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

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.

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 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 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.

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 invention relates to the technical field of vehicle control, and discloses a vehicle longitudinal deceleration control method, device and system and a vehicle. Under the working condition that the vehicle is located on a low-adhesion road surface and activates an anti-lock braking system for a long distance, if it is determined that main cylinder brake fluid in a hydraulic drive-by-wire braking system is insufficient, the vehicle longitudinal deceleration control method is started; if yes, the hydraulic brake-by-wire system is controlled to close a wheel side pressure release valve, and a main cylinder is controlled to supplement brake fluid; according to hydraulic braking information required by the hydraulic brake-by-wire system for achieving the expected braking effect under the current working condition, caliper braking information generated when a caliper of the electronic parking braking system is used for braking is generated; the caliper braking information comprises parameters when the electronic parking braking system is used for braking to achieve an expected braking effect; and based on the caliper brake information, brake control is performed through a caliper of the electronic parking brake system until the master cylinder reaches the completion condition of brake fluid supplement. The device has the beneficial effect that the braking efficiency of the liquid supplementing device is improved.

A valve unit for a bicycle anti-lock brake system. The valve unit (20) comprises an outer valve body (21) defining an axially elongated inner cavity (22) in which a piston valve member (23) is slidably driven. Three stationary annular sealing gaskets (31, 32, 33) mounted on the outer valve body within the inner cavity (22) and in sliding sealing engagement with the piston valve member (23); an upstream end sealing gasket (31), a downstream end sealing gasket (32), and an intermediate sealing gasket (33) are mounted within the interior cavity (22) between an inlet port (27) and an outlet port (26). The outer valve body (21) does not have to provide a sliding surface for moving the sealing gasket, and the outer valve body (21) may be made of a plastic material.

A method is provided for controlling a drive train (12) of a motor vehicle (10) having an electric drive motor (16, 17), a wheel (26, 27) driven by the electric drive motor (16), and an anti-lock braking system (30) for preventing the wheel from locking (26, 27). The method includes detecting an impending control intervention of the anti-lock braking system (30) and disconnecting a torque-transmitting connection from the electric drive motor (16) to the wheel (26, 27) when an impending control intervention of the anti-lock braking system (30) is detected. Also disclosed are a control device (60), a drive train (12), and a motor vehicle (10) configured to carry out such a method.

The invention relates to the technical field of vehicle braking, in particular to a wheel braking force output control method and a related device. The method comprises the steps that a brake pedal signal is received, and the expected braking force for the vehicle is determined according to the brake pedal signal; determining distributed braking force according to a preset braking force distribution rule; for each wheel, the actual braking force and the maximum allowable braking force are determined, and the minimum value is selected from the actual braking force, the maximum allowable braking force and the distributed braking force to serve as the target braking force of the wheel; acquiring an actual vehicle speed and a wheel speed; the slip rate of the wheels is determined according to the actual vehicle speed of the vehicle and the wheel speed of the wheels, and the braking force adjusting strategy of the wheels is determined according to the slip rate of the wheels, the actual braking force corresponding to the wheels and the target braking force of the wheels; and the target braking force of the wheels is adjusted according to the braking force adjusting strategies of all the wheels. According to the anti-lock braking system, the braking efficiency of the anti-lock braking system is improved, and meanwhile the locking risk of the wheels can be reduced.

The embodiment of the application provides an anti-lock braking system, which can not change the structure of a traditional anti-lock braking system, only add an electromagnetic valve, multiple sets of check valves and supporting control logic, so that the anti-lock braking system has the functions of auxiliary parking and the like, thereby maintaining a low cost and meeting more needs of users. The anti-lock braking system comprises an anti-lock braking control module, a brake master cylinder, an electromagnetic valve, a front wheel braking module, a rear wheel braking module and a check valve group. The anti-lock braking control module is used for sending an auxiliary parking signal to the electromagnetic valve, the front wheel braking module and the rear wheel braking module. The brake master cylinder is used for outputting a first set amount of brake fluid according to a brake pedal stroke. The electromagnetic valve is used for closing a first liquid outlet and a second liquid outlet and connecting a third liquid outlet in response to the auxiliary parking signal. The front wheel braking module and the rear wheel braking module are used for keeping the brake pressure of the front wheel and the rear wheel at a first set pressure value in response to the auxiliary parking signal.

This disclosure relates to a vehicle dynamics modeling method, apparatus, and electronic device based on a neural network. The method includes: acquiring real-vehicle test data for the current frame and corresponding historical set number of frames when the anti-lock braking system (ABS) is triggered, wherein the real-vehicle test data includes vehicle state variables and vehicle control variables; training the neural network using the control variables and vehicle state variables of the current frame and corresponding historical set number of frames to generate a neural network model with latency characteristics; and providing the neural network model to the vehicle's hardware-in-the-loop system as a real-time vehicle dynamics model. Therefore, in the ABS scenario, a vehicle dynamics model is constructed based on a neural network, simplifying and efficiing the process of establishing, debugging, and testing the vehicle dynamics model, and shortening the modeling cycle.

The application relates to the field of brakes, in particular to a reverse positioning mechanism for an anti-lock brake mechanism, a reverse positioning motor, an anti-lock brake and a vehicle. The reverse positioning mechanism for the anti-lock brake mechanism comprises a rotating shaft, a positioning assembly and a support connecting the rotating shaft and the positioning assembly. The positioning assembly comprises an elastic piece, a positioning seat and a positioning key. At least one one-way boss is arranged on the positioning seat. When the rotating shaft rotates forward, one end of the positioning key elastically abuts against the positioning seat and slides relative to the positioning seat. When the rotating shaft rotates reversely, the positioning key meets the one-way boss and brakes the positioning seat and the positioning key from sliding relative to each other. The positioning assembly brakes the rotating shaft from rotating. The reverse positioning mechanism for the anti-lock brake mechanism of the two-wheeled vehicle anti-lock system is reasonable in structure, safe and reliable, low in cost, ensures that the motor is started stably, and ensures that the anti-lock brake system operates stably.

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

The valve unit (20) comprises an outer valve body (21) with an axially elongated inner cavity (22) in which a main piston valve element (23) slides, separating an upstream chamber (25) from a downstream chamber (24). The main piston valve element (23) forms an inner axial channel (40) in which a secondary piston valve element (41) slides. An electric motor (28) causes simultaneous linear displacements of the main piston valve element (23) and the secondary piston valve element (41) in respective axially opposite directions. When in use, the upstream chamber (25) is in fluid communication with a driver-operated master cylinder. The volume available for brake fluid within the upstream chamber (25) remains constant, so the driver's hand on the brake control lever does not feel that the ABS system is operating.

This application provides a method and related equipment for determining the road surface adhesion coefficient. The method includes: determining the real-time longitudinal stiffness value of the vehicle's tires based on the vehicle's current state parameters, and determining a first wear coefficient of the tire based on the current tire image; acquiring newly added target parameters for the vehicle, including at least one of the vehicle's newly added travel distance, the number of newly added interventions of the anti-lock braking system (ABS) in the vehicle, and the number of newly added interventions of the anti-slip drive control system (ABS); correcting the first wear coefficient based on the target parameters to obtain a target wear coefficient, and correcting the real-time longitudinal stiffness value based on the target wear coefficient to obtain a target stiffness value; and determining the road surface adhesion coefficient of the road where the vehicle is located based on the target stiffness value and the longitudinal stiffness value of the tire in an undamaged state. This application improves the accuracy of determining the road surface adhesion coefficient.

The invention relates to a vehicle dynamics control method for all-wheel drive vehicles which, in the event of detected braking instabilities, combines a time-limited axle decoupling with software-controlled, alternately side-directed steering impulses. These impulses generate a changing wheel normal force shift, resulting in an asymmetrical brake force distribution. The process works independently of ABS or brake interventions, requires no additional hardware and can be implemented entirely via software using existing electronic control units. It enables adaptive, driving-condition-dependent stabilization and shortens the braking distance, especially on smooth or asymmetrical road surfaces (µ-split).

A valve unit (10) for an anti-lock braking system (ABS) includes a valve body (11), a piston (18) movable in the valve body, and a resilient element (34) acting on the piston. The valve body has an outlet port (14), an inlet port (17), a main chamber (15) in communication with the outlet port, an expansion chamber (16) having an outflow passage (51) effecting fluid communication between the main chamber and the expansion chamber, and a bypass passage (50) between the inlet port and the outlet port. The piston (18) is movable in the main chamber (15) and has a longitudinal through cavity (31). The piston has a first lateral surface facing away from the outlet port and a second lateral surface opposite the first lateral surface and facing away from the outlet port, wherein the area of the first lateral surface is less than the area of the second lateral surface. The resilient element (34) exerts a resilient force to move the piston (18) away from the outlet port (14). The valve unit (10) is activatable by pressure of brake fluid in the main chamber (15).

The invention relates to a method for controlling a drive train (12) of a motor vehicle (10) with an electric drive motor (16, 17), a wheel (26, 27) driven by the electric drive motor (16), and an anti-lock braking system (30) to prevent the wheel (26, 27) from locking up. The method comprises the following steps: - Detection of an impending intervention of the anti-lock braking system (30), - Disconnecting a torque-transmitting connection from the electric drive motor (16) to the wheel (26, 27) when an impending control intervention of the anti-lock braking system (30) is detected. The invention further relates to a control unit (60), a drive train (12) and a motor vehicle (10) which are equipped to carry out such a method.

Valve unit for bicycle anti-lock brake system. The valve unit (20) comprises an outer valve body (21) that defines an axially elongated inner cavity (22) from which a piston valve member (23) is slidably driven. Three stationary annular seal gaskets, namely an upstream end seal gasket (31), a downstream end seal gasket (32), and an intermediate seal gasket (33) mounted in the inner cavity (22) between the inlet port (27) and the outlet port (26), are mounted in the outer valve body within the inner cavity and slidably seal-coupled with the piston valve member (23). The outer valve body (21) does not need to provide a sliding surface for moving the seal gaskets and may be made of plastic material.

The invention relates to a control method for regenerative braking of a road vehicle (1), comprising the following steps for each driven wheel (4, 5): estimating a grip factor (G); defining or collecting a vertical load (Fz); calculating a maximum braking capacity (MRT) value from the grip factor (G) and the vertical load (Fz); after the braking request, controlling the braking system (13) to actuate the hydraulic unit (18) to apply a first braking torque (mBT) and to actuate each wheel in regenerative electric braking at least in accordance with 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) such that the sum thereof is equal to or less than the respective maximum braking capacity (MRT) value on time.

The embodiment of the application provides a vehicle control method and device based on estimated wheel speed, a vehicle and a storage medium, and belongs to the technical field of vehicle control. The method comprises the following steps: acquiring wheel speed sensing data of a current wheel sensor; performing data validity screening on the wheel speed sensing data to obtain abnormal wheel speed data and valid wheel speed data; screening an abnormal wheel sensor from the current wheel sensor according to the abnormal wheel speed data; performing type detection on the abnormal wheel sensor to obtain a sensor type of the abnormal wheel sensor; performing wheel speed estimation according to the sensor type and the valid wheel speed data to obtain wheel speed estimation data; and performing brake control on a preset brake system according to the wheel speed estimation data and the valid wheel speed data. The embodiment of the application can ensure that an anti-lock brake system normally works when a wheel speed sensor is damaged, and improves the stability of the vehicle.