102 results about "Anti-lock braking system" patented technology

Disclosed in the present application is a wheel anti-lock braking system applicable to hill braking. In the wheel anti-lock braking system, a wheel speed identification module is used for identifying a vehicle wheel speed signal and a wheel acceleration signal; a vehicle speed acquisition module is used for calculating a vehicle body speed signal; a driving intention identification module is used for obtaining a front and a rear axle enable flag bit; a state machine module is used for determining whether the working state of a low-speed hill anti-lock braking system is a standby state or a shutdown state, and starting a conventional anti-lock braking system when the working state of the low-speed hill anti-lock braking system is a shutdown state; the state machine module receives the front and rear axle enable flag bits, and transmits the front and rear axle enable flag bits to a control logic module when the working state of the low-speed hill anti-lock braking system is a standby state; and the control logic module is used for sending a low-speed hill anti-lock braking system control command when wheels show a tendency to lock up. The present application realizes anti-lock braking control over wheels at low speeds, especially during hill braking, which cannot be achieved by conventional wheel anti-lock braking systems.

The invention relates to the technical field of braking systems, and discloses a vehicle braking force determining method and device, a vehicle and a medium. Determining a target pedal travel based on the pedal travel signal; the temperatures of all brake discs, the depths of brake pedals, the activation states of the anti-lock braking system and the current braking force fed back by the braking executing mechanism in real time are obtained, and heat fading analysis is conducted on the braking executing mechanism based on the temperatures of all the brake discs, the depths of the brake pedals, the activation states of the anti-lock braking system and the current braking force; obtaining a heat fading analysis result; and in response to a current brake pedal feeling determined by the driver, determining a target braking force corresponding to the target pedal travel based on the current brake pedal feeling and the heat fading analysis result. The multi-dimensional parameters are adopted for heat fading analysis, different driver operation habits are adapted, accurate recognition of the braking force is facilitated, and the user experience is greatly improved.

A method and system for providing maximum trailer braking during a high pressure demand, such as during autonomous emergency braking (AEB), for tractor-trailers is provided. The system can include a brake controller of the trailer that uses only tractor anti-lock brake system (ABS) data from the tractor wheels, without using any trailer ABS information, to estimate the surface friction and generate a high or low pressure command to be sent to the trailer based on only the tractor ABS data. The estimation of surface friction may be accomplished using the ABS information from the tractor and the pressure being demanded to determine a percent reduction of pressure requested by the tractor that may be compared to a threshold percentage to differentiate between high and low mu surfaces in real time.

The invention relates to the technical field of vehicle control, and discloses a vehicle control method, a readable medium, electronic equipment and a program product. The vehicle control method comprises the steps that under the condition that an anti-lock braking system of a vehicle is in a working state, an electronic control unit of the vehicle can obtain the acceleration of wheels of the vehicle at the current moment, the acceleration and preset parameters are superposed, and the steady-state value variable quantity of the vehicle is obtained. Wherein the preset parameter is associated with the vehicle speed. Furthermore, the electronic control unit of the vehicle can superpose the steady-state value variable quantity and the steady-state value at the previous moment to obtain the steady-state value of the vehicle at the current moment, and the steady-state value is used for indicating the driving stability of the vehicle. And under the condition that the steady state value at the current moment is smaller than a set threshold value, an anti-lock braking system of the vehicle is triggered to release pressure. By means of the vehicle control method, delayed triggering caused by the fact that the anti-lock braking system is triggered to release pressure according to the slip rate can be avoided, and the stability of the vehicle is improved.

The invention relates to the technical field of vehicle active safety, and discloses an anti-lock braking system and control method based on wheel speed prediction.The control method comprises the following steps that acoustic and vibration signals reflecting tire-road surface interaction are collected in real time through a predictive sensor set, and a conventional wheel speed signal is combined; and extracting a predictive feature vector and a conventional dynamic feature vector. The core of the method is that a time sequence prediction neural network is utilized to process fused time sequence features, and an optimal slip rate target and an optimal control strategy identifier are generated at the same time in a prospective manner. And the system dynamically selects and switches an optimal control algorithm from a preset control strategy library according to the optimal control algorithm, and carries out closed-loop brake pressure regulation by taking the predictive target as a guide. According to the method, traditional reaction type control is converted into predictive control, response lag of a braking system during sudden change of the road surface is fundamentally overcome, and the stability, efficiency and safety of the braking process are remarkably improved.

The invention relates to a method for determining the tire pressure (104) of at least one vehicle tire (8) of a vehicle (1), wherein the vehicle (1) has a tire pressure monitoring system (2) for detecting the tire pressure (104) and / or a pressure gradient (106) of the at least one vehicle tire (8), an electronic stability program (4) and an anti-lock braking system (6), wherein an active intervention of the electronic stability program (4) and / or the anti-lock braking system (6) is detected and, in the event of a detected active intervention, a sampling rate (102) for detecting the tire pressure (104) and / or the pressure gradient (106) is temporarily increased.

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

The present invention relates to an anti-lock braking system (ABS) module (200) for a vehicle having an integrated DC-DC converter (114). The ABS module (200) comprises at least one pump (102) connectable to a brake master cylinder (104), at least one electric motor (106) for operating the at least one pump (102), at least one valve (108) in fluid communication with the at least one pump (102), and a control unit (110) powered by a main power supply (112) through the DC-DC converter (114) to operatively control the at least one electric motor (106) and the at least one valve (108), characterized in that the DC-DC converter (114) is integrated within the control unit (110). In an embodiment of the invention, the electric power supplied to the at least one electric motor (106) and the at least one valve (108) is through the DC-DC converter (114).

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

The invention provides an unmanned special vehicle anti-lock braking system, which comprises a brake caliper, a brake disc, a wheel speed sensor, a pressure regulator, an energy accumulator, an oil storage tank, a hydraulic pump, a logic controller and a brake pipeline, and has the main function of forcibly decelerating and even stopping a running vehicle according to the requirements of a driver. And the vehicle can be stably parked on a flat road and a ramp, or the speed of the vehicle running downhill is kept stable. Brake calipers on the two sides of the brake system are independently connected with a pressure regulator and can independently control the brake pressure on one side, and when a logic controller receives a brake instruction of a whole vehicle controller, the brake instruction is one hundred percent of brake or emergency brake, the system judges that the vehicle needs emergency stop, an anti-lock braking system is started immediately, and the brake pressure on one side is controlled. The driving wheels on the two sides are intermittently braked at high frequency through the pressure regulator, so that sideslip and deviation of a vehicle track relative to the ground are reduced, the braking performance of the unmanned special vehicle is improved, the braking distance is shortened, and the device has the advantages of being high in integration degree and rapid in response.

The invention relates to a fixed-time sliding mode anti-lock braking control method and system based on fuzzy logic and a neural network. The method comprises the steps that a dynamic model of a vehicle anti-lock braking system is established; designing a fixed time sliding mode controller, and constructing a sliding mode surface containing a terminal attractor and an approaching law; a T-S fuzzy logic system is adopted to approach a non-linear tire-road surface friction function in an ABS system on line; an approaching law of the sliding mode controller is approached online by adopting an artificial neural network; carrying out online optimization on additional control item gains introduced by neural network approximation by adopting a particle swarm optimization algorithm; and the fixed time stability of the whole closed-loop system is monitored based on the Lyapunov stability theory. According to the invention, the braking efficiency, the stability and the robustness of the ABS system are effectively improved, and the braking distance and the braking time are reduced.

The invention provides a collision analysis method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a request deceleration of an automatic emergency braking function of a test vehicle, and first deceleration data and second deceleration data in the triggering process of the automatic emergency braking function of the test vehicle, the test vehicle intrudes a target distance of the target vehicle colliding with the test vehicle; the first deceleration data is the deceleration in the process that the anti-lock braking system function of the test vehicle is not triggered; the second deceleration data is the deceleration in the function triggering process of the anti-lock braking system of the test vehicle; according to the requested deceleration, the first deceleration data and the second deceleration data, the braking distance of the tested vehicle prolonged due to the function of the anti-lock braking system is calculated; and performing numerical comparison on the braking distance and the target distance to obtain a collision analysis result. According to the invention, vehicle collision can be accurately analyzed, and reliable data support is provided for optimization of a subsequent safety system.

A control method for regenerative braking of a road vehicle comprising the steps, for each driving wheel (4, 5), of: estimating a grip factor (G); defining or collecting a vertical load (Fz); computing a value of a maximum braking capacity (MRT) depending on the grip factor (G) and the vertical load (Fz); controlling a braking system (13), following a request for braking, so as to actuate a hydraulic unit (18) to exert a first braking torque (mBT) and so as to actuate in regenerative electric braking each wheel at least according to the respective maximum braking capacity (MRT) value and in particular the first braking torque (mBT); and modulating the first braking torque (mBT) and / or the second braking torque (eBT) so that their sum is equal to or less than the respective maximum braking capacity (MRT) value.

The embodiment of the utility model discloses a quick-release connector and a bicycle, the quick-release connector is used for connecting an oil inlet end of an anti-lock braking system of the bicycle with an oil pipe, and the quick-release connector comprises a female head, a male head and a connecting bayonet lock. The female head is connected to the oil inlet end, and two first clamping grooves which are oppositely arranged are formed in the female head; the male head is connected to the oil pipe, the end, away from the oil pipe, of the male head is detachably inserted into the end, away from the oil inlet end, of the female head, two oppositely-arranged second clamping grooves are formed in the male head, and the first clamping grooves communicate with the second clamping grooves in an aligned mode so that the first clamping grooves can be exposed out of the second clamping grooves; the connecting clamping pin is inserted into the second clamping groove and forms extrusion force on the male head in the radial direction, and the connecting clamping pin abuts against the inner wall, in the axial direction, of the first clamping groove and the inner wall, in the axial direction, of the second clamping groove so as to limit relative movement of the male head and the female head in the axial direction. Through cooperation of the connecting clamping pin, the male head and the female head, the problem that the disassembly and assembly process of the quick-disassembly connector is tedious is effectively solved.

Housing structure for mounting a solenoid coil assembly for receiving the solenoid coil assembly that controls a flow path of a hydraulic device, comprising: a terminal clamping area forming a terminal clamping opening designed to be coupled to a terminal of the solenoid coil assembly; wherein the terminal clamping area has profiles that are formed in the terminal clamping opening in order to be in contact with the terminal over a flat surface.

A valve unit for an ABS system having a single hydraulic chamber configured to receive a brake fluid, with a delivery port for supplying the brake fluid to a brake caliper, and a passage to for letting the brake fluid from a master cylinder into the single hydraulic chamber is provided. A single piston, longitudinally movable within the single hydraulic chamber, has first transverse surfaces facing the delivery port and defining as a whole a first transverse area, second transverse surfaces facing away from the delivery port and defining as a whole a second transverse area greater than the first transverse area. A longitudinal cavity extends in the single piston establishing fluid communication between the first and second transverse surfaces, whereby displacement of the single piston towards the delivery port occludes the passage and increments the volume available for the brake fluid in the single hydraulic chamber.

A fastening device for a vehicle disc brake having a brake carrier includes holding fixture formed in the brake carrier for receiving a speed sensor. The brake carrier includes fastening members for mounting to a flange of the vehicle. The speed sensor is used for an anti-lock braking system to detect wheel slip. The holding fixture is in the form of a bore. The bore may be formed in the strut facing the axle or in an extension of one of the fastening members of the brake carrier. The speed sensor is aligned in its extension direction axially with an exciter in or on the brake disc or in the axle. The speed sensor is attached to a cable that does not need to be guided past the vehicle flange.

A safety warning device for deactivated driver assistance systems, hereinafter referred to as SWEFF, is characterized in that, when driver assistance systems (e.g., ABS (Anti-lock Braking System), TC (Traction Control), Slide Control, Wheelie Control, Engine Brake Control, ESP (Electronic Stability Program), Traffic Sign Recognition, Emergency Brake Assist, Lane Keeping Assist, etc.) are deactivated, the entire display or parts of the display flash (at least once) and / or an acoustic signal sounds at least once and / or a voice output is given at least once (e.g., via loudspeaker and / or a communication system in and / or on the helmet). The flashing and / or the acoustic signal and / or the voice output can be repeated after a certain period of time.This repetition can be prevented by the driver through various actions (e.g., pressing a control button and / or touching a touchscreen (e.g., display) and / or by voice input (e.g., via a microphone) and / or in a menu (software)). In vehicles with analog instruments, the instrument lighting or parts of the instrument lighting and / or at least one indicator light may flash. There may then be a separate indicator light for each driver assistance system.

Provided is an anti-lock braking system for a vehicle. The anti-lock braking system includes a hub having a hollow cavity which is configured to accommodate an axle, a device having a first part which is substantially static relative to the hub and a second part which may rotate relative to the hub when the first part and the second part are disengaged, and an actuator which is configured to control a transmission of a braking force from a frame of the vehicle to the hub by actuating the device, wherein one of the first part and the second part is configured to extend helically around the axle.

The application discloses a kind of composite brake anti-lock control system and method, belong to the technical field of automobile brake anti-lock system, a kind of composite brake anti-lock control system, including sensor unit, wheel slip rate deviation calculation unit, electronic mechanical brake ideal braking torque calculation unit, power motor controller assembly and anti-lock braking system assembly;The power motor controller assembly is connected with four power motors, each the power motor is connected with corresponding electronic mechanical brake, anti-lock braking system assembly includes fuzzy PID controller, composite braking system and torque distribution unit.The application detects when wheel slip rate has the tendency of lock, first macroscopically adjusts electronic mechanical braking force to the vicinity of road adhesion limit, while using fuzzy self-tuning PID control to adjust small range to regenerative braking torque, wheel speed fluctuation is very small in whole braking process, and vehicle has good braking smoothness.

The invention provides a brake control method and device, a storage medium, a vehicle controller and a vehicle. According to the brake control method, in the anti-lock braking process of the vehicle, the remaining amount of brake fluid in a brake master cylinder is monitored in real time, and when the remaining amount of the brake fluid is smaller than a brake fluid threshold value, a brake fluid supplementing function is started; the brake fluid supplementing function is used for supplementing the brake fluid in the reservoir into the brake master cylinder, determining a real-time brake demand corresponding to the anti-lock brake system during the operation period of the brake fluid supplementing function, controlling the driving motor to generate a motor brake torque corresponding to the real-time brake demand in response to the real-time brake demand, and controlling the motor brake torque to brake the brake master cylinder. Therefore, the braking effect of the vehicle during anti-lock braking is ensured.

A method is for controlling an ABS brake system. A trailer control pressure is transmittable via a trailer control valve to a trailer to trigger trailer wheel brakes as a function of the trailer control pressure. The trailer control pressure for implementing a stretch brake function or an auxiliary brake function is delivered as a function of a position of an operating element. The method includes: determining a position of the operating element; determining a trailer target pressure as a function of the position; generating and delivering a trailer control pressure corresponding to the trailer target pressure to the control valve; determining an actual towing vehicle deceleration; reading a minimum deceleration associated with the determined position; and triggering brakes of the towing vehicle when the actual deceleration falls below the minimum deceleration read, such that the trailer control pressure does not change and the actual towing vehicle deceleration increases.

The invention relates to the technical field of vehicle braking control, in particular to a vehicle control method and system, a vehicle and electronic equipment. The control method comprises the steps that a dynamic load deformation rate model is constructed, and the dynamic load deformation rate model is used for quantifying a deformation rate value according to the real-time tire pressure and the tire temperature of a tire pressure monitoring system; when the deformation rate value exceeds a first deformation threshold value, a slip rate threshold value in the anti-lock braking system is corrected according to the deformation rate value; and brake pressure corresponding to a brake pedal is obtained, and when the deformation rate value exceeds a first deformation threshold value and the brake pressure exceeds a preset pressure threshold value, a hardness increasing request is sent to the suspension system. Through the application, the influence of the tire pressure and temperature change on the tire load state can be sensed in real time, the slip rate threshold value is adjusted through the deformation rate value, the control of the suspension system is realized, and the adaptability and response precision of the anti-lock braking system in a complex environment are effectively improved.

An electronic brake system includes: a master cylinder connected to a brake pedal; a hydraulic pressure supply device including a motor that generates a rotational force and a hydraulic piston movably accommodated in a pressure chamber, and configured to generate a hydraulic pressure by a movement of the hydraulic piston; a hydraulic control unit configured to control a flow of the hydraulic pressure transferred to a wheel cylinder from the hydraulic pressure supply device; a hydraulic block in which the master cylinder, the hydraulic pressure supply device and the hydraulic control unit are integrated; and a controller configured to control the motor and the hydraulic control unit, wherein, during an anti-lock braking system (ABS) operation, the controller is configured to generate vibration in the motor by supplying the motor with an excitation current for exciting the motor to notify a driver of the ABS operation by vibration of the brake pedal.

The present invention relates to an apparatus and method for controlling the regenerative braking torque of an electric vehicle. The electric vehicle is equipped with an anti-lock braking system (ABS). The apparatus and method can compensate for the regenerative braking torque of a drive motor based on a behavioral model of the electric vehicle, thereby minimizing the ABS from entering an operating range and maximizing the energy recovery rate through regenerative braking. The apparatus includes a disturbance extractor that extracts disturbances in a specific frequency band from the difference between the behavioral model and the actual behavior of the electric vehicle. The apparatus also includes a torque compensator that compensates for the regenerative braking torque based on the disturbances extracted by the disturbance extractor.

The utility model relates to the technical field of automobile brake system parts, in particular to an anti-lock brake system with enhanced heat dissipation performance, which comprises a hub, a brake disc, a wheel speed sensor, an ABS (anti-lock brake system) gear ring and a brake caliper. The wheel hub is used for installing wheels and is connected with a vehicle suspension system, the brake disc is connected to the wheel hub, the steering knuckle is installed on the wheel hub, the brake caliper is connected to the steering knuckle, the ABS gear ring is installed on the wheel hub, at least one wheel speed sensor is arranged on the steering knuckle, the detection end of the wheel speed sensor is aligned to the ABS gear ring, and the detection end of the wheel speed sensor is aligned to the ABS gear ring. The ABS gear ring comprises a bottom ring and teeth, and the teeth are located on the top of the bottom ring. The utility model solves the problem that the braking efficiency is attenuated due to the fact that heat cannot be effectively dissipated during emergency braking of the existing vehicle.

A utility vehicle includes a frame and a plurality of ground-engaging members supporting the frame. Each of the plurality of ground-engaging members is configured to rotate about an axle. The utility vehicle further includes a powertrain assembly supported by the frame and a braking system configured to operate in a normal run mode and an anti-lock braking mode. The braking system includes an anti-lock braking control module operably coupled to the plurality of ground-engaging members and configured to automatically engage the anti-lock braking mode in response to a predetermined condition.

The present disclosure relates to a vehicle control method, device, equipment and medium, and relates to the technical field of vehicles, and includes: in the process of downshifting of a vehicle, when a target gear of the vehicle is the second forward gear or a current gear is the second forward gear, detecting whether a preset output shaft speed switching condition is met; when it is detected that the output shaft speed switching condition is met, calculating a first output shaft speed based on a vehicle speed by an anti-lock braking system or a vehicle body electronic stability system of the vehicle; when the first output shaft speed meets a preset downshifting condition, controlling the vehicle to switch to a target gear or a preset gear; wherein the gear number of the preset gear is less than the gear number of the current gear. By using the above technical solution, the technical problem that the output shaft speed abnormally fluctuates due to hardware reasons when the vehicle is stationary, so that the downshifting point cannot meet the downshifting requirement and downshifting processing cannot be performed is solved, and downshifting is forcibly performed under the condition that the current vehicle downshifting condition is met.