56 results about "Electronic stability control" patented technology

The invention discloses a hardware-in-the-loop test method and device and electronic equipment, relates to the technical field of automotive electronics, and adopts a simulated annealing algorithm in an optimization stage, adjusts parameters according to characteristics of an electronic stability control system, optimizes data distribution, and improves test data quality and fault detection capability. In the verification stage, the generated test data is subjected to actual operation test, the data problem is fed back by comparing actual output with an expected result, and the optimized test data which does not pass verification is sent to the target hardware-in-loop test model for optimization adjustment, so that a closed-loop optimization verification process is formed. The iterative closed-loop process comprehensively covers all possible working conditions and fault modes, key test points are prevented from being omitted, the reliability of the electronic stability control system is enhanced, the accuracy, effectiveness, comprehensiveness and sufficiency of hardware-in-the-loop test of the electronic stability control system are ensured, and the reliability of the electronic stability control system is improved. And the limitation of hardware-in-the-loop test of the electronic stability control system is reduced.

The embodiment of the invention provides a wheel turning angle adjusting method of a vehicle, the vehicle and a storage medium, and relates to the technical field of vehicles. The method comprises the steps that in response to the condition that state information of a vehicle meets a preset condition, a rear wheel steering system auxiliary control function of the vehicle is started; when the auxiliary control function of the rear wheel steering system is in the starting state, the first weight of the rear wheel steering system, the second weight of the electronic stability control system and an operation strategy are determined based on the yaw velocity deviation of the vehicle; a rear wheel steering system and an electronic stability control system are operated according to the operation strategy, and in the operation process, the target rear wheel steering angle of the vehicle is determined based on the wheel slip rate and the first weight of the vehicle; a rear wheel steering angle of the vehicle is adjusted to the target rear wheel steering angle based on the execution constraint. The technical problems that in the prior art, braking intervention only depends on ESC, the yaw moment compensation capacity is limited, and energy loss is high are solved.

The invention relates to the technical field of vehicle control, and discloses a self-adaptive cruise control method and system, a vehicle and a storage medium which are applied to a pure electric vehicle, and the method comprises the steps that according to driving state information of a front target vehicle and dynamic parameters of the vehicle, the target deceleration of the vehicle is determined in combination with a safe vehicle following distance model; when it is judged that the pure electric braking condition is not met based on the relation between the target deceleration and the braking force threshold value of the electric braking system and in combination with the real-time battery state of the vehicle, a cooperative braking mode is started; in the cooperative braking mode, the electric braking system is controlled to provide regenerative braking force, and a cooperative braking instruction is sent to the electronic stability control system, so that the electronic stability control system provides mechanical braking force for cooperative braking; the electronic stability control system further adjusts mechanical braking force distribution of all wheels of the vehicle based on the vehicle wheel speed and the vehicle body posture parameters so as to maintain stable running of the vehicle.

The application discloses a vehicle deceleration braking method, comprising the following steps: sending braking request information to an electronic parking brake system; in response to the received braking request information, sending a deceleration braking signal to an electronic brake booster through the electronic parking brake system; in response to the received deceleration braking signal, activating an electronic control deceleration function by using the electronic brake booster, and actively pressurizing a brake pipeline of the vehicle by using the electronic brake booster through a preset braking execution mode, so that the vehicle realizes deceleration braking. The vehicle deceleration braking method provided by the application can realize the electronic control deceleration function and achieve the purpose of safe deceleration parking on a vehicle without a vehicle body electronic stability control system, only by using the electronic parking brake system and the electronic brake booster.

Electro-hydraulic braking system with: several wheel brake arrangements designed to deliver braking forces to wheels; an electric brake booster with a motor to amplify a pedal force applied to a brake pedal; an electronic stability control (ESC) system comprising a pressure sensor for measuring hydraulic pressure and designed to open or close several valves arranged therein in order to distribute the hydraulic pressure to the multiple wheel brake assemblies; and an electronic control unit (ECU) designed to control a motor drive current within a range of current values ​​less than or equal to a first limiting current when the hydraulic pressure measured by the pressure sensor is less than or equal to a first reference value, and to control the motor drive current within a range of current values ​​greater than the first limiting current and less than or equal to a second limiting current when the hydraulic pressure is higher than the first reference value.

This application provides a vehicle control method and system. The method includes: an electronic stability control system (ESC) on a target vehicle acquiring the vehicle speed and lateral acceleration information of the target vehicle; the ESC determining the current motion condition of the target vehicle based on the vehicle speed and lateral acceleration information; when the current motion condition is a low-dynamic condition, the motor controller on the target vehicle performing torque reduction control to suppress vehicle slippage when it detects slippage; when the current motion condition is a high-dynamic condition, the vehicle controller on the target vehicle acquiring the driver's required torque and the ESC-calculated torque reduction torque; and performing corresponding control operations based on the driver's required torque and the ESC-calculated torque reduction torque. Therefore, this method and device can reduce response delay, thereby improving the speed of torque response and reducing the degree of vehicle slippage.

Disclosed is a brake system. The brake system includes: an electronic control unit configured to perform an attitude control function based on a wheel speed sensor value received from each of a plurality of wheel speed sensors installed in a plurality of wheels of a vehicle, identify a failure of the attitude control function, and provide a braking signal to perform the attitude control function according to the identified result; and a brake configured to perform a braking control on a corresponding wheel based on the braking signal, wherein the electronic control unit is configured to identify a failure of at least one of the plurality of wheel speed sensors while performing the attitude control function, and set an operation mode of an Electronic Stability Control (ESC) according to the identified result.

The present examples provide systems and methods for performing hydraulic braking in a vehicle. A system includes a set of hydraulically controlled brakes, a set of valves coupled with the set of brakes and configured to regulate hydraulic pressure applied to the brakes, a first hydraulic system (including a primary hydraulic pressure generator and a first controller), and a second hydraulic system (including a backup hydraulic pressure generator and a second controller). The first controller is configured to receive sensor data. Based on sensor data, the first controller determines a magnitude of hydraulic pressure applied to each hydraulic control brake, sends a pressure command to the main hydraulic pressure generator to generate hydraulic pressure, and sends a valve control command to the second controller using a high-speed communication connection.

An apparatus and method for controlling residual pressure in an electronic stability control (ESC) integrated brake system are disclosed. The apparatus for controlling residual pressure in an ESC integrated brake system of the present disclosure includes: a master cylinder configured to generate brake hydraulic pressure through a master piston; a hydraulic pressure regulating valve configured to regulate hydraulic pressure, in which the hydraulic pressure regulating valve is provided in a hydraulic pressure flow path connected between the reservoir and a wheel cylinder configured to perform braking of each wheel; and a processor configured to: adjust a position of a master piston of the master cylinder according to whether the master cylinder satisfies a preset residual pressure control activation condition; and controls the hydraulic pressure regulating valve based on the required pressure of the master cylinder and the loop pressure.

The invention discloses a detection device and method for an anti-lock and electronic stability control system assembly. A lifting assembly comprises a supporting plate, a mounting plate and a first driver arranged on the supporting plate. The mounting plate is arranged on the upper side of the first driver; a probe is arranged on the lower side of the pre-pressing plate; the pre-pressing assembly comprises a clamp, a tool plate and a pre-pressing plate, the clamp and the tool plate are arranged on the mounting plate at intervals, the pre-pressing plate is arranged at the tail end of the clamp, a plurality of first inserting holes are formed in the tool plate, the first inserting holes are matched with connectors of the anti-lock and electronic stability control system assembly, and the pre-pressing plate is matched with the tool plate; and the probe is matched with a socket at the lower end of the connector. The connector is fixed on a first jack of the tool plate through a pre-pressing plate of the pre-pressing assembly, and the connector is driven by the lifting assembly to move downwards to be tightly jointed with a probe of a testing mechanism on the lower side of the detection main body; the contact points of the connector can be automatically aligned, effective contact of the contact points of the probes is ensured, the detection efficiency is improved, and the equipment maintenance frequency is reduced.

An embodiment method for transmitting speed information of a vehicle using an apparatus for transmitting speed information of the vehicle includes receiving a first speed information of the vehicle from an electronic stability control (ESC) device, the first speed information being information based on a plurality of wheels of the vehicle, averaging the first speed information, converting the averaged first speed information into a second speed information of the vehicle, based on a first period, and outputting the second speed information, based on a second period and a minimum output frequency, in which the first speed information is a digital signal and the second speed information is an analog signal.

The invention discloses a braking system, a braking method and a vehicle. The braking system comprises a first power supply and a second power supply which are independently arranged; and an electronic parking controller, a DC voltage converter, a drive-by-wire hydraulic brake controller, and an electronic stability controller. Wherein the electronic parking controller is configured to be powered by one of the first power source and the second power source, and the direct-current voltage converter is connected with the first power source and used for converting a first voltage value output by the first power source into a second voltage value smaller than the first voltage value. According to the technical scheme, on one hand, the function risk of the braking system is effectively dispersed, and the problem of single-point failure caused by the fact that functions are excessively concentrated on a single controller is avoided; and on the other hand, through power redundancy and voltage conversion, the system can adapt to the arrangement limitation of a 48V electrical architecture, meanwhile, the cooperative work between the controllers is optimized, the waste of hardware resources is reduced, and the reliability and safety of the system under complex working conditions are improved.

The embodiment of the invention provides a leakage isolation method and device for a hydraulic braking system, relates to the technical field of vehicle braking and is suitable for an electronic stability control system, the hydraulic braking system comprises a plurality of braking loops, and the method comprises the steps that it is determined that brake fluid leakage happens to the hydraulic braking system; based on a preset braking method, the multiple braking circuits are subjected to leakage testing, the testing result of each braking circuit is obtained, the preset braking method is used for simulating vehicle braking through the braking circuits to be tested, and the testing results are used for representing whether braking fluid leakage happens to the corresponding braking circuits or not; and when the vehicle is braked, based on the test results of all the brake circuits, the brake circuits with leakage are isolated, so that the brake circuits with leakage do not participate in vehicle braking. By the adoption of the method, when the hydraulic brake system leaks brake fluid, the leakage point can be isolated in time, the remaining effective brake loop is used for braking, and the brake performance of a vehicle is guaranteed.

A brake system comprises an electronic stability control (ESC) module defining a first interconnect passage, and a pressure supply unit (PSU) module defining a second interconnect passage in fluid communication with the first interconnect passage. The ESC module includes a first pump configured to transfer brake fluid from the PSU module and to a plurality of wheel brakes, and a prime valve configured to selectively control fluid communication between the first interconnect passage and an inlet of the first pump. The PSU module includes a second pump configured to transfer the brake fluid from a fluid reservoir to the first interconnect passage, and a bypass fluid passage from the fluid reservoir to the ESC module with an inline check valve allowing fluid flow through the bypass fluid passage from the fluid reservoir and to the ESC module while blocking fluid flow in an opposite direction.

The invention provides an optimization method, device and equipment for brake control in the vehicle cruising process and a medium, and relates to the technical field of vehicle control. The optimization method comprises the steps that multi-source sensor data collected by a plurality of sensors installed on a main vehicle are obtained; identifying the current driving condition of the host vehicle based on the multi-source sensor data, wherein the driving condition at least comprises a vehicle cut-in condition; and under the condition that the vehicle cut-in working condition is recognized, a braking control strategy corresponding to the vehicle cut-in working condition is executed, so that the electronic stability control system conducts braking operation on the main vehicle based on the braking control strategy. According to the method, the key working condition of vehicle cut-in is introduced and recognized, and therefore the braking strategy of the electronic stability control system is optimized.

This application provides a combined navigation and positioning system, method, vehicle, and computer-readable storage medium. The combined navigation and positioning system includes: an electronic stability control module for outputting a first output signal, the first output signal including a first sensing signal output by a first inertial unit in the electronic stability control module; and a combined navigation module for receiving the first output signal and fusing it with a second sensing signal output by a second inertial unit in the combined navigation module, the combined navigation module performing positioning and navigation based on the fused signal. In this application, the first sensing signal of the first inertial unit of the electronic stability control module can be fused with the second sensing signal of the second inertial unit of the combined navigation module to reduce the cumulative error of the fused signal, thereby improving the positioning accuracy of the combined navigation module.

The invention discloses a simulation detection analysis method and system for vehicle body electronic stability control, and belongs to the technical field of simulation detection. Pressure limiting valve sealing data, wheel speed sensor data and road holding sensing data of the vehicle body electronic stability control system are collected; constructing a fault mode database of a single operation time period corresponding to the test scene; obtaining a fault mode database of all the operation time periods, and predicting the probability that a pressure limiting valve sealing failure fault, a wheel speed sensor drifting fault and a road holding force sensing abnormal fault occur at the same time in the next operation time period of the test scene; if the pressure-limiting valve sealing failure fault, the wheel speed sensor drifting fault and the road holding force sensing abnormal fault occur at the same time, brake stability parameters of the test scene in the next operation time period are calculated; according to the method, the electronic stability state of the vehicle body is monitored, a threshold value is preset, analysis and early warning are carried out, comprehensive monitoring of the electronic stability state of the vehicle body and simulation strategy self-adaptive adjustment are finally achieved, and the accuracy and safety guarantee capacity of simulation detection are improved.

Disclosed herein is an electric brake system including a brake including a cylinder and a piston which is provided in the cylinder to move forward or backward and is moved by hydraulic pressure so that a brake pad presses a brake disc, an electric stability control (ESC) actuator configured to generate and supply hydraulic pressure to the cylinder to brake a wheel of a vehicle, an electric parking brake (EPB) actuator configured to move the piston by a motor, and a controller configured to control the EPB actuator and the ESC actuator, wherein the controller estimates a flux in the cylinder and estimates pressure in the cylinder based on whether an EPB is applied through driving of the EPB actuator and the estimated flux in the cylinder.

The invention relates to a vehicle system (100) for a vehicle (200), in particular a commercial vehicle (202), having an electronically controllable pneumatic brake system (101) and an electronically controllable steering device (103). The electronically controllable pneumatic brake system (101) has a redundant control unit (104) which, in the event of a failure of an electronic stability control (ESC1) of the brake system (101) during driving, controls the brake circuits (2, 4). In the event of a failure of the electronic stability control (ESC1) during driving, the redundant control unit (104) actuates the front axle (VA) with a front axle redundant brake pressure (pRVA) and / or the rear axle (HA) with a rear axle redundant brake pressure (pRHA) in terms of the axles, and the electronically controllable steering device (103) carries out a steering intervention for lateral stabilization for keeping the vehicle (200) within a tolerance corridor (TK) of a predetermined target trajectory (TSoll) of the vehicle (200). The invention also comprises a vehicle (200) and a method (300).

This invention discloses a method for vehicle low-voltage shielding, belonging to the field of voltage shielding technology, including the following steps: S1 determining the vehicle's power source and determining a low-voltage state; S2 determining whether the conditions for entering the shielding state are met based on the result of step S1 and the current vehicle condition. If met, the vehicle enters the shielding state and continues to step S3; otherwise, step S2 is repeated; S3 determining whether the vehicle meets the conditions for exiting the shielding state based on the current vehicle condition. If met, the vehicle exits the shielding state; otherwise, step S3 continues. This low-voltage shielding strategy reduces the problem of frequent ESC errors caused by low voltage before vehicle startup, improving the driver's experience. Simultaneously, in terms of fault code (DTC) recording, it accurately records the real reasons causing the ESC function to be unusable, facilitating real-vehicle problem troubleshooting. It also provides a design basis for subsequent Electronic Stability Control (ESC) software development.

The application discloses a master cylinder pressure estimation method and system based on wheel states, which is applied to an electronic stability control system and comprises the following steps: detecting the effectiveness of a master cylinder pressure sensor signal; if the master cylinder pressure sensor signal is effective, using the collected value of the master cylinder pressure sensor as a current master cylinder pressure estimation value; if the master cylinder pressure sensor signal is ineffective, judging whether antilock braking control is triggered; if the antilock braking control is not triggered, estimating the master cylinder pressure based on the whole vehicle deceleration; if the antilock braking control is triggered, judging whether the current is in the first antilock braking control cycle; if the current is in the first antilock braking control cycle, estimating the master cylinder pressure based on the maximum wheel deceleration of the current cycle; if the current is not in the first antilock braking control cycle, judging the wheel braking state based on at least one wheel state parameter of the current cycle, correcting the master cylinder pressure estimation value according to the judgment result, using the corrected master cylinder pressure estimation value as the current master cylinder pressure estimation value; and outputting the current master cylinder pressure estimation value for brake control.

The utility model relates to a split charging table which is used for assembling an automotive electronic stability control system, the automotive electronic stability control system comprises a main body part and a plurality of pipelines, and the main body part is provided with a connecting side used for being connected with the pipelines. The split charging table comprises a table top, a supporting part, a clamping mechanism and a plurality of pipeline profiling mechanisms, the supporting part, the clamping mechanism and the pipeline profiling mechanisms are installed on the table top, the clamping mechanism and the pipeline profiling mechanisms are arranged on the peripheral side of the supporting part in a surrounding mode, an operation space is formed on one side of the supporting part, and the operation space corresponds to the connecting side; in the height direction of the split charging table, the supporting part is used for supporting the bottom end of the main body part, the clamping mechanism is used for pressing the top end of the main body part, and the pipeline profiling mechanism is used for fixing a pipeline. According to the split charging table provided by the invention, interference between the pipeline and the clamping mechanism can be avoided, and the pipeline and the main body part can be conveniently assembled.

The invention relates to a method for jointly operating an electronic stability control system and an autonomous driving system in a vehicle, comprising the following steps: during operation of the vehicle, activating (S1) the autonomous driving system for an autonomous driving operation in the event that the electronic stability control system has been activated; the autonomous driving system sending (S2) information to the electronic stability control system regarding that the autonomous driving system has been activated; adapting (S3) preset parameters of the electronic stability control system upon receiving the information that the autonomous driving system has been activated; the electronic stability control system sends (S4) information about the intervention made by the electronic stability control system to the autonomous driving system.

The application discloses a vehicle control method and a vehicle. The method comprises the following steps: determining whether an interface of a vehicle control unit of the vehicle is available based on a first preset condition; determining whether an interface of an electronic stability control system of the vehicle is available based on a second preset condition; in response to the interface of the vehicle control unit being available and the interface of the electronic stability control system being available, sending an automatic parking function enable to the vehicle control unit and the electronic stability control system based on a third preset condition; and controlling the vehicle based on the automatic parking function enable. The application solves the technical problem of low efficiency of vehicle automatic parking in the related art.

Disclosed are an apparatus and a method for controlling residual pressure in an electronic stability control (ESC)-integrated braking system. The apparatus for controlling residual pressure in an ESC-integrated braking system of the present disclosure includes: a master cylinder configured to generate braking hydraulic pressure through a master piston; hydraulic regulating valves configured to regulate hydraulic pressure, wherein the hydraulic regulating valves are provided in a hydraulic flow path connecting between a reserve and wheel cylinders configured to perform braking of each wheel; and a processor configured to: adjust a position of the master piston of the master cylinder depending on whether the master cylinder satisfies a preset residual pressure control initiation condition; and control the hydraulic regulating valves based on a required pressure and a circuit pressure of the master cylinder.

Disclosed are a system and method of controlling braking of a vehicle by adjusting an amount of braking of an inner wheel during a turn of the vehicle to prevent a slip and secure a driving force of an outer wheel. The method includes the steps of receiving, by an electronic stability control (ESC) device, a function activation request; determining, by the ESC device in response to the function activation request, whether an execution condition for braking control of the inner wheel for the turn of the vehicle is satisfied, and when the execution condition is satisfied, controlling a brake pressure by determining and adjusting a brake pressure control amount of the inner wheel during the turn of the vehicle based on a pre-set coefficient.

The embodiment of the invention provides a hydraulic braking system leakage detection method and device, relates to the technical field of vehicle braking, and is suitable for an electronic stability control system. The electronic stability control system collects real-time operation data of the electromagnetic valve and real-time operation data of the motor pump; brake fluid consumption is obtained, wherein the brake fluid consumption is the real-time brake fluid amount in a hydraulic pipeline of the hydraulic brake system; the real-time operation data of the electric cylinder and the consumption amount of the brake fluid are compared with a preset detection condition, a detection result is obtained, the preset detection condition is used for representing the amount of the brake fluid in the hydraulic pipeline when the electric cylinder operates under the normal operation condition of the hydraulic brake system, and the detection result is used for representing whether leakage occurs or not. According to the method, the complexity and the manufacturing cost of the hydraulic brake system can be reduced, the occupied space of the system can be reduced, brake fluid leakage detection can be conducted in real time, the brake safety function coverage rate is increased, the brake performance is improved, and safety is guaranteed.

The embodiment of the invention provides a battery pack falling system, method and device of a vehicle, a control unit and the vehicle. The system comprises an electronic stability control system ESC and a mechanical execution mechanism used for fixing the battery pack to a vehicle body. Wherein the pressure output end of a hydraulic pressure building unit in the ESC is connected with the mechanical executing mechanism through a liquid path switching valve; when the battery pack falling mechanism is triggered, the hydraulic pressure buildup unit is communicated with the pressure output end and the mechanical execution mechanism through the liquid path switching valve and provides hydraulic power for the mechanical execution mechanism; and the mechanical execution mechanism responds to hydraulic power and drives the battery pack to fall off. According to the system, a hydraulic power source is provided for falling of the battery pack by directly utilizing a hydraulic pressure buildup unit in an existing ESC in a vehicle, the battery pack is driven to be unlocked, and the effect of considering timeliness, reliability and economical efficiency of falling control of the battery pack is achieved.

Examples provide systems and methods for performing hydraulic braking in a vehicle. One system includes a set of hydraulically controlled brakes, a set of valves coupled to the set of brakes and configured to modulate hydraulic pressure applied to the brakes, a first hydraulic system including a primary hydraulic pressure generator, and a first controller, and a second hydraulic system including a backup hydraulic pressure generator and a second controller. The first controller is configured to receive sensor data. Based on the sensor data, the first controller determines an amount of hydraulic pressure to apply to each of the hydraulically controlled brakes, transmits a pressure command to the primary hydraulic pressure generator for generating hydraulic pressure, and transmits, using a high speed communication connection a valve control command to the second controller.

This application provides a method, apparatus, device, and medium for predicting the road surface adhesion coefficient for autonomous driving, comprising: acquiring the original time-domain signal generated by the contact between the tire and the road surface when the vehicle is driving; preprocessing the original time-domain signal and extracting a multi-dimensional time-domain feature vector; inputting the multi-dimensional time-domain feature vector into a trained road surface adhesion coefficient prediction model; processing the multi-dimensional time-domain feature vector using a probabilistic sparse self-attention mechanism; and outputting a prediction interval consisting of the lower and upper bound prediction values ​​of the road surface adhesion coefficient; encapsulating the prediction interval of the road surface adhesion coefficient according to a standard protocol and sending it to the autonomous driving application module through an in-vehicle network interface for dynamically calculating braking distance or triggering electronic stability control intervention. This solves the technical problems of poor anti-interference capability and single feature dimension in existing road surface adhesion coefficient prediction methods, and improves the accuracy of the road surface adhesion coefficient.