43results about How to "Improve drivability" patented technology

The invention discloses a vehicle transmission clearance torque control method and device, equipment and a medium. The method comprises the steps that target curve data with the vibration amplitude exceeding the preset amplitude are screened out from a motor rotating speed curve; determining a dynamic gap curve and a static gap curve corresponding to the target curve data; screening out a target single-point dynamic gap of which the amplitude exceeds the amplitude of a corresponding single-point static gap in the static gap curve from the dynamic gap curve, so as to determine a target rotating speed corresponding to the target single-point dynamic gap in the target curve data; determining a target torque corresponding to the target rotating speed; and the original torque curve is corrected according to the target torque and is used for torque control of the vehicle. The dynamic gap is larger than the static gap so as to identify that the vehicle is in the transmission gap state in the moving process, and the torque change rate corresponding to the transmission gap state is adjusted, so that knocking between the driving gear and the driven gear is reduced, and the running stability and drivability of the vehicle are improved.

The invention relates to the field of automobile electronic control systems, and provides a method for controlling the use of an automobile clutch through a computer, which comprises the following steps of: 1, acquiring running data of an automobile in real time by using a sensor arranged on the automobile, and transmitting the acquired data to a central control unit for data analysis; determining the current state of the vehicle, the driving condition and the stage of the vehicle; 2, analyzing an operation mode of a driver and a vehicle state through an algorithm calculation module, recognizing a driving intention, and calculating stage change data according to the operation data of the vehicle; by integrating a gyroscope sensor and an intelligent gear shifting decision algorithm, the uphill or downhill state of the vehicle can be accurately recognized, and an optimal gear shifting decision is made. The driving performance of the vehicle under complex road conditions is improved, an engine and a battery are effectively protected, the service life of vehicle parts is prolonged, and accurate control over clutch operation is achieved through real-time monitoring and data analysis.

The invention discloses a gear shifting method, a gear shifting device, a vehicle and a storage medium, and relates to the technical field of vehicles, and the gear shifting method specifically comprises the steps that a target gear shifting position corresponding to a gear shifting hub is determined according to a target engine gear contained in a gear shifting instruction, and the gear shifting hub is controlled to move to the target gear shifting position; determining a target speed regulation parameter according to the target engine gear, and regulating the actual motor rotating speed of the motor to a target motor rotating speed corresponding to the target speed regulation parameter according to the target speed regulation parameter; and under the condition that the actual motor rotating speed of the motor reaches the target motor rotating speed, the hybrid power system is adjusted, so that the real-time engine gear of the engine is switched to the target engine gear. By the adoption of the gear shifting method and device, the vehicle can stably complete gear shifting operation.

The invention relates to a torque control method of a drive motor during a shift. The method comprises the steps that in the torque reduction stage of the gear shifting period, multiple torque reduction instructions are sent to a driving motor controller, the multiple torque reduction instructions have different torque reduction step lengths, the torque reduction slope is gradually increased in the initial time period of the torque reduction stage, and the torque reduction slope is gradually reduced in the end time period of the torque reduction stage.

The invention provides an intelligent driving closed-loop control method based on a pre-training large model. The intelligent driving closed-loop control method comprises the following steps: S1, obtaining full-quantity heterogeneous input data in a vehicle driving process; s2, performing feature coding on the total heterogeneous input data to generate feature data suitable for pre-training large model processing; s3, inputting the encoded feature data into a pre-trained large model for feature extraction, and outputting a key value pair; s4, constructing a plurality of task head sharing key value pairs in a cascade form, and generating intention-level and track-level outputs; s5, outputting and generating a vehicle control instruction according to the intention level and the track level to control the driving state of the vehicle; according to the method, full-quantity heterogeneous input features in a closed-loop form are constructed, so that the use efficiency of data is remarkably improved, and the most comprehensive feature representation is extracted from multi-source input, so that an output result with higher quality is generated; according to the method, the problems of information loss and accumulative errors in a traditional modular system are effectively solved, and the accuracy and reliability of decision planning are improved.

The invention discloses a driving mode switching control method and device for a strong hybrid vehicle, and the method comprises the steps: obtaining the remaining electric quantity percentage of a power battery pack of the vehicle, and determining the electric quantity grade of the power battery pack according to the remaining electric quantity percentage; a corresponding mode switching speedometer is determined according to the electric quantity grade, the accelerator opening degree of the vehicle is obtained, and a corresponding mode switching speed threshold value is found in the mode switching speedometer according to the accelerator opening degree; the current vehicle speed of the vehicle is obtained, and mode switching is conducted on the vehicle according to the comparison result of the current vehicle speed and the mode switching speed threshold value. The problem that in the prior art, economy is poor when the driving mode switching control of the strong hybrid vehicle is carried out is solved.

This invention discloses a method, device, and medium for generating animation scenes based on 3D reconstruction, belonging to the field of 3D reconstruction technology. The method includes: performing object identity merging and driveable 3D expression processing on the event-focused reconstruction sequence to generate a hierarchical 3D scene asset set; performing action boundary pairing processing on the hierarchical 3D scene asset set to generate a contact candidate boundary table; performing 3D boundary closure verification and structural compensation marking processing on the contact candidate boundary table to generate a scene boundary closure constraint table; and performing 3D scene asset scheduling and frame order driving processing according to the scene boundary closure constraint table to output an animation scene generation result set. This invention improves the structural continuity, driveability, and asset reuse stability of the 3D reconstruction-based animation scene generation results by dividing the event-focused partitions, configuring reconstruction density, and performing 3D boundary closure verification and structural compensation marking.

A hybrid powertrain (1000) and a vehicle (4000). The hybrid powertrain (1000) includes: a conversion device (10), a first motor (200), and an engine (300). At least one of the first motor (200) and the engine (300) is configured to selectively output power to a driving end through the conversion device (10). The engine (300) is configured to selectively output power to the first motor (200) through the conversion device (10), to drive the first motor (200) to generate electricity.

The present disclosure provides an airport shuttle control method and device, storage medium and airport shuttle, which can accurately determine the slip rate of the wheels on the airport shuttle by acquiring the speed of the airport shuttle and the wheel speed of the wheels, and based on the speed of the airport shuttle and the wheel speed of the wheels. When the wheel speed of the first wheel in the wheels is greater than the speed, and the slip rate is greater than the preset threshold, it can be determined that the first wheel of the vehicle slips in the normal driving process. By transferring at least part of the torque of the first wheel to the second wheel with a slip rate less than or equal to the preset threshold, the torque can be flexibly distributed, so that the second wheel with better adhesion rate obtains more torque, which is conducive to reducing the slip and improving the driving performance of the airport shuttle in the normal driving process.

The application provides a PWM torque control method, a motor controller and a readable storage medium, and the method comprises the following steps: obtaining motor original rotating speed information under the action of a PWM torque; performing filtering processing on the motor original rotating speed information to obtain vehicle inherent frequency rotating speed fluctuation information; determining a suppression torque according to the vehicle inherent frequency rotating speed fluctuation information; and taking the superposition result of the suppression torque and a vehicle demand torque as a target input torque of a PWM torque strategy. The application can effectively reduce the fluctuation amplitude of the vehicle in the case that the PWM torque function is started to improve the efficiency of the electric drive system, and thus the driving performance of the vehicle can be effectively improved.

The utility model discloses a heat dissipation system and a vehicle. The heat dissipation system comprises a compressor; the first heat exchanger is provided with a refrigerant inlet and a refrigerant outlet which are communicated with each other, and the first heat exchanger is provided with a first ventilation opening; the second heat exchanger is arranged on at least one side of the first heat exchanger and makes contact with the first heat exchanger in an attached mode, the second heat exchanger is provided with a cooling liquid inlet and a cooling liquid outlet which communicate with each other, and the second heat exchanger is provided with a second ventilation opening; the fan assembly corresponds to the first ventilation opening and the second ventilation opening; and the controller is electrically connected with the compressor and the fan assembly. Therefore, the air volume can be increased through the fan assembly, the cooling effect on the cooling liquid is improved, and the cooling effect on the cooling liquid can be selectively achieved through the first heat exchanger, so that the heat dissipation capacity of the heat dissipation system can be improved, and the heat dissipation system can adapt to various working conditions.

Provided is a pharmaceutical composition with which an adequate constipation treatment success rate is achieved in pediatric constipation patients aged 1 to 5. The pharmaceutical composition is for treating constipation and contains magnesium oxide as an active ingredient, the pharmaceutical composition being characterized in being orally administered twice a day to pediatric patients aged 1 to 5 and having a body weight of 7.5 kg or above, so that the dosage of magnesium oxide administered per day is 25 to 45 mg / kg.

The invention discloses a Tipout torque control method in the starting process of a dual-clutch transmission. The Tipout torque control method comprises the steps that an input signal is received and processed; calculating Tipout control activation conditions according to the input signal, wherein the Tipout control activation conditions comprise an accelerator opening signal, a clutch starting state, a TCS control state and an engine real torque; s3, entering Tipout control and starting timing, and detecting the control duration time in a Tipout state; s4, the clutch feed-forward torque is calculated according to the difference value between the target rotating speed and the idle speed of the engine; s5, judging whether the control duration time in the Tipout state is greater than a set threshold value or not; and S6, the clutch combination torque recovery slope is calculated. According to the invention, the problem of whole vehicle impact caused by continuous increase of engine torque and increase of clutch torque combination amount when an accelerator is loosened due to'delay 'factors such as an engine throttle valve is well solved, and NVH performance and driving comfort are improved.

The invention provides a federated learning-based rail transit driving strategy optimization method and system. The method comprises the following steps: after a data user issues a federal learning task, each training node performs reinforcement learning training on a local initial Q network based on respective historical data of a rail transit driving strategy to obtain a respective local Q network decision model; each training node uploads an intermediate gradient parameter of a local Q network decision model of the training node to the block chain network where the training node is located; performing model aggregation operation on each intermediate gradient parameter by each consensus node in the block chain network to obtain a global Q network decision model, and broadcasting the global Q network decision model in the block chain network; and the data user performs rail transit driving strategy optimization based on the global Q network decision model. According to the method, a reasonable optimization strategy can be formulated, the operation efficiency of the urban rail transit system is effectively improved, energy consumption is reduced, and the comfort level of passengers is improved.

The invention relates to the technical field of automobile control, in particular to a carbon tank opening degree control method and device, a medium and a vehicle control unit. In the dynamic opening and closing process of the carbon tank, when the carbon tank is not in the diagnosis process, the target opening degree of the carbon tank is obtained, and filtering is calculated according to the current opening degree of the carbon tank and the target opening degree to obtain the filtered carbon tank opening degree; and according to the opening of the filtering carbon tank, driving the carbon tank to open and close for several times, so that the error between the current opening and the target opening of the carbon tank is within the preset filtering range. On the premise that carbon tank diagnosis is prevented from being affected, the opening degree of the carbon tank is properly controlled in the opening and closing process of the carbon tank, so that rotating speed fluctuation caused by air-fuel ratio changes due to dramatic changes of the opening degree of the carbon tank is improved. And the driving performance, the emission performance and the fuel economy of the motorcycle under the condition are improved.

The present invention provides a motor current control method, device, equipment, storage medium and vehicle, and relates to the field of vehicle technology. The method of the present invention includes: when the requested current of the motor is greater than a first preset current threshold, a frequency reduction control strategy is executed; when the cumulative time that the requested current is greater than the first preset current threshold exceeds the preset time, a derating control strategy is executed. The present invention improves the drivability and comfort of the vehicle by first executing a frequency reduction control strategy when the requested current of the motor is greater than the first preset current threshold, avoiding serious loss of power and meeting the peak torque demand; then, when the cumulative time that the requested current is greater than the first preset current threshold exceeds the preset time, a derating control strategy is executed. By reducing the rated power of the motor, the maximum output of the motor can be limited to a certain extent, avoiding overload operation of the motor under high temperature conditions, improving the reliability and life of the motor, and thus improving the safety of the vehicle.

The invention discloses a longitudinal speed estimation method and device of a vehicle. According to the scheme, the driving state parameters of a vehicle at the current moment and the longitudinal vehicle speed of the vehicle at the previous moment are obtained; the driving state parameters comprise the longitudinal acceleration of the vehicle and the wheel speed of each wheel; determining the wheel state of the vehicle at the current moment based on the driving state parameter at the current moment and the longitudinal vehicle speed at the previous moment; the wheel state is used for representing whether each wheel slips or not; determining a vehicle speed estimation mode matched with the wheel state from a plurality of preset vehicle speed estimation modes based on the wheel state; and estimating the longitudinal vehicle speed of the vehicle at the current moment based on the vehicle speed estimation mode and the driving state parameters. According to the technical scheme, the longitudinal vehicle speed of the vehicle at the current moment is determined through the vehicle speed estimation mode matched with the wheel state, and the accuracy of longitudinal vehicle speed estimation of the vehicle is improved.

This application relates to a transmission, a powertrain system, a vehicle, and a method for operating the transmission. Specifically, a transmission (1) for a vehicle (100) includes: a first shiftable gear unit (10) and a second shiftable gear unit (20); and a sub-transmission unit (30) drivably connected to an output shaft (50), the sub-transmission unit (30) being capable of shifting between at least a low gear and a high gear, the first shiftable gear unit (10) selectively transmitting torque from a first input shaft (11) to the sub-transmission unit (30), and the second shiftable gear unit (20) selectively transmitting torque from a second input shaft (21) to the sub-transmission unit, wherein the transmission (1) is also capable of shifting to a bypass state, in which the second shiftable gear unit (20) shifts to a bypass state, such that power can be transmitted from the second input shaft (21) to the output shaft (50) without passing through the sub-transmission unit (30).

The present invention discloses a vehicle-mounted equipment shock absorbing device and a carrier vehicle, wherein the vehicle-mounted equipment shock absorbing device comprises an equipment assembly plate, an assembly plate adapter assembly and a first shock absorber. The equipment assembly plate is provided, the equipment is assembled on the equipment assembly plate, and the assembly plate adapter assembly is provided on the side of the equipment assembly plate. The first shock absorber is connected to the bottom of the assembly plate adapter assembly, which increases the distance between the shock absorbers in the width direction, so that the top surface of the first shock absorber and the bottom surface of the equipment assembly plate are not at the same height. The height difference reduces the height of the assembled equipment and increases the distance between the shock absorbers in the width direction, reduces the center of mass height, reduces the swing amplitude of the equipment during vehicle driving, and reduces the risk of damage to the shock absorber and the structure of each connection.

The present invention relates to a torque learning method and a hybrid power module. A torque learning method for a hybrid vehicle is disclosed. The hybrid vehicle includes an engine for generating engine torque, an electric motor for generating motor torque, a separation clutch, a transmission and a clutch device. The separation clutch is arranged between the engine and the electric motor to selectively connect or disconnect the transmission of the engine torque of the engine. The clutch device is arranged between the electric motor and the transmission to selectively connect or disconnect the transmission of the motor torque of the electric motor and / or the engine torque of the engine to the transmission. The torque learning method includes: when a torque learning condition is met, controlling the clutch torque of the separation clutch so that the absolute value of the difference between the rotation speed of the engine and the rotation speed of the electric motor reaches a predetermined value, and storing and associating the motor torque of the electric motor with the clutch torque of the separation clutch.

The application discloses a vehicle cruise control method, device and system. The method comprises the following steps: in response to a user triggered vehicle cruise recovery operation, obtaining a current driving speed and a first transmission gear position at a current time of an automatic transmission; determining a current recovery acceleration according to the current driving speed and a target cruise speed to be recovered to; determining a first required output torque matched with the first transmission gear position; performing iterative adjustment of the transmission gear position according to the current recovery acceleration and the first required output torque, determining a second required output torque meeting a target torque condition and a second transmission gear position corresponding to the second required output torque; and sending the second required output torque and the second transmission gear position to an engine controller and a transmission controller respectively for execution, so that the vehicle performs cruise acceleration at the current recovery acceleration. The technical scheme of the application improves the smoothness of the vehicle recovery cruise acceleration process, and greatly improves and enriches the vehicle driving performance.

The application provides a fuel cell energy balance control method, a system and a vehicle, and relates to the technical field of power batteries.The fuel cell energy balance control method provided by the application comprises the following steps: obtaining a preset input signal, determining a SOC balance control stage of a fuel cell according to the preset input signal, identifying a working condition control mode according to the preset input signal and the SOC balance control stage, and performing target power optimization according to the SOC balance control stage and the working condition control mode to determine target power of the fuel cell and a target power output duration.The application can realize active overcharge and overdischarge energy control, for example, control of overcharge and overdischarge energy ranges, efficient fuel cell energy balance control, solution to the double high-cost problem of large power of an electric pile and large capacity of a battery in an existing fuel cell vehicle, and improvement of battery safety and vehicle driving performance.

The application discloses a new energy automobile air conditioner refrigerating system VCU control method, in the process of vehicle driving, the speed parameter and the temperature parameter in the vehicle are used to control the air conditioner system refrigeration; the VCU detects the surface temperature of the air conditioner evaporating dish, and then controls the compressor rotating speed, so as to achieve the purpose of shock absorption and noise reduction. By changing the control strategy of the VCU to the air conditioner system, the vibration and noise caused by the compressor body during idling and low-speed driving are effectively reduced, a quiet and comfortable driving space is provided for the driver and passenger, the comfort and drivability of the driver and passenger are improved, the air conditioner pipeline is protected, damage caused by over-refrigeration of the compressor is avoided, the cost caused by redesign and development of the compressor and re-vehicle arrangement is effectively reduced, and the application can be popularized and applied in solving similar problems of other new energy projects.

A torque control system for a drive system of an electric vehicle includes: a controller generating a front wheel torque command and a rear wheel torque command having a torque value distributed from a required torque for driving of the vehicle according to a torque distribution mode selected among a plurality of torque distribution modes based on vehicle driving information; and the front-wheel motor and the rear-wheel motor are controlled according to the torque command output by the controller. The controller determines whether switching between the plurality of torque distribution modes occurs; calculating a torque correction amount for reducing a backlash shock based on a backlash estimation value in the drive system of a zero-crossing torque command among the front wheel torque command and the rear wheel torque command during mode switching; and performing torque correction on another torque command that does not cross zero using the calculated torque correction amount.

The utility model discloses a kind of mechanical throttle pedal signal acquisition devices, it is related to the technical field of pedal, including suspension type pedal mechanism, signal conversion module;Pedal mechanism includes pedal seat, throttle pedal and pull rod;Pedal seat is installed on fixed frame;The front end of throttle pedal is rotationally installed on pedal seat, its rear end extends rearward and is installed with foot pedal in cantilevered mode;Throttle pedal is provided with torsion spring between pedal seat;Pull rod is fixed at the front end of throttle pedal, and extend in the direction away from throttle pedal;The other end of pull rod is hinged with pull line ring, and pull line ring is fixed with throttle pull line;Signal conversion module includes sensor support and linear displacement sensor;Linear displacement sensor includes detection body and telescopic rod;Telescopic rod is always abutted on pull rod. Through the cooperation of suspension type pedal mechanism and signal conversion module, the accurate detection to throttle pedal position change is realized.

Provided is a drug for preventing, alleviating or treating adhesion and a use thereof. A fibroblast which has been subjected to external stimulation in a body cavity contains an activated negative regulatory receptor PEAR1. The deletion of the fibroblast PEAR1 can significantly promote in vivo mucosal adhesion formation. A PEARI agonist can specifically inhibit fibroblast activation, synthesize an extracellular matrix, and ameliorate the adhesion lesion. By administering the PEARI agonist, the formation of adhesion can be effectively prevented. Also provided is a PEARI agonistic antibody that does not affect the repair and healing of normal tissue and does not cause the tissue to be in an anoxic state. Moreover, the antibody drug has a long half-life, is easily diffused, has few side effects, and has a convenient route of administration.

This invention discloses a method, apparatus, and vehicle for controlling the engine of a hybrid vehicle. The method includes: when the hybrid vehicle's engine is in a start-up standby state, determining the current activation mode of the engine using engine torque signals, motor torque signals, gear signals, control pedal signals, and parking status signals; performing feedback adjustment calculations on a first speed and a second speed to obtain a first torque, wherein the first speed is the input shaft speed of the hybrid vehicle's transmission, and the second speed is the real-time engine speed of the hybrid vehicle; calculating the difference between the second speed and a third speed to obtain a second torque, wherein the third speed is the real-time motor speed of the hybrid vehicle; determining a target torque based on the first torque, the second torque, and the current activation mode; and performing drive control on the engine according to the target torque. This invention solves the technical problem of low control accuracy in related technologies for controlling hybrid vehicle engines.

The invention provides a vehicle braking energy recovery control method and system. The method comprises the steps that the maximum recovery torque value corresponding to a wheel end system in a hybrid vehicle is calculated in real time; the sliding energy recovery torque and the driving motor power generation torque correspondingly generated in the operation process of the hybrid vehicle are calculated in real time, and the corresponding braking energy recovery available electric power is calculated in real time according to the maximum recovery torque value, the sliding energy recovery torque and the driving motor power generation torque; calculating an electric braking recovery maximum capacity limit and a generator maximum power generation capacity limit corresponding to the hybrid vehicle in real time based on a preset rule; and according to the electric braking recovery maximum capacity limit and the generator maximum power generation capacity limit, braking energy recovery request torque and generator request torque calculated corresponding to the hybrid vehicle are limited so as to complete corresponding braking energy recovery control. The problem of over-charging or over-discharging of the brake recovery battery pack can be solved, the brake recovery efficiency can be improved, the energy consumption of the whole vehicle is reduced, the endurance mileage of the whole vehicle is increased, and the user experience is correspondingly improved.

The present invention discloses a hybrid vehicle wheel demand torque drivability filtering method, which divides the wheel demand torque into intervals, adopts different filtering methods in each interval, and determines the filtering time constant by designing and searching a Map diagram, including: wheel demand torque arbitration; defining the boundary of an increasing interval of wheel demand torque and the boundary of a decreasing interval of wheel demand torque; calculating and judging the state of the wheel demand torque interval; judging the current wheel demand torque range and determining the wheel demand torque interval; determining the filtering method according to different wheel demand torque intervals; designing a Map diagram according to a hybrid mode and searching for the filtering time constant of the corresponding filtering method.