Abstract: A power supply device for a vehicle includes first and second systems, a switch disposed between the systems, and first and second controllers. The first system includes a first power supply and a first electrical apparatus. The second system includes a second power supply and a second electrical apparatus. The first mode controller executes a low power mode where the switch is turned on to supply electric power from one of the first and second power supplies to the first and second electrical apparatuses. The second mode controller executes a high power mode where the switch is turned off to supply electric power from the first and second power supplies to the first and second electrical apparatuses, respectively. When a discharge electric current of the second power supply exceeds a threshold during the low power mode, the second mode controller switches the power supply mode to the high power mode.

Abstract: A vehicle control device includes: first and second power supplies, and a control unit controlling to, when a remaining capacity difference between the first power supply and the second power supply is large, to reduce a first operating range, in which the connection state with the electrical load is controlled to be series connection state of the power supplies, and increase a second operating range, in which the connection state with the electrical load is controlled to be the parallel connection state of the power supplies or the single connection state of one of the power supplies having a larger remaining capacity, as compared with a case where the remaining capacity difference is small.

Abstract: An onboard electrical system for a motor vehicle is provided having a primary power supply network and a secondary power supply network electrically connected to the primary power supply network via a DC-DC converter, wherein the primary power supply network and the secondary power supply network are connected to one another via a blocking diode of the DC-DC converter and the blocking diode has a forward direction thereof oriented from the primary power supply network toward the secondary power supply network, and wherein an insulation monitoring device having a measuring resistor is associated with the secondary power supply network for determining an insulation fault. It is provided that an additional resistor is connected in parallel with the blocking diode for bridging thereof, such that an insulation fault common to the primary power supply network and the secondary power supply network can be determined by the insulation monitoring device.

Abstract: Front part of the body of a vehicle, comprising side reinforcements in case of a frontal impact with another vehicle. Each of the ends of the front beam (1) comprises a rigid reinforcing end piece (4) secured to, and extending from, the front beam (1) and being curved towards the rear of the vehicle, the reinforcing end piece (4) being covered with a damping cover (6).

Abstract: A vehicle includes a vehicle door and a diaphragm. The vehicle door includes an inner door panel and an outer door panel that define a door cavity therebetween. The diaphragm is disposed within the door cavity and is attached to an inner surface of the outer door panel. The diaphragm cooperates with the inner surface of the outer door panel to define a diaphragm cavity.

Abstract: A means of locomotion, an arrangement as well as a device (1) for evaluating a signal of an airbag control unit (2) are being put forward. The device (1) comprises a first connection (3) for electrically contacting an output of the airbag control unit (2), a rectifier (5) that is electrically connected to the first connection (3), a temperature-compensated driver (6) that is connected to an output of the rectifier (6) [sic], and a member (7) for the galvanic decoupling of an output of the driver (6), having an output unit (8). The rectifier (6) provides polarity reversal protection for the first connection (3) so that the driver (6) receives an output signal from the airbag control unit (2) essentially identically, independently of its polarity.

Abstract: An airbag device includes: an airbag that is folded in normal times and is inflated and deployed in emergency situations; an inflator that supplies a gas to the airbag; a retainer that supports the airbag and the inflator; a module cover that has a plate-like section and a side wall section provided upright on the plate-like section, wherein a hook formed on the retainer is retained in an opening formed in the side wall section; and a first protector cloth that is retained in the hook, and covers an upper surface of a folded body of the airbag to maintain a folded shape of the airbag.

Abstract: The present invention relates to a flexible molded skin as part of a composite structure for an airbag cover, and to a composition for producing such a skin using slush molding. The composition and flexible molded skin have a thermoplastic plasticized vinyl polymer, and a tear promoting agent selected from the group of one or more particulate blowing agents, inorganic mineral materials, organic filler materials and microspheres or a mixture of two or more of the afore mentioned materials. The particles of the particulate tear promoting agent have an average particle size of between 0.005 and 50 ?m, preferably between 0.005 and 40 ?m.

Abstract: An airbag system having an airbag control module configured to detect a direction of impact of a vehicle, an airbag assembly having an airbag cushion with an internal tether, and a tether adjustment mechanism. The tether adjustment mechanism is in communication with the airbag control module and engagement with the tether. The airbag control module is configured to send a signal to the tether adjustment mechanism to adjust the tether by ratcheting a portion of the middle segment of the tether when the airbag cushion deploys such that one of a first tether length and a second tether length is extended and the other of the first tether length and the second tether length is contracted to provide a larger volumetric capacity of the airbag cushion in the direction of impact.

Abstract: The invention describes an igniter support (22) for an igniter unit (20) of a gas generator (10), comprising a first holder element (30) made from a first material and a second holder element (32) made from a second material different from the first material. Both holder elements (30, 32) can be positively coupled to each other. Further, a subassembly (16), a gas generator (10) and a method for manufacturing a gas generator (10) are described.

Abstract: An ADAS-linked active hood apparatus includes an ADAS device that measures information regarding a driving state of a vehicle and an object and a collision sensor unit that is positioned at a front of the vehicle and measures collision with the object. An active hood lift system (AHLS) raises one end of a hood of the vehicle based on a signal from the collision sensor unit. A controller sets a pedestrian detection threshold (PDT) turn, receives information regarding a plurality of front objects from the ADAS device to compensate for a PDT, compensates for an output reference value of the collision sensor unit based on the compensated PDT, and determines whether collision occurs using the collision sensor unit to adjust pop-up of the AHLS when an output value equal to or greater than the compensated reference value is applied.

Abstract: A seat belt retractor that includes a torsion bar is positioned in a spool. The second end of the torsion bar is engaged with a locking mechanism mounted to the frame. The torsion bar is configured to be locked at the second end while the first end rotates with the spool so that the torsion bar deforms to absorb force. The locking mechanism includes a lock base and a locking hub that is mounted to the second end of the torsion bar and is releasably connected to the lock base to prevent the second end of the torsion bar from rotating. The locking hub is configured to be released and rotate relative to the lock base to thereby permit rotation of the second end of the torsion bar with the first end of the torsion bar and the spool.

Abstract: An alert device alerts a driver sitting on a driver's seat in a vehicle by winding a seat belt on the driver's seat with a retractor. The alert device includes a seat position information acquisition unit configured to acquire seat position information relating to a position of the driver's seat, a height estimation unit configured to calculate art estimated height that is an estimated value of the driver's height based on the seat position information, a winding strength setting unit configured to set a winding strength that is a strength for winding the seat belt with the retractor based on the estimated height, and a retractor control unit configured to operate the retractor to wind the seat belt with the winding strength.

Abstract: A vehicle immobilization system which includes electronic systems mounted in the vehicle rear-view housing. The vehicle becomes disabled, at predetermined conditions, when a signal from a remote source is transmitted to the vehicle.

Abstract: A method for access to a vehicle includes determining first environment patterns for a plurality of interfaces relative to a vehicle, determining whether the first environment patterns match second environment patterns for the plurality of interfaces relative to an identification device, and allowing access to the vehicle if a match is determined.

Abstract: A method for access to a vehicle includes receiving data from an identification device related to at least one device environment sensor of the identification device. At least one pattern associated with the received data is identified. An environment of the identification device based on feedback from the at least one device environment sensor is determined. The environment to the at least one pattern is compared. In response to the comparing step, access to the vehicle is allowed or denied.

Abstract: Systems and methods for remotely locking and unlocking vehicle accessory locks of vehicle accessories positioned on a vehicle are disclosed. The vehicle includes main doors with locks that are remotely lockable and unlockable using main door lock actuators. Vehicle includes a vehicle controller that receives a user signal from a user, first determines a main door actuation command based on the first signal, and first transmits, based on the main door actuation command, a first actuation command signal to the main door lock actuators. The system includes accessory lock actuator(s) operably coupled to the accessory lock(s), accessory lock controller(s) operably coupled to the accessory lock actuator(s), and a gateway controller operably coupled to the vehicle controller. Gateway controller second determines an accessory lock actuation command based on the first actuation command signal, and second transmits, based on the accessory lock actuation command, a gateway signal to the accessory lock controller.

Abstract: An electronic key apparatus 100 used by a user of a vehicle in a smart entry system comprises a transceiver 110 configured to perform a radio communication with the vehicle, a sensor device including at least one of a GNSS receiver 161 and an acceleration sensor 162, and a controller 130 configured to control whether to set a transmission stop mode based on an output of the sensor device 160, the transmission stop mode being for causing the transceiver 110 to stop transmission of a radio signal used for unlocking the vehicle or starting a power source of the vehicle

Abstract: A passive entry system for a vehicle includes a portable fob and a communication and control unit disposed on the vehicle, the communication and control unit configured to control a function of the vehicle. The portable fob and the communication and control unit are configured to communicate ultra-wideband (UWB) signals therebetween. When the function of the vehicle is triggered, the communication and control unit initiates a double-sided UWB ranging session with the portable fob where (i) the portable fob determines a first distance between the portable fob and the communication and control unit, and (ii) the communication and control unit determines a second distance between the portable fob and the communication and control unit. The communication and control unit is configured to prevent control of the function of the vehicle if a final distance, determined from the first and second distances, is greater than the predetermined distance.

Abstract: The invention relates to a method for authenticating a vehicle user. In the method, movement data of a sensor identification circuit are detected by sensors. The detected movement data are supplied to a self-learning system. The self-learning system ascertains a movement profile based on the supplied movement data and assigns this to a vehicle user. Upon approach of the vehicle by a vehicle user, it is checked whether movement data detected at the point in time of the approach corresponds to a movement profile, which is assigned to a vehicle user authorized to use the vehicle. In the event of a match, the vehicle user approaching the vehicle is authorized to use the vehicle.

Abstract: A movable body comprising a monitoring device configured to monitor a surrounding environment of the movable body through a window member, a heating device configured to heat a portion of the window member within a monitoring area of the monitoring device, an air conditioning device, and a control device, wherein operation modes of the control device include a first mode in which both the heating device and the air conditioning device are driven, and a second mode in which the driving force of the air conditioning device is smaller than that in the first mode, and the control device evaluates the degree of fog on the portion of the window member and determines one of the operation modes based on the result of evaluation.

Abstract: A movable body comprising a monitoring device configured to monitor a surrounding environment of the movable body through a window member, a heating device configured to heat a portion of the window member within a monitoring area of the monitoring device, an air conditioning device, and a control device, wherein the monitoring device includes a detector configured to detect the surrounding environment, and a base member that faces an inner wall of the window member and is disposed such that a detection surface of the detector is located within a space between the base member and the window member, the space is in communication with the inside of the movable body, and the control device sets the driving force of the air conditioning device to be greater when a decrease in heating performance of the heating device is detected.

Abstract: Fastening device for a windshield wiper actuation linkage system, this device including a plate (32) intended to be fastened to a vehicle body (36) and at least one fastening member (34) intended to be inserted into a first orifice in said plate and an aligned second orifice in said body, said at least one fastening member being configured to be rotatable in said first and second orifices from a first, unlocking position to a second, locking position, and vice versa, characterized in that said plate comprises positioning means intended to cooperate in a form-fitting manner with complementary means of said body.

Abstract: In a case in which an instruction to change to a wiping speed, which is determined from a target speed map, is inputted at a time during control of a rotational speed of a wiper motor that is based on a target speed map, a microcomputer gradually changes the rotational speed of the wiper motor from a rotational speed determined from a target speed map to a rotational speed determined by a target speed map. Further, in a case in which a wiper switch is operated while wiper blades exist within a switching prohibited region, the microcomputer switches a target speed map that is used from a time that the wiper blades reach reversal positions.

Abstract: A wiper motor control circuit carries out control in which a driving circuit generates, and supplies to a wiper motor, a voltage that eliminates deviation between a target speed and an actual speed of an output shaft. In a case in which a state in which the deviation between the target speed and the actual speed is greater than or equal to a predetermined threshold value continues for a predetermined time or more, the wiper motor control circuit carries out control that lowers the target speed and in which the driving circuit generates, and supplies to the wiper motor, a voltage that eliminates deviation between the lowered target speed and the actual speed of the output shaft.

Abstract: A method of monitoring a windshield of a vehicle including: capturing an image of a windshield of a vehicle; determining that debris is located on the windshield in response to the image of the windshield; determining a location of the debris on the windshield; determining to remove the debris from the windshield; and actuating a drive motor of a wiper system to clean the location, the drive motor being operably connected to a wiper arm having a wiper blade.

Abstract: There is provided a wiper device a wiper device for wiping a surface of a window portion of a vehicle with an imaging device disposed adjacent to the window portion, wherein accuracy of image capturing by the imaging device can be improved. A semi-pantograph wiper assembly 2A on a driver's seat side and a wiper assembly 2B on a passenger's seat side are provided on a surface of the window portion 1 of the vehicle. Both of imaging areas 7A, 7B of the imaging device (camera) for driving assistance are disposed within an overlap area 6 in which a wiping area 5A of a wiper blade 3A of the wiper assembly 2A and a wiping area 5B of a wiper blade 3B of the wiper assembly 2B overlap.

Abstract: A windscreen wiper device of the “flat blade type” is provided comprising an elastic, elongated carrier element and an elongated wiper blade including at least one longitudinal groove, in which groove a longitudinal strip of the carrier element is disposed. The windscreen wiper device comprises a connecting device for an oscillating wiper arm with end caps provided at both free ends of the wiper blade. The end caps each comprise engaging members sidewardly engaging the wiper blade from the outside. The engaging members comprise retaining means that engage into opposing longitudinal slits on said longitudinal sides of said wiper blade to retain the end caps onto the wiper blade. The retaining means comprises at least one sidewardly extending gripping tooth for gripping an intermediate web of the wiper blade. The gripping tooth is hingeable in a longitudinal plane perpendicular to the vertical median plane of the wiper blade.

Abstract: A system and method of collecting and conditioning rainwater and other moisture, such as dew, from a windshield of a vehicle and utilizing the collected fluid to replenish the fluids in the windshield washer reservoir. A collection funnel is positioned on a vehicle in order to collect rainwater and other moisture. Rainwater and other fluids from the collection funnel are directed to a conditioning cartridge capable of treating the fluid with a surfactant to form a mixed fluid. An anti-freeze material may also be added. The mixed fluid is directed to the pre-existing windshield washer reservoir.

Abstract: A foreign matter removal device is configured to remove foreign matters on a lens (101) of an in-vehicle camera (100) attached to a vehicle so that the lens (101) of the in-vehicle camera (100) is exposed toward an outside of a body panel of a vehicle. The foreign matter removal device includes a generation unit configured to generate high-pressure air and a nozzle unit (2) having a nozzle (22) configured to inject the high-pressure air toward the lens (101) and an attachment part (21) formed integrally with the nozzle (22) and attachable to a housing (102) of the in-vehicle camera (100). A tip end of the nozzle (22) is positioned with respect to the lens (101) in a state where the attachment part (21) is attached to the housing (102).

Abstract: This vehicle cleaner unit is provided with: a cylinder unit comprising a cylinder which forms a chamber, a discharge port through which the chamber opens to the outside, and a piston which reciprocates inside of the cylinder and discharges from the discharge port a cleaning medium inside of the chamber; a power unit comprising a motor, a power transmission mechanism which transmits rotary motion of the motor to the piston to cause the piston to reciprocate, and a housing which houses the motor and the power transmission mechanism; and a casing which houses the cylinder unit and the power unit. The cylinder unit and the power unit are supported by the casing with rubber members interposed therebetween.

Abstract: An inline vertical tack-off system for cleaning vehicular bodies that eliminates the need to spatially dispose rotating brushes and thereby enhance the cleaning efficiency while reducing the space occupied by the apparatus by vertically aligning a plurality of cleaning brushes to clean the full height of a vehicle body. Additionally, the apparatus includes a positioning system which allows the tack-off brushes to move in relation to any of a variety of vehicular bodies by adjusting the distance between the brushes and the vehicle body under the control of a program, as well as by controlling the tilt of the brushes match the vehicle contours and thereby optimize the contact force applied by the brushes to the vehicular surface being cleaned. Also, the system includes a vortex enhanced plenum utilized to evacuate ambient air and contaminant particles.

Abstract: A method for operating an autonomous transportation vehicle fleet with autonomously driven transportation vehicles which identifies a service requirement of at least one transportation vehicle of the transportation vehicle fleet; identifies a service action to be carried out on the transportation vehicle based on the service requirement identified for the transportation vehicle; identifies a suitable service station for performing the service action; autonomously drives the transportation vehicle to the identified service station; and autonomously performs the service action on the transportation vehicle in the service station.

Abstract: The invention discloses a reusable logistics box for a pedal-type battery car, which comprises a bottom plate and a fixing block fixedly arranged on the right end of the front end of the bottom plate. The bottom plate and the fixing block are provided with automatic opening and closing. Device, the automatic opening and closing device includes a first side plate symmetrically disposed on the bottom plate and the upper and lower sides of the fixing block, and a first sponge pad is fixed on an end surface of the opposite side of the first side plate, and The rear side of the fixing block is provided with a front wheel fixing device, and the first side plate is provided with a pressing rod device.

Abstract: Power dollies can be used for moving moveable objects such as trailers. A power dolly could include a frame, a mount and a plurality of wheel sets. The mount could couple the power dolly to a moveable object. One or more of the plurality of wheels sets could be powered. The plurality of wheels sets could be separated into a primary wheel set and one or more support wheel sets. The wheels of the primary wheel set could extend farther from the frame that the wheels of the support wheel sets.

Abstract: A parking lock arrangement for a drive train of a motor vehicle includes: a controllable locking mechanism for blocking a rotational movement of a drive element in the drive train of the motor vehicle, wherein the locking mechanism comprises a spindle drive with a spindle shaft rotationally drivable about a spindle axis, an actuator for rotatingly driving the spindle shaft and a positioning element movable by rotating the spindle shaft for actuating a blocking element, which acts at least indirectly on the drive element in a blocking or releasing manner, and an unlocking mechanism for forced releasing of the locking mechanism, the unlocking mechanism comprises an unlocking element for rotating the spindle shaft and a manually operable control element for operating the unlocking element, characterized in that the unlocking element is movable via the control element from a normal position, in which the unlocking element is spaced apart from the spindle shaft, into an engagement position, in which the unlocking

Abstract: A vehicle brake assembly includes an actuation lever coupled to a brake pedal. The brake assembly also includes a push rod of a brake booster. The push rod has a clevis on an end portion thereof. The clevis comprises two prongs. The brake assembly further includes an alignment device seated on each respective prong of the clevis. The alignment devices are configured to collectively guide and position the clevis into alignment with the actuation lever during construction of the brake assembly.

Abstract: An emergency halt method for a vehicle driving at least partially in automated fashion. The method includes receiving an emergency halt signal; providing a blocking signal, a first control unit being blocked, and the control over controlling driving maneuvers of the vehicle being withdrawn from the first control unit; and providing a not-drive signal for starting an emergency halt maneuver of the vehicle.

Abstract: A driving assistance apparatus is configured to provide deceleration assistance of decelerating a host vehicle, and is configured to end the deceleration assistance on condition that a pedal operation is performed by a driver while the deceleration assistance is provided. The driving assistance apparatus is provided with: an estimator configured to estimate an operation intention of the driver associated with an operation of a brake pedal, on condition that the brake pedal is operated by the driver while the deceleration assistance is provided; and a controller programmed to delay timing in which a deceleration assistance amount associated with the deceleration assistance becomes zero at, the end of the deceleration assistance, if the estimated operation intention is caused by the target, in comparison with that if the estimated operation intention is not caused by the target.

Abstract: An automatic braking system and method are provided for controlling the automatic operation of a pneumatic (air) brake system installed on commercial highway vehicles and the like, particular heavy trucks and buses. When a possible collision is detected or an object is detected in proximity to at least one side and/or end of the vehicle, the system automatically operates the existing, factory installed air braking system of the vehicle to avoid a collision or mitigate the collision impact by concurrently pressurizing each of the rear and front pneumatic service brakes of the vehicle. Pressing the existing vehicle brake pedal deactivates the automatic braking system, thereby permitting the driver to take over control of braking at any time.

Abstract: A control device for a vehicle including a first brake device that applies a braking force to vehicle wheels in response to a driver's operation of a brake, a second brake device that applies a braking force to the vehicle wheels through an electric actuator when a shifting operation position is switched to a parking position, and a parking lock mechanism that stops rotation of the vehicle wheels by stopping rotation of a parking gear interlocking with the vehicle wheels when the shifting operation position is switched to the parking position. The control device includes an electronic control unit configured to maintain an operating state of the first brake device until the braking force is applied to the vehicle wheels by the second brake device when the shifting operation position is switched to the parking position after the first brake device has been operated by the driver.

Abstract: A brake control device has: a first control unit which controls a first pressurizing mechanism capable of pressurizing a brake fluid using one pressurizing mode among a plurality of set pressurizing modes; and a second control unit which controls a second pressurizing mechanism separate from the first pressurizing mechanism and capable of pressurizing the brake fluid pressurized by the first pressurizing mechanism, wherein the first and second control units perform cooperative control based on the control information. The brake control device includes a mode estimation unit for estimating the current pressurizing mode set in the first pressurizing mechanism when the transfer of the control information is blocked. The second control unit is provided with a specific control unit which, in a state in which the transfer of the control information is blocked, controls the second pressurizing mechanism according to the pressurizing mode estimated by the mode estimation unit.

Abstract: Disclosed is an example for performing aircraft braking based on real time runway condition. In one example, during landing, real time data of runway condition may be obtained using at least one sensor disposed around an aircraft. At least one brake factor may be determined based on the real time data of the runway condition. Aircraft braking may be controlled based on the at least one brake factor.

Abstract: A microcomputer-controlled electromechanical braking system comprises an electromechanical braking control device (1) and an electromechanical braking unit (5); the electromechanical braking control device (1) comprises a braking microcomputer control unit (2), an electromechanical control unit (3) and a standby power supply module (4); the braking microcomputer control unit (2) receives a braking instruction signal sent by a driver or an automatic driving system, performs the calculation of a target braking force and braking management, and at the same time, can communicate with braking microcomputer control units (2) of other vehicles in a train group.

Abstract: An antilock brake system is disclosed comprising a first wheel and second wheel disposed on opposite sides of a vehicle. A first electric motor providing torque to the first wheel and a second electric motor providing torque to the second wheel. A sensor monitoring each wheel and a brake on each wheel. A system is described wherein a processor monitors signals from the sensors and increases torque to either wheel when it detects that the wheel is not rotating when another wheel is rotating. Also disclosed is an antilock brake system as above with a third wheel disposed on the rear of the vehicle also comprising a sensor and brake on the third wheel and wherein the processor monitors signals from the sensors to increase torque to either front wheels when it detects that the wheel is not rotating when another wheel is rotating.

Abstract: A vehicle braking system (20) has a primary braking unit (22) with a first pressure generating unit (34) and a first reservoir (26). The vehicle braking system (20) further has a secondary braking unit (24) with a second pressure generating unit (52) and second reservoir (70). A method of operating the vehicle braking system (20) includes actuating the pressure generating unit (34) of the primary braking unit (22) thereby pressurizing a fluid at a wheel cylinder (30) to slow or stop the vehicle. The wheel cylinder (30) is depressurized in response to an electrical signal provided to an electronic control unit (100,102). The fluid is transferred from the wheel cylinder (30) to the second reservoir (70). The fluid path (PI) between the wheel cylinder (30) and the second reservoir (70) is shorter and has less fluid resistance than the fluid path (P2) between the wheel cylinder (30) and the first reservoir (26). The present invention further comprises two braking systems.

Abstract: A hydraulic braking device comprising a master cylinder and a brake booster. The braking device comprises a control piston driven by actuating a brake pedal and mounted so as to be tightly slidable in a plunger of a piston of the brake booster. The control piston comprises a first end portion having a certain cross-sectional area and being arranged to cooperate with a gasket so as to establish, during braking, a modulated communication between the first chamber of the brake booster and a discharge chamber of the master cylinder. The braking device has an effective cross-sectional area counter-acting a pressure existing in a region comprised between a master cylinder piston and the control piston. Such area is different from the cross-sectional area of the first end portion of the control piston.

Abstract: A brake system for a vehicle, the vehicle including a service brake control module and a parking brake with at least one spring brake chamber, the service brake control module controlling at least a first pressure module to brake a first set of wheels. The brake system comprises a parking brake control module configured to control the spring brake chamber to brake a second set of wheels and to control the first pressure module to brake the first set of wheels.

Abstract: The present invention relates to an adapter body for a brake application device of a vehicle braking system. The adapter body has a first bearing surface which is designed to bear against a bulkhead of a vehicle, and a second bearing surface which is designed to bear against the brake application device, wherein the first bearing surface and the second bearing surface are at a predetermined distance from one another. A receiving means for a portion of at least one fastening bolt for fastening the brake application device to a vehicle is configured in the adapter body.

Abstract: A brake system for a transportation vehicle and a transportation vehicle having such a brake system. The brake system includes two brake circuits which each have a control unit and a battery, wherein the respective control unit actuates two of a total of four service brakes and at least one of at least two electric parking brakes. The brake system also has an electronic circuit element. The brake system forms a defect signal in response to a double fault affecting the two brake circuits and when a defect in at least one of the control units is detected, and/or in which a respective supply voltage of at least one of the control units drops below a predefined limiting value. The at least one electronic circuit element actuates the electric parking brakes when a defect signal is formed.