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247 results about "Power performance" patented technology

Gearbox for oil-electric double-engine ship

The utility model discloses a gearbox for an oil-electricity double-engine ship. The gearbox comprises a box body, the diesel oil input component comprises a first input shaft, a first driving gear is sleeved on the first input shaft, and the first input shaft is provided with a first transmission gear and a first clutch; the reversing shaft part comprises a reversing shaft, a second driving gear is sleeved on the reversing shaft, the reversing shaft is provided with a second transmission gear and a second clutch, and the second transmission gear is meshed with the first transmission gear; the motor input component comprises a second input shaft, the second input shaft is sleeved with a third driving gear in an empty mode, the third driving gear is meshed with a first driven gear, the second driving gear is fixedly sleeved with the first driven gear, and the second input shaft is provided with a third clutch; the output shaft component comprises an output shaft and a second driven gear, and the second driven gear is meshed with the first driving gear and the second driving gear. According to the scheme, the diesel engine or the motor is independently used for driving, intelligent switching of the diesel engine and the motor can be achieved at any speed, oil consumption is reduced, and power performance is improved.
Owner:HANGZHOU ADVANCE GEARBOX GRP

Power control method for hybrid power engineering vehicle and engineering vehicle

The invention discloses a power control method for a hybrid power engineering vehicle and the engineering vehicle. The hybrid power engineering vehicle comprises a range extender system and a power battery. The method comprises the steps that vehicle working condition information and the charge state of a power battery are obtained; determining a current applicable power distribution mode according to the vehicle working condition information and the charge state; the power distribution mode refers to a control strategy for managing the output power of the range extender system and the power battery; and executing a power distribution mode to coordinate the output power of the range extender system and the power battery. Thus, based on the real-time running state and the energy state of the vehicle, the most suitable energy control strategy is dynamically and intelligently determined and executed, it can be ensured that instantaneous power outbreak and long-term fuel consumption economy can be flexibly considered in the vehicle running process, the balance between the power performance and the economy of the whole vehicle is achieved, and the vehicle safety is improved. And the energy management efficiency and the energy utilization level of the whole vehicle are improved.
Owner:ZOOMLION MINING MACHINERY (CHANGSHA) CO LTD

A multi-directional joint module for a robot

The application provides a multi-directional joint module for a robot, and relates to a robot joint, which comprises a first rotating assembly having an end face gear rotating about a first axis, a second rotating assembly arranged on the first rotating assembly and rotating about a second axis, the first axis being orthogonal to the second axis, the second rotating assembly comprising a second rotating shaft, a first lateral gear being fixed on the second rotating shaft and engaged with the teeth of the end face gear, and an output unit being fixedly connected with the second rotating shaft and rotating about the second axis, the output unit being capable of realizing multi-directional rotation in a plane perpendicular to the first axis through the combined motion of the first and second rotating assemblies. Thanks to the central symmetrical arrangement of the second rotating assembly and the supporting assembly, the power performance and load capacity are significantly improved, and high integration and space utilization are realized.
Owner:HUNAN UNIV OF SCI & TECH +1

Method and device for simulating and checking dynamic performance of electric vehicle

The invention provides a power performance simulation checking method and device for an electric vehicle, and solves the technical problem that the development period and the development capability of the whole vehicle are deficient due to the lack of power performance simulation checking service in the overall design of the existing vehicle. The method comprises the following steps: acquiring an initialization parameter of a subsystem related to a vehicle dynamics model; forming a power simulation model of the power system according to the initialization parameters; calculating the operation power and the operation torque of the driving motor according to the power simulation model, and forming a performance characteristic fitting curve according to the rotating speed of the driving motor; fitting a maximum acceleration curve according to the performance characteristic fitting curve in combination with the initialization parameters; determining the acceleration time for the vehicle to reach the target speed according to the maximum acceleration curve; and determining the maximum speed achieved by the vehicle according to the maximum acceleration curve in combination with the initialization parameters. A simulation check service is provided for the overall design of the vehicle, the development period of the whole vehicle is shortened, and the digital research and development capability of the electric vehicle is effectively improved.
Owner:BEIJING INST OF SPECIALIZED MACHINERY

A design optimization method of a linear joint permanent magnet motor of a humanoid robot

The application discloses a kind of humanoid robot linear joint permanent magnet motor design optimization method, this method includes: based on the mechanical characteristics of human gait cycle to establish knee joint connecting rod mechanism dynamics model, extract characteristic working condition point and establish screw-motor electromechanical matching criterion, using Latin hypercube sampling to obtain design sample point, establish permanent magnet motor multi-objective optimization model with limit torque, torque ripple, efficiency as target, then introduce evolutionary algorithm for global optimization, obtain Pareto non-inferior solution set;Finally, based on CRITIC-TOPSIS evaluation method, fusion objective data characteristics and subjective working condition demand, determine the optimal design scheme from Pareto non-inferior solution set.The design optimization method of the application can define the design requirements of permanent magnet motor, and can also scientifically distribute the target weight, ultimately can obtain the permanent magnet motor scheme highly matched with specific joint working condition, effectively improves the power performance and operating stability of humanoid robot linear joint.
Owner:CHONGQING UNIV

Double-piston mechanism for internal combustion engine and internal combustion engine

The invention belongs to the technical field of internal combustion engine power devices, and discloses a double-piston mechanism for an internal combustion engine, which comprises a cylinder body, and more than one cylinder is arranged in the cylinder body; an air inlet seat and an air outlet seat are installed on the upper portion and the lower portion of the cylinder body respectively, an air inlet pipe and an air outlet pipe are arranged in the air inlet seat and the air outlet seat respectively, and an air inlet channel and an air outlet channel are arranged in the air inlet pipe and the air outlet pipe respectively. A control device for gas distribution is arranged at the corresponding position of each cylinder; a high-pressure oil pump is arranged outside the cylinder body, and the high-pressure oil pump is communicated with the oil sprayer through a high-pressure oil pipe; a piston assembly I and a piston assembly II are symmetrically arranged in each cylinder body, and a bevel gear set I and a bevel gear set II which are matched with the piston assembly I and the piston assembly II to transmit power are further arranged in each cylinder body. The power performance of the internal combustion engine can be improved through the two piston assemblies, the device is small in size and light in weight, and single-machine fuel consumption and operation cost are effectively reduced.
Owner:沈万伦

An energy-saving control method, device and medium for an electric truck

The embodiment of the application discloses an energy-saving control method and device for an electric truck and a medium. The method comprises the following steps: determining a preset reference motor efficiency high-efficiency area based on vehicle information of the electric truck; obtaining current road condition information and accelerator pedal opening degree information, and adjusting the preset reference motor efficiency high-efficiency area based on the current road condition information and the accelerator pedal opening degree information to obtain an actual motor efficiency high-efficiency area; starting a vehicle preset economy mode when the electric truck is in a non-full load state; obtaining a current rotating speed and a current torque of the electric truck when the vehicle is running in the vehicle preset economy mode; and adjusting a driving rotating state of the electric truck based on the actual motor efficiency high-efficiency area, the current rotating speed, the current torque and a preset double-speed-ratio drive axle, so as to realize energy-saving control of the electric truck. Through the above method, the vehicle energy-saving can be realized while the power performance of the vehicle is maintained.
Owner:潍柴新能源商用车有限公司

Method and apparatus for determining the power limit value of a power battery

ActiveCN116278948Bdriving safetySolve the working conditions that cannot cover the fast response of vehicle speedElectrical testingOther databases indexingPower batteryElectrical battery
This invention discloses a method and apparatus for determining the power limit value of a power battery. The method includes: acquiring target operating condition data of the vehicle; determining a first power limit ratio value of the power battery in a pulse temperature rise table based on a first temperature value and the target temperature value of the power battery; determining a second power limit ratio value of the power battery based on the vehicle's power performance target data and target evaluation data; determining the minimum value between the first and second power limit ratio values ​​as the target power limit ratio value of the power battery; and determining the power limit value of the power battery based on the target power limit ratio value and the allowable power value of the power battery. This invention solves the technical problems that high-temperature power limit protection methods for batteries cannot cover operating conditions with fast vehicle speed response, and cannot simultaneously consider the safety of battery and vehicle use, vehicle power performance, and user experience.
Owner:CHINA FAW CO LTD

Planetary gear type centrally-mounted motor with double bearings for positioning

The invention discloses a dual-bearing positioning planetary gear type middle motor, which comprises a shell assembly, a controller assembly, a planetary speed reduction assembly and a rotor assembly, and is characterized in that all core transmission parts coaxially rotate around a main shaft to form a compact axial layout; the main shaft adopts a double-bearing positioning structure, so that the rotation stability and the positioning precision are improved. The planetary reduction assembly is a core adjusting mechanism, an outer gear ring can rotate forwards and backwards under the transmission cooperation of an adjusting motor, a worm and a worm gear ring, and then the reduction ratio is flexibly adjusted. The shell assembly and the controller assembly adopt a double-sealing structure to improve the waterproof performance, a torque sensor is arranged in the second shell, the detection end of the torque sensor is connected with a spindle spline, and intelligent adjustment of the reduction ratio is achieved in cooperation with a controller. The device has the advantages of being compact in structure, small in size, small in vibration, adjustable in reduction ratio, reliable in sealing and high in intelligent degree, can adapt to different driving working conditions of the light electric vehicle, and improves the power performance and the cruising ability.
Owner:SUZHOU WANJIA ELECTRIC

Energy management method, device and equipment of hybrid power system and storage medium

The invention discloses an energy management method, device and equipment of a hybrid power system and a storage medium. The method comprises the steps that a five-point control strategy of an engine is determined through a multi-island genetic algorithm and a target optimization function, and the target optimization function takes the minimum energy consumption as an optimization target; determining a power distribution strategy of a range extender and a power battery by combining a power following control strategy with the five-point control strategy; determining a power change rate limiting coefficient of the range extender through a fuzzy control strategy according to the real-time running state data of the vehicle; and determining the final power of the range extender and the power battery based on the power change rate limiting coefficient and the power distribution strategy. According to the method, the genetic algorithm is introduced, the power following control strategy and the fuzzy control strategy are combined to determine how to distribute the power of the range extender and the power battery, the hybrid power system can give consideration to the dynamic property and the economical efficiency under various working conditions, and efficient energy management is achieved.
Owner:STATE GRID JIANGSU ELECTRIC VEHICLE SERVICE CO LTD

Driving system and automobile

The utility model belongs to the field of power transmission, and particularly relates to a driving system and an automobile. The driving system comprises a first input shaft, a second input shaft, an intermediate shaft, four transmission assemblies, two gear switching assemblies and a controller, the first input shaft is used for being connected with a first power source and a second power source, the second input shaft is used for being connected with a third power source, and the intermediate shaft is arranged between the first input shaft and the second input shaft; the first transmission assembly and the second transmission assembly are both connected with the first input shaft and the intermediate shaft, and the third transmission assembly and the fourth transmission assembly are both connected with the second input shaft and the intermediate shaft. The controller is used for controlling the first gear switching assembly and the second gear switching assembly to selectively transmit power to the intermediate shaft through at least one of the four transmission assemblies so as to achieve multi-gear switching. The driving system provides a wider speed ratio selection range, and different power sources can operate in respective high-efficiency areas for a long time, so that the dynamic property and the economical efficiency of the whole vehicle are improved.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD

High-speed energy-saving driving system based on motor alternate start-stop and grouping power battery rotation

The application relates to the technical field of electric automobile power drive control, and discloses a high-speed energy-saving drive system based on motor alternate starting and stopping and group power battery rotation, which comprises a vehicle controller, two or more drive motors, independent motor controllers, a power coupling disengaging mechanism and group power batteries; when the vehicle enters a high-speed driving working condition, the vehicle controller controls the entry into an alternate driving mode: only one motor works at the same time, and the remaining motors are powered off and mechanically disengaged to eliminate the drag loss; the motors are rotated according to a period, a temperature or an efficiency threshold value; the group power batteries are one-to-one corresponding to the motors and are synchronously rotated to supply power, so that the battery discharge rate is reduced; the system makes the motor keep operating in a high-efficiency interval, reduces the continuous large-current discharge loss and heating, thereby reducing the power consumption of the vehicle in high-speed driving, improving the real high-speed endurance, and automatically switching to multi-motor parallel driving in complex working conditions such as sudden acceleration and climbing, so that the energy saving and power performance are considered.
Owner:王清伟

Adaptive torque control method for ECO mode of pure electric vehicle based on fuzzy algorithm

The invention relates to the field of vehicle control of pure electric vehicles, in particular to a pure electric vehicle ECO mode self-adaptive torque control method based on a fuzzy algorithm, which comprises the following steps: acquiring a reference boundary curve of driving and feedback torque of an ECO mode; according to a motor rotating speed interval, a plurality of fuzzy control areas are predefined between the reference boundary curves, and each fuzzy control area is associated with a fuzzy gain strategy which aims at a set driving scene and takes a vehicle real-time state as input; vehicle state parameters including the motor rotating speed, the whole vehicle load, the road gradient and accelerator pedal information are obtained in real time; according to the vehicle state parameters, judging a current driving scene and matching the current driving scene to a corresponding fuzzy control area; and performing real-time compensation on the reference torque of the ECO mode by applying a fuzzy gain strategy associated with the fuzzy control region, and outputting a final torque instruction. And on the premise of meeting the power performance and the comfort performance, the cruising ability is further improved.
Owner:SINO TRUK JINAN POWER CO LTD

Electronic gear shifting device for electric motor cycle

ActiveCN116241649BSpeed controllerOperating modesMotor controllerThrottle position sensor
This invention relates to an electronic gear shifting device for electric motorcycles, comprising an electronic shifting unit, an electronic clutch unit, and a throttle position sensor. Based on the rider's operation, the device outputs a shift signal, a clutch signal, and a throttle opening signal. A vehicle controller receives these signals and determines a target gear for the electric motorcycle. The vehicle controller then looks up a motor torque command based on the target gear and outputs the command to a motor controller. The motor controller then controls a power motor of the electric motorcycle, enabling the electric motorcycle to simulate the power performance of a conventional geared motorcycle without the need for a physical clutch or gearbox.
Owner:KWANG YANG MOTOR LTD

A high-integration pure electric all-terrain vehicle power assembly mechanism

This utility model relates to a highly integrated powertrain mechanism for a pure electric all-terrain vehicle, including a motor and a cooling water circulation channel. The power output end of the motor is connected to the gearbox of the all-terrain vehicle. The motor is equipped with a first housing and a second housing. The cooling water circulation channel is connected in series inside the motor, the first housing, and the second housing. The inlet and outlet ports of the cooling water circulation channel are connected to the water-cooling system of the all-terrain vehicle. The first housing houses an on-board charger and an on-board power converter, while the second housing houses a motor controller and a power distribution unit. The wiring between the motor and the first housing uses a stacked busbar and a PCB harness, and the wiring between the first and second housings also uses a stacked busbar and a PCB harness. This highly integrated powertrain mechanism for a pure electric all-terrain vehicle integrates existing pure electric all-terrain vehicles into a coordinated whole, resulting in high energy conversion efficiency and strong power performance.
Owner:LUOYANG UTV VEHICLES LTD

Intelligent optimization method for electric truck transmission gear ratio

The application relates to the technical field of new energy automobile power system design and optimization, and discloses an intelligent optimization method for transmission speed ratio of an electric truck, which comprises the following steps: 1.1. According to the whole vehicle parameters, performance indexes and working condition load characteristics of the electric truck, the power, torque and rotating speed of the driving motor are matched and parameter configured; 1.2. Based on the whole vehicle energy consumption characteristics and the endurance mileage demand, the energy, capacity and voltage parameters of the power battery are optimized and configured; 1.3. The constraint conditions that the transmission speed ratio needs to meet are analyzed, including the maximum vehicle speed, climbing ability and acceleration performance. The transmission speed ratio of the electric truck is optimized through a multi-objective evolutionary algorithm improved by a deep Q network, the power performance and economic performance indexes can be comprehensively considered, and multi-objective optimization of the transmission speed ratio parameters is realized. Compared with the traditional optimization method, the application can not only effectively balance the power performance indexes such as the acceleration time and the climbing ability, but also significantly reduce the energy consumption per 100 kilometers, and improve the economy of the whole vehicle.
Owner:INNER MONGOLIA UNIV OF TECH

Vehicle control method and device, processor and vehicle

The invention discloses a vehicle control method and device, a processor and electronic equipment. The method comprises the steps that various driving signals generated in the driving process of a vehicle are monitored; in response to a plurality of driving signals including a target driving signal in a failure state, performing data prediction on the target driving signal through a plurality of data prediction paths to obtain a plurality of predicted driving data, the data prediction paths being used for representing paths for performing data prediction on the target driving signal, and the data prediction paths being used for representing paths for performing data prediction on the target driving signal; the predicted driving data is used for representing a prediction result of the driving data corresponding to the target driving signal; based on the multiple pieces of predicted driving data, a control strategy of the vehicle is determined, and the control strategy is used for representing a rule for controlling whether the vehicle is kept in a normal driving mode or not; and calling the control strategy to control the vehicle to run. The technical problem that the limitation of the power performance of the vehicle is high is solved.
Owner:FAW JIEFANG AUTOMOTIVE CO

Fuel and air separated compression type internal combustion engine

The invention belongs to the technical field of engines, and discloses a fuel and air separated compression type internal combustion engine which comprises a cylinder A and a cylinder B. The internal combustion engine further comprises a driving mechanism arranged on the outer wall of the cylinder A; the connecting block is mounted on the outer walls of the cylinder A and the cylinder B through a mounting mechanism; wherein the driving mechanism comprises a chain wheel A, the outer wall of the chain wheel A is in transmission connection with a chain wheel B through a chain, the outer wall of the chain wheel B is fixedly connected with a bevel gear A, the outer wall of the bevel gear A is meshed with a bevel gear B, and the outer wall of the bevel gear B is fixedly connected with a half gear; through separated compression design of the cylinder A and the cylinder B on air and fuel, the compression ratio is greatly increased to strengthen the acting efficiency, the power performance of the internal combustion engine is improved, the problem that a traditional internal combustion engine is low in efficiency is solved, the combustion efficiency of a medium in the cylinder B can be improved through engine waste heat, and then the utilization rate of the waste heat is increased.
Owner:金荣国

Multi-working-condition performance matching scaling fan blade design method based on power mapping

The invention discloses a multi-working-condition performance matching scaling fan blade design method based on power mapping, and relates to the field of fan blade design. Determining a Reynolds number under the scale of the scaled fan model to establish a low Reynolds number airfoil profile set, and performing performance evaluation on airfoils in the low Reynolds number airfoil profile set to select an optimal airfoil profile; setting thrust matching objective functions under various working conditions based on the selected optimal airfoil to perform parameter optimization, redefining a matching mechanism of the power performance of the scaled fan and the prototype to set a power mapping matching objective function, and integrating all the objective functions to generate a comprehensive optimization objective function to perform scaled fan blade parameter optimization. Blade parameter optimization is carried out by adopting an optimization algorithm with a new search position self-verification process; according to the multi-working-condition performance matching scaled fan blade design method based on power mapping, the power mapping mode and the multi-working-condition thrust performance matching mode are combined, and complete reproduction of scaled fan model aerodynamic performance on a standard prototype fan is achieved.
Owner:FUZHOU UNIV

Motor linear overmodulation method and device, vehicle and storage medium

The invention discloses a motor linear overmodulation method and device, a vehicle and a storage medium, and the method comprises the steps: obtaining a reference voltage component and a DC bus voltage of a motor, and obtaining a reference voltage amplitude and a reference voltage phase angle according to the reference voltage component; a modulation coefficient is obtained according to the reference voltage amplitude and the direct-current bus voltage, the working area of the motor is judged according to the modulation coefficient, and the working area is divided into a linear modulation area, an overmodulation I area and an overmodulation II area according to the modulation coefficient; and when the working area is the overmodulation II area, obtaining a dynamic weight coefficient according to the reference voltage phase angle, and controlling the motor according to the dynamic weight coefficient. Therefore, when the working area of the motor is the overmodulation II area, the motor is controlled according to the dynamic weight coefficient obtained by the voltage phase angle, so that the voltage jump of the overmodulation II area is eliminated, the power performance of the electric vehicle driving system is improved to the maximum extent, and meanwhile, the output smoothness is ensured.
Owner:CHINA FAW CO LTD

Transmission control system based on series-parallel hybrid power driving device

The invention discloses a transmission control system based on a series-parallel hybrid power driving device in the technical field of hybrid electric vehicles. The transmission control system comprises a vehicle information acquisition module, a vehicle-mounted control panel and a hybrid power execution module. The hybrid power execution module comprises an internal combustion engine, a motor, a clutch, a first planetary gear train and a second planetary gear train; the vehicle information acquisition module is used for acquiring rotating speed information of an output shaft of a vehicle in real time and sending the rotating speed information of the output shaft to the control panel; the control panel is based on standard rotating speed information corresponding to the gear shifting instruction of the clutch at the current time; the control panel compares the rotating speed information of the output shaft at the current time with the rotating speed information of the standard cone, judges the current motion state of the vehicle, and adjusts the power output at the current time based on the motion state of the vehicle, so that the power output of the motor and the internal combustion engine can be adjusted according to different conditions of the current road; the power performance and the economic performance of the vehicle are improved.
Owner:GUANGXI VOCATIONAL & TECH COLLEGE OF LOGISTICS

Method and system for adaptively setting parameters of power controller of electric vehicle

The invention provides an electric vehicle power controller parameter adaptive setting method and system, and relates to the technical field of electric vehicle control, and the method comprises the steps: obtaining a motor torque feedback signal, carrying out the wavelet decomposition, extracting a working condition identifier, determining a phase margin and an amplitude margin offset based on Fourier transform, and obtaining a motor torque feedback signal; parameters are adjusted in combination with a gradient projection algorithm and a primal-dual interior point algorithm, and an optimal parameter vector is obtained through a multi-target particle swarm optimization algorithm. According to the invention, on-line adaptive adjustment of the control parameters is realized, and the power performance and the energy efficiency performance of the electric vehicle are improved.
Owner:WUXI TAICHEUNG ELECTRONICS TECH

Hybrid power tractor power matching system capable of considering working condition adaptability

The invention relates to the technical field of tractor power systems, in particular to a hybrid power tractor power matching system capable of considering working condition adaptability. An ECU, a storage battery management unit, a driving motor control unit, a transmission control unit, a working condition prediction control unit, an oil tank, an engine, a generator, an inverter, a storage battery, a driving motor, a transmission, a rear axle and a PTO shaft are arranged in the tractor body. The ECU is in signal connection with the storage battery management unit, the motor control unit, the transmission control unit and the working condition prediction control unit. According to the hybrid power tractor power system considering the working condition adaptability, the parameter optimization model with the equivalent fuel consumption of the hybrid power tractor as the target function and the power performance of the tractor as the constraint condition is established, parameter optimization is carried out, and the economical efficiency of the hybrid power tractor is improved.
Owner:HENAN UNIV OF SCI & TECH

An adjustable flow gas injection valve

The present application relates to the technical field of fuel injection components for dual-fuel and gas engines, and particularly relates to an adjustable flow gas injection valve; comprising a gland, a solenoid valve assembly, a valve housing, a limiting block, a valve sheet, a valve seat, a locking retainer, an internal hexagonal cylindrical head screw, an armature, an O-shaped sealing ring, a return spring, an elastic retainer and a wire welded filter screen. The present application adjusts the lift by rotating the valve seat after the valve seat is installed in the valve housing, and after the lift is determined, the valve seat is locked again by the locking retainer to improve the connection strength of the valve housing and the valve seat. In addition, the valve housing and the valve seat are respectively engraved with scale lines and pointer lines, and the lift value can be read on site while rotating the valve seat, so that the flexible adjustment of the injection flow of the gas injection valve is realized in the production and assembly stage, so that the injection flow of the valves in the same batch is kept highly consistent, the power performance of the engine is improved, and the structure is simple, easy to realize and high in adjustment precision.
Owner:CHONGQING HONGJIANG MACHINERY CO LTD

Unmanned aerial vehicle fan blade on-resistance measuring equipment

The utility model relates to the field of wind power equipment detection and maintenance, in particular to unmanned aerial vehicle fan blade conduction resistance measuring equipment which comprises an unmanned aerial vehicle connecting plate, a connecting rod is installed on the top of the unmanned aerial vehicle connecting plate, a damping assembly is installed on the connecting rod, and a threaded groove is formed in the top of the connecting rod. The top of the connecting rod is fixedly connected with a copper net support through a bolt, threaded holes matched with the bolt are formed in the top of the copper net support, copper net clamping plates are installed on the top of the copper net support and are two annular plates, and a plurality of threaded holes are formed in the tops of the annular plates and the top of the copper net support. The annular plate is fixedly connected with the copper net support through bolts, the connecting rod comprises an upper connecting rod fixedly connected with the bottom of the copper net support, and the threaded groove is formed in the top of the upper connecting rod. The problem that when an existing unmanned aerial vehicle measures the resistance of the fan blade, the control difficulty and the power performance requirement of the unmanned aerial vehicle are high is solved.
Owner:ANHUI JINLI LIGHTNING PROTECTION ENGINEERING TECHNOLOGY CO LTD

A nozzle structure optimization method of a methanol in-direct injection engine

The present application relates to nozzle structure design and liquid film separation optimization technical field, specifically, the present application relates to a kind of nozzle structure optimization method of methanol direct injection engine, the present application aims at solving the problem that the fixed radius of chamfer of the outlet of the orifice of traditional nozzle cannot be adjusted dynamically with the inherent surface roughness of the outlet edge, which leads to the real-time viscosity fluctuation of methanol, and affects the power performance of engine.The surface roughness of the outlet of the orifice is quantified by atomic force microscope nanoscale scanning, combined with the viscosity of methanol under different working temperature, a dynamic mapping table is constructed by numerical simulation to match the correction coefficient of liquid film contact angle, the viscosity of methanol is determined according to real-time temperature and the correction coefficient is queried, the liquid film adhesion compensation value is calculated by algorithm model, the design size of the chamfer radius of the outlet of the orifice is adjusted dynamically, the chamfer radius control is realized by using pulse laser ablation technology combined with real-time monitoring, the viscosity and roughness change are adapted, the uniformity of liquid film separation is improved, and the combustion efficiency is optimized.
Owner:FUJIAN MINGYANG MARINE CO LTD +1

A drivetrain system for off-road rally cars and a race car equipped with the drivetrain system

This invention relates to the field of motorsports technology, and more particularly to a transmission system for an off-road rally car and a race car equipped with the transmission system. The system includes a frame and a transmission system mounted on the frame. Wheels are mounted on the frame via a suspension system. The transmission system includes a gearbox mounted at the rear of the frame and a differential mounted at the front of the frame; the gearbox and the differential are connected by a first driveshaft positioned at the front and rear. The suspension system includes front steering knuckles located inside the two front wheels, both of which are fixed to the front side of the frame via upper and lower double wishbone suspensions. This off-road rally car has advantages such as lighter weight, more compact structure, better handling, superior passability, and higher safety. The lighter vehicle has sufficient power performance, and its low self-friction resistance during travel improves its ability to traverse uneven roads, reducing the risk of rollover and thus improving race performance.
Owner:SHANDONG TRANSPORT VOCATIONAL COLLEGE

Driving system and automobile

The utility model belongs to the field of power transmission, and particularly relates to a driving system and an automobile. The driving system comprises a first input shaft, a second input shaft, an intermediate shaft, four transmission assemblies, two gear switching assemblies and a controller, the first input shaft is used for being connected with a first power source and a second power source, the second input shaft is used for being connected with a third power source, and the intermediate shaft is arranged between the first input shaft and the second input shaft; the first transmission assembly and the second transmission assembly are both connected with the second input shaft and the intermediate shaft, and the third transmission assembly and the fourth transmission assembly are both connected with the first input shaft and the intermediate shaft. The controller is used for controlling the first gear switching assembly and the second gear switching assembly to selectively transmit power to the intermediate shaft through at least one of the four transmission assemblies so as to achieve multi-gear switching. The driving system provides a wider speed ratio selection range, and different power sources can operate in respective high-efficiency areas for a long time, so that the dynamic property and the economical efficiency of the whole vehicle are improved.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD

Method for calculating torque of distributed loading vehicle and distributed loading vehicle

This invention provides a method for calculating the torque of a distributed loading vehicle and the distributed loading vehicle itself. The calculation method includes: obtaining the actual required torque based on the driving state, the battery's limited power, and the motor's rotational speed; distributing the actual required torque evenly to the front and rear axles, and further distributing the torque of the front axle to the two motors on the front axle and the torque of the rear axle to the two motors on the rear axle based on the steering angle, thus obtaining the required torque for all four motors; obtaining the axle slip ratio and axle acceleration, and if at least one of the following conditions is met: the slip ratio is greater than a preset slip ratio threshold, and the axle acceleration exceeds a preset acceleration threshold, then the required torque for the two motors corresponding to the abnormal axle is transferred, wherein the abnormal axle is the axle that meets the conditions. Therefore, it is possible to actively intervene in the torque of the abnormal axle after detecting slippage or lock-up, thereby improving vehicle safety, ensuring vehicle power performance, and reducing wheel wear.
Owner:WEICHAI POWER CO LTD

A vehicle engine control method, device, equipment and storage medium

The application discloses a vehicle engine control method, device, equipment and storage medium, wherein the method comprises the following steps: according to the tire circumference, the gearbox speed ratio of each gear, and the rear axle speed ratio, gear conversion is performed to determine the vehicle speed corresponding to the current gear of the vehicle; according to the vehicle speed corresponding to the current gear of the vehicle and the engine speed, an engine acceleration limit value is obtained; based on the engine speed change rate, the engine acceleration limit value, the current vehicle speed and the actual torque, it is judged whether the vehicle engine enters an acceleration limiting mode, and when it is determined that the acceleration limiting mode is entered, the speed of the vehicle engine is controlled. The application can reduce the noise of the vehicle, reduce the fuel consumption of the vehicle, and does not affect the power performance of the vehicle.
Owner:DONGFENG COMML VEHICLE CO LTD