214results about "ABS control systems" patented technology

A method for determining a p-V characteristic of at least one wheel brake cylinder of a brake system of a vehicle. The method includes: increasing a pressure prevailing in the wheel brake cylinder during a measurement time interval, wherein a volume variable that reflects a present volume in the wheel brake cylinder, and a pressure variable that reflects a present pressure in the wheel brake cylinder, are determined at least once during the measurement time interval, and setting the p-V characteristic of the wheel brake cylinder taking into consideration the volume variable and the pressure variable. Before the measurement time interval, during a pressure increase interval, a pressure exerted on the closed wheel inlet valve and / or the closed isolating valve is increased with an average pressure build-up gradient greater than or equal to 50 bar / second up to a limit pressure of greater than or equal to 25 bar.

A control method is for a braking system that includes an electronically controlled mechanical brake with a first motor and a second motor. The method includes detecting a pedal stroke and determining a total required braking torque based on a pedal stroke / total braking torque curve, distributing the total braking torque to the first motor and the second motor to determine a target torque for the first motor and a target torque for the second motor, and driving the first motor and the second motor to operate based on the target torques. The method further includes monitoring an operating current and a rotational speed of the first motor and the second motor, and using motor characteristic curves of the first motor and the second motor to calculate a first computed output torque and a second computed output torque.

A driving dynamics system for a vehicle may include at least one wheel brake for dissipative braking of a wheel of the vehicle; at least one braking unit associated with the at least one wheel brake and designed to generate a dissipative braking torque via the at least one wheel brake; at least one electric traction motor controllable to generate a regenerative braking torque for at least one wheel or axle of the vehicle; and a central control unit configured to control the at least one brake unit and the at least one electric traction motor for a braking function in combination such that a combined braking torque is generated by means of the at least one brake unit and the at least one electric traction motor. The braking function relates to simultaneous control of a basic braking torque and a controlled additional braking torque.

An integrated electronic brake system includes a main control section configured in a first area to receive one or more of a value from a pedal sensor, a value from a cylinder pressure sensor, a value from a wheel speed sensor, or an EPB signal to perform EPB control and drive a main braking valve and a braking motor for the main braking of a vehicle, and to drive an additional braking valve for the additional braking, a sub-control section configured in a second area to receive one or more of the value from the pedal sensor, the value from the wheel speed sensor, or the EPB signal to perform the EPB control and drive the main braking valve and the braking motor through a bypass circuit, and a connection bus connecting the first and second areas mounted in one box to transfer signals between the main and sub-control sections.

A valve assembly for a pneumatic system of a vehicle, in particular a commercial vehicle, including: an outlet valve assembly for venting the pneumatic system, a control device for operating the valve assembly in order to admit and release air to and from a pneumatic actuator, wherein the control device is configured to output, to the outlet valve assembly, a switching signal for switching the outlet valve assembly, and, via the switching signal, the outlet valve assembly can be switched to a noise-reducing first venting mode or a quick-venting second venting mode.

The disclosure relates to a leak detection system for a pneumatic braking system of a vehicle. The pneumatic braking system has a control unit, a pneumatic circuit, and an air tank configured to supply pneumatic pressure to the pneumatic circuit. The pneumatic circuit has a plurality of valves configured to be individually controlled by the control unit. The link detection system includes program code configured, when executed by a processor, to individually control the valves of the pneumatic circuit so as to isolate a sub-circuit of the pneumatic circuit. The leak detection module is configured to monitor a pressure in the pneumatic circuit for leaks, wherein the leak detection module detects a leak in the sub-circuit if the pressure decreases while the sub-circuit is isolated.

The invention relates to a driving dynamics system for a vehicle, comprising at least one wheel brake (RB1, RB2.RB3, RB4) for dissipatively braking a wheel of the vehicle; at least one brake unit (EMB, EHB) assigned to the at least one wheel brake (RB1, RB2, RB3, RB4) and configured to generate a dissipative braking torque by means of the at least one wheel brake (RB1, RB2, RB3, RB4); at least one electric traction motor (TM1, TM2, TM3, TM4) controllable to generate a regenerative braking torque for at least one wheel or axle of the vehicle; and a central control unit (M-ECU domain) which is configured to control the at least one brake unit (EMB, EHB) and the at least one electric traction motor (TM1, TM2, TM3, TM4) for a braking function in combination with one another such that a combined braking torque can be generated by means of the at least one brake unit (EMB, EHB) and the at least one electric traction motor (TM1, TM2, TM3, TM4).The braking function relates to a control case in which a basic braking torque and a controlled additional braking torque are controlled and / or regulated simultaneously; wherein optionally the basic braking torque is generated by the at least one braking unit (EMB, EHB) and the controlled additional braking torque is generated by the at least one electric traction motor (TM1, TM2, TM3, TM4); or the basic braking torque is generated by the at least one electric traction motor (TM1, TM2, TM3, TM4) and the controlled additional braking torque is generated by the at least one braking unit (EMB, EHB); or the at least one braking unit (EMB, EHB) and the at least one electric traction motor (TM1, TM2, TM3, TM4) each jointly generate the basic braking torque and the controlled additional braking torque.

A valve unit for an anti-lock braking system has a valve body, a piston, and an elastic element acting on the piston. The valve body has an outlet port, an inlet port, a primary chamber communicating with the outlet port, an expansion chamber with an outflow passage establishing fluid communication between the primary chamber and the expansion chamber, and a bypass passage between the inlet port and the outlet port. The piston is movable in the primary chamber and has a longitudinal through cavity, a first transversal surface facing the outlet port, and a second transversal surface facing away from the outlet port. The first transversal surface has an area smaller than the area of the second transversal surface. The elastic element exerts an elastic force to move the piston away from the outlet port. The valve unit is activatable by pressure of a brake fluid in the primary chamber.

A braking system for a motor vehicle has a plurality of hydraulic brake units for braking each braking one wheel of the motor vehicle and a first electric parking brake actuator for braking a first wheel and a second electric parking brake actuator for braking a second wheel. A first control device comprises a first hydraulic controller which is designed and set up to drive the plurality of hydraulic brake units. In order to ensure parking brake redundancy, the first control device has a driver for driving the first parking brake actuator. A second control device is also provided, which comprises a driver for driving the first parking brake actuator and a driver for driving the second parking brake actuator.

An all-terrain vehicle may include a frame and a plurality of ground-engaging members supporting the frame. The all-terrain vehicle may further include a powertrain assembly supported by the frame and shiftable transmission supported by the frame and operably coupled to the powertrain assembly. The all-terrain vehicle may also include a display, a back-up camera, and a controller supported by the frame. The controller may be configured to receive a signal from the shiftable transmission corresponding to the shiftable transmission being in a gear of the plurality of gears other than a reverse gear. Further, the controller may be configured to determine the all-terrain vehicle is moving backwards and send an activation signal to the back-up camera to display images of the back-up camera on the display.

A braking apparatus for a vehicle is disclosed herein. According to an embodiment of the present disclosure, a braking apparatus for a vehicle is provided, the apparatus including: a front wheel braking unit configured to brake a front wheel of the vehicle; a rear wheel braking unit configured to brake a rear wheel of the vehicle using an electro-mechanical brake; a main control unit configured to control the front wheel braking unit using hydraulic pressure and to transfer a braking command to the rear wheel braking unit; and an auxiliary control unit configured to enable redundancy control of the rear wheel braking unit, wherein the front wheel braking unit further comprises at least one electronic parking brake caliper disposed on the front wheel, and wherein the electronic parking brake caliper is connected to the auxiliary control unit and controlled by the redundancy control unit.

An electro-pneumatic central pressure control module, having at least two channels, implemented as a structural unit for an electro-pneumatic service brake of a vehicle, having at least two pressure control channels which are electrically controllable with regard to a brake pressure. A central electronic brake control device has a board, carrying electrical and electronic components, in which routines at least for controlling the brake pressure and for controlling the driving dynamics are implemented in the electrical and electronic components. At least one inertial sensor is arranged on or at the at least one board and is electrically conductively connected to at least several of the electrical and electronic components on the board so that the output signals of the at least one inertial sensor are integrated into the at least several electrical and electronic components for carrying out the control of the driving dynamics.

The invention relates to a method for determining a brake cylinder pressure in a pneumatic brake system of a utility vehicle, in which method the brake cylinder pressure (pBrkCyl) is estimated by means of a mathematical model. The invention relates to a method for reliably determining the pressure of a brake chamber without using a pressure sensor, according to the invention, the air mass flow () and the physical properties of the air in the chamber (13) of the brake cylinder (6, 7) are adjusted by means of the open or closed state of an electronically controllable solenoid valve (10, 11) arranged directly in front of the brake cylinder (6, 7) in the air supply line (4, 5) outside the control device (2) for the brake cylinder pressure (pBrkCyl). The brake cylinder pressure (pBrkCyl) is continuously determined taking into account a currently predetermined open or closed state of the solenoid valve (10, 11).

A running gear assembly for a vehicle includes an inner flange, an optional brake member assembly, and a unit hub. The inner flange may be connected to either an axle or an independent suspension member. The brake member assembly—when present—may be any type of brake member assembly commonly used for vehicles, including—but not limited to—electrically, hydraulically, or mechanically actuated drum brakes and hydraulically actuated disc brakes. The unit hub allows the wheel and tire assembly to connect to the vehicle without the need for a spindle.

The invention relates to a method for determining a flow resistance variable (RLi) in a brake system having an axle modulator (2) with:-an axle modulator inlet valve (14) for applying compressed air to a pressure line (15) connected to a working connection (2a),-an axle modulator outlet valve (8) for applying compressed air to a pressure line (15) connected to a working connection (2a), -a pressure sensor (12) for venting the pressure lines (15), and-a pressure sensor (12) for ascertaining a pressure value (pW) associated with the respective pressure line (15); and a service brake (7) coupled to the pressure line (15), comprising the following steps: ascertaining a first pressure value by means of the pressure sensor (12) when the axle modulator (2) is connected to the service brake (7) in a pressure-conducting manner and the axle modulator (2) is brought into a pressure-holding position; -generating a pressure pulse in the pressure line (15) at a first point in time; determining a second pressure value by means of the pressure sensor (12) at a second point in time after the generation of the pressure pulse; and determining a flow resistance characteristic variable of a flow path for propagating the generated pressure pulse within the brake system as a function of the change over time of the second pressure value relative to the first pressure value.

A method is for determining a flow resistance characteristic variable in a brake system with an axle modulator having a pressure sensor for determining a pressure value allocated to a pressure line; and, a service brake connected to the pressure line. The method includes determining a first pressure value via the pressure sensor while the axle modulator is connected to the service brake in a pressure-conducting manner and the axle modulator is brought into a pressure maintaining position; generating a pressure pulse in the pressure line at a first time; determining a second pressure value via the pressure sensor at a second time after generation of the pressure pulse; and, determining a flow resistance characteristic value for a flow path within the brake system wherein the generated pressure pulse propagates, depending on a change over time of the second pressure value with respect to the first pressure value.

Disclosed herein is an emergency braking system using an electronic parking brake according to the present disclosure, in which the emergency braking system is configured to provide an emergency braking using an electronic parking brake (EPB) in case of total or partial failure of a main braking system, and includes: an EPB actuator configured to apply an emergency braking force to a wheel; a slip detection unit configured to detect a wheel slip on the wheel equipped with the EPB actuator; an EPB control unit configured to determine a road surface condition by calculating a slip ratio through slip information transmitted from the slip detection unit, and to control an operation of the EPB actuator based on the road surface condition.

A one-side brake control system and method perform distribution of torques between front and rear wheels. The one-side brake control system includes a target steering angle input unit to which a target steering angle of a driver or a controller of an autonomous vehicle is input when a steering system fails, an integrated Electronic Control Unit (ECU) configured to calculate a target moment of the vehicle according to the target steering angle input through the target steering angle input unit and calculate brake torques of a one-side front wheel and a one-side rear wheel of the vehicle based on the target moment, and a braking ECU configured to control one or more braking actuators of the one-side front wheel and the one-side rear wheel of the vehicle according to the brake torque of the front wheel and the rear wheel transmitted from the integrated ECU to perform one-side brake.

An ABS device for a hydraulic braking system of a bicycle or motorcycle, in particular for bicycles, comprises an electrically actuated valve unit (13) which is switchable between a first operating state in which a master cylinder (2) associated with a brake lever is in contact with an actuating cylinder (3) of a brake device and a second operating state in which the connection is interrupted and the actuating cylinder (3) of the brake device is in contact with a fluid accumulator (9).An electronic control (E) is designed to control the position of the moving element (11) of the fluid accumulator (9) both during activation of the ABS function and during deactivation of the ABS function in order to effect: a non-abrupt, but progressive, change in the pressure (CP) in the line (8) connected to the actuating cylinder (3) of the brake device (F), as a function of the rotational speed (ω) of the wheel (R1) to which the brake device is assigned, and as a function of a second parameter, which is the pressure (CP) in the actuating cylinder (3) of the brake device or the deceleration of the vehicle, which is detected or calculated from a sensor assigned to the vehicle.

To provide an improved brake system.SOLUTION: The invention relates to a brake system comprising: an actuating device, in particular a brake pedal; a first piston-cylinder unit having two pistons subjecting the brake circuits to a pressure medium via a valve device, where one of the pistons can be actuated by the actuation device; a second piston-cylinder unit having an electric motor drive, a transmission, and at least one piston to supply at least one of the brake circuits with a pressure medium via a valve device; and a motor pump unit with a valve device to supply the brake circuits with a pressure medium, also comprising a hydraulic stroke simulator with a pressure or working chamber which is connected to the first piston-cylinder unit.SELECTED DRAWING: Figure 1

A method for controlling a vehicle brake system of a heavy duty vehicle, the brake system comprising a service brake system and an electrical machine brake system. The method includes determining a total brake torque request for braking a wheel of the vehicle, obtaining a brake torque capability of the electrical machine, determining if the total brake torque request exceeds the brake torque capability of the electrical machine, and if the total brake torque request exceeds the brake torque capability of the electrical machine but is below a threshold level, applying a baseline brake torque by the service brake system, wherein the baseline brake torque is configured to compensate for a difference between total brake torque request and brake torque capability of the electrical machine, and controlling wheel slip by the electrical machine brake system.

A method for controlling a braking system of a vehicle for the distribution of braking forces for parking the vehicle involves receiving, by a system for controlling the braking system, a first piece of information representative of a first working temperature of a first vehicle front axle, a second piece of information representative of a second working temperature of a second vehicle rear axle, a third piece of information representative of a gradient of the vehicle, a fourth piece of information representative of a coefficient of friction between the vehicle and a road, and a fifth piece of information representative of a weight of the vehicle, and determining a first target braking force to be applied to the first front axle and a second target braking force to be applied to the second rear axle based on the first, second, third, fourth and fifth pieces of information.

Air preparation unit (102) for a brake system (100) of a commercial vehicle, wherein the air preparation unit (102) has the following features: a foot brake module connection (114) for pneumatic or electrical and pneumatic coupling of the air preparation unit (102) with a foot brake module (116) of the brake system (100); at least one valve unit (110) for applying a control pressure to the foot brake module connection (114) for actuating the foot brake module (116); and a control unit (118) for controlling the valve unit (110), characterized by the fact that wherein the control unit (118) is coupled or can be coupled to at least one wheel speed sensor (122) of the commercial vehicle and is configured to control the valve unit (110) and / or at least one control valve (126; 200) of an anti-lock braking system of the commercial vehicle using a wheel speed sensor signal (124) generated by the wheel speed sensor (122) and wherein the control unit (118) is configured to read / tap speed signals from the same sensor which supplies speed signals to an ABS / or EBS system of the commercial vehicle.

The invention discloses an intelligent anti-lock braking control method, system and device and a storage medium, and relates to the technical field of vehicle active safety. The method comprises the following steps: acquiring multi-source sensor data by using a multi-source sensor module, and estimating the slip rate according to the multi-source sensor data; constructing a fuzzy rule base, and predicting an environment friction coefficient and a friction extreme value; and the prediction result is corrected in combination with the environment friction coefficient, the wheel speed, the vehicle acceleration, the suspension displacement and the yaw velocity, and the actual friction coefficient is obtained. And then threshold value control is conducted according to the environment friction coefficient, the friction extreme value and the actual friction coefficient, and a brake pressure control scheme is determined. The adaptive capacity to the dynamic environment can be improved, and preventive control is achieved.

A driving dynamics system for a vehicle may include a primary control unit for detecting and / or generating steering commands and braking commands; a brake system having first and second electrohydraulic pressure supply units; four hydraulically actuatable wheel brakes of respective wheels; electrically actuatable brake pressure adjustment valves; and an electric steering actuator for actuating at least one axle. The driving dynamics system may implement a steering command during normal operation to actuate at least one of the pressure supply units and the steering actuator and / or, to implement a braking command during normal operation, to actuate at least the second pressure supply unit and at least the brake pressure adjustment valves for a wheel-specific pressure adjustment and, in a fault case, to actuate at least the first pressure supply unit and at least the brake pressure adjustment valves for a wheel-specific pressure adjustment.

An accumulator cover for an accumulator for an anti-lock brake system includes a porous body part that closes one open side of a cylindrical space of the accumulator and includes a plurality of micropores through which gas passes, wherein a piston is installed to be reciprocally movable in the cylindrical space. The accumulator cover also includes a body coupling part connected to the porous body part and coupled to a body of the accumulator in which the cylindrical space is disposed. A method for manufacturing the accumulator cover is also provided.

The invention relates to a brake device for a hydraulic brake system of a vehicle, comprising a piston (10) adjustable in a storage volume (12) dividing the storage volume (12) into a first partial volume (12a) and a second partial volume (12b), a system-specific or system-external brake cylinder (16) is coupled or can be coupled to the first partial volume (12a) and a system-specific or system-external wheel brake cylinder (18) is coupled or can be coupled to the second partial volume (12b), and further comprising a bypass line (20), a non-return valve (22) arranged in the bypass line (20) being switchable by the piston (10) such that the non-return valve (20) is in an open state at least when the piston (10) is in a normal position and is switched to a closed state by the piston (10) being adjusted by at least a minimum adjustment distance from the normal position. Furthermore, the invention relates to a method for operating a hydraulic brake system of a vehicle.

The application discloses a vehicle control method and device and a storage medium. The method comprises the following steps: in response to receiving a plurality of wheel speed signals sent by a vehicle when the vehicle is driving on a road surface, determining whether there is an abnormal wheel speed signal in the plurality of wheel speed signals based on the driving state of the vehicle; in response to the presence of the abnormal wheel speed signal in the plurality of wheel speed signals, determining whether to control a target tire corresponding to the abnormal wheel speed signal not to be in contact with the road surface based on the type of the abnormal wheel speed signal; in response to controlling the target tire corresponding to the abnormal wheel speed signal not to be in contact with the road surface, adjusting an initial control parameter of the vehicle based on a current driving parameter of the vehicle to obtain a target control parameter; and controlling the vehicle to drive based on the target control parameter. The application solves the technical problem that the vehicle control process is relatively complex in the related art.

An electrically insulated cable comprising: a core electric wire; a tape member covering the core electric wire; and a covering layer covering the tape member, wherein: the core electric wire includes a plurality of insulated electric wires; the insulated electric wires each include a conductor and an insulating layer covering the conductor; the tape member is a film; and the tape member has a breaking elongation of 50% or less.

The invention relates to an electropneumatic service brake device (1) for a vehicle, at least comprising: at least one first pneumatic service brake cylinder (BZ1) that can be acted on by a first service brake pressure (p1), and at least one second pneumatic service brake cylinder (BZ2) that can be acted on by a second service brake pressure (p2), a foot brake actuator (5), a pneumatic foot brake valve device (FBV; FBM) for generating a first control pressure (Stp1) and a second control pressure (Stp2) depending on an actuation of the foot brake actuator (5), an electronic service brake control (EBS-ECU), which is designed and configured to generate, depending on an electrical brake request signal, an electrical control signal which represents a target service brake pressure, a first electropneumatic solenoid valve device (2C-EVO), which is provided and designed to be electrically controllable by the electrical control signal or pneumatically controllable by the first control pressure (Stp1), a second electropneumatic solenoid valve device (FAM), which is controlled by the electronic service brake control (EBS-ECU) and designed to generate the second service brake pressure (p2) for the at least one second service brake cylinder (BZ2). According to the invention, the second electropneumatic solenoid valve device (FAM) is designed differently from a pressure control module, such that the second service brake pressure (p2) for the at least one second service brake cylinder (BZ2) can be generated in a plurality of operating modes, which ensure redundant generation of the second service brake pressure (p2) and stability control and / or driving dynamics control.