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600 results about "Vehicle engineering" patented technology
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Vehicle engineering is a sub discipline of mechanical engineering that encompasses the fields of automotive engineering, aerospace engineering, rolling stock and marine engineering.
Multi-objective optimization design method for wheel
ActiveCN107145663AImprove performanceAvoid defects where performance does not meet requirementsGeometric CADSustainable transportationTopology optimizationEngineering
The invention discloses a multi-objective optimization design method for a wheel, relates to the technical field of vehicle engineering and aims at solving the problems that the optimization space is limited and automatic optimization design is not carried out through joint transferring of calculation software with various properties due to the fact that only limited performance of the vehicle is analyzed and optimized and parametric modeling is lost at present. The method comprises the steps of topological optimization of a wheel fatigue test, combined topological optimization modeling, fatigue performance analysis, impact performance analysis, aerodynamic performance analysis and multi-objective optimization. Five working conditions of a dynamic bending fatigue test of the wheel, a dynamic radial fatigue test, an impact test of an impact hammer opposite to a spoke, an impact test of the impact hammer opposite to a window and air dynamics analysis of the wheel are set; the properties, such as the strength, the rigidity, the vibration characteristic, the fatigue life, the fatigue life security coefficient, the impact performance, the air dynamic property and the lightweight performance of the wheel are comprehensively considered; various performance parameters are calculated through finite element software emulation; and optimization design is carried out on the wheel by setting the performance parameters to be constraint conditions or objective functions.
Owner:JILIN UNIV
Test bench of comprehensive performance of air spring
InactiveCN103364161AReduce testing costsReflect the stressMachine part testingVibration testingDynamic stiffnessAir spring
The invention discloses a test bench of the comprehensive performance of an air spring, and belongs to the technical field of vehicle engineering. The test bench can effectively achieve the aims of carrying out the vertical, transverse and twisting tests of the air spring at the same time and simulating the actual working states of the air spring. A rack of the test bench is in a four stand column type, a bearing platform is arranged in the middle of the rack, a device for bearing balance weight is arranged above the rack, a sensor is arranged below the rack, each stand column of the rack is provided with a cone-shaped fixing nut, a vertical hydraulic actuator which is arranged in a plane triangle mode is arranged below a workbench, and the volume of an additional air chamber is adjustable. The influence to the dynamics performance of the air spring by regional environment with different temperatures can be simulated by an external air conditioner system, multi-dimensional simulation is applied to the air spring through a shock excitation source, changes of loads and deflection of the air spring under the conditions with different environment temperatures and physical parameters are measured, and parameters such as dynamic stiffness, static stiffness, damping ratio and transfer ratio of the air spring are calculated through parameters of vibration characteristics. The test bench is mainly used for testing the comprehensive performance of the air spring.
Owner:CRRC QINGDAO SIFANG CO LTD
Plug-in type integrated actuating electric generator hybrid power car driving system
InactiveCN101293478ALow powerSeries hybrids haveGas pressure propulsion mountingPlural diverse prime-mover propulsion mountingStarter generatorLow speed
The invention discloses a mixed power car drive system of a plugging type integrated starting generator in the technical field of vehicle engineering; wherein, an engine is coaxially connected with the integrated starting generator; the integrated starting generator is connected with the driving disc of an automatic clutch; the automatic clutch is connected with a planetary pearing by a drive motor; the planetary pearing is respectively connected with the drive motor and a main reducer-differential mechanism; the main reducer-differential mechanism is connected with a wheel by a drive axle; a power battery is respectively connected with a motor controller and an external power plug by cables; the motor controller is respectively connected with the integrated starting generator and the drive motor by cables; the outer gear ring of the planetary pearing is fixedly connected with a car frame; the invention maintains the traditional vehicle structure to the utmost extent and carries out optimization on the working points of the engine by a double-motor to lead the engine to run stably in an area with high efficiency and low discharge; the system of the invention is especially suitable for the operation of urban low speed bus working condition.
Owner:SHANGHAI JIAO TONG UNIV
Electric power-assisted braking system with composite functions
PendingCN105774788AShock suppressionSmall pressure fluctuationsBraking action transmissionFoot actuated initiationsElectric power systemLiquid storage tank
The invention relates to the field of vehicle engineering and discloses an electric power-assisted braking system with composite functions. The electric power-assisted braking system comprises a brake pedal displacement sensor, a brake pedal, a pedal travel simulator, an electric power-assisted assembly, a main cylinder, a wheel cylinder, a hydraulic control unit, a liquid storage tank, a motor, a deceleration and torque increment mechanism, an electronic control unit, a normally open electromagnetic valve, a normally closed electromagnetic valve and a vehicle-mounted other sensor. By designing the pedal travel simulator, decoupling of friction braking force and regenerated braking force can be achieved, and continuous variable crural feeling is provided; a motor assisting device, a brake anti-lock system and the hydraulic control unit can be integrated, and an active braking function is achieved; and no interference exits between motor input and driver input, active braking can be achieved through the motor, and the electric power-assisted braking system can serve as a brake actuating mechanism of intelligent automobiles and unmanned automobiles.
Owner:JILIN UNIV
Trailer traction and connection device
The invention relates to the field of vehicle engineering equipment, in particular to a trailer traction and connection device. The trailer traction and connection device is composed of a trailer head connector, a traction rod joint, a tension regulator, a traction rod, a buffer spring, a trailer connector, a joint pin shaft, a tension rod bolt and a traction rod bolt. Pin shaft holes in the trailer head connector and side-plate pin holes in the traction rod joint are fittingly mounted and hinged through the joint pin shaft; bolt holes in the traction rod joint are hinged to bolt holes in the tension regulator the tension rod bolt; a joint of a traction rod is mounted in a duckbilled structure of the traction rod joint; the buffer spring is sleeved on a shaft rod of the traction rod; a rod head of the traction rod is fittingly mounted with a traction-rod mounting shaft barrel of the trailer connector and locked through a nut. The trailer traction and connection device has the advantages that safety of the traction rod in the process of operation is effectively guaranteed, and loss caused by breakage of the traction rod is avoided, so that production efficiency is improved.
Owner:WUZHONG LONGHUI LOGISTICS
Horizontal pumping system and pumping control method for automobile wind tunnel
InactiveCN1808089AEffective simulationEfficiently model uniform simulationsAerodynamic testingDiffusionDifferential pressure
The invention relates to a system for pumping horizontally on wind tunnel of vehicles and a method for controlling pumping. The system comprises: wind tunnel spout, pumping spout seal, horizontal pumping slot, air flow pumping pipe, flow counter, differential pressure sensor, PLC controller and variable-frequency controller; under the wind tunnel spout being placed the pumping spout, on the front edge being connected with pumping spout seal, on the upper, lower ends of the front edge being connected with the differential pressure sensor; on one end of the flowing counter being connected with the pumping spout, the other end being connected with pumping machine which is connected with the variable-frequency controller; the variable-frequency controller, differential pressure sensor, and the flow counter are respectively connected with the PLC controller. The method comprises: making air flow for testing enter downstream diffusion stage of testing via the inventive device, in front of the testing vehicle forming wind speed profile, selecting different pumping spout seal, adjusting the opening of the pumping spout; calibrating the pressure differential vs. testing wind speed, flow vs. testing wind speed and rotary speed vs. testing wind speed three action control curve, comparing the real pumping flow with the real pressure differential of the upper, lower edges of pumping spout and the calibration curve data.
Owner:TONGJI UNIV
Wake-up method and device for vehicle-mounted telematics box and storage medium
ActiveCN108833122AImprove efficiencyIncrease success rateParticular environment based servicesSubstation remote connection/disconnectionNetwork packetComputer terminal
The invention discloses a wake-up method and device for a vehicle-mounted telematics box and a storage medium, and belongs to the technical field of vehicle engineering. The wake-up method is appliedto a TSP platform and comprises the steps that when a vehicle control request sent by a mobile terminal is received, a data packet related to a vehicle bound with the mobile terminal is acquired froma target base station, wherein the target base station is a base station capable of achieving PDP connection with the vehicle; and when the data packet comprises address information of a vehicle-mounted TBOX mounted in the vehicle, a wake-up instruction is sent to the vehicle-mounted TBOX on the basis of the address information to wake up the vehicle-mounted TBOX. According to the wake-up method,the address information of the vehicle-mounted TBOX can be acquired from the target base station, and then the wake-up instruction is sent to the vehicle-mounted TBOX according to the address information; and due to the fact that the wake-up instruction does not need to be sent to the vehicle-mounted TBOX through a short message channel, the phenomenon that sending is delayed or the instruction islost cannot be generated, therefore, the efficiency of remotely controlling the vehicle is improved, and the success rate of remotely controlling the vehicle is increased.
Owner:CHERY AUTOMOBILE CO LTD
Road gradient and car state parameter combined estimation method based on parameter estimation error
The invention relates to a road gradient and car state parameter combined estimation method based on a parameter estimation error, and belongs to the field of vehicle engineering. The method comprises the steps of firstly establishing a car driving longitudinal kinetic model according to a car kinetics theory and the newton second law; measuring a car speed and a driving force of an engine by virtue of a car-borne sensor, and adopting the measured car speed and the driving force as input quantities of an estimation algorithm; filtering the car driving longitudinal kinetic model, and extracting a parameter estimation error; judging whether an excitation condition is satisfied: estimating an unknown parameter vector by utilizing a vector designing self-adaptive law containing the parameter estimation error if the excitation condition is satisfied; adding random interference to the driving force if the excitation condition is not satisfied, and returning for re-measurement; finally calculating estimated values of a road gradient, car weight, viscous friction coefficient, rolling friction coefficient and air resistance coefficient by virtue of basic mathematical manipulation. By adopting the method, the cost is reduced, the accumulation of measurement noise can be avoided, and the precision is improved; the calculation quantity is reduced.
Owner:KUNMING UNIV OF SCI & TECH
Parking method, parking device and storage medium
The invention discLoses a parking method, a parking device and a storage medium and beLongs to the technicaL fieLd of vehicLe engineering. The method comprises acquiring an empty parking space that meets parking conditions when an automatic parking function is activated; pLanning a parking path of a target car according to current position of the target car and Location of the empty parking space;and parking the target car into the empty parking space according to the parking path. According to the invention, the target car is parked into the empty parking space according to the parking pathby obtaining the Location of empty parking space that meets the parking conditions and the current Location of the target car. Automatic parking is possibLe without cooperation of a driver's hands andfeet, which reduces the difficuLty of parking, simpLifies parking operation and improves parking efficiency and safety.
Owner:CHERY AUTOMOBILE CO LTD
Car ride protection method and device and computer readable storage medium
InactiveCN108394374AAvoid harmImprove securityPedestrian/occupant safety arrangementSimulationBody contour
The invention discloses a car ride protection method and device and a computer readable storage medium, and belongs to the field of vehicle engineering. The method comprises the steps that a compartment scene graph of a car is acquired, wherein the compartment scene graph is an image describing the compartment condition of the car; body contours of passengers taking the car are detected from the compartment scene graph; when a body contour matched with a preset child body contour exists in the body contours of the passengers taking the car, it is determined that a child takes the car, and theride state of the child taking the car is determined; when the ride state of the child is a dangerous state, the car is controlled to execute a preset vehicle-mounted function to complete the car rideprotection for the child. According to the car ride protection method and device and the computer readable storage medium, when it is determined through the compartment scene graph that a child takesthe car, the ride state of the child is determined, when the ride state of the child is the dangerous state, the car is controlled to execute the vehicle-mounted function to prevent the child from being injured during the car ride, thereby achieving the purpose of protecting the child.
Owner:CHERY AUTOMOBILE CO LTD
Method for generation of typical road spectrum
ActiveCN102222141AConducive to dynamic response testRich frequency componentsSpecial data processing applicationsRoad engineeringOctave
The invention discloses a method for generation of a typical road spectrum, belonging to the technical field of road engineering and vehicle engineering. The method comprises the following steps: collecting the spatial domain data of a road pavement section and to form a spatial domain curve of the road pavement section, and then converting the spatial domain curve into a road spectrum curve by means of Fourier transform; operating a multi-octave pass band to filter the road spectrum curve; repeating the procedures above for all test roads to obtain all flat road spectrum curves and drawing the curves in the 8-grade road grading map of a double-log coordinate; and calculating the average values of all spectrum values in each octave and connecting the average values to obtain an overall typical road spectrum curve. The method can be used to generally evaluate and reflect the road pavement quality and evenness as well as the power distribution under different spatial frequencies. In addition, the method can grade the roads and perfom regional researches, and particularly has obvious advantages when being used for comparing and researching regional road differences in different regions.
Owner:CHINA AUTOMOTIVE ENG RES INST
Method for correcting unmanned aerial vehicle control matrix based on wind tunnel test data and CFD calculation
ActiveCN106650095AHigh precisionGuaranteed accuracyGeometric CADSpecial data processing applicationsEngineeringParameter control
Provided is a method for correcting an unmanned aerial vehicle control matrix based on wind tunnel test data and CFD calculation. Due to the fact that flight control needs pneumatic control, the reliable control matrix is provided. The wind tunnel test data of a planar model with an unconventional pneumatic layout is extracted, the dynamic derivative of a design point is subjected to local correction, and the influence of the unconventional layout on a traditional layout empirical formula is effectively eliminated. Compared with an existing control matrix providing method, an original method refers to ab control matrix research researched through a traditional unmanned aerial vehicle engineering design method, is obtained mainly based on experience summarized through many years of conventional appearance pneumatic layout design, has limitation to the unconventional layout and is disconnected from a wind tunnel test link. The conventional force measurement data of a wind tunnel test of the planar model is utilized creatively, the control matrix is corrected, and a more precise control matrix is provided for PID parameter control.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS
Arc spiral line mixed herringbone gear without tool withdrawal groove and processing method thereof
InactiveCN104819266AHigh coincidenceMesh transmission smoothPortable liftingGear teethHybrid typeAgricultural engineering
The invention discloses an arc spiral line mixed herringbone gear without tool withdrawal groove. The gear comprises a herringbone gear body, a plurality of herringbone gear wheel teeth are formed on the herringbone gear body, herringbone tooth groove is formed among herringbone gear wheel teeth, and the herringbone gear wheel teeth is orderly composed of a herringbone gear right rotating wheel tooth, a herringbone gear arc wheel tooth and a herringbone gear left rotating wheel tooth section; two sides of the herringbone gear wheel tooth are the herringbone gear wheel tooth concave tooth surface and the herringbone gear wheel tooth convex tooth surface; a processing method for arc spiral line mixed herringbone gear without tool withdrawal groove is also disclosed, the herringbone gear is characterized of being big in contact ratio, stable in meshing transmission, low in noise, big in bearing capability and compact in structure; the arc spiral line mixed herringbone gear without tool withdrawal groove is suitable for occasions such as ship power, airline mechanical transmission, overloaded vehicle engineering high overloading with close restraint on structure size of gear case.
Owner:XIAN TECHNOLOGICAL UNIV
Motor coach hybrid power driving system
InactiveCN101327728ALow powerSeries hybrids haveGas pressure propulsion mountingPlural diverse prime-mover propulsion mountingStarter generatorLow speed
The present invention discloses a hybrid power drive system of motor coach, and belongs to the technological field of vehicle engineering; wherein, an engine is coaxially connected with an integrated starting generator; the integrated starting generator is connected with an automatic clutch driving disc; the automatic clutch is connected with a reducing mechanism through a driving motor; the reducing mechanism is respectively connected with the driving motor and a main reducer-differential; the main reducer-differential is connected with vehicle wheels through a driving bridge; a power battery is connected with a motor controller through a cable; and the motor controller is respectively connected with the integrated starting generator and the driving motor through a cable. The hybrid power drive system maintains the traditional vehicle structure to the greatest extent, and adopts two motors to optimize the working points of the engine, so that the engine can stably operate in the high-efficiency and low-emission regions, in particular in the operating conditions of low-speed city buses.
Owner:SHANGHAI JIAO TONG UNIV
Adjusting method and device of automobile seats and storage medium
The invention discloses an adjusting method and device of automobile seats and a storage medium, and belongs to the technical field of vehicle engineering. The adjusting method of the automobile seatscomprises the steps that physical parameters of passengers in an automobile are obtained; corresponding seat adjustment parameters are obtained according to the physical parameters of the passengers;and seats taken by the passengers in the automobile are adjusted according to the seat adjustment parameters. According to the adjusting method and device of the automobile seats and the storage medium, by obtaining the physical parameters of the passengers in the automobile and obtaining the seat adjustment parameters matched with the passengers according to the physical parameters, and thus theadjustments of the seats are carried out according to the seat adjustment parameters; and it is ensured that the seats after being adjusted meet the comfort of the passengers, the passengers do not need to carry out the adjustments manually, the complexity of adjusting the seats is reduced, and the automobile intelligence degree is improved.
Owner:CHERY AUTOMOBILE CO LTD
Mecanum electric wheel and omnibearing mobile platform
PendingCN106026504ASimple structureReduce in quantityMechanical energy handlingWheelsControl theoryVehicle engineering
The invention relates to the technical field of vehicle engineering, and provides a Mecanum electric wheel and an omnibearing mobile platform. The Mecanum electric wheel comprises a rotating mechanism and multiple Mecanum components. The rotating mechanism comprises a stator part and a rotor part which can coaxially rotate relative to the stator part. All the Mecanum components are equidistantly and circumferentially arranged outside the side wall of the rotor part in a surrounding way with the rotating shaft of the stator part acting as the center. All the Mecanum components are fixedly connected on the rotor part. According to the Mecanum electric wheel, the whole structure is simple and the conventional wheel hub structure is replaced by the rotating mechanism so that the number of parts of the whole electric wheel can be reduced, and the matching precision required for the stator part and the rotor part is low and thus the Mecanum electric wheel is more suitable for production and processing.
Owner:SHENZHEN INST OF ADVANCED TECH
Double-air-spring comprehensive performance test bench
The invention discloses a double-air-spring comprehensive performance test bench, belonging to the technical field of vehicle engineering. The dynamics problems of key components which are a height valve, a pressure valve and an anti-rolling torsion bar in an air spring in the process of vehicle running can be effectively simulated. The double-air-spring comprehensive performance test bench comprises a multi-direction actuator working table, an additional air chamber, an air inflation and exhaustion system and counterweights, and an upper end counterweight only limits longitudinal motion. Multi-dimensional and multiphase excitations are applied to double air springs, under the different temperature conditions, the load, deflection change, and vehicle lateral and vertical acceleration and displacements of the air springs under different physical parameter conditions are measured, the dynamical parameters of the air spring such as every direction dynamic rigidity, a damping ratio, a displacement transfer ratio and an acceleration transfer ratio are calculated according to vibration performance parameters, two-point control and four-point control are compared, thus an air spring dynamics performance test is completed, and the operation stability parameters of the vehicle is obtained. The double-air-spring comprehensive performance test bench is mainly used for a double-air-spring comprehensive performance test.
Owner:SOUTHWEST JIAOTONG UNIV
Fatigue driving reminding method and device, and storage medium
ActiveCN108961681AReduce the risk of traffic accidentsImprove driving safetyAlarmsTraffic accidentVehicle engineering
The invention discloses a fatigue driving reminding method and device, and a storage medium, and belongs to the technical field of vehicle engineering. The method includes: acquiring eye information and head information of a driver, and driving information of the driver driving a car; determining a driving state of the driver on the basis of the eye information, the head information, and the driving information of the driver; and using a vehicle-mounted playback device to perform fatigue driving reminding when the driver is in a fatigue driving state. The imethod determines the current driving state of the driver according to the eye information, the head information and the driving information of the driver, and performs fatigue driving reminding when the driver is in the fatigue drivingstate, thereby lowering the risk of traffic accidents due to fatigue driving of the driver and improving the safety of driving of the driver.
Owner:CHERY AUTOMOBILE CO LTD
Automobile glass light transmittance adjusting method and device and computer readable storage medium
Owner:CHERY AUTOMOBILE CO LTD
Acceleration control method of vehicle follow gallop sports
InactiveCN1719354AThere will be no speed shocks or even vehicle collisionsEasy to understandSpeed/accelaration controlAdaptive controlTraffic accidentEngineering
The present invention relates to an acceleration control method for car following movement in the field of vehicle engineering technology. Said method includes the following steps: (1). Setting traffic condition; (2). Selecting parameter value; (3) obtaining initial state of all the vehicles; and (4). Observing running state of vehicle queue when t is greater than O. said invention is mainly aimed at preventing traffic accident.
Owner:SHANGHAI JIAO TONG UNIV
Multistage multimode mechanical and hydraulic continuously variable transmission
InactiveCN107869563AMeet the needs of multi-working conditions such as long-distance transition operationsExtended shifting rangeFluid gearingsEngineeringControl theory
The invention relates to the field of vehicle engineering variable transmission equipment, in particular to a multistage multimode mechanical and hydraulic continuously variable transmission comprising a shell, a double planetary row mechanical transmission and a hydraulic transmission, and the double planetary row mechanical transmission and the hydraulic transmission are arranged in the shell ina parallel connection mode. A mode gear switching execution system is further arranged in the shell and is used for controlling independent variable output of the double planetary row mechanical transmission or for controlling independent variable output of the hydraulic transmission or for controlling mixed variable output of the double planetary row mechanical transmission and the hydraulic transmission. The multistage multimode mechanical and hydraulic continuously variable transmission aims at overcoming the defects existing in the prior art, can achieve multistage large-range continuously variable performance, and also can meet the multimode requirements for a vehicle driven under different operation conditions.
Owner:HENAN UNIV OF SCI & TECH
Automobile epidemic prevention and sterilization control method and device and storage medium
PendingCN111569099AGuarantee the environmentReduce health threatsAir-treating devicesLavatory sanitoryVehicle engineeringReliability engineering
The invention discloses an automobile epidemic prevention and sterilization control method and device and a storage medium, and belongs to the technical field of vehicle engineering. The method comprises the steps that whether epidemic prevention and sterilization control needs to be conducted in an automobile or not is determined; and when it is determined that epidemic prevention and sterilization control needs to be conducted in the automobile, at least one ultraviolet lamp installed in the automobile is controlled to conduct ultraviolet irradiation in the automobile so as to conduct epidemic prevention and sterilization on the automobile. When it is detected that the automobile needs to be subjected to epidemic prevention and sterilization control, at least one ultraviolet lamp in theautomobile is controlled to conduct ultraviolet irradiation in the automobile, so that epidemic prevention and sterilization control over the automobile is achieved, and therefore bacteria appearing in the automobile and threats of the bacteria to the health of passengers are reduced.
Owner:CHERY AUTOMOBILE CO LTD
Shift strategy dynamic-optimization method based on deep reinforcement learning
ActiveCN110716550ASolve problemsSolve the problem of dynamic optimizationPosition/course control in two dimensionsVehiclesDynamical optimizationControl engineering
The invention belongs to the fields of engineering machinery and vehicle engineering, and particularly relates to a shift strategy dynamic-optimization method based on deep reinforcement learning. Theshift strategy dynamic-optimization method based on deep reinforcement learning comprises the following steps that (1), the state input variable and action output variable of a shift strategy are determined; (2), the Markov decision process of the shift strategy is determined according to the state input variable and the action output variable; (3), according to the shift strategy objective, a reward function of the reinforcement learning shift strategy is established; (4), the deep reinforcement learning shift strategy is solved according to the Markov decision process and the reward function; (5) a prediction Q network calculated in the step (4) is put in a shift strategy controller, during the driving process of engineering machinery and vehicles, the engineering machinery and the vehicles select gears according to the shift strategy controller; and (6), the prediction Q network is regularly updated in the driving process. The shift strategy is updated through a deep reinforcementlearning method to realize the dynamic optimization of the shift strategy.
Owner:NANJING UNIV OF SCI & TECH
Power transmission system of automobile and automobile
InactiveCN109228841AImprove powerHybrid vehiclesGas pressure propulsion mountingElectric power transmissionDrive shaft
The invention discloses a power transmission system of an automobile and the automobile, which belongs to the technical field of vehicle engineering. The system comprises an engine, an engine brake, afirst electric machine, a second electric machine, a planetary gear train, a planetary gear clutch, a dual clutch system, a planetary gear train ring gear brake and a third gear box. A first transmission end of the planetary gear train is sequentially connected with an engine brake and an engine transmission through a transmission shaft, a second transmission end of the planetary gear train is respectively connected with a planetary ring gear brake and a first electric machine through a transmission shaft, and a third transmission end of the planetary gear train is drivingly connected with one end of a dual clutch system; A planetary gear clutch is disposed between the planetary gear train and the first electric machine; The other end of the dual clutch system is drivingly connected to the first transmission end of the third gear transmission, the second transmission end of the third gear transmission is drivingly connected to the second motor, and the third transmission end of the third gear transmission is drivingly connected to the wheels of the vehicle.
Owner:CHERY AUTOMOBILE CO LTD
Rigidity and damping multistage adjustable oil-pneumatic suspension and control method
ActiveCN111137095AImprove comfortImprove securityResilient suspensionsHydraulic cylinderHydropneumatic suspension
The invention relates to a rigidity and damping multistage adjustable oil-pneumatic suspension and a control method, and belongs to the field of combination of hydraulic and pneumatic engineering, mechanical engineering and vehicle engineering. The rigidity and damping multistage adjustable oil-pneumatic suspension comprises a hydraulic cylinder, a damping valve, a switch electromagnetic valve andan energy accumulator, the energy accumulator adopts a diaphragm type energy accumulator, an oil cavity of the energy accumulator and a nitrogen chamber are separated by an energy accumulator diaphragm, and the energy accumulator comprises a first energy accumulator A and a second energy accumulator B which are respectively connected with switch valves 9 and 10 in series; a damping adjusting mechanism comprises two switch electromagnetic valves 7 and 8, three throttle valves 4, 5 and 6 and a one-way valve 3, the throttle valves 5 and 6 are respectively connected with the switch electromagnetic valves 7 and 8 in series, and the throttle valves 4, 5 and 6 are connected with one another in parallel. According to the rigidity and damping multistage adjustable oil-pneumatic suspension system,the rigidity and damping can be adjusted according to loads and road conditions, the adaptability of a vehicle to different roads is improved, the driving performance of the vehicle is improved, and the rigidity and damping multistage adjustable oil-pneumatic suspension has the advantages of being convenient to disassemble and assemble, reliable in work, capable of effectively improving the driving comfort and safety of the vehicle and the like.
Owner:JIANGSU UNIV
Track generation method capable of reducing magnetic interference of fixed-wing unmanned aerial vehicle platform
ActiveCN110672092AReduce magnetic interferenceUnique angleNavigational calculation instrumentsNavigation by terrestrial meansMagnetic disturbanceUncrewed vehicle
The invention relates to a track generation method capable of reducing magnetic interference of a fixed-wing unmanned aerial vehicle platform, is applicable to magnetic interference control on fixed-wing unmanned aerial vehicle avionics devices and belongs to the technical field of magnetic sensing. The method provided by the invention further reduces interference of a fixed-wing unmanned aerial vehicle magnetic field on onboard high-precision equipment by generating specific track points which do not interfere with task execution under the premise that the magnetic interference of the platform can not be completely eliminated after magnetic compensation is performed on a fixed-wing unmanned aerial vehicle in advance; and the method has the advantages of low cost, easy operation, high track point precision and easy realization. Besides, the method provided by the invention can also be operated even under the condition of being lack of a professional knowledge background, so that the method can be widely applied to task path planning in fixed-wing unmanned aerial vehicle engineering application.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Electrical control system for pure electric bus
ActiveCN104890532AGuaranteed normal operationFirmly connectedSpeed controllerElectrodynamic brake systemsDrive wheelDrive motor
The invention discloses and provides an electrical control system, with excellent performance, for a pure electric bus. The electrical control system comprises a power battery set (1), a drive motor (2) and a motor controller (3), wherein an operation control circuit (4) is arranged in the motor controller (30; the drive motor (2) is connected with a drive wheel of a bus; the system further comprises a whole bus controller (5), a battery management system BMS upper computer (6), a BMS display screen (7) electrically connected with the battery management system BMS upper computer, a combined meter (8), an electronic brake system (9), a blast pump motor (10), a steering-assisted oil pump motor (11), an input / output module (12) and a first power supply converter (13). The electrical control system disclosed by the invention can drive the pure electric bus to be more excellent in performance which is as excellent as that of a modern oil-driven bus, is free of pollution, environmentally-friendly and energy-saving. The electrical control system can be applied to the field of vehicle engineering.
Owner:ZONSON SMART AUTO CORP
Remote control parking control method and device for automobile and storage medium
The invention discloses a remote control parking control method and device for an automobile and a storage medium, and belongs to the technical field of vehicle engineering. The method comprises the following steps: in the process of remote control parking, acquiring a function safety requirement of the automobile, wherein the functional safety requirement is the requirement for achieving safe parking of an automobile, and the functional safety requirement includess at least one of a function safety requirement of unexpected system quitting, a function safety requirement of barrier detection function loss, a function safety requirement of unexpected vehicle longitudinal acceleration, a function safety requirement of vehicle speed limiting function loss, a function safety requirement of reverse gear control, a function safety requirement of unexpected gear control and a function safety requirement of vehicle steering function loss; according to the function safety requirement, obtainingcontrol information of automobile parking; and controlling the automobile according to the control information. Functional safety requirements are set for the automobile, so that the functions of theautomobile in the remote control parking process meet the safety requirements, and the safety of remote control parking is improved.
Owner:CHERY AUTOMOBILE CO LTD
Corrugation evaluation method for guiding corrugated track maintenance
ActiveCN105608312AGuaranteed operational safetyImprove reliabilityInformaticsSpecial data processing applicationsVehicle engineeringReliability engineering
The invention discloses a corrugation evaluation method for guiding corrugated track maintenance. The method comprises the following steps: segmenting a wave length influence quantity value L of a corrugated rod section, a wave depth influence quantity value D of the corrugated section, a vibration effective value influence quantity value G and sustaining kilometer post length K of the corrugated section, which are obtained through calculating the track detection parameters of the corrugated section, into N sections with sub-section lengths K according to a calculation formula of N=int(K / k)+1, wherein the wheel track acting force influence quantity value of each section is An, calculating the maintenance decision value W of each corrugated section of the track through a track corrugation comprehensive maintenance decision function, and determining whether to maintain according to the size of the W value of each section; and deciding the priority according to the size of the W value of each section and then guiding the track corrugation maintenance. According to the method disclosed in the invention, the track engineering and the vehicle engineering are combined to carry out track state system engineering estimation, the track corrugation maintenance is guided, the maintenance mode is optimized, the maintenance effect is estimated, the wheel track acting force relation can be optimized and the train running safety can be ensured.
Owner:GUANGZHOU METRO GRP CO LTD +1
Novel three-brake shoe drum brake mechanism
ActiveCN110454520AIncrease profitImprove uneven wearBraking membersBrake actuating mechanismsFatigue damageEngineering
The invention discloses a novel three-brake shoe drum brake mechanism, and belongs to the technical field of vehicle engineering. The mechanism comprises a shell, a driving gear shaft, a central special-shaped gear, connecting arms and brake shoes; a driving gear shaft hole, a central shaft hole and fixed pin mounting holes are formed in the shell, wherein the driving gear shaft is arranged in thedriving gear shaft hole, the central special-shaped gear is arranged in the central shaft hole, and the driving gear shaft and the central special-shaped gear are connected through gear teeth to forma gear driving pair; three brake shoes are arranged in the shell, and each adjacent brake shoes are connected through a reset spring; the driving gear shaft is arranged in the brake shoes; the central special-shaped gear is connected with the brake shoes through the connecting arms; and the connecting arms are arranged in the fixed pin mounting holes. According to the mechanism, the motion mode of the brake shoes is changed, the utilization rate of the brake surfaces of the brake shoes is improved, and the problem that the brake surfaces of the brake shoes are uneven in abrasion is solved; and a gear actuation mode is adopted, so that the fatigue damage of the brake mechanism is improved, and the transmission efficiency is improved.
Owner:GAOYOU SHUNDA POWER MACHINE
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