1602 results about "Vehicle braking" patented technology

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 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 invention relates to a vehicle braking method based on a road adhesion coefficient, and the method comprises the steps: 1, carrying out the real vehicle data collection, and punching a uniform timestamp through a clock source; 2, uniformly converting all the collected data into a vehicle coordinate system; 3, inputting the collected data into a preset deep learning regression model to obtain a predicted value of an attachment coefficient, generating a typical attachment coefficient representing the type of road, and adding the typical attachment coefficient into a preset road attachment coefficient query table; 4, the current road type is recognized, the corresponding typical attachment coefficient is called from the road attachment coefficient query table, the vehicle following distance is adjusted, and the braking deceleration is formulated; 5, analyzing to obtain the maximum adhesion potential of the current road surface; and 6, the original road adhesion coefficient is corrected, and the final braking deceleration is assigned to the current road so that the vehicle can conduct deceleration braking according to the assigned value.

The invention discloses a braking energy distribution method and system based on braking noise prediction and electronic equipment. The method comprises the steps that braking noise time sequence data, vehicle speed time sequence data, hydraulic braking torque time sequence data and pedal travel time sequence data of a current vehicle are obtained; inputting the braking noise time sequence data, the hydraulic braking torque time sequence data and the pedal travel time sequence data into a pre-trained braking noise prediction model to obtain a braking noise prediction value of the current vehicle after a preset time step; determining a corresponding braking noise threshold value according to the current working condition and the current driving mode of the current vehicle; and when the braking noise prediction value is larger than the braking noise threshold value, the braking energy distribution proportion is adjusted, so that the energy recovery torque is increased, and the hydraulic braking torque is reduced. According to the method, the braking noise of the vehicle is maintained below the threshold value through dynamic distribution of the braking energy, interference to users in the vehicle is avoided, the driving comfort of the vehicle is improved, and the method can be applied to the technical field of vehicle control.

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.

The invention discloses a comfortable braking cooperative control method capable of preventing slope sliding, which comprises the following steps of: firstly, preliminarily obtaining information of a slope where a vehicle is located, and then synchronously carrying out related compensation of a slope difference value and compensation of a vehicle attitude; and the minimum target deceleration required for preventing the vehicle from sliding on the slope and the damping force required for restraining pitching motion in the vehicle braking process are calculated, and the comfortable braking grade is selected. In the whole process, the ramp acceleration of the vehicle needs to be calculated in real time to obtain compensation, longitudinal and vertical control strategies are used for cooperative control, a brake-by-wire product is utilized, a non-adhesion coefficient is analyzed, braking force is distributed, load transfer is weakened through rear braking force during ramp parking, the pitching characteristic of the vehicle can be weakened under the non-emergency working condition, and the vehicle safety is improved. And the riding comfort of a driver and passengers is improved.

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 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 module vehicle transportation anti-collision monitoring system and method. The system comprises an environment sensing module, a data preprocessing module, a coordinate and time processing module, a data fusion and association module, a target tracking and prediction module, an anti-collision decision module, a collision early warning and safe distance module and an early warning and interaction module. The method comprises; the method comprises the following steps: 1, environment perception and data acquisition; step 2, data preprocessing and coordinate time synchronization; step 3, target association and data fusion; step 4, target tracking and prediction; 5, performing anti-collision decision and path planning; step 6, collision early warning and safe distance management; according to the method, factors such as driver response time, vehicle braking performance and road adhesion conditions are comprehensively considered, a corrected safety distance threshold formula is established, and the accuracy of collision early warning is remarkably improved by combining TrickSim and Simulink joint simulation verification.

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 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.

The utility model provides an anti-lock brake upper pump assembly. The anti-lock brake upper pump assembly comprises a pump support, an oil cup, a lining, a push rod, a pressure relief hole and the like. When the push rod moves, the auxiliary oil supply hole and the pressure relief hole are communicated or blocked, the multi-time snub effect is achieved, and wheel locking is avoided. By arranging the communicating oil supply hole, the circulating communicating hole, the pressure retaining valve rod and other structures, the oil flowing path is optimized, the braking response speed is increased, and the oil utilization rate is increased. Meanwhile, the design of a first limiting gasket, a reset spring, teeth and the like is adopted, and the stability and reliability of the braking system are enhanced. The assembly is compact in structure, good in braking effect and suitable for various vehicle braking systems.

The invention provides a vehicle control method, device and equipment, a vehicle and a system.The method is applied to roadside equipment, the roadside equipment comprises a roadside sensor, the roadside sensor is used for collecting moving state information of a target object within a preset range, and the method comprises the steps that according to the collected moving state information of the target object, the target object is determined to be a target object; predicting a first moving track of the target object in a first preset time period; receiving a second moving track sent by the target vehicle; according to the first moving track and the second moving track, the collision risk of the target object and the target vehicle is predicted; and sending a vehicle decision instruction corresponding to the collision risk to the target vehicle, so that the target vehicle determines a vehicle control strategy according to the vehicle decision instruction. The moving state information is collected through the roadside sensor, the blind area problem of the vehicle-mounted sensor is avoided, sufficient response time can be reserved for the target vehicle, and therefore the intervention opportunity of braking of the target vehicle is advanced, and the collision risk is reduced.

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 discloses an EPB motor control system and control method based on H-bridge driving, and belongs to the field of vehicle braking, the EPB motor control system comprises a power module, a control module, an H-bridge driving module and an EPB motor, the control module is connected with the EPB motor through the H-bridge driving module, the EPB motor control system is further integrated with a self-checking module, and the self-checking module is used for collecting working current and voltage signals of the EPB motor in real time; collected data are fed back to the control module; and the control module is configured to receive an external instruction and feedback data of the self-checking module, dynamically correct the duty ratio of the PWM signal output to the H-bridge driving module through a closed-loop adjustment algorithm, and realize closed-loop control of the rotating speed and the torque of the EPB motor. By the adoption of the EPB motor control system and method based on H-bridge driving, closed-loop precise control over the rotating speed and torque of the EPB motor is achieved, meanwhile, a multi-dimensional safety protection system is constructed, and control precision and operation reliability are both considered.

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.

A method for controlling a hydraulic motor vehicle braking system, wherein brake pressure is to be built up at wheel brakes on a front axle and a rear axle by means of via an electric pressure supply device based on a brake demand variable. Inlet valves of the wheel brakes on the front axle and rear axle are open and a brake demand variable is implemented by joint pressure build-up on the front axle and rear axle in the case of no fault. In the event of a fault with a degradation of the pressure supply device, the pressure build-up is first applied to the front axle by closing the inlet valves of the wheel brakes of the rear axle before or at the start of volume delivery. When a condition is met, the wheel brakes on the rear axle are activated by opening the inlet valves.

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 discloses a pre-judgment type braking force dynamic distribution method based on multi-source sensing fusion, and belongs to the field of vehicle braking, and the method comprises the following steps: S1, multi-source sensing data acquisition and preprocessing: synchronously acquiring vehicle state data and road conditions; s2, on the basis of the vehicle state data and the road condition collected in the step S1, the braking force requirement is recognized in advance through feed-forward logic, and feed-forward braking torque is determined; s3, based on the real-time braking state, feedback braking torque is determined through a PID algorithm; and S4, the feedforward braking torque and the feedback braking torque are fused through dynamic weight distribution, and a four-wheel unified pre-judgment type synthetic braking force torque is generated. By adopting the pre-judgment type braking force dynamic distribution method based on the multi-source sensing fusion, a real-time sensing layer is constructed through the multi-source sensing fusion, a feedforward-feedback double-loop controller and a curve pre-execution mechanism are designed, efficient and accurate dynamic distribution of braking force is achieved, and the braking performance and stability of a vehicle are remarkably 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.

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 relates to the technical field of automobile hub manufacturing, in particular to an automobile hub capable of actively reducing wind resistance. Comprising a wheel rim, a spoke frame is fixedly connected to the wheel rim, a transmission rod is fixedly connected to the spoke frame, a friction disc is fixedly connected to the transmission rod, calipers are arranged on the friction disc, the transmission rod is rotationally connected with a limiting plate, a wind blocking frame is fixedly connected to the limiting plate, and a supporting ring is fixedly connected to the wind blocking frame. The supporting ring is rotationally connected with the wheel rim, the transmission rod is slidably connected with extrusion frames distributed in an array mode in the circumferential direction, and tension springs distributed in a mirror image mode are arranged between the extrusion frames and the transmission rod. According to the hub, the air blocking frame is matched with the spoke frame, the air inlet state of the rim is adaptively switched according to the specific driving state of an automobile, so that the hub gives consideration to'low wind resistance 'at high moving speed and'efficient heat dissipation' at medium and low moving speed, and the stability of an automobile braking system is guaranteed while the endurance of the automobile is improved.

A brake control system for a vehicle includes electropneumatic modules that control fluid pressure to brake actuators for wheel brakes to apply and release service and parking brakes. A parking brake controller (i) determines whether the parking brake is in an applied state or a released state, (ii) whether a speed of the vehicle meets a predetermined condition relative to a predetermined speed and (iii) whether a command to move the service brake to an applied state has been issued by a service brake controller. When conditions (i), (ii) and (iii) are present, the controller identifies an absence of communication on a communications bus indicative of a failure in the service brake controller and / or the communications bus and thereafter generates a control signal configured to cause to move the parking brake from the released state to an applied state.

A verification system (100) for a vehicle's braking system is described. The system includes a brake pipe (104) for fluid conveyance, a brake cylinder (106) to hold fluid, and adjustment means (108) to modify fluid pressure in the brake cylinder (106) based on the brake pipe (104) pressure and a set relation pattern. Braking means (110) apply force depending on the fluid pressure in the brake cylinder (106). The verification system features a rotary electric generator (112) linked to an axle (A) and first electronic processing means (114) to assess fluid pressure in both the brake pipe (104) and brake cylinder (106). It identifies damage or malfunction if the pressure relationship deviates from the predetermined pattern. Rotary electric generators (112, 202) supply power to electronic processing means (114, 200) when there is no electrical power received by the electronic processing means (114, 200) from offboard the vehicle.

The invention provides a vehicle chassis domain controller and a vehicle. The vehicle chassis domain controller comprises at least one single chip microcomputer, a motor driving module and a shock absorber electromagnetic coil driving module. The input end of the motor driving module is connected with the single-chip microcomputer, the output end of the motor driving module is connected with a motor in a vehicle brake circuit, and the motor driving module is used for driving and controlling the working state of the motor so as to adjust the brake pressure of wheels. The input end of the shock absorber electromagnetic coil driving module is connected with the single-chip microcomputer, the output end of the shock absorber electromagnetic coil driving module is connected with a shock absorber, and the shock absorber electromagnetic coil driving module is used for driving and controlling the target current of an electromagnetic coil of the shock absorber according to the first driving control signal received from the single-chip microcomputer so as to adjust the damping force of the shock absorber. The motor driving module and the shock absorber electromagnetic coil driving module are integrated in one controller, so that the performance of the electric control shock absorber system can be improved, and meanwhile, the original functions of the electric control braking system and the electric control shock absorber system cannot be influenced.