摘要:
A method for indoor wear testing tires includes the steps of characterizing a vehicle and a wear test course and combining the characterized data to create input data for an indoor wear test machine. The input data allows the indoor wear test machine to accurately simulate an outdoor wear test course for the characterized vehicle. The method allows multiple wear test courses to be used with a single characterized vehicle and allows a single wear test course to be used with multiple characterized vehicles. The method allows tires to be wear tested in relatively short time periods in the controlled environment of the indoor laboratory. In addition, the method is relatively easy to set up and perform.
摘要:
An apparatus for determining lateral tire tread stiffness includes a holding fixture that is coupled to a loading fixture. The holding fixture includes a frame on which is mounted a rotary table that carries the tire tread specimen to be tested. The loading fixture includes a loading plate that can apply a normal loading force and a lateral loading force to the tire tread specimen. A processor receives data from a monitoring device which provides an indication of the deformation of the tire tread specimen as a lateral load is applied thereto. The processor also receives data from a load cell which monitors the amount of force applied to the tread specimen and correlates this data with the displacement data to determine stiffness properties of the tread specimen. The processor also controls the angular position of the rotary table to further analyze the tread stiffness of particular tire tread geometry.
摘要:
A system (10) for measuring the dynamic orientation of the plane of a wheel (12) on a vehicle (14). The system (10) includes a test surface (16) which rotates with the wheel (12) and a orientation-determining device (18) which is unattached to the vehicle (14). The test surface (16) is positioned in a plane corresponding to the plane of the wheel (12) and the orientation-determining device (18) determines the orientation of the plane of the test surface (12) at a specific point of time while the vehicle is being driven. A processor (20) receives output signals from the orientation-determining device (18) and converts the output signals into data corresponding to the orientation of the wheel plane for the specific instant in time.
摘要:
A method of developing a set of input forces used to analyze tire wear includes the steps of characterizing a wear course by driving a vehicle over the wear course and measuring data related to a plurality of forces experienced by the vehicle. A vehicle characterization model for a target vehicle having at least one tire is developed. The vehicle characterization model is used to calculate force data that represents the forces that would be experienced by at least one tire of the characterized vehicle if the characterized vehicle were driven over the characterized wear test course in the first vehicle configuration. The force data is then used to analyze tire wear using a computer prediction technique or by running an indoor wear test on the tire.
摘要:
A method for indoor wear testing tires includes the steps of characterizing a vehicle and a wear test course and combining the characterized data to create input data for an indoor wear test machine. The input data allows the indoor wear test machine to accurately simulate an outdoor wear test course for the characterized vehicle. The method allows multiple wear test courses to be used with a single characterized vehicle and allows a single wear test course to be used with multiple characterized vehicles. The method allows tires to be wear tested in relatively short time periods in the controlled environment of the indoor laboratory. In addition, the method is relatively easy to set up and perform.
摘要:
A powder dispensing/collection device for indoor testing of pneumatic tires includes a first outer housing (12) having an open end (24) facing a road wheel (94). First and second adjustable shrouds (28), (32) are disposed on an upper and lower portion of the outer housing respectfully. The shrouds are selectively moveable in a direction perpendicular to a width (w) of the outer housing. A second inner housing (48) is partially enclosed by the outer housing and has an open end (64) facing the road wheel which protrudes out from the outer housing a predetermined distance. At least one of the outer walls of the inner housing and the inner walls of the outer housing define a vacuum collection chamber (76). The inner housing is manually moveable within the outer housing so that the distance between the open end of the inner housing and the road wheel can be adjusted. A hose (78) extends through an aperture (80) in the inner housing and into the dispensing chamber. A spray nozzle (84) is connected to the free end of the hose. The position of the spray nozzle within the dispensing chamber is adjustable by manually moving the nozzle backward or forward within the inner housing. At least one vacuum duct (82a, 82b) is operatively connected to a rear wall (22) of the outer housing for transferring a vacuum force to the vacuum collection chamber.
摘要:
A method of fabricating a substantially rigid hardened wear surface for a tire tread wear testing apparatus is provided, the method comprising making a cast of a road surface on which tread wear of the tire is to be tested, providing a layer of adhesive mixed with at least one aggregate and configured for hardening to create the substantially rigid hardened wear surface, while the layer of adhesive is unhardened: (a) coating the layer of adhesive onto a road wheel of the tire tread wear testing apparatus, and (b) stamping an impression of the cast into the layer of epoxy adhesive for producing the wear surface adapted for emulating one or more surface roughness characteristics of the road surface.
摘要:
A tire testing apparatus that includes a test drum and at least one tire station. The test drum has an outer radial surface and a plurality of sectioned plates having outer radial test surfaces, wherein the plurality of sectioned plates mount on the outer radial surface of the test drum. The tire testing apparatus further includes at least one tire station having a selected tire with a tread, wherein the tread of the selected tire presses against the outer radial test surface of the plurality of sectional plates, and wherein the at least one tire station applies a force against the tread of the selected tire. Further, a tire testing method includes providing a selected tire having a circumferential tread and moving the selected tire against a rotating test drum having a plurality of sectional plates having a test surface. Further, the method includes maintaining contact between the selected tire and the plurality of sectional plates for a selected period of time, moving the selected tire away from the test drum, and evaluating the tread for wear.
摘要:
A method of tire testing comprising applying a drive torque to a tire and a wheel assembly about an axis of rotation to drive the tire and wheel assembly and a rotatable drum with the tire in rolling contact with the rotatable drum; controlling a load pressure of the tire against the rotatable drum; and adjusting a lateral position of the tire across a surface of the rotatable drum.
摘要:
A method of tire testing comprising applying a drive torque to a tire and a wheel assembly about an axis of rotation to drive the tire and wheel assembly and a rotatable drum with the tire in rolling contact with the rotatable drum; controlling a load pressure of the tire against the rotatable drum; and adjusting a lateral position of the tire across a surface of the rotatable drum.