1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58inflation pressure monitoringICS 43.040.80; 83.160.10Road vehicles Safety enhancement in conjunctio
2、n with tyre BRITISH STANDARDBS ISO 21750:2006BS ISO 21750:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 April 2006 BSI 2006ISBN 0 580 48219 7The British Standards which implement international publications referred to in this documen
3、t may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Use
4、rs are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 18, an inside back co
5、ver and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesenquiries on
6、 the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.National forewordThis British Standard reproduces verbatim ISO 21750:2006 and implements it as the UK national standard.The UK participa
7、tion in its preparation was entrusted to Technical Committee AUE/4, Tyres and wheels for motor vehicles, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any Reference numberISO 21750:2006(E)INTERNATIONAL STANDARD ISO2
8、1750First edition2006-03-15Road vehicles Safety enhancement in conjunction with tyre inflation pressure monitoring Vhicules routiers Renforcement de la scurit conjointement avec le contrle de la pression de gonflage des pneumatiques BS ISO 21750:2006ii iiiContents Page Foreword iv Introduction v 1 S
9、cope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Symbols and abbreviations . 5 5 Technical requirements and test procedures for system. 5 5.1 General. 5 5.2 Tyre Pressure Alerting System (TPAS) 6 5.3 Tyre Pressure Warning System (TPWS). 8 5.4 Tyre Leak Alerting System (TLAS) 9 6 Tech
10、nical requirements and test procedures of system components . 10 6.1 General. 10 6.2 Wheel Fitted Component (WFC) 11 6.3 External car body Fitted Components (EFCs) . 15 6.4 Internal car body Fitted Components (IFCs) 15 7 Human Machine Interface (HMI) 15 7.1 Identification of controls, tell-tales and
11、 optical indicators. 15 7.2 Information to the driver 16 7.3 Owners manual information . 16 7.4 Compatibility with extended mobility systems17 8 Recommended inflation pressure limits 17 Bibliography . 18 BS ISO 21750:2006iv Foreword ISO (the International Organization for Standardization) is a world
12、wide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on t
13、hat committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in
14、 accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard
15、requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 21750 was prepared by Tec
16、hnical Committee ISO/TC 22, Road vehicles. BS ISO 21750:2006vIntroduction A pneumatic tyre is a flexible component which is deflected when loaded. A tyre needs to be sufficiently inflated in order to be used at a limited deflection adapted to carry the wheel load as part of an axle load at a given s
17、peed and to transmit the expected longitudinal and transversal forces. The deflection is at the origin of the fatigue of a pneumatic tyre. Repeated excessive deflection may lead to tyre failure. In real driving conditions, the physical parameter that most correlates to the tyre deflection is the tyr
18、e inflation pressure. Therefore, the inflation pressure surveillance of pneumatic tyres for road vehicles has been identified as a major way to increase the active safety of the vehicles in service and to reduce the risks for the users. The inflation pressure of pneumatic tyres for road vehicles sha
19、ll be set by the vehicle users according to the car manufacturers recommendations in coherency with the tyre standards which apply. The vehicle user is responsible for setting the correct tyre inflation pressure and its maintenance. One or more significantly under-inflated tyres reduce the vehicle p
20、erformances, especially the behaviour related to safety. Tyre pressures outside of the range recommended by the tyre or the vehicle manufacturer for the intended service may permanently alter the tyre characteristics up to a sudden pressure loss. This International Standard does not imply that the t
21、yre will resist under all circumstances before an alert is delivered by a Tyre Pressure Monitoring System (TPMS) described by this International Standard. The primary objective of a TPMS is to alert the driver when an unsafe condition related to incorrect tyre inflation pressure is detected. This In
22、ternational Standard contains proposals for the definition of terms used in both standardization working groups dealing with TPMSs and extended mobility systems. Both working groups are invited to make comments and proposals, the goal being to finally share these definitions. Each International Stan
23、dard should contain the definitions which are typical to its subject and refer to the other International Standards for the other definitions. BS ISO 21750:2006blank1Road vehicles Safety enhancement in conjunction with tyre inflation pressure monitoring 1 Scope This International Standard deals with
24、 electronic Tyre Pressure Monitoring Systems (TPMS) for tubeless tyres in association or not with an extended mobility system, with a reference pressure lower or equal to 375 kPa, fitted in single formation on four wheeled vehicles. The systems are able to survey all tyres in use but not necessarily
25、 those in temporary use and provide information to the driver. This International Standard establishes overall performance guidelines for the systems and their components, independently of the physical principles and the technological solution which have been selected to monitor the tyre pressure, t
26、o compute the difference to the requested level and to deliver a relevant information to the driver if the pressure of one, several or all tyres needs corrective action for the intended service conditions. 2 Normative references The following referenced documents are indispensable for the applicatio
27、n of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1000, SI units and recommendations for the use of their multiples and of certain other units ISO 2575, Road vehicles
28、 Symbols for controls, indicators and tell-tales IEC CISPR 22, Information technology equipment Radio disturbance characteristics Limits and methods of measurement IEC CISPR 24, Information technology equipment Immunity characteristics Limits and methods of measurement ASTM B 11773, Standard Method
29、of Salt Spray (Fog) Testing European Tyre information channel hardware; central information processing unit (CPU); and human machine interface (HMI). 3.8 Tyre Pressure Alerting System TPAS system and process of measuring the tyre inflation pressure and eventually internal temperature, or (a) paramet
30、er(s) that directly correlate(s) to the pressure and delivering an information to the driver that a tyre has reached a level of inflation pressure that requires a corrective action NOTE TPAS may also include a run-flat warning function. BS ISO 21750:2006 ISO 2006 All rights reserved 33.9 Tyre Pressu
31、re Warning System TPWS TPAS also able to provide useful information, at least the actual relative tyre pressure condition of each tyre, to the driver 3.10 Tyre Leak Alerting System TLAS system and process for detecting that the inflation pressure of one of the tyres in service has significantly chan
32、ged in comparison to the others and to the initial state, requiring a corrective action 3.11 Intelligent Tyre Pressure Management System ITPMS system which is able to monitor the pressure and the internal temperature of the tyre, to adapt the pressure by increasing or decreasing the actual pressure
33、in dependence on the real service conditions and to restore the correct pressure in case of pressure loss 3.12 false information information provided to the user which is not consistent with the systems specifications 3.13 learning phase working condition where necessary values for TPMS/TLAS (data,
34、parameter) are recognized, measured, and respectively verified to a sufficient statistical probability NOTE The learning phase can include active and passive sections. During the learning phase the alerting/warning sensibility increases from “zero” to target. 3.14 inflated mode normal working state
35、of a tyre, inflated at the cold inflation pressure recommended by the vehicle (or the tyre) manufacturer for the intended service 3.15 flat tyre running mode state of a tyre, part of an extended mobility system operating at an inflation pressure lower than 70 kPa 3.16 cold tyre inflation pressure ty
36、re pressure at ambient temperature, in absence of any pressure build-up due to tyre usage 3.17 minimum cold tyre inflation pressure minimum cold tyre inflation pressure, specified by the tyre standardization bodies for given service conditions 3.18 recommended cold tyre inflation pressure Precpressu
37、re recommended for each tyre position by the vehicle and/or the tyre manufacturer for the intended service conditions of the given vehicle NOTE Precis the same or higher than the minimum cold tyre inflation pressure. 3.19 set of recommended cold tyre inflation pressure recommended cold tyre inflatio
38、n pressure for the tyres of the front and the rear axle of a vehicle BS ISO 21750:20064 3.20 pressure reserve difference, for each tyre position, between the recommended cold tyre inflation pressure and the minimum cold tyre inflation pressure 3.21 normal load on a tyre load applied on an individual
39、 tyre by distributing to each axle its share of “kerb mass”, “accessory mass” and the “normal occupant mass” 3.22 maximum vehicle load on a tyre share of the maximum axle load allowed by the vehicle manufacturer which applies on an individual tyre 3.23 tyre load reserve for a given tyre at a given p
40、ressure, the difference between the maximum load allowed by the tyre manufacturers standards and the maximum vehicle load on the tyre 3.24 warning any indication to the driver to inform him that one element of the vehicle is no longer within the normal service conditions, and that a corrective actio
41、n is recommended 3.25 alarm any indication to the driver to inform him that one element of the vehicle is now in a situation where an immediate corrective action is necessary 3.26 nuisance status indication justified status indication that occurs at a frequency that distracts or annoys the vehicle o
42、perator and which could cause the vehicle operator not to take action when necessary 3.27 false warning or alarm anomaly of the system leading to an unjustified warning or alarm 3.28 tyre intended service conditions maximum expected load, speed and camber of a tyre in service for a given vehicle 3.2
43、9 wheel fitted component WFC enclosed device that measures physical parameters and conveys information to (downlink) a central unit fitted in the car body NOTE A WFC may also be equipped with an uplink channel which could carry the pressure on demand inputs or elsewhere. 3.30 external car body fitte
44、d component EFC enclosed device mounted on the body structure of the vehicle outside of the passenger compartment or boot which supports specific features of a TPMS and exchange information with WFC and/or IFC NOTE EFC may perform signal processing. BS ISO 21750:200653.31 internal car body fitted co
45、mponent IFC enclosed device mounted on the car body structure of the vehicle inside the passenger compartment or boot which supports specific features of a TPMS and exchanges information with WFC and/or EFC NOTE IFC may perform signal processing. 3.32 run-flat warning function possible additional fu
46、nction for a TLAS allowing it to warn the driver in the case where the vehicle is fitted with an extended mobility system (see 3.6) and this system is in the extended mobility mode 4 Symbols and abbreviations CPU Central Processing Unit EFC External car body Fitted Component EMC Electro-Magnetic Com
47、patibility FS Full Scale HMI Human Machine Interface IFC Internal car body Fitted Component ITPMS Intelligent Tyre Pressure Management System RF Radio Frequency TLAS Tyre Leak Alerting System TPAS Tyre Pressure Alerting System TPMS Tyre Pressure Monitoring System TPWS Tyre Pressure Warning System WF
48、C Wheel Fitted Component 5 Technical requirements and test procedures for system 5.1 General Any of the mentioned TPMS shall monitor the tyre pressures at speeds exceeding 25 km/h after a successful learning phase if it does exist.This learning phase will have a maximum duration of 30 min of cumulat
49、ive driving above 25 km/h. In the case it is not successful, the driver shall be warned by the malfunction tell-tale or optical indicator. The learning phase shall be activated only after the system reset (new tyre fitting, pressure adjustment). For all the tests, the TPMS shall be in their normal working state. BS ISO 21750:20066 Any of the mentioned TPMS shall avoid false warnings or alarms. A warning or an alarm felt as unjustified by the user cannot necessarily be considered as a false
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