18 results about "Tractive effort" patented technology

A vehicle includes a system and method of modeling and controlling tractive effort of a wheel of the vehicle. The system includes an observer, a predictive controller, and an online solver. The observer receives dynamic model parameters of the wheel and determines an estimate of a wheel speed and an uncertainty of the wheel speed using a nonlinear model of the wheel. The predictive controller determines an average gain and a differential gain from the estimate of the wheel speed and the uncertainty of the wheel speed. The online solver calculates a motor torque and a wheel brake torque for increasing tractive effort of the wheel on a road based on the average gain and the differential gain. The motor torque and the wheel brake torque are applied on the vehicle.

The invention relates to a method for operating a drive of a work machine. The drive has a conventional maximum traction profile in which the maximum permissible traction of the drive increases as the output rotational speed of the drive decreases. The method includes receiving an activation signal for activating a grader operation of the work machine, where the grader operation has a limited maximum traction profile. The maximum permissible traction force of the drive device is less intensively increased with a decrease in the output rotational speed of the drive device in the case of a limited maximum traction force curve than in the case of a conventional maximum traction force curve. In addition, the method includes determining a current maximum allowable traction based on the limited maximum traction profile and comparing the current traction with the current maximum allowable traction. In addition, the method comprises adjusting the transmission ratio of the transmission mechanism towards a lower output speed of the driving device based on the comparison.

The invention relates to the technical field of vehicle parking, in particular to a multi-layer lifting transverse and longitudinal moving two-wheeled vehicle garage and a control method thereof.The multi-layer lifting transverse and longitudinal moving two-wheeled vehicle garage comprises a steel frame structure, a plurality of first-layer vehicle carrying plates and a plurality of second-layer vehicle carrying plates are arranged on one side of the steel frame structure, and the number of the second-layer vehicle carrying plates is one more than that of the first-layer vehicle carrying plates; the first-layer vehicle carrying plates are located at the bottoms of the corresponding second-layer vehicle carrying plates respectively, the excessive second-layer vehicle carrying plates are located at the bottom of the steel frame structure, pulley shafts are fixedly connected to the second-layer vehicle carrying plates, and movable pulleys are rotationally connected to the pulley shafts; the two-layer vehicle carrying plate is limited through the lifting limiting assembly, single-point lifting is carried out through the single movable pulley, uneven stress generated in the lifting process of the two-layer vehicle carrying plate is prevented, the stability of the two-layer vehicle carrying plate in the lifting process is improved, and through cooperation of the fixed pulley assembly and the movable pulley, the safety of the two-layer vehicle carrying plate is improved. The traction force required for lifting the second-layer vehicle carrying plate is halved, and the power output in the lifting process is reduced.

The invention relates to a vehicle traction system, a control method, a controller and a control device.The vehicle traction system comprises a traction power supply module, a power battery, a current transformation module and a topology switching module.The electrical connection state of a main current transformation branch is dynamically reconstructed through the topology switching module; the main current transformation branch circuits can be electrically isolated from one another in a pantograph power supply mode, and the fault branch circuit can be quickly isolated and blocked when any main current transformation branch circuit or a traction motor driven by the main current transformation branch circuit breaks down, so that fault expansion is effectively prevented, and the basic operation capacity of a vehicle is guaranteed; meanwhile, when a power battery power supply mode is switched to, a plurality of main current transformation branches can be electrically connected with one another, so that all power of a power battery is gathered to be supplied to a traction system, and it is ensured that the vehicle obtains continuous and sufficient traction force and an auxiliary power source under the working conditions of self-walking in a non-network area and over-equal working conditions; and the adaptability and the operation reliability under complex working conditions can be obviously improved.

The invention discloses a simplified running vehicle physical model adjusting method and device, is suitable for scenes such as games and simulation training, and runs on terminal equipment. The method aims at solving the problems that an existing model is complex in calculation and poor in adaptability, or simplified logic is fixed, and authenticity and performance are difficult to balance. The method comprises the following steps: determining an environment scene, a game type and a terminal equipment performance constraint; adjusting an air resistance coefficient and steering sensitivity according to game types, and adjusting an adhesion coefficient and a rolling resistance coefficient according to environment scenes; acquiring player input and converting the player input into a quantized value; calculating traction force, braking force and three kinds of resistance, and combining performance constraint to determine resultant force; correcting the parameters and the resultant force through slip response logic; and the vehicle motion state is updated and output to the rendering or interaction feedback module. The method can dynamically adapt to different scenes and terminals, reduce calculation overhead, reserve basic physical logic, avoid slipping and out-of-control, and effectively balance physical authenticity, user experience and operation efficiency.

The invention discloses a method and system for controlling the traction force of a vehicle body in a snowfield driving state, and the method comprises the steps that an ESC control module monitors the parameter information of the vehicle in the driving state through a sensor, and obtains a rolling resistance coefficient through calculation of a calculation module; the ESC control module judges the running state of the vehicle and judges whether the vehicle is in a deep snow running state or not, if yes, the road surface is calibrated, the slip rate offset is generated, and the ESC control module sends the slip rate offset to the traction force control module to adjust the output size of the traction force of the vehicle; through a calculation module, parameter information detected and collected by an ESC control module is calculated to obtain a rolling resistance coefficient, the slip rate offset is adjusted according to the change of the rolling resistance coefficient, and the slip rate offset is sent to a traction force control system to adjust the output of traction force. The control precision of the traction control system on a deep snow road surface can be improved, and the vehicle running speed is increased.

The invention relates to a fuel dispensing unit (1) for refuelling a vehicle, comprising a breakaway device (3) comprising a first shut-off valve unit (4) connected to a fuel supply line of the fuel dispensing unit (1) and a second shut-off valve unit (5) connected to a first end (6) of a fuel hose (7), the fuel hose (7) comprising a fuel nozzle (2) at a second end of the fuel hose (7). The first shut-off valve unit (4) and the second shut-off valve unit (5) are intended to be disconnected when a predetermined tractive force from the fuel hose (7) is exceeded to separate the fuel hose (7) from the fuel dispensing unit (1). The fuel dispensing unit (1) comprises a tilting means (8) fixed to an outer side portion (9) of the fuel dispensing unit (1) and supporting the breakaway device (3), such that the breakaway device (3) is inclined at a predetermined angle (α) with respect to the outer side portion (9) of the fuel dispensing unit (1).

Methods and systems for controlling a power take-off and engagement of an electric machine of an electric vehicle are described. In one example, a power take-off and engagement of a disconnect clutch are controlled in response to vehicle speed and tractive effort. A first electric machine is fixable coupled to a gear set of a transmission and the driveline disconnect clutch may selectively couple a second electric machine to the gear set.

This application provides a vehicle wheel speed control method, device, vehicle controller, storage medium, and vehicle. The method includes: acquiring a current first driving speed of a drive motor within the vehicle; determining a speed threshold matching the first driving speed, wherein the speed threshold is the maximum speed value reached by the drive motor at each time point under different requested torques; calculating a first difference between the speed threshold and the first driving speed when the first driving speed is greater than or equal to the speed threshold; and controlling the drive motor to adjust the first driving speed based on the first difference. This application addresses the problem in existing technologies where only a traction control system can handle situations such as vehicle sideslip or loss of steering ability, resulting in untimely control and a high risk of driving accidents.

A vehicle powertrain features a first electrical machine with first power electronics, a second electrical machine with second power electronics, and a transmission connected between the electrical machines and an output. To execute a powershift, the first and second electrical machines are operated so that one of the electrical machines is used as the main drive machine, and the other electrical machine is used for tractive force support during the execution of the powershift. When a temperature of at least one of the electrical machines and / or of at least one of the power electronics exceeds a temperature limit value, and / or when a target electric current flowing through at least one of the electrical machines and / or at least one of the power electronics exceeds a current limit value, a powershift is adapted to limit heating of the respective electrical machine and / or the respective power electronics.

The title of the invention is Method and apparatus for operating a vehicle in low traction environments. The present disclosure relates generally to vehicles, and more particularly to a method and apparatus for operating a vehicle in low traction environments. An example vehicle includes an active suspension system, an electric power steering system, and a controller configured to determine a wheel slip of at least one road wheel of the vehicle, and in response to the wheel slip exceeding a wheel slip threshold, cause a first road wheel of the vehicle to be in an in-toed position relative to a track position of the vehicle, and cause a second road wheel of the vehicle to be in an out-toed position relative to the track position of the vehicle.

The disclosure relates to a method for determining a height position that is to be set for a power lift mounted on a utility vehicle and coupled to an attachment for soil cultivation. A force sensor is used to determine an actual tractive force acting on the power lift. An additional sensor is used to determine at least one soil parameter of the soil that has been cultivated or is to be cultivated. The height position that is to be set is determined based on the actual tractive force and the at least one soil parameter. The disclosure also relates to a utility vehicle having a control unit for carrying out such a method.

The application discloses a reverse calculation method and system for engine pump wheel resistance torque in a vehicle sudden acceleration working condition, and relates to the field of vehicle dynamics simulation and engine bench test. The method comprises the following steps: acquiring vehicle parameters and establishing a hydraulic torque converter characteristic mapping table; calculating transient vehicle speeds at each discrete time point of sudden acceleration; comprehensively solving rolling resistance, air resistance and inertial tractive force to obtain total vehicle tractive force; reversely topologically calculating turbine end resistance torque and rotating speed along a transmission system; performing nonlinear calculation by using a multi-step smooth iteration algorithm to obtain engine dynamic rotating speed and pump wheel resistance torque; and generating and outputting a bench loading curve. The application comprehensively considers vehicle coupling resistance and hydraulic torque converter nonlinear characteristics, replaces traditional linear equivalence by step-by-step reverse deduction, significantly improves pump wheel resistance torque calculation precision, can generate high-fidelity dynamic loading instructions, truly restores engine actual stress state under a sudden acceleration working condition, and meets heavy and special vehicle bench transient test requirements.

The embodiment of the application provides a kind of determination method and device of road surface adhesion coefficient, storage medium, electronic equipment, wherein, the method comprises: according to the acceleration of target vehicle collected by sensor, determine the first road surface adhesion coefficient;According to the tractive effort of the target vehicle, determine the second road surface adhesion coefficient, and according to the change information of the target vehicle, determine the weight of the second road surface adhesion coefficient, wherein, the change information at least includes one of the following: throttle pedal opening degree change rate, brake pedal opening degree change rate, yaw angular velocity change rate;According to the first road surface adhesion coefficient, the second road surface adhesion coefficient and the weight of the second road surface adhesion coefficient, determine target road surface adhesion coefficient, solve the problem that the accuracy of road surface adhesion coefficient calculated in the related art is lower.

The application provides a vehicle traction control method and device, electronic equipment and a readable storage medium. The method comprises the following steps: in the case that the vehicle is in a motor power limited state, determining a limit value of wheel end traction of the vehicle according to a limit value of motor torque of the vehicle; obtaining a to-be-optimized value of the wheel end traction corresponding to a current driving mode of the vehicle in a plurality of driving modes; optimizing the to-be-optimized value based on the limit value of the wheel end traction to obtain an optimized value of the wheel end traction; and controlling the vehicle according to the optimized value. In this way, the user driving experience is improved, and the car driving performance is improved.

The invention relates to an effort assistance system in animal-drawn vehicles, formed by an animal-drawn vehicle incorporating a sensor unit (1) that detects the tractive or compressive force between the vehicle and animal and sends the obtained information to a processing control element, which also takes into account environmental conditions (3) regarding temperature, humidity and vital signs of the animal and provides a power value to be applied to a motor that acts on the wheel or wheels of the vehicle. The value may be a positive thrust value or braking value with energy recovery, as required.

The present application provides a method and apparatus for evaluating the operation continuity of a high-speed train during a fire. The method comprises: applying, to a system functional block to be evaluated in a train operation simulation model, a simulated ignition source corresponding to a preset fire type; determining whether said system functional block can maintain a corresponding operation capability within a preset fire resistance index time period; if said system functional block cannot maintain the corresponding operation capability, determining whether a redundant configuration exists; if no redundant configuration exists, determining whether a train is equipped with a firefighting system; if the train is not equipped with a firefighting system, configuring the train to operate in a degraded mode, and determining whether the tractive force of the train can maintain normal traveling on a preset route during operation; if the tractive force cannot maintain normal operation of the train, determining that said system functional block does not have operation continuity during a fire. The present application can comprehensively and efficiently evaluate the capabilities of systems to maintain the intended functions when a fire occurs on a high-speed train, thereby achieving precise monitoring of the fire prevention capabilities of high-speed trains and enhancing the fire safety performance of high-speed trains.

This application relates to a traction power holding control method, unit, device, and vehicle during power supply switching. Before the vehicle reaches the phase-splitting zone, if a phase-splitting warning signal is received, the power battery system is controlled to supply power to the intermediate DC circuit in a manner matching the voltage of the intermediate DC circuit, and the rectifier is controlled to gradually reduce the power drawn from the grid. When the real-time traction power obtained is less than the preset power, the main circuit breaker is controlled to open and block the rectifier. After the main circuit breaker is opened, the power battery system maintains the voltage stability of the intermediate DC circuit until the grid voltage obtained after passing through the phase-splitting zone is greater than or equal to the preset voltage. In this application, by continuously supplying power to the vehicle during the phase-splitting period, the longitudinal impulse of the train caused by traction unloading is avoided, and the stability of vehicle operation is improved. At the same time, the phase-splitting accident caused by a sudden drop in speed on uphill sections is avoided, ensuring the safety and continuity of train operation.