1376 results about "Vehicle brake" patented technology

The invention relates to the technical field of path planning, in particular to an intelligent automobile path planning method and system. The method comprises the following steps of: extracting obstacle orientation and vehicle braking state information in an emergency avoidance process through an intelligent vehicle control center, and performing attitude transverse phase plane instability analysis to obtain an attitude phase plane instability state of a vehicle. Based on the state and the direction of the obstacle, analyzing and generating a collision attitude track; thirdly, matching emergency avoidance safety braking parameters through a collision posture prediction track, and ensuring safety braking; and finally, collision avoidance path planning learning is carried out by utilizing the avoidance braking safety matching parameters and the collision attitude prediction trajectory, and a safe and effective collision avoidance path is generated. According to the invention, the path planning technology is optimized, so that the path planning technology is more perfect.

The invention discloses a vehicle braking pitching control method, a controller, a vehicle and a storage medium, and belongs to the technical field of automobiles. The method comprises the following steps: acquiring braking data of a target vehicle; under the condition that it is determined that the braking pitching event occurs, a target braking pitching control mode is determined based on the braking data; generating a target pitching control parameter based on the target braking pitching control mode; the target pitching control parameters comprise target suspension damping, target suspension rigidity, target impact degree, target total braking force, target front axle braking force and target rear axle braking force; and controlling the braking process of the target vehicle based on the target pitching control parameter. According to the vehicle braking pitching control method disclosed by the invention, the control effect of the vehicle braking pitching phenomenon is improved.

The invention discloses a vehicle braking energy recovery method and device, a vehicle and a storage medium. The method comprises the steps that under the condition that a current vehicle is in a braking mode, the real-time acceleration and the brake pedal depth of the current vehicle are obtained; determining a target deceleration of the current vehicle based on the brake pedal depth; calculating the total required braking force of the current vehicle based on the target deceleration and the real-time acceleration; the maximum value of regenerative braking force of the current vehicle is determined, and the upper limit of the regenerative braking force is obtained; determining a target regenerative braking force based on the total demand braking force and a regenerative braking force upper limit; and the motor output torque of the current vehicle is determined according to the target regenerative braking force, and braking energy recovery is conducted based on the motor output torque. According to the technical scheme, the braking energy recovery efficiency of the vehicle is improved.

The bogie weighing device comprises a weighing valve and a force transmission mechanism, an air inlet of the weighing valve is communicated with an auxiliary air cylinder, an air outlet of the weighing valve is communicated with a distribution valve in a vehicle braking system, the weighing valve is fixed to a framework of a vehicle bogie, and the force transmission mechanism is connected with the framework and can rotate around a connecting point. One end of the force transmission mechanism is connected with the weighing valve, and the other end of the force transmission mechanism is connected with the hanging bracket. Stepless regulation of vehicle braking can be achieved.

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 discloses an enhanced braking system for a mountain railway vehicle, which relates to the technical field of railway vehicle braking control, and comprises the following steps: acquiring a rail position vector and an arc length, calculating a rail curvature and a rail gradient, and combining the current speed and the target speed of the vehicle to solve a braking demand acceleration value and generate a gradient parameter and a curve parameter; according to the braking force distribution proportion, a wheel rail hydraulic braking torque value is adjusted, the meshing depth and the vibration frequency of a rack rail brake are controlled through a rack rail action instruction, and a wheel rail system state report and a rack rail work log are generated; and gradient parameters, actual adhesive force numerical values and toothed rail meshing efficiency in the braking process are extracted from a wheel-rail system state report and a toothed rail work log, and closed-loop optimization is carried out in combination with a terrain braking curve. Self-learning and self-adaptive adjustment are carried out on the braking process through closed-loop feedback and parameter optimization, so that the energy utilization efficiency is improved and the service life of key components is prolonged while the braking efficiency is guaranteed.

A brake pad set (22) for disc brakes is shown, comprising an inner brake pad (24) and an outer brake pad (26). Each of the brake pads (22, 24) has a backing plate (28) and a brake lining (30, 32) attached to the backing plate (28), which comes into contact with a brake rotor during operation. The inner brake lining (30) and the outer brake lining (32) differ in size and preferably also in geometric shape in top view, wherein the wear volume of the inner brake pad (24) and the wear volume of the outer brake pad (26) differ by less than 10%. Furthermore, a vehicle brake (10) with such a brake pad set (22) is shown.

A grease filling method for a ball screw device includes the steps of covering an outer periphery of a screw shaft protruding from one end portion of a nut with a covering member, supplying grease to a portion between a nut inner peripheral surface on one end portion side of the nut and the screw shaft, inserting the protruding screw shaft into a nut inner side while being covered with the covering member, bringing a tip of the covering member in an insertion direction closer to an end portion of an infinite circulation path on the one end portion side of the nut, and sending the grease supplied to the nut inner side to a region of the infinite circulation path, pulling out the covering member together with the screw shaft from the one end portion of the nut, and taking out the covering member from the screw shaft.

The embodiment of the invention relates to the technical field of vehicles, and discloses a vehicle braking control method and device and a vehicle. The vehicle braking control method comprises the steps that under the condition that the vehicle is in a sliding state, an electric braking correction coefficient is determined based on road surface information and speed information of the vehicle; the road surface information is used for representing parameter values of road surface parameters influencing the braking performance; based on the electric braking correction coefficient and the maximum allowable electric braking torque of the sliding working condition of the braking motor, the target electric braking torque of the vehicle is determined; determining a hydraulic compensation torque based on a total braking torque of the vehicle and the target electric braking torque; and brake control is conducted on the vehicle based on the target electric brake torque and the hydraulic compensation torque. By means of the technical scheme, the target electric braking torque can be accurately matched with the road surface information and the speed information of the vehicle, and therefore the braking control accuracy is improved.

The invention relates to a vehicle braking control method and device, computer equipment and a storage medium. The method comprises the steps that in response to a braking instruction of a vehicle, target braking deceleration of the vehicle is determined according to braking pedal information and driving mode information of the vehicle; determining a target braking force and a target braking torque of the vehicle according to the target braking deceleration, the whole vehicle mass and the wheel rolling radius of the vehicle; under the condition that the target braking deceleration is larger than a preset deceleration threshold value, the mechanical braking torque of the vehicle is determined according to the target braking torque and the energy recovery torque; according to the real-time acceleration of the vehicle, the wheel static load is corrected, and the wheel dynamic load of the vehicle is obtained; according to the mechanical braking torque and the wheel dynamic load, the mechanical braking force of each wheel of the vehicle is determined; the mechanical braking force is used for controlling the vehicle to conduct mechanical braking, and the braking effect of the vehicle is improved.

The invention discloses a regenerative braking energy recovery method combining dynamic planning and model predictive control, which relates to the technical field of vehicle energy conservation, and comprises the following steps: establishing a dynamic model of a vehicle braking process, performing global energy recovery optimization based on dynamic planning, generating a global optimal reference trajectory, and adopting model predictive control rolling optimization. The reference trajectory is tracked to maximize energy recovery efficiency. According to the method, global optimum is guaranteed through dynamic planning, and meanwhile, the energy recovery efficiency of the regenerative braking process is improved by utilizing model predictive control.

The invention discloses a regenerative braking compound control method for an electronic mechanical braking system, and relates to the technical field of electronic mechanical braking. The defects in the prior art are overcome. The method specifically comprises the following steps: acquiring vehicle state information in real time; calculating a total required braking force and a current required deceleration areq based on a vehicle brake pedal signal; according to the vehicle state information, the currently available maximum regenerative braking force of the regenerative braking system is calculated in real time; calculating a dynamic distribution coefficient K1 based on the required deceleration, the vehicle speed, the wheel sliding rate and a vehicle stability control signal; carrying out braking force distribution according to a preset multi-level threshold strategy; based on the braking force distribution result, regenerative braking target force and compensation braking force instructions of all wheel ends of the EMB are generated; and feedforward-feedback composite control logic is established. The problems that in the composite braking process, braking force distribution is not smooth, switching is paused, and the energy recovery efficiency is not high are effectively solved.

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.

A brake actuator (10) is specified, in particular for an electromechanical vehicle brake, having a brake caliper (12) in which an intermediate space (14) is formed for a brake rotor, wherein a brake pad (16), which can be applied against the brake rotor, is arranged in the intermediate space (14), a brake piston (18) for applying the brake pad (16) against the brake rotor, a spindle drive (20) which comprises a spindle (22) which is driven by an electric motor and a spindle nut (24) which is mounted on the spindle (22) via a thread pair which is designed to be self-releasing, and a ball ramp mechanism (28) which comprises a first ramp body (30) which is mounted fixedly in terms of rotation and which has an actuating surface (32) which is oriented toward the brake piston, and a second ramp body (34) which is arranged between the first ramp body (30) and the spindle nut (24). The spindle nut (24) is axially applied by means of a spring (35) against the second ramp body (34) and this second ramp body is axially applied against the first ramp body (30). The brake actuator (10) also comprises an electric motor which is coupled in terms of drive via a gear unit (26) to the spindle (22), in order to apply the brake piston (18) against the brake rotor (16).

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.

An electromechanical brake actuator (10) for a brake of a vehicle (100) has a brake tappet (14) that can be moved substantially translationally for transmitting a compressive force (F) in the direction of a brake pad (6, 6′), a drive member (16) that generates a drive movement (A) and a coupling gear (18) that operatively connects the drive member (16) to the brake tappet (14). The coupling gear (18) converts the drive movement (A) of the drive member (16) into an adjustment movement (B) of the brake tappet (14). The coupling gear (18) has a coupling member (38) in contact with the brake tappet (14) that moves along a cam path (40, 60) and converts the substantially uniform drive movement into an adjustment movement (B) of the brake tappet (14) at, in portions, a non-uniform adjustment speed (B′).

The invention provides a method and device for estimating the abrasion degree of a vehicle brake pad and a medium, and belongs to the technical field of vehicles. The method comprises the steps that braking parameters are obtained, and the current remaining thickness of each wheel brake pad is estimated according to the braking parameters; and according to the current residual thickness of each wheel brake pad, the braking force distribution proportion and the braking duration of each wheel brake pad are dynamically adjusted, and whether the current residual thickness smaller than the set replacement threshold exists or not is judged. And when the current remaining thickness of the wheel brake pad is smaller than the set replacement threshold value, a warning mark corresponding to the wheel brake pad is generated. The brake pad abrasion loss is accurately calculated in real time, a user is reminded of the brake pad abrasion condition in time, the service life of a brake system is prolonged, and safety of the brake system is improved.

The invention discloses a clamping force estimation method for a data and model dual-driven electronic mechanical braking system, and relates to the technical field of intelligent vehicle brake-by-wire. The method comprises the following steps: establishing electronic mechanical braking system models and state observers thereof under different precisions; designing a clamping force estimator of the model-driven electronic mechanical braking system by combining an extended Kalman filtering method; after the input features are screened, designing a clamping force estimator of the data-driven electronic mechanical braking system in combination with a time sequence convolutional neural network; estimating values of the model driving estimator and the data driving estimator are fused in real time based on an adaptive weight fusion mechanism, and finally an estimation result with higher precision and higher robustness is obtained. According to the method, the interpretability and real-time advantages of a model driving method and the adaptive capacity of a data driving method to complex non-linear working conditions are fused, and the precision and robustness of clamping force estimation under multiple working conditions and noise interference are effectively improved under the condition that a force sensor is not needed.

The invention provides an energy recovery control method and device, a vehicle and a storage medium, and the method comprises the steps: monitoring the current driving working condition of the vehicle, and obtaining vehicle operation parameters, the current hydraulic braking force of vehicle braking and the current feedback braking force of a vehicle motor when the current driving working condition is a braking working condition; and the vehicle operation parameters, the current hydraulic braking force and the current feedback braking force are subjected to torque prediction through a pre-trained prediction model, target recovery torque is obtained, and a vehicle motor and a vehicle brake are controlled to output braking torque to a vehicle power system according to the target recovery torque. According to the method, it is monitored that the vehicle is in the braking working condition, the target recovery torque matched with the vehicle running parameters, the hydraulic braking force and the feedback braking force is rapidly and accurately predicted by combining the prediction model with the real-time vehicle running condition in time, cooperative control is conducted on a motor and braking through the recovery torque, and energy recovery with the maximum vehicle efficiency is achieved.

The invention provides a vehicle braking control method and system and electronic equipment, and relates to the field of vehicle braking control. According to the method, when a hydraulic braking system and a wheel speed sensor fail at the same time, vehicle state information can be obtained through an inertial sensor of a vehicle; and an accurate braking instruction is generated to control the parking brake to carry out emergency braking on the vehicle, so that the potential safety hazard that the parking brake cannot be controlled through an electronic hand brake to carry out emergency braking on the vehicle when a hydraulic braking system and a wheel speed sensor simultaneously fail in the prior art is solved.

The invention provides a vehicle control method, a vehicle control system and a vehicle, and relates to the technical field of vehicle control, the method comprises the following steps: obtaining road surface detection parameters of a current driving road surface of a target vehicle, the road surface detection parameters comprising a road surface adhesion coefficient; the current vehicle speed, the front wheel steering angle and the real-time yaw velocity of the target vehicle are obtained; according to the road adhesion coefficient, the current vehicle speed and the front wheel steering angle, the target yaw velocity of the target vehicle is calculated; according to the real-time yaw velocity and the target yaw velocity, the real-time yaw angle deviation of the target vehicle is determined; according to the real-time yaw angle deviation, the wheel longitudinal force of the target vehicle is adjusted, and the wheel longitudinal force comprises vehicle braking force and / or wheel driving force. According to the invention, the control of the vehicle is more accurate, so that the driving safety of the vehicle is improved.

The invention relates to the technical field of automobile detection devices, in particular to a motor vehicle brake performance detection device and method.The motor vehicle brake performance detection device comprises a base, a transmission chamber is formed in the base, and a bearing frame is rotationally connected to the inner wall of the transmission chamber through a rotating shaft. By means of the arranged protection mechanism, when a hydraulic rod stretches, under the action of a second connecting rod, the overturning frame overturns upwards, so that when braking of an automobile fails, the overturning frame can intercept wheels, the automobile is prevented from being separated from a base, more damage is prevented, meanwhile, the overturning frame drives an intercepting plate to overturn upwards, and the safety of the automobile is improved. And under the meshing action of the gear and the gear ring frame, the intercepting plate overturns upwards relative to the overturning frame, so that when braking of the automobile fails, the intercepting plate can intercept the automobile body, the intercepting effect is further improved, the situation that the automobile directly slides off from the bearing frame when braking of the automobile fails is avoided, and the safety and reliability of the device are greatly improved.

The invention provides a vehicle braking energy recovery method and device, electronic equipment and a storage medium, and relates to the technical field of vehicles, the braking state of a vehicle is judged according to brake pedal travel change information, if the braking state is an emergency braking state, the vehicle is controlled to adopt a first braking energy recovery strategy for braking energy recovery, and if the braking state is not an emergency braking state, the vehicle is controlled to adopt a second braking energy recovery strategy; if the braking state is a comfortable braking state, the vehicle is controlled to adopt a second braking energy recovery strategy for braking energy recovery, when the braking state of the vehicle is an emergency braking state, kinetic energy formed by deceleration is relatively large, at the moment, a high braking energy recovery coefficient is adopted for braking energy recovery, and otherwise, the braking energy is recovered. When the braking state of the vehicle is the comfortable braking state, kinetic energy formed by deceleration is relatively less, at the moment, braking energy can be recovered by adopting a relatively low energy recovery coefficient, and the overall braking energy recovery efficiency of the vehicle is improved through differentiated braking energy recovery strategies.

The invention relates to the field of lubricating oil, and discloses a brake fluid composition as well as a preparation method and application thereof, the brake fluid composition comprises boric acid ester, polyol ether, an antioxidant, a corrosion inhibitor, a metal deactivator and a pH regulator; the mass ratio of the boric acid ester to the polyalcohol ether to the antioxidant to the corrosion inhibitor to the metal deactivator to the pH regulator is (30 to 90) to (4 to 60) to (0.05 to 3.5) to (0.05 to 2.5) to (0.05 to 1) to (0.2 to 5). The brake fluid composition disclosed by the invention has excellent high-temperature performance, lubricating performance, low-temperature performance, viscosity-temperature performance, corrosion resistance and rubber matching performance, provides good functions of energy transfer, lubrication, sealing, corrosion and rust prevention and heat dissipation for an overrun brake system, and meets the use requirements of a racing track vehicle brake system under severe conditions; and a guarantee is provided for reliable operation of a braking system.

A 3-way solenoid valve, a vehicle brake system including the 3-way solenoid valve, and a controlling method for the same are disclosed. The present disclosure in at least one embodiment provides a brake system for a vehicle, including one or more wheel cylinders configured to apply braking pressure to each of wheels of a vehicle by using hydraulic pressure, one or more of the 3-way solenoid valve configured to increase or decrease the hydraulic pressure supplied to the one or more wheel cylinders, and a braking device configured to supply the hydraulic pressure to the one or more wheel cylinders by using a stepping force applied to a brake pedal or driving of a hydraulic pump.

The invention provides a dynamic braking element arrangement and control device for preventing a cruise vehicle from rolling, and relates to the technical field of vehicle braking control systems. The problems that in the prior art, when the complex overturning risk of a high-gravity-center vehicle is dealt with, risk sources cannot be distinguished, and control strategy switching is rigid are comprehensively solved. According to the method, the identification precision and response speed of the control system to overturning risks of different sources are improved, and the smoothness and precision of the control process are improved on the premise of ensuring the limit safety, so that the overall robustness and adaptability of the system in a complex and dynamic change scene are enhanced.

The invention relates to the field of brake-by-wire systems, and discloses a control method and system for an automobile brake-by-wire system, and the method comprises the steps: collecting motor operation parameters, environment state parameters and vehicle dynamics parameters; based on the environment state parameters and a pre-calibrated environment compensation parameter table, environment compensation is carried out on the motor current signal and the rotation angle signal; carrying out load correction on the motor current signal and the rotation angle signal which are subjected to environment compensation; identifying a current key characteristic time period and a corner key characteristic time period respectively; generating a system reliability verification coefficient based on cross validation of the current key characteristic time period and the corner key characteristic time period; calculating an actual clearance value between a friction plate and a brake disc based on a system reliability verification coefficient, the corner signal after load correction and a pre-calibrated mechanical transmission parameter; and outputting a brake system control instruction based on the calculated actual gap value.

Braking device for a vehicle, with a piezoelectric sensor (2) comprising: a piezoelectric material, two electrodes (6, 7), wherein the piezoelectric material comprises a first flat face (4) and a second flat face (5), the faces extending in parallel planes identified by two orthogonal y and z directions, wherein an electrical signal is collected by the electrodes when the piezoelectric material is simultaneously subjected to a normal force in an x-direction and to a shear force in the z-direction, wherein the first electrode is positioned on the first face and the second electrode is positioned on the second face and has extensions (7a, 7b) on the first face separated by the first electrode, wherein each of said extensions extends on a corresponding side of said first face, and wherein each of said extensions is symmetrically configured with respect to a central axis of the first face.

The invention relates to the technical field of vehicle braking control, and discloses a turning braking force distribution control method and system for a vehicle carrying an electronic mechanical braking system. The method comprises the following steps: acquiring real-time state information of a vehicle; initial braking force distribution is conducted on the vehicle; calculating an expected yaw velocity and an expected side slip angle of the vehicle by adopting a linear two-degree-of-freedom vehicle steady-state model; a torque adjusting controller is adopted to calculate the torque adjusting quantity of the yaw velocity and the torque adjusting quantity of the side slip angle; dynamically adjusting the torque adjusting quantity of the yaw velocity and the torque adjusting quantity of the side slip angle by adopting an error weight proportion distribution method to obtain an expected braking torque needing to be applied to a wheel; a compensation torque controller is adopted to calculate the slip rate compensation torque of each wheel; and secondary braking force distribution is conducted on all the wheels of the vehicle according to the expected braking torque of the wheels and the slip rate compensation torque of all the wheels. According to the method, yaw stability improvement, sideslip suppression and braking efficiency optimization of the vehicle in the turning braking process can be achieved.