14results about How to "Improve drivability" patented technology

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.

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.

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 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.

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 application relates to an engine starting control method and device for a hybrid vehicle, which comprises the following steps: after completing the current starting of the engine, if it is judged that the starting time data meets the predetermined condition, a first coefficient corresponding to the working temperature at the current starting of the engine is calculated according to the starting time data; if it is judged that the first coefficient determines that the clutch torque capacity adaptation needs to be adjusted, the clutch torque capacity adaptation corresponding to the working temperature is adjusted according to the first coefficient and a predetermined compensation amount, and the adjusted clutch torque capacity adaptation and the working temperature are stored correspondingly, wherein the adjusted clutch torque capacity adaptation is used for the next starting of the engine corresponding to the working temperature, so that the clutch torque capacity adaptation can be adjusted frequently, the clutch torque capacity adaptation can converge at different temperatures, and the driving performance is improved.

This invention provides a near-zero carbon emission control system and method for internal combustion engines based on hydrogen fuel-assisted combustion. It includes an intelligent hydrogen fuel supply subsystem for receiving engine torque demand signals and calculating initial hydrogen supply parameters based on these signals; a combustion control and optimization subsystem for real-time monitoring of the combustion state in the engine combustion chamber and establishing a three-variable online optimization model of the in-cylinder combustion quasi-dimensional dynamics model based on the combustion state; and a collaborative main control subsystem for solving for optimal control parameters, dynamically optimizing and adjusting supply parameters and / or ignition parameters using a composite control strategy, predicting future engine load changes, and controlling the hydrogen supply. This invention significantly suppresses nitrogen oxide formation while ensuring high indicated thermal efficiency, and simultaneously avoids excessive emissions due to air-fuel ratio imbalance during transient processes, thus improving vehicle drivability and fuel economy.

The application discloses a kind of hybrid gearbox parallel driving mode switching method and switching system, and the actual speed of current vehicle is obtained by vehicle information module, the brake pedal depth of current vehicle, the actual engine speed of current vehicle, the target driving mode of vehicle, the actual driving mode of vehicle, the target gear of vehicle, the actual gear information of vehicle;Controller is preprocessed to the data information obtained by reading vehicle information module;According to each data information, the switching of vehicle parallel driving mode is judged, and the control instruction is output according to the judgment result, and a variety of judgments are used to exit parallel driving mode in different ways, considering the actual gear of vehicle under parallel driving mode, the actual speed of vehicle, the actual engine speed of current vehicle, avoid the whole vehicle gear shaking and high speed high noise problem, improve the driving performance of whole vehicle, so that vehicle can smoothly exit parallel driving mode, improve the comfort of whole vehicle.