109results about "Failsafe aspects" patented technology

The method comprises the following steps: judging whether each wheel clamping force sensor works normally, if so, directly obtaining a brake clamping force as a final brake clamping force, if not, obtaining a first brake clamping force through a motor model, and if not, obtaining a second brake clamping force through a motor model; second brake clamping force is obtained through the brake friction plate model, and fusion is conducted through the fuzzy logic weight algorithm to obtain final brake clamping force; judging whether the wheel has a locking risk or not, if not, calculating the current ground longitudinal force of the wheel according to a kinetic model of the wheel, if so, triggering longitudinal force locking logic, and acquiring the current locking ground longitudinal force as the current ground longitudinal force of the wheel; calculating the current utilization adhesion coefficient of each wheel in combination with the vertical force; and determining the road surface type of the vehicle by using a fuzzy rule based on the adhesion coefficient of each wheel. According to the invention, the problem of low identification precision is solved.

A brake system for a vehicle may include at least two hydraulic brake circuits, each having at least one hydraulically acting wheel brake, at least two pressure supply devices, each of which is driven by an electromotive drive, at least one valve assembly having valves for the wheel-individual adjustment of brake pressures and / or for separating the wheel brakes from, or connecting same to, a pressure supply device, at least one electronic control and regulating unit, one of which is a superordinate central control unit that controls individual control and regulating units of the components of the brake system, as well as at least one additional electric drive motor for at least one axle or wheel of the vehicle. The brake system may use the at least one pressure supply device and / or the at least one electric drive motor for controlling pressure in at least one wheel brake for steering interventions.

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.

A sticking detection method and apparatus for an electronic park brake system, and a device and a vehicle. The method comprises: in response to a caliper clamping instruction, controlling an electric motor of an electronic park brake system to rotate in a first direction, so as to control a caliper of the electronic park brake system to perform a clamping action; measuring a load current of the electronic park brake system during the process of the caliper performing the clamping action, so as to obtain a first load current; when the first load current reaches a first current threshold value, performing sticking detection on the caliper and the electric motor, so as to obtain a sticking detection result, wherein the sticking detection result is used for indicating whether the electronic park brake system has a clamping sticking anomaly; and when the sticking detection result indicates that the electronic park brake system has a clamping sticking anomaly, determining that the electronic park brake system is abnormal. The method effectively improves the accuracy of fault detection for electronic park brake systems.

The invention relates to a brake system and a method of controlling the brake system. The brake system includes a sensor module including a motor current sensor and a force sensor, electromechanical brake units respectively mounted on wheels of a vehicle and including a motor, and a controller configured to control one or more of the electromechanical brake units; the controller is configured to: predict a state of the motor of the electromechanical brake unit based on a current signal of the motor detected by the motor current sensor, when at least one predicted state of the motor indicates that at least one of the motors is faulty, determine whether the motor is faulty; determining a fault level of the at least one failed motor based on sensor data obtained from the sensor module, calculating a requested torque for each of the wheels based on the determined fault level of the at least one failed motor, the torque of each of the wheels is controlled based on the calculated requested torque of each of the wheels.

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.

The invention relates to an electromechanical braking system (1) for a motor vehicle, comprising four wheel brake devices (2), four primary electric motors (3), four secondary electric motors (4), four control devices (5) and one backup control device (8). The braking system (1) according to the invention is characterized in that the control devices (5) and / or the backup control device (8) are configured to detect and / or evaluate sensor data of sensors (6) assigned to the wheel brake devices (2) and / or to the motor vehicle, a primary electric motor (3) and a secondary electric motor (4) are respectively assigned to each of the wheel brake devices (2) for operating the respective wheel brake device (2), and each of the control devices (5) is respectively assigned to the primary electric motor (3) of one of the wheel brake devices (2) and the backup control device (8) is respectively assigned to the four secondary electric motors (4) of the wheel brake devices (2) for driving the electric motors (3, 4).

Disclosed herein are an electromechanical brake system and a control method thereof. In accordance with one aspect of the present disclosure, there is provided an electromechanical brake system including electromechanical brakes respectively provided on four wheels of a vehicle, a sensor part that outputs a signal which corresponds to or is capable of estimating whether each of the electromechanical brakes is normal and a driver demand braking torque generated based on the speed and lateral acceleration of the vehicle and a brake pedal operation of a driver, and a controller that estimates a demand braking torque based on the signal received from the sensor part and determines whether the electromechanical brakes are normal, wherein the controller performs a braking control as much as the demand braking torque based on the determination that the electromechanical brakes are normal, and performs a braking control by distributing, within a range of the demand braking torque, braking torques based on the lateral acceleration of the vehicle to the respective other electromechanical brakes except the electromechanical brake determined to malfunction based on the determination that there is a malfunction of any one among the electromechanical brakes.

A braking device for a vehicle with increased operating safety and to a method for operating a braking device for a vehicle with increased operating safety is described. The proposed braking device comprises a container with a cavity, a hydraulic block and an electronic brake control device that is configured to control the pressure supply device. The brake control device is arranged in the container. Furthermore, at least one sensor element that is designed to detect a fluid is provided.

The application relates to the technical field of automobile control, in particular to a control method, device and equipment of a three-chip redundant automobile brake controller, the automobile brake controller comprising a main controller, a first auxiliary controller and a second auxiliary controller, wherein the method comprises the following steps: detecting a current working state of the main controller; judging whether the current working state meets preset failure conditions; if the current working state meets the preset failure conditions, performing brake control on the automobile based on the first auxiliary controller and / or the second auxiliary controller, otherwise, performing brake control on the automobile based on only the main controller. Thus, the problem that vehicle functions cannot be maintained when a key chip of a brake system fails is solved, redundancy backup is realized, safety and reliability are increased, and the chip resource requirement for the auxiliary chip is reduced.

The present application relates to the technical field of braking system, in particular to a double-redundant single-axis electro-hydraulic braking system and control method. The double-redundant single-axis electro-hydraulic braking system is characterized in that: the brake fluid storage pot is a two-cavity brake fluid storage pot or a three-cavity brake fluid storage pot, the brake fluid storage pot comprises a first storage cavity, a second storage cavity and a third storage cavity, the first storage cavity is connected with a left brake control mechanism, the second storage cavity is connected with a right brake control mechanism, the left brake control mechanism and the right brake control mechanism are connected through a plurality of balance valves, and the plurality of balance valves are connected in parallel. Compared with the prior art, the redundancy mode of the brake control mechanism, the electromagnetic valve and the balance valve is increased, the working mode is not a single switching and starting mode, but a free and flexible replacement working mode according to the failure condition, which greatly increases the redundancy control condition of the braking system in response to various failure conditions.

An object of the present invention is to provide a vehicle brake system capable of executing an antilock brake control even when a hydraulic pressure control device is not operated. The hydraulic pressure generating device 1 includes master cut valves 7a, 7b for opening and closing a main hydraulic passage leading from a master cylinder 10 to a hydraulic pressure control device 2, communication passages 3a, 3b leading from a slave cylinder 30 to the main hydraulic passage 1a, 1b, shut-off valves 8a, 8b, for opening and closing the communication passages, and a control device 4. The control device 4 is configured to generate brake hydraulic pressure from the slave cylinder 30 when the hydraulic pressure control device 2 is not operated, and to perform antilock brake control by controlling the master cut valves 7a and 7b and the shut-off valves 8a and 8b for each of the first main hydraulic passage 1a and the second main hydraulic passage 2b according to a slip state of the wheel.

The invention relates to a redundancy valve assembly (1) for redundantly supplying a redundant brake pressure (p2) into a service brake pressure path (40) of an electronically controllable pneumatic braking system (204) for a vehicle (200), preferably a utility vehicle (200), comprising a service brake pressure connection (4) for receiving a service brake pressure (p1) from a service brake pressure modulator (142); a redundancy brake pressure connection (6) for receiving a redundancy brake pressure (p2) from a redundancy brake pressure modulator (142), and a brake actuator connection (8) for connecting at least one brake actuator (207). The redundancy valve assembly (1) is electrically actuatable in order to optionally modulate the service brake pressure (p1) or the redundancy brake pressure (p2) at the brake actuator connection (8). The invention also relates to an electronically controllable pneumatic braking system (204), to a vehicle (200) and to a method.

A controller, system and method for allowing failover between an autonomously controlled braking system and a human controlled braking system in a truck having pneumatic brake lines is provided. A cab-mounted brake actuator is arranged to be handled by the human operator and is arranged to selectively deliver pressurized air to truck brakes and a trailer brake air supply. A controller performs autonomous braking operations in response to control inputs and senses when a human operator is handling the actuator. A plurality of valves, interconnected between a pressurized air source on the truck, the actuator, the truck brakes and the trailer brake air supply, are responsive to the controller, and are arranged to override selective delivery of pressurized air to the truck brakes of the truck and the trailer brake air supply in response to the autonomous braking operations in favor of selective delivery of pressurized air via the actuator.

A system (200) is described for verifying a braking release condition by braking means (201) of at least one vehicle (V), particularly at least one railway vehicle, comprising: braking control modules (202), a control means (204), a first communication means, and a second communication means distinct from the first communication means. The control means (204) is arranged to actuate at least one signaling means (210) when it is receiving, from all the braking control modules (202), respective messages of successful braking release through at least one of the first and second communication means (206, 208). An additional system (200) is also described for verifying a braking release condition by braking means (201) of at least one vehicle (V), particularly at least one railway vehicle, wherein the control means (204) is arranged to actuate at least one signaling means (210) when it determines that all braking control modules, through at least one of the first and second communication means (206, 208), are transmitting respective applied braking force messages indicating a released braking condition.

The present invention relates to a vehicle redundant braking system and vehicle, and relates to the technical field of autonomous driving vehicles. The system includes: a first controller, a second controller, a first braking module, and a second braking module. The main controller is connected to the first controller via a first communication link, the main controller is connected to the second controller via a second communication link, the first controller, the second controller, and the first braking module are all connected via a third communication link; and the first controller and the second controller are both connected to the second braking module. The main controller, the first communication link, the first controller, the third communication link, and the first braking module are the main braking link. If any single point or multiple points on the link fail, the control mode is switched to redundant braking. The redundant braking system of the present invention does not require additional redundant braking components, which can reduce hardware costs.

The present invention discloses an electric parking brake control device capable of accurately determining operation of an electric actuator . The electric parking brake control device is capable of performing an application process for controlling the electric actuator to move in the direction in which a friction member is pressed against a rotation body that rotates integrally with a wheel and a release process for controlling the electric actuator to move in the direction in which the friction member is moved away from the rotation body. Even upon receiving (time t12) a new operation request for operating the electric actuator during a period (time t1 to t5) from the start of the application process or the release process to the completion of the process, the electric parking brake control device does not change the operation of the electric actuator on the basis of the operation request.

An actuator for a parking brake is disclosed. According to one aspect of the disclosure, an actuator for a parking brake comprises a motor that generates a force; a reduction gear section configured to transmit the force of the motor to a locking section that implements a parking brake application of a vehicle; a housing in which the motor and the reduction gear section are accommodated; a housing cover by which the housing is closed; and a locking section configured to limit the rotation of the reduction gear section.wherein the locking section is formed by a locking element provided in such a way that it is movable in an axial direction of the reduction gear section and is in close contact with or spaced apart from the reduction gear section, an elastic element that elastically supports the locking element towards the reduction gear section, and an electromagnetic element designed to separate the locking element from the reduction gear section by generating an electromagnetic force when current is applied.

The embodiment of the invention provides a leakage isolation method and device for a hydraulic braking system, relates to the technical field of vehicle braking and is suitable for an electronic stability control system, the hydraulic braking system comprises a plurality of braking loops, and the method comprises the steps that it is determined that brake fluid leakage happens to the hydraulic braking system; based on a preset braking method, the multiple braking circuits are subjected to leakage testing, the testing result of each braking circuit is obtained, the preset braking method is used for simulating vehicle braking through the braking circuits to be tested, and the testing results are used for representing whether braking fluid leakage happens to the corresponding braking circuits or not; and when the vehicle is braked, based on the test results of all the brake circuits, the brake circuits with leakage are isolated, so that the brake circuits with leakage do not participate in vehicle braking. By the adoption of the method, when the hydraulic brake system leaks brake fluid, the leakage point can be isolated in time, the remaining effective brake loop is used for braking, and the brake performance of a vehicle is guaranteed.

Braking system for a vehicle, comprising: a pedal (101) to which a brake input is applied; an actuator part configured to generate a brake hydraulic pressure in response to the brake input applied to the pedal (101), and comprising a first actuator with a first hydraulic chamber (131) and a second actuator with a second hydraulic chamber (132); Wheel brakes (136, 137) connected to the first actuator and the second actuator; and an auxiliary cylinder (105) with two auxiliary pistons (108, 109) for forming a third hydraulic chamber (106) and a fourth hydraulic chamber (107), which are two hydraulic chambers that are continuously arranged in a housing; wherein the auxiliary cylinder (105) has a first centrally arranged auxiliary piston and a second auxiliary piston connected to the pedal (101), and wherein the first hydraulic chamber (131) is connected to the third hydraulic chamber (106) by a flow path (112, 121) in which a first valve (119) is installed, the second hydraulic chamber (132) is connected to the fourth hydraulic chamber (107) by a flow path (122, 115) in which a second valve (120) is installed, and pressure equalization is performed by the auxiliary cylinder when a difference occurs between the hydraulic brake pressures generated by the first actuator and the second actuator, wherein the fourth hydraulic chamber (107) is connected to a first flow path (115) adjacent to the first auxiliary piston (108) and to a second flow path (116), and wherein the first flow path (115) and the second flow path (116) are connected to the second valve (120), wherein the first auxiliary piston (108) separates the third hydraulic chamber (106) and the fourth hydraulic chamber (107), and wherein, when the flow path through the first auxiliary piston (108) is closed by the pressure difference between the third hydraulic chamber (106) and the fourth hydraulic chamber (107), the braking force is transmitted through the second flow path (116) to the second hydraulic chamber (132).

A method for leak testing an electric brake system, comprising: a master cylinder (20) connected to an oil-storing reservoir (30) and configured to generate hydraulic pressure corresponding to a pedal force of a brake pedal (10); a simulation device (50) one side of which is connected to the master cylinder (20) to provide a reaction force corresponding to the pedal force of the brake pedal (10), and the other side of which is connected to the reservoir (30); a simulation valve (54) provided in a flow path connected to the master cylinder (20) or a flow path connected to the reservoir (30); a device (100) for supplying hydraulic pressure, actuated by an electrical signal from a pedal position sensor that detects a displacement of the brake pedal (10) and configured to generate hydraulic pressure; and a hydraulic pressure control unit (200) configured toto control the hydraulic pressure delivered by the main cylinder (20) and / or the device (10) for supplying hydraulic pressure, and to supply the hydraulic pressure to a wheel cylinder (40) provided at each wheel, comprising: , Performing a test mode to test for leakage of the simulation valve (54) and a sealing element (23) provided within a chamber of the main cylinder (20) by providing an inspection valve (60) in the flow path connecting the main cylinder (20) to the container (30), wherein the test mode includes: (a1) Closing a shut-off valve (261, 262) provided on a flow path connecting the main cylinder (20) to the hydraulic pressure control unit (200) when the inspection valve (60) is open; (b1) Applying a vacuum to a piston located in the master cylinder (20) according to a pedal force of the brake pedal (10) and detecting whether pressure is built up via a pressure sensor (PS1); and (c1) Determine that no leakage exists if the pressure detected via the pressure sensor (PS1) meets a certain criterion.

An electromagnetic device (120) for a braking system for a vehicle is presented. The electromagnetic device (120) has an armature (221) made of a magnetizable material. The electromagnetic device (120) also has a bush (222). The armature (221) can be at least partially received within the bush (222). The electromagnetic device (120) also has a first winding assembly (224) having at least one winding of an electrical conductor (223) around the bush (222) and having two first electrical terminals (225, 226). Furthermore, the electromagnetic device (120) has a second winding assembly (227) having at least one winding of an electrical conductor (223) around the bush (222) and having two second electrical terminals (228, 229). The first winding assembly (224) and the second winding assembly (227) are galvanically isolated from one another. An inductive coupling can be produced between the first winding assembly (224) and the armature (221) and between the second winding assembly (227) and the armature (221).

The invention discloses a brake failure switching fault-tolerant control method and system, a vehicle and a medium, and relates to the technical field of vehicle brake control. The method comprises the steps that the failure mode of a brake actuator is determined; constructing a sliding mode surface based on the actual motion parameters of the vehicle and the vehicle reference model, and calculating an additional yawing moment required for maintaining the stability of the vehicle through a sliding mode surface control law; a switching strategy is determined according to the vehicle longitudinal speed and the expected braking strength, and the target braking strength is determined based on the switching strategy; the switching strategy comprises a conventional switching mechanism and a compliant switching mechanism; the compliant switching mechanism is used for gradually approaching the expected braking strength in the switching process; and under the constraint of the failure mode, the actual braking force of each wheel is determined according to the target braking strength and the additional yawing moment, and a braking actuator is controlled to execute the actual braking force. By the adoption of the method, stable and reliable braking force switching can be achieved under the condition that the braking actuator fails, and the stability and riding comfort of the vehicle are improved.

The invention relates to a method for operating a vehicle, in particular a motor vehicle (2), using a pedal device (3), in particular a brake pedal device. The pedal device (3) has at least one displaceable pedal (5) and at least two sensors (6, 7) for detecting an actuation of the pedal (5). A driver request is determined on the basis of an output signal of at least one of the sensors (6, 7), wherein in order to detect a malfunction of the pedal device (5), the output signals of the two sensors (6, 7) are compared with each other, and if a malfunction is detected, the vehicle is brought into a safe state. According to the invention, after the safe state has been achieved, instructions for carrying out a functional test of the pedal device (3) are output to a driver of the vehicle in particular.

Provided is a vehicle brake system capable of executing anti-lock brake control even when a hydraulic pressure control device is not operating. A hydraulic pressure generation device (1) is provided with master cut valves (7a, 7b) that open and close main hydraulic pressure paths (1a, 1b) leading from a master cylinder (10) to a hydraulic pressure control device (2), communication paths (3a, 3b) that lead from a slave cylinder (30) to the main hydraulic pressure paths (1a, 1b), cutoff valves (8a, 8b) that open and close the communication paths (3a, 3b), and a control device (4). When the hydraulic pressure control device (2) is not operating, the control device (4) causes brake fluid pressure to be generated from the slave cylinder (30) and controls the master cut valves (7a, 7b) and the cutoff valves (8a, 8b) for both the first main hydraulic pressure path (1a) and the second main hydraulic pressure path (1b) in accordance with wheel slippage to perform anti-lock brake control.

The invention relates to a braking system, comprising: - at least two wheel brake cylinders (RZ1-4), which are each part of respective separate wheel circuits (RK1-4), - at least one pressure supply (DV), which is used at least for the pressure build-up (pauf) in the wheel brake cylinders (RZ1-4), - at least one reservoir (VB), - at least one electronic open-loop and closed-loop control device (ECU), - switching valves (SV2K1-4), each wheel brake cylinder (RZ1-4) being connected, by means of an associated hydraulic connecting line, to a switching valve (SV2K1-4), which is used to disconnect and connect the hydraulic connection between the wheel brake cylinder (RZ1-4) in question and at least one additional hydraulic main line (), by means of which the switching valve (SV2K1-4) can be or is connected at least to the pressure supply (DV), the hydraulic connecting line and the wheel brake cylinder (RZ1-4) connected thereto being part of a wheel circuit (RK1-4), characterized in that the leakage of each of the individual wheel circuits (RK1-4) is diagnosed and in that, in accordance with the diagnosis results, an electronic open-loop and closed-loop control device (ECU) decides whether a wheel circuit (RK1-4) is switched off by means of permanent closure of the associated switching valve (SV2K1-4) or continues to be operated to produce a braking effect.

The present disclosure relates to an electronic control apparatus including a housing, first and second controllers which are accommodated in the housing and control a motor, first and second internal transceivers provided the first controller, third and fourth internal transceivers provided in the second controller, first and second connectors which pass through opposite sides of the housing and are connected to the second and fourth internal transceivers respectively, first internal communication network connecting the first and third internal transceivers, and second internal communication network connecting the second and fourth internal transceivers outside the housing, and a brake apparatus including the same.

A method of determining the integrity of an electric or hydraulic energy source of a braking control system. The energy source is charged or discharged, and two or more measurements of voltage or hydraulic pressure are taken from the braking control system. A difference between at least two of the measurements is determined in order to determine a change or rate of change in voltage or hydraulic pressure caused by the charging or discharging of the energy source. The integrity of the energy source is determined by checking whether the change or rate of change in voltage or hydraulic pressure meets predetermined criteria. The check may comprise comparing the change or rate of change of the voltage or hydraulic pressure to a threshold - for instance checking whether the change exceeds a threshold, or falls between an upper threshold and a lower threshold.

The application discloses a road surface feature recognition method based on an electromechanical brake vehicle, and comprises the following steps: determining whether each wheel clamping force sensor is normally working; if the sensor is normally working, directly obtaining the brake clamping force as the final brake clamping force; if the sensor is not working, obtaining the first brake clamping force through a motor model, obtaining the second brake clamping force through a brake friction plate model, and obtaining the final brake clamping force through a fuzzy logic weight algorithm; determining whether the wheel has a risk of being locked; if not, calculating the current ground longitudinal force of the wheel according to a wheel dynamics model; if yes, triggering a longitudinal force locking logic, and obtaining the current locking ground longitudinal force as the current ground longitudinal force of the wheel; combining the vertical force to calculate the current utilization adhesion coefficient of each wheel; and judging the road surface type where the vehicle is located based on the utilization adhesion coefficient of each wheel and by using a fuzzy rule. The application solves the problem of low recognition precision.

Disclosed herein are an electromechanical brake system and a control method thereof. In accordance with one aspect of the present disclosure, there is provided an electromechanical brake system including electromechanical brakes respectively provided on four wheels of a vehicle, a sensor part that outputs a signal which corresponds to or is capable of estimating whether each of the electromechanical brakes is normal and a driver demand braking torque generated based on the speed and lateral acceleration of the vehicle and a brake pedal operation of a driver, and a controller that estimates a demand braking torque based on the signal received from the sensor part and determines whether the electromechanical brakes are normal, wherein the controller performs a braking control as much as the demand braking torque based on the determination that the electromechanical brakes are normal, and performs a braking control by distributing, within a range of the demand braking torque, braking torques based on the lateral acceleration of the vehicle to the respective other electromechanical brakes except the electromechanical brake determined to malfunction based on the determination that there is a malfunction of any one among the electromechanical brakes.