290results about How to "Improve traction performance" patented technology

Nine-speed transmissions are provided that include four planetary gear sets having six torque-transmitting mechanisms and various fixed interconnections to provide nine forward speed ratios and a reverse speed ratio. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another of the planetary gear members. The six torque-transmitting mechanisms are operated in combinations of two. Reduced component speeds and improved ratios are achieved.

An electrically-variable transmission for use with an engine includes an input member configured for operative interconnection with the engine, an output member, and a stationary member. First and second motor / generators, a first and a second planetary gear set each having respective first, second, and third members are included. A first, a second, and a third selectively engagable torque-transmitting mechanism are included. The input member is connectable for common rotation with the first member of the first planetary gear set either continuously or selectively by engagement of the third torque-transmitting mechanism. The output member is connected for common rotation with the first member of the second planetary gear set. The motor / generators are controllable and the torque-transmitting mechanisms are selectively engagable to establish at least one electric-only mode, a series mode, an output-split mode, and at least one neutral mode.

A track spiked shoe or a running shoe has a thin-plate-like outsole formed of a hard synthetic resin and having a plurality of cleats or studs on a ground contact surface thereof. The outsole has a first and second bulge each protruding downwardly toward the ground surface. The first bulge is located at a position that corresponds to a thenar eminence of a foot of a shoe wearer and the second bulge at a position that corresponds to a hypothenar eminence of a foot of a shoe wearer. The first and second bulge each has a configuration that conforms to a shape of a forefoot portion of a foot that has been flexed. Some of the cleats are provided on a convexly curved surface of the first and second bulge.

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.

A non directional pneumatic tire is provided for an agricultural irrigation system. The tire includes first and second side walls and a radially outer wall defining an internal inflation chamber. A non directional tread pattern is defined on the tire and includes a plurality of longitudinal protrusions positioned substantially parallel to a rotational axis of the tire. The longitudinal protrusions are arranged in first and second rows extending from the first and second side walls toward and across the equatorial plane of the tire. The longitudinal protrusions of the first and second rows circumferentially alternate with each other and there is a circumferential spacing between adjacent longitudinal protrusions at the equatorial plane so that no portion of one longitudinal protrusion circumferentially coincides with or overlaps another.

A trailer spotter vehicle having a seat and a control console which are relatively rotatable with respect to the vehicle frame, and a differential drive system which permits the vehicle to turn within a very small turning radius. The rotatable seat and control console allow the operator to steer the vehicle without having to substantially turn their body or use mirrors to observe the path of the vehicle. To drive the vehicle in a forward direction, hydraulic pumps transmit pressurized hydraulic fluid to the trailer spotter wheels to rotate them in a first direction. In order to drive the vehicle in reverse, the flow of hydraulic fluid to the wheels is reversed to rotate the wheels in an opposite direction. To pivot the vehicle, the first wheel is driven in the first direction and the second wheel is driven in the opposite direction.

A fin deployment system for missiles and munitions that deploys and activates straight flat fins for roll control authority. The fin deployment system employs numerous design features, among which are the following: A wrap-around fin concept generates space-savings within a projectile body whereby the fins are arranged in a wrapped configuration around a boomtail structure. The fins may be constructed of a super-elastic material; the system eliminates mechanical means of deploying the wrapped fins, eliminating the need for springs to deploy the fins. The fin deployment achieves substantial space savings for increasing the onboard towing capacity of electronic packaging or lethality in the missiles and munitions systems, while at the same time providing a good roll control authority during flight by enabling a straight fin deployment resulting from the use of super-elastic materials.

Systems and methods for providing light therapy traction to a patient. A light therapy device and a traction mechanism provide concurrent, alternating and / or repetitive treatment to a patient. The light therapy device includes one or more light sources configured to deliver light to a patient. The traction mechanism is configured to provide selective separation to a particular location the patient's body, such as a location of the patient's vertebrae. In some embodiments, the light therapy and traction are performed simultaneously. In other embodiments, the light therapy and lumbar traction are performed in treatment cycles to the patient. Embodiments of the present invention embrace the application of light therapy prior to, during, and / or after a cervical and / or lumbar traction treatment.

The invention discloses a self-adaption sand ground biomimetic mechanical foot, and belongs to a foot type robot mainly applied to walking on sand ground. The self-adaption sand ground biomimetic mechanical foot consists of a support frame, a linear motor, a connecting element, a first foot toe, a second foot toe, an elastic fabric, a buffer mechanism and the like, wherein the connecting element consists of a first connecting element, a second connecting element, a pin shaft and a screw stud; the buffer mechanism consists of a support frame, a foot sole, a spring and a connecting post, and is used for simulating an ostrich tarsometatarsus joint to achieve the buffer and shock absorption effects. The self-adaption sand ground biomimetic mechanical foot can achieve the beneficial effects that when the robot walks on the sand ground, the two toes are separated when the foot touches the ground; the elastic fabric spreads, so that the ground contact area is increased; the stability of the robot is improved; when the foot is lifted up, the two toes are closed and are overlapped for a certain area; the elastic fabric contracts; the stress area in the moving process is reduced. Meanwhile, the bottom of the first foot toe and the bottom of the second foot toe are provided with groove structures matched with the elastic fabric; the sand fixing and current limiting functions can be realized; the gait stability and the traction performance of the foot type robot can be improved.

The invention relates to a tractor intelligent control method and an intelligent control system. A corresponding signal is collected by a sensor to obtain an existing operating state of a tractor, all parameters are calculated, analyzed and judged by a controller on the basis, and after information is processed, control signals are transmitted to a stepping motor and a high-speed electromagnetic valve so as to enable a main clutch, a PTO clutch, and a brake pedal executing mechanism, an engine throttle draw bar executing mechanism, a hydraulic hanging mechanism and the like to conduct motion to prevent a driving wheel of the tractor from excessive trackslip and overload of a transmission system, ensure good comfort, fuel economy and traction, and prolong service life of the transmission system and tires of the tractor.

This invention discloses one line sensor motor control method, which gets line sensor motor initial magnetic linkage real value and linkage rate according to the input voltage of line sensor motor, wherein, it gets line sensor motor stator magnetic linkage range reference value and frequency value through collecting line sensor motor real speed; then it combines initial linkage aim shape to determine property motor initial voltage space vector and linkage frequency for the reference values.

To provide a tread pattern of a pneumatic tire for heavy load enhancing both low noise performance and on-snow performance. Longitudinal length L4C of a central block, longitudinal length L4M of an intermediate block and longitudinal length L4S of an outer block, i.e., circumferential distances of respective tires between the most projecting end points on both sides of a tire circumferential direction of the central, intermediate and outer blocks (4) are defined; and lateral length W4C of the central block, lateral length W4M of the intermediate block and lateral length W4S of the outer block, i.e., tire axial distances between the most projective terminals at both sides in a tire axial direction of the respective central, intermediate and outer blocks (4) are defined. A longitudinal length ratio of the respective blocks is made to (L4S / W4S)<(L4M / W4M)<(L4c / W4C), 1.50 B60C 11 / 117 4 15 2 2006 / 7 / 31 1907738 2007 / 2 / 7 100473547 2009 / 4 / 1 2009 / 4 / 1 2009 / 4 / 1 Sumitomo Rubber Industries, Ltd. Japan Takahashi Nobugo xu qian luo yunpo 11227 Japan 2005 / 8 / 4 2005-226922

The invention discloses a heavy duty pneumatic tire. Both of the center wear and heel-and-toe wear can be improved to high levels. A tread portion 2 is divided into a pair of crown land portions 4A, a pair of middle land portions 4B and a pair of shoulder land portions 4C by center main grooves 3A, middle main grooves 3B, and shoulder main grooves 3C. The crown land portions 4A, the middle land portions 4B and the shoulder land portions 4C are divided into crown blocks 8A, middle blocks 8B and shoulder blocks 8C by crown axial grooves 7A, middle axial grooves 7B and shoulder axial grooves 7C. The crown axial groove 7A, the middle axial groove 7B and the shoulder axial groove 7C are provided with a crown tie bar 16A, a middle tie bar 16B and a shoulder tie bar 16C, respectively. The maximum width Wcr of the crown land portion, the maximum width Wmi of the middle land portion, and the maximum width Wsh of the shoulder land portion are set in the preset range.

The invention discloses a bionic mechanical leg imitating the motion function characteristic of an ostrich hind limb. The mechanical leg comprises a body, a hip joint motion mechanism, a knee joint motion mechanism and an ankle joint motion mechanism. The hip joint motion mechanism is composed of a motor and a crank-rocker mechanism, wherein the crank-rocker mechanism comprises a crank, a femur and a connecting rod. The knee joint motion mechanism comprises the femur, a first spring, a tibia, a metatarsus, a brake cable, a lower fibula, a second spring, an air cylinder and an upper fibula. The ankle joint motion mechanism comprises the metatarsus, a first apotelus bone, a second apotelus bone, a third apotelus bone, a third torsional spring, a second torsional spring and a first torsional spring. The ostrich hind limb capable of efficiently moving serves as the bionic prototype, through combination of testing on hind limb motion parameters during running of an ostrich and biological anatomic analysis, the mechanical leg imitating the ostrich hind limb is obtained through optimization design according to the tendon-bone and muscle-tendon interaction mechanism of the ostrich, and the mechanical leg is simple in structure, safe, reliable, low in vibration, and capable of efficiently saving energy.

The invention discloses an off-road vehicle wheel free of inflation. The off-road vehicle wheel free of inflation is composed of a flexible rim, elastic spokes and a rigid hub. The off-road vehicle wheel free of inflation is normally installed on an off-road vehicle. When the off-road vehicle runs, the off-road vehicle wheel free of inflation bears the action of a complicated road surface, and the flexible rim and the elastic spokes generate elastic deformation under the action of external force. When the external force is eliminated, the flexible rim and the elastic spokes recover. In this way, the external force is effectively buffered, shock of the vehicle is reduced, and the bearing capacity of the vehicle is improved. Through a polyurethane interlayer of a hexagonal structure similar to a honeycomb, the firmness of the wheel is improved, a load is evenly distributed, and therefore the environmental adaptability and the safety are improved. A rubber layer is provided with rubber wheel thorns, and therefore the traction performance and the adhesion performance of the vehicle are improved. The off-road vehicle wheel free of inflation is simple in structure, convenient to replace, high in applicability and suitable for various complicated road surfaces, air leakage and burst are avoided, the shock of the vehicle can be effectively reduced, the bearing capacity and the buffering capacity of a vehicle body are improved, the environment adaptability and the safety are improved, and the traction performance and the adhesion performance of the vehicle are improved.

Provided is a pneumatic tire having snow performances which are capable of being enhanced without sacrificing its running performance on dry road surfaces. A pneumatic tire of the invention includes two first main grooves, a plurality lateral grooves and a plurality of sipes in a tread part. In the pneumatic tire, a groove wall surface, of each first main groove, closer to a tire equatorial line is formed so as to cyclically repeat, in the tire circumferential direction, a change in an inclination angle of the groove wall surface to a direction normal to a tread, the change being a gradual increase from a minimum value of 0 DEG to 15 DEG to a maximum value of 15 DEG to 45 DEG. In places where the inclination angel of the groove wall surface, of the first main groove, closer to the tire equatorial line, is at its maximum, no lateral grooves communicate with the first main groove, and in the places, the other groove wall surface, of the first main groove, closer to a corresponding contact end extends uninterruptedly.

An implanted tongue pulling device including a pull plate, a pull line, a retractor and a method thereof are provided. The tongue pulling device is implanted in the mandible and tongue of a human body, respectively, for tightening the tongue dorsum and / or the tongue base for treating obstructive sleep apnea / hypopnea syndrome (OSAHS). At least three pull lines are used for positioning the pull plate, which is a flat object implanted beneath the tongue dorsum and / or the mucous membrane of the tongue base and includes through holes for the growth of tissues and pull line fixing mechanisms. The pull line includes a draw line and a sleeve. The retractor includes a casing, a control switch and a pull line fixing device mounted on the casing. A patient after surgery can adjust the tightening extent of the implanted tongue pulling device by pressing the skin outside the control switch, thereby preventing OSAHS.

The invention discloses a tread pattern structure of pneumatic tires for two-wheelers. Each tire tread consists of a plurality of tread pattern units arranged alternately and symmetrically along the circumferential direction of the corresponding pneumatic tire, wherein each of the tread pattern units comprises a primary angle groove and a subsidiary angle groove; each primary angle groove extends from a tire equatorial plane towards a tire shoulder, and is formed by connecting a wide primary angle groove of which the opening faces the inside of the axial direction with a narrow primary tread of which the opening faces the outside of the axial direction; and each subsidiary angle groove is arranged between the two corresponding primary angle grooves of two tread pattern units adjacent to each other at the same side of the tire equatorial plane, and is formed by connecting a wide subsidiary angle groove of which the opening faces the outside of the axial direction with a narrow subsidiary tread of which the opening faces the inside of the axial direction. The openings of each primary angle groove and the corresponding subsidiary angle groove at the same side are alternately arranged in the opposite direction, so as to ensure good abrasion resistance performance and drainage performance of the tire tread and improve the traction performance of the tire tread of the pneumatic tires at the same time.

An off-road motorcycle tire having a block pattern comprising a plurality of blocks 11 defined by tread grooves 10, each block 11 having a circumferential profile 16 of top surface 12 in the form of a straight line or a circular arc having a radius Ra of curvature of at least 500 mm, in which the circumferential profile denotes a profile in the circumferential section which passes through the centroid G of the top surface 12 and is parallel to the tire equatorial plane Cc. According to the invention, the ground contact pressure at the periphery of the top surface of blocks 11 is prevented from lowering to enhance the edge effect.

The invention discloses a wear-resisting tire. The wear-resisting tire is prepared from, by weight, 16-18 parts of natural rubber, 15-18 parts of EPDM rubber, 10-15 parts of isoprene rubber, 1-3 parts of butadiene rubber, 5-10 parts of butadiene styrene rubber, 3-5 parts of nano-silica, 1-3 parts of nano-zirconia, 1-3 parts of polyether polyol, 2-5 parts of dibutyl phthalate, 1-3 parts of 2-ethylhexyl epoxystearate, 3-6 parts of zinc oxide, 2-5 parts of zinc borate, 3-6 parts of stearic acid, 2-5 parts of fortifier and 0.5-1 part of alkoxy type titanate coupling agent. The wear-resisting tire has high bearing performance, traction performance and buffer performance, and has high wear resistance and surrendering resistance and low rolling resistance and heat generation.

When determining that a vehicle is not skidding, the ECU carries out tight corner control if vehicle speed is smaller than the upper limit value of the vehicle speed range corresponding to the starting state of the vehicle and the steering wheel turning angle of a steering wheel is greater than or equal to the minimum value of the steering wheel turning angle at which the tight corner braking phenomenon may occur. When determining that the vehicle is skidding, the ECU inhibits the tight corner control even if the vehicle speed is smaller than the upper limit value and the steering wheel turning angle is greater than or equal to the minimum value of the steering wheel turning angle at which the tight corner braking phenomenon may occur.

The invention discloses a material strip granulation production process. The material strip granulation production process comprises the following steps: step 1, processing plastic raw materials by a material strip extruder and extruding plastic material strips; step 2, conveying the plastic material strips to a cooling water tank of material strip traction equipment to be cooled, and conveying the cooled plastic material strips by matching of a first section of conveying crawler belt and rotary rollers; step 3, conveying the plastic material strips to a second section of conveying crawler belt in an inclined state in the material strip traction equipment and carrying out air drying treatment on the plastic material strips by an air drying device; step 4, conveying the plastic material strips which are dried by air into a plate slot in the material strip traction equipment, and reshaping and conveying the plastic material strips by the matching of the second section of conveying crawler belt and the rotary rollers; and step 5, carrying out granulation treatment on the plastic material strips by a granulator. A complete stainless steel net crawler belt is composed of the first section of conveying crawler belt, the second section of conveying crawler belt and a third section of conveying crawler belt; the widths of holes in the stainless steel net crawler belt is less than 2mm; the stainless steel net crawler belt, the material strip extruder and the granulator are synchronously operated at an uniform operating speed.

The invention discloses a reconfigurable high-efficiency high-linearity broadband power amplifying method and an amplifier. One output end of an unequal Wilkinson power divider in the amplifier is connected with a carrier power amplifier, and the other output end of the unequal Wilkinson power divider is connected with a peak power amplifier; the carrier power amplifier is connected with one input end of a power combiner through a 1 / 4 wave length impedance transformer; the output end of the peak power amplifier is connected with the other input end of the power combiner; the input end of the power combiner is connected with a load modulation network; the load modulation network is characterized in that a section of 1 / 4 wave length transmission line is connected in parallel to the tail of the conventional 1 / 4 wave length transmission line; and the bandwidth of the conventional Doherty is broadened. According to the amplifying method and the amplifier, drifting of 'effective' load impedance along with operating frequency can be inhibited greatly, so that the broadband of the Doherty amplifier is improved, which provides guarantee for improving the overall broadband of the Doherty amplifier.

A tire having a tread has at least one tread element with a multidimensional sipe formed in the tread element. The sipe has a width W, a depth Ds, and an effective length Le. The sipe has a first radially outermost portion with a constant effective length Le, a second transitional portion with a gradually increasing effective length Le, and a third radially innermost portion having a constant effective length Le greater than the effective length of the first portion.

In a pneumatic tire for traveling on an off road, including a tread pattern in which a plurality of blocks are formed by at least three vertical grooves extending along a tire circumferential direction and a lateral groove intersecting the vertical grooves, each of the lateral groove arranged among the three vertical grooves and the vertical groove arranged in a middest portion has a groove wall surface forming a step portion, and a projecting stripe continuing approximately at an identical height is provided at a whole of each groove bottom thereof.

A tread surface the tire rotational direction of which is specified in one direction includes a first main see-through groove extending in the circumferential direction of the tire in a region of from 4% to 15% of the tire ground contact width from the tire equatorial plane toward each of left and right sides. Rug grooves obliquely extend from the first main see-through grooves toward the outer sides of the tire in the reverse rotational direction of the tire so as to communicate with the tire ground contact ends, the rug grooves being disposed at prescribed intervals in the circumferential direction of the tire. Blocks are defined by the rug grooves and the first main see-through grooves. V-shaped transverse grooves are disposed between the first main see-through grooves at prescribed intervals in the circumferential direction of the tire, the transverse grooves having vertexes that face to the reverse rotational direction of the tire. Blocks are defined by the transverse grooves and the first main see-through grooves. The groove width W of each transverse groove measured in the circumferential direction of the tire is ranged from 0.1 L to 0.25 L with respect to the tire circumferential length L of the block adjacent the transverse groove. The ratio ACA / GCA of the total ground contact area ACA of the blocks to the ground contact area GCA of the entire tread surface is in the range of 55% to 75%.