213results about How to "Meet drive requirements" patented technology

The invention relates to a drive control system of double motors of a rear axle of an electric automobile. To the closed-loop control of the average speed of double motors in the control system, a single driving wheel adopts a method of given torque control and speed follow-up to carry out the closed-loop control of the average speed of double motors, so that the automobile can run according to the target automobile speed of a driver, the rotational speeds of double motors are also permitted to be inconsistent under the condition of different loads, and the self-adapting differential performance of the turning of the low-speed running of the electric automobile is realized. By designing in this way, the differential control requirement of the curve running of a low-speed electric automobile is met, the use of a complicated electronic differential algorithm is avoided, and the cost of the system is lowered. By utilizing the self-adapting differential performance during turning, the torque distribution of double motors is further regulated according to the difference of the rotational speeds of double motors, the power-assisted steering of the curve running of the automobile is realized, the energy loss is decreased, and the effect of energy saving is achieved.

The invention discloses a torque management control method of a battery electric vehicle. Due to the fact that a vehicle control unit receives all status signals transmitted by a gear shifting mechanism, an accelerator pedal, a brake pedal, a motor controller and a battery controller, target demand torque of a vehicle is determined, a series of processing is performed on the target demand torque, the target demand torque subjected to the processing is output to the motor controller to control operation of a motor, and accordingly, the battery electric vehicle can meet all travel requirements.

The invention relates to a double-layer V-shaped built-in permanent magnet motor rotor for an electric automobile. Multiple groups of permanent magnet slots which are radially arranged in an inner layer and an outer layer are uniformly arranged on the iron core of the rotor at intervals along the circumferential direction; one or more V-shaped magnetized stripy magnetic steel is embedded in each permanent magnet slot. By virtue of the optimization of structures such as the angle of polar arc of inner-layer V-shaped magnetic steel, the included angle of outer-layer V-shaped magnetic steel, the width proportion of the inner-layer magnetic steel to the outer-layer V-shaped magnetic steel and the included angle of the outer-layer forcipated permanent magnet slot and the outer-layer magnetic steel, the air-gap flux density waveform is more approximate to the sinusoidal distribution, the harmonic component is reduced, the air-gap field waveform of the motor is improved, the fundamental wave frequency of spline torque fluctuation is improved, the spline fundamental wave and the ultraharmonics torque amplitude value are reduced, the torque fluctuation caused by splines is reduced, and the synthesis torque fluctuation of the motor is greatly reduced; and meanwhile, the reluctance torque is obviously increased, the salient pole rate and flux weakening speed expanding capability of the motor are improved, a constant-power speed range wider than that of a surface-mounted permanent magnet motor can be obtained, and the driving requirement of electric and hybrid automobiles can be met.

The invention involves a electric motor drive system with the capacity to adapting to the speed and its controlling method. The system includes a electric motor drive system controller, the first electric motor, the first electric motor controller, the second electric motor, the second electric motor controller. It is characterized by: the first and the second electric motors both have output axis of their two ends, a output axis of the first electric motor is connected with a output axis of the second electric motor through at least one speed reducer; the electric motor drive system controller is linked with the first electric motor controller and the second electric motor controller through signal cables respectively, the first electric motor controller is connected with the first electric motor through power cables, and the second electric motor controller is connected with the second electric motor through power cables. Its advantages are: it can change the mode of drive system automatically according to the vehicle's speed, power, traction demand and the driving conditions to meeting the driving demands such as climbing in low-speed, running in middle or high speed, braking, reversing and so on, thus it adapts various operating conditions automatically. The drive system can be used in pure electric vehicles, fuel cell electric vehicles and hybrid power electric vehicles and other various vehicles driven by electric motor.

An embodiment of the invention provides an array substrate and a manufacturing method thereof, and a display apparatus and relates to the display technology field. Stability of a thin film transistor in a pixel unit can be guaranteed and the size of the thin film transistor in a grid driving circuit can be reduced so as to realize a narrow frame design. The array substrate comprises the pixel unit and the grid driving circuit. The pixel unit comprises a first film transistor. The grid driving circuit comprises a second film transistor. An active layer of the first film transistor comprises a first metal oxide pattern and a second metal oxide pattern which are stacked. An active layer of the second film transistor is a third metal oxide pattern. Optical stability of the second metal oxide pattern is greater than optical stability of the first metal oxide pattern. Carrier mobilities of the first metal oxide pattern and the third metal oxide pattern are greater than a carrier mobility of the second metal oxide pattern. The display apparatus is used for the array substrate comprising the grid driving circuit and the pixel unit.

The invention discloses a field maintenance method for CRTSII slab-track track boards. According to the method, steel bars embedment and anchoring are carried out on complete track boards on two sides of each damaged track board, and therefore the internal force on the complete track boards on the two sides remains unchanged in the maintenance process; then, maintenances like unlocking, repairing, tensioning and resetting are carried out on the damaged track boards or/and positions between the damaged track boards, anchoring, unlocking, repairing and tensioning on the longitudinally-connected track boards can be completed within skylight time, and therefore the repaired track boards can meet demands of high-speed railway train operation.

The invention discloses a method for estimating the SOC (State Of Charge) of a lithium battery of a low-velocity electronic vehicle. The method comprises the following specific steps of: (1) when the low-velocity electronic vehicle is electrified, performing rated capacity calculation on the lithium battery so as to ensure that the reference rated capacity of SOC is calculated and the SOC is accurate after the capacity of the lithium battery is attenuated, wherein a rated capacity estimation equation is as follows: Q rated=Q initial*K*SOH; and (2) performing SOC calculation, namely, performing SOC estimation, wherein an SOC estimation equation for SOC estimation is as shown in the specification in the charge and discharge process when an ampere-hour integral method is implemented. By adopting the method, an open circuit voltage method, the ampere-hour integral method and various modification compensation algorithms are respectively combined under different conditions to meet requirements of the low-speed electronic vehicle on battery SOC estimation precision in complex and variable working environments. Practical verification of the method shows that the precision can be up to 5%, and driving requirements of the low-speed electronic vehicle can be very well met.

The invention relates to a double planetary gear train multi-mode hybrid power system which comprises an engine assembly (300), an integrated starting power generator (19), a main driving motor (14), a first planetary gear train assembly (200) and a second planetary gear train assembly (100). The engine assembly (300) comprises an engine (301), the first planetary gear train assembly (200) comprises a first gear ring (203), a first planet carrier (204) and a first sun gear (205), and a clutch (16) is arranged between the first planetary gear train assembly (200) and the second planetary gear train assembly (100); and an output shaft of the engine (301) is connected with the first planet carrier (204), the integrated starting power generator (19) is connected with the first sun gear (205), and the first gear ring (203) is arranged to be an output end. The invention further relates to a control method based on the double planetary gear train multi-mode hybrid power system and comprises a control method of eight working modes. By means of the double planetary gear train multi-mode hybrid power system and the control method, it is guaranteed that the engine works in the best fuel oil economic zone, and the overall vehicle comprehensive efficiency is at the high level.

An embodiment of the invention provides an electric vehicle and a driving system thereof, and is applied to the field of electric vehicles. The electric vehicle comprises a mechanical system, an electric system and a driving mode selection unit. The driving mode selection unit is used for switching between a dual-motor independent-drive travelling mode and an auxiliary-motor coupling-drive travelling mode. The driving mode selection unit comprises the dual-motor independent-drive travelling mode, the auxiliary-motor coupling-drive travelling mode and a vehicle control unit. The dual-motor independent-drive travelling mode is adopted when the travelling power of rear drive wheels on two sides is smaller than or equal to the highest power of motors on one side, and the auxiliary-motor coupling-drive travelling mode is adopted when the travelling power of the rear drive wheels on two sides is larger than the highest power of the motors on one side. The vehicle control unit is used for controlling corresponding different electromagnetic clutches and electromagnetic-clutch frictional-disk locking devices in the dual-motor independent-drive travelling mode and in the auxiliary-motor coupling-drive travelling mode respectively.

The invention discloses an extended-range electric vehicle driving mileage calculating and displaying system. The extended-range electric vehicle driving mileage calculating and displaying system comprises a signal collecting and processing module, a calculating module and a displaying module, wherein the signal collecting and processing module is used for collecting and processing signals transmitted by a sensor, an electric auxiliary machinery, a vehicle controller and a battery management system BMS in real time; the calculating module is used for calculating driving mileage, economical speed and maximum driving mileage; and the displaying module is used for displaying the driving mileage, the economical speed and the maximum driving mileage which are calculated by the calculating module. The extended-range electric vehicle driving mileage calculating and displaying system has the advantages that the economical speed and the maximum driving mileage are calculated and displayed according to the most efficient power generation power of a range extender and vehicle parameters; meanwhile, the driving mileage capable of satisfying driving requirements of a driver is calculated and displayed on the basis of driver desired electric quantity, battery remaining capacity and remaining fuel quantity.

A power switch tube isolated gate drive circuit for a power converter comprises a pulse width modulation driver, an isolation driving transformer T, a blocking capacitor Cb, a capacitor C1, a diode D and a driven switch tube Q which constitute an isolated gate drive circuit in the prior art. According to the invention, on the basis of the above circuit, a resistor R1 in parallel with the capacitor C1 is additionally installed; a capacitor C2 is additionally installed to be in parallel connection with a resistor R2 and connected to a cathode of the diode D; after the capacitor C2 and the resistor R2 are in parallel connection, the other end of the capacitor C2 is connected between the capacitor C1 and a grid electrode of the driven switch tube Q. The capacitor C2, the resistor R2 and the diode D form a negative voltage source to provide a stable negative voltage in turn-off of the switch tube Q. Accidental switch-on of the switch tube in the switch-off process because of various crosstalks is prevented, and the reliability of the system is raised.

The invention belongs to a method and a device for welding antirust conductive metals on railway steel rail surfaces; wherein, the method includes the steps of rust moving, preheating, welding and slow cooling; the device comprises a vehicle body, a heating device, a swinging welding device and a slow cooling device. The invention can put an end to the misreport problem of a signal system owing to the rust grown on the rail surfaces to lead a signal interlocking system to obtain the reliable information; the device used in the method can effectively weld the antirust conductive metals on the railway steel rail surfaces and has the advantages of simple structure, fast construction speed and good application effect without affecting the inner quality of the steel rails.

The invention discloses a car rim and a spinning process thereof, aiming to overcome defects that existing car rims are heavy, have high driving resistance and are easy to deform due to low strength. The car rim comprises an outer tire bead, an inner tire bead, a bottom groove, an outer rim and an inner rim, wherein the bottom groove is arranged between the inner tire bead and the outer tire bead, the outer rim is connected to the end of the outer tire bead, and the inner rim is connected to the end of the inner tire bead. An outer spinning area and an inner spinning area are respectively arranged on the outer tire bead and the inner tire bead; the outer spinning area extends from the junction of the outer tire bead and the outer rim to the junction of the outer tire bead and the bottom groove, and the inner spinning area extends from the junction of the inner tire bead and the inner rim to the junction of the inner tire bead and the bottom groove. The weight of the rim, the driving resistance and oil consumption are reduced, and the car rim with high strength is not easy to deform. .

The present invention is a combination of oil and gas piston spring, including Piston Rings , Cover, bearing cap, ring-group throttle and adjustment ring gasket. Bearing cap with the thread through the rod attached to the throttle-group and the adjustment for gasket sets in the back end of the Detroit Piston Ring Cover and connected through the thread. The invention of on the basis the original oil and gas in the spring can change resistance in order to achieve different requirements of the traffic movement. In the absence of the destruction of the cylinder seal, this enables oil and gas spring by the substantial increase in common. Attenuation of the invention can be used body vibration, enhancing vehicle safety, ride comfort and off-road speed.

The invention relates to the field of automobiles and discloses an automobile hybrid power coupling system and a control method thereof. According to the coupling system, power on an engine is transferred to a generator by adopting a mode of a first planetary gear, and a first brake is arranged on the first planetary gear, so that the structure of the coupling system is compact and the space is saved; power modes can be switched by virtue of connection or disconnection of the first brake and the first planetary gear; and when the first brake and the first planetary gear are disconnected, speed ratio adjustment of each rotating element in the planetary gear can be realized, the speed ratio between the engine and a motor is adjustable, and the speed ratio adjustment range is relatively large, so that the requirements of power performance and economical performance are met simultaneously. According to the control method, switching of different power modes is controlled by judging the residual electric quantity value of a battery and the automobile speed, so that running requirements under different working conditions are met, and excellent power performance and economical performance can be obtained simultaneously.

The present invention provides an evaluation method and apparatus for a reinforcing bracket of an automobile. The method comprises: determining an initial stress of the reinforcing bracket after a stamping process; according to a load condition under a limited condition and a structure of the reinforcing bracket, determining a force-receiving result of the reinforcing bracket under the load condition; according to the load condition and the structure of a bearing part born by the reinforcing bracket, determining the gravity of the bearing part and a force-receiving result of the bearing part under the load condition; according to the initial stress of the reinforcing bracket, the force-receiving result of the reinforcing bracket under the load condition, the gravity of the bearing part and the force-receiving result of the bearing part under the load condition, performing finite element analysis on the reinforcing bracket, and obtaining the maximum strength of the reinforcing bracket under the load condition; and judging whether the maximum strength is greater than the yield strength of the reinforcing bracket or not, and if not, judging that the structure of the reinforcing bracket meets the requirements of the automobile. By using the evaluation method and apparatus for the reinforcing bracket of the automobile, the design cost of the reinforcing bracket is effectively reduced and the development cycle is shortened.

The invention relates to an energy-saving method of an electric vehicle. According to the electric vehicle, an electromagnetic clutch is adopted, and the reverse transmission of moment can be realized. The energy-saving method of the electric vehicle comprises the following steps: a state judging step, judging the running state of the electric vehicle and judging the working state of the clutch according to the condition whether the electric vehicle is at a gliding state or not; and a braking energy recovering control step; the energy-saving method of the electric vehicle is characterized in that the state judging step comprises the steps of determining a travel signal br of a brake pedal, determining a travel signal th of an acceleration pedal, determining the rotating speed n of a motor, determining a battery SOC and the temperature t of the battery and determining an anti-skid brake system (ABS) working signal; and the braking energy recovering control step comprises the steps of controlling the clutch when the vehicle is braked and controlling the motor.

The invention discloses a monolithic track bed track structure capable of being rapidly assembled. The monolithic track bed track structure capable of being rapidly assembled comprises a track plate and steel rails erected on the track plate through fasteners, wherein the track plate is fixedly arranged on a foundation below the line through supports. Compared with the prior art, the supports arranged between the foundation below the line and the track plate can effectively support the track plate, rapid installation and locating of the track plate can be achieved, the purpose that the requirement for traveling of trains can be immediately met after installation is accomplished is achieved, and the monolithic track bed track structure has the advantages of being high in efficiency and accuracy, convenient to construct, and capable of being well applied to the situation that on the premise that traveling is not interrupted, maintenance or replacement of a monolithic track bed can be carried out within the skylight time.

The present invention discloses an electric locomotive driver display unit. The unit comprises a RS485 communication interface (3), a 110 V power supply module (4), a locomotive displaying and processing unit (12), a resistance type touch screen (11) and a locomotive displaying unit man-machine interface (7), wherein the displaying contents of the locomotive displaying unit man-machine interface (LCD) (7) comprise: a locomotive running interface set (5), a locomotive maintenance interface set (9), a failure diagnosis and alarm (6), a test interface (9) and program update and failure download (8). According to the present invention, the labVIEW programming is adopted on the embedded XPE operating system, the split screen and classification display is adopted, such that the locomotive driver can find the required data by the rapid browse manner; the split screen request of data transmission is adopted, only the data requested by the current screen is transmitted, the amount of the data is less, the data delay is less, the driving requirements of the locomotive driver can be met.

The invention provides a mobile production system capable of demolishing buildings selectively on site and recycling construction waste. The mobile production system is characterized in that on a building demolition site, after a building is selectively demolished, construction waste is processed into raw materials which can be made into environment-friendly construction material like recycled aggregate by using mobile site screening and crushing equipment, and then the material is manufactured into environment-friendly construction material by mobile site production equipment, like recycled aggregate environment-friendly bricks, recycled aggregate concrete, recycled aggregate dry powder mortar and recycled aggregate filling, so that the process of transporting construction waste out of the construction site is avoided, and zero emission of construction waste is realized.

The invention aims at providing a hydro-pneumatic spring comprising a connecting body, a damping valve, an adjustable pad, an oil cylinder, a main piston, an oil cylinder connector, a guide sleeve, a sealing cover, a lower pin plug, an inflation valve, an air chamber sleeve, an air cylinder, a floating piston, a blocking valve, a small piston, a locking connector and a knuckle bearing. The hydro-pneumatic spring can not only meet the requirement for driving on a smooth road surface, but also meet the requirement for the operation stability index of a vehicle under a bumpy road condition, so that the driving comfort and off-road maneuvering capability are effectively improved.

The invention relates to a combined type piston of a telescopic shock absorber, comprising a piston rod assembly, a piston assembly and a bottom valve assembly, wherein the bottom valve assembly of the shock absorber is pressed on a piston cylinder, and a compensating valve spring, a compensating valve plate, a bottom valve seat, a safety valve spring seat, a safety valve spring and a bottom valve tightening nut are sheathed on a bottom valve bolt. The bottom valve tightening nut is connected with a screw by a screw thread, and the compensating valve spring, the compensating valve plate, the bottom valve seat, the safety valve seat and the safety valve spring are compressed; simultaneously, oil passing holes facilitating the piston to take the choking effect under the low-speed condition are processed on in the circumferential direction, and oil through holes used for quickly unloading under the piston high-speed condition are processed on the bottom valve seat in the central position. The invention has the beneficial effects that the body vibration, in particular the pitching vibration can be effectively attenuated and the safety, the smoothness as well as the cross-country speed are increased.

The invention provides a vehicle control unit based on a torque model. The vehicle control unit comprises a torque requirement determination unit, an engine loss torque determination unit, an engine efficiency loss determination unit, an air throttle model selection unit, an air model selection unit, an air-fuel ratio model selection unit and an ignition advance angle determination unit. In addition, the vehicle control unit further comprises a matching calibration unit. According to the vehicle control unit based on the torque model, control on an engine torque can be realized based on an established model, and the driving requirement of a vehicle can be met.