2523results about "Brake safety systems" patented technology

The invention relates to a brake system including at least one brake with an electric brake actuator, at least one electronic control unit for controlling the at least one electric brake, and two different power supply units connected to the at least one electronic control unit and configured for supplying energy to the at least one electric brake actuator. The at least one electronic control unit comprises a first brake actuation system for activating the electric brake actuator and a redundant brake actuation system for activating the electric brake actuator in case of a failure of the first brake actuation system. The invention also relates to a method for using the brake system.

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.

The invention provides an EMB sensorless clamping force estimation method based on multi-signal fusion and displacement compensation, and belongs to the technical field of vehicle braking, and the method comprises the steps: carrying out the modeling of an EMB system mechanical model; on the basis of the EMB system mechanical model established in the step S110, executing clamping force estimation; on the basis of the EMB system mechanical model established in the step S110, current-position information fusion is adopted to execute contact point detection; on the basis of the contact point detection result in the step S130, performing contact point detection position error compensation; on the basis of S140 position error compensation, a return stroke backlash compensation mechanism is introduced, the mechanical transmission gap error is further corrected, and the clamping force estimation precision is improved; and executing clamping force control scheme design based on the results of the steps. According to the method, a good clamping force estimation effect can be achieved, the system reliability is remarkably improved while the cost is reduced, and the method has good engineering application value.

The invention provides a new energy vehicle fault diagnosis and prediction method based on deep learning, and the method comprises the steps: collecting the brake intensity sudden change data in the operation of a new energy vehicle in real time, and determining the trend and amplitude range of the current brake intensity change according to the brake demand signals under various working conditions in combination with the historical fault mode record analysis, thereby achieving the fault diagnosis and prediction of the new energy vehicle. Obtaining a preliminary braking demand characteristic value; according to the braking demand characteristic value, calling a pre-established deep learning prediction model, analyzing the relevance between a historical fault mode and current braking strength sudden change data, calculating the probability distribution of feedback energy anomaly detection, and determining the potential fault risk level of the new energy vehicle; and for the potential fault risk level, acquiring real-time data of surface temperature scanning of the brake disc, identifying a thermal load area, analyzing temperature distribution uniformity, judging whether a key area exceeds a preset threshold value or not, and obtaining a thermal load state evaluation result.

The application discloses an intelligent electric chassis configuration and a fault-tolerant control method of the intelligent electric chassis, and relates to the technical field of electric chassis. The chassis configuration comprises a front axle centralized motor drive assembly, a rear axle distributed motor drive assembly, a front axle electronic hydraulic brake system, a rear axle electronic mechanical brake system and a chassis domain controller. The front axle centralized motor drive assembly comprises a centralized drive motor, a front wheel speed reducer and a drive half shaft which are sequentially connected. The rear axle distributed motor drive assembly comprises a left rear wheel end drive motor and a left rear wheel speed reducer which are sequentially connected, and a right rear wheel end drive motor and a right rear wheel speed reducer which are sequentially connected. The front axle electronic hydraulic brake system comprises a first main brake unit and a redundant brake unit. The rear axle electronic mechanical brake system comprises a second main brake unit. The chassis domain controller is used for controlling the centralized drive motor, the left and right rear wheel end drive motors, the first main brake unit, the redundant brake unit, the second main brake unit, a front axle steer-by-wire system, an intelligent suspension system and an intelligent tire. The application can improve the chassis safety and fault-tolerant capability to support high-level automatic driving functions.

The invention provides an emergency braking control method, which is realized by using an emergency braking loop structure, and the emergency braking loop structure comprises a control loop connected with an occupied end and an action loop for connecting emergency braking electromagnetic valves of vehicles in parallel; a positive electrode power supply and a negative electrode power supply are provided for the control loop through the occupied end, and the control loop enables the two ends of an emergency braking loop relay to be powered on by connecting monitoring conditions and train lines in series; the action loop is used for connecting the emergency braking electromagnetic valves of all the vehicles in parallel, and when the relay of the emergency braking loop loses power, the normally open contact is disconnected, the emergency braking electromagnetic valves of all the vehicles lose power, and emergency braking is generated; according to the method, the problems and defects of an emergency braking loop of an existing motor train unit project can be solved, a specific monitoring function is executed through the emergency braking loop independent of a train control system, and the emergency braking loop adopts a control mode of a hardware relay control circuit, so that safe stopping of a motor train under the fault condition is guaranteed.

The invention discloses a brake pedal verification method, device and equipment based on a two-way pedal and a storage medium, relates to the technical field of vehicle brake control, and discloses the brake pedal verification method based on the two-way pedal. Comprising the steps that a brake lamp switch signal, an allowable deviation threshold value and a first sensor signal and a second sensor signal of a two-way pedal position sensor are obtained; performing processing according to the first sensor signal and the second sensor signal to obtain a target deviation value, and performing consistency analysis according to the target deviation value and the allowable deviation threshold to obtain a consistency analysis result; performing fault tracing on the consistency analysis result according to the brake lamp switch signal to obtain a fault positioning result; and fault isolation is carried out based on the fault positioning result, so that brake pedal verification based on the two-way pedal is completed. The technical effect of guaranteeing the signal reliability of the two-way pedal position sensor and the function continuity of the braking system is achieved.

The invention discloses a high-temperature protection control method of a vehicle braking system and a vehicle, belongs to the technical field of vehicle control, and aims to solve the problems that an existing vehicle braking system lacks high-temperature trend prediction capacity and a dynamic braking force adjusting mechanism, heat accumulation is prone to occurring under the high-load working condition, braking performance declines, and the service life is poor. And therefore, the technical problem of insufficient braking stability and safety is solved. The method comprises the following steps: constructing a generative diffusion model; constructing a temperature control trend prediction model; training the temperature control trend prediction model through the high-temperature time sequence and the braking heat data sample set; constructing a multi-target reinforcement learning strategy model; performing multi-model fusion processing on the generative diffusion model, the temperature control trend prediction model and the multi-target reinforcement learning strategy model to obtain a high-temperature protection control system; and inputting the real-time braking heat data of the target vehicle into a high-temperature protection control system to obtain a corresponding control action vector so as to carry out high-temperature protection control on a vehicle braking system.

The invention relates to the technical field of electric vehicle braking, and discloses an intelligent electro-hydraulic composite braking system of an electric vehicle and a control method of the intelligent electro-hydraulic composite braking system. The system comprises a braking state sensing module, a risk assessment module, a strategy collaborative generation module and a control updating module. The braking state sensing module collects vehicle running state data and road surface environment information in real time through a multi-source sensor, and a braking working condition feature set and environment feature information are constructed. The braking risk assessment module obtains a comprehensive braking risk value in combination with the environment characteristic information, the initial braking parameters of the vehicle, the current braking request and the state information of the electro-hydraulic actuator; when the risk value is abnormal, a braking strategy collaborative generation module generates a plurality of electro-hydraulic composite braking distribution schemes, calculates a collaborative execution interference degree and an intervention evaluation value, screens an optimal scheme and generates an optimized braking control strategy; and the brake control updating module updates brake control parameters in real time according to an optimization strategy, generates brake operation log information and adapts to complex working conditions.

The invention relates to the technical field of vehicle braking, and discloses a drive-by-wire hybrid braking method and device, equipment and a medium. A braking instruction of a target vehicle is obtained, braking demand analysis is conducted according to the braking instruction, and braking demand torque is obtained; the target vehicle is at least provided with an energy recovery system, a front wheel hydraulic braking system and a rear wheel running and parking integrated system; when the target vehicle is in other working conditions, the braking demand torque is distributed to the energy recovery system or the energy recovery system and the front wheel hydraulic braking system; and when the target vehicle is in the preset braking working condition, the braking demand torque is distributed to the energy recovery system, the front wheel hydraulic braking system and the rear wheel running and parking integrated system according to the braking distribution proportion. The rear wheel running and parking integrated system has the beneficial effects that the rear wheel running and parking integrated system is used for replacing a hydraulic braking system, braking is carried out through cooperative work between the braking systems, the complexity of the braking systems is optimized on the basis of ensuring the braking safety of the vehicle, and the fault probability of the braking systems is reduced.

The invention relates to a shared bicycle brake pad abrasion monitoring system and a monitoring method thereof, and aims to solve the problems that in the prior art, shared bicycle brake pad abrasion monitoring is high in cost and low in precision, and abnormal abrasion cannot be detected, and accurate monitoring is achieved through a multi-parameter correction model of brake frequency statistics and pressure distribution perception. A microswitch is arranged on a brake pedal, three film pressure sensors are arranged on a brake pad steel backing, a brake pressure value, an average effective pressure Pavg and a pressure distribution difference delta P are synchronously collected, a wear estimation model is built by combining working condition data such as temperature and vehicle speed, and a material coefficient k, a vehicle speed correction coefficient f (v) and a temperature correction coefficient g (T) are adopted for multi-dimensional correction, so that the wear estimation precision is improved. And calculating the accumulated abrasion loss and predicting the residual thickness. Accurate recognition of abnormal wear such as eccentric wear and block falling is achieved by analyzing a delta P threshold value and Pavg mutation characteristics, parameter customization of brake pads made of different materials is supported, and a graded early warning function is achieved.

The invention relates to the field of brake early warning, in particular to a brake early warning method, device and equipment and a medium. According to the brake disc temperature, the brake disc thickness and the set temperature, the first residual heat capacity is determined, and the set temperature is the temperature for guaranteeing the braking efficiency; acquiring data corresponding to the unmanned aerial vehicle task, and calculating braking energy according to the data corresponding to the unmanned aerial vehicle task; brake early warning information is determined according to the first residual heat capacity and the brake energy, and the brake early warning information is used for conducting brake warning. The first residual heat capacity is determined according to the brake disc temperature, the brake disc thickness and the set temperature; according to the data corresponding to the unmanned aerial vehicle task, brake energy is calculated; brake early warning information is determined according to the first residual heat capacity and the brake energy; the multi-dimensional real-time evaluation of the brake disc state, the task parameters and the brake efficiency is integrated; the thermal risk is pre-judged through the task parameters, and accurate brake early warning information is determined.

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.

Aspects of the present invention relate to a wet disc brake for an off-highway vehicle comprising: a brake caliper a disc pack located within the brake caliper and arranged to locate on a vehicle shaft having a longitudinal axis extending in an inboard-outboard direction, the disc pack comprising: a plurality of counter discs arranged in series on the axis; and a plurality of friction discs arranged in series on the axis in an alternating arrangement with the counter discs, each friction disc comprising friction material and being configured to be rotatably fixed to the vehicle shaft; and a piston actuatable within the brake caliper during a brake operation to urge the friction material of the friction discs to engage the counter discs to slow the vehicle; and a contactless wear sensor assembly configured to measure the axial length of the disc pack.

The application discloses a brake fluid filling and exhaust device and a control method and system thereof. The device comprises a liquid supplement tank, a liquid supplement pipeline, a liquid return pipeline, a first valve and a second valve. The liquid supplement tank is internally provided with a filter, the top of the tank body is provided with an exhaust port, one side of the tank body is connected with the liquid supplement pipeline, the liquid supplement pipeline is provided with the first valve, the other side of the tank body is connected with the liquid return pipeline, and the liquid return pipeline is provided with the second valve. When brake fluid is filled, the liquid supplement tank, the liquid supplement pipeline, a liquid storage pot, brake calipers and the liquid return pipeline are communicated to form a circulating passage of brake fluid, and when a stop-filling condition is met, the liquid storage pot stops filling brake fluid to the brake calipers, and the stop-filling condition at least comprises that gas in the brake system is exhausted. Through the technical scheme provided by the application, gas in brake fluid can be filtered, separated and exhausted from the exhaust port in the brake fluid circulation process, automatic filling and exhaust of brake fluid are realized, and the filling and exhaust efficiency of brake fluid is improved.

The invention relates to the technical field of automobile safety control, and discloses a brake detection method and system, a vehicle and a computer readable storage medium. The brake detection method comprises the steps that a brake switch signal and an air pressure switch signal are obtained; based on the brake switch signal and the air pressure switch signal, whether a brake request exists or not is judged; wherein if any one of the following conditions is met, it is judged that the brake request exists: the brake switch signal is in an effective state and a brake switch normally-closed fault is not triggered; the air pressure switch signal is in an effective state and does not trigger an air pressure switch normally-closed fault; the brake switch signal and the air pressure switch signal are both in an effective state. The brake intention recognition accuracy and the system reliability are effectively improved by obtaining the brake switch signal and the air pressure switch signal and judging whether the brake request exists or not based on the double-switch redundancy logic.

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.

The invention provides a single electric brake booster module with redundant electronics. A vehicle control system of a vehicle may include an electronic brake booster module for adjusting a front brake of a brake system of the vehicle; a pedal travel sensor and a pedal angle sensor operably coupled to a brake pedal of the vehicle; a vehicle control module that may be configured to monitor a vehicle control system; and a first power supply and a second power supply operably coupled to the electronic brake booster module. The electronic brake booster module may also include a first circuit board for controlling brake actuation and a second circuit board for controlling brake modulation, and the vehicle control module or the electronic brake booster module may determine a fallback condition based on the fault condition, the fault state is determined based on pedal actuation, pedal angle, and an operating state of one or more of the first and second power supplies.

The present disclosure relates to a brake system and a method of controlling the same, the brake system including first and second wheel speed sensors respectively installed in wheels of a vehicle, electrohydraulic brakes respectively installed in front wheels of the vehicle, electromechanical brakes (EMBs) respectively installed in rear wheels of the vehicle, and a first controller configured to perform braking control on the electrohydraulic brakes and the electromechanical brakes based on a first front wheel speed signals outputted from the first wheel speed sensors installed in the front wheels, in which when a failure of the first wheel speed sensors installed in the front wheels are identified, the first controller performs the braking control on the electrohydraulic brakes and the electromechanical brakes based on the first rear wheel speed signals outputted from the first wheel speed sensors installed in the rear wheels.

A brake control apparatus is provided for a vehicle train having a tractor and one or more towed vehicles coupled to the tractor. The brake control apparatus comprises a tractor controller arranged to detect a pressure change in at least one brake line of the vehicle train in response to a brake trigger signal. The tractor controller is also arranged to process the detected pressure change to estimate a combination of the number of the towed vehicles and a total length of the number of towed vehicles coupled to the tractor.

A fail-safe control method of an electromechanical brake apparatus comprising a plurality of wheel controllers, a main controller, and an auxiliary controller that control electromechanical brakes disposed on each wheel of a vehicle, the method comprising: deciding a self-status of each of the plurality of wheel controllers, the main controller, and the auxiliary controller based on pre-classified status information; sharing self-status decided by each of the plurality of wheel controllers, the main controller, and the auxiliary controller; determining a status of one another based on the shared self-status among the plurality of wheel controllers, the main controller, and the auxiliary controller; activating a pre-designated fail-safe mode based on status information of each of the plurality of wheel controllers, the main controller, and the auxiliary controller; and performing emergency braking of the vehicle based on the pre-designated fail-safe mode or maintaining the vehicle in a drivable status.

A brake actuator is disclosed for an electromechanical vehicle brake, comprising an electric motor for actuating the vehicle brake, a blocking assembly for selectively rotationally blocking an output shaft of the electric motor for the purposes of implementing a parking brake function. The blocking assembly comprises a blocking module, which is mounted so as to be movable linearly between an arresting position and a release position, and a drive for moving the blocking module. The brake actuator further includes an electronic detection device for detecting the arresting position and / or the release position of the blocking module. Also specified is a method for operating a brake actuator.

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.

An electropneumatic ABS brake system is for a utility vehicle. The brake system has: a foot brake valve operable via a brake pedal and including pneumatic output channels, axle service brake circuits connected to the output channels and each having an axle valve unit and ABS valves for actuating wheel service brakes, a control unit for actuating the ABS valves and the axle valve units, and a first pressure sensor connected to one of the two pneumatic output channels and configured to measure the pneumatic control pressure output by the foot brake valve and to output a first pressure signal to the control unit. A second pressure sensor is provided separately from the first sensor and is configured to output a second pressure signal to the control unit, which receives the two pressure signals and actuates the ABS valves and / or the axle valve units as a function of the signals.

A brake system and method of control. A brake pad assembly is actuatable from a retracted position to an extended position with a fluid. The method includes determining whether a running clearance is acceptable based on a first fluid supply pressure associated with the brake pad assembly being in a retracted position and a second fluid supply pressure associated with the brake pad assembly being in an extended position.

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.

A trailer control box may receive a wireless message from a controller of the tractor. The trailer control box may validate and authenticating the message. The trailer control box may control an emergency-brake valve based on the message when the message is an emergency-brake command. The trailer control box may control a service-brake valve based on the message when the message is a service-brake command. The trailer control box may control at least one switch to operate trailer lights based on the message when the message is a light command. In certain embodiments, autonomous-capable socket is mounted to a trailer and includes: a chamfered outer casing, a plurality of electrical connectors, a service-brake air aperture, and an emergency-brake air aperture. The autonomous-capable socket required a single autonomous connection by an autonomous tractor.

An electronic park brake system includes a first electronic control unit configured to receive and compare at least first and second speed inputs and provide a quality indicator signal indicating a quality of a vehicle speed signal being delivered to an electronic brake control unit. The electronic park brake control unit is configured to receive the quality indicator signal and the vehicle speed signal, determine a motion state of the vehicle and maintain a full operational state of an electronic park brake if the quality indicator signal is a high quality signal, and limit the operational state of the electronic park brake if the quality indicator signal is a medium quality signal or a low quality signal.Methods of using the system are also provided.

A towed vehicle controller combines a trailer brake controller and lighting driver. The towed vehicle controller can include a trailer battery charging circuit. The towed vehicle controller operates towed vehicle braking, towed vehicle lighting and towed vehicle battery charge functions.

The invention discloses a satellite positioning braking performance detector, belongs to the field of vehicle detection, and aims to realize accurate and dynamic evaluation of vehicle braking performance through real-time interaction of a high-precision satellite positioning technology and a braking signal. The system comprises a starting device, a positioning device and a positioning base station, the starting device comprises a box body and a stroke sensor arranged in the box body, and the stroke sensor can send a first pulse signal after being excited; the positioning device is electrically connected with the starting device and can receive the first pulse signal, the positioning device can also send out a second pulse signal, and the positioning device is configured to be arranged outside the measured vehicle. And the positioning base station is in wireless communication connection with the positioning device and is configured to receive the second pulse signal and perform differential positioning calculation according to the second pulse signal. According to the invention, the real-time association of the brake signal and the high-precision positioning information is realized, the sensitivity of brake triggering is ensured, and the precision of the whole detection is improved through differential positioning calculation.