vehicle tires

Abstract

The invention relates to a vehicle tyre with a tread with profile positives (1) with cuts (3), each cut (3), viewed in plan view, having at least one cut to the maximum depth (t E ) and having an incision base (7a), and at least one raised incision section (6) formed radially outside a base elevation (8), wherein the raised incision section (6) has a channel-shaped incision edge (6a) with a channel cross-sectional area (F2) which delimits the base elevation (8) in its interior and adjoins the incision base (7a). The channel-shaped incision edge (6a) comprises a tapered channel (6a2) with a radially outer channel end (6a 2a ) and a radially inner channel end (6a 2i) or is formed from the tapered channel (6a2), wherein the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) in the tapered channel (6a2) extends along the channel center axis (A2) from the radially outer channel end (6a 2a ) to the radially inner channel end (6a 2i ) enlarged throughout.

Description

[0001] The invention relates to a vehicle tire with a tread with profile positives (co-)limited by grooves with cuts running in plan view to the axial direction at an angle of 0° to 60°, each with two cut walls, a width determined between them of 0.30 mm to 2.00 mm and a maximum depth of 70% to 100% of the tread depth, wherein each cut, viewed in plan view, comprises at least one cut section extending over its entire extent to the maximum depth and having a cut base, and at least one raised cut section adjoining said cut section and formed radially outside a base elevation, wherein the raised cut section has a channel-shaped cut edge delimiting the base elevation in its interior and adjoining the cut base, said channel-shaped cut edge having a channel center axis and a channel cross-sectional area,whereby the channel-shaped incision edge projects beyond both incision walls over its entire extent, viewed in a cross-section oriented perpendicular to the channel central axis.

[0002] Such a vehicle tire is known, for example, from DE 10 2014 210 823 A1. The vehicle tire has a tread with profile positives traversed by cuts running at an angle of up to 45° to the axial direction and having a width of 0.40 mm to 1.00 mm, a central cut section with a maximum depth of at least 70% of the tread depth, and two edge-side, raised cut sections each formed radially outside a base elevation. The raised cut sections have different depths. In one of the embodiments, the raised cut section with the shallow depth has an S-shaped, curved, channel-shaped cut edge that delimits the base elevation in its interior and adjoins the cut base, which is also channel-shaped.Furthermore, an additional channel is provided, running radially between the tread periphery and the channel-shaped cut base. Cuts designed in this way improve meltwater absorption when driving on ice.

[0003] Since the channels simultaneously impair the support effects between the cut walls that occur under load, there is a risk that the channels will contribute to an increase in tread wear.

[0004] The invention is therefore based on the object of noticeably reducing the risk of increased tread wear in a vehicle tire of the type mentioned at the outset while maintaining a high water absorption capacity of the cuts.

[0005] The stated object is achieved according to the invention in that the channel-shaped incision edge comprises a tapered channel with a radially outer channel end and a radially inner channel end or is formed from the tapered channel, wherein the channel cross-sectional area of ​​the channel-shaped incision edge in the tapered channel increases continuously along the channel center axis from the radially outer channel end to the radially inner channel end and wherein the incision is free of channels running to the tread periphery and locally widening the incision.

[0006] The channel, which tapers or widens depending on the direction, provides a particularly effective water drainage path or water absorption reservoir, ensuring continued good water absorption through the cut. Since the cut is free of channels extending to the tread periphery and locally widening the cut, the cut walls can support each other flatly under load, so that the stiffness reduction associated with the cuts is less than before, thus maintaining the abrasion resistance of the tread positives at a higher level.

[0007] According to a preferred embodiment, the size of the channel cross-sectional area of ​​the channel-shaped incision edge at the radially inner channel end of the tapered channel is 120% to 200%, in particular at least 130%, preferably at least 140%, and particularly preferably 150% to 180%, of the size of the channel cross-sectional area of ​​the channel-shaped incision edge at the radially outer channel end of the tapered channel. This contributes to a high water absorption capacity of the tapered channel and thus of the incision.

[0008] A further preferred embodiment provides that the channel cross-sectional area of ​​the channel-shaped incision edge increases continuously, i.e., linearly, along the channel center axis from the radially outer channel end of the tapered channel to the radially inner channel end of the tapered channel. This contributes to a further improvement in the water conduction via the channel-shaped incision edge into the incision and thus to maintaining a high water absorption capacity.

[0009] According to a further preferred embodiment, the channel cross-sectional area of ​​the channel-shaped cut edge is circular or oval. Such a channel-shaped cut edge is particularly crack-resistant, so the likelihood of cracks occurring in the adjacent rubber material is particularly low, which also contributes to maintaining high water absorption capacity.

[0010] An advantageous further development of the latter preferred embodiment consists in that the channel cross-sectional area of ​​the channel-shaped incision edge is circular and has a diameter of 110% to 175%, in particular up to 150%, of the width of the incision at the radially outer end of the tapered channel. This also contributes to maintaining a high water absorption capacity.

[0011] With regard to the rigidity of the profile positives and the water absorption capacity of the incisions, it is advantageous if the tapered channel, viewed in the longitudinal section of the incision running along the incision center surface, forms a side flank that laterally delimits the base elevation and, based on the channel center axis, runs straight and at an angle of 2° to 35° to the radial direction, in particular of up to 25°, preferably of up to 20°, preferably of up to 15°, particularly preferably of up to 10°, most preferably of up to 5°.

[0012] According to a further preferred embodiment, the channel-shaped incision edge comprises a radially outer channel adjoining the radially outer channel end of the tapered channel, which channel forms a cover surface extending parallel to the tread periphery and delimiting the base elevation in the radial direction. The channel cross-sectional area of ​​the channel-shaped incision edge in the radially outer channel corresponds to the channel cross-sectional area of ​​the channel-shaped incision edge at the radially outer channel end of the tapered channel. The widening of the channel-shaped incision edge by means of such a radially outer channel contributes to a further increase in the water absorption capacity of the incisions.

[0013] It is also advantageous if the cutout base is channel-shaped and has a channel central axis. The channel-shaped cutout base, viewed in a cross-section oriented perpendicular to the channel central axis, projects beyond both cutout walls and, at least at the connection to the channel-shaped cutout edge, has a channel cross-sectional area that matches the edge. The channel cross-sectional area of ​​the channel-shaped cutout base preferably has a constant size and shape along the channel central axis. The channel-shaped cutout base is a favorable addition with regard to the water absorption capacity of the cutout.

[0014] According to a further preferred embodiment, the channel-shaped incision edge comprises a radially inner channel adjoining the radially inner channel end of the tapered channel. This channel—relative to the channel center axis—is continuously curved with a constant direction of curvature and extends radially outward from the incision base of the incision section. In the case of a channel-shaped incision base, it preferably adjoins the channel-shaped incision base tangentially with respect to the channel center axes. The radially inner channel contributes to a low-turbulence water flow in the channel-shaped incision edge and thus further improves the water absorption behavior of the incision.

[0015] Preferably, the cut traverses the respective profile positive. Such cuts exhibit a pronounced opening capability when passing through the lagoon contact area, so that the cuts open significantly, which also contributes to maintaining high water absorption capacity.

[0016] Furthermore, it is preferred if the incision has a plane of symmetry that runs perpendicular to the incision centerline in plan view and in the radial direction. This contributes to a further reduction in the risk of increased tread wear.

[0017] In this context, it is further advantageous if the incision section having the incision base, viewed in plan view, has a central section part running in the form of a baseless, in particular isosceles trapezoid, and in particular two straight and aligned lateral section parts and is particularly preferably composed of the central section part and the lateral section parts.

[0018] According to a further preferred embodiment, the sipe has at least one central sipe zone, spaced from the sipe edges, the sipe base, and the or each channel-shaped sipe edge, forming a local bulge. This central sipe zone, when viewed from the sipe walls, is elongated parallel to the tread periphery and, viewed in a cross-section perpendicular to the sipe centerline in plan view, is curved. The central sipe zone improves the support of the sipe walls under load of the respective tread positive, which contributes to the occurrence of a uniform wear pattern.

[0019] Furthermore, it is preferred if the central incision zone extends at least over the entire central section part and preferably extends with a zone end section into each of the lateral section parts and particularly preferably additionally into the or each raised incision section.

[0020] Further features, advantages and details of the invention will now be described in more detail with reference to the drawing, which schematically shows an embodiment of the invention. Fig. 1 a plan view of a section of a profile block of a tread of a pneumatic vehicle tire developed in the plane with an embodiment variant of the invention, Fig. 2 a front view of a trigger body of a cut according to the Fig. 1 direction of view indicated by arrow S2, Fig. 3 a section along the line III-III of the Fig. 2 with rubber material adjacent to the incision, Fig. 4 an enlargement of the detail Z4 of the Fig. 2 and Fig. 5 a section along the line VV of the Fig. 4 with rubber material adjacent to the incision.

[0021] Vehicle tires designed according to the invention are tires for motor vehicles, in particular for multi-track motor vehicles, preferably for passenger cars (PCs), vans (transporters) or SUVs, and preferably pneumatic vehicle tires, particularly preferably pneumatic vehicle tires of radial design, for rims with an integer rim diameter of 13 inches to 24 inches, in particular of 14 inches to 19 inches.

[0022] Fig. Figure 1 shows a plan view of a section of a central profile block 1 of a tread of a pneumatic vehicle tire. The circumferential direction is indicated by a double arrow U.

[0023] The central profile block 1 is Fig. 1 are merely indicated grooves 2, which, in plan view, extend at an angle to the circumferential and axial directions. These grooves have a depth of 60% to 100%, in particular of at least 70%, of the respective intended tread depth in the radial direction, with the tread depth for the preferred tire type typically being 6.5 mm to 13.0 mm. As is known, the tread depth is understood to be the depth of the respective deepest groove(s).

[0024] The central profile block 1 has an outer block surface 1a located in the tread periphery and, in the section shown, is provided with a traversing incision 3 which, in plan view with respect to the circumferential direction, runs inclined in the opposite direction to the grooves 2 and opens into the grooves 2.

[0025] The incision 3 has two incision edges 4 on the block outer surface 1a, a center line m which is spaced in plan view at the same distance from the incision edges 4 and is located at the level of the block outer surface 1a, i.e. at the level of the tread periphery, and follows the incision course centrally. E , according to Fig. 3 two opposing incision walls 5 adjoining the incision edges 4, one incision wall 5 spaced from the incision center line m E outgoing incision center area M E , one as the smallest possible distance between the incision walls 5, therefore perpendicular to the incision center surface M E determined, constant width b E from 0.40 mm to 2.00 mm, in particular from up to 1.80 mm, preferably from up to 1.60 mm, preferably from up to 1.40 mm, particularly preferably from up to 1.20 mm, in the radial direction a maximum depth t E ( Fig. 2) from 70% to 100% of the profile depth and one along a line in plan view between the ends of the incision centre line m E straight auxiliary line h E determined length c E on ( Fig. 1).

[0026] How Fig. 1 in conjunction with Fig. 2, the incision 3 further comprises a plan view perpendicular to the incision center line m E ( Fig. 1) and in the radial direction ( Fig. 2) extending symmetry plane E1, with the incision 3 extending along its incision center line m E from two edge-side, radially raised incision sections 6 ( Fig. 2) and a section extending between the raised incision sections 6 and extending over its entire length along the incision center line m E ( Fig. 1) present extension to the maximum depth t E ( Fig. 2) reaching incision section 7 ( Fig. 2).

[0027] The incision section 7 has a along the auxiliary line h E ( Fig. 1) determined length c7 ( Fig. 2) from 45% to 75%, in particular from 50% to 60%, of the length c E of the incision 3 and, in the embodiment, viewed in plan view, is composed of a central section 71 in the form of a baseless, in particular isosceles trapezoid, and two straight and aligned lateral section parts 72 (see in particular Fig. 1). The central section part 71 has a along the auxiliary line h E ( Fig. 1) determined length c1 ( Fig. 2) from 40% to 60% of the length c7 ( Fig. 2) of the notch section 7 and, viewed in plan view, consists of a subsection 7 forming the shorter base side of the trapezoid 1a ( Fig. 1) and two subsections 7 each forming a trapezoidal leg 1b ( Fig. 1) composed.

[0028] According to Fig. 2, the incision section 7 is radially defined by a groove extending over its entire length c7 to the maximum depth t E running, channel-shaped cutting base 7a adjoining the cutting walls 5 (cf. Fig. 3) which has a channel central axis A1 following its course and according to Fig. 3, in plan view perpendicular to the incision center line m E or viewed in the cross-section perpendicular to the channel central axis A1 (cf. position of line III-III in Fig. 2 in conjunction with the course of the incision center line m E in Fig. 1), has a circular channel cross-sectional area F1 projecting beyond both incision walls 5 and having a constant diameter d1, the size of which will be discussed later. The size of the channel cross-sectional area F1 is therefore constant along the channel center axis A1. The channel center axis A1, viewed in the last-mentioned cross-section, coincides with the geometric center of gravity of the channel cross-sectional area F1.

[0029] How Fig. 2 further shows, in the area of ​​each raised incision section 6 there is a connecting element extending over the entire incision section 6, connected to both incision walls 5, and extending along the incision center surface M E ( Fig. 3) longitudinal section, trapezoidal base elevation 8 with a maximum depth t EEach incision section 6 is located radially outside the respective base elevation 8 and is delimited in its interior to the base elevation 8 by a channel-shaped incision edge 6a which adjoins the incision walls 5 and the corresponding end of the incision base 7a and extends over the entire base elevation 8 and is curved in an S-shape overall, which has a channel center axis A2 following its course and according to Fig. 5, viewed in a cross-section perpendicular to the channel central axis A2 (cf. position of line VV in Fig. 4), has a circular channel cross-sectional area F2 projecting beyond both incision walls 5. The channel center axis A2, viewed in the last-mentioned cross-section, coincides with the geometric center of gravity of the channel cross-sectional area F2.

[0030] According to Fig. 4, the channel-shaped incision edge 6a along the channel center axis A2 is composed of a radially inner channel 6a1, a tapered channel 6a2 and a radially outer channel 6a3.

[0031] The radially inner channel 6a1 runs - with respect to the channel center axis A2 - with a constant curvature direction, in particular along a circular arc, and starting from the channel-shaped notch base 7a of the notch section 7 radially outwards and adjoins the channel-shaped notch base 7a tangentially with respect to the channel center axes A1, A2. The channel cross-sectional area F2 ( Fig. 5) has a constant diameter d in the radially inner channel 6a1 over its entire extension along the channel center axis A2 a1 which corresponds to the diameter d1 of the channel-shaped incision base 7a.

[0032] The radially outer channel 6a3 forms a cover surface which limits the base elevation 8 in the radial direction and runs parallel to the tread periphery in the longitudinal section of the cut 3, and runs - based on the channel center axis A2 - starting from the cut end initially straight at a constant depth t2 determined in the radial direction ( Fig. 2) from 25% to 45% of the maximum depth t E ( Fig. 2) and then bent radially inwards and continuously with a constant direction of curvature, in particular along a circular arc. The channel cross-sectional area F2 ( Fig. 5) has a constant diameter d in the radially outer channel 6a3 over its entire extension along the channel center axis A2 a3 which is smaller than the diameter d1, d a1 and 110% to 175%, in particular up to 150%, of the width b E of incision 3.

[0033] The tapered channel 6a2 forms, along the incision center surface M E extending longitudinal section, a side flank delimiting the base elevation 8, runs - with respect to the channel center axis A2 - straight and to the radial direction at an angle α of 2° to 35°, in particular of up to 25°, preferably of up to 20°, preferably of up to 15°, particularly preferably of up to 10°, most preferably of up to 5°, has a radially outer channel end 6a to the radially outer channel 6a3 2a and to the radially inner channel 6a1 a radially inner channel end 6a 2i The channel cross-sectional area F2 has a diameter d in channel 6a2 a2 which extends over the entire length of the channel 6a2 along the channel center axis A2 from the radially outer channel end 6a 2a to the radially inner channel end 6a 2i in particular in a continuous manner, i.e. in a linear manner, whereby the diameter da2 at the radially outer channel end 6a 2a with diameter d a3 of the radially outer channel 6a3 and at the radially inner channel end 6a 2i with diameter d a1 of the radially inner channel 6a1. The size of the channel cross-sectional area F2 in the channel 6a2 therefore decreases along the channel center axis A2 from the radially outer channel end 6a 2a to the radially inner channel end 6a 2i continuously, in particular continuously, wherein the size of the channel cross-sectional area F2 at the radially inner channel end 6a 2i 120% to 200%, in particular at least 130%, preferably at least 140%, particularly preferably 150% to 180%, of the size of the channel cross-sectional area F2 at the radially outer channel end 6a 2a Since the diameter d a2 the channel cross-sectional area F2 at the radially outer channel end 6a 2a with diameter d a3 the diameter d a2at this point 110% to 175%, especially up to 150%, of the width b E of the incision 3. The already mentioned diameter d1, d a1 corresponds to the diameter d a2 at the radially inner channel end 6a 2i , whereby these diameters are determined from the specified ratio of the size of the channel cross-sectional area F2 at the radially outer channel end 6a 2a to the size of the channel cross-sectional area F2 at the radially inner channel end 6a 2i and the size of the diameter d a3 result.

[0034] According to Fig. 2, the incision 3 in the embodiment shown further comprises a central incision zone 3z which is spaced apart from the incision edges 4, the channel-shaped incision base 7a and the channel-shaped incision edges 6a and forms a local bulge, which runs at least over the entire central section part 71 and preferably runs with a zone end section 3z' into the lateral section parts 72 and particularly preferably additionally into the raised incision sections 6.

[0035] The incision zone 3z, when viewed from the incision walls 5, has the shape of a rectangle elongated parallel to the tread periphery with semicircular rounded longitudinal ends. Fig. 3 the incision zone 3z runs in plan view perpendicular to the incision center line m E aligned cross-section (cf. position of lines III-III in Fig. 2 and course of the incision center line mE in Fig. 1), arcuate, with the incision zone 3z consisting of two with respect to the incision center area M E each in the form of an S-shaped curved curve with exactly one turning point running zone halves 3z1 and one on the incision center surface M E at the mutual connection of the zone halves 3z1, has the maximum deflection point Pz. According to Fig. 3, the incision zone 9z has a plane directed towards the incision center surface M E relative width bz determined in radial direction from 25% to 45%, in particular from 30% to 40%, of the maximum depth t E ( Fig. 2) of the incision 3, a plan view perpendicular to the incision center line m E (cf. Fig. 1) and the radially extending symmetry plane E, which coincides with the symmetry plane E1 Z1 ( Fig. 2) and a constant depth t determined in the radial direction Z2(cf. Fig. 2) running plane of symmetry E Z2 up. In Fig. 3 is the incision center area M E A straight reference line Lz is drawn between the radially outer end of the incision zone 3z and the radially inner end of the incision zone 3z. The incision zone 3z has, in plan view perpendicular to the incision center line m E viewed in the cross-section, in the plane of symmetry E Z2 one perpendicular to the reference line Lz and between the reference line Lz and the incision center surface M E determined, maximum deflection az of 0.5 mm to 1.5 mm. The incision zone 9z is formed by a projection 3z'' formed on one incision wall 5 and a corresponding recess 3z''' located on the other incision wall 5. "Corresponding" means that in the incision zone 3z the aforementioned width b E is present.

[0036] In the area outside the cutting zone 3z, the cutting walls 5 run perpendicular to the cutting center line m in plan view E viewed along a cross-section (cf. position of line III-III in Fig. 2), straight and in radial direction.

[0037] The invention is not limited to the described embodiment.

[0038] The incision 3 can be designed without an incision zone 3z. Furthermore, the incision 3, viewed in plan view, can be straight, curved continuously, or at least partially undulating. The incision 3 has at least one raised incision section 6, which—as in the exemplary embodiment—can be an edge-side incision section 6 or a central incision section spaced from the incision ends.

[0039] The incisions 3 can be formed in any profile positives bordered by grooves and extending to the tread periphery, thus also in circumferential tread ribs or shoulder-side tread blocks. The incisions 3 can end on one or both sides within the profile positives, so that they do not traverse the profile positives. Preferably, the incisions 3 traverse the profile positives, whereby, in the case of shoulder-side profile positives, traversing incisions 3 are understood to be those incisions that traverse the profile positives at least within the ground contact area. The ground contact area corresponds to the statically determined footprint (determined with a tire mounted on a standard rim, loaded at 70% of the maximum load capacity, internal pressure 85% of the standard pressure, according to ETRTO standards).

[0040] The incisions 3 run, viewed in plan view, at an angle of 0° to 60°, in particular from 10° to 50°, to the axial direction, whereby the angle for incisions 3 with a straight incision center line m E on the incision center line m E and for incisions 3 with non-straight incision center line m E on the mentioned, in plan view straight and between the ends of the incision center line m E running auxiliary line h E Furthermore, the incisions 3, viewed in plan view, preferably run parallel to one another at least in groups and in particular at least within the respective profile positive.

[0041] The incision base 7a can be designed conventionally, i.e. not channel-shaped.

[0042] Furthermore, the incision base 7a and the incision edge 6a can be channel-shaped and, viewed in a cross-section perpendicular to the respective channel center axis A1, A2, have a channel cross-sectional area F1, F2 whose shape differs from that described in the exemplary embodiment. For example, the channel cross-sectional areas F1, F2 can be independently oval or completely asymmetrical. "Completely asymmetrical" means that the channel cross-sectional areas F1, F2 do not have a plane of symmetry. List of reference symbols 1 central profile block 1a Block outer surface 2 grooves 3 incision 3z middle incision zone 3z' zone end section 3z'' lead 3z''' recess 3z1 zone half 4 cutting edge 5 cutting wall 6 raised cutting section 6a Incision edge 6a1 radial inner channel 6a2 tapered channel 6a 2a radial outer channel end 6a 2i radial inner channel end 6a3 radial outer channel 7 incision section 71 central section 7 1a Subsection 7 1b Subsection 72 side section 7a cutting base 8 Basic increase A1, A2 canal center axis a Z maximum deflection b E , b Z Width c E , c1, c7 length d1, d a1 , d a2 , d a3 diameter E1, E Z1 , E Z2 plane of symmetry F1, F2 channel cross-sectional area h E auxiliary line L Z Reference line m E Incision centerline M E Incision center area P Z maximum deflected point S2 arrow (direction of view) t E maximum depth t2, t z2 depth U Double arrow (circumferential direction) Z4 Detail α angle QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2014 210 823 A1

[0002]

Claims

[1] Vehicle tyre with a tread with profile positives (1) delimited by grooves (2) with cuts (3) running in plan view to the axial direction at an angle of 0° to 60°, each with two cut walls (5), a width (b) determined between these E ) from 0.30 mm to 2.00 mm and a maximum depth (t E ) from 70% to 100% of the profile depth, each cut (3), viewed in plan view, having at least one cut over its entire extent to the maximum depth (t E) extending into the recess (7a) and having a recess base (7a), and at least one raised recess section (6) adjoining the latter and formed radially outside a base elevation (8), wherein the raised recess section (6) has a channel-shaped recess edge (6a) delimiting the base elevation (8) in its interior and adjoining the recess base (7a), said channel-shaped recess edge (6a) having a channel central axis (A2) and a channel cross-sectional area (F2), wherein the channel-shaped recess edge (6a) projects beyond both recess walls (5) over its entire extent, viewed in a cross-section oriented perpendicular to the channel central axis (A2), characterized in that the channel-shaped recess edge (6a) has a tapered channel (6a2) with a radially outer channel end (6a 2a ) and a radially inner channel end (6a 2i) or is formed from the tapered channel (6a2), wherein the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) in the tapered channel (6a2) extends along the channel center axis (A2) from the radially outer channel end (6a 2a ) to the radially inner channel end (6a 2i ) is enlarged throughout and wherein the cut (3) is free of channels running towards the tread periphery and locally widening the cut (3). [2] Vehicle tyre according to claim 1, characterized by that the size of the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) at the radially inner channel end (6a 2i ) of the tapered channel (6a2) 120% to 200%, in particular at least 130%, preferably at least 140%, particularly preferably 150% to 180%, of the size of the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) at the radially outer channel end (6a 2a ) of the tapered channel (6a2). [3] Vehicle tyre according to claim 1 or 2, characterized by that the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) extends along the channel center axis (A2) from the radially outer channel end (6a 2a ) of the tapered channel (6a2) to the radially inner channel end (6a 2i ) of the tapered channel (6a2) is increased continuously, i.e. in a linear manner. [4] Vehicle tyre according to one of claims 1 to 3, characterized by that the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) is circular or oval. [5] Vehicle tyre according to claim 4, characterized by that the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) is circular and at the radially outer channel end (6a 2a ) of the tapered channel (6a2) has a diameter (d a2 ) from 110% to 175%, in particular up to 150%, of the width (b E ) of the incision (3). [6] Vehicle tyre according to one of claims 1 to 5, characterized by that the tapered channel (6a2) along the incision center surface (M E ) extending longitudinal section of the incision (5), forms a side flank laterally delimiting the base elevation (8) and, relative to the channel center axis (A2), runs straight and to the radial direction at an angle (α) of 2° to 35°, in particular of up to 25°, preferably of up to 20°, preferably of up to 15°, particularly preferably of up to 10°, most preferably of up to 5°. [7] Vehicle tyre according to one of claims 1 to 6, characterized by that the channel-shaped incision edge (6a) has a radially outer channel end (6a 2a) of the tapered channel (6a2) adjoining, radially outer channel (6a3), which forms a cover surface which delimits the base elevation (8) in the radial direction and runs parallel to the tread periphery, wherein the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) in the radially outer channel (6a3) corresponds to the channel cross-sectional area (F2) of the channel-shaped incision edge (6a) at the radially outer channel end (6a 2a ) of the tapered channel (6a2). [8] Vehicle tyre according to one of claims 1 to 7, characterized byin that the incision base (7a) is channel-shaped and has a channel central axis (A1), wherein the channel-shaped incision base (7a), viewed in a cross-section oriented perpendicular to the channel central axis (A1), projects beyond both incision walls (5) and has, at least at the connection to the channel-shaped incision edge (6a), a channel cross-sectional area (F1) corresponding thereto, wherein the channel cross-sectional area (F1) of the channel-shaped incision base (7a) has a preferably constant size and shape along the channel central axis (A1). [9] Vehicle tyre according to one of claims 1 to 8, characterized by that the channel-shaped incision edge (6a) has a radially inner channel end (6a 2i) of the tapered channel (6a2) adjoining, radially inner channel (6a1), which - with respect to the channel center axis (A2) - is continuously curved with a constant direction of curvature and runs radially outwards from the incision base (7a) of the incision section (7) and - in the case of a channel-shaped incision base (7a) with respect to the channel center axes (A1, A2) - preferably adjoins the channel-shaped incision base (7a) tangentially. [10] Vehicle tyre according to one of claims 1 to 9, characterized by that the incision (3) crosses the respective profile positive. [11] Vehicle tyre according to one of claims 1 to 10, characterized by that the incision (3) has a plan view perpendicular to the incision center line (m E ) and a plane of symmetry (E1) running in the radial direction. [12] Vehicle tyre according to one of claims 1 to 11, characterised in that the cut section (7) having the cut base (7a), viewed in plan view, has a central section part (71) extending in the form of a baseless, in particular isosceles trapezoid, and in particular two straight and aligned lateral section parts (72) and is particularly preferably composed of the central section part (71) and the lateral section parts (72). [13] Vehicle tyre according to one of claims 1 to 12, characterized bythat the incision (3) has at least one central incision zone (3z) which is spaced apart from the incision edges (4), the incision base (7a) and the or each channel-shaped incision edge (6a) and forms a local bulge, which, when viewed onto the incision walls (5), is elongated parallel to the tread periphery and, in plan view, is perpendicular to the incision center line (m E ) cross-section, is curved. [14] Vehicle tyres according to claims 12 and 13, characterized by that the central incision zone (3z) extends at least over the entire central section part (71) and preferably extends with a zone end section (3z') into each of the lateral section parts (72) and particularly preferably additionally into the or each raised incision section (6).

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