmits power in accordance with a non-contact power supply method. The mobile body includes; a power reception resonator, a power storage, a motor, a controller, and at least two wheels driven independently of each other by the motor, the at least two wheels including a first movement axis and a second movement axis with an axial orientation different from that of the first movement axis, and moving the mobile body along the first movement axis and the second movement axis. When the mobile body moves to a power supply target range, the controller controls the motor based on power reception status information indicating a status of power reception by the power reception resonator, and moves in a flat plane direction.

Abstract: A modularised charging vehicle, aiming at solving the problem of repeated development caused by the fact that an existing charging vehicle needs to configure separate charging piles for various specifications of electric automobiles. A charging vehicle comprises a main controller and at least two charging and discharging modules, wherein the charging and discharging modules comprise a charging input end, a battery pack, a DC/DC converter and a charging output end. The battery pack is connected to the charging input end and the DC/DC converter. The DC/DC converter is connected to the charging output end. The charging and discharging modules are connected in parallel to each other, and are combined into one path for inputting and are combined into one path for outputting. The controller can control the charging and discharging modules to store and release electric energy, so as to achieve an input or output function of different power.

Abstract: A device is disclosed for charging an electric vehicle. The device includes a plurality of electrical contacts, at least two of them coupled to a power supply, and each electrical contact of the plurality of electrical contacts is arranged for contacting a different contact surface of the electric vehicle. The device also includes a secondary contact forming a contact arrangement with one of the electrical contacts of the plurality of electrical contacts. The electrical contact and the secondary contact of the contact arrangement are arranged to contact the same contact surface of the vehicle.

Abstract: A wireless automatic charging system for electric vehicles is disclosed, wherein the electric vehicle comprises a charging board, a Bluetooth device, a battery, as well as a battery management module electrically connected to the aforementioned charging board, Bluetooth device and battery and capable of detecting and recording the charging efficiency data concerning the charging board, and wherein the wireless automatic charging system for electric vehicles comprises a base seat, an air inflation and deflation device, a discharging board and a control console, wherein the battery management module in the electric vehicle can transfer the charging-related information of the electric vehicle to the control console via the Bluetooth module such, and adjust the distance between the charging board and the discharging board and/or charging power of the discharging board in accordance with the received charging efficiency data and the charging efficiency adjustment data.

Abstract: An electric power trade brokering system includes: a task information acquiring unit that acquires task information about a plurality of tasks of a moving body on which a storage battery is mounted and that is movable by utilizing electric power provided from the storage battery; and a trade counterparty determining unit that determines, based on the task information acquired by the task information acquiring unit, a counterparty to trade electric power with the moving body at a position where at least one task among the plurality of tasks is carried out.

Abstract: An ECU is configured to perform output restriction control if first and second conditions are satisfied when a cell temperature is more than a threshold temperature determined based on a thermal destruction temperature of a sealing member. On the other hand, the ECU is configured not to perform the output restriction control if one of the first and second conditions is not satisfied even when the cell temperature is more than the threshold temperature. The first condition is satisfied when an acceleration time period is more than a predetermined time period. The second condition is satisfied when the temperature increase ratio of the cell is more than a restriction value.

Abstract: A fuel cell system includes: a converter that boosts a voltage input from a fuel cell; a voltage control device that can control a voltage input from an electricity storage unit; a drive circuit that converts direct-current electricity input from the converter and the voltage control device into alternating-current electricity and outputs the converted electricity to the load; a relay that switches between a connected state in which the fuel cell and the drive circuit are connected to each other and a disconnected state in which they are disconnected from each other; and a controller that determines whether the relay is welded by different determination methods using an index current value between the relay and the fuel cell and a first index voltage value between the relay and the converter when the fuel cell system is to be stopped.

Abstract: An electronic device for detecting the presence of an occupant on board a vehicle includes an audio sensor to acquire sound-sensing signals on board the vehicle. A movement sensor acquires movement-sensing signals associated with movement of the vehicle and an environmental sensor acquires environmental-sensing signals on board the vehicle. A processing unit is coupled to the audio sensor, movement sensor, and environmental sensor processes the respective sound-sensing signals, movement-sensing signals, and environmental-sensing signals to monitor the presence on board the vehicle of the occupant and the absence of a responsible person to determine a situation of danger and to activate a corresponding alarm warning.

Abstract: A seat assembly is provided with sensors. A controller measures pressure in a plurality of regions with a seated occupant over a period of time. A change in pressure is determined from an initial seating position to a second seating position and evaluated to determine a vector of pressure change. A fidget is identified if the vector exceeds a predetermined value. A camera is directed at the seat bottom and the seat back. The controller evaluates a camera input to determine anatomical dimensions of the seated occupant.

Abstract: This vehicle seat control device is provided with a storage unit, a position detection unit, a control unit, and an operation order setting unit. The space on a seat occupied by a passenger sitting in the seat is a sitting passenger-occupied space, and during the execution of an automatic operation, the operation order setting unit is configured to set the operation order such that position adjustments of seat elements operated in the direction of advancing into the sitting passenger-occupied space are started at the same time as, or are started after, the starting of the position adjustments of the seat elements operated in the direction moving away from the sitting passenger-occupied space.

Abstract: A vehicle seat is provided in which a seat back is constrained from tilting down when a seat cushion is moved to a position in which the seat back cannot be tilted down. The vehicle seat includes a base frame, a seat cushion frame (3) horizontally movable relative to the base frame between a first position and a second position different from the first position, a seat back frame (4) rotatable relative to the seat cushion frame (3), a lock member (5) configured to constrain the seat back frame (4) from tilting rearward, and an unlock mechanism (6) configured to release a lock applied by the lock member (5) when the seat cushion frame (3) is moved from the first position to the second position.

Abstract: The present disclosure relates to a seat rail for a vehicle. By using a stopper part of a locking mounting bracket, which is one commonly-used part, the seat rail for a vehicle having a towel bar inhibits a misoperation of a release lever due to the feet of a rear seat passenger by inhibiting interference of the feet of the passenger with the release lever and inhibits deformation of the towel bar when the towel bar is pressed down.

Abstract: The present disclosure relates to a seat rail for a vehicle having a lever shaft configured to be integrally combined with bracket flanges, whereby shaking of a release lever in the forward/backward and leftward/rightward directions may be reduced. When the release lever is rotated in a restoring direction thereof by an elastic force of a lever spring, lever flanges make contact with a locking mounting bracket and a restoring rotation of the release lever stops. In addition, an end portion of the lever spring may be held by and fixed to the release lever so as to improve operability of a locking pin.

Abstract: Disclosed is a pumping device for a seat of a vehicle, the device including: a cam mechanism rotating along with a lever; a clutch mechanism receiving power from the cam mechanism; a housing accommodating the cam mechanism and the clutch mechanism therein; a brake mechanism accommodated in the housing to receive power from the clutch mechanism, and configured such that boss portions protrude along an outer circumferential surface thereof, outer end sides of the boss portions face an inner circumferential surface of the housing, and a pressing portion protruding from the clutch mechanism is disposed between a boss portion and a neighboring boss portion; and a brake roller provided at opposite sides of each of the boss portions of the brake mechanism to be disposed between the boss portion and the pressing portion.

Abstract: A fluttering prevention apparatus for a lever of a pumping device includes: a lever bracket including a first side coupled with a lever, a center portion formed with a hollow hole, and a second side formed with insertion holes; a clutch cam including a first side provided with protruding portions inserted into the insertion holes of the lever bracket; a clutch drum having a first side formed with a seat groove to receive the clutch cam is seated therein; and a spindle coupled to the hollow hole of the lever bracket through center portions of the clutch drum, the clutch cam, and the housing, thereby inhibiting the lever bracket form fluttering with respect to the clutch drum.

Abstract: Disclosed is a seat pumping device for a vehicle, the seat pumping device including: a clutch drum turned by receiving torque of a lever and having a plurality of compressing protrusions radially formed along an edge thereof to be spaced apart from each other; a brake drum coupled to the clutch drum and having a circular vertical flange protruding toward the clutch drum, the vertical flange having a plurality of supporting protrusions protruding laterally of the vertical flange to be arranged between the compressing protrusions; and a securing portion provided between the vertical flange and the clutch drum which face each other, the securing portion guiding a relative turning of the clutch drum and the brake drum while blocking a relative translation of the clutch drum and the brake drum.

Abstract: Disclosed is a seat pumping device for a vehicle. The seat pumping device includes: a housing having a through hole formed therein; a clutch cam positioned on an inside of the housing and coupled such that a coupling protrusion protruding outwardly of the housing through the through hole is turnable relative to the housing; a lever bracket positioned on an outside of an upper surface of the housing so as to face the clutch cam with the housing interposed therebetween, the lever bracket being coupled to the coupling protrusion of the clutch cam to be turned integrally with the clutch cam; and a supporting portion protruding from one of the upper surface of the housing and a lower surface of the lever bracket toward a remaining one, the upper surface of the housing and the lower surface of the lever bracket facing each other, the supporting portion supporting the lever bracket and the housing so as to be spaced apart from each other at a regular interval.

Abstract: Disclosed is a seat recliner for a vehicle, the seat recliner including: a flange provided with internal teeth on an inner circumferential surface thereof; a gear plate disposed in the internal teeth of the flange, provided with external teeth along an edge thereof to be engaged with the internal teeth of the flange with being eccentric with respect to the flange, and formed with a through-hole at a center thereof; a rotating cam disposed at a center of the through-hole of the gear plate; a wedge cam held between the rotating cam and an inner circumferential surface of the through-hole of the gear plate to maintain eccentricity of the rotating cam and the gear plate, and provided with a lubrication part on a contact surface with the rotating cam to preserve lubricant; and an elastic member configured to press the wedge cam.

Abstract: A seat recliner for a vehicle may include: a fixing flange provided with multiple guide parts spaced apart from each other and having a guide groove formed along a locus having a predetermined distance from a center axis; and a rotary cam mounted on a center portion of the fixing flange, rotating about the center axis to press a locking gear such that the locking gear slides along the guide parts. In particular, the rotary cam includes: a first protrusion formed on a mount surface of the rotary cam, which is coming into contact with the fixing flange when mounted; and a second protrusion formed on a surface opposite to the mount surface and capable of engaging with a control plate. When the first protrusion is inserted into the guide groove, the guide groove guides a rotation of the rotary cam.

Abstract: Disclosed is a seat recliner for a vehicle, the seat recliner including: a first flange provided with a plurality of guide parts being spaced apart from each other, with guide spaces defined between the guide parts; a plurality of locking gears disposed in the guide spaces of the first flange respectively, configured to slide forward and backward along the guide parts in a radial direction, and provided with external teeth at an outer end of each of the locking gears; and a second flange coupled with the first flange to be rotatable relative thereto, formed in a shape covering the guide parts and the locking gears, and configured to be engaged with the external teeth of the locking gears.

Abstract: Disclosed is a seat recliner for a vehicle, the seat recliner including: a first flange; a plurality of locking gears seated in the guide spaces of the first flange respectively with lower surfaces thereof facing down, sliding back and forth radially along the guide parts, and provided with external teeth and guide protrusions; a locking cam provided with a locking protrusion on an upper surface thereof; a control member seated on the upper surfaces of the locking cam and the locking gears and provided with a coupling part, a locking hole, and guide slits; a second flange; and an input member inserted into the center of the first flange behind the first flange to be coupled with the control member at an end portion thereof and provided with a locking part at the end portion thereof to be coupled with the coupling part of the control member.

Abstract: The invention relates to a child safety seat (100) adapted to be secured with a safety belt (40) of a vehicle, comprising a seat shell (20) for receiving a child; and a seat base (10) for being placed on a seat of the vehicle. The seat base (10) comprises a base member (1) coupled to the seat shell (20); a pivoting component (2) connected pivotably to the base member (1); and an engaging member (3) configured to engage with the safety belt (40) of the vehicle, wherein the engaging member (3) is coupled to the pivoting component (2) such that a movement of the engaging member (3) in a certain direction relative to the base member (1) causes the pivoting component (2) to pivot away from the base member (1).

Abstract: A seat system of a vehicle includes a cushion portion configured to support an occupant sitting on the cushion portion, and a back portion configured to support the back of the occupant sitting on the cushion portion. A lower portion includes: a first side; a second side that is opposite the first side; and an infant car seat base located on the first side. An actuator is configured to selectively actuate the lower portion to: a first position where the infant car seat base is located entirely under the cushion portion; and a second position where at least a portion of the second side of the lower portion contacts the cushion portion and the infant car seat base is located entirely above the cushion portion.

Abstract: Embodiments of a car seat include an outer protective shell, an inner seat, a suspension system connecting and permitting relative movement between the inner seat and the outer protective shell. The suspension system may include a plurality of deformable webs. Also, at least one padding element may be in contact with and interposed between the outer protective shell and the inner seat. In an accident, regardless of the direction in which the seat is facing and regardless of whether the result is a sudden acceleration and/or deceleration, the inner seat will move inside the frame, and the suspension system will absorb some, much, or all of the energy either by elastic or plastic deformation. Energy not absorbed by the suspension system may be absorbed by the inner seat itself and/or an anchor system used to connect the car seat to a vehicle.

Abstract: A pneumatic seat support by itself supports a seat above a floor of a vehicle. The pneumatic seat support has upper and lower air chambers. The lower air chamber is a rigid cylindrical tube. The upper air chamber is a flexible cylindrical bellows, with a diameter greater than the diameter of the tube. Three or more linear shafts extending through the upper air chamber and into the lower air chamber provide a single-degree-of-freedom bearing support structure that allows vertical motion of the seat but withstands horizontal loads on the seat. When the seat moves vertically downward, it compresses air in both chambers, providing a seat support system with a natural oscillation frequency which is less than 2.4 Hz, and preferably in the range of 1.5-2.2 Hz.

Abstract: A seat impact energy absorbing system having an energy absorbing module that limits forces transmitted through the seat to its occupant. Such forces may emanate from, for example, a land mine detonation. The module has frustoconical structures joined by hollow interconnecting ribs that create support pillars there between. At least some of the support pillars have tops.

Abstract: A vehicle seat includes a pelvis movement suppression member, a moving mechanism, a control section and an energy-absorbing mechanism. The pelvis movement suppression member is disposed at a seat upper side of a seat front side of a seat cushion, extends in a seat width direction, and is movable in a seat front-rear direction relative to a frame of the seat cushion. The moving mechanism moves the pelvis movement suppression member from an initial position to a restraining position at a seat rear side relative to the initial position. When a collision is detected or predicted, the control section activates the moving mechanism and moves the pelvis movement suppression member to the restraining position.

Abstract: An occupant support adapted for use in a vehicle includes a seat frame and a seat pad. The seat frame is adapted to couple with the vehicle for movement with the vehicle. The seat pad is adapted to provide a comfortable support interface for an occupant of the occupant support.

Abstract: An occupant support adapted for use in a vehicle includes a seat mount, a seat, and a motion-sickness mitigation system. The seat mount is adapted to couple to the vehicle for movement with the vehicle. The seat is adapted to provide a comfortable support surface for an occupant of the occupant support.

Abstract: The technology described in this document can be embodied in a headrest for a vehicle-seat, the headrest including a first acoustic assembly and a second acoustic assembly. The first acoustic assembly includes a first set of one or more acoustic transducers, and is configured to radiate acoustic energy from a first portion of the headrest in a first radiation pattern. The second acoustic assembly includes a second set of one or more acoustic transducers, and is configured to radiate acoustic energy from a second portion of the headrest in a second radiation pattern. The first acoustic assembly and the second acoustic assembly are configured such that the first radiation pattern and the second radiation pattern are substantially different from one another, and generate an asymmetric radiation pattern for the headrest.