177 results about "Electronic power steering" patented technology

The invention relates to an automatic parking system of information fusion of multiple sensors. The automatic parking system comprises an ultrasonic control module, an image processing module, an electronic assisting steering control module, a speed control module and a finished vehicle control module. The ultrasonic control module can collect the distance between a parking space and a vehicle and between surrounding obstacles and the vehicle so as to achieve the function of recognizing the parking space. The image processing module can collect parking environment information surrounding the vehicle and adjust a virtual parking space in an image so as to achieve the function of parking space matching. The electronic assisting steering control module can perform steering control of the vehicle according to track information so as to achieve the track control function. The speed control module can control the running speed of the vehicle so as to achieve the low-speed control function of the vehicle. The finished vehicle control module can generate a parking track according to the position relation between the vehicle and the parking space, wherein the position relation is obtained according to an image processing system. In addition, the finished vehicle control module can generate a corresponding control signal to control the vehicle to finish parking operation.

A steering system selectively operable in one of six modes: steer-by-wire with rear steering, steer-by-wire without rear steering, electronic power assist steering (EPAS) with rear steering, electronic power steering (EPAS) without rear steering, mechanical backup manual steering with rear steering, and mechanical backup manual steering without rear steering. The steer-by-wire system includes a driver interface system (DIS), a front road wheel actuator system (FRWAS), a rear road wheel actuator system (RRWAS), and a controller for monitoring and implementing the preferred control strategy. The steering system operates normally in a steer-by-wire mode. In each of the EPAS mode and manual mode, the controller causes a clutch mechanism to engage, thus creating a mechanical linkage between the steerable member and the rack and pinion system while maintaining rear wheel assisted steering. In the EPAS mode, one of the front road wheel actuator or the reaction torque generator is available to assist in the steering operation along with rear wheel steering. Alternatively, in the manual mode, both the DIS and the FRWAS are deactivated and the vehicle is steerable through mechanical device along with the rear wheel assisted steering.

The invention provides a traffic safety auxiliary control method and a traffic safety auxiliary system and belongs to the field of automobile safety. The invention can detect the safe distance between an automobile with the system and an automobile in the front in real time, timely prompt a driver by voice, and control the automobile to operate in an forced manner if necessary; and in overtaking, the invention can calculate the overtaking safe distance in real time, prompts the driver to carry out overtaking or not, and controls the automobile to operate in the forced manner if necessary, so that the vehicle safety is greatly ensured. The traffic safety auxiliary system consists of a signal acquisition unit, a signal amplification and shaping unit, a processor unit and an actuator unit; the traffic safety auxiliary system is communicated with an anti-locked braking system, an electronic steering column lock, an electronic power-assisted steering system and an automobile body control system through a vehicle bus.

A reducer of an electronic power steering apparatus is disclosed. The reducer of an electronic power steering apparatus aids the operation of a steering wheel by the driver by preventing a clearance from being caused by frictional wear between a worm and a worm wheel, by reducing rattle noise caused by backlash, and by minimizing the change in the clearance due to a change in torque.

A command current setting portion has a target value corrector that calculates d-axis and q-axis current command values idc, iqc that are to be supplied to an open-loop controller, based on d-axis and q-axis current target values id*, iq*. When d-axis and q-axis voltage target value vd*, vq* calculated from the d-axis and q-axis current target values id*, iq* by the motor circuit equations exceed a voltage limit, this target value corrector 26 corrects the d-axis and q-axis current target values id*, iq* by the field weakening control such that d-axis and q-axis voltages vd, vq and d-axis and q-axis currents id, iq satisfy √(vd2+vq2)≦Vlim and √(id2+iq2)≦Ilim respectively. The d-axis and q-axis current command values idc, iqc are obtained by this correction.

The invention relates to an electronic power steering system with active aligning control function; the system is formed by additionally arranging a torque sensor, a steering wheel rotating angle sensor, a vehicle speed sensor, an electronic control unit, a power-assisted steering motor and a speed reduction mechanism on the traditional mechanical steering system; in the electronic power steeringsystem with active aligning control function, the rotating angle signal of the steering wheel, the torque signal of the torque sensor and the vehicle speed signal of the vehicle speed sensor are combined and are input to an active aligning control module of an electronic control unit, so as to judge whether the steering motor to be in an aligning state, if the steering motor is in the aligning state, the proper aligning control force moment can be calculated, and the corresponding force moment can be output by the motor. In the invention, the rotating angle signal, the torque signal and the vehicle speed signal are utilized to carry out aligning control, the invention is suitable for the electronic power steering system with various power-assisted modes, improves the aligning performance of the vehicle and does not affect the control handfeel of drivers.

The present invention comprises a steering system selectively operable in one of six modes: steer-by-wire with rear steering, steer-by-wire without rear steering, electronic power assist steering (EPAS) with rear steering, electronic power steering (EPAS) without rear steering, mechanical backup manual steering with rear steering, and mechanical backup manual steering without rear steering. The steer-by-wire system includes a driver interface system (DIS), a front road wheel actuator system (FRWAS), a rear road wheel actuator system (RRWAS), and a controller for monitoring and implementing the preferred control strategy. The steering system of the present invention operates normally in a steer-by-wire mode. In each of the EPAS mode and manual mode, the controller causes a clutch mechanism to engage, thus creating a mechanical linkage between the steerable member and the rack and pinion system while maintaining rear wheel assisted steering. In the EPAS mode, one of the front road wheel actuator or the reaction torque generator is available to assist in the steering operation along with rear wheel steering. Alternatively, in the manual mode, both the DIS and the FRWAS are deactivated and the vehicle is steerable through mechanical means along with the rear wheel assisted steering.

The invention discloses a low-speed self-adaptive cruise control system and a low-speed self-adaptive cruise control method. The low-speed self-adaptive cruise control system comprises an ultrasonic radar set, a central control module connected with the ultrasonic radar set as well as an electronic power-assisted steering system, a vehicle body electronic stabilization system, an engine management system, an automatic gearbox control unit, a human-computer interface module and a gradient sensor which are connected with the central control module. The central control module plans a running route of a vehicle according to obstacle information and information on rotation angles of a steering wheel, and judges whether or not the vehicle needs to be subjected to acceleration control or deceleration control. If the acceleration control is needed, the target torque is calculated and transmitted to the engine management system, and then the engine management system responds to torque control and controls the vehicle to accelerate; and if the deceleration control is needed, a target deceleration rate is calculated and transmitted to the vehicle body electronic stabilization system, and then the vehicle body electronic stabilization system outputs corresponding brake master cylinder pressure and controls brake discs to brake and decelerate. According to the low-speed self-adaptive cruise control system and the low-speed self-adaptive cruise control method, the low-speed (the vehicle speed is smaller than 5km / h) self-adaptive cruise of the vehicle can be realized.

The invention relates to a steering angle correcting method, an electric power steering system and a vehicle. The steering angle correcting method comprises the following steps of obtaining travellinginformation of the vehicle, wherein the travelling information is travelling parameter information and / or travelling image information; according to the travelling information, determining whether the vehicle is under an abnormal steering condition deviating from a travelling route; if yes, according to a current power assisting current of the vehicle, torque information of a current steering wheel, and current vehicle speed information, determining a target control signal, wherein the target control signal is used for controlling a power assisting motor to output a target power assisting torque to correct the deviation of the steering angle of the vehicle; and according to the target control signal, controlling the power assisting motor to output the target power assisting torque. Through the adoption of the steering angle correcting method disclosed by the invention, when the vehicle deviates from the travelling route, the power assisting motor can be controlled to output the targetpower assisting torque, so that the abnormal steering of the vehicle is effectively resisted, and the occurrence of accidents caused by that a driver does not correct the steering wheel in time is avoided.

There is provided a control system for an electronic power steering. The control system includes: a SAT estimating portion for estimating a self aligning torque (SAT) of a vehicle by inputting an angular velocity and an angular acceleration of a motor, a steering torque, and a current command value; and a motor current correction value calculating portion for deciding a running state of the vehicle based on a SAT estimation value estimated by the SAT estimating portion, a vehicle speed, and a steering angle, and correcting the current command value by calculating a motor current correction value based on the SAT estimation value in accordance with the running state. According to this configuration, an offset torque can be always corrected precisely irrespective of a road surface situation or a driving condition such as a straight line running, and thus a comfortable steering performance can be attained by lessening driver's fatigue.

A road vehicle steering system which is adapted to use measurements and estimates characterising the motion of and forces acting on the vehicle and the steering system such as to derive an estimate of steering system disturbance force and to then use the latter estimate to establish a torque demand for the vehicle electronic power steering (EPS) which substantially compensates for this disturbance force.

The invention relates to a full-automatic vehicle backing minor control method and a full-automatic vehicle backing minor control system. The full-automatic vehicle backing minor control system mainly comprises an image processing module, a radar probe, a CAN transmitting and receiving module and a master control module, wherein the image processing module identifies video signals acquired by a camera and outputs identity signals to the master control module; the radar probe is used for transmitting and receiving ultrasonic waves and outputs ultrasonic wave signals to the master control module; the CAN transmitting and receiving module is used for realizing real-time transmission of information between an engine control unit, a gear box control module, an electronic power-assisted steering unit and an electronic stability control unit; and the master control module is used for processing the signals from the image processing module and the radar probe, responding the signals in the interrupt mode, and maintaining connection with the CAN transmitting and receiving module. The full-automatic vehicle backing minor control method and the full-automatic vehicle backing minor control system solve the problem that a common vehicle backing minor control system can not precisely guide a driver to back a vehicle.

The invention discloses a redundant electronic steering system and control method of an autonomous vehicle. Two electronic power steering units are arranged, wherein each electronic power steering unit comprises a processor, a steering angle and torque sensor and a motor, wherein the steering angle and torque sensor and the motor are correspondingly connected with the processor; the steering angleand torque sensor is used for outputting a torque signal and an angle signal; the processor is also used for calculating a current total torque value K, needing to be output, of the whole system according to a current expected steering wheel steering angle signal, a torque signal and an angle signal and calculating a torque value needing to be output by the electronic power steering unit according to a distribution mechanism; and the processor is also used for controlling the motor correspondingly connected with the processor according to the torque value to control the vehicle to realize steering. According to the redundant electronic steering system and control method of the autonomous vehicle, full redundancy of the electronic steering system is realized, and safety requirements of automatic driving can be satisfied.

The invention provides a novel electronic power steering system testing platform and a testing method thereof. A steering wheel is installed on an input shaft; a servo motor I uses a reduction box and a synchronous belt to drive the input shaft to make rotation, thereby realizing two kinds of ways of servo loading and hand-operated loading. A torque sensor and an angle sensor are connected to the input shaft. An output terminal of a tested piece electronic power steering (EPS) system a is connected with a damping loading unit by a gear wheel and rack driving mechanism; and bidirectional data transmission among an input loading and detection device, the tested piece EPS system, and an upper computer control and signal processing system is carried out. The upper computer simulates a road condition; and the damping unit is controlled to simulate performance testing and steering hand-feeling testing with a damping moment. The damping loading unit is formed by combination of a magnetic powder brake and a servo motor; the magnetic powder brake outputs a large damping moment; and quick control of the small moment is realized based on characteristics of quick response and precise control of the servo motor. Therefore, precise and quick control of the damping torque of the testing platform is realized on the condition of cost consideration.

The invention discloses an EPS (Electronic Power Steering)-WLAN (Wireless Local Area Network) fusion system and a switching method based on a framework, and relates to the technical field of communication and a WLAN. The EPS-WLAN fusion system comprises a mobility management entity MME, a data gateway P-GW, a WLAN access gateway WAG and each wireless access point AP, wherein the gateway WAG is respectively connected with the mobility management entity MME and the data gateway P-GW through an S1-WM interface and an S5-WP interface. In the fusion system, when a dual-mode terminal is switched into the WLAN from an EPS system, the switching is based on business identification and occurs during service request. According to the fusion system and the switching method, an M2M business is switched into the WLAN, and therefore the load pressure of the EPS system access network is relieved, so that a system resource is more reasonably utilized, and the system performance is ensured.

The invention discloses a multifunctional driving monitoring early warning system based on a mobile terminal. According to the multifunctional driving monitoring early warning system, data are collected through four wide-angle cameras arranged on a front grating, a left side door mirror, a right side door mirror and a tail door of a vehicle respectively; then, the data are synthesized to form a complete image through the image processing technology; meanwhile, after electronic power-assisted steering data in an ECU of a vehicle and related working condition information of other vehicles are collected through an OBD2 port data collector which is connected to the ECU of the vehicle and comprises a main chip, namely, an eml327 chip, a 2.4 G module and other related circuits, the data are transmitted to a controller through the 2.4 G wireless technology; advancing trajectory prediction of the vehicle is calculated according to other data, including the axle base, the wheel tread and the like, of the vehicle; finally, the image where trajectory prediction is conducted is outputted to the mobile terminal device such as a mobile phone in a wireless mode, and the data are displayed through the mobile terminal device. According to the multifunctional driving monitoring early warning system, real-time image transmission and detection are achieved through a wireless communication method at a low cost.

The invention relates to a steering redundancy and integrated control system and method of a four-wheel independent driving electric automobile. The control method comprises the steps that a differential action power reference curve is determined by an automobile controller according to the steering wheel hand power demands of a driver; an electric power steering module obtains a power torque command according to the measured steering wheel rotating angle data and sends the power torque command to an EPS (Electronic Power Steering, electronic power steering system); a differential action powersteering module utilizes the differential action power reference curve to obtain a front axle differential action torque of the electric automobile according to the measured data; a reference yaw angle velocity is obtained according to the measured automobile practical yaw angle velocity, the steering wheel rotating angle and the automobile speed data, and accordingly the additive yawing moment is obtained; and the automobile controller utilizes the front axle differential action torque and the additive yawing moment to obtain a four-wheel driving motor target output torque. Compared with theprior art, the steering redundancy and integrated control system and method have the advantages that the individualized demands of the driver can be met, the driving safety of the automobile is improved, and the manipulation burden of the driver is relieved.

A road vehicle steering system which is adapted to use measurements and estimates characterising the motion of and forces acting on the vehicle and the steering system such as to derive an estimate of steering system disturbance force and to then use the latter estimate to establish a torque demand for the vehicle electronic power steering (EPS) which substantially compensates for this disturbance force.

The invention relates to a vehicle stability control system based on an active intervention steering system, which is characterized by at least comprising: an electronic assistance steering module used for receiving a torque request instruction from an electronic brake control module and outputting torque for intervening with the positions of a turning wheel and a steering wheel by torque; the electronic brake control module configured to determine the running state of a vehicle according to the hydraulic pressure applied by the driver through the brake pedal, the wheel working state input through wheel speed sensors, and the vehicle actual acceleration and yaw rate signals input by vehicle inertia sensors and calculate the stability deviation of the current vehicle control state from theideal control state and the turning wheel rotating angle required to compensate for the stability deviation according to the brake back pressure applied by the driver, and obtain the assist torque value to be provided for achieving the target turning wheel rotating angle and send the same to the electronic assistance steering module.

Disclosed is a torque angle sensor and an electronic power steering apparatus having the torque angle sensor, which includes an upper case, an upper side of which is assembled with a sensor housing, a rotor assembled with an inside of the upper case, the rotor fitted around an outer surface of the output shaft extending through the rotor and assembled with an inside of the upper case, a lower case, a lower side of which is assembled with a spacer cover, and a middle case assembled between the upper case and the lower case. The upper case includes holding parts opposed to each other and formed on an upper surface of the upper case, which is assembled with the sensor housing, and a seating spring protruding downward with inclination from an end of one of the holding parts and elastically bent when the upper case is assembled with the sensor housing. Therefore, it is possible to remove a circumferential clearance and an axial circumferential clearance during assembling of the torque angle sensor with peripheral elements and can absorb movement created by an impact, so as to effectively prevent breakage and mis-operation of the elements included in the torque angle sensor and facilitate the assembling of the electronic power steering apparatus.

The invention discloses a controller of an automotive electronic power steering (EPS) system, and belongs to the technical field of automotive parts. The controller is characterized in that: a power supply management module is connected with a microcontroller unit (MCU) module; a safety relay module is connected with the power supply management module; the safety relay module is connected with an H bridge driving module; the safety relay module is connected with an H bridge; the pulse width modulation (PWM) signal port of the MCU module is connected with the port of the H bridge driving module; the PWM signal port of the H bridge driving module is connected with the port of a field effect tube; the resistance port of the H bridge is connected with the port of a feedback current module; the output port of the feedback current module is connected with the active directory (AD) port of the MCU module; the output port of a torque sensor is connected with the AD port of the MCU module; and the output ports of a vehicle speed sensor and a revolving speed sensor are connected with the pulse signal port and the signal catching port of the MCU module. The controller has the advantages that: the operating performance is improved, the assisted power is changed together with vehicle speed, and the operating stability requirement of an automobile is met; and due to the EPS system, the requirements of the automobile for energy conservation and environment friendliness are met, and the power steering performance is greatly improved.

The embodiment of the invention provides an in-vehicle game interactive system and method. The in-vehicle game interactive system includes a control device, a game controller connected to the controldevice in a communication manner, an electromagnetic clutch controller, an electronic power-assisted steering system EPS, and an in-vehicle system; wherein the electromagnetic clutch controller is used for responding to a request sent by the game controller and realizing the clutch of the power transmission of the steering shaft in the electromagnetic clutch controller; and the EPS is used for establishing a communication connection with the game controller in response to a takeover request sent by the game controller when the steering shaft is separated from the control device. The virtual object displayed by the in-vehicle system is controlled in response to the control command sent by the game controller or the generated control command, so as to perform the in-vehicle game; therefore,the user is prevented from driving the vehicle during the in-vehicle game, and the safety of the user is improved. Meanwhile, the user can play the in-vehicle game through the control device, which creates a real control scene for the user and improves the game experience of the user.

A trailer reverse assist system for a vehicle coupled to a trailer is provided. The trailer reverse assist system includes a park assist controller configured to receive a distance input from at least one rear distance sensor. The park assist controller is configured to determine a pitch angle of the trailer relative to the vehicle based on the distance input. An electronic power steering system is coupled to the park assist controller. The electronic power steering system is configured to adjust a hand wheel angle of the vehicle based on the pitch angle of the trailer.

Disclosed is a torque angle sensor and an electronic power steering apparatus having the torque angle sensor, which includes an upper case, an upper side of which is assembled with a sensor housing, a rotor assembled with an inside of the upper case, the rotor fitted around an outer surface of the output shaft extending through the rotor and assembled with an inside of the upper case, a lower case, a lower side of which is assembled with a spacer cover, and a middle case assembled between the upper case and the lower case. The upper case includes holding parts opposed to each other and formed on an upper surface of the upper case, which is assembled with the sensor housing, and a seating spring protruding downward with inclination from an end of one of the holding parts and elastically bent when the upper case is assembled with the sensor housing. Therefore, it is possible to remove a circumferential clearance and an axial circumferential clearance during assembling of the torque angle sensor with peripheral elements and can absorb movement created by an impact, so as to effectively prevent breakage and mis-operation of the elements included in the torque angle sensor and facilitate the assembling of the electronic power steering apparatus.

In the event of failure in a first assist system or a second assist system, a failure assist amount computing unit (35) computes an assist amount (Tf) while decreasing a maximum assist amount (upper limit for failure) as a limit value for when a vehicle is stopped compared with a maximum assist amount as a limit value for when the vehicle is running. For example, when it is determined that a failure, such as disconnection or switching element seizure, is present in the first assist system or the second assist system on the basis of a result of determination by a failure determine function, an assist amount switching unit (36) supplies the assist amount (Tf) inputted from the failure assist amount computing unit (35) to a first motor drive control unit (37) and a second motor drive control unit (38). When the failure is present in the second assist system, the drive control unit (37) drives an EPS motor (15) in accordance with the assist amount (Tf). When the failure is present in the first assist system, the drive control unit (38) drives the EPS motor (15) in accordance with the assist amount (Tf).

The invention discloses a redundant electronic steering braking system which comprises two electronic power-assisted steering units, a main braking unit and a slave braking unit. The two electronic power-assisted steering units are used for jointly controlling an automobile to steer. The main braking unit is used for receiving a control command from an automobile bus, calculating the control command and executing result output. The slave braking unit is used for receiving the control command from the automobile bus, calculating the control command and deciding whether result output is executedor not on the basis of a state signal of the main braking unit. The redundant electronic steering braking system can meet the requirement for automatic driving safety.

Methods and apparatus are provided for reducing steering wheel vibrations in electronic power steering systems. The apparatus includes a processor and performs a method that estimates an average angular wheel speed of at least one wheel of the vehicle; determines an average wheel angle from the average angular wheel speed; generates sine and cosine functions of the average angular wheel angle; processes the sine and cosine functions with a steering wheel torque signal received from a torque sensor to extract amplitude components of at least one of the sine and cosine functions; reconstructs the sine and cosine functions using the steering wheel torque signal; combines the sine and cosine functions to provide a control signal, and controls the EPS system via the control signal to attenuate smooth road shake vibrations in a steering wheel of the vehicle.

The invention provides an electronic control network of an automobile, which relates to an improvement of the conventional electronic control network of an automobile, is more accurate and is capable of solving network conflict and time delay of a vehicle-mounted CAN (Controller Area Network) bus. The electronic control network is designed with three electronic control units (ECUs) of the automobile, namely, an anti-locking brake system (ABS), an electronic power-assisted steering (EPS) unit and an automobile body control unit, and the ECUs form high, medium and low speed nodes of the CAN bus so as to form a control network; and the core of the electronic control network is a software module which is mainly composed of a system initializing module, a start self-checking module, a main control module, a data acquisition module, a data processing module, a reference automobile speed calculating module, a road surface identifying module, an automobile movement state identifying module, a control decision and execution mechanism acting module, a failure diagnosing module and a communication module, and the modules are uniformly dispatched in real time and distributed with operation time by the main control module according to a task management mechanism and exchange data and signals with one another.