686results about "Brake-by-wire" patented technology

A brake system includes a master cylinder generating pressure at first and second MC outputs for actuating first and second pairs of wheel brakes. A secondary brake module is configured to provide fluid at first and second PTU outputs for actuating the wheel brakes. The secondary brake module includes an electric motor configured to selectively pressurize the hydraulic fluid by transmitting rotary motion to at least two pump pistons. A pump inlet attenuator is interposed hydraulically between a reservoir and the pump pistons and in direct fluid connection with the reservoir via a single return line. An electronic control unit controls at least one of the secondary brake module and the master cylinder responsive to a brake pressure signal. The pump inlet attenuator regulates pressure in the single return line to reduce pressure fluctuations at an inlet side of each pump piston via solely mechanical pressure attenuation.

The invention provides a brake-by-wire method and system based on personalized feature learning and intention evolution prediction and a vehicle. The invention discloses a brake-by-wire method based on personalized feature learning and intention evolution prediction. The brake-by-wire method comprises the following steps: acquiring real-time braking operation information of a driver, current state information of a vehicle and driving environment information of the vehicle; personalized braking characteristic parameters of the driver are obtained or updated; predicting a current braking intention type of the driver by utilizing a preset driving intention recognition model integrated with an attention mechanism; predicting the evolution trend of the current braking intention in a preset future time window; determining a group of target braking characteristic parameters according to the predicted current braking intention type and evolution trend in combination with the current state information of the vehicle and the driving environment information of the vehicle; and a brake control instruction of the brake-by-wire system is dynamically adjusted. According to the invention, more intelligent, smoother and predictable line control brake is realized.

A brake system for a motor vehicle includes an electrohydraulic partial brake system, an electromechanical partial brake system, a redundant power supply, and an actuating device (124). The actuating device is configured to determine an actuation signal quantifying a brake request as a result of an actuation by a vehicle driver. The brake system includes a brake control unit (118) with at least two mutually independent partitions. Both partitions are each configured for controlling the electromechanical partial brake system and the electrohydraulic partial brake system on the basis of an actuating signal received from the actuating device.

A brake system includes a motor-driven master cylinder for generating brake actuating pressure at first and second MC outputs for hydraulically actuating pairs of wheel brakes. A secondary brake module is configured for selectively providing pressurized hydraulic fluid at first and second PTU outputs for actuating the first and second pairs of wheel brakes. A low pressure accumulator is interposed hydraulically between the first and second pairs of wheel brakes. The low pressure accumulator is in indirect fluid communication with the reservoir via the first and second MC outputs and the master cylinder. The low pressure accumulator at least partially provides slip control to the wheel brakes in coordination with the secondary brake module when the brake system is in the normal non-failure braking mode.

A brake system includes a reservoir and first and second motor-driven master cylinders. An electronic control unit is provided for controlling at least one of the first and second master cylinders responsive to at least one brake pressure signal. A secondary power transmission unit is configured for selectively providing pressurized hydraulic fluid at first and second PTU outputs for actuating first and second pairs of wheel brakes in at least one of a normal non-failure braking mode and a backup braking mode. Each of the first and second PTU outputs provides fluid to a corresponding one of the first and second pairs of wheel brakes. The secondary power transmission unit is directly fluidly connected to the reservoir.

A brake system includes a source of pressurized hydraulic fluid, a plurality of wheel brakes, and an iso / dump control valve arrangement associated with at least one wheel brake. A reservoir is connected to the source of pressurized fluid and to the iso / dump control valve arrangement. A fast-replenishing circuit includes a FR iso valve, a venting valve, and a replenishing check valve. The venting and replenishing check valves are interposed between the source of pressurized fluid and the reservoir. The FR iso valve is interposed between the source of pressurized fluid and the iso / dump control valve arrangement. When the source of pressurized fluid reaches a predetermined stroke position, the FR iso valve is energized to restrict movement of fluid from at least one iso / dump control valve arrangement to the source of pressurized fluid. The source of pressurized fluid is re-stroked to draw fluid from the reservoir through the replenishing check valve.

An electronic brake system and an operating method thereof are disclosed. Provided is an electronic brake system, according to the present embodiment, comprising: a first hydraulic pressure supply device for generating hydraulic pressure by means of an electric signal output in response to the displacement of a brake pedal; an oil pressure control unit including a first oil pressure circuit for controlling the hydraulic pressure of a first wheel cylinder and a second wheel cylinder, and a second oil pressure circuit for controlling the hydraulic pressure of a third wheel cylinder and a fourth wheel cylinder; and a second hydraulic pressure supply device which is connected between the first oil pressure circuit and the first and second wheel cylinders, and which generates hydraulic pressure by means of an electric signal if the first hydraulic pressure supply device and / or the oil pressure control unit malfunctions.

The present disclosure relates to an electronic brake system and an operation method thereof. The electronic brake system includes a reservoir in which a fluid is stored, a hydraulic pressure supply device configured to generate a hydraulic pressure by operating a hydraulic piston in response to a signal from a pedal displacement sensor detecting a displacement of a brake pedal, a hydraulic control unit including a first hydraulic unit configured to control the hydraulic pressure to be transferred from the hydraulic pressure supply device to a first hydraulic circuit including two wheel cylinders, and a second hydraulic unit configured to control the hydraulic pressure to be transferred from the hydraulic pressure supply device to a second hydraulic circuit including other two wheel cylinders.

A brake apparatus for a wheel of a vehicle, comprising a brake pad to generate a brake force when the brake pad engages a brake disc, the brake disc being associated with the wheel of the vehicle a brake actuator, which is adapted to move the brake pad towards the brake disc, and bring the brake pad into contact with the brake disc, therewith generating a requested brake force in response to a brake action request, a control unit configured to determine whether a brake action request is present, determine whether the vehicle is standing still, instruct the brake actuator to reduce the brake force with which the brake pad engages the brake disc when the control unit has determined that the brake action request is present and the control unit has determined that the vehicle is standing still.

A travel assistance method sets a target slip angle, estimates or detects an actual slip angle, sets a target braking / driving force by, when a sign of the vehicle body slip angle rotating in a turning direction of the vehicle is defined as positive and a sign of the vehicle body slip angle rotating in an opposite direction to the turning direction is defined as negative, correcting a required braking / driving force in such a manner as to increase a braking / driving force for a rear wheel or reduce a braking / driving force generated on a front wheel when the actual slip angle is larger than the target slip angle and correcting the required braking / driving force in such a manner as to reduce a braking / driving force for the rear wheel or increase a braking / driving force generated on the front wheel when the actual slip angle is smaller than the target slip angle.

An example braking control method is provided, including: obtaining a vehicle speed and a required braking force of a vehicle; determining a target braking force based on the vehicle speed and the required braking force; and determining a first execution braking force and a second execution braking force based on the target braking force, where the first execution braking force is provided through energy regeneration, and the second execution braking force is provided by a braking system. Further, a related apparatus is provided.

A electric brake system includes a main device that provides a first hydraulic pressure to a plurality of wheel cylinders respectively installed on a plurality of wheels, based on a position of a brake pedal; and art auxiliary device that provides a second hydraulic pressure to first and second wheel cylinders respectively installed on first and second wheels among the plurality of wheels based on the position of the brake pedal in a state in which the main device does not generate the first hydraulic pressure. The auxiliary device receives power from a power network different from that of the main device, and the auxiliary device controls at least one of first and second parking brakes respectively installed on third and fourth wheels among the plurality of wheels. In such an electric brake system, when the main device fails or is out of control, the auxiliary device may auxiliary generate the hydraulic pressure required for braking and may generate braking force using the parking brake.

To a first electronic control unit, three or more sensors excluding one predetermined sensor are connected. To a second electronic control unit, two sensors, which include one common sensor, of the three or more sensors, are connected. When the first electronic control unit does not determine that a sensor in a normal state is present among the three or more sensors, and the second electronic control unit determines that both of the two sensors are in the normal state, the electronic control unit controls the brake circuit based on the operation amount detected by at least one of the predetermined sensor or the common sensor.

The present invention relates to a redundant safety control system based on wire control braking, comprising an electric power-assisted braking mechanism and an electronic vehicle body stability system connected via at least two CAN buses, wherein the information transmitted by the two CAN buses is mutually backed up; the electric power-assisted braking mechanism and the electronic vehicle body stability system are also connected to a vehicle controller, a motor controller and an electronic parking system via one of the CAN buses. The fault risk identification and corresponding redundant safety control of the wire control braking system are realized, the strict requirements of intelligent vehicles for redundant braking safety are met, the braking safety of the vehicle is improved, and the loss of life and property caused by automobile traffic safety accidents is reduced.

A device for detecting a clamping force of a brake caliper of a vehicle braking system is provided. The device has a force sensor, a force transmitting element suitable for transmitting the clamping force exerted by the brake caliper to the force sensor, and a mechanical limit stop element. The force transmitting element is movable when subjected to the clamping force exerted by the brake caliper. The force sensor is configured to measure the clamping force up to a sensor force threshold value that is lower than a maximum clamping force exertable by the brake caliper. The mechanical limit stop element is configured to be engaged by the force transmitting element when the clamping force exceeds the sensor force threshold value.

Electrohydraulic actuator device for a motor vehicle brake system, comprising a cylinder housing, within which a pressure piston is displaced in a translational manner by a rotating threaded spindle, wherein the threaded spindle is driven via a transmission device by a rotor shaft of an electric motor, wherein the actuator device comprises an electronic unit, and a brake system for a motor vehicle having such an electrohydraulic actuator device and a pressure generator, a pressure modulation valve device for the wheel-individual generation of brake pressure at wheel brakes of the brake system, an electronic control device, which is designed for controlling the pressure generator and the pressure modulation valve device, and having a driver's brake actuation device.

A brake system and method for controlling a braking system comprises transmitting pedal-sensor data to a brake control unit, calculating preprocessing data with the brake control unit, transmitting the preprocessing data to a vehicle controller, calculating control information for at least one electromechanical wheel brake from the preprocessing data in the vehicle controller, and transmitting the control information for the electromechanical wheel brake to a brake control unit. The at least one brake control unit determines whether the control information received from the vehicle controller falls below a safety threshold before forwarding the control information to the at least one electromechanical wheel brake, and, overwrites the control information before forwarding to the at least one electromechanical wheel brake when the control information is below the safety threshold.

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 brake force control method includes: obtaining temperature data of a braking system of a vehicle and driving data of the vehicle during braking of the vehicle; and controlling a brake force output from a brake motor in the braking system according to the temperature data and the driving data.

A control method for a braking system of a vehicle is provided. The control method involves predetermining a clamping force threshold value detectable by a caliper sensor, identifying a defined caliper stiffness model, estimating a clamping force value using the caliper stiffness model, and generating an actuator control signal based on the estimated clamping force value.

A brake system may include a plurality of wheel speed sensors respectively installed in a plurality of wheels of a vehicle, a plurality of hydraulic brake modules related to braking of the plurality of wheels, and a first controller configured to perform braking control on the plurality of hydraulic brake modules in response to at least one of a pedal displacement signal, which corresponds to a movement of a brake pedal, and wheel speed signals outputted from the wheel speed sensors, in which when a failure of the first controller is identified, a second controller, which is provided in a steering system of the vehicle, performs braking control on an electronic parking brake, which is provided in at least one of the plurality of wheels, in response to at least one of an operating signal of an EPB switch, the pedal displacement signal, and the wheel speed signals outputted from the wheel speed sensors.

Examples provide systems and methods for performing hydraulic braking in a vehicle. One system includes a set of hydraulically controlled brakes, a set of valves coupled to the set of brakes and configured to modulate hydraulic pressure applied to the brakes, a first hydraulic system including a primary hydraulic pressure generator, and a first controller, and a second hydraulic system including a backup hydraulic pressure generator and a second controller. The first controller is configured to receive sensor data. Based on the sensor data, the first controller determines an amount of hydraulic pressure to apply to each of the hydraulically controlled brakes, transmits a pressure command to the primary hydraulic pressure generator for generating hydraulic pressure, and transmits, using a high speed communication connection a valve control command to the second controller.

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.

This application describes examples of a brake-by-wire system and a control method. In one example, a braking control system includes a brake master cylinder, a first pressure booster, a second pressure booster, at least one first interface, at least one first control valve, at least one second control valve, at least one third control valve, at least one fourth control valve, and a second pedal feel simulation system. The at least one first interface is connected to at least one brake wheel cylinder, respectively. The brake master cylinder and the at least one first interface are respectively connected through the at least one first control valve. The first pressure booster and the at least one first interface are respectively connected through the at least one first control valve. The second pressure booster and the at least one first interface are respectively connected through the at least one third control valve.

The present invention relates to an X-by-wire control system (2) of a motor vehicle for controlling a main function of the motor vehicle and a secondary function of the motor vehicle which is classified as having a lower safety standard compared to the main function, wherein the main function can be carried out by means of a main function assembly (4) of the motor vehicle and the secondary function can be carried out by means of a secondary function assembly (6) of the motor vehicle which is spatially separated from the main function assembly (4), and wherein at least one sensor (8, 9) of the secondary function assembly (6) is functionally assigned to the main function. characterized by that this sensor (8, 9) of the secondary function assembly (6), which is assigned at least one of the main functions, is connected to the main function assembly (4) on the one hand by power supply connection to supply this sensor (8, 9) with operating energy and on the other hand by signal exchange connection.

A brake system for a motor vehicle comprising a brake pedal having at least one pedal sensor for capturing a driver brake request using pedal sensor data. The brake system has four electromechanical wheel brakes, two brake control units, and a vehicle regulator. The brake control unit calculates preprocessing data from the pedal sensor data and makes the data available to the vehicle regulator via a signal connection. The vehicle regulator calculates control information for the wheel based on the preprocessing data. The brake system comprises two primary wheel brake modules which are each arranged on a vehicle wheel and in each case one of the electromechanical wheel brakes and one assigned brake control unit are integrated. The pedal sensor is connected to both brake control units via in each case one separate brake request signal line. A control method for such a brake system is also disclosed.

Provided are a control apparatus of a four-wheel independent control vehicle (10) and a method thereof. The control apparatus of a four-wheel independent control vehicle includes a plurality of wheels (21-24) each installed with a steering device (150), a driving device (160), and a braking device (170), and a processor (110) configured to, when a failure occurs in any one steering device of the plurality of wheels, determine a location of a failed wheel, calculate an insufficient cornering force of the failed wheel, and compensate for the insufficient cornering force by controlling at least one of the steering device, the driving device, and the braking device installed on each of the plurality of wheels. Even though a failure occurs in the steering device of any one wheel, traveling performance can be maintained by compensating for an insufficient cornering force.

The invention relates to a method for controlling a braking system in an emergency mode in the event of a malfunction, as well as to a braking system. The method comprises the steps of: transmitting (S1) a deceleration signal (6) to at least two actuator devices (3) of the braking system of a vehicle, wherein the at least two actuator devices (3) are each designed to build up a braking force for decelerating the vehicle; identifying (S2) a simultaneous malfunction in signal processing of the at least two actuator devices (3); and adapting (S3) an electronic signal transmission (5) between a central control unit (4) of the vehicle and at least one of the at least two actuator devices (3) such that the simultaneous malfunction is bypassed in order to build up the braking force.

A power transmission unit of a single-acting plunger type includes a ball screw, a ball nut driven by the ball screw, and a plunger piston coupled to the ball nut. A block housing at least partially encloses the plunger piston and the ball screw. A plunger chamber is at least partially defined by the block housing and a face of the plunger piston. The plunger chamber is selectively pressurized by reciprocal motion of the plunger piston with respect to the block housing driven by longitudinal motion of the ball nut. An electric motor selectively drives the ball screw to responsively reciprocate the plunger piston within the plunger chamber. A motor housing at least partially encloses the ball nut, the electric motor, and the plunger piston. The motor housing includes a block lip which is crimped to the block housing to maintain the motor housing in relation to the block housing.