374 results about "Vehicle engineering" patented technology

The invention discloses an intelligent cabin control method and related equipment, relates to the field of vehicle engineering, and mainly aims to solve the problem that an intelligent cabin of a current vehicle still depends on manual control too much. The method comprises the steps that multi-source sensing data of a vehicle are acquired, and the multi-source sensing data comprise driver information, passenger labels and event types; based on the multi-source perception data, calling a decision model to carry out branch processing so as to output audio configuration parameters, the audio configuration parameters including a volume level, an EQ parameter and a sound area switch; and packaging a control instruction based on the audio configuration parameter to control multimedia of the vehicle. The method is used for the intelligent cabin control process.

The method is mainly applied to the technical field of vehicle engineering. The invention discloses a combined driving assistance vehicle driving control method, system and device and a medium. The method comprises the steps that running state information of a vehicle and traffic state information of the position where the vehicle is located are obtained; generating a driving path for guiding the vehicle to pass through the traffic signal prompt area according to the traffic state information, and determining the speed of the vehicle when the vehicle runs on the driving path; inputting the running state information and the vehicle speed into a preset energy consumption characteristic model, and determining the energy consumption of the vehicle when the vehicle runs on the running path through the energy consumption characteristic model; and generating a control instruction set based on the driving path, the vehicle speed and the energy consumption, and controlling the vehicle to execute driving operation according to the control instruction set. According to the invention, through the combined decision and the driving assistance control operation, the driving intelligence is obviously improved.

This invention discloses a spoked wheel and a rail transit vehicle, relating to the field of vehicle engineering technology. The spoked wheel includes a rim, a hub, and multiple spokes; the hub is located at the center radially of the rim; all spokes constitute a spoke assembly, with the inner radial end of each spoke fixed to the outer circumferential surface of the hub and the outer radial end fixed to the inner circumferential surface of the rim; on the inner circumferential surface of the rim, the connection area of ​​the spoke assembly is located at the center axially, and annular mounting grooves are respectively provided on both sides of the connection area axially, in which noise-reducing damping rings are installed. Because the rim provides mounting space for noise-reducing damping rings axially on both sides of the connection area with the spoke assembly, noise-reducing damping rings can be installed to reduce noise, thereby improving the noise reduction capability of the spoked wheel.

The invention discloses a holographic road surface state modeling and cloud sharing method and system based on an intelligent tire group, is suitable for feedforward control of an intelligent chassis of a vehicle, and belongs to the technical field of vehicle engineering.The method comprises the steps that an original signal output by an intelligent tire sensor, a vehicle motion state signal and a positioning signal are collected; calculating the collected data through a vehicle-mounted edge calculation unit to obtain road surface elevation value information, and uploading the road surface elevation value information to a cloud end; the cloud server receives and processes the data uploaded by the vehicle end, constructs a holographic road surface, responds to a request of the vehicle end, and issues corresponding road surface information; and the vehicle end sends a road surface demand, receives a road surface elevation value information data sequence issued by the cloud end, and assists the vehicle to carry out dynamic feed-forward control. The method provided by the invention can accurately collect road surface state information, break a single vehicle data island, realize road surface state information sharing, and assist the vehicle to carry out intelligent chassis feed-forward control.

The method is mainly applied to the technical field of vehicle engineering. The invention discloses a virtual calibration method, device and equipment based on a driving simulator and a medium. A virtual test environment is constructed through a vehicle model of a target vehicle, a virtual test scene model and a chassis electric control system model. And executing driving operation and acquiring test data by utilizing human-computer interaction of the driving simulator, and further evaluating the vehicle performance. And when the performance parameters do not reach the preset indexes, optimizing the parameters of the chassis electric control system model according to the manual adjustment instruction until all the parameters reach the standard. And after reaching the standard, further adjusting the parameters by combining the subjective quantitative indexes of the driver, and determining the optimal performance parameters. The scheme is carried out in a virtual environment, so that the risk of real testing is avoided, and the safety is ensured; scenes and parameters can be quickly switched, and the calibration efficiency is improved; various working conditions can be simulated, and comprehensive evaluation is realized; lots of real vehicles and sites are not needed, and the cost is reduced.

The invention discloses an intelligent energy management control method, device and equipment for an electric tractor and a medium thereof, and relates to the technical field of electric drive control in agricultural machinery and vehicle engineering. Planning a global energy demand based on a predicted load; dynamically optimizing control and distribution in real time; executing and coordinating control; by constructing a dynamic closed-loop control framework integrating feedforward prediction and real-time feedback, energy management of the electric tractor can be passively responded in real time, and through multi-source information fusion and intelligent prediction, the prediction result is creatively used as feedforward input in a real-time control layer and is combined with current running state feedback, so that the real-time control of the electric tractor is realized. The control system can smooth instantaneous power impact caused by soil mutation and topographic relief, and the service life of a core power component is remarkably prolonged; in addition, through the combination of pre-matching and dynamic fine adjustment, the operation endurance mileage of the whole vehicle and the economy of the whole life cycle are improved.

The invention discloses an electric forklift gantry synchronous inclination system and an inclination system control method, and relates to the technical field of vehicle engineering and electrical control, and the method comprises the following steps: establishing a time-frequency phase-locked observation baseline, and calibrating an abnormal trigger window by collecting a pressure wave change track of the gantry synchronous inclination system under a reverse pressure bearing condition; generating a pressure wave characteristic fingerprint and a time delay matrix as dynamic references for resonance path identification; and according to the pressure wave characteristic fingerprints and the time delay matrix, inverting a hydraulic pipeline reflection topology, identifying a pressure energy concentration area, extracting a resonance source anchor point, constructing a wave energy distribution diagram, and forming a space positioning basis of the standing wave risk. According to the method, hydraulic standing wave risk modeling and boundary extraction are achieved through time-frequency observation and resonance path recognition, a standing wave damping structure is constructed in combination with the phase conjugate test and track shaping technology, steady-state damping and high-precision synchronous inclination control of the portal under reverse pressure bearing are achieved, and the system stability and operation safety are improved.

The invention discloses a trailer boundary dimension detection method based on unmanned container truck perception, and belongs to the technical field of automatic driving and vehicle engineering. In order to solve the problems of low manual correction efficiency and poor flexibility of external measurement equipment in the prior art, the invention provides the following scheme: acquiring three-dimensional point cloud information containing a vehicle through a vehicle-mounted laser radar, calculating a trailer rotation angle in real time by combining a high reflection intensity identifier, dynamically delimiting an interest region by using vehicle-mounted parameters, and filtering out a tractor point cloud; the remaining point clouds are distributed to a two-dimensional grid map, and candidate trailer point clouds are extracted through ground point cloud filtering and grid clustering analysis; finally, the maximum left width, the maximum right width, the maximum length and the maximum height of the trailer are calculated based on segmented time sequence checking, and the accurate boundary size is output. According to the method, manual intervention or external equipment support is not needed, real-time detection can be achieved under any trailer posture, and the safety and efficiency of unmanned container truck operation are effectively improved.

The invention relates to the technical field of vehicle engineering, and particularly discloses a load distribution optimization method and system for stake skeleton design, and the method comprises the steps: firstly building an initial three-dimensional design domain of a stake skeleton, and applying a composite dynamic load working condition obtained based on multi-body dynamics simulation; then, a material density distribution cloud picture is obtained through macroscopic topological optimization, a main force transmission path is recognized and extracted according to the cloud picture, and a design domain is divided into a core bearing area, a transition area and a non-key area; dot matrix structures with gradient material attributes are designed in the non-key area and the transition area according to stress states, and continuous changes of the material attributes are achieved by adjusting dot matrix types, arrangement directions and control parameters; and finally, carrying out performance verification and parameter iterative optimization on the overall structure comprising the core bearing area and the dot matrix filling area.

The invention relates to the technical field of vehicle engineering, and discloses a vehicle-mounted magneto-rheological active suspension damping matching control system which comprises a sensing module, a central control module, a magneto-rheological execution module and a power supply module. The signal output end of the central control module is electrically connected with the signal input end of the magneto-rheological execution module, and the power supply module is electrically connected with the sensing module, the central control module and the magneto-rheological execution module and provides working electric energy. All-dimensional parameters such as road surface states, vehicle body postures and vehicle operation are collected through the multi-source sensing module, signal interference and measurement errors are eliminated through weighted fusion processing of the central control module, and accurate decision of damping adjustment is achieved in combination with a pre-stored damping matching strategy library and a self-adaptive learning algorithm. And in cooperation with the stepless regulation characteristic of the magneto-rheological execution module, the driving state change can be followed in real time to dynamically optimize the damping force.

The invention belongs to the technical field of rail vehicle engineering, and discloses a simulation calculation method for accurately calculating train dynamic curve passing, which comprises the following steps of: establishing a longitudinal-transverse-vertical interaction heavy haul train-rail three-dimensional coupling dynamics refined model; nonlinear links (such as axle box suspension nonlinearity, center plate contact nonlinearity, wedge friction nonlinearity, coupler gap impact effect and dry friction nonlinearity, buffer nonlinear hysteresis impedance and the like) of locomotive suspension and the multi-parameter continuous change characteristic of a curve track are fully considered. If the coupler is used as an independent rigid part for modeling, analyzing the actual coupling and vibration characteristics of the coupler; in combination with the gas flow theory, an air braking model is further improved, and the influence of a train marshalling form on braking wave distribution and braking wave transmission, the influence of distribution of braking force and brake shoe pressure in the braking process on the vehicle wheel-rail power effect and the like can be considered.

The utility model discloses a converter system, and relates to the technical field of vehicle engineering. The converter system comprises a converter body formed by cascading a plurality of same basic power subunits, the input end of the converter body is used for being directly connected with a single-phase traction network, and the output end of the converter body is used for independently driving a plurality of traction motors. The output end of the converter body is provided with a three-phase output filter capacitor. According to the converter system, the basic power subunits are cascaded to form the converter main body, so that the current-carrying capability and the voltage endurance capability can be improved; and the output end of the converter main body is provided with a three-phase output filter capacitor, so that when the transformer main body outputs voltage to drive the traction motor, the torque ripple and electromagnetic noise of the traction motor can be reduced.

The invention provides a vehicle braking torque calibration method based on EMB, and relates to the technical field of vehicle engineering. Motor rotation angle-braking torque curves under different constant experiment currents are obtained in a laboratory, and a basic torque lookup table is constructed; a driving correction coefficient is generated in combination with slip rate deviation calculated in real time in the vehicle driving process, meanwhile, brake torque correction amounts of VDC, ABS and TCS systems for wheels and a whole vehicle target brake torque are integrated to generate an internal correction coefficient, finally, a dynamic correction coefficient is formed through fusion, basic current is corrected in real time, and the braking torque correction amount of the whole vehicle is calculated in real time. Therefore, accurate and self-adaptive calibration of the braking torque of each wheel is realized, and the braking safety and stability of the vehicle under complex working conditions are effectively improved.

The utility model discloses a braking system and a vehicle with the same, and relates to the field of vehicle engineering. The braking system comprises a valve body, the valve body is provided with an oil passing channel, one end of the oil passing channel is an assembling opening, and the inner circumferential face of the oil passing channel comprises a step face facing the assembling opening; the liquid storage tank is provided with an oil outlet connector, and the oil outlet connector is located in the assembly opening; the filtering piece is located in the oil passing channel and arranged between the step face and the oil outlet connector, the filtering piece comprises a retaining ring, the retaining ring is annular, and the outer circumferential face of the retaining ring makes contact with the inner circumferential face of the oil passing channel for sealing; the filter screen is arranged on the retaining ring; the first supporting column is connected to the side, facing the assembling opening, of the retaining ring so as to abut against the oil outlet connector in the shaking process. The brake system is high in filtering reliability, and the service life of the brake system can be guaranteed.

This application provides a method, system, equipment, and medium for evaluating the first-order ride comfort of a vehicle, belonging to the field of vehicle engineering and testing technology. The evaluation method includes: acquiring gyroscope signals and triaxial vibration acceleration signals at each measuring point of the vehicle at at least two vehicle speeds on various test roads, including at least long-wave impact surfaces and short-wave disturbance surfaces; processing the gyroscope signals to obtain attitude evaluation parameters characterizing the amplitude of the vehicle's first-order motion; performing frequency domain analysis on the triaxial vibration acceleration signals to obtain vibration evaluation parameters characterizing the abruptness of the vehicle's first-order motion; and evaluating the first-order ride comfort of the vehicle based on the attitude evaluation parameters and vibration evaluation parameters to obtain the evaluation results. This application achieves the separation and quantification of the amplitude and texture of the vehicle's first-order rigid body motions such as pitch, roll, and vertical sway, providing comprehensive and accurate evaluation results that effectively support subjective evaluation and chassis tuning.

The invention relates to the technical field of vehicle engineering, and discloses an off-road command military vehicle light-weight rear support which comprises a main base used for being connected with a vehicle body; the mounting platform is used for bearing equipment; the space truss structure serves as a main force bearing frame, and the two ends of the space truss structure are connected with the main base and the mounting platform correspondingly; wherein the space truss structure is composed of rod pieces, and the rod pieces are distributed in a non-uniform arrangement mode. The non-uniform arrangement of the rods is generated based on a topological optimization algorithm. The topological optimization algorithm aims at achieving structural mass minimization under the constraint of the off-road load spectrum. In the space truss structure, connecting nodes are formed at the intersections of a plurality of rod pieces, and the connecting nodes and the rod pieces connected with the connecting nodes are manufactured through an integrated forming process. Through a topological optimization algorithm based on an actually measured off-road load spectrum, a bionic non-uniform space truss structure is driven to be generated, so that materials are only distributed on an efficient force transmission path, and redundant mass is eliminated from the source.

The utility model relates to the technical field of vehicle engineering, and provides an exhaust pipeline, an engine and a vehicle, and the exhaust pipeline comprises a front cylinder group and a rear cylinder group. Wherein connectors, used for being connected with an engine, of a first manifold A, a second manifold A and a third manifold A of the front cylinder set are arranged at equal intervals, a gathering pipe A comprises a first section A and a second section A, the first section A is connected with the other end of the first manifold A and the other end of the second manifold A, and the second section A is connected with the other end of the second manifold A and the other end of the third manifold A; the guide lines of the first manifold A, the second manifold A and the third manifold A are arc curves, the guide line of the first section A is tangent to the guide lines of the first manifold A and the second manifold A, the guide line of the second section A is tangent to the guide lines of the second manifold A and the third manifold A, and the first section A and the second section A are connected through an arc chamfer; the rear cylinder set and the front cylinder set are arranged in an image mode with the center plane of the supercharger as the plane. Exhaust energy loss can be reduced, so that the engine is efficient and energy-saving.

The application discloses a differential power switching mechanism, a differential and a vehicle, and belongs to the technical field of vehicle engineering. The differential power switching mechanism comprises a joint member, which is provided with a first joint part and a second joint part, and the joint member has a first working position, a second working position and a third working position arranged along a moving direction; a driving mechanism is in transmission connection with the joint member; wherein in the first working position, the first joint part is kept disengaged from the planet carrier, and the second joint part is kept disengaged from the half shaft gear; in the second working position, the first joint part is engaged with the planet carrier, and the second joint part is kept disengaged from the half shaft gear; and in the third working position, the first joint part is engaged with the planet carrier, and the second joint part is engaged with the half shaft gear. The differential power switching mechanism, the differential and the vehicle provided by the application can realize three functions of disconnection, differential and locking, and have simple structure and convenient control.

The embodiment of the invention provides a multi-voltage platform control method and device and related equipment, and relates to the technical field of vehicle engineering. The method comprises the following steps: when a high-voltage battery and a first DC / DC converter are in a normal state, controlling the first DC / DC converter to be in a working mode; based on a first preset voltage gradient, the voltage of a first low-voltage battery is boosted to a first preset working voltage, and the first low-voltage battery is used for supplying power to a first low-voltage electric appliance; when the high-voltage battery and the first DC / DC converter are in the normal state, judging the state of the second DC / DC converter; when the second DC / DC converter is in the normal state, controlling the second DC / DC converter to be in a working mode; and based on a second preset voltage gradient, the voltage of a second low-voltage battery is boosted to a second preset working voltage, and the voltage of the second low-voltage battery is used for supplying power to a second low-voltage electric appliance. According to the embodiment of the invention, the three voltage platforms can work simultaneously and independently.

The method is mainly applied to the technical field of vehicle engineering. The invention discloses a virtual scene generation method, system and device for vehicle stability development and a medium, and the method comprises the steps: building a systematic constraint condition of a multi-parameter coupling relation based on a preset multi-level function scene model, and determining a parameter coupling boundary of a key scene according to the systematic constraint condition; selecting a parameter combination in the parameter coupling boundary, and generating and covering all conventional scenes and dangerous scenes possibly causing instability according to the selected parameter combination; based on a preset safety standard or physical constraint, performing compliance screening on each conventional scene and each dangerous scene; and generating a comprehensive scene library for virtual calibration of the chassis electric control system according to the plurality of screened scenes. According to the invention, the efficiency and quality of virtual calibration of the chassis electric control system can be obviously improved.

The invention discloses a vehicle, a control method and device of the vehicle and a readable storage medium, and relates to the technical field of vehicle engineering. The vehicle comprises a main body; the anti-falling system is arranged at at least one end of the main body, and the anti-falling system is used for generating a collision signal under the condition that the anti-falling system is in contact with an obstacle; the power system is arranged on the main body; the braking system is arranged on the main body; the control system is arranged on the main body and is electrically connected with the anti-falling system, the power system and the braking system; wherein the control system is used for detecting gear information of the power system under the condition that a collision signal sent by the anti-falling system is received, controlling the power system to stop providing driving force under the condition that the gear information is a first gear, and controlling the braking system to brake the vehicle. According to the vehicle control method, when the vehicle is controlled to stop, it can be effectively avoided that when the vehicle reports the accelerator power supply voltage value to be lower than the lower limit value, the vehicle breaks down, an alarm is given, and the vehicle quits the automatic driving state.

The invention belongs to the technical field of vehicle engineering, and particularly relates to an amphibious wheel type chassis device and a using method thereof. An amphibious wheel type chassis device comprises a chassis, a center transmission mechanism and a water propelling mechanism are arranged on the chassis, and the center transmission mechanism is connected with a steering mechanism; according to the amphibious wheel type chassis device, efficient maneuvering on land and on water is achieved through the center transmission mechanism, the water propelling mechanism and the steering mechanism; the central transmission mechanism takes an engine, an ISG motor and a variation box as a core and is matched with a front transmission structure and a rear transmission structure, power is distributed to all axle wheels through a main transmission shaft, 8 * 8 full drive is achieved by means of two modes of fuel oil drive and pure electric drive, and trafficability and stability of complex road conditions are improved through a steering hydro-pneumatic suspension and a non-steering hydro-pneumatic suspension.

The invention belongs to the technical field of vehicle engineering, and discloses a device and method for eliminating surface wave defects of an automobile outer covering part, the device is a self-closing exhaust valve, the self-closing exhaust valve comprises a valve body, an embedded sleeve, an upper cover, an upper cover rotating shaft, an upper cover sealing ring and an upper cover counter weight, the valve body and the embedded sleeve are both hollow pipes with the upper portion and the lower portion open, and mounting threads are arranged on the outer surface of the valve body; the embedded sleeve is detachably arranged in the valve body in a sleeved mode, the upper cover is rotatably connected to the top of the valve body in a limited mode through an upper cover rotating shaft, a detachable upper cover sealing ring is arranged between the upper cover and the valve body, and the upper cover balance weight is arranged on the upper cover and is adjustable in weight. According to the method, the self-closing exhaust valve is additionally arranged on the exhaust hole of the flanging forming process die, and the wave defect generated on the surface of the automobile outer covering part is effectively eliminated by adopting a method of adjusting the installation air tightness of the self-closing exhaust valve, the free rotation state of an upper cover opening, an upper cover balance weight, an upper cover rotating shaft, the air tightness of the upper cover and the diameter of an air vent; the surface quality of the outer covering part is improved, and the stability of high-speed production is guaranteed.

This invention relates to the field of vehicle engineering technology, specifically to a method and system for dynamically calibrating motion sickness comfort thresholds for electric passenger vehicles. The method involves acquiring individual occupant information, including physiological parameters and motion sickness susceptibility parameters, and generating an individual feature dataset based on this information; collecting vehicle motion parameters; calculating a dynamic threshold by determining a baseline threshold based on the current driving conditions, calculating a comprehensive correction coefficient using a preset correction model combined with the individual feature dataset, and calculating the current occupant's dynamic motion sickness comfort threshold based on the baseline threshold and the comprehensive correction coefficient; comparing the vehicle motion parameters with the dynamic motion sickness comfort threshold, and outputting a warning signal or executing vehicle control operations when the real-time motion parameters exceed the dynamic motion sickness comfort threshold. This technical solution enables accurate, personalized, and multi-scenario adaptable motion sickness comfort threshold calibration.

The application discloses a high-strength integral type yuanbao beam, a vehicle frame assembly and a vehicle, and belongs to the technical field of vehicle engineering, wherein the yuanbao beam comprises two support bodies; and a connecting member, two ends of the connecting member are respectively welded to the two support bodies to form an integral structure. The application enhances the local support strength of the vehicle frame at the battery frame, effectively improves the structural mode of the region, and makes the region avoid the resonance frequency interval generated by tire operation and a power system, so that the problem of vehicle shaking caused by the rear battery load of a new energy heavy truck is fundamentally solved.

The application discloses a multi-module fusion vehicle state estimation model and a control method thereof, relates to the technical field of vehicle engineering and intelligent vehicle control, and comprises a tire force estimation module, a vehicle pose estimation module, an adhesion coefficient calculation module, a slip rate calculation module, a road surface friction coefficient identification module and a yaw angular acceleration calculation module; the tire force estimation module acquires four-wheel speeds, four-wheel driving torques, four-wheel braking torques, a vehicle speed, longitudinal acceleration, lateral acceleration, vertical acceleration, yaw angular velocity, pitch angular velocity and roll angular velocity, performs tire rotation dynamics calculation and axle load transfer calculation, and obtains longitudinal forces and vertical forces of each wheel. The application adopts a layered module architecture and multi-parameter fusion calculation, realizes accurate estimation of vehicle states, optimizes calculation logic and constraint mechanisms in different scenes through a working condition self-adaptive strategy, and improves overall estimation accuracy, system stability and engineering adaptation capability.

The present application relates to the technical field of vehicle engineering, and particularly relates to a filter, a power assembly and a vehicle. The filter provided by the present application comprises a shell, a first oil plug and a second oil plug. A first filter cavity and a second filter cavity for filtering are formed in the shell, the first filter cavity and the second filter cavity are communicated, the first filter cavity is provided with a first inlet and a first outlet, and the second filter cavity is provided with a second inlet. An inner wall of an oil cavity is provided with a first oil hole corresponding to the first inlet and a second oil hole corresponding to the second inlet. When the first oil plug blocks the first oil hole, the second oil plug blocks the second oil hole and the second inlet, and when the first oil plug blocks the second oil hole, the second oil plug blocks the first oil hole and the first inlet. By arranging the communicated first filter cavity and the second filter cavity in the filter, and arranging the first oil plug and the second oil plug to control the on-off circuit of the first filter cavity and the second filter cavity, the two filter elements can be used alternately, and the service life of the filter is prolonged.

The utility model relates to the field of vehicle engineering, proposes a kind of vehicle generator battery power supply system, including mounting seat, the upper surface of mounting seat is fixedly connected with integrated box, the front of integrated box and the back of integrated box are both provided with heat dissipation opening. The device generates electricity by generator body, can provide power for battery body, while voltage stabilizer starts to work, adjusts the output voltage of generator body, so that it is charged in certain range to battery, then using charging controller, the state of battery body is monitored in real time, and charging parameter is intelligently adjusted, can prevent generator output voltage too high or too low, the working temperature of battery body is monitored by temperature sensor when charging, when temperature rises to a certain degree, can automatically start drive seat to drive cooling fan to rotate, cooperate with heat-conducting paste layer, heat-conducting plate and radiating fin, accelerate the heat dissipation process, reduce system temperature, it is very practical.

The invention provides a back door assembly and a vehicle, and relates to the field of vehicle engineering.The back door assembly comprises a back door outer plate and a back door inner plate, and the back door inner plate is connected with the back door outer plate; the back door inner plate is provided with an upper area, a lower area and a boundary beam arranged around the back door inner plate. The section of the upper area protrudes towards the direction close to the back door outer plate; the cross section of the lower area protrudes in the direction away from the back door outer plate, and at least the cross section of the transversely-arranged edge beam is in a step shape. Thus, the section of the upper area protrudes towards the direction close to the back door outer plate, the width of a window frame opening can be shortened on the premise that the view field is guaranteed, and the rigidity of the area is guaranteed; the section of the lower area protrudes in the direction away from the back door outer plate, so that the distance between the back door inner plate and the back door outer plate is increased, and a large storage space is formed in the back door. Meanwhile, the cross section of at least the transversely-arranged edge beam is in a step shape, and the torsional rigidity and the collision impact resistance of the back door assembly are further improved.

The invention relates to the technical field of vehicle engineering and intelligent traffic, and discloses a road gradient calculating and grading method based on multi-source vehicle data, which comprises the following steps: introducing a vehicle model adaptation mechanism to carry out multi-source data acquisition and preprocessing to obtain multi-source key data; based on the multi-source key data, obtaining an original time sequence slope angle through gravity component extraction, scene adaptive double-model slope angle calculation and noise suppression multi-layer optimization based on slope continuity characteristics; performing continuous gradient validity verification on the original time sequence gradient angle to obtain a target time sequence gradient angle; based on the target time sequence slope angle, performing primary grading by adopting a slope grading system pre-constructed by combining the road type and the traffic risk; and correcting the initial grading based on a time sequence grading comparison strategy to obtain a final grading result. According to the method, multi-source data are fused, a physical model is constructed to achieve slope accurate calculation, a dynamic grading system is constructed based on the road engineering standard to achieve scientific grading, and the precision and practicability problems are solved from the principle level.