1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 3888-2:2011Passenger cars Test trackfor a severe lane-changemanoeuvrePart 2: Obstacle avoidanceBS ISO 3888-2:2011 BRITISH STANDARDNational forewordThis British Standard is
2、 the UK implementation of ISO 3888-2:2011. Itsupersedes BS ISO 3888-2:2002 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/15, Safety related to vehicles.A list of organizations represented on this committee can beobtained on request to its secretar
3、y.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 72780 1ICS 43.100; 43.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publis
4、hed under the authority of theStandards Policy and Strategy Committee on 31 March 2011.Amendments issued since publicationDate Text affectedBS ISO 3888-2:2011Reference numberISO 3888-2:2011(E)ISO 2011INTERNATIONAL STANDARD ISO3888-2Second edition2011-03-15Passenger cars Test track for a severe lane-
5、change manoeuvre Part 2: Obstacle avoidance Voitures particulires Piste dessai de dbotement latral brusque Partie 2: vitement dobstacle BS ISO 3888-2:2011ISO 3888-2:2011(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be print
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8、suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
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10、11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rights reservedBS ISO 3888-2:2011ISO 3888-2:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Specifi
11、cations 1 4.1 Dimensions of the obstacle avoidance track .1 4.2 Marking of the obstacle avoidance track2 Annex A (informative) Test method 4 BS ISO 3888-2:2011ISO 3888-2:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation
12、 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 that committee.
13、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 accordance wit
14、h 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 requires approv
15、al 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 3888-2 was prepared by Technical Committ
16、ee ISO/TC 22, Road vehicles, Subcommittee SC 9, Vehicle dynamics and road-holding ability. This second edition cancels and replaces the first edition (ISO 3888-2:2002), of which it constitutes a minor revision. ISO 3888 consists of the following parts, under the general title Passenger cars Test tra
17、ck for a severe lane-change manoeuvre: Part 1: Double lane-change Part 2: Obstacle avoidance BS ISO 3888-2:2011ISO 3888-2:2011(E) ISO 2011 All rights reserved vIntroduction The main purpose of this International Standard is to provide repeatable and discriminatory test results. The dynamic behaviour
18、 of a road vehicle is a very important aspect of active vehicle safety. Any given vehicle, together with its driver and the prevailing environment, constitutes a closed-loop system that is unique. The task of evaluating the dynamic behaviour is therefore very difficult since the significant interact
19、ion of these driver-vehicle-environment elements are each complex in themselves. A complete and accurate description of the behaviour of the road vehicle must necessarily involve information obtained from a number of different tests. Since this test method quantifies only one small part of the compl
20、ete vehicle handling characteristics, the results of these tests can only be considered significant for a correspondingly small part of the overall dynamic behaviour. Moreover, insufficient knowledge is available concerning the relationship between overall vehicle dynamic properties and accident avo
21、idance. A substantial amount of work is necessary to acquire sufficient and reliable data on the correlation between accident avoidance and vehicle dynamic properties in general and the results of these tests in particular. Consequently, any application of this test method for regulation purposes wi
22、ll require proven correlation between test results and accident statistics. BS ISO 3888-2:2011BS ISO 3888-2:2011INTERNATIONAL STANDARD ISO 3888-2:2011(E) ISO 2011 All rights reserved 1Passenger cars Test track for a severe lane-change manoeuvre Part 2: Obstacle avoidance 1 Scope This part of ISO 388
23、8 defines the dimensions of the test track for a closed-loop, severe lane-change manoeuvre test for subjectively determining the obstacle avoidance performance of a vehicle, one specific part of vehicle dynamics and road-holding ability. It is applicable to passenger cars as defined in ISO 3833 and
24、light commercial vehicles up to a gross vehicle mass of 3,5 t. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document
25、 (including any amendments) applies. ISO 3833:1977, Road vehicles Types Terms and definitions 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 3833 apply. 4 Specifications 4.1 Dimensions of the obstacle avoidance track The track for the severe lane-ch
26、ange obstacle avoidance manoeuvre shall be as shown in Figure 1 and the dimensions shall be as given in Table 1. The test vehicle shall be driven through this track. The lengths of track sections are fixed, while the track width, b, is a function of vehicle width. The total length of the track shall
27、 be 61 m. BS ISO 3888-2:2011ISO 3888-2:2011(E) 2 ISO 2011 All rights reservedKey 1 section 1 2 section 2 3 section 3 4 section 4 5 section 5 6 driving direction 7 lane offset Figure 1 Obstacle avoidance track with designation of sections Table 1 Obstacle avoidance track dimensions Dimensions in metr
28、es Section Length Lane offset Width b 1 12 1,1 vehicle width + 0,25 2 13,5 3 11 1 vehicle width + 1 4a12,5 5 12 1,3 vehicle width + 0,25, but not less than 3 m aTo ensure high lateral accelerations at the end of the track, section 4 is 1 m shorter than section 2. 4.2 Marking of the obstacle avoidanc
29、e track The obstacle avoidance track shall be marked with cones of a minimum height of 500 mm (see Figure 2). The cones shall be placed at the points shown in Figure 3, and the track limits shall be tangential to the base circles of the cones. BS ISO 3888-2:2011ISO 3888-2:2011(E) ISO 2011 All rights
30、 reserved 3Dimensions in millimetres Key 1 base circle of cone Figure 2 Cone used for obstacle avoidance track delimitation Key 1 section 1 5 section 5 2 section 2 6 driving direction 3 section 3 7 lane offset 4 section 4 NOTE Letters indicate placement of individual cones. Figure 3 Placing of cones
31、 for marking obstacle avoidance track BS ISO 3888-2:2011ISO 3888-2:2011(E) 4 ISO 2011 All rights reservedAnnex A (informative) Test method A.1 Principle of the obstacle avoidance manoeuvre The obstacle avoidance manoeuvre is a dynamic process which involves rapidly driving a vehicle from its initial
32、 lane to another lane parallel to the first, and returning to the initial lane, without exceeding lane boundaries. The objective is to have the vehicle reach a certain sequence of alternate high, lateral accelerations such that the vehicles lateral dynamics can be evaluated. A.2 Example test procedu
33、re A.2.1 Typical use The obstacle avoidance track test shall be undertaken by skilled drivers. A passage is considered faultless when none of the cones positioned in accordance with 4.2 has been displaced. A typical use of this test is the subjective evaluation of vehicles. A.2.2 Procedure a) Enter
34、section 1 with the highest gear position that guarantees a minimum engine speed of 2 000 r/min (for vehicles with automatic transmission, place selector lever in the drive position, D). b) At 2 m after entering section 1 (see Figure A.1), release the throttle and drive the remaining distance in the
35、throttle-released position. In order to keep the test procedure as reproducible as possible, the initial longitudinal velocity of the vehicle is to be measured at the end of section 1 and mentioned in the test report. A.2.3 Limitations Owing to driver influence (driving strategy) in this closed loop
36、 test, there is no possibility of an objective measurement of vehicle dynamics data; only subjective evaluation is recommended. The different paths followed in different tests bring about a considerable scatter in measured velocities. Although longitudinal dynamics are restricted (throttle-off 2 m a
37、fter entering section 1), this does not lead to the desired minimization of the measured velocities. Therefore, no ranking on the basis of the vehicle velocity and no minimum velocity limit for vehicles is permitted. NOTE Because of these limitations, this part of ISO 3888 defines only the dimension
38、s of the test track for the subjective evaluation of vehicle dynamics. BS ISO 3888-2:2011ISO 3888-2:2011(E) ISO 2011 All rights reserved 5Dimensions in metres Key 1 section 1 2 section 2 3 section 3 4 section 4 5 section 5 6 throttle off 7 measurement of the longitudinal velocity 8 driving direction
39、 Figure A.1 Throttle-off and measurement of vehicle longitudinal velocity BS ISO 3888-2:2011ISO 3888-2:2011(E) ICS 43.100; 43.180 Price based on 5 pages ISO 2011 All rights reserved This page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand o
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