CN100406279C - Tread pattern for car tire - Google Patents
Tread pattern for car tire Download PDFInfo
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- CN100406279C CN100406279C CNB028077008A CN02807700A CN100406279C CN 100406279 C CN100406279 C CN 100406279C CN B028077008 A CNB028077008 A CN B028077008A CN 02807700 A CN02807700 A CN 02807700A CN 100406279 C CN100406279 C CN 100406279C
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
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Abstract
A tyre (1) for a motor car comprises a tread (2) having at least one circumferential row (9; 10; 11; 209; 211) of blocks (13; 14; 15; 213; 215) located between a first and second circumferential groove (3, 4; 5, 4; 6, 5); each block (13; 14; 15; 213; 215) is delimited by a section (103; 105; 106) of the first circumferential groove (3; 5; 6) and by a first and a second transverse groove (16, 18; 28, 26; 38, 36; 216, 218; 236, 238) which converge at a common vertex (19; 29; 39; 219; 239) spaced and separated from the second circumferential groove (4; 5) by means of a continuous circumferential tread rib (20, 24; 30); the second transverse groove (18; 26; 36; 218; 236) which delimits a block (13; 14; 15; 213) is separated from a first transverse groove (16; 28; 38; 216; 238) which delimits an immediately following block (13; 14; 15; 213; 215) by a solid tread portion (21; 25; 31; 221; 231).
Description
Technical field
The present invention relates to motor tire, particularly relate to high-performing car.The tread blocks (block) that has on the tire surface that tire has (tread) by being defined along the circumferential groove of longitudinal direction extension and the transverse groove that extends along axial direction basically basically, has the motor tire of this tire surface, and is known.Tread blocks by due to the above-mentioned groove intersection forms with various suitable design-calculated shapes, and is arranged to the circumferential row of adjacency, and each tread blocks ranking is between continuous circumferential groove.
Background technology
Circumferential groove can influence the directional performance of tire and the stability of advancing, and this kind performance and stability and side direction (slip) thrust that is parallel to tire axis of rotation have relation.
Transverse groove then can influence the tractive property of tire, promptly tire sends tangential thrust to the ground-surface ability efficiently, and this kind thrust is parallel to direct of travel during car acceleration and braking.
Circumference and horizontal groove, can also influence the draining that automobile is traveling in the zone that contacts with the road surface during the moist road surface.
Under any circumstance, exist groove horizontal and circumference, all can be influential to the rolling noise of tire.In fact, producing the one of the main reasons of noise, is exactly the continual bump of edge road pavement of tread blocks.
Produce the Another reason of noise, be that when tread blocks entered and leave contact with the road surface regional, the tread blocks on the road surface had been subjected to towing.This towing comes down to cause owing to tire surface distortion, and this situation had both occurred in that tire flattens and when being resisted against on the road surface, also occurs in tire and leaves and contact with ground-surface and when returning under its inflated condition.
When tire surface begins contact and leaves when contact with ground-surface and be out of shape, also make those grooves that defining tread blocks produce periodic volume change, and make and be absorbed in the interior air of groove and the cyclic activity that compresses and expand finally occurs.These compressions of air and the phenomenon of expansion have increased the rolling noise of tire.
Purpose is to limit the various measures of rolling noise, and is known.One of these measures, just provide tread blocks with different longitudinal sizes, this is to take two or more different amount of tapers-promptly so-called " gradient order " to reach, thereby as much as possible lack homogeneity on the feasible tire surface that circumferentially extends in the circumference sequence.Its purpose be exactly since tread blocks under broad spectrum, come because of bump and the sound equipment energy dissipation that produced of towing, to avoid this concentration of energy on specific frequency and produce annoying noise.
No. 623 measured tire noise of ISO/TC/SC according to standard when having surpassed the following limit, just is considered to unacceptable:
Tyre width≤145 72dB (A)
Tyre width＞145 and≤165 73dB (A)
Tyre width＞165 and≤185 74dB (A)
Tyre width＞185 and≤215 75dB (A)
Tyre width＞215 76dB (A)
Tire noise is such problem, has influenced the performances such as direction, traction and draining of tire conversely because some measure is intended to reduce noise, and this problem is difficult to solve.
For example, in order to improve drainage performance, transverse groove should be precipitous, and promptly these grooves should be to have little inclination (inclination) with respect to circumferential groove.On the other hand, advance on dry roads and the homogeneity of response time in order to improve, it is bigger that transverse groove should the inclination angle with respect to circumferential groove, promptly should be in fact perpendicular with longitudinal slot.Yet very the bevelled transverse groove but can aggravate the rolling noise of tire.
In addition, frequency is less than 1500 hertz or particularly less than 1000 hertz sound, be more prone to hear outside car in the car internal ratio, and frequency is loud more significantly outside car greater than 1500 hertz sound.
Therefore, outside Che Nei and car, just can not obtain low-level noise, and will all to reach best possible compromise in each case also be difficult.
Described a kind of tire EP-812709 number, the tire surface that this kind tire is had comprises two zones, and wherein at least one zone has a plurality of bevelled major troughs, and each major trough comprises the section of an orientated at steep inclinations, and comprises the section of a slight inclination.The side direction sideband in these two zones has the auxiliary tank of orientated at steep inclinations, this groove and two adjacency, bevelled major trough communications and liaison, and auxiliary tank is slight inclination, it two adjacency, between the bevelled major trough.
In first embodiment, the bevelled major trough extends from the circumferential groove near tire equatorial plane (equatorialplane), and simultaneously, in a second embodiment, this major trough has closed bottom (blind bottom).
In the 3rd embodiment, orientated at steep inclinations section two adjacency, the bevelled major trough is connected by narrow transverse groove.
Described a kind of tire EP-867310 number, the tread blocks that this kind tire is included is by means of a plurality of circumferential grooves and a plurality of directional inclination groove and partly formed by tire surface.At least some directional inclination grooves are to extend from the circumferential groove near tire equatorial plane, and extend towards an end of tire surface and ground contact area.Each tread blocks has angled part, and this part forms 10 ° to 60 ° the acute angle that is limited by circumferential groove and directional inclination groove.The surface of the angled part of tread blocks, along vertically from this surperficial tapered distal end 10 to 30 mm distance of cutting sth. askew, thereby, change towards big width segments gradually.
In the tire surface of above-mentioned two patents, every tipper is all defining the tread blocks of a tread blocks and an adjacency on the circumference.That is to say, every directional inclination groove all separately two in connection with coherent tread blocks, and be that they are shared.
The result is, above-mentioned two kinds of tire surface all have the falculate in abutting connection with tread blocks of circumferential row, and this tread blocks is only separated along the tread blocks of circumferencial direction and in abutting connection with the gradient of the length sum of tipper by equaling.
JP 11-334317A discloses a kind of air-inflation meridian tire, has the super pendulum resistance that gets rid of in this tire the travelling on forming the road surface of recess.According to this patent document, tire has the reduction part that is located on the middle section, it comprises the tire equator face, the ground connection width that has in the following ground state of tread portion 30%, promptly, the tire that is filled with corresponding to the air pressure of maximum gross ability vertically is pressed on the flat board, and load carrying ability is equivalent to 70% of maximum gross ability.
Summary of the invention
Yet inventor of the present invention recognizes, the existence of a large amount of tippers can cause occurring a longitudinal slot, and these tippers are layouts close to each other, and this rolling noise to tire has negative effect.
One object of the present invention is to provide a kind of tire, and this tire combines Che Nei and the outer low noise of car with the excellent in performance of travelling with humidity and dry pavement.
The present invention relates to the used tire of automobile, this tire has equatorial plane, and comprises a tire surface and two shoulders, and above-mentioned tire surface has first and second circumferential grooves; First and second transverse grooves, form at least one tread blocks circumferential row, this circumferential row is between above-mentioned first and second circumferential groove, each above-mentioned tread blocks defines by a section and above-mentioned first and second transverse grooves of above-mentioned first circumferential groove, described transverse groove extends from above-mentioned first circumferential groove, and polymerization is in sentencing the formation tip with the spaced shared summit of above-mentioned second circumferential groove, separate by continuous circumference tire surface flank and above-mentioned second circumferential groove on this shared summit, defining above-mentioned second transverse groove of tread blocks separates by the band tyre face portion and first transverse groove that extend to above-mentioned circumference flank from above-mentioned first circumferential groove, thereby form a mono-object with above-mentioned circumference flank, and above-mentioned tread blocks and tread blocks following closely are spaced apart from each other.
Best at least one in above-mentioned first and second transverse grooves, along above-mentioned shared summit on above-mentioned this direction of first circumferential groove, width increases.
In one embodiment, at least one in above-mentioned first and second transverse grooves is falculate.
Preferably at least one in above-mentioned first and second transverse grooves has center line, and this center line is formed by the arc of a circumference, and this arc has predetermined radius of curvature.
Advantageously, first section that above-mentioned center line had, the direction of this section is basically parallel to above-mentioned equatorial plane, and second section has the predetermined inclination with respect to above-mentioned first circumferential groove, and the jointing that it had links together this first and second section.
In another embodiment, in above-mentioned first and second transverse grooves at least one, has first section, the direction of this section is basically parallel to above-mentioned equatorial plane, and second section has the predetermined inclination with respect to above-mentioned first circumferential groove, and the jointing that it had links together this first and second section.
Advantageously, each tread blocks in the above-mentioned delegation at least tread blocks, it is shaped as the shark fin-shaped.
The best shared summit of first and second transverse grooves of above-mentioned delegation at least tread blocks, have in a longitudinal direction identical towards.
Usually, above-mentioned tire surface has central delegation circumferential tread piece, and the circumferential tread piece of first and second sides row.
In one embodiment, the shared summit of above-mentioned first side tread blocks row's above-mentioned first and second transverse grooves, it is towards opposite with above-mentioned first and second transverse grooves of above-mentioned central delegation and second side delegation tread blocks.
In another embodiment, the shared summit of above-mentioned first and second transverse grooves of above-mentioned the third line tread blocks, have identical towards.
Usually, above-mentioned tire surface has the tread blocks of second side circumferential row, and two central circumference flanks, and this flank is separated with the circumferential groove of centre again.
Best above-mentioned first side tread blocks row's shared summit, its towards with above-mentioned second side tread blocks row towards opposite.
Advantageously, at least one row's above-mentioned first and second transverse grooves extend to outside cooresponding first circumferential groove, and extend in the axial inner zone of an above-mentioned shoulder among the above-mentioned first and second side circumferential tread pieces row.
Usually, one of above-mentioned at least shoulder in axial perimeter, has extra transverse groove antithetical phrase, and these transverse grooves cover towards a shared summit.
Advantageously, the transverse groove of above-mentioned extra covering is separated itself and above-mentioned first circumferential groove by the solid section of elastomeric material.
Usually, the transverse groove of above-mentioned extra covering extends from above-mentioned first circumferential groove.
Advantageously, the axial inner zone of shoulder, its blank/solid ratio, less than the other blank/solid ratio in the axial inner zone of that shoulder, and when above-mentioned mounting of tyre was on above-mentioned automobile, this last interior zone was positioned at the outside of this automobile.
Tire according to the invention is guaranteed firmly to fit on the moist road surface, and the value of its noise level all is low outside Che Nei and car, and its comfortable and good control is high-caliber on dry pavement.
Especially under moist ground-surface condition, it is poor to fit in the case, tire surface according to the invention, do not influencing road holding, even under the situation of running at high speed, also can guarantee both along longitudinal direction, also along the laterally good draining of (side direction) direction.This performance is to do the test (aquaplaning test) of sliding to prove around curved object, is doing this kind test period, has measured sidepiece acceleration/accel and maximum speed that tire was reached before forfeiture is fitted.When under very moist condition, when tire according to the invention is advanced along the road curve section, to come compared with the tire of doing contrast, it has kept desirable applying situation for a long time under speed strengthens.
In addition, at the sidepiece period of acceleration, maximum acceleration figure and maximum speed value on moist road surface all have obvious improvement.
So tire according to the invention, and the automobile that assembles this tire have preferred properties on moist road surface, can guarantee to travel saferly.
Highly fit between tire and the moist road surface, can guarantee that also stopping distance is shorter, therefore just improved the performance of the automobile that has assembled this kind tire.
In this specification sheets and the claims of enclosing, term " groove " is appreciated that to referring to its width and is not less than 1.5 millimeters depressed part.
Description of drawings
Characteristic performance of the present invention and advantage, now just in non-limiting mode of giving an example, the embodiment shown with reference to drawing is illustrated, in these drawings:
Fig. 1 has view before the tire of tire surface according to the invention;
Fig. 2 is the transparent view of tire shown in Figure 1;
Fig. 3 is the planar view of the up-sizing of tire surface shown in the figure;
Fig. 4 is the planar view of a kind of variant of tire surface shown in Figure 3;
Fig. 5 is the planar view of the another kind of variant of tire surface shown in Figure 3;
Fig. 6 is the planar view of another variant of tire surface shown in Figure 3;
Fig. 7 is a kind of planar view of comparative tire face;
The chart of Fig. 8 to 14 shows tire shown in Figure 1 and comparative tire shown in Figure 7 is test gained result.
The specific embodiment
Fig. 1 and 2 shows the tire 1 that has tire surface 2, and this tire surface is defined in the axial direction by two shoulders 8 and 12.Tire surface 2 has circumferential groove 3,4,5 and 6 (see figure 3)s, and these grooves are along longitudinal extension, and parallels with the equatorial plane 7 of tire.Tire surface 2 comprises 3 circumferential tread piece rows 9,10 and 11, also comprises 10 and two side rows 9 and 11 of a row of central authorities.Shoulder 8 is separated with tread blocks row 9 by means of circumferential groove 3.Tread blocks row 10 is between circumferential groove 4 and 5.Tread blocks row 11 is between circumferential groove 5 and 6.Shoulder 12 is separated with tread blocks row 11 by means of circumferential groove 6.
Tread blocks row 9 comprises a series of tread blocks 13, and tread blocks row 10 comprises a series of tread blocks 14, and tread blocks row 11 comprises a series of tread blocks 15.Tread blocks 13,14 and 15 be shaped as the shark fin-shaped or falculate.
Each tread blocks 13 defines by 103 of circumferential groove sections (tread blocks bottom), and is connecting transverse groove 16 and 18.Connected transverse groove 16 and 18 extends from the end of circumferential groove section 103, and polymerization promptly meets at a common ground in 19 places, shared summit.Connected transverse groove 16 and 18 shared summit 19, with hithermost that circumferential groove 4, spaced apart by the made contiguous circumferential flank of elastomeric material 20.Each transverse groove 18 is separated by continuous tire surface part 21 and the transverse groove subsequently 16 in the middle of each, this tire surface part from circumferential groove 3 extend through circumference flank 20, form independent object with this circumference flank.Therefore, continuous tire surface part 21 is just separated the coherent tread blocks 13 of two centres.In each tread blocks row, the distance between the corresponding point of the coherent tread blocks 13 of two centres is to measure along the bottom of this tread blocks, and this is apart from the gradient that forms this row.
All connected transverse grooves 16 and 18 shared summit 19, all along longitudinal direction have same towards.That is to say, the tip (cusp) that the row 9 of tread blocks 13 is had, its along longitudinal direction towards all being identical.
Each tread blocks 14 is defined by circumferential groove section 105 and corresponding connected transverse groove 26 and 28, and this transverse groove has the shape as groove 16 and 18.The minimum width of groove 26 is 1 millimeter, and maximum width is 7.6 millimeters, and the degree of depth increases to 8.7 millimeters from 1 millimeter (summit 29).The minimum width of groove 28 is 1 millimeter, and maximum width is 4 millimeters, and the degree of depth increases to 8.7 millimeters from 1 millimeter (summit 29).Connected transverse groove 26 and 28 polymerizations are in 29 places, shared summit, and this summit and hithermost that circumferential groove 4 are spaced apart by the made contiguous circumferential flank of elastomeric material 24.Each transverse groove 26 is separated by continuous tire surface part 25 and the transverse groove subsequently 28 in the middle of each, this tire surface part from circumferential groove 5 extend through circumference flank 24, form independent object with this circumference flank.
All connected transverse grooves 26 and 28 shared summit 29, all along longitudinal direction have same towards, and have with the shared summit 29 of connected transverse groove 26 and 28 towards opposite towards.That is to say, the tip that tread blocks 14 is had, its towards with tread blocks 13 tips towards opposite.
Each tread blocks 15 is defined by circumferential groove section 106 and corresponding connected transverse groove 36 and 38, and this transverse groove has as the shape of groove 26 and 28 and size.Connected transverse groove 36 and 38 polymerizations are in 39 places, shared summit, and this summit and hithermost that circumferential groove 5 are spaced apart by the made contiguous circumferential flank of elastomeric material 30.Each transverse groove 36 is separated by continuous tire surface part 31 and the transverse groove subsequently 38 in the middle of each, this tire surface part from circumferential groove 6 extend through circumference flank 30, form independent object with this circumference flank.
All connected transverse grooves 36 and 38 shared summit 39, all along longitudinal direction have same towards, these summits towards, with the shared summit 29 of connected transverse groove 26 and 28 towards identical, and with the shared summit 19 of connected transverse groove 16 and 18 towards opposite.
Tread blocks row 10 and 11 decorative pattern is that equatorial plane round tire rotates 180 ° of above-mentioned tread blocks rows and obtains.
The transverse groove 16 and 18 of tread blocks 9 has corresponding extension 41 and 42, and this extension extends to outside the circumferential groove 3, enters in the axially interior shoulder regions 108.Axially outer shoulder regions 208 has the antithetical phrase of transverse groove 43 and 44, and this transverse groove polymerization is in 45 places, shared summit.Transverse groove 43 and 44 is between extension 41 and 42, and is and spaced apart with circumferential groove 3 by the made continuous part 46 of elastomeric material.
Tread blocks row 11 transverse groove 36 and 38 has corresponding extension 51 and 52, and this extension extends to outside the circumferential groove 6, enters in the axially interior shoulder regions 112.Axially outer shoulder regions 212 has the antithetical phrase of transverse groove 53 and 54, and this transverse groove extends from circumferential groove 6, and polymerization is in 55 places, shared summit.Transverse groove 53 and 54 is between extension 51 and 52.
The shared summit 45 of transverse groove 43 and 44 antithetical phrase, along longitudinal direction have identical towards.They towards with shared summit 19 towards identical.The shared summit 55 of transverse groove 53 and 54 antithetical phrase, along longitudinal direction have identical towards.They towards with shared summit 29 and 39 towards identical, and with shared summit 45 towards opposite.
In tire surface 2, the blank of shoulder 8/solid ratio is less than this ratio of shoulder 12.When tire 1 was assemblied on the automobile, above-mentioned shoulder was positioned at the outside of automobile, and shoulder 12 then is positioned at automobile inner side.
Tire surface 2 (see figure 3)s are in blank/solid ratio=0.23 at shoulder 8 places; Blank/solid ratio=0.23 in circumferential tread piece row 9; Blank/solid ratio=0.28 in circumferential tread piece row 10; Blank/solid ratio=0.28 in circumferential tread piece row 11; And in blank/solid ratio=0.28 at shoulder 12 places.
The decorative pattern of tire surface 2 is asymmetric types, promptly when tire with set towards but not on the contrary on being installed in automobile the time, tire surface is turned round in more efficient mode.In other words, tire preferably has the inboard (vehicle one side) and the outside.In tire surface 2, this is to obtain by means of blank different on the both sides/solid ratio: this ratio on the outside is less, and this ratio on the inboard is bigger.Low blank on the outside/solid ratio helps handling automobile and travels on dry pavement, and is especially all the more so for the high-performing car that adopts big arch angle, thereby, be asymmetric with regard to the track that makes tire (tire surface).
Fig. 4 display of tyre face 62, it is a kind of variant of tire surface shown in Figure 3, in the figure, same parts are represented with same label.Tire surface 62 is asymmetric direction types, promptly it had along longitudinally towards, be (arrow A) of pointing to direct of travel.In tire surface 62, be respectively the shared summit 19,29 and 39 of connected groove 16 and 18,26 and 28,36 and 38, along longitudinal direction towards all identical.And, shared summit 45 and 55 towards, identical with shared summit 19,29 and 39.
In tire surface 62, when tire 1 was installed on the automobile, shoulder 8 was positioned on the outside.
Fig. 5 display of tyre face 72, it is a kind of variant of tire surface shown in Figure 3, in the figure, same parts are represented with same label.The decorative pattern of tire surface 72 is mirror images of tire surface 62 decorative patterns, and it also is asymmetric direction type.
Fig. 6 display of tyre face 82, it is a kind of variant of tire surface shown in Figure 3, in the figure, same parts are represented with same label.Tire surface 82 is asymmetric direction types, and it comprises shoulder 8 and 412, also comprise at the circumferential tread piece between circumferential groove 3 and 4 row 209, circumferential tread piece between circumferential groove 5 and 6 and arrange 211, and two central circumference flanks 230 separating by intermediate circumference groove 232 and 231.
The width range of intermediate circumference groove 232 is between 1.5 to 3 millimeters, and depth range is between 1 to 4 millimeter.For example, its width is 1.5 millimeters, and the degree of depth is 2 millimeters.
Tread blocks row 209 comprises a series of tread blocks 213, and each this tread blocks defines by circumferential groove section 103 and two connected transverse grooves 216 and 218.Connected transverse groove 216 and 218 extends from the end of circumferential groove section 103, and polymerization is in 219 places, shared summit, and this summit and hithermost circumferential groove 4 are spaced apart by 20 of the made continuous circumference flanks of elastomeric material.Each transverse groove 218 and each transverse groove 216 are following closely separated by continuous tire surface part 221, and this part is extended from circumferential groove 3, and through circumference flank 20 forms an independent object with this circumference flank.
Tread blocks row 211 comprises a series of tread blocks 215, and each this tread blocks defines by circumferential groove section 106 and two connected transverse grooves 236 and 218.Connected transverse groove 236 and 238 extends from the end of circumferential groove section 106, and polymerization is in 239 places, shared summit, and this summit and hithermost circumferential groove 5 are spaced apart by 30 of the made continuous circumference flanks of elastomeric material.
Each transverse groove 238 and each transverse groove 236 are following closely separated by continuous tire surface part 231, and this part is extended from circumferential groove 6, and through circumference flank 30 forms an independent object with this circumference tyre bead (bead).
Connected transverse groove 216 and 218 and 236 and 238 comprises the section that is arranged essentially parallel to circumferential groove, and with respect to circumferential groove and the bevelled section.Groove 216,218,236 and 238 width are along 219 or 239 increasing gradually towards circumferential groove 3 or 6 those directions from the summit.
In axial inner region 112, shoulder 412 has the extension 241 and 242 of transverse groove 236 and 238, and in axial exterior domain 212, this shoulder has transverse groove 243 and 244 antithetical phrases of polymerization in shared summit 245. Transverse groove 243 and 244 is between extension 241 and 242, and is and spaced apart with circumferential groove 6 by the made continuous part 246 of elastomeric material.
The decorative pattern of shoulder 412 is that equatorial plane with respect to tire rotates 180 ° in above-mentioned decorative pattern and obtains from shoulder 8.
In Fig. 6, with the represented tire surface decorative pattern part of oval line segment F1, produced the proportional disturbance (disturbance) of its frequency and transverse groove sum, the track region of these transverse grooves has stood bump.In the zone of defining by oval line segment F2, by the disturbance that decorative pattern produced, equal half of above-mentioned transverse groove sum, because these transverse grooves meet at same summit in couples.Another advantage with regard to the low noise level is that above-mentioned transverse groove antithetical phrase is (blind) that covers at the place, shared summit of institute's polymerization, and promptly they meet at the solid section of tire surface rather than in the space of opening wide, for example in other other grooves.
The structure of tire 1 itself is a general type, and it comprises carcass, is positioned at the tire surface edge band of matrix crown, and the sidewall of a pair of axially facing, and this sidewall ends at tyre bead, is strengthened by tyre bead kernel and relevant bead filler.Tire preferably also comprises the banded structure between carcass and tire surface edge band.Carcass is strengthened by one or more carcass synusia, and this synusia is fixed on the tyre bead kernel, and simultaneously, banded structure comprises two tapes, this tape radially arrange one on another root top.Tape is that the pars fibrosa that is coated with rubber by the containing metal cord forms, and this tape is parallel to each other in each bar, and intersects with the tape of adjacency, preferably tilts with symmetric mode with respect to equatorial plane.Banded structure preferably also comprises the 3rd tape, and this tape is in radially outermost position, its cord be circumference towards, promptly become the zero degree angle with respect to above-mentioned equatorial plane.The cord of zero degree angle band shape is preferably made by textiles, even is more preferably by heat-shrinkable metal and makes.The orthogonal cross-section height of tire 1 and the H/C ratio of this section maximum width, scope is between 0.65 to 0.20.
Preferably tire 1 is the sort of type of the very low section of H/C ratio between 0.45 to 0.20.
Tire according to the invention, an one example have the sort of tire surface 2 shown in Fig. 1 to 3 exactly, and this tire is by tyre P structure shown in Figure 7 and born contrast test.
Having selected to do the tyre P of contrast, is because it has excellent characteristic, and has passed through fast and the sports of very high performance are admitted with the type of car.
Tire according to the invention, it is of a size of the 225/40R18 type, and wheel rim is 7.5 * 18, and inflation pressure is 2.2 crust.The tire of doing contrast also has same unit.
At first, then refill and join 4 tires of doing contrast, test 4 tires according to the invention of BMW 3281 type sample car fit ons.
The water surface slides and tests is to reach along straight road segments to carry out round bend, and on dry and moist road surface, carried out braking and tested, also on dry and moist road surface, carried out operational testing, carried out in the car and the test of the noise outside the car, and comfort test.
The water surface that carries out along the straight road surface of the level and smooth pitch section of one section predetermined length (100 meters) test of sliding, water surface layer is predetermined constant altitude (7 meters), when each vehicle of testing through after, this water surface layer just restores to the original state.Institute's testing vehicle sails test segment with constant speed (about 70 kilometers/hour) under the good fit situation, and quickens, till occurring completely losing the situation of applying.
Test round the water surface slip that bend carries out, be on a section of level and smooth and dry asphalt coating, to carry out, this turning radius constant (100 meters), length is predetermined, and comprise along a last highway section and carrying out, this last highway section is a predetermined length (20 meters), and institute's wetted surface layer thickness is scheduled to (6 millimeters).Carried out the test of constant speed with different velocity amplitudes.
At test period, the maximum centrifugal accekeration and the maximum speed value of the test of sliding corresponding to the complete water surface have all been done record.
The braking test is to carry out under dry and moist situation along one section straight asphalt coating, noted from the braking distance of predetermined rate of onset, under the drying regime of road surface, this distance is 100 kilometers/hour, and next in moisture conditions is 80 kilometers/hour.Braking distance depends on the arithmetical mean that a series of record values are such.
The operational testing of being done under dry and moist road surface situation carries out along predetermined road section, and this highway section is the loop behind the close to traffic normally.By with constant speed and quicken and between deceleration period to some characteristic manoeuvre (for example lane change, overtake other vehicles, around pole, enter and come off the curve) simulate, be the marking of tire reaction situation by the test driver in the above-mentioned maneuver period, the performance condition of this tire has just obtained.
The marking table is being represented by the test driver in the test period objective suggestion expressed in order to the equipment that is contrasted.
The noise test is carried out at indoor and outdoors.
Indoor test is in a good echoless chamber (semianechoic room), use and above-mentionedly assembled tire according to the invention and carry out, then loaded onto the tire of doing contrast and tested equally, during test, tire and the drum that rotating are kept in touch, and this drum is made by the friction speed rotation.Outside Che Nei and car, arranged microphone, so that measure interior noise and external noise respectively.
Outdoor test is to carry out along the straight highway section that microphone has been installed.Test enters this highway section with car with predetermined admission velocity, then, closes engine, and the noise that car is outer is done measurement with neutral arrangement (neutral gear).
Comfort test is that the driver's comparative tire by test absorbs the integral body sensation of ground-surface degree of roughness gained and marking.
Noise and comfort test are by carrying out under the condition of the prescribed by standard of REO1.
Table 1 has shown test result, the numerical value that in this table, is distributed, and the numerical value of all comparative tires, its percentum is fixed as 100.
Table 1
| Comparative tire | Tire according to the invention | |
| Slip along |
100 | 105 |
| |
100 | 110 |
| On dry pavement, brake | 100 | 103 |
| On moist road surface, brake | 100 | 107 |
| On dry pavement, operate | 100 | 100 |
| On moist road surface, operate | 100 | 106 |
| |
100 | 100 |
| |
100 | 110 |
| |
100 | 100 |
(at the numerical value that outdoor test period write down)
In table 1, the improvement that the numeric representation greater than 100 is carried out with respect to comparative tire.
Test result shows, tire according to the invention, and in the braking test of carrying out on the moist road surface, and external noise test aspect, its performance obviously is better than comparative tire.
Fig. 8 and 9 diagram of curves have shown and car outer (Fig. 8) and the interior relevant situation of (Fig. 9) noise level dB (A) of car, this car test speed (kilometer/hour) scope is between 150 to 200 kilometers/hour.Curve A is relevant with comparative tire with A1, and curve B is relevant with tire according to the invention with B1.Can notice, tire according to the invention, its external noise level, compared with the on average low 1.5dB (A) of this level of comparative tire, simultaneously, the interior noise level is substantially equal to the noise level of comparative tire.
Three-dimensional curve among Figure 10,11,12 and 13, show with speed (kilometer/hour) progression of the sound pressure handkerchief (Pa) of the phoneme measured signal relevant with frequency (hertz).
Figure 10 relates to the interior noise that has assembled according to the automobile of tire of the present invention.Figure 12 relates to the interior noise of car of the automobile that has assembled comparative tire.
From these diagram of curves as seen, tire according to the invention, it is three different frequency limits that its noise scatters: low-frequency range (0 to 300 hertz), be frequency limit (800 to 1600 hertz) and another intermediate frequency range (300 to 800 hertz) of feature with the tire gradient.
Though and comparative tire scatters noise with average lower density noise level, scatter noise with low frequency and high frequency fully.
On the contrary, tire according to the invention is to scatter noise in whole frequency limit more equably, and the noise that it produced will just can be perceived in the mode that more weakens.
Figure 11 relates to the car external noise of the automobile (motor car) that has assembled comparative tire.Figure 13 relates to small passenger car (car) the car external noise that has assembled tire according to the invention.
Different with the diagram of curves about interior noise, the diagram of curves about external noise does not have " via solid " (passing through small passenger car) to propagate the low-frequency range of this feature of noise.On the other hand, emphasized that this noise extends to such an extent that reach 2500 hertz (" via air " propagate) at the noise that intermediate frequency and high-frequency range produced.Tire according to the invention has also produced the noise distribution in this case on the frequency band of broad, weakened the average density of noise.
The curve of Figure 14 shows (curve B 2) relevant with the speed of tire according to the invention and the density of relevant (curve A 2) external noise dB (A) with comparative tire.
Curve among this figure, shown No. 10844 standards, on Vizzola Ticino track, the what is called that above-mentioned automobile carried out " has been slided noise " (coast-by-noice) test (ISO 362-1981 number according to ISO, revise part delivered in 1,1985 year) the gained result.Such as known, at these test periods, reference velocity is 80 kilometers/hour.
Curve shown in Figure 14 demonstrates tire according to the invention, has been proved to be its noise less than comparative tire noise 2dB (A).
Claims (19)
1. the used tire of automobile (1), this tire has equatorial plane (7), and comprises a tire surface (2) and two shoulders (8,12; 412), above-mentioned tire surface (2) has first and second circumferential grooves (3,4; 5,4; 6,5); First and second transverse grooves (16,18; 28,26; 38,36; 216,218; 236,238), form at least one tread blocks (13; 14; 15; 213; 215) circumferential row (9; 10; 11; 209; 211), this circumferential row is positioned at above-mentioned first and second circumferential groove (3,4; 5,4; 6,5), each above-mentioned tread blocks (13; 14; 15; 213; 215) by above-mentioned first circumferential groove (3; 5; 6) a section (103; 105; 106) and above-mentioned first and second transverse grooves (16,18; 28,26; 38,36; 216,218; 236,238) define, described transverse groove is from above-mentioned first circumferential groove (3; 5; 6) extend, and polymerization in above-mentioned second circumferential groove (4; 5) spaced shared summit (19; 29; 39; 219; 239) sentence the formation tip, this shared summit (19; 29; 39; 219; 239) by continuous circumference tire surface flank (20; 24; 30) with above-mentioned second circumferential groove (4; 5) separate, defining tread blocks (13; 14; 15; 213) above-mentioned second transverse groove (18; 26; 36; 218; 236) by extending to above-mentioned circumference flank (20 from above-mentioned first circumferential groove; 24; 30) band tyre face portion (21; 25; 31; 221; 225; 231) with first transverse groove (16; 28; 38; 216; 238) separate, thereby form a mono-object with above-mentioned circumference flank, and above-mentioned tread blocks (13; 14; 15; 213; 215) be spaced apart from each other with following closely tread blocks.
2. tire as claimed in claim 1 (1) is characterized in that: above-mentioned first and second transverse grooves (16,18; 28,26; 38,36; 216,218; 238, at least one 236) is along from above-mentioned shared summit (19; 29; 39; 219; 239) towards above-mentioned first circumferential groove (3; 5; 6) on the direction, width increases gradually.
3. tire as claimed in claim 2 (1) is characterized in that: above-mentioned first and second transverse grooves (16,18; 28,26; 38,36; ) at least one, be falculate.
4. tire as claimed in claim 3 (1) is characterized in that: above-mentioned first and second transverse grooves (16,18; 28,26; 38,36; ) at least one, have one by the formed center line (66 of circular arc; 68), this circular arc has predetermined radius of curvature.
5. tire as claimed in claim 4 (1) is characterized in that: above-mentioned center line (66) have its direction be basically parallel to first section (166) of above-mentioned equatorial plane (7), with respect to above-mentioned first circumferential groove (3; 5; 6) have second section (266) of predetermined inclination, and the jointing (366) that above-mentioned first and second sections (166,266) are linked together.
6. tire as claimed in claim 2 (1) is characterized in that: above-mentioned first and second transverse grooves (216,218; 236, at least one 238) has second section that its direction is basically parallel to first section of above-mentioned equatorial plane, has predetermined inclination with respect to above-mentioned first circumferential groove, and the jointing that above-mentioned first and second sections are linked together.
7. tire as claimed in claim 1 (1) is characterized in that: above-mentioned at least one tread blocks row (9; 10; 11; 209; 211) each tread blocks (13 in; 14; 15; 213; 215) be the shape of shark fins style.
8. tire as claimed in claim 1 (1) is characterized in that: above-mentioned at least one tread blocks row (9; 10; 11; 209; 211) above-mentioned first and second transverse grooves (16,18; 28,26; 38,36; 216,218; 236, shared summit (19 238); 29; 39; 219; 239) has in the vertical same orientation.
9. tire as claimed in claim 1 (1) is characterized in that: above-mentioned tire surface (2) has central circumferential tread piece row (10), and first and second side circumferential tread pieces rows (9,11).
10. tire as claimed in claim 9 (1), it is characterized in that: the shared summit (19) of above-mentioned first side tread blocks row's (9) above-mentioned first and second transverse grooves (16,18), its orientation is arranged above-mentioned first and second transverse grooves (28,26 of (11) with above-mentioned central tread blocks row (10) and second side tread blocks; The opposite orientation on shared summit 38,36) (29,39).
11. tire as claimed in claim 9 (1) is characterized in that: above-mentioned 3 tread blocks rows' (9,10,11) above-mentioned first and second transverse grooves (16,18; 28,26; 38, shared summit (19 36); 29; 39), has identical orientation.
12. tire as claimed in claim 1 (1) is characterized in that: above-mentioned tire surface (2) has first and second side circumferential tread pieces row (209,211) and two central circumference flanks of being separated by middle part circumferential groove (232) (230,231).
13. tire as claimed in claim 12 (1) is characterized in that: the opposite orientation on the orientation on above-mentioned first side tread blocks row's (209) shared summit (219) and above-mentioned second side tread blocks row's (211) shared summit (239).
14., it is characterized in that: above-mentioned first and second circumferential tread pieces row (9 as claim 9 or 12 described tires (1); 11; 209; 211) at least one row's above-mentioned first and second transverse grooves (16,18 in; 28,26; 38,36; 216,218; 238,236), extend to cooresponding first circumferential groove (3; 6) outside, and extend into above-mentioned shoulder (8; 12; 412) one of axial inner zone (108; 112) in.
15. tire as claimed in claim 1 (1) is characterized in that: at least one above-mentioned shoulder (8; 12; 412) in axial perimeter (208; 212) has other transverse groove (43,44,53,54 in; 243,244) right, these transverse grooves are (44,55,245) polymerization towards shared summit.
16. tire as claimed in claim 15 (1) is characterized in that: above-mentioned other polymerization transverse groove (43,44; 243,244), by the made solid section of elastomeric material (46) with above-mentioned first circumferential groove (3; 6) spaced apart.
17. tire as claimed in claim 15 (1) is characterized in that: above-mentioned other polymerization transverse groove (53,54) extends from above-mentioned first circumferential groove (6).
18. as claim 16 or 17 described tires (1), it is characterized in that: the axial inner zone (108) of shoulder (8), its space/solid ratio is less than this ratio in the axial inner zone (112) of another shoulder (12), and when above-mentioned tire (1) is installed on the above-mentioned automobile, be positioned on the outside of this automobile.
19. tire as claimed in claim 1 (1) is characterized in that: described first and second transverse grooves (16,18; 28,26; 38,36; 216,218; 238, at least one 236) is from above-mentioned shared summit (19; 29; 39; 219; 239) towards above-mentioned first circumferential groove (3; 5; 6) degree of depth increases on the direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP01201232.4 | 2001-03-30 | ||
| EP01201232 | 2001-03-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1505569A CN1505569A (en) | 2004-06-16 |
| CN100406279C true CN100406279C (en) | 2008-07-30 |
Family
ID=31725342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028077008A Expired - Lifetime CN100406279C (en) | 2001-03-30 | 2002-03-08 | Tread pattern for car tire |
Country Status (5)
| Country | Link |
|---|---|
| KR (1) | KR100803227B1 (en) |
| CN (1) | CN100406279C (en) |
| AR (1) | AR033006A1 (en) |
| BR (1) | BR0208417B1 (en) |
| RU (1) | RU2286889C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI466786B (en) * | 2011-02-17 | 2015-01-01 | Bridgestone Corp | Tire |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4800709B2 (en) * | 2005-08-25 | 2011-10-26 | 株式会社ブリヂストン | Pneumatic tires for motorcycles |
| JP2007237816A (en) * | 2006-03-06 | 2007-09-20 | Bridgestone Corp | Pneumatic tire |
| JP4577455B1 (en) * | 2010-03-18 | 2010-11-10 | 横浜ゴム株式会社 | Pneumatic tire |
| EP3095622B1 (en) * | 2014-03-11 | 2017-11-01 | Sumitomo Rubber Industries Limited | Pneumatic tire |
| JP6949654B2 (en) * | 2017-10-13 | 2021-10-13 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tires |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06199109A (en) * | 1992-12-28 | 1994-07-19 | Bridgestone Corp | Pneumatic tire |
| EP0611667A1 (en) * | 1993-02-16 | 1994-08-24 | Semperit Reifen Aktiengesellschaft | Vehicle tyre |
| JPH07285303A (en) * | 1994-04-18 | 1995-10-31 | Bridgestone Corp | Pneumatic tire with straight groove |
| JPH07290909A (en) * | 1994-04-26 | 1995-11-07 | Bridgestone Corp | Pneumatic tire provided with directional inclined groove |
| EP0855291A2 (en) * | 1997-01-25 | 1998-07-29 | Continental Aktiengesellschaft | Tread for car tyre |
| JPH11334317A (en) * | 1998-05-28 | 1999-12-07 | Bridgestone Corp | Pneumatic radial tire |
-
2002
- 2002-03-08 CN CNB028077008A patent/CN100406279C/en not_active Expired - Lifetime
- 2002-03-08 KR KR1020037012843A patent/KR100803227B1/en active IP Right Grant
- 2002-03-08 BR BRPI0208417-1A patent/BR0208417B1/en not_active IP Right Cessation
- 2002-03-08 RU RU2003131896/11A patent/RU2286889C2/en active
- 2002-03-26 AR ARP020101092A patent/AR033006A1/en active IP Right Grant
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06199109A (en) * | 1992-12-28 | 1994-07-19 | Bridgestone Corp | Pneumatic tire |
| EP0611667A1 (en) * | 1993-02-16 | 1994-08-24 | Semperit Reifen Aktiengesellschaft | Vehicle tyre |
| JPH07285303A (en) * | 1994-04-18 | 1995-10-31 | Bridgestone Corp | Pneumatic tire with straight groove |
| JPH07290909A (en) * | 1994-04-26 | 1995-11-07 | Bridgestone Corp | Pneumatic tire provided with directional inclined groove |
| EP0855291A2 (en) * | 1997-01-25 | 1998-07-29 | Continental Aktiengesellschaft | Tread for car tyre |
| JPH11334317A (en) * | 1998-05-28 | 1999-12-07 | Bridgestone Corp | Pneumatic radial tire |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI466786B (en) * | 2011-02-17 | 2015-01-01 | Bridgestone Corp | Tire |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20030085081A (en) | 2003-11-01 |
| RU2003131896A (en) | 2005-04-10 |
| AR033006A1 (en) | 2003-12-03 |
| RU2286889C2 (en) | 2006-11-10 |
| KR100803227B1 (en) | 2008-02-14 |
| CN1505569A (en) | 2004-06-16 |
| BR0208417B1 (en) | 2012-06-26 |
| BR0208417A (en) | 2004-03-02 |
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