32 results about "Unpaved road" patented technology

To provide a pneumatic tire which is suitable as a tire for running on unpaved roads and has improved running performance on unpaved roads, wear resistance, and handling stability. In the tread portion (1), there are shoulder blocks (13s), intermediate blocks (13m) divided by multiple longitudinal grooves (11) extending along the tire ), the respective treads of the central block (13c) form shallow grooves (20) whose groove depth is smaller than that of the longitudinal grooves (11) and transverse grooves (12), so that the shallow grooves (20) extend along the tire width direction , and make at least one end communicate with the longitudinal groove (11) or the transverse groove (12), set at least one bending point (P) on the contour line of the shallow groove (20), and set it on the flat bottom surface of the shallow groove (20) The sipe (30) extending along the shallow groove (20) in which the central shallow groove (21) formed in the central block (13c) is provided with a terminal portion terminating in the central block (13c) (T).

Provided is a pneumatic tire having improved noise performance and improved traveling performance on unpaved roads. In the present invention, a pair of main grooves 10 arranged on the respective sidesof the tire equator CL and extending in the tire circumferential direction are configured such that a series of bent elements 12 formed by connecting at least five linear groove sections 11 via bending points are continuously and repeatedly arranged in the tire circumferential direction. The at least five linear groove sections 11 included in each of the bent elements 12 have three of more different angles of inclination with respect to the tire circumferential direction, and have five or more different lengths.

The present invention provides a pneumatic tire that is suitable for use as a tire for traveling on unpaved roads, and that improves traveling performance and damage resistance on unpaved roads. Center blocks 10, which are provided in a center region of a tread section 1, are arrayed so as to form a pair of center blocks 10 between which there are interposed inclined grooves 30 that extend in an inclined direction with respect to a tire circumferential direction. The center blocks 10 are made to extend so as to straddle a tire equator CL from one side to the other side of the tire equator CL.Notches 11, which are each composed of a first wall 11a and a second wall 11b connected to each other in a V shape, are provided in treads in each center block CL. The first walls 11a are made to extend at an angle within + / -20 degrees with respect to the tire circumferential direction; the second walls 11b are made to extend at an angle of + / -10 degrees with respect to a tire width direction; andthe average angle of sipes, which are respectively formed in the center blocks 10 and shoulder blocks 20, lies within 90 degrees + / -10 degrees in a first region C, lies within 130 degrees + / -10 degrees in a second region M, and lies within 70 degrees + / -10 degrees in a third region S with respect to the tire equator CL. Each sipe is configured to have at least one curved portion.

The present disclosure relates to methods and apparatus for anticipating all-wheel drive engagement and four-wheel drive engagement. A system includes a processor configured to automatically engage all-wheel drive (AWD) when a vehicle reaches an area along a route that is pre-marked as slippery in a memory in communication with the processor. . Said marking may eg have occurred based on the presence of unpaved roads or precipitation in said area.

Provided is a pneumatic tire in which travel performance on unpaved roads is efficiently increased. In this pneumatic tire: a center block 23 and shoulder blocks 22 are provided in a tread section 1;side blocks 21 are provided in sidewall sections 2; and groove elements 31, 32, 33 comprising narrow grooves and / or sipes are provided in the surfaces of each of the blocks. A series of transverse groove groups 30 are configured from first groove elements 31 provided in the side blocks 21, second groove elements 32 provided in the shoulder blocks 22, and third groove elements 33 provided in the center block 23, the series of transverse groove groups 30 extending continuously along the blocks from the side block 21 on one side in the tire width direction to the side block 21 on the other side,spanning main grooves 11 or auxiliary grooves 13.

An apparatus and method of controlling a power window by using an output current of a driving motor. The output current is measured to calculate and store a current reduction time, and then, execution of a safety function is delayed when an interruption in ascending of the window glass is sensed, so that interruption caused by noise generated when a car moves over an unpaved road or road bumps may be distinguished from interruption caused by an actual obstacle. Then, the safety function is prevented from being executed if the interruption in the ascending of the window glass is caused by the noise. Therefore, the interruption of the ascending of window glass due to the noise generated when the car moves on the unpaved road or road bumps may be distinguished without using an additional sensor.

Provided is a pneumatic tire that is suitable for use as a tire for traveling on unpaved roads and that improves traveling performance on unpaved roads. Center blocks 10, which are provided in a center region of a tread section 1, are arrayed so as to form a pair of center blocks 10 between which there are interposed inclined grooves 30 that extend in an inclined direction with respect to a tire circumferential direction. The center blocks 10 are made to extend so as to straddle a tire equator CL from one side to the other side of the tire equator CL. Notches 11, which are each composed of a first wall 11a and a second wall 11b connected to each other in a V shape, are provided in treads in each center block CL. The first walls 11a are made to extend at an angle within + / -20 degrees with respect to the tire circumferential direction; the second walls 11b are made to extend at an angle of + / -10 degrees with respect to a tire width direction; and third walls 21 that each face a notch 11of a shoulder block 20 provided in a shoulder region of the tread section 1 are made to extend at an angle within + / -5 degrees with respect to a straight line A that connects an end point P1 of the first wall 11a on the shoulder block 20 side and an end point P2 of the second wall 11b on the shoulder block 20 side.

Provided is a pneumatic tire that is favorable for traveling on an unpaved road and shows improved traveling performance and anti-wear performance on an unpaved road. Of a plurality of blocks 13 formed in a tread portion, at least three blocks 13 that include an outermost block 13o located outermost in a tire width direction and are adjacent to each other in the tire width direction, and at leasttwo vertical grooves 11 located between these blocks 13, are arranged on a platform 15 that protrudes from a groove bottom of a horizontal groove 12, has a flat top surface, and projects to either side in a tire circumferential direction with respect to the at least three blocks 13, and a bottom raising portion 16 protruding from a groove bottom of the vertical groove 11 adjacent to the outermostblock 13o is provided on the groove bottom of the vertical groove 11, to connect the outermost block 13o to the block 13 adjacent to the outermost block 13o.

A problem with unpaved roads is that can be prone to damage when driven on. The invention provides surface matting for addressing this, comprising a first mat (1a) and a second mat 1b, each mat having a series of substantially parallel beams (2), a plurality of spine rods 3 that run substantially perpendicular to and through the beams and connect the beams to one another. Each mat also has a joiner (7) adjacent an edge of the mat, arranged so that one of the spine rods passes through the joiner. The matting is such that the first and second mats are connected to one another by way of a connecting rod 8 that passes through and connects the joiner (8) of one mat to the joiner of the other mat.

Provided is a pneumatic tire that, even when the tire has an asymmetric pattern, enables uniformity and weight balance of the tire to be satisfactorily maintained while improving traveling performance in a unpaved road. Side blocks 30 are respectively provided to side regions adjacent to the outside in the tire width direction of the outermost end section of a tread part 1 in the tire width direction. The number N1 and the total area SS1 of the side blocks 30 provided to a first side region positioned on one side in the tire width direction, the number N2 and the total area SS2 of the side blocks 30 provided to a second side region positioned on the other side in the tire width direction, the land section area TS1 in a first tread region positioned on the first side region side of the tread part 1, and the land section area TS2 in a second tread region positioned on the second side region side of the tread part 1 satisfy the relationships of N1>N2 and TS1>TS2, and 0.95 <= (SS1xTS1) / (SS2xTS2) <= 1.05.

The present invention provides a pneumatic tire capable of improving snow traction performance while maintaining good running performance on an unpaved road surface and uneven wear resistance performance. The lug grooves (20, 30) are alternately arranged, and the lug grooves (20, 30) are composed of: a first groove portion (21, 31) crossing the tire equator CL and extending in the tire width direction; The second groove portion (22, 32) is inclined from one end of the first groove portion (21, 31) at an angle smaller than the angle of the first groove portion (21, 31) relative to the tire circumferential direction and extends to one side of the tire equator The other end of the first groove portion (21, 31) communicates with the second groove portion (32, 22) Arranging the first groove portion (21, 31) at a position closer to the tread side than the end portion of each lug groove (20, 30) on the tread end E side, with the second groove portion (22, 32) The second groove portion (22, 32) is bent or bent in such a manner that the average angle θa in the inner region A is smaller than the average angle θb in the outer region B, and the second grooves to be adjacent in the tire circumferential direction Circumferential thin grooves (40) and lug grooves (20, 30) connecting the portions (22, 32) to each other demarcate the tread of the block (50) forming a shallow groove (60) having at least one inflection point.