Abstract: A brake system for a vehicle, including: a brake operation member; a hydraulic brake device configured to give a braking force based on an operation of the brake operation member; an electric brake device configured to give a braking force generated by an electric actuator; a regenerative brake device configured to give a braking force utilizing electric power generation by rotation of a wheel, and a controller configured to determine insufficient braking force by excluding the braking force by the hydraulic brake device from a required overall braking force required for the vehicle as a whole and to control the braking force by each of the electric brake device and the regenerative brake device based on the insufficient braking force, wherein the brake system is configured such that the hydraulic brake device gives the braking force when the required overall braking force exceeds a threshold.

Abstract: In one embodiment, a solenoid valve for a vehicle braking system includes a magnet assembly having a winding support, a coil winding, a housing, and a cover disc. The solenoid value further includes a valve cartridge having a capsule, a valve insert, a valve seat, and an armature. The valve insert can be connected to the capsule, the armature can be guided within the capsule in an axially movable manner and has a closing element. The closing element and the valve seat can form a valve that can control a fluid flow through the valve cartridge. The coil winding can be wound on the winding support to form an electrical coil, which can be controlled using control signals applied to electrical connectors. The electric coil generates a magnetic force that can move the armature against a force of a return spring.

Abstract: Electrohydraulic assembly for a brake system, having a hydraulic unit comprising a housing body which houses electrically actuable valves and a hydraulic pump having an electric drive apparatus for the pump, having an electronic unit arranged on the housing body for controlling the valves and/or the drive apparatus, and having a pressure medium reservoir which comprises a first space for pressure medium, a vented second space and a media-separating element that separates the first space from the second space, wherein the pressure medium reservoir is connected to a suction side of the pump, and wherein the pressure medium reservoir is embodied as a pressure medium supply reservoir to keep pressure medium ready for the pump for increasing brake pressure or while the pump increases brake pressure, and brake system having such an assembly.

Abstract: An actuation system, in particular for a vehicle brake, may include an actuating device, such as a brake pedal, at least one first pressure source, e.g., a piston-cylinder unit (master cylinder), which can be actuated in particular by means of the actuating device and a second pressure source, in particular a piston-cylinder unit, with an electro-mechanical drive. The pressure sources may each be connected to at least one brake circuit via a hydraulic line, in order to supply the brake circuit with pressurising medium and to pressurise the vehicle brake. There may further be a valve device for regulating the brake pressure. It is planned that during forward and return stroke at least one brake circuit can be fed controlled pressurising medium by way of the second pressure source.

Abstract: A powertrain system including an engine and transmission is described, and includes a temperature sensor disposed to monitor a hydraulic fluid for the transmission. A method for monitoring the temperature sensor includes monitoring engine operation including engine coolant temperature and monitoring a signal output from the temperature sensor. An indicated temperature slope is determined based upon the signal output from the temperature sensor, and a temperature region associated with the engine coolant temperature is determined. Performance of the temperature sensor is evaluated based upon the indicated temperature slope and minimum and maximum temperature slope thresholds that are associated with the temperature region.

Abstract: A rotation speed of an electric oil pump in the case where an accelerator operation amount falls within a predetermined range is controlled to a rotation speed lower than the rotation speed of the electric oil pump in the case where the accelerator operation amount falls outside the predetermined range. When the range outside the predetermined range of the accelerator operation amount is set to a range in which noise that occurs from a source other than the electric oil pump is large, noise that occurs from the electric oil pump is masked by the noise that occurs from a source other than the electric oil pump and becomes inconspicuous in this range even when the rotation speed of the electric oil pump increases.

Abstract: An engine ECU executes a control routine including steps of performing output variation control for periodically varying the output of an engine, if control of the engine is not being stopped, at the time of a communication abnormality, and a predetermined time elapses from the time of occurrence of the communication abnormality, and a step of performing fuel-cut control, when the engine speed falls outside a predetermined range.

Abstract: A method is provided for operating a navigation system of a hybrid motor vehicle having a combustion engine and an electric motor that is fed from an associated battery. In this method, an efficiency route enabling a maximum utilization of the electric motor is determined by the navigation system, where at least one item of efficiency information is considered in the determination of the efficiency route. The efficiency information is provided dynamically by a drive control device of the motor vehicle and is dependent on the current operating state and/or the current operating prediction.

Abstract: A power supply system includes a first energy storage, a second energy storage, a power transmission circuit, and circuitry. The circuitry acquires at least one of a request supply amount and a request output amount. The circuitry calculates a first input or output target amount and a second input or output target amount in accordance with at least one state quantity including the at least one of the request supply amount and the request output amount. The circuitry controls the power transmission circuit to control electric power transmission so that the first input or output target amount and the second input or output target amount are satisfied. The circuitry controls the power transmission circuit so that a change in an amount of the electric power transmission decreases even though changes in the first input or output target amount and the second input or output target amount are discontinuous.

Abstract: Systems, methods and apparatus for controlling operation a hybrid powertrain are disclosed that use low power storage and motor/generator components in line haul operations. In one embodiment, a line haul drive cycle includes a low power motor/generator executing a power assistance operation of the hybrid powertrain powered by electricity from a low power storage responsive to a monitoring by a line haul controller of ascensions of the hybrid vehicle at or near a constant speed over an uneven terrain. The line haul drive cycle further includes the low power motor/generator executing a regenerative braking operation of the hybrid powertrain supplying captured electric energy to the low power storage responsive to a monitoring by the line haul controller of descensions of the hybrid vehicle at or near the constant speed over the uneven terrain.

Abstract: A method and a system for improving operation of a hybrid vehicle are presented. In one example, an engine exhaust after treatment device is cooled at an opportunistic time. The approach may provide improved cooling for exhaust after treatment devices and it may also improve vehicle emissions.

Abstract: A vehicle includes an electric machine, an engine, an engine mount, and a controller. The engine has a base speed that corresponds to a speed of the electric machine and an engine power demand. The engine mount is disposed between the engine and a vehicle structure such as a frame or unibody. The controller is configured to, in response to compression of the engine mount, increase an engine speed to a value that is greater than the base speed to reduce engine lugging.

Abstract: A vehicle includes an engine, an automatic transmission, a second clutch for engine disconnection, a rotating electric machine, a first clutch for rotating electric machine separation, and an electronic control unit. The electronic control unit switches the first clutch from a release state to an engagement state in a case where a collision of the vehicle occurs, the first clutch is in the release state, and a rotation speed of the rotating electric machine is higher than an input shaft rotation speed of the automatic transmission. In a case where the collision of the vehicle occurs, the first clutch is in the release state, and the rotation speed of the rotating electric machine is lower than the input shaft rotation speed of the automatic transmission, the first clutch is maintained in the release state.

Abstract: When an engine is started by causing a first motor coupled to first drive wheels to motor the engine while a hybrid vehicle is turning with the engine stopped, an electronic control unit controls output torque of a second motor, in such a direction as to curb change of a steering characteristic of the hybrid vehicle due to change of drive torque of the first drive wheels induced by motoring of the engine by the first motor.

Abstract: A hybrid electric vehicle (HEV) comprises an engine and at least one electric machine. The vehicle is operable in an electric vehicle (EV) mode in which the electric machine develops torque to drive the vehicle whilst the engine is switched off. In an embodiment, the vehicle is operable when in EV mode automatically to cause engine turnover without starting the engine when a prescribed one or more conditions are met.

Abstract: A control method and system for a hybrid vehicle with a DCT is provided. The method includes monitoring whether clutch stuck off is sensed and requesting prohibition of regenerative braking by a driving motor and requesting braking control using mechanical braking force to a higher controller when clutch stuck off is sensed. A driving mode is then changed into a single clutch driving mode, in which a vehicle is driven in gear stages realized by a clutch other than the clutch in which the clutch stuck off occurred and the higher controller is requested to prohibit regenerative braking by the driving motor, when clutch stuck off has occurred. Additionally, the higher controller is requested to obtain the braking force for the vehicle from mechanical braking force is response to determining that single clutch shifting has been performed and braking is required.

Abstract: A system for parking a vehicle is disclosed. In various embodiments, the system includes a vehicle including a motor, sensors, a steering system, a processor, and a memory; an autopark program operatively connected to the vehicle's steering system; a navigation program operatively connected to the vehicle and configured to determine the vehicle's speed and lane with the sensors, to evaluate the data, and in response to the evaluation, to automatically execute the autopark program.

Abstract: A vehicle includes an engine, a rotating electric machine, a high-voltage power line, a high-voltage battery, an inverter, a capacitor, an electronic control unit, a low-voltage battery, an alternator, and a low-voltage power line. The capacitor is connected to the high-voltage power line. The electronic control unit is configured to control the engine such that the engine is operated and the alternator supplies electric power to the low-voltage power line in a case where the possibility of the occurrence of a collision of the vehicle is detected. The electronic control unit is configured to perform control such that the capacitor discharges a residual electric charge in a case where the possibility of the occurrence of the collision of the vehicle is detected or in a case where the occurrence of the collision of the vehicle is detected.

Abstract: A method and system for detecting an accident of a vehicle, the method including: receiving a movement dataset collected at least at one of a location sensor and a motion sensor arranged within the vehicle, during a time period of movement of the vehicle, extracting a set of movement features associated with at least one of a position, a velocity, and an acceleration characterizing the movement of the vehicle during the time period, detecting a vehicular accident event from processing the set of movement features with an accident detection model, and in response to detecting the vehicular accident event, automatically initiating an accident response action.

Abstract: When an own vehicle V1 crosses an opposite traffic lane R2 at an intersection to make a right turn, an ECU 20 such as a vehicle control device detects a presence of a crossing person P crossing a crosswalk CW existing near the intersection on a road R3 which the vehicle V1 is directed to enter by making the right turn, detects a size of a space between the crosswalk SP on which the detected crossing person P crosses and the opposite traffic lane, and when performing a control for braking the vehicle V1 so as to avoid a collision of at least the vehicle V1 with the crossing person P, changes a timing to perform the control for braking the vehicle V1 based on the detected size of the space SP up to the crosswalk CW.

Abstract: A lane-change system suitable for use on an automated vehicle includes a turn-signal-actuator, an object-detector, a location-device, and a controller. The turn-signal-actuator is operable to an operation-state by an operator of a host-vehicle. The operation-state includes a left-state, a right-state, and an off-state. The object-detector is used to detect the presence of an other-vehicle proximate to the host-vehicle. The location-device is used to determine a location of the host-vehicle on a digital-map. The controller is in communication with the turn-signal-actuator, the object-detector, and the location-device. The controller determines when the operator intends to pass the other-vehicle or slow down to make a turn or exit the highway based on the operation-state of the turn-signal-actuator and the digital-map.

Abstract: Provided are a vehicle control device, a vehicle control method, and a vehicle control program for more accurately controlling the velocity of an own vehicle with reference to a preceding vehicle. The vehicle control device includes: an identifying part identifying the velocity of the preceding vehicle present in front of the own vehicle and an inter-vehicle distance between the preceding vehicle and the own vehicle; a deriving part deriving an adjustment value, which is a value associated with the inter-vehicle distance between the preceding vehicle and the own vehicle and decreases as the inter-vehicle distance identified by the identifying part decreases, and deriving a target velocity of the own vehicle based on the derived adjustment value and the velocity of the preceding vehicle identified by the identifying part; and a travel controlling part controlling travel of the own vehicle based on the target velocity derived by the deriving part.

Abstract: A path determination apparatus according to this disclosure includes a gate selecting unit that, when a vehicle is to pass through a tolling station having a plurality of gates, selects a gate to pass through from among the plurality of gates. The gate selecting unit is configured to make a judgement as to whether or not a road which the vehicle travels on until passing through the tolling station is an expressway, as one conditional judgement for selecting the gate to pass through.

Abstract: A line lock braking system includes a brake module configured to selectively apply hydraulic braking pressure against first wheels and second wheels of the vehicle, and a controller in signal communication with the brake module. The controller initiates, upon receipt of a request, a vehicle line lock mode and performs line lock braking of the vehicle where the brake module is controlled to selectively apply braking pressure against the first wheels and not the second wheels such that the second wheels are free to rotate based on a throttle applied by a driver; completes the line lock mode upon release of a button being depressed to enter and maintain activation of the line lock mode such that the braking pressure against the first wheels is released; and cancels the line lock mode upon determining a number of rotations of the second wheels exceeds a predetermined number of wheel rotations.

Abstract: A method of managing torque at a vehicle standstill includes outputting torque from a powertrain to satisfy a driver torque demand. The method also includes, in response to a nonzero torque demand resulting in vehicle standstill, applying a friction brake to maintain the vehicle standstill and substantially reducing output torque of the powertrain during friction brake application. The method further includes satisfying driver torque demand using the powertrain and releasing the friction brake in response to the driver torque demand deviating from the nonzero torque demand by more than a predetermined amount.

Abstract: Control system, which is adapted for application in a vehicle and intended to detect following vehicles on the basis of environmental data which are obtained from one or several environmental sensors disposed on the vehicle. The environmental sensors are adapted to provide an electronic controller of the control system with the environmental data which reflect the area in front of, laterally next to and/or behind the vehicle. The control system is at least adapted and intended to detect one or several other vehicles participating in traffic behind the own vehicle with the environmental sensors. A lane associated with each other vehicle, in which the other vehicle(s) drive(s), is detected. An occupancy of the own lane and/or of at least one adjacent lane by the other vehicle(s) is determined.

Abstract: A method is provided for controlling a drivetrain of a vehicle, wherein the drivetrain comprises a multi-clutch transmission. The gear shift of the multi-clutch transmission is adapted to be performed either by power cut shift or by power shift dependent on predetermined vehicle shift conditions. The method includes detecting at least one of a plurality of indications of slippery road conditions and setting a slip risk factor, wherein the slip risk factor is dependent on the indication of slippery road conditions. If the slip risk factor is above a first predetermined threshold value the method further comprises controlling the multi-clutch transmission such that an upcoming gear shift is performed as a power-shift independently of if upcoming shift was determined to be performed as a power-cut shift or as a power shift.

Abstract: A method for damping juddering in the drive train of a vehicle having an electric motor as the drive motor, and a vehicle having a closed-loop control system to carry out the method. The method includes calculating an electric motor setpoint torque for actuating the electric motor from an electric motor request torque which corresponds to a current request for a torque, and calculating a correction torque as a function of the electric motor request torque and a correction factor which is determined from a rotational speed of the electric motor.

Abstract: Driving support ECU determines that a driver is in an abnormal state when a state where a steering amount correlation value which changes when a steering wheel SW of a vehicle is operated does not change continues over more than or equal to an abnormality determination threshold time. When the driver is determined to be in the abnormal state, the ECU decelerates the vehicle, makes a hazard lamp blink and invalidates an acceleration request based on a change in an operation amount of an accelerator pedal. The ECU terminates decelerating of the vehicle and permits the acceleration override when a specific driving operation (an operation that the accelerator pedal changes from an operating state to a non-operating state and then again changes to the operating state within a predetermined threshold time) is determined to have occurred after the driver has been determined to be in the abnormal state.

Abstract: A drive assistance system includes an onboard device that is mounted on a vehicle performing automatic driving based on sensing information detected by a sensor of the vehicle, and a center that communicates with the onboard device. The onboard device includes a sensing information acquisition portion that acquires the sensing information. Either the onboard device or the center includes an evaluation portion that evaluates a detection performance of the sensor based on the sensing information. The center includes a region specification portion that specifies a decrease region where the detection performance of the sensor decreases, the decrease region specified by the detection performance, based on the sensing information, and the decrease region specified by a position at which the sensing information has been detected. The onboard device stops the automatic driving when the vehicle is located in the decrease region.

Abstract: An interaction system for a vehicle includes a human machine interface controller coupled to a plurality of interface components that communicate information to a driver of the vehicle. The interaction system also includes a situational awareness module coupled to the human machine interface controller. The situational awareness module is configured to monitor driver and vehicle conditions, generate a comprehensive driving conditions status, and communicate the comprehensive driving conditions status to the human machine interface controller using a specified protocol.

Abstract: Disclosed is a method for guiding passengers of public transport, in particular of trams or trains respectively, at stations or in station areas and/or inside the transportation unit. The passengers embark and disembark in the embark-/disembark area via at least two doors, and the embark-/disembark area extends to the length of the vehicle. The method includes: generating a prediction of the occupancy level of the vehicle with regard to the resulting situation in the vehicle after disembarking at each stop; distributing of the passengers which are moving to the entry area and/or waiting in the entry area ready for embarking corresponding to the prediction to the area of the doors for an approximately uniform distribution of the passengers inside the vehicle; and if applicable, distribution of the passengers inside the vehicle under consideration of the predicted, preferably section-wise occupancy level and of the passengers actually ready for embarking.

Abstract: A power system for a locomotive. The power system has a first power unit, a second power unit, a first inverter configured to power the first power unit or the second power unit, a second inverter configured to power the first power unit or the second power unit. Further the power system has a first controller selectively coupled to one of the first inverter or the second inverter to control the operation of the first inverter or the second inverter and a second controller selectively coupled to one of the first inverter or the second inverter to control the operation of the first inverter or the second inverter.

Abstract: A control device prevents rapid changes in an internal pressure of an enclosed space induced by an external environment. The control device includes a first pressure sensor in the enclosed space, a second pressure sensor outside the enclosed space, a pressurized container and a vacuum container in the enclosed space and a regulator to at least partially compensate for rapid pressure changes in the enclosed space detected in response to signals generated by the first and second pressure sensors. If the detected rapid pressure change is a decrease in the internal pressure in the enclosed space, the regulator controls the pressurized container to provide a controlled supply of air and if the detected rapid pressure change is an increase in the internal pressure in the enclosed space, the regulator controls the vacuum container to remove of air from the enclosed space.

Abstract: A high-speed rail train bogie frame includes side sills and cross beams located between the side sills, and each of the side sills is provided with an air spring seat configured to install an air spring; wherein each of the cross beams has a seamless steel tube structure; the frame further includes a passage, and a main air chamber of the air spring and a cavity of the cross beam are in communication with each other through the passage; and an anti-roll bar seat configured to install an anti-roll bar is welded below the side sill, and the anti-roll bar seat is in a circular arc transition with a bottom of the side sill, to form a dovetail structure.

Abstract: A rail vehicle includes a coupling disposed centrally in a front region of the rail vehicle. The coupling is mounted in a transversely extended crossmember, so that forces acting on the coupling are introduced through the crossmember into abutments which are supported on a front side of a car body of the rail vehicle. The crossmember is connected through at least one elastic energy absorption configuration to one of the abutments.

Abstract: The present invention is a system and method for the control of applying lubrication to the wheels of a fleet of railed-based vehicles and the rails on which the railed-based vehicles travel. In an aspect, the wheel-rail lubrication fleet management system is configured to analyze and optimize the application of wheel/rail lubrication within a whole fleet to the best possible efficiency. In an additional aspect, the wheel-rail lubrication fleet management system is further configured to manage the noise created by the interaction between the wheels and rails of the whole fleet. In such aspects, the wheel-rail lubrication fleet management system can monitor the real results of the application of lubricant of rail-wheel systems that utilize the lubrication fleet management system.

Abstract: According to one embodiment, an abnormality diagnosis apparatus includes processing circuitry. The processing circuitry estimates a reduction amount of a regeneration amount of a diagnosed vehicle that is a railway vehicle, based on vehicle data of the diagnosed vehicle and vehicle data of a peripheral vehicle different from the diagnosed vehicle. The processing circuitry corrects the regeneration amount of the diagnosed vehicle, based on the estimated reduction amount. The processing circuitry diagnoses abnormality of a regenerative brake of the diagnosed vehicle, based on the corrected regeneration amount.

Abstract: A driving assistance device including means for determining a target speed, means for comparing an instantaneous speed of the railway vehicle with the target speed or with an interval around the target speed, and means for displaying driving instructions intended for a conductor of the railway vehicle, the driving instructions including instructions for modifying the instantaneous speed in order to bring it closer to the target speed, the display means being configured to: display a speed increase instruction icon when the instantaneous speed is below a first predetermined value, and to display a speed decrease instruction icon when the instantaneous speed is above a second predefined value.

Abstract: The driving assistance device (10) for a railway vehicle comprises means (12) for determining a target speed (Vc), means (20) for comparing an instantaneous speed (Vi) of the railway vehicle with the target speed (Vc) or an interval surrounding the target speed, and means (22) for indicating driving instructions intended for a driver of the railway vehicle, said driving instructions including instructions for modifying the instantaneous speed (Vi) with view to bringing it closer to the target speed (Vc).

Abstract: A decorative tree storage container including an enclosure having a proximal end, a distal end, and an underside surface, is provided, and described. The storage container can be sized to hold a decorative tree, and can include one or more wheels coupled to the enclosure and positioned at a wheel location between the proximal end and the distal end that increases the clearance between the underside surface of the enclosure and a supporting surface when a decorative tree is in the enclosure and a user is lifting the proximal end by the handle.

Abstract: A keg transporter. The keg transporter includes a base having a pair of opposing ends, a pair of wheels, wherein each individual wheel is rotatably connected to one of the opposing ends of the base, and a vertical member extending upwardly from the base. A horizontal bar is disposed on the vertical member, and a pair of support arms extends therefrom. A pair of handles is disposed on opposing sides of an upper end of the vertical member, and a support hook disposed on the vertical member between the handle and the horizontal bar. The support hook fits through the opening of a beer keg handle and supports the keg along with the pair of support arms. The keg transporter allows individuals to easily transport a heavy keg over varying terrain.

Abstract: A transport cart 40, which consists of a U-shaped bow, between the vertical struts of which horizontal struts in the form of round pipes are arranged one over another in levels. These transverse struts have multiple upwardly protruding holding elements, for example, in the form of inclined pins or journals, on which carrying bags are fastenable using the handles thereof.

Abstract: A service cart for storing components of a substrate processing system includes a first side configured to store a transfer plate removed from the substrate processing system. The first side includes a first mount and a second mount that are spaced apart to retain respective upper portions of the transfer plate. Each of the first mount and the second mount includes a respective groove arranged to retain the upper portions of the transfer plate. The first side further includes a first bumper and a second bumper that are spaced apart to abut respective lower portions of the transfer plate. Each of the first bumper and the second bumper are arranged to retain a desired distance between the first side and the lower portions of the transfer plate. A second side of the service cart includes a drawer or an opening to provide access to an interior of the service cart.

Abstract: Embodiments of the disclosed invention provide for a wheeled apparatus suitable for storing liquids, such as water for consumption, when ordinary drinking water may be scarce or unavailable. Embodiments disclosed herein can be collapsed and stored in a small profile arrangement during periods when the apparatus is not in use. Embodiments may include wheels so that the apparatus may be assembled in one location and rolled to a water source, and rolled to shelter when full of water. Embodiments may provide a hose to connect the apparatus to a standard household faucets or spigots. Once the apparatus is filled, it can be rolled to storage location while awaiting future needs. After an emergency situation passes, the apparatus may be drained and re-packed for storage.

Abstract: A transport cart and a method using a transport cart transports objects or animal carcasses. The transport cart has a loading trough which has a region which is arranged on a side of the loading trough facing away from a handlebar and/or from at least one handle, wherein the region has at least one loading and/or unloading device, thus making loading and/or unloading possible such that the object which is to be transported or the transported object or the animal carcass which is to be transported or the transported animal carcass does not have to be touched by an operator.

Abstract: A pallet is provided for supporting cylinders. The pallet can have a convex spine extending substantially the length of the pallet in a longitudinal direction, having a backstop at a first end. The pallet has one or more trays attached transverse to the convex spine, each tray having longitudinal fluted indents to restrain a cylinder from rolling transverse, the longitudinal fluted indents are each arranged to accept a cylinder from above. The pallet has a left outrigger attached and extending transverse to the convex spine, the left outrigger stabilizing the pallet with respect to terrain, as well as a right outrigger attached and extending transverse to the convex spine, the right outrigger stabilizing the pallet with respect to terrain. The pallet can have a coupling extending from an end of the convex spine, wherein the coupling is arranged to take a crane hook in engagement to pull the pallet.

Abstract: A child stroller system having a frame-assembly including a frame, a plurality of wheels, and a push-handle. The seat-assembly includes a seat and a seat-mounting-bracket, a storage bag support-assembly including a storage-bag and a bag-mount-member. The frame-assembly, the seat-assembly, and the storage bag support assembly in functional combination allow the seat to swing-rotate in relation to the frame and the bag-mount-member providing a resting platform for the storage-bag. The frame-assembly supports the seat-assembly and the storage bag support-assembly such that a child and stored items are able to be transported simultaneously. The child stroller system further includes a kinesthetic toy attached to the seat to provide amusement for said child.

Abstract: A stroller track system is used to facilitate the transporting of a stroller up and down stairs. The stroller track system includes a stroller, a left tread assembly, and a right tread assembly. The left tread assembly and the right tread assembly are mounted to a frame of the stroller and are used to engage multiple stairs while traversing a set of stairs. This allows the stroller to glide smoothly up or down the stairs. The left tread assembly and the right tread assembly each include a first track and a second track. Together, the first track and the second track allow the left tread assembly and the right tread assembly to span a larger section of a staircase. The first track is mounted to the frame through a first stroller-attaching mount. A track-securing bracket is used to mount the second track to the frame.

Abstract: A steering system includes a column jacket including a lower jacket and an upper jacket; an engagement member; a retaining member; and a buffer member that is retained by the retaining member and contacts the engagement member in a contact direction at a time when the upper jacket is displaced to one sliding end. The retaining member includes a support surface that supports the buffer member; paired holding portions that are respectively disposed on both sides of the buffer member in a circumferential direction of the upper jacket and hold the buffer member toward the support surface; and a restriction portion configured to be engaged with an end of the butler member on a side toward which an opposite direction is directed, so as to restrict movement of the buffer member in the opposite direction, the opposite direction being opposite to the contact direction.