696results about How to "Improve ride comfort" patented technology

The invention discloses a vehicle body control device, comprising a position detection module, an identification module and a vehicle body control module, wherein the position detection module is used for detecting seat positional information of each passenger in a vehicle; the identification module is used for acquiring identification information of the passenger at each seat position; the vehicle body control module matches the identification module and the positional information, acquires vehicle usage habit information of each passenger according to the identification information of each passenger, and controls electrical load of the vehicle respectively according to the vehicle usage habit information of each passenger and the corresponding positional information. The vehicle body control device can provide personal services for each passenger in the vehicle, meeting the requirement of each passenger for riding comfort. The invention also discloses a vehicle body control system and a vehicle, as well as a control method of the vehicle body control device.

The invention relates to an auxiliary spring work load checking method of a non end part contact type end part strengthened few-leaf main and auxiliary springs belonging to the suspension steel plate spring technical field. According to the method of the invention, firstly, according to the structure size and the elastic modulus of each end part strengthened few-leaf cross-section variable main spring, the end point deformation coefficient Gx-Ei and the half rigidity KMi of each main spring, and the deformation coefficient Gx-BC at the contact point of the Nth main spring and an auxiliary spring on a parabolic segment can be determined; then, according to the half rigidity KMi of each main spring, the thickness h2 of a root straight section, the Gx-BC of the Nth main spring and a main and auxiliary spring interval Delta design value, the auxiliary spring work load of the non end part contact type end part strengthened few-leaf cross-section variable main and auxiliary springs is checked. Through the emulation proof, in adoption of the method of the invention, the accurate and reliable auxiliary spring work load checking value can be obtained; therefore, the design levels and performances of the few-leaf cross-section variable main and auxiliary springs and the smoothness of a vehicle are improved; moreover, the design and test cost is saved; and the product development speed is accelerated.

The invention belongs to an automotive transmission and in particular discloses a double-clutch automatic transmission shift control method. The method is characterized in that: a duty ratio of a solenoid valve for controlling the engagement and separation of clutches in a double-clutch automatic transmission is adjusted to control a matched timing sequence of two clutches and respective joint speed and joint pressure thereof in the shifting process, so that the sum of transmission torque of a front clutch and a subsequent clutch adapts to the torque of an engine in the shifting process; and a shifting moment and a corresponding shift method are determined according to an accelerator pedal position signal acquired by a sensor, the rotating speed of the engine, the rotating speed and a clutch pressure signal of an input shaft of the front clutch and the rotating speed and a clutch pressure signal of an input shaft of the subsequent clutch. By the method, the shifting process is stable and rapid, the shifting quality is high, and the riding comfort is improved.

The invention discloses a control device and method for starting of an AMT vehicle on a ramp, which comprises a signal collecting unit, an electronic control unit and an actuating mechanism. The electronic control unit comprises a signal receiving module, a signal analysis and judgment module and a control signal output module, and the actuating mechanism comprises a clutch motor and a throttle motor. The signal collecting unit at least comprises a brake sensor of first level and a brake sensor of second level, the signal analysis and judgment module determines the engaging extent of a clutch and the opening extent of an air control shutter according to the signals collected by the brake sensors of first and second level and received by the signal receiving module, and the control signal output module respectively controls the actions of the clutch motor and the throttle motor according to the engaging extent of the clutch and the opening extent of the air control shutter. The control method for starting of the AMT vehicle on the ramp provided by the invention enables the engaging extent of the clutch and the opening extent of the air control shutter not to be zero when a brake pedal is released, thereby overcoming the starting spark extinction and back sliding of the vehicle caused by factors like friction force, engine torque, etc. during staring of the vehicle on the ramp.

The invention relates to a design method for few parabolic type variable cross-section main spring end and auxiliary spring gaps, and belongs to the technical field of suspension steel plate springs. The method comprises the steps that according to the structural size and elastic modulus of each parabolic type variable cross-section main spring, an end point deformation coefficient of each main spring and a deformation coefficient Gx-CD of the Nth main spring on the contact point of an auxiliary spring and the end straight section; then, according to the auxiliary spring acting load design requirement value and the end point deformation coefficient of each main spring, the endpoint force FN of the Nth main spring is obtained; then, according to the thickness h2 of the straight section at the root of the Nth main spring, the FN and the Gx-CD, the main and auxiliary gaps between the contact points of the auxiliary springs and the end straight sections of the main springs are designed. According to simulation verification, the accurate and reliable main and auxiliary spring gap design values can be obtained by means of the method, the auxiliary spring acting load design requirement is met, and the product design level and performance and the vehicle ride comfort are improved; meanwhile, the product development speed is increased, and the design and testing expenses are lowered.

A driver assistance system for motor vehicles, having a velocity regulation function for regulating the velocity of the subject vehicle to a nominal velocity, and having an adjacent-lane monitoring function, characterized by a turning assistance function which, when the velocity regulation function is active and an incoming signal indicates an imminent turning process that requires crossing an adjacent lane, monitors the traffic in the adjacent lane with the aid of the adjacent-lane monitoring function, and, as a function of locations and velocities of traffic participants in the adjacent lane, determines a spatial and temporal window for moving into the adjacent lane and adapts the nominal velocity to this window.

The invention relates to the field of vehicle control, in particular to a nonlinear model prediction control method of regenerative braking of an electric vehicle. The method adopts a nonlinear model prediction control strategy of a rapid system, on the basis of establishing an electric vehicle regenerative braking nonlinear model, subsystem operating state signals, acquired by sensors, of the entire vehicle, wheels, suspensions and motors in the braking process of the electric vehicle are acquired, and multiple purposes, namely controlling speed accurately, guaranteeing vehicle stability, improving driving smoothness and regenerative braking energy recovering efficiency, in the braking process are controlled coordinately. The control system is mainly applied into the driving and braking processes of traditional vehicles and electric vehicles, especially the multipurpose controlling process of strong nonlinear systems.

The invention relates to a method for verifying strength of each leaf of end contact type few-leaf oblique main and auxiliary springs and belongs to the technical field of suspension leaf springs. It is possible to verify and calculate stress strength of each of main and auxiliary leaves according to structural parameters, elastic model and allowable stress of all main and auxiliary leaves of the end contact type few-leaf oblique variable-section main and auxiliary springs, acting load of each auxiliary spring and maximum load bearable by a main spring. Experiments and simulation tests show that this method is correct, maximum stress verification calculations of all main and auxiliary leaves are accurate and reliable, the design level, product quality and life of the end contact type few-leaf oblique variable-section main and auxiliary leaf springs as well as vehicle driving smoothness may be improved; meanwhile, it is also possible to reduce designing and testing cost and increase product development speed.

The invention relates to a heavy-load type oil-gas spring independent suspension steering drive axle which comprises a central main reducing gear assembly, an upper cross arm, a lower cross arm, a hub reducing gear assembly, a double-rzeppa type constant velocity universal transmission shaft, a steering joint seat, an oil-gas spring and a steering rod system, wherein the central main reducing gear assembly is located in the center of the steering drive axle and fixedly connected to a frame, and structures of the heavy-load type oil-gas spring independent suspension steering drive axle at the left end and the right end of the central main reducing gear assembly are the same and symmetrically distributed. The steering joint seat is adopted, thus stress in the front, back, left and right directions of the whole steering drive axle trends to be more uniform and reasonable, the steering drive axle has higher traveling smoothness and better maneuverability, and the regulation of ground clearance can be realized at the same time of regulating the height of the frame. The upper cross arm and the lower cross arm of the heavy-load type oil-gas spring independent suspension steering drive axle are respectively of an integral structure, thereby improving the structural rigidity. Both ends of the upper cross arm and the lower cross arm are respectively connected with the steering joint seat and a main reducing gear shell through pin shafts, and the reasonable optimization of swing arm connection points ensures that the changes of wheel tracks and wheel inclination angles are the minimum when wheels jump up and down to the limit, thereby improving the controllabitity and the stability of a chassis.

The invention provides an adaptive cruise acceleration method, an adaptive cruise acceleration device and an adaptive cruise acceleration system. The method comprises the following steps: the required torque is calculated according to the expected speed; the required torque is filtered according to the filter coefficient, and the required torque after filtering is sent to an engine management system; and the engine management system converts the required torque after filtering into virtual throttle opening degree to realize adaptive cruise acceleration. According to the embodiment of the invention, the frequency of transmission upshift and downshift is reduced, the longitudinal acceleration of vehicles is enabled to change smoothly, passengers in vehicles feel more comfortable, and the service life of the engine and the transmission is improved.

The invention discloses a system and method for controlling the interconnecting state of a transversely interconnected air suspension with the orientation to stability of vehicle body postures. All unsprung mass acceleration sensors transmit acceleration information to a signal pre-processing system, the output of the information pre-processing system is connected with input of an ECU 5, the output of a CAN bus communication system is connected with the input of the information pre-processing system and the input of the ECU 5, the interconnection state control algorithm is integrated in the ECU, the output of the ECU is connected with an interconnection state control driving module, the output of the interconnection state control driving module is connected with an interconnection solenoid valve through a control line, and the output of a steering wheel angle sensor is connected with the input of the ECU through a signal transmission line. The running smoothness of a vehicle on a poor road face is improved by reasonably controlling the interconnection state of the transversely interconnected air suspension, the control stability of the vehicle during high-speed steering is not influenced, and it is possible for the interconnected air suspension to be applied to a small-sized vehicle.

The invention discloses a structure and method for reducing the equivalent unsprung weight of a wheel electrically-driven system of a single trailing arm type suspension, which is characterized in that an elastic rubber hinge is supported on a frame, one end of a swing arm of the single trailing arm type suspension is connected with the elastic rubber hinge, and the other end of the swing arm is connected with a reducer casing; the reducer casing is connected with a sleeve of a half axle; a motor is fixedly arranged on the reducer casing, the power output end of the motor is connected with a small gear, then the small gear is meshed with the large gear, and the large gear is connected with the sleeve of the half axle; and after the gear reducing is performed, the power is outputted to a rim by the half axle so as to drive wheels. The equivalent unsprung weight is reduced by reducing the distance between the mass centre of non-concentric parts of a wheel and a central swing axis of the single trailing arm type suspension. The structure and method disclosed by the invention have the advantages of increasing the vibration frequencies of wheels, reducing the resonance, reducing the impact and vibration from road surfaces, and improving the running smoothness of vehicles.

The invention relates to an unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering and belongs to the field of electric automobiles. The unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering comprises an unequal double-wishbone suspension, a driving motor, a steering motor, a universal transmission shaft, a worm and gear reducer, a bevel pinion, a transmission bevel gear, a bevel gear wheel, a brake caliper, an axle housing and wheels, wherein the driving motor and the steering motor are both fixedly arranged on an automobile frame; the driving motor drives the wheels to rotate through the universal transmission shaft and gear transmission; the bevel gear wheel simultaneously plays the role of a brake disc; and the steering motor achieves steering of automobiles through the universal transmission shaft and the worm and gear reducer; the transmission bevel gear is sleeved on a master pin in empty mode; and a worm gear is connected with the master pin through a flat key. When automobiles steer, mutually independent operation of a driving system and a steering system can be achieved by reasonably controlling the rotate speed of the driving motor. The unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering not only achieves large-angle steering, but also reduces the unsprung mass of the automobiles, and improves the flexibility of the automobiles and riding comfort.

The embodiment of the invention discloses a vehicle speed planning method. The method comprises the steps that according to crooked roots rate radius of a target front path and a reference front path,the initial planning speed of target path location and reference path point location is determined, and a first lateral and a second lateral acceleration are not more than a lateral acceleration threshold value; according to the initial planning speed of the target path point, the initial planning speed and the reference journey of the reference path point, target vertical acceleration and the target planning speed of the target path point are determined to make the target vertical acceleration in the a limit range of a vertical acceleration. Therefore, in the target path point location, the vehicle which drives according to the target planning speed and the target vertical acceleration is capable of avoiding violent speed reduction and violent lateral deviation, and therefore not only is driving safety of the vehicle improved, but also the taking comfort level of the passengers in the vehicle is improved, and the energy is saved. Besides, the embodiment of the invention further provides a vehicle speed planning device and equipment.

A MacPherson air suspension comprises a cross stabilizer bar, two strut assemblies arranged on the left side and the right side of the cross stabilizer bar, a left steering knuckle, a right steering knuckle, a left lower suspension arm, a right lower suspension arm and a left-right stabilizer bar connection push rod connecting the cross stabilizer bar and the strut assemblies. Each strut assembly comprises a front shock absorber and an air spring assembly integrated on the front shock absorber, and the front shock absorber is fastened with the lower support of the front shock absorber through bolts. The upper ends of the left steering knuckle and right steering knuckle are respectively connected with the upper portion of the lower support of the front shock absorber through ball pin fittings, the lower portions of the left steering knuckle and right steering knuckle are connected with shaft sleeve connection plates of the steering knuckles through shaft pins and are connected with the lower portion of the lower support of the front shock absorber through the shaft sleeve connection plates, and the left steering knuckle and right steering knuckle respectively form an integrated frame structure with the lower support of the front shock absorber. The central connection line of the ball joints of the ball pin fittings and the shaft sleeves of the shaft sleeve connection plates of the steering knuckles is a main pin axis a. The MacPherson air suspension can meet the requirements of an automobile under various loading conditions, and ideal comfortable ride comfort can be obtained.

The invention relates to a design method for the limit deflections of end part contact type less-leaf parabola type main and auxiliary springs, and belongs to the technical field of suspension steel plate springs. According to the method, the limit deflections of the end part contact type less-leaf parabola type main and auxiliary springs can be designed according to the structural parameters, the elastic modulus, the maximum allowable safe stress and the free length of a limiting block of all leaf springs. A prototype loading transformation test shows that the design method for the limit deflections of the end part contact type less-leaf parabola type main and auxiliary springs is correct, an accurate and reliable limit deflection design value can be obtained, and a reliable technological basis is laid for the design of the end part contact type less-leaf parabola type main and auxiliary springs and the development of CAD software. By the use of the method, the design level, the quality and the performance of a product can be improved, and the vehicle running smoothness can be improved; meanwhile, the cost for product design and test is reduced, and the product development speed is increased.

The invention discloses a vehicle door system and a vehicle. The vehicle door system comprises a vehicle door, a vehicle door lock, a limiting stopper and a control unit, wherein the vehicle door lockis installed at the vehicle door and comprises a vehicle door lock driving unit; the limiting stopper comprises a limiting stopper housing, a limiting stopper bracket and a limiting stopper driving unit; the limiting stopper housing is connected with the vehicle door; the limiting stopper bracket is connected with a vehicle body; the limiting stopper driving unit is used for driving the limitingstopper housing to move relative to the limiting stopper bracket; the control unit is electrically connected with the vehicle door lock driving unit and the limiting stopper driving unit; the controlunit is set for controlling the vehicle door lock driving unit to drive the vehicle door to be unlocked and then controlling the limiting stopper driving unit to drive the limiting stopper housing tomove toward a direction far away from the vehicle body, and / or controlling the limiting stopper driving unit to drive the limiting stopper driving unit to drive the limiting stopper housing to move toward a direction close to the vehicle body and then controlling the vehicle door lock driving unit to drive the vehicle door to be locked. The vehicle door system disclosed by the invention can be used for intelligently controlling the vehicle door so as to meet the use requirements, on the vehicle door, of passengers.

The invention relates to an engineering machine balancing rocker arm chassis travelling device which consists of a frame, an intermediate main shaft, a rocker arm rack, a rocker arm, a set of ground gap adjusting mechanism, a travelling motor and brake device, a balance mechanism, a steering device and wheels, wherein the frame is arranged on the rocker arm rack by the intermediate main shaft andthe balance mechanism; the rocker arm rack is connected with the rocker arm by the set of ground gap adjusting mechanism; and the front end of the rocker arm is connected with the steering device which is connected with the travelling motor and brake device by a bolt and is simultaneously connected with the wheels. After the engineering machine balancing rocker arm chassis travelling device is adopted, a common chassis is guaranteed to have the functions of adjusting the posture, changing the ground gap and carrying out all-wheel hydraulic driving and hydraulic steering on the precondition that the common chassis is ensured to operate at higher movement speed, so that the obstacle climbing capability and the passing performance of a vehicle can be improved. Therefore, the engineering machine balancing rocker arm chassis travelling device has a better practical value and a wide application prospect in the technical field of engineering machinery.

The invention relates to a method for designing optimal damping characteristics of a shock absorber of a vehicle steel plate spring suspension system, and belongs to the technical field of vehicle steel plate spring suspensions. The method is characterized by including the steps of conducting optimization design on the optimal damping ratio required by the suspension system according to parameters of the vehicle suspension system, calculating and analyzing the damping ratio of the steel plate spring suspension system according to displacement and loads measured through steel plate spring loading and unloading deformation tests, and designing the optimal damping characteristics of the shock absorber of the vehicle steel plate spring suspension system on this basis. It can be known from Matlab / simulink simulation verification that the optimal damping characteristic design value of the shock absorber of the steel plate spring suspension system can be designed according to the method, the optimal damping matching can be achieved for the vehicle steel plate spring suspension system, and vehicle driving smoothness is improved; meanwhile, repeated tests and verification can be avoided, the development speed of products can be increased, and design and test expenses can be reduced.

The invention relates to a method for designing limiting deflection of few-leaf two-end-reinforced plate springs with ends of non-equal structures, and belongs to the technical field of suspension steel plate springs. The limiting deflection of the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures can be designed by the aid of the method according to structural parameters, elastic modulus and the maximum allowable safety stress of various leaf springs and the free lengths of limiting stoppers. The method has the advantages that as known from sample machine loading deformation experiments and tests, the method for designing the limiting deflection of the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures is correct, accurate and reliable limiting deflection design values can be obtained by the aid of the method, and a reliable technical foundation can be laid for designing the few-leaf two-end-reinforced plate springs with the ends of the non-equal structures and developing CAD (computer-aided design) software; the design level of products can be upgraded by the aid of the method, the quality and the performance of the products and the riding comfort of vehicles can be improved, the design, experiment and test costs of the products can be reduced, and the product development speeds can be increased.

The invention discloses an automatic linkage hooking control method used for a locomotive. The method comprises the following steps of obtaining the initial state of a traction locomotive; when the initial state meets a linkage hooking starting condition, detecting a distance between the traction locomotive and a back trailer; comparing a current distance value with at least two preset distance intervals corresponding to different speed ranges respectively, determining a preset distance interval to which the current distance value belongs, and controlling the traction locomotive to run in the car speed range corresponding to the preset distance interval; when the traction locomotive meets a linkage hooking condition, applying braking to and carrying out linkage hooking operation on the traction locomotive. The invention also discloses an automatic linkage hooking control device used for the locomotive. The invention also discloses the locomotive comprising the automatic linkage hooking control device. By using the automatic linkage hooking control method, linkage hooking operation steps can be simplified; the linkage hooking impact is reduced; the riding comfort of a driver is improved; the operation time wasted due to the failure of linkage hooking is saved.

The invention relates to a safe and efficient operation active adhesion controlling method for a motor train unit. The method comprises the following steps: S1, designing an adhesion torque observer for estimating an adhesion torque il between train wheels and a rail in real time according to a single-axis dynamical model and the full-dimensional state observer principle; S2, deriving an adaptive limiting torque Tlim of a traction motor according to the adhesion torque il, a body acceleration value a and a variable step length algorithm; and S3, designing an adhesion controller according to the daptive limiting torque Tlim of the traction motor and a motor output torque index value Tm* given by a superior traction control system, to coordinate traction control and adhesion control. The method effectively improves the traction braking efficiency of a train, reduces wheel-rail wear, strengthens safe and stable operation of the train, prolongs the service lives of wheels and rails, improves the comfort of passengers and reduces energy consumption of the train.

The invention relates to an oil gas suspension system for a means of transport, in particular to an external electromagnetic valve type three-stage damp adjustable oil gas suspension system for electric control, and belongs to the field of engineering element or part. The oil gas suspension system comprises a piston, a cylinder, an oil pipe, a damping valve, an energy accumulator, an electric control unit and a vehicle body acceleration sensor, wherein the piston divides the cylinder into two cavities which are not communicated; the upper cavity of the cylinder is provided with an oil discharge orifice which is connected with the external damping valve and the energy accumulator through the oil pipe; and the lower cavity is communicated with the atmosphere. When oil fluid passes through the external damping valve, damping force is adjusted through adjusting the total throttling area of the oil fluid in the damping valve or through controlling the valve opening pressure of an oil circuit in the damping valve. The vehicle body acceleration sensor is used for detecting acceleration signals of the vehicle body; and the electric control unit controls the on / off of the electromagnetic valve based on the detected acceleration signals of the vehicle body, thereby realizing adjustment of the damping force. The oil gas suspension system has the advantages of simple structure, easy realization, simple control and convenient repair.

The invention relates to an excessive phase control strategy for a traction converter of a hybrid power motor train unit. An overhead line system power supply mode is adopted in front of and behind an excessive phase, the direct-current output voltage of a four-quadrant rectifier 4QC is given by a traction inverter, and the traction inverter sends different direct-current voltage command values to the 4QC according to different working conditions; a DC / DC battery system works in a charging state or a discharging state according to the different working conditions and the electric quantity condition of the DC / DC battery system; and six modes are formed according to the different working conditions of the locomotive excessive phase and the state of the DC / DC battery system. By the adoption of the strategy, the motor train unit normally passes through a split-phase region, meanwhile, the DC / DC battery system (a power battery system) of the hybrid power motor train unit is used for supplying traction energy or recycling braking energy in the split-phase region, and therefore the purposes that the traction excessive phase, energy conservation and environment protection are achieved.

The invention discloses an energy recovery braking system for an automobile suspension, which is arranged between the automobile suspension and a pneumatic braking system. The invention adopts the following technical scheme that the system comprises an energy accumulator, an energy recovery cylinder, an energy recovery cylinder II and an energy recovery control module, wherein one end of the energy recovery cylinder is connected with the suspension, the other end of the energy recovery cylinder is connected with the energy accumulator, and the other end of the energy accumulator is connected with an air reservoir of the pneumatic braking system; the cylinder body of the energy recovery cylinder is fixedly arranged on an axle, a piston rod end is arranged on the automobile suspension, and a non-return valve is arranged between the energy recovery cylinder and the energy accumulator; the energy recovery control module is connected with the air reservoir; and the cylinder body of the energy recovery cylinder II is fixedly arranged on the axle, the piston rod end is connected with the automobile suspension through a stroke lever, and a non-return valve is arranged between the energy recovery cylinder II and the energy accumulator. The new design is not only an energy saving design of energy feedback but also provides a certain damping characteristic for the original leaf spring suspension system, thereby being favorable for attenuating the vibration energy and improving the running smoothness of automobiles.

The invention relates an automatic train operating apparatus which can reduce energy loss that occurs during traveling to achieve energy-saved operation. This apparatus deal with an automatic train operation device that generates a traveling pattern, for making a train stop at a prescribed position at a prescribed time and that gives a traction command for achieving the traveling pattern to a driving and control device having an electrical apparatus. This device is provided with a loss index computing means (16), that computes a loss index that represents energy loss generated in the driving and controlling device during the train traveling time and a traveling pattern correcting means (19) that corrects the traveling pattern, based on the loss index to set a period of time, until the train stops at the prescribed position to a prescribed value.

The invention discloses a device and a method for judging AMT vehicle clutch half joint. The device comprises a signal collecting unit and an electronic control unit, wherein the signal collecting unit comprises an engine speed sensor, a speed change gear shaft speed sensor and a clutch position sensor which are respectively connected with an electronic control unit. The control unit is used for collecting a clutch position signal sent by the clutch position sensor when the engine speed is less than a first preset value after an AMT vehicle enters P shift and the absolute value of the speed change gear shaft speed difference is less than a second preset value. The invention can improve the accuracy of collected clutch half joint, thereby improving the running smoothness of the vehicle, reducing clutch wear, prolonging clutch service life, ensuring steady running of the engine and reducing engine speed fluctuation.

The invention relates to a design method for the arc height of an end-non-isomorphic few-leaf root-strengthening-type steel plate spring, belonging to the technical field of suspension steel plate springs. According to the design method, the initial tangent arc height of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring can be designed according to the structure parameters, the elastic modulus, the rated load and a residue tangent arc height design required value under the rated load of each leaf of spring. According to a model machine loading deformation test, the design method for the arc height of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring is correct; an accurate and reliable initial tangent arc height design value can be obtained; and a reliable technical basis is provided for design and CAD software development of the end-non-isomorphic few-leaf root-strengthening-type steel plate spring. By utilizing the method, the product design level, quality and performance and automobile driving smoothness can be improved; meanwhile, product design and testing cost is lowered; and product development is accelerated.

A composite suspension device for torsion bar coil springs comprises two symmetrical suspension devices with double wishbones, wherein each suspension device comprises a suspension support (5), a telescopic shock absorber (4), an upper suspension lever (3) and a lower suspension lever (3), a main flexible element employs a coil spring (1) and a supplementary element uses a torsion bar spring (9). The invention can be used for rear axles of off-road vehicles. The suspension system realizes large travel, heavy load and variable rigidity characteristic, simultaneously reduces processing difficulty of coil springs, decreases shear stress which each elastic element receives in operational process, thereby prolonging the service life of coil springs, increasing reliability of the suspension system and the entire car and decreasing processing and manufacturing costs of the suspension system.

The invention discloses an elevator traction belt and an elevator with the traction belt. The traction belt comprises a wrapping layer and at least one bearing body sleeved with the wrapping layer. Each bearing boy comprises basalt fibers and a resin matrix which are compounded together. The basalt fibers comprise multiple parallel basalt fiber filaments. Due to the fact that density of the basalt fibers and the density of the resin are both smaller than that of a steel wire, the weight of the traction belt is effectively reduced, the traction belt can be easily used on the elevator with superlarge lifting height, and the range of an existing maximum elevator lifting height can be widened. Meanwhile, the basalt fibers have a good sound absorption effect, the traction belt is made from the basalt fibers, noise generated during operation of the traction belt can be effectively lowered, and elevator taking comfort is improved. The basalt fiber filaments are arranged in the resin matrix in parallel, friction force among the fiber mono-filaments is reduced, the traction belt has the advantages of being free of twisting, resistant to abrasion, resistant to fatigue and the like, the traction performance of the traction belt is improved, and the service life of the traction belt is prolonged.