279 results about "Automobile handling" patented technology

The invention relates to a steering-mode adjustable electric automobile steering system and a control method. The steering-mode adjustable electric automobile steering system comprises two motors, a mechanical steering module, an electric assisting steering module and a steering-by-wire module, wherein the two motors are arranged on a steering column and a steering pinion respectively, the mechanical steering module, the electric assisting steering module and the steering-by-wire module are formed by three electromagnetic clutches and the like and are used for mechanical steering, electric assisting steering and steering-by-wire. The control method mainly includes the first step of carrying out system initialization, the second step of allowing an ECU to start the corresponding steering mode and carrying out control according to the steering mode selected by a driver, the third step of controlling the steering modes, and the fourth step of carrying out fault diagnosis and fault-tolerant control on the steering system. The steering-mode adjustable electric automobile steering system and the control method have the advantages that the same automobile has high control flexibility on the precondition of being simple in structure, and consequently switching of driving modes can be achieved; when one motor breaks down, an original steering mode can be switched to a steering column assisting type electric assisting steering mode or a pinion assisting type electric assisting steering mode or a mechanical steering mode, and consequently the operation stability, reliability and the fault-tolerance capacity of the automobile are improved.

The invention discloses an integrated control method for distributed control of an electric automobile. The integrated control method comprises the following steps of according to automobile speed, a steering wheel rotating angle and a steering wheel rotating angular speed, obtaining an expected yaw angular speed and an expected mass center sideslip angle by a signal processing layer by referring to a module; in an integrated control layer, according to the actual value of the yaw angular speed and the expected yaw angular speed, deciding a rear wheel additional yaw torque required for realizing control of the stability of the automobile; according to the actual valve of the mass center sideslip angle and the expected mass center sideslip angle, deciding the front wheel additional rotating angle required for realizing control of the stability of the automobile; in a control distribution layer, according to a target driving torque of a driver and the rear wheel additional yaw torque, reasonably distributing four-wheel driving force, and according to a target front wheel rotating angle of the driver and the front wheel additional rotating angle, correcting the front wheel rotating angle; and controlling the yaw stability by an executing layer through a hub motor. The integrated control method disclosed by the invention has the characteristics that the handling safety stability of the automobile is high, and the steering comfortability of the driver is improved.

The invention relates to an automobile log-in/starting system and an intelligent vehicle remote control and a control method thereof. The automobile log-in/starting system comprises the intelligent vehicle remote control, an automobile handle sensing system and a base station host, wherein the intelligent vehicle remote control and the base station host are in communicating junction; the intelligent vehicle remote control can transmit signals to the base station host and/ or receive a signal from the base station host; the base station host can detect the intelligent vehicle remote control and recognize and/ or judge the intelligent vehicle remote control; the base station host can transmit a signal to the intelligent vehicle remote control and/ or receive a signal from the base station host; and the automobile handle sensing system is in communicating junction with the intelligent vehicle remote control and/ or base station host and is used for detecting whether a automobile handle is contacted.

The invention discloses a four-wheel hub motor electric automobile intelligent steering control method. Drivers are classified by adopting a fuzzy C-mean clustering method; an RBF neural network is respectively established for the corresponding three driver types according to the driver types; expected transverse swing angle speed is determined correspondingly through corresponding types of the RBF neural networks according to different types of drivers; then a four-wheel hub motor electric automobile intelligent steering control model is established by utilizing fuzzy control; deviation of the expected transverse swing angle speed and actual transverse swing angle speed, deviation change rate and additional transverse swing moment are respectively converted into quantization levels in a fuzzy domain of discourse; and the fuzzy control model outputs the additional transverse swing moment, and the four wheels of an electric automobile are respectively controlled to perform steering according to the outputted additional transverse swing moment. The four-wheel hub motor electric automobile intelligent steering control method has characteristics of being high in automobile control safety and stability and can realize the function of intelligent steering of the automobile for people so as to enhance steering comfortableness of the drivers.

An adaptive cruise control system includes a yaw rate sensor for generating a first radius of curvature calculation representing a first projected vehicle path for the automobile, an optical sensor for generating optical sensory data and for generating a second radius of curvature calculation representing a second projected vehicle path for the automobile. A vehicle path calculation module is coupled to receive the first and second radius of curvature calculations and, responsive thereto, to weigh and combine the first and second radius of curvature calculations, and to thereby generate a third radius of curvature calculation representing a third projected vehicle path, and to produce modified yaw rate sensor data therefrom. A vehicle control module is coupled to receive the modified yaw rate sensor data and to control automobile maneuvering functions in response thereto.

The invention provides a system and method for monitoring and automatic undertaking of automobile hand-released driving. The system comprises a steering wheel torque sensor, a processor, a reminding unit and a control unit, wherein the steering wheel torque sensor is used to monitor a steering wheel torque value of a vehicle; the processor is used to receive torque value information monitored by the steering wheel torque sensor, judge whether corresponding hand-released driving conditions are satisfied according to the torque value information and send out a corresponding control signal according to the judgment result; the reminding unit is used to receive the control signal and send out corresponding reminding information; and the control unit is used to receive the reminding information, judge whether corresponding automatic undertaking conditions are satisfied according to the reminding information and start an automatic undertaking mode according to the judgment result. The system and method have the advantages that a driver can be reminded after the hand-released driving; the system will automatically undertake the vehicle if reminding fails and a danger alarm lamp can be turned on automatically; braking and parking can be achieved safely according to traffic situations, and a function of initiative vehicle parking can be achieved.

The invention belongs to the technique of an automobile electric power steering gear, and relates to an automatic clearance adjusting mechanism for a worm and gear of the automobile electric power steering gear. The automatic clearance adjusting mechanism comprises a steering shell (1), the worm wheel (2), the worm (3), a worm bottom bearing (4), a worm top bearing (5), and a worm top bearing clamping nut (6). The automatic clearance adjusting mechanism is characterized in that the worm top bearing (5) is a self-aligning ball bearing. An adjusting ring (8) is mounted in a mounting blind hole (1a) of the worm bottom bearing. An elastic push rod component (7) is mounted on a position, which corresponds to the mounting blind hole (1a) of the worm bottom bearing, of the steering shell (1). By the automatic clearance adjusting mechanism, automatic compensation to meshing clearance, which changes with external environment temperature, of the worm and gear of the automobile electric power steering gear can be achieved, and accordingly constant changing of driving feel is avoided, and stable operation of an automobile is guaranteed.

The invention relates to a differential power-assisted steering control system and method of a distributed driving electric vehicle. The system comprises a left-right front wheel differential power-assisted steering control module, an additional yaw moment force calculation module, a torque vector control additional yaw moment force calculation module, a left-right rear wheel torque distribution module and a motor control module; the left-right front wheel differential assisted steering control module conducts closed-loop control to obtain the torque of a left front wheel and the torque of a right front wheel according to the reference steering wheel moment force and the practical steering wheel moment force; the additional yaw moment force calculation module calculates additional yaw moment force generated by the left front wheel and the right front wheel according to the torque of the left front wheel and the torque of the right front wheel; the torque vector control additional yaw moment force calculation module calculates the generalized yaw moment force needed by the vehicle according to the vehicle state; the left-right rear wheel torque distribution module conducts distribution to obtain the torque of a left rear wheel and the torque of a right rear wheel according to the additional yaw moment force and the generalized yaw moment force needed by the vehicle; and the motor control module controls corresponding driving motors according to the torque of the left front wheel, the right front wheel, the left rear wheel and the right rear wheel. Compared with the prior art, according to the differential power-assisted steering control system and method of the distributed driving electric vehicle, the power-assisted steering function is conveniently achieved, improvement of low-middle-vehicle-speed steering handiness and middle-high-vehicle-speed driver road feel is achieved while the manipulating burden of a driver is reduced, and vehicle manipulating performance is improved.

The invention discloses a steering-by-wire system and a control method based on a kalman filter capable of divergence inhibition. The system comprises a steering wheel and a connecting mechanism of the same, a sensor of steering wheel turning angles, a sensor of steering wheel torque, a road sensing motor, a current sensor of the road sensing motor, a steering motor, a current sensor of the steering motor, a car speed sensor, a front wheel turning angle sensor, a gear-rack steering device, a position sensor, a filtering estimation module, a safety judgment module, a control signal superposition module and a steering electronic control unit. According to the invention, the kalman filter capable of the divergence inhibition is used for filtering prediction and estimation of postures of automobile motions; and the kalman filter with a divergence inhibition function acquires signals from the electronic sensors so as to estimate a real-time state of an automobile. The steering controller of the system disclosed by the invention can make the system have high interference inhibition performance on the premise of ensuring steering stability, so that high stability of automobile manipulation can be obtained.

The invention provides an automobile operation stability testing system based on a driver model and an automobile operation stability testing method. The driver model comprises a pre-scanning module, a pre-testing module, a comparing module and a control module, wherein the pre-scanning module obtains an anticipating track according to output of a trailing sensor installed on an automobile, the pre-testing module calculates a pre-testing track of automobile running according to output of a sensor inside the automobile, the comparing module enables the anticipating track and the pre-testing track to be compared and outputs deviation, and the control module calculates and outputs changing quantity of steering wheel corners through potential difference (PD) control according to the deviation. The anticipating track is a snakelike path on an automobile running path, the automobile runs around stakes along the snakelike path at setting speed, the testing system and the testing method calculate final steering wheel corners and output to the automobile to control the automobile to track the anticipating track to run according to the steering wheel corners obtained from automobile status information and the changing quantity of the steering wheel corners calculated by the driver model, and therefore, the automobile operation stability is tested.

The invention discloses an automobile driving-by-wire device and system and an automobile. The automobile driving-by-wire device comprises a driving-by-wire module and an external command interface, wherein the external command interface is in communication connection with the driving-by-wire module; the external command interface is used for receiving an automobile control command and transmitting the automobile control command to the driving-by-wire module; and the driving-by-wire module is used for controlling running of the automobile according to the automobile control command. According to the automobile driving-by-wire device and system and the automobile, running of the automobile can be controlled through the driving-by-wire module, and therefore, traffic accidents caused by automobile faults due to non-standard operation of drivers are avoided, and the automobile can be controlled to safely and reliably run on the road well.

The invention discloses an electronically controlled hydraulic power steering system having a transmission ratio changing function and a control method thereof. The electronically controlled hydraulic power steering system having the transmission ratio changing function comprises a steering mechanical unit, a valve-controlled electro-hydraulic position servo unit, a rotary valve opening degree regulating unit and an electronic control unit (ECU) which are connected in sequence, wherein the valve-controlled electro-hydraulic position servo unit provides an additional turning angle during automobile turning to change the transmission ratio of the turning angle of a steering wheel to the turning angle of front wheels and enhance the running stability of an automobile, a steering counter torque brought by the additional turning angle is factored into calculation of steering assist power, and the rotary valve opening degree regulating unit regulates the rotating speed of an oil pumping motor and the opening degree of a rotary valve according to a sensor signal and the steering counter torque. The valve-controlled electro-hydraulic position servo unit and the rotary valve opening degree regulating unit jointly complete control of the steering assist power and enable the electronically controlled hydraulic power steering system having the transmission ratio changing function to provide better steering road feeling and higher steering economical efficiency while improving the handling stability of the automobile and reducing the burden of a driver.

The invention belongs to the technical field of vehicle parameter measurement, and particularly relates to a recognition method for rotational inertia around z axis and tire cornering stiffness of an automobile. The method comprises the following steps: (1) operating steering wheel angle impulse test according to an automobile operation stability testing method to acquire data, wherein the data comprises a steering wheel angle, yaw velocity, lateral acceleration and a vehicle speed signal; (2) recognizing a transfer function of a vehicle system equivalent two-degree-of-freedom vehicle model through a least square method by using the data acquired by the step (1); (3) recognizing the yaw rotational inertia around the z axis and the tire cornering stiffness of the automobile included in the transfer function obtained by the step (2) through a nonlinear least square method. According to the method, the use of other large-sized experimental instruments is avoided, and the research cost is effectively reduced; the data used by the method is convenient to measure so as to finally facilitate modeling; the speed is high, quick development of research work is facilitated, and the method has higher practicability.

The invention discloses a driving control system of an electric automobile with rear wheels driven by independent motors. The driving control system comprises a driving controller and is characterized in that electric signal output ends of an left front wheel rotating speed sensor, a right front wheel rotating speed sensor, a left rear wheel rotating speed sensor, a right rear wheel rotating speed sensor, a Hall position sensor of a left driving motor, a Hall position sensor of a right driving motor, an accelerator pedal position sensor, a steering wheel rotating angle sensor and a braking sensor are connected with a corresponding signal input end of the driving controller respectively, power lines of the left rear wheel driving motor and the right rear wheel driving motor are connected with a corresponding output interface of the controller, and the driving controller is further provided with a CAN (controller area network) interface for communicating with the outside. The driving control system of the electric automobile with the rear wheels driven by the independent motors is suitable for driving control of the electric automobile with front wheels serving as steering wheels and the rear wheels driven by the independent motors, accurate in driving control algorithm, good in control effect and capable of improving transmission efficiency, reducing abrasion caused by slippage of tires, realizing handling stability of the electric automobile and guaranteeing safe traveling of the electric automobile.

The invention discloses an automobile light control system. The automobile light control system comprises an illuminance sensor, a camera, a video processor, a calculation module, a touch control screen and a controller. The camera is installed on the central axis of the front end and the rear end of an automobile. According to the automobile light control system, machine vision is used for replacing a driver and perceiving the front road conditions, and active control over following-up steering of headlamps rather than passive control is achieved. According to illuminance data surrounding the automobile collected by the illuminance sensor and video data collected by the camera, control commands are calculated through the calculation module and sent to a single chip microcomputer to be processed, the single chip microcomputer controls and drives the headlamps, rear lamps and steering lamps according to processed results, and thus automatic control over automobile light is achieved. Especially during turning, a front road is lightened for the driver in advance, so that the driver obtains the road conditions on the turning side in advance relatively easily during turning at a crossing where lamplight is relatively poor at night, and traffic accidents are reduced.

This invention discloses a automobile handle brake and acceleration control device, which comprises handle control push bar, sensor driver push bar movement sensor and the control circuit in current brake and oil system, wherein, the push bar is fixed on panel supportive bar and the drive processes brake or acceleration control through control push bar and the sensor to sense push bar position information into voltage signals; the brake operation voltage signals are sent to brake system to fulfill brake operation; the brake operation voltage signals are sent to brake system to fulfill brake operation.

The invention relates to a worm gear gap eliminating mechanism which comprises a shell, a worm wheel, a worm rod, a locking nut, a first check ring, a second check ring, an end cover, a first bearing and a second bearing, wherein the first bearing is fixed by the first check ring and the locking nut; a first elastic element generating a compressing force along the axial direction of the worm rod is arranged at the first bearing; the second bearing is fixed by the end cover and the second check ring; a second elastic element generating a compressing force along the axial and radial directions of the worm rod is arranged at the second bearing. The invention also relates to an electric power-assisted steering system with the worm gear gap eliminating mechanism and an automobile with the electric power steering system. The worm gear gap eliminating mechanism has the advantages that the radial meshing gap and meshing lateral gap of the worm wheel and the worm rod are simultaneously eliminated, the automobile steering noise is effectively reduced, and the control stability of the automobile is increased.

The invention discloses a testing system for automobile control stability. A steering wheel angle sensor, a gyroscope, a speed sensor, and a GPS module are used for obtaining automobile driving parameters; and a data processing unit analyzes the driving parameters. On the basis of comparison of a lateral acceleration value ad and a stable lateral acceleration threshold value a0, stability of automobile driving is determined, thereby realizing real-time detection on the automobile stability. The system has advantages of high precision and fast determination speed. Meanwhile, alarming and corresponding correction can be carried out on unstable situations timely. Besides, the provided testing system with the light weight has the excellent vibration-resistant and impact-resistant performance; and internal independent instruments can be dismounted conveniently. The system can be fixed on a co-driver seat and instrument signal cables can be received conveniently. In addition, the invention also provides a testing method for automobile control stability.

The invention discloses an automobile anti-theft tracing method and system and is applied to automobiles. The automobile anti-theft tracing method comprises the steps that the situation that external action of an automobile occurs is perceived, an automobile-mounted camera is started, and pictures are collected; a face image is extracted from the collected pictures; matching is conducted on the extracted face image and locally stored face images of legal users; and if no face image is successfully matched, then, the person corresponding to the extracted face image is judged to be an illegal intruder, and the face image of the illegal intruder is sent to a preset user. According to the automobile anti-theft tracing method and system provided by the invention, the face image which is judged to be the face image of the illegal intruder is sent to the preset user, so that the preset user conducts automobile tracing according to the face image of the illegal intruder.

The invention discloses an automobile anti-collision system. The automobile anti-collision system comprises an energy absorbing box connected with an automobile anti-collision beam and a front longitudinal beam in the front-back direction. The energy absorbing box comprises a main body, pushing rods, first pressing plates, first springs, a second pressing plate, a connecting seat, connecting rods,a sliding rail, sliding blocks, second springs and pistons. First partition cavities are formed in the end, close to the anti-collision beam, of the main body in an up-down symmetry mode. The first pressing plates are mounted in the first partition cavities through the first springs. The anti-collision system further comprises a main control module, a sensor detection module, a radio frequency module, a GPS positioning module, a display module, a pre-warning module and an execution module. The automobile anti-collision system integrates an energy absorbing box passive anti-collision mechanismwith the high energy absorption rate and the good anti-collision effect and active anti-collision control, automobile collision can be effectively prevented, the loss caused by automobile collision can be reduced to a great extent, the anti-collision effect is remarkable, thus the travelling safety is ensured, and practicability is high.

The invention relates to a vehicle parameter conditioning method based on a vehicle handling stability test evaluation system and belongs to the automotive field. The method comprises the steps of vehicle parameter conditioning, establishment of a vehicle dynamic simulation model, establishment of the vehicle handling stability test rapid evaluation system, vehicle performance comprehensive score calculation and target value judgment. According to the method, a theoretical basis is provided for vehicle parameter conditioning based on the vehicle handling stability test rapid evaluation system, vehicle handling stability can be optimized at an early stage of automobile product development, therefore, the market competitiveness of automobile products is effectively improved, and the brand effect of an automobile manufacturer is improved.

The invention provides a drive-by-wire automobile joystick structure which is suitable for multiple driving handfeel modes and integrates steering operation, braking operation and accelerating operation into a whole. The joystick drive-by-wire automobile control structure is characterized by being suitable for multiple driving handfeel modes, and the handfeel of a control system can be regulated according to the personal requirement of a driver. In the system, a joystick is of a two-freedom-degree angle output structure, wherein the transverse axis freedom degree corresponds to the steering operation, and the longitudinal axis freedom degree corresponds to the accelerating operation and braking operation. Magnetorheological dampers are arranged in the transverse direction and in the longitudinal direction, and the damping size of the magnetorheological dampers is controlled by an electronic control unit to regulate the handfeel during driving. In a device, the joystick is hinged to a box through a hinge, and a cross hollow support is arranged on the hinge to limit the joystick motion to be within two freedom degrees. Meanwhile, four sets of dampers and springs are installed in the cross support, wherein the dampers are used for regulating the control handfeel, and the springs are used for controlling a back joystick to be reset. At the tail end of the cross support, force sensors are connected with the springs to receive control information of the driver.

The invention discloses a lane change alarm system and method for automobile driving. The lane change alarm system for automobile driving comprises a distance sensor set, a speed detection module, a control module and a lane change alarm module. A preset angle is reserved between the detection direction of the distance sensor set and the automobile tail. The speed detection module is used for reading the current speed. The distance sensor set is used for obtaining the distance between at least one distance sensor and an obstacle in the detection direction. The control module is used for judging whether the distance obtained through the present distance sensor set meets the preset condition or not when the current speed exceeds the preset threshold value, and if yes, the control module controls the lane change alarm module to execute a lane change alarm. Through the lane change alarm system for automobile driving, a driver can be reminded that whether a lane change risk exists or not, and the situation that the driver changes lanes recklessly and consequently traffic accidents are caused is avoided.

The invention relates to the anti-theft field and discloses an automobile anti-theft method and system. According to the embodiment of the automobile anti-theft method and system, whether a person driving an automobile is the person authorized by an owner to drive or not is judged by carrying out fingerprint scanning recognition on the person driving the automobile; when the person is not the person authorized by the owner to drive, the owner can be informed in time, the driving track and the parking points of the automobile are located, the owner can dispose in time after receiving information, and thus material and finance losses brought thereby can be avoided.