59results about "Failsafe aspects" patented technology

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.

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.

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.

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 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).

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.

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 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.

Disclosed herein is a system including a primary brake control unit (204a), a secondary brake control unit (204b), a first remote data power concentrator configured to receive a first command from the primary brake control unit (204a) and a second command from the secondary brake control unit (204b), and an electric brake actuator configured to receive the first command or the second command from the first remote data power concentrator in response to a first signal.

The invention discloses a redundant power supply system (rPMS) for an electromechanical brake system of a vehicle, comprising at least two brake circuits (1) and (2), each comprising at least two energy storage modules (10, 15) connected in series so that the two modules can collectively power wheel end brake actuators (17, 18).

The present invention relates to a control device (10) for a motorized brake pressure build-up device (12) of a vehicle's braking system and a method for operating a motorized brake pressure build-up device (12) of a vehicle's braking system by actuating a motor (12a) of the motorized brake pressure build-up device (12) taking into account at least one defined control variable, wherein the at least one control variable is defined at least in a first actuating mode taking into account at least one target value with respect to a pressure increase to be effected in at least one partial volume of the braking system and with additional consideration of at least one actual value measured by means of at least one sensor of the motorized brake pressure build-up device (12) and / or the braking system with respect to an actual pressure present in at least one partial volume.and wherein, taking into account at least one actual operating parameter with respect to a current operation of the motorized brake pressure building device (12), the system switches at least sometimes from the first control mode to a second control mode, and the at least one control parameter in the second control mode is determined taking into account the at least one target parameter and disregarding the at least one actual parameter.

The embodiment of the invention provides a hydraulic braking system leakage detection method and device, relates to the technical field of vehicle braking, and is suitable for an electronic stability control system. The electronic stability control system collects real-time operation data of the electromagnetic valve and real-time operation data of the motor pump; brake fluid consumption is obtained, wherein the brake fluid consumption is the real-time brake fluid amount in a hydraulic pipeline of the hydraulic brake system; the real-time operation data of the electric cylinder and the consumption amount of the brake fluid are compared with a preset detection condition, a detection result is obtained, the preset detection condition is used for representing the amount of the brake fluid in the hydraulic pipeline when the electric cylinder operates under the normal operation condition of the hydraulic brake system, and the detection result is used for representing whether leakage occurs or not. According to the method, the complexity and the manufacturing cost of the hydraulic brake system can be reduced, the occupied space of the system can be reduced, brake fluid leakage detection can be conducted in real time, the brake safety function coverage rate is increased, the brake performance is improved, and safety is guaranteed.

The embodiment of the application relates to the technical field of multi-wheel brake control, in particular to a multi-wheel brake system based on brake capacity and a brake fault comprehensive treatment method, the system comprises an instruction control system and a drive control system, the drive control system comprises N brake channels, each brake channel comprises a hydraulic system, a cut-off valve, two servo valves, two brake wheels and two pressure sensors; the hydraulic system is connected with the cut-off valve, the cut-off valve is connected with the two servo valves, the two servo valves are connected with the two brake wheels, and the two brake wheels are provided with the pressure sensors; the hydraulic system is used for providing a hydraulic oil source; the cut-off valve is used for controlling the opening and closing of the hydraulic oil source; the servo valve is used for adjusting the flow of the hydraulic oil source; the brake wheel is used for executing a brake operation; and the pressure sensor is used for detecting brake pressure and transmitting the brake pressure to the instruction control system. Therefore, brake capacity is compared according to the comprehensive fault result, the margin with high brake capacity is preferentially used, and the safety of the system is improved.

A brake control unit is provided comprising a primary control branch, a backup control branch, and mode control utilities, wherein the mode control utilities are configured to select in accordance with integrity diagnostic indications an operational mode of the brake control unit from a plurality of potential operational modes comprising at least a normal operational mode and a degraded operational mode, wherein respectively the primary control branch and the backup control branch are configured to generate a brake motor drive signal with their respective inverter being controlled by their respective control module in response to an external brake control signal, wherein the primary control module is configured to provide the integrity diagnostic indications in that it includes at least a first and a second mutually cooperating primary control component that are configured to diagnose each other's integrity status, and in that it is further configured to diagnose an integrity status of the backup control branch by verifying a response signal of the backup control branch in response to a test signal.

The electronic circuit (22) includes an electronic control unit (16), a safety control device (24), and an electronic lock unit (26) having a delay unit (27) and a memory unit (28). The electronic control unit is configured to control the actuator using a normal actuation control signal (32). The safety control device generates a trigger signal (40) for the electronic lock unit. The delay unit receives the normal actuation control signal and transmits it to the memory unit with a time delay. The memory unit receives the trigger signal and stores the normal actuation control signal transmitted from the delay unit immediately upon receiving the trigger signal. The electronic lock unit controls the actuator based on the normal actuation control signal stored as an output signal from the memory unit immediately upon receiving the trigger signal and storing the normal actuation control signal transmitted with the time delay.

A vehicle (1) on which an autonomous driving system (3) is mountable, the vehicle comprising: a vehicle platform (5) configured to control the vehicle (1) in accordance with an instruction from the autonomous driving system (3); and a vehicle control interface (4) configured to serve as an interface between the autonomous driving system (3) and the vehicle platform (5), wherein the vehicle platform (5) is configured to output, to the autonomous driving system (3) through the vehicle control interface (4), a brake pedal position signal that provides an amount of depression of a brake pedal (50) detected by a sensor which is configured to detect a position of the brake pedal (50), and to output, to the autonomous driving system (3) through the vehicle control interface (4), a brake pedal intervention signal which provides a value generated from the brake pedal position signal that may indicate a value outside a range of the amount of depression.

A pneumatic brake system for a towing and towed vehicle includes means for supplying a supply pressure and means for supplying a control pressure to the towed vehicle. An electrical connection is provided between respective ECUs on the towing and towed vehicles which are able to exchange information and determine whether the brake system in both towed and towing vehicle is compatible with an electronic brake signal and whether the brake system is compatible with secondary supply pressure being applied via a control pressure line. If both conditions are fulfilled, the brake system actuates a switching device or devices on the towing and towed vehicles to direct air from the means for supplying a control pressure to a second pneumatic supply circuit in the towed vehicle.

The present invention relates to a control device (10) for a motorised brake pressure build-up device (12) of a brake system of a vehicle and to a method for operating a motorised brake pressure build-up device (12) of a brake system of a vehicle by actuating a motor (12a) of the motorised brake pressure build-up device (12) taking into account at least one defined actuation variable, wherein at least in a first actuation mode, the at least one actuation variable is defined taking into account at least one target variable with respect to a pressure increase to be effected in at least one partial volume of the brake system and additionally taking into account at least one actual variable, measured by means of at least one sensor of the motorised brake pressure build-up device (12) and / or of the brake system, with respect to an actual pressure present in at least the one partial volume, and wherein, taking into account at least one actual operating variable with respect to a current operation of the motorised brake pressure build-up device (12), there is a switch, at least sometimes, from the first actuation mode to a second actuation mode, and the at least one actuation variable is defined in the second actuation mode taking into account the at least one target variable and not taking into account the at least one actual variable.

A brake system may include at least two wheel brake cylinder of separate wheel circuits, at least one pressure supply to provide pressure in the wheel brake cylinders, at least one reservoir, at least one electronic control and regulating unit, and switching valves arranged to connect and disconnect respective hydraulic lines connected to the respective wheel brake cylinders to / from at least one main hydraulic line coupled to the pressure supply(s). Leakage diagnostics of the individual wheel circuits and / or other components of the brake system may be carried out. The switching valves may include an electromagnetic drive and a force-adding device for operation of the valves.

This application provides a vehicle parking method, apparatus, device, and storage medium. The method includes: receiving a user's parking request; issuing a first control command to a first controller to control a first caliper to clamp, and issuing a second control command to a second controller to control a second caliper to clamp; acquiring the actual states of the first and second calipers; if either the first or second caliper is in a released state, detecting the actual parking slope of the vehicle; comparing the parking force of the first caliper and the parking force of the second caliper with the parking force required for the actual parking slope of the vehicle; if the parking force of the first caliper is less than the parking force required for the actual parking slope of the vehicle, or if the parking force of the second caliper is less than the parking force required for the actual parking slope of the vehicle, outputting a safety warning message to the user. Applying this invention can improve parking safety.

The present application discloses a locomotive brake control system and a control method, wherein the locomotive brake control system comprises a brake cylinder control system, a brake cylinder equalizing pipe control system and a changeover cock; when the changeover cock is in the cut-in position, if the locomotive brake control system is powered off or fails or is in a dead mode, the brake cylinder equalizing pipe control system outputs the brake cylinder equalizing pipe pressure according to the mechanical distribution valve pressure, and the brake cylinder control system outputs the brake cylinder pressure according to the mechanical distribution valve pressure and the brake cylinder equalizing pipe pressure; when the changeover cock is in a cut-off position, if the locomotive brake control system is powered off or fails, the brake cylinder control system outputs the brake cylinder pressure according to the mechanical distribution valve pressure and the brake cylinder equalizing pipe pressure from the lead unit.

The application discloses a vehicle air pressure brake monitoring system, a monitoring method and a vehicle, and relates to the technical field of vehicle monitoring systems.

The present disclosure relates to an electronic control device comprising a housing, a first controller and a second controller located in the housing and controlling a motor, a first internal transceiver and a second internal transceiver provided in the first controller, a third internal transceiver and a fourth internal transceiver provided in the second controller, a first connector extending through one side of the housing, attached to the housing and connected to the second internal transceiver, a second connector extending through the other side of the housing, attached to the housing and connected to the fourth internal transceiver, a first internal communication network communicatively connecting the first internal transceiver and the third internal transceiver in the housing, and a second internal communication network.This includes connecting the first and second connectors on the outside of the housing to provide communication links to the second and fourth internal transceivers and a braking device, including the same. The communication procedure and network between the controllers are redundant to maintain vehicle safety.

A 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 redundant power supply system (rPMS) for an electro-mechanical brake system for a vehicle is disclosed comprising at least two brake circuits (1) and (2) wherein each brake circuit comprises at least two energy storage device modules (10, 15) connected in series in a configuration, so that the two modules together can supply electric power to wheelend brake actuators (17, 18).