382 results about "Rolling resistance" patented technology

A wheel assembly to be coupled to a hub of a vehicle may include an inner rim to be coupled to the hub of the vehicle and an outer rim surrounding the inner rim. The wheel assembly may also include gas springs operatively coupled between the inner rim and the outer rim to provide a gas suspension for relative movement between the inner rim and the outer rim. Each of the gas springs may have a controllable gas pressure. The wheel assembly also includes a wheel rotational position sensor, a vehicle operator control input interface, and a controller configured to control the gas pressure in each of the gas springs in a pattern in response to the wheel rotational position sensor and vehicle operator control input interface to assist in one of overcoming a rolling resistance of the wheel and a braking of the wheel.

The invention discloses a complex terrain-oriented tracked vehicle energy efficiency optimization path planning method and system, and the method comprises the steps: firstly constructing a joint energy consumption model on a rasterized three-dimensional terrain, and superposing the straight rolling resistance, gradient and steering equivalent resistance moment energy consumption to obtain node cost; then, under the framework of a weighted A * function, the product of Euclidean distance and energy consumption rate is used as a heuristic function, and rapid rough search is achieved; halton sampling is carried out on the coarse path nodes, an environment vector is calculated based on the distance between a sample and the center and the gradient difference, offsets are carried out, impassable samples are removed, secondary search is carried out after a probability road network is reconstructed, and the local path quality is improved; and finally, smoothing the broken line by using a three-dimensional fourth-order B spline, eliminating the conflict with the impassable area by densifying nodes, and outputting an executable track with continuous curvature. Simulation shows that compared with A *, Dijkstra and PRM algorithms in complex terrains, the method saves energy by 5.2%-12% on average, and the energy saving performance of the tracked vehicle is achieved.

The invention relates to the technical field of tire processing, in particular to a pattern and rolling resistance simulation evaluation method and system for a rubber engineering tire. The method comprises the following steps: acquiring tire pattern parameters; building a finite element model of tire-road surface contact according to the tire pattern parameters; according to the finite element model, determining deformation distribution, longitudinal tensile strain, grounding pressure distribution and pavement contact rigidity of the tire in the rolling process; and determining a rolling resistance evaluation value according to the deformation distribution, the longitudinal tensile strain, the grounding pressure distribution and the pavement contact rigidity. And rapid parameterization iteration is supported, and modeling errors caused by non-uniform geometric feature description are avoided. And the simulation accuracy and repeatability are ensured. The influence of the pattern structure on the rolling process is reflected, and a foundation is laid for a rolling resistance evaluation value. Quantitative evaluation of the tire rolling resistance is realized, data-driven design optimization is supported, and the simulation efficiency is improved.

The invention relates to the technical field of tire rubber manufacturing, and discloses an EV tire tread rubber composition adapting to low temperature and a mixing method thereof. According to the invention, the high-vinyl solution polymerized styrene-butadiene rubber A, the low-glass transition temperature solution polymerized styrene-butadiene rubber B and the lithium-series cis-butadiene are matched to form a rubber substrate, and the high-dispersion white carbon black, the bio-based filling oil and the high-proportion wet-skid-resistant resin are matched, so that the matching amount of various raw materials is strictly controlled; and the rolling resistance of the tire at low temperature is effectively reduced while the gripping performance of the tire is ensured.

The invention relates to the technical field of low-carbon microalloyed steel production, in particular to a high-efficiency rolled thin L450M pipeline steel plate and a manufacturing method thereof, the steel comprises the following chemical components in percentage by weight: 0.05%-0.07% of C, 0.10%-0.25% of Si, 1.45%-1.55% of Mn, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.05%-0.06% of V, 0.05%-0.10% of Cr, 0.008%-0.020% of Ti, 0.015%-0.04% of Al, 0.005%-0.009% of N and the balance of Fe and inevitable impurities, and the total amount of impurity elements is less than 0.05%; the production process of the steel plate comprises the steps of molten steel smelting, external refining and degassing, continuous casting, casting blank heating, controlled rolling, controlled cooling and air cooling to the room temperature. The method is used for manufacturing the high-strength L450M hot-rolled steel plate for the oil pipeline with the thickness specification being 9-15 mm and the pipe diameter being phi 914 mm or below, the problems that the steel plate rolling efficiency is low, the rolling resistance is large, the steel plate performance uniformity and the plate shape are not easy to control and the like are solved, and the steel plate has the advantages of being low in cost, high in strength and toughness, high in strength, excellent in low-temperature toughness and the like.

The invention discloses a method for increasing the sidewall turn-up height in a building process of an all-steel radial tire, which comprises the following steps of: acquiring multi-source data such as temperature, pressure and angle in a turn-up process through an infrared temperature sensor, a pressure sensor and the like; and constructing a multiple linear regression model, a machine learning model and a hybrid model fused with the physical principle, analyzing the relationship between the process parameters and the anti-package height, and performing verification and optimization. According to model output parameters, a servo motor is used for accurately controlling the downward pressing angle and pressure of a reverse wrapping pressing roller, and production is executed in cooperation with an auxiliary supporting ring and a sectional type reverse wrapping technology; meanwhile, the turn-up height is detected in real time through an intelligent monitoring system, and parameters are automatically adjusted when the turn-up height does not reach the standard. According to the method, precise regulation and control of the tire sidewall turn-up height are achieved, compared with a traditional process, the product percent of pass is increased to 95% or above from 85%, the production efficiency is improved by 20%-30%, the tire structure stability is effectively enhanced, the rolling resistance and the tire burst risk are reduced, and intelligent upgrading of tire manufacturing is promoted.

The invention discloses a tire material modulus determination method and device. The method comprises the steps that a two-dimensional material distribution diagram of a tire is obtained, a two-dimensional finite element tire model is constructed based on the two-dimensional material distribution diagram, and then a three-dimensional finite element tire model is constructed; the circulation process is as follows: first modulus distribution data of the current circulation are taken, and second modulus distribution data are obtained through amplification by a preset multiple; the first modulus distribution data and the second modulus distribution data are substituted into the three-dimensional model for steady-state rolling simulation, and a first simulation result and a second simulation result are obtained; determining deformation index distribution data of the tire according to the two simulation results; if the deformation index does not meet the preset condition, correcting the first modulus distribution data according to a preset adjustment rule, and applying the first modulus distribution data to the next cycle; and if a preset condition is met, ending circulation, and outputting final first modulus distribution data. The technical problems of low durability and high rolling resistance of the tire caused by unreasonable configuration of the modulus of the tire material in the tire production process are solved.

The invention relates to the technical field of road load testing, in particular to an automobile road load testing method and system. The method comprises the steps that a wind tunnel test environment is arranged, in the wind tunnel test environment, wheels of a to-be-tested vehicle are arranged on a wheel driving unit, a vehicle body is connected with a six-component force measuring balance through a vehicle skirt restraint system, and the vehicle skirt restraint system adopts a floating mode; airflow is controlled to blow through the surface of the vehicle, the central belt simulates ground motion, and the central belt and the wheel driving unit are synchronous with wind speed; the to-be-tested vehicle moves at each reference vehicle speed; after each reference vehicle speed is stable, determining the aerodynamic resistance of the to-be-measured vehicle at each reference vehicle speed based on a balance force transducer; meanwhile, based on the wheel driving unit, the rolling resistance of the wheel is determined; and determining the road load of the to-be-tested vehicle according to the rolling resistance and the aerodynamic resistance. According to the invention, the road load can be obtained more accurately, efficiently and quickly.

The invention discloses a low-noise and low-rolling-resistance tire tread and a preparation method thereof, and relates to the technical field of tire production, the low-noise and low-rolling-resistance tire tread comprises a supporting layer and multiphase composite tread rubber; the multiphase composite tread rubber comprises a continuous phase matrix, white carbon black with a two-phase structure, functionalized multiwalled carbon nanotubes, a disilane coupling agent, dynamic crosslinking thermoplastic elastomer particles, zinc oxide, stearic acid, an anti-aging agent, an accelerant and sulfur, and good wear resistance and mechanical strength are kept while the rolling resistance and driving noise of a tire are remarkably reduced.

The present application relates to the technical field of rubber, in particular to a kind of hydrazide compound, rubber composition and its preparation method and application.The present application provides a kind of hydrazide compound, is mono-hydrazide compound or double hydrazide compound, they have lower melting point, can be well dispersed in rubber matrix in the range of mixing temperature, further ensure its effect.And the hydrazide compound of this kind is added to rubber composition, can obtain the tire product of processing performance improvement, dynamic modulus promotion, anti-wet sliding and balanced rolling resistance.

The invention relates to a tyre (1) provided with a crown (4) comprising a crown reinforcement (20), a sublayer (7) and a tread (6). The lower layer (7) comprises a first base layer (71) radially outside the crown reinforcement (20) and a second cover layer (72) radially outside the first base layer (71) and radially inside the tread (6). The dynamic shear modulus G1 * of the first base layer is 1.5 MPa or less, and the dynamic shear modulus of the second cover layer is 5 MPa or more. The thickness E72 of the second cover layer (72) is associated with the maximum thickness ESC under the cut by the following relational expressions: E72 (mm) is greater than or equal to (0.53 * ESC + 0.1), E72 (mm) is less than or equal to (0.47 * esc + 1.1), ESC is in [1; 3.5] mm.

A multi-segment support (10) of a non-pneumatic tire, comprising at least three leg portions (11) connected in sequence and nose portions (12) correspondingly connected between any two adjacent leg portions (11). Each leg portion (11) comprises a framework (1101) and a connecting portion (1102) connected to the framework (1101), and the connecting portion (1102) and the nose portions (12) are both made of a polymer elastic material and are fixedly connected to each other. Since each leg portion (11) comprises the framework (1101), and the framework (1101) provides an effect of supporting and has a lower deformation capability than the elastic material, the amount of the elastic material used of the leg portion (11) can be reduced, and the use of the elastic material at a deformed and stressed portion can be avoided, thereby significantly reducing a rolling resistance. In addition, the nose portions (12) made of polymer elastic materials enable the multi-segment support (10) to have a deformation capability when subjected to a force, can serve as a movable joint connecting two adjacent leg portions (11), and provide effects of buffering and shock absorption. In addition, the connecting portions (1102) and the nose portions (12) are made of polymer elastic materials and are fixedly connected to each other, such that each leg portion (11) and each nose portion (12) can be connected and combined as one piece. Further disclosed is a non-pneumatic tire comprising the multi-segment support.

The present invention relates to tyre elastomeric compositions and compounds, to tyres for vehicle wheels comprising them which are particularly performant and advantageous for summer use. The tyres of the invention, comprising such compounds especially in the tread band, are characterized by reduced wear and rolling resistance and high grip, both under wet and dry conditions. These advantageous features are obtained by combining certain conjugated diene polymers with a plasticizing admixture with a predetermined content of resins and oils.

This invention relates to the field of new energy vehicles, specifically to a vehicle anti-rollback control method, device, and vehicle. It includes the following steps: When the vehicle is in a parking position, if the vehicle meets the torque compensation conditions, the base torque and rolling resistance weighted torque are added to obtain the target compensation torque for the motor, and torque adjustment control is performed. The rolling resistance weighted torque is updated as follows: an initial value of the rolling resistance weighted torque is set and stored; the torque T_g1 of the motor controlled by torque control is obtained; when the motor speed remains at zero, the time difference t_diff is calculated, and the current motor torque T_g2 is obtained. When the time difference is greater than the preset time difference t_diff1, the rolling resistance weighted torque is: (t_diff-t_diff1) / t_diff1*(T_g2-T_g1). If the absolute value of the difference between the calculated rolling resistance weighted torque and the stored rolling resistance weighted torque is greater than or equal to a preset threshold for the difference in rolling resistance weighted torque, then it is updated; otherwise, it is not updated. If the current vehicle meets the speed control conditions, speed control is performed, controlling the motor speed to zero. This prevents the vehicle from rolling backward and ensures vehicle safety.

The invention relates to a tyre (1) provided with a crown (4) which is optimized for an advantageous compromise between drivability and rolling resistance. The crown (4) comprises a crown reinforcement (20), a lower layer (7) and a tread (6). The lower layer (7) comprises a first base layer (71) radially outside the crown reinforcement (20) and a second cover layer (72) radially outside the first base layer (71) and radially inside the tread (6). The dynamic shear modulus G1 * of the first base layer is 1.5 MPa or less, and the dynamic shear modulus of the second cover layer is 5 MPa or more. The thickness of the second cover layer (72) is [20%; 80%].

The invention discloses a method and system for calculating the influence of electric vehicle tire rolling resistance on energy consumption based on cold region working conditions, and belongs to the field of electric vehicle energy consumption calculation. An existing electric vehicle energy consumption calculation method has the defects in the aspects of calculation precision, environmental adaptability and the like. According to the method, a multi-factor coupled tire rolling state finite element model under the low-temperature working condition is constructed by coupling the environment temperature, the road surface condition, the running speed, the tire pressure and the vertical load condition; through a finite element model, strain energy density accumulated values of all tire rubber material units are extracted, all the tire rubber material units are partitioned and labeled according to angles, then the strain energy density accumulated values are calculated, and a tire rolling energy consumption loss model is obtained; through calculation of the tire rolling energy consumption loss and the energy consumption of the electric vehicle, energy consumption caused by tire rolling is obtained, and then the influence of the tire rolling resistance on the energy consumption is obtained. The calculation precision of the energy consumption of the electric vehicle is improved through a multi-factor coupling verification model such as the temperature and the road surface.

To provide a pneumatic tire capable of improving riding comfort performance while suppressing deterioration of low rolling performance.SOLUTION: The pneumatic tire 1 includes a cap rubber 2C having a rubber hardness B. In a tire meridian cross section of a normal state, a rim protector 10 having a top part 11 projecting to a tire outer side is formed on an outer surface side 4s of a first bead part side 4A. The rim protector 10 includes an inside circular arc surface 12 of a curvature radius C (mm) extending from a top part 11 to the inside in the tire radial direction and having a 12c central part in the tire outside. When a separation distance in the tire axial direction between the top portion 11 and a tire radial direction line RL defining a rim width of a normal rim R is H, the following formula (1) is satisfied. 12.8 ≤ H * B / C ≤ 93.5 (1) SELECTED DRAWING: Figure 1

The aim is to improve overall performance, including rolling resistance, tire durability at high speeds, and handling stability. [Solution] A tire comprising a carcass with carcass cords, a belt with belt cords provided on the radially outer side of the carcass, a band with band cords provided on the radially outer side of the belt, and a tread provided on the radially outer side of the band, wherein the band cords are band cords containing polyethylene terephthalate fibers, and the tread is formed using a rubber composition containing more than 50 parts by mass of styrene-butadiene rubber (SBR) with a styrene content of less than 25% by mass in 100 parts by mass of rubber component, and furthermore, when the thickness of the tread is T (mm), the amount of styrene in the styrene-butadiene rubber is S (mass%), and the diameter of the band cord is D (mm), the tire satisfies the following (Formula 1). T×S×D<80 (Formula 1)

The climbing steering driving wheel assembly of the cleaning robot comprises an upper integrated seat, and second machine shells are evenly installed at the bottom of one side of the upper integrated seat. During climbing, the miniature reversible air pump can be controlled by the controller to inflate the anti-explosion air bag layer fixed in the steering adjusting wheel through the rotary joint, so that the corrugated air pipe distributed on the outer wall of the anti-explosion air bag layer is expanded, and then the deformed corrugated air pipe can push the storable ground gripping ribs to slide in the limiting storage grooves; according to the steering adjusting wheel, the foldable ground gripping ribs are separated from the outer wall of the steering adjusting wheel, so that the ground gripping force is enhanced by utilizing an anti-skid structure formed by the foldable ground gripping ribs which are arranged at equal angles and protrude outwards, the smooth proceeding of climbing movement is facilitated, and when the steering adjusting wheel runs on the flat ground, the micro reversible air pump reversely drives the anti-explosion air bag layer to exhaust air, so that the anti-skid effect is achieved. And a user can conveniently push the storable ground gripping ribs into the limiting storage grooves for storage, so that the tread is recovered to be smooth, and the flat ground rolling resistance is reduced.

A determining device 200 detects i) the road condition of a route on which a vehicle powered by electrical energy from a fuel cell 110 and a secondary battery 120 plans to travel, and ii) the weight of the vehicle at a current position. The determining device 200 i) identifies a rolling resistance coefficient corresponding to the detected road condition by referring to a data table in which each of a multitude of road conditions is associated with a rolling resistance coefficient when the vehicle's wheels roll on the road with that road condition, and ii) determines the electrical energy required for the vehicle to travel along the route by using a rolling resistance calculated as the product of the identified rolling resistance coefficient and the detected weight.

This invention provides a tire that suppresses deterioration of rolling resistance, reduces electrical resistance, suppresses shrinkage of the unvulcanized rubber in the tread area that contacts the road surface, and improves high-speed durability. [Solution] The tire of the embodiment comprises Earth Red rubber 14, Cap Tread rubber 12 and Tie rubber 10. Earth Red rubber 14 has a specific surface area [m²] of carbon black CTAB adsorption. 2 The specific surface area × mass fraction (ET), which is the product of the [ / g] and mass fraction, is 20 to 40. The cap tread rubber 12 contains 80 parts by mass or more of silica per 100 parts by mass of rubber components, and the ratio of the mass of silica to the mass of filler is 90% or more. The tie rubber 10 is positioned on the inside of the tire relative to the carcass 4 and extends along the carcass 4 between a pair of bead cores 5. The specific surface area of ​​carbon black (A) and (B) of the tie rubber 10 with adsorption [m² 2 The product of [ / g] and mass fraction is between 20 and 40.

The present invention relates to a self-supporting tyre (100) for motor vehicles comprising sidewall reinforcing inserts (113A, 113B) having different stiffness. In particular, the stiffness of the sidewall reinforcing inserts on the sides of the tyre which are most stressed during running is less than the stiffness of the sidewall reinforcing inserts on the sides which are less stressed. The tyre of the present invention shows a reduced rolling resistance and better comfort during normal running and an unexpectedly increased mileage in run-flat running.

The utility model provides a starlike sleeve with an annular groove, which relates to the technical field of mechanical transmission parts and comprises a starlike sleeve body, a shaft hole is arranged in the middle of the starlike sleeve body, steel ball cavities which are uniformly distributed in a surrounding manner are arranged on the outer end face of the starlike sleeve body, and an inner annular groove is arranged on the wall face of the shaft hole. An oil injection hole is formed in the surface of the starlike sleeve body, an annular oil storage cavity is formed in the starlike sleeve body, and a dustproof plug is inserted into the oil injection hole. The inner ring groove formed in the wall face of the shaft hole and the communicating hole in the wall face of the inner ring groove are communicated with the inner annular oil storage cavity, lubricating oil in the oil storage cavity can evenly flow to the contact portion of the shaft hole and a shaft, the oil guide groove formed in the side wall of the steel ball cavity is communicated with the oil storage cavity, lubrication is provided for rolling of steel balls, rolling resistance is reduced, and the service life of the bearing is prolonged. Therefore, a good lubricating effect can be achieved, friction and abrasion are reduced, and the service life of equipment is prolonged.

The utility model relates to a continuous type unloading spiral sorting equipment, include: stand, the double spiral sorting groove is connected around on stand, and the slope angle of double spiral sorting groove is 10~20 DEG. Advantageous effect is: material falls into double spiral sorting groove from the feed port of double spiral sorting groove even, and the centrifugal force and gravity component are produced along with spiral rotation, and the qualified spherical material is along the inside of double spiral sorting groove stable slide to the qualified product export because of even weight, small rolling resistance, and the abnormal / defective material falls into the substandard product collection groove because of the off-center of gravity or the rough surface, and the rolling track expands outward, and the continuous type unloading spiral sorting equipment can effectively sort the spherical material of 1.2mm~1.6mm of particle size, and the sorting precision is high, and the screening rate of abnormal / defective material is greater than or equal to 98%, and the mis-screening rate is less than 1.5%, and the continuous operation capacity is strong, and the energy consumption is low.

The utility model provides a tire with low rolling resistance, which belongs to the technical field of tires and comprises a tread, a tire body and a belted layer arranged between the tread and the tire body, a central pattern groove extending along the circumferential direction of the tire is arranged in the middle area of the tread, and a plurality of transverse pattern grooves are arranged in tire shoulder areas on two sides of the tread. And the depth H1 of the transverse pattern grooves and the depth H2 of the central pattern grooves meet the equation that H2-H1 is equal to 2-3mm. The low-rolling-resistance tire has the characteristics that the weight of the tire is reduced, the rolling resistance is reduced, the heat dissipation is improved, the ageing resistance is improved, and the service life of the tire is prolonged.

The invention relates to a vehicle control method and device, a vehicle and a medium, and relates to the technical field of vehicle control. The control method comprises the steps that correction parameters are determined according to the ratio of first sliding resistance of a reference vehicle in the sliding process in the state that energy recovery is stopped and second sliding resistance of a target vehicle in the sliding process in the state that energy recovery is stopped; correcting a first recovery torque of the reference vehicle according to the correction parameter to obtain a second recovery torque; determining a target recovery torque of the target vehicle according to the second recovery torque; and performing energy recovery control on the target vehicle according to the target recovery torque. According to the technical scheme, the energy utilization rate of the vehicle can be increased.

The invention relates to a driving wheel tire of a load-carrying vehicle, in particular to a driving wheel single-guide oil-saving tread pattern special for middle and long distance. A driving wheel single-guide oil-saving tread pattern special for middle and long distance comprises a zigzag central pattern groove located in a middle tread, and is characterized in that zigzag crown pattern grooves are evenly distributed on the outer side of the central pattern groove, and zigzag tread pattern grooves are evenly distributed on the outer sides of the two crown pattern grooves; the tread between the central pattern groove and the crown pattern groove is provided with a pattern rib A; compared with the prior art, the tire has the technical effects that the tire is provided with high-saturation and uniform small mahjong block pattern design, so that the mileage of the tire can be increased by 5%-8%, the rolling resistance performance of the tire can be improved by 8%-10%, and the driving force is stronger.

Vehicle pneumatic tire (1) for a light vehicle, preferably a bicycle, with a tire carcass comprising exactly a first carcass layer (6) in the inner part of the tire at the zenith and a second carcass layer (7), each of which terminates in a carcass high point (61,71) under the tread. The goal is to create a tire that offers lower rolling resistance and improved adaptation to the surface, while simultaneously maintaining high puncture protection and advantageous cornering behavior under high lateral forces. This is achieved by the fact that the first two carcass uplifts (61) on the tire half on which they are guided over the respective sidewall (3) end in the axially outer 20% of the axial extent (8) of the tread (2), and that the second carcass uplifts (71) coming from the sidewall extend within the axial extent (8) of the tread beyond the first carcass uplift (61) which is guided over the sidewall on the same tire half as the respective second carcass uplift (71).

The utility model relates to the technical field of farming equipment, in particular to a multifunctional radish farming machine which comprises a machine body, a walking device, a soil loosening mechanism, a seeding mechanism, a film mulching mechanism and a control system. The walking device adopts anti-skid rubber wheels and has high wear resistance, low rolling resistance and excellent road holding force; the soil loosening mechanism realizes efficient soil loosening by driving blades through a motor; the sowing mechanism uses an air pump to accurately put seeds; and the film mulching mechanism completes film mulching through a film pressing wheel and a soil covering blade. According to the control system, STM32F103C8T6 is used as a main control chip, and intelligent operation of equipment is achieved. The utility model solves the problems of low manual seeding efficiency and non-uniform machine seeding, improves the farming operation efficiency and quality, is energy-saving and environment-friendly, and is suitable for various farming scenes.

The invention relates to the technical field of tire rubber manufacturing, and discloses a tread rubber composition, a preparation method thereof and a new energy automobile tire. According to the tread rubber composition disclosed by the invention, two kinds of white carbon black with different specific surface areas are adopted, and when the ratio of the products of the specific surface areas and the parts of the white carbon black with the high specific surface area and the white carbon black with the low specific surface area meets 3.0-10.0 in the specified addition parts, the wear resistance, the wet grip performance and the rolling resistance of the rubber composition can be effectively and synergistically improved; and the optimization of the comprehensive performance is obtained.