ISO 16992:2018 乗用車用タイヤ—スペアユニット代替機器（SUSE） | ページ 6

3.1

tyre

pneumatic tyre which is a flexible component of the wheel assembly made of rubber and reinforcing materials

Note 1 to entry: Inflating the tyre with compressed gas, as described in 5.1, enables the tyre to carry the wheel load as a part of an axle load and to transmit longitudinal and transversal forces. In the unladen condition, the inflated tyre is essentially toroidal.

3.2

run-flat tyre

self supporting tyre

SST

tyre structure provided with any technical solutions (for example, reinforced sidewalls, etc.) designed to operate in an inflated mode and allowing the tyre, mounted on the appropriate wheel and in the absence of any supplementary component, to supply the vehicle with the basic tyre functions at a specified speed and distance when operating in flat tyre running mode, able to successfully complete the endurance test as described in 7.1

3.3

extended mobility tyre

EMT

tyre featuring on purpose technology designed to operate in an inflated mode and allowing the tyre, mounted on the appropriate wheel and in the absence of any supplementary component, to supply the vehicle with the basic tyre functions at a specified speed and distance when operating in flat tyre running mode, able to successfully complete the endurance test as described in 7.2

3.4

internal support

device, resting on the rim, that helps supply the vehicle with basic tyre functions when operating in flat tyre running mode which allows the tyre to successfully complete the endurance test as described in 7.1

3.5

spare unit

assembly of a tyre and a wheel intended to replace a tyre/wheel assembly already fitted on a vehicle that has lost some functional efficiency

Note 1 to entry: The tyre/wheel assembly can include a tube and a valve, etc.

3.6

spare unit substitutive equipment

SUSE

equipment intended to maintain or restore, but not replace, the basic functions of a tyre in the event of a tyre/wheel assembly failure

3.7

SUSE system

assembly of specified functionally dependent components including, but not limited to, a tyre and a run-flat warning system, which together provide the specified performance granting extended mobility to a vehicle thus, equipped as described in 6.2

Note 1 to entry: This definition was previously titled “extended mobility system” in 16992:2010.

Note 2 to entry: Examples which do not meet this document are shown in Annexes A and B.

3.8

inflated mode

normal working state of a tyre, inflated at the cold inflation pressure recommended by the vehicle manufacturer or the tyre manufacturer for the intended service

3.9

loss of tyre functional efficiency

pressure loss of the tyre/wheel assembly which results in operation in flat tyre running mode and which could be rapid, slow or uncontrolled, leading to a reduction of basic tyre function

3.10

flat tyre running mode

state of a tyre while operating at an inflation pressure between 0 kPa and 70 kPa

3.11

run-flat warning system

RFWS

system which delivers information to the driver that a tyre is operating in the flat tyre running mode

Note 1 to entry: In addition, an RFWS can also warn the driver when the expected run-flat potential of the SUSE system has been used.

3.12

tyre pressure monitoring system

TPMS

system fitted on a vehicle, able to perform a function to evaluate the inflation pressure of the tyres or the variation of this inflation pressure over time and to transmit corresponding information to the user while the vehicle is running

3.13

significant reduction of the tyre inflation pressure

event leading a tyre to operate at an inflation pressure insufficient for the intended service on a given vehicle

Note 1 to entry: The intended service comprises the load, speed and camber.

3.14

restored mobility

operating condition of a vehicle that, following the loss of tyre functional efficiency, is recovered by manual deployment of a SUSE after an immediate stop

3.15

preserved mobility

operating condition of a vehicle that, following the loss of tyre functional efficiency, is recovered automatically by means of a SUSE

3.16

extended mobility

operating condition of a vehicle that, following the loss of tyre functional efficiency, is provided by means of a SUSE system

3.17

basic tyre functions

normal capability of an inflated tyre to support a given load up to a given speed and to transmit the driving, the steering and the braking forces to the ground on which it runs