282 results about "Automobile design" patented technology

The invention relates to a fatigue life prediction system for a vehicle body structure of a vehicle in the technical field of vehicle design. The prediction system adopts a road spectrum fitting module to establish a combined road spectrum suitable for a field test; a vehicle body loading spectrum acquisition module is adopted to establish an entire vehicle multi-body rigid-flexible coupled model so as to extract the load-time-history at a connecting passage of the vehicle body and a chassis as the input of vehicle body excitation; an automobile body structure dynamic response analysis module is adopted to establish a finite element model of the vehicle body so as to obtain the static stress history generated by gravity and the dynamic stress history generated by road surface excitation of the vehicle body when the vehicle is under the excitation of the combined road spectrum; a dangerous position identifying module of low fatigue life of the vehicle body is adopted to quickly search dangerous positions of low fatigue life through an S-N method and a Miner linear accumulated damage model, and determine the multiaxial stress state of the dangerous positions by using 'biaxiality' analysis; and a fatigue life prediction module of the vehicle body structure is adopted to predict the fatigue lives of the dangerous positions accurately. The fatigue life prediction system for the vehicle body structure can improve the speed and the precision of the fatigue life prediction for the vehicle body structure so as to provide a reference for a real vehicle test.

A vehicle system structure vibration and noise transmission path detecting system belongs to the technical field of automobile design. In the invention, a vehicle system analysis model building module builds incentive related bus, vehicle structure and acoustic cavity models and sets up a vehicle system analysis model; a vibration or noise response spectrum acquiring module acquires the vehicle structure vibration or passenger indoor structure noise response analysis; a transfer path power calculating module calculates the transfer power of all transfer paths and the total power transferred to the vehicle; a main transfer path detecting module calculates and orders the contribution of all the transfer paths, and identifies the main transfer paths; an optimized design module identifies the main influential factors for transfer of the power flow of the main transfer paths, applies an optimized design method to improve relevant bus characteristic parameters and structure types, and verifies the parameters in the vehicle system or the vibration absorbing and noise reducing effect after structure improvement. The vehicle system structure vibration and noise transmission path detecting system can improve the accuracy of transfer path identification and possibility of effective control to the transfer paths.

The invention relates to an intelligent environment-friendly automobile structure which pertains to the technical fields of new energy and intelligent automobile design and comprises an automobile shell, wheels, facilities in a carriage, a vehicle sensing system, a power system, a transmission system, a brake system, a steering system and a vehicle control system; the vehicle sensing system is a system for sensing the external environment and vehicle attitudes, wherein, the system for sensing the external environment and the vehicle attitudes, the vehicle control system, the steering system, the brake system, the transmission system and the power system are respectively connected with a vehicle CAN bus; the automobile structure can greatly improve the response characteristics of the systems in operation and systematically increase the performance of the whole automobile, carry out the expected state recognition and trajectory planning of an automobile and further improve fuel economical property and emission performance under the operation of a driver. Due to the coordination and integrated control of all the systems, the whole automobile achieves the optimal systematical economical property, emission performance, safety and comfort.

The invention provides an automobile chassis part weight reduction method based on multi-body dynamics and a topological optimization technology for the purpose of solving the problems that in existing automobile designs, a clear and feasible weight reduction method is unavailable, and an automobile chassis part still has a large weight reduction space. The automobile chassis part weight reduction method comprises the following steps: step 1, a finished automobile multi-body dynamic model and an object part finite element model of an object automobile type for weight reduction are established; step 2, multiple typical working conditions are selected, and an equivalent static load borne by an object part under each typical working condition is extracted; step 3, the equivalent static loads extracted in the step 2 are used as optimization boundary conditions, a flexibility weighting coefficient of each typical working condition is selected, the minimum total weighting flexibility serves as an objective function, and topological optimization is conducted with a constraint function including modality and stress; step 4, a threshold value is selected for a topological optimization result, and the position of a material to be removed is guided. The automobile chassis part weight reduction method based on the multi-body dynamics and the topological optimization technology combines a fatigue strength design with a static strength design, thereby having high reliability, portability and operability and being capable of effectively shortening the development cycle.

The invention discloses a road load test method and system. The method comprises the steps of: with a sample vehicle running on roads on a test site, extracting an original road load spectrum; filtering the original road load spectrum, and obtaining the road load spectrum which has been filtered; based on a multi-body dynamics automobile model and in accordance with road load spectrum which has been filtered, obtaining the road load spectrum for carrying out the simulation through virtual iteration technology; through load decomposition, obtaining load data at each preset connection point of the vehicle body and a chassis; and based on the load data, calculating a first fatigue endurance value of each preset connection point. The method can obtain the actual original road load spectrum on different test sites, and based on the actual original road load spectrum, can calculate the fatigue life value, and can further predict a more accurate fatigue life of the vehicle, which can effectively increase the fatigue endurance of the vehicle body and provide the effective basis for the optimization and improvement of a vehicle structure in vehicle design.

The invention relates to an intelligent all-wheel electric driving automobile structure, belongs to the design technical field of pure electric automobiles and intelligent automobiles and comprises a sensing system of the external environment and vehicle attitudes, a dynamic system, a transmission system, a braking system, a steering system and a vehicle control system as well as an automobile shell, wheels and facilities inside the automobile carriage; wherein, the sensing system of the external environment and vehicle attitudes exchanges information with the vehicle control system through a CAN bus in real time; the vehicle control system comprises a part controller and a whole vehicle controller and the dynamic system comprises four driving motors and a power battery; the transmission system transfers the power to the wheels to drive the wheels to move; the braking system and the four motors make blend brake of vehicles according to instructions of the vehicle control system. The structure can realize the advantages in aspects such as the economy and emission of the pure electric automobiles and the active safety, comfortableness and performance of drivers of traditional intelligent automobiles simultaneously.

The invention relates to development of a novel test bed for a leaf spring for an automobile suspension. The test bed is characterized in that the test bed can accurately simulate suspension leaf spring stiffness performance and perform fatigue life tests. The test bed can accurately extract a mounting hard spot of the leaf spring and accurately simulate an actual automobile mounting environment, the leaf spring is mounted through front and back lug supports, stress and jump of the leaf spring during loading completely conform to the actual automobile state, so that the actual stress of the leaf spring is simulated accurately, and the accuracy of the leaf spring bed tests is improved. The novel bed can quickly and accurately extract leaf spring performance data and perform fatigue tests at the automobile design stage and precisely simulate the motion track and stress of the leaf spring in an actual working condition; the test equipment is applicable to various leaf springs, integrates a static stiffness test and a fatigue test of the leaf spring, accurately reflects the problem about design of state leaf springs and can assist an automobile enterprise in discovering problems at the design stage to a great extent, the product quality is improved, the whole automobile development period is shortened, and the cost and risks are reduced.

The invention mainly relates to a multi-body dynamics-based automotive suspension, a simulation test and design platform of vibration reduction system, and an analysis method of the multi-body dynamics-based automotive suspension. The analysis method comprises the following steps of: firstly, selecting a three-dimensional parametric model of the automotive suspension or an entire car from a three-dimensional parametric standard model base through an ADMAS/View software interface; secondly, selecting road files of appropriate tire files from a tire file library and a road file library; thirdly, modifying design parameters; fourthly, selecting a simulation test condition, performing a simulation analysis and outputting a simulation analysis result; and finally, determining an optimum design object by using the analysis result, and performing optimum design on design variables. The invention has the following advantages: firstly, a computer technique, a multi-body dynamics theory and an automotive test standard are comprehensively utilized to realize simulation analysis of automobile performance under a virtual environment; secondly, a parameterized modeling technique is utilized to realize model reuse of the simulation analysis of an automobile; and finally, an optimum design theory is utilized to realize the optimum design of the design parameters of the automobile. The multi-body dynamics-based automotive suspension, the simulation test and design platform of the vibration reduction system, and the analysis method are favorable for improving the automobile design efficiency and quality, and quickly respond to quickly changing international and domestic markets.

The invention aims to provide a method for preventing motor rotation blockage of an automotive electric trunk and a position sensor used thereby so as to avoid the rotation blockage of a motor, guarantee the safe use of the electric trunk and meet requirements on humanized automobile design. In the method for preventing the motor rotation blockage of the automotive electric trunk of the invention, an opening and closing device of the electric trunk consists of a control unit, a sensor and a transmission mechanism, wherein the transmission mechanism comprises the motor and a hinge; the sensor comprises the position sensor for detecting the position of an electronic trunk lid and a current sensor for detecting the current volume of the motor; and the control unit judges whether the movement of the electronic trunk lid is obstructed by a barrier according to signals of the position sensor and the current sensor, so that the rising, descending or stop actions of the electronic trunk are controlled, the motor rotation blockage of the automotive electric trunk is effectively prevented, and barrier detection and anti-clamping of the electric trunk are realized. Thus, the safe use of the electric trunk is guaranteed and the requirements on the humanized automobile design are met.

The invention relates to the field of automobile designs and in particular relates to a structural NVH (Noise Vibration and Harshness) analysis method for vibration interference abnormal noise based on modal frequency response. The method comprises the following steps: establishing a finite element model of a turning mechanism by virtue of a three-dimensional model, analyzing by adopting CAE software, combining the dynamic clearance deformation condition when two structural members are connected by virtue of a rubber bushing, thereby obtaining dynamic displacement values in three directions (X, Y, Z) of reference points of an axle tube and an axle lever; comparing the displacement values and the corresponding frequencies of the two reference points, calculating the clearance between the axle tube and the axle lever during movement, comparing the geometric layout size calculated clearance and the analyzed clearance, and further performing structural modification. According to the method disclosed by the invention, the development cycle of the product is shortened, the research and development cost is reduced, the response time is short and accurate, and motion interference abnormal noise and other engineering problems in the structural vibration are solved, so that the NVH performance of the complete vehicle is improved, and the method has important guiding significances for performing dynamic verification design on the complete vehicle and other system assemblies and on research and development of the complete vehicle.

The invention discloses a torque distribution control method for a four-wheel drive electric automobile and relates to an electric automobile control method. The method aims at solving the problem that energy efficiency of existing four-wheel drive system control methods still needs to be improved. The method comprises the steps that firstly, the operation condition of the automobile is detected in real time through a signal detection and conditioning unit and sent to a controller unit; when the SOC of a power battery is smaller than the allowed operation lower limit of the electric automobile, the controller unit sends a stop command, and operation of the electric automobile stops; or otherwise, the real-time total torque of three driving motors in the electric automobile operating process is calculated, a search algorithm is adopted for real-time calculating of the optimum distribution coefficient of torque of front wheels and a rear shaft generated when total efficiency of the three driving motors of the electric automobile is the optimum, the real-time total torque of the three driving motors is allocated to the two front wheels and the rear shaft, and the torque of the front wheels is equally allocated to the left front wheel driving motor and the right front wheel driving motor. The torque distribution control method is applicable to the field of automobile design and manufacturing.

The invention aims at providing an automobile engine mounting bracket and a manufacture method thereof. The automobile engine mounting bracket comprises a base, a support plate, a bracket, an installing hole and a suspending hole, wherein a bending part is arranged on the support plate. According to the automobile engine mounting bracket, the special bending part is adopted, and thus parts structures in an automobile can be avoided, larger operation space is provided for automobile design, especially for a compact automobile, a better design flexibility is achieved; and meanwhile, the shape and the structure ensure enough support strength, and thus the stability of an automobile engine mounting assembly is ensured. The invention also provides a manufacture method of the mounting bracket. By using a specially designed discharging block, the stability in a machining process is ensured; and due to the arrangement of a locating hole and a locating edge, a corresponding locating module is arranged on a matched forming mould, the machining precision can be well ensured, and excessive thinning and cracking on the thickness of parts materials during machining are avoided, and better practicability is achieved.

The invention provides a knowledge-driven automobile design method, which comprises the following steps of: 1, design input; 2, shape design; 3, submodule engineering design; 4, automobile virtual assembly; 5, whole automobile virtual verification; and 6, design result submission. Compared with the prior art, the automobile design method has the advantages of intelligently collecting the latest standards, regulations, reference vehicle types and the like, saving time and labor, having higher efficiency, difficultly generating careless omission, avoiding lag in technology and also accumulating design experience for recycling.

The invention discloses an intelligent network automobile information security risk automatic evaluation method and system. The method comprises steps of sequentially carrying out the risk evaluationaccording to steps, asset recognition, threat analysis, vulnerability analysis and attack path analysis after an evaluation object is selected; after preliminary risk assessment, a threat severity andinfluence severity analysis report being generated, the threat severity of an assessment object being subjected to grade assessment, and the influence caused by the threat severity being assessed; then, risk disposal and mitigation measures being implemented, and threats and influences brought by the threats of the evaluation object being reduced; and finally, generating a risk assessment report.The method is advantaged in that the range of the method covers automobile information safety management, including automobile information safety comprehensive management, product development periodinformation safety management and information safety management after product mass production, and information safety risk assessment automation of software and hardware related to network communication (including an automobile internal network) of an intelligent networked automobile in the automobile design, research, development and manufacturing process is achieved; and efficiency is improved.

The invention discloses an automobile semi-physical simulation experimental system combining a controller area network (CAN) bus and an electronic control unit, and belongs to the technical field of automobile design and development. The automobile semi-physical simulation system mainly comprises two parts: an entity part and a virtual simulation part, wherein the entity part is connected with the CAN bus through all systems including wheels, a frame, a power system and sensors of all control systems on an automobile chassis; the CAN bus is connected with the virtual simulation part through the electronic control unit; the virtual simulation part comprises a road view and a mathematical model; physical hardware is embedded into the simulation system; a software and hardware technique and an electronic technique are combined together; a computer is used for establishing a virtual model for reflecting an objective law; the virtual model is used for performing experiments; and certain acquired key signals are sent out by real hardware. The automobile semi-physical simulation system saves the cost compared with pure hardware, and has higher reliability compared with pure software.

The invention discloses a new energy finished automobile heterogeneous network emulator and a control method thereof. The emulator comprises a multi-core single-chip microcomputer, an ECU power output drive circuit, an ECU signal conditioning input circuit, an ECU standard input/output interface GPIO, CAN interfaces, LIN interfaces, SPIs, an Ethernet interface and a USB interface. A subsystem control model and a high-level protocol library are integrated in a MATLAB/Simulink model, a simulator model is established corresponding to a controller, operation is realized in real time, codes are automatically generated, and compiled and downloaded to the multi-core single-chip microcomputer, and semi-physical simulation of the finished automobile system is completed. In the heterogeneous network emulator, operation of electrical subsystems in different bus networks is simulated in real time, coordinated operation of different external control subsystems is detected on the basis of multi-core real-time concurrent operation, real-time fault simulation is realized, parallel operation of the KWP2000 and J1939 communication protocols is detected, and the fault diagnosis function of the vehicle mounted network is realized. Thus, a function and performance test platform is provided for the finished automobile product in the new-energy automobile design and development stages.

The invention discloses a method for optimizing automobile sliding door opening and closing force based on a test bed. According to the method, through the multifunctional sliding door test bed, according to the movement characteristics of a sliding door, a sliding door travelling wheel arm and guide rails are in contact at reasonable stress positions, the sliding door opening and closing force is optimized in the earlier stage of product research, and the door opening and closing force values are reduced to the greatest extent; during design, a certain angle relationship exists among the upper guide rail, the middle guide rail and the lower guide rail of the sliding door, due to manufacturing errors, the upper guide rail, the middle guide rail and the lower guide rail deviate from design values, and as a result, the opening and closing force becomes larger when the sliding door is opened and closed. By adjusting the test bed, the sliding door moves smoothly when being opened and closed, the door opening and closing force is reduced to the greatest extent so that the quality of the sliding door can be improved. Meanwhile, experimental verification of theories is conducted in the earlier stage of automobile design and development, the manufacturing cost of a body in white is reduced, a research method is provided for research and development of similar products, and research and development reference standards are provided.

The invention belongs to the technical field of automobile electronic equipment, particularly relates to an automobile electric performance testing method and system, and solves the problem that existing automobile circuit detection is not comprehensive enough and the like. The automobile electric performance testing method comprises the following steps: A, whole automobile electric device staticcurrent test; B, whole automobile load test; C, whole automobile voltage reduction test; and D, whole automobile wire overload short-circuit test. The automobile electric performance testing method and system have the advantages that whole automobile electrical loop protection conditions and grounding performance are tested and verified in an emphasized manner, concealed shortcomings in power distribution, grounding distribution, loop protection and the like in whole automobile design are analyzed according to test data, electrical performance of a whole automobile is optimized and improved, the performance and reliability of the electrical system of the whole automobile are improved to avoid the concealed shortcomings according to the concealed electrical performance shortcomings in the whole automobile design, thus, unreasonable circumstances such as too thick selected wires and excessive protection design are avoided, and lightweight and economical and reasonable design are achieved.

The present invention provides a motor stator, comprising: a stator body; a stator shell, which surrounds and sleeves the stator body along the outer contour of the stator body; a first end cover and a second end cover, which are respectively located on the stator body The ends on both sides of the casing in the axial direction; the cooling channels for the stator are distributed in the stator casing, the first end cover and the second end cover; the fasteners are used to fasten the stator casing and the two end covers to A sealing structure for the cooling channel is formed. The present invention designs a brand-new stator structure with a cooling flow channel, so that the extrusion process with a relatively simple manufacturing process can be applied, thereby increasing the yield and reducing the manufacturing cost.

The invention discloses a design method of an automobile control arm, which belongs to the technical field of automobile design. The method comprises the steps of obtaining key stressed working conditions according to the road spectra load in a control arm position of benchmarking vehicle or platform vehicle of a developed vehicle type and dynamics simulation analysis of the developed vehicle type, establishing a finite element grid envelopment model of the control arm of the developed vehicle type, performing topological optimization on the finite element grid envelopment model according to the key stressed working conditions and preset performance requirement, obtaining a control arm material distribution drawing according to topological optimization results, performing conceptual design according to the control arm material distribution drawing, so as to obtain a control arm geometrical model, obtaining a finite element model meeting design requirements according to the control arm geometrical model, and performing structure design according to the finite element model meeting the design requirements so as to obtain final design. The automobile control arm meeting the design requirements is obtained through CAE simulation, the development cycle of the control arm is effectively shortened, and the research and development cost is reduced.

The invention relates to an intelligent automobile network which is the key to solve the problems of the hollowing automobile design and the hollowing automobile electronic technology; a bus connects a control unit, a sensor, an intelligent instrument and the like in an automobile to form an internal network of the automobile; and the adoption of the automobile network makes the use of an electronic unit on the automobile break through the original limit that not too many electronic units can be added, so that a large number of electronic units are applied on the automobile, the electronic degree of the automobile is quickly improved, and the intelligent degree of the automobile is also improved.

The invention discloses an energy efficiency optimization method for a self-adaptive genetic double-electric-coupling fuel cell vehicle, and aims to solve the problem that an existing control method of a double-electric-coupling system does not enable the energy efficiency of a vehicle to play to the best. The double-electric-coupling power system is characterized in that a hydrogen fuel cell generator set and a lithium ion battery pack are mainly used for jointly providing driving electric energy for the vehicle; and according to the operation condition of the vehicle, the magnitude of the discharge power of a fuel cell and the magnitude of the discharge power of a lithium ion battery are optimized in real time, the discharge power of the fuel cell is P<fc>, the discharge power of the lithium ion battery is P<L>, then the two power parameters are used as optimization design variables, a self-adaptive genetic algorithm is adopted to optimize the power magnitudes of the two parameters,the power output scheme with the highest total efficiency is finally obtained, and necessary technical support is provided for energy efficiency optimization control of the dual-electric-coupling fuelcell electric vehicle. The method is applicable to the field of vehicle design and manufacturing.