52results about How to "Improve driving quality" patented technology

The invention relates to the technical field of radio fix, in particular to a millimetre wave time-division random code phase modulation multi-passage automobile anti-collision radar. The radar of the invention is provided with a time-division and time-sequence asynchronous control to receive/emit signal, and a receive/emit a dual-purpose quasi-light integrated medium lens antenna array, and scans the objects possible to be collided on the warning road surfaces by DSP according to lane scanning wave beam; the road situation photographing, the vehicle speed sensing and satellite positioning GPS data MCU control time-division n-passage random code millimetre wave phase modulation; emission is carried out sequentially by upper frequency conversion, R/T3, frequency doubling and power amplification, R/T2, a circulator, a wave beam switch and the antenna array; echo passes through the antenna array, the wave beam switch, the circulator, the R/T1, low noise high amplifier, subharmonic mixing, middle amplifier and extracts the multi-passage signal DSP which is processed and controlled by MCU; the driving of multi-automobile of adjacent lanes is not disturbed by each other and can be completed simultaneously; the high-performance environment electromagnetic compatible EMC is provided; when a plurality of road barriers are encountered, the orientation, distance and relative speed are determined by DSP restriction virtual warning; three-dimensional panoramic images are displayed by a CRT; the closer the distance of the object is, the higher the resolution is; the object which is closest to the vehicle is recognized; sound and light alarm are carried out when the distance is less than safety distance; when the distance is near to the dangerous distance, the vehicle can intelligently avoid the barrier or reduce the speed or brake; the radar of the invention can make a choice according to the control reference road situation, the vehicle speed and the GPS data.

The invention relates to the technical field of radio positioning, in particular to a millimeter-wave random biphase code phase-modulation and amplitude-modulation automotive collision-proof radar. Aquasi-optical integrated dielectric lens antenna and an array are arranged; a DSP scans wave beams lane by lane to guard against a target possible collided on a road surface; a broadband noise sourcegenerates two random code generators, a random code generator A modulates phase and measures distance/speed, and a random code generator B modulates amplitude, and performs transmitting/receiving conversion and back edge detection; double random code radio frequency is transmitted through an upconverter, an R/T3, a frequency multiplier and power amplifier, an R/T2, an isolator and an antenna; andback waves are transmitted to the DSP and an MCU for processing control through the antenna array, a beam switch, an isolator, an R/T1, a high frequency amplifier, a downconverter, an intermediate frequency amplifier, a random sequence asynchronous gate, a digital intermediate frequency quadrature detector I/Q and a digital pulse compression correlator. The radar ensures traffic flows in adjacentlanes run densely without mutual interference and operate in a coexisting way, has high electromagnetic compatibility EMC, inhibits false-alarm and determines the position, distance and relative speedof a target through the DSP, displays three-dimensional images and identifies a target closest to the automobile through a CRT, performs the audible and visual alarm if the distance of the target issmaller than a safety distance, intelligently avoids a barrier or reduces speed or brakes if the distance of the target is approximate to a danger distance, and controls and references a road condition to combine the speed of the automobile and the current position information on a GPS to make a choice, thereby obviously improving the running safety of the automobile.

The invention discloses a PWM method for an electric vehicle motor inverter. The method comprises the steps of performing PWM on the inverter by an NZPWM method, and reasonably arranging a reference voltage vector synthesis sequence and a PWM pulse action mode of each section; correcting a three-phase modulation wave generated by NZPWM to obtain an inverter boundary modulation ratio parameter, andrespectively executing NZPWM and SVPWM according to the modulation ratio parameter; performing over-modulation on the inverter by a discrete PWM method after a voltage vector enters an over-modulation region from a linear modulation region, dividing the over-modulation region into two regions, and setting a modulation ratio of lower boundaries of the two regions; and executing discrete PWM of thetwo over-modulation regions according to the modulation ratio to obtain an expected PWM waveform. By the method, the common-mode voltage output amplitude at zero vector is effectively reduced, motorshaft current amplitude is suppressed, the service lifetime of a motor bearing is prolonged, the vibration and the noise output of a motor inversion system are reduced, and the driving quality of thewhole vehicle is improved.

A system and method of applying a coast regeneration torque of a vehicle are provided. The method corrects a magnitude of slip (or a slip ratio) which is considered when a coast regeneration torque is to be variably controlled while the vehicle is coasting.

The invention relates to an online determination method for drive torque required by a driver and belongs to the technical field of calibration of the drive torque required by a whole vehicle. The method comprises the steps of determining a traveling resistance curve and the largest drive force curve, determining the request curve of drive force required by the wheel end and the highest vehicle speed when an acceleration pedal is 100%, designing an insensitive area and a sensitive area of the acceleration pedal, determining the complete map matrix table of drive force required by the driver ofthe wheel end online, and calculating the required drive torque of the driver to the output end of an engine. The described online determination method for the drive torque required by the driver issimple and practical, calibration of an off-line driver required drive toque map table is not needed, and the development time and cost of the whole vehicle are shortened and reduced. According to themethod, by planning the sensitive area and the insensitive area of the pedal online, acceleration/reduction and vehicle speed easy control performance of a car in various traveling environments is ensured, and the driving quality of the car is effectively improved.

A vibrating film 47 is supported by a cylindrical body frame 31, and a first driving unit 61 for driving the vibrating film 47 based on an applied voice signal, is disposed in the body frame 31 on one surface side of the vibrating film 47, and a second driving unit 75 for driving the vibrating film 47 in the same direction as a vibrating direction of the vibrating film 47 driven by the first driving unit 61 based on the applied voice signal, is disposed in the body frame 31 on the other surface side of the vibrating film 47.

The invention belongs to the technical field of internet of things, and relates to an intelligent license plate and a vehicle management and control system and method. Existing vehicles cannot be effectively monitored during driving, thereby easily causing various accidents and crimes. The intelligent license plate disclosed by the invention comprises a license plate body, and a control module anda communication module, a camera module, a storage module and an ETC module connected with the control module are arranged in the license plate body, wherein the control module is used for logicallymanaging the communication module, the camera module, the storage module, and the ETC module to perform logic management and orderly work; and according to the vehicle management system and method disclosed by the invention, a traffic control center downloads violation information through a cloud computing center and the violation information is transmitted to vehicle owners wirelessly. By adopting the intelligent license plate and the vehicle management and control system and method, driving vehicles can be effectively managed and controlled and driving tracks are queried, and therefore, thetraffic control department can grasp dynamic situations of each vehicle at any time to avoid, monitor or restore various vehicle violations and illegal crimes.

The invention discloses a vehicle control method and device, a storage medium, a control system and a vehicle. The vehicle comprises a first motor used for driving two front wheels of the vehicle, a second motor used for driving a first rear wheel of the vehicle, and a third motor used for driving a second rear wheel of the vehicle. The control method comprises the steps that the accelerator pedalopening degree, the vehicle speed, the steering wheel rotating angle, the driving mode and the drive mode of the vehicle are obtained; request torques of the first motor, the second motor and the third motor are calculated correspondingly according to the accelerator pedal opening degree, the vehicle speed, the steering wheel angle, the driving mode and the drive mode; the motors are controlled according to the request torques, and the actual torques of the motors are obtained; and the torque and the drive mode is checked according to the actual torque and the request torque, and the vehicleis controlled to run normally when checking is passed. According to the control method of the vehicle, power output of the vehicle in the driving process can be more uniform, the comfort and dynamic property of the vehicle are guaranteed, and the driving texture of the vehicle is improved.

The invention relates to an accelerator pedal torque request calibration method, belonging to the technical field of vehicle torque demand calibration. Firstly, determining a driving force and runningresistance curve of an automobile according to the basic parameters of the automobile; then determining a driving force request curve of the wheel end in 100% accelerator pedal; calculating the driving force request curve of the wheel end in partial accelerator opening; and finally, converting the driving force request of the accelerator pedal at the wheel end to a crankshaft end of the engine, so as to obtain a map of the accelerator pedal required torque required to be output by the engine under a plurality of gear positions. The accelerator pedal torque request calibration method disclosedby the invention is novel and practical, and can reduce the shift impact; and the controllability to the automobile speed of the driver is achieved by forming an accelerator pedal insensitive area near the running resistance curve of the automobile; therefore, the driving quality of the automobile is effectively improved.

The invention discloses a hybrid vehicle clutch control method which comprises the following steps: when a vehicle is in a non-parallel driving mode, calculating equivalent energy consumption of the vehicle in each driving mode, and if the equivalent energy consumption of the parallel driving mode is smaller than that of other modes, requesting to enter the parallel driving mode; when the vehiclemeets the condition of entering the parallel driving mode, sending an instruction of entering the parallel driving mode by the hybrid power control unit; taking the rotating speed from the driving motor to the clutch driven end as a target rotating speed, controlling the generator to adjust the engine rotating speed to enable the target rotating speed from the engine to the clutch driving end to meet requirements; when the clutch control condition is met, controlling the current of the electromagnetic valve to execute the clutch combination action; and when the vehicle runs in the parallel driving mode, calculating equivalent energy consumption of the vehicle in the three modes in real time, requesting to quit the parallel driving mode when the equivalent energy consumption of the paralleldriving mode is greater than the equivalent energy consumption of the other modes, and controlling the current of the electromagnetic valve so as to enable the clutch to finish separation.

The invention discloses an automobile accelerator characteristic design method and system and a storage medium. The method comprises the following steps that a current accelerator opening degree of anautomobile and a corresponding current automobile acceleration are obtained, and an accelerator opening degree-acceleration relation is established; an acceleration-traction force relation is established according to the current automobile acceleration, and an accelerator opening degree-traction force relation is established according to the acceleration-traction force relation and the accelerator opening degree-acceleration relation; a traction force-rotating speed torque relation between current automobile traction force and engine rotating speed and the engine torque is established; and according to the accelerator opening degree-acceleration relation, the acceleration-traction force relation and the traction force-rotating speed torque relation, a relation between the engine rotatingspeed and the engine torque is obtained when the acceleration before and after automobile gear shifting is not changed. The automobile accelerator characteristics are calculated and analyzed to obtainthe relation between the engine rotating speed and the torque when the acceleration before and after automobile gear shifting is not changed, and the automobile driving quality can be improved conveniently.

The invention relates to an accelerator pedal torque calculation method and device and an automobile. The method comprises the steps of firstly, obtaining different accelerator pedal opening degrees, sequentially sorting the accelerator pedal opening degrees from small to large, and calculating expected accelerations at different automobile speeds when the accelerator pedal opening degrees are 0% in combination with sliding energy recovery torque and road resistance; based on the expected acceleration when the opening degree of the accelerator pedal is 0% and the acceleration change rate, the expected acceleration under the rest of the opening degrees of the accelerator pedal is calculated, and finally based on the expected acceleration under the different opening degrees of the accelerator pedal and the different vehicle speeds and the road resistance under the different vehicle speeds, the accelerator pedal torque under different accelerator pedal opening degrees and different vehicle speeds is calculated. According to the method, problems of poor driving feeling and poor drivability of the vehicle due to the fact that the vehicle driving irregularity and the torque change cannot follow up the acceleration intention expected by the driver due to the irregularity of the torque in the related technology can be solved.

The invention discloses a new energy automobile accelerator pedal torque calculation method and system and a readable storage medium. The calculation method comprises the following steps: obtaining the opening degree of an accelerator pedal; obtaining the maximum torque from the power system at different vehicle speeds to the wheel edge when the opening degree of the accelerator pedal is 100%, and obtaining the maximum torque from the power system at different vehicle speeds to the wheel edge when the opening degree of the accelerator pedal is 0%; and according to the maximum torque from the power system of different vehicle speeds to the wheel edge when the accelerator pedal opening degree is 100% and the maximum torque from the power system of different vehicle speeds to the wheel edge when the accelerator pedal opening degree is 0%, obtaining the torque from the power system to the wheel side at different accelerator pedal opening degrees and different vehicle speeds between 0% and 100%. According to the new energy automobile accelerator pedal torque calculation method, the sliding energy recovery torque is fused into the accelerator pedal torque, the defect that a conventional torque recognition method is poor in responsiveness is overcome, the response continuity of the accelerator pedal torque is improved, the driving intention is better recognized, and the driving quality of an automobile is improved.

The invention discloses a steering control mechanism of a driverless automobile and relates to the technical field of driverless automobiles. The steering control mechanism of the driverless automobile comprises a box body; a power box and a first bearing seat are mounted at the top of the inner wall of the box body sequentially from left to right; and a direction shaft matched with the first bearing seat is mounted inside the first bearing seat, and the end, away from the first bearing seat, of the direction shaft penetrates through the box body and extends to the position below the box body.According to the steering control mechanism of the driverless automobile, by arranging an electromagnet, a permanent magnet and a rotating rod, in the driverless process of the driverless automobile,a first gear is disengaged from a second gear, thus rotating of the direction shaft is not affected by rotating of the rotating rod, so that driving safety in the driverless process is improved effectively, it is convenient for people to use the driverless automobile, and the performance of the driverless automobile is improved effectively.