1、BRITISH STANDARD AUTOMOBILE SERIES BS AU 250: 1993 ISO 7651:1991 Specification for Mounting dimensions of alternators, types1,2and3 for commercial vehicles and buses UDC 621.313.3:629.114.4/.5BSAU250:1993 This British Standard, having been prepared under the directionof the Automobile Standards Poli
2、cy Committee, waspublished under the authorityof the Standards Boardand comes intoeffecton 15July1993 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference AUE/13 Draft for comment 89/70182 DC ISBN 0 580 22405 8 Committees responsible for this British Stan
3、dard The preparation of this British Standard was entrusted by the Automobile Standards Policy Committee (AUE/-) to Technical Committee AUE/13, upon which the following bodies were represented: British Railways Board Bus and Coach Council Department of Health Department of Transport Department of Tr
4、ansport (Transport Research Laboratory) Freight Transport Association Health and Safety Executive Institute of Road Transport Engineers Lloyds Register of Shipping Ministry of Defence Road Haulage Association Ltd. Society of Motor Manufacturers and Traders Ltd. Coopted members Amendments issued sinc
5、e publication Amd. No. Date CommentsBSAU250:1993 BSI 09-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Dimensions and tolerances 1 Figure 1 Alternator, type 1 2 Figure 2 Alternator, type 2 3 Figure 3 Alternator, type 3 4 Table
6、 1 2 Table 2 3 Table 3 4 List of references Inside back coverBSAU250:1993 ii BSI 09-1999 National foreword This British Standard has been prepared under the direction of the Automobile Standards Policy Committee. It is identical with ISO7651:1991 Commercial vehicles and buses Mounting dimensions for
7、 alternators of types1,2 and3, published by the International Organization for Standardization (ISO) and in the development of which the United Kingdom played an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are res
8、ponsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard ISO 7467:1987 BS AU 227:1988 Specification for dimensions of cylindrical shaft ends and hubs fo
9、r alternators for commercial vehicles and buses (Identical) ISO 8854:1988 BS AU 232:1989 Methods of test and general requirements for road vehicle alternators with regulators (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an i
10、nside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BSAU250:1993 BSI 09-1999 1 1 Scope This International Standard specifies the mounting dimensions ne
11、cessary for interchangeability of hinge-mounted alternators for reciprocating internal combustion engines in commercial vehicles and buses. It applies to alternators of types1,2 and3, where type3 is designed only for mounting on rigid fixtures. It may be used for other engine applications where no s
12、pecific standards exist. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to
13、 agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 7467:1987, Commercial vehicles and buses Cyl
14、indrical shaft ends and hubs for alternators. ISO 8854:1988, Road vehicles Alternators with regulators Test methods and general requirements. 3 Dimensions and tolerances 3.1 Alternators with single hinge arm mounting 3.1.1 Alternator, type 1 An alternator with single hinge arm mounting of type1 shal
15、l have the dimensions shown inFigure 1 andTable 1. 3.1.2 Alternator, type 2 An alternator with single hinge arm mounting of type2 shall have the dimensions shown inFigure 2 andTable 2.BSAU250:1993 2 BSI 09-1999 Table 1 Figure 1 Alternator, type 1 Dimensions in millimetres Type A B E G L a M a 0,4 0,
16、5 H12 max. max. 1 A 56 9,9 90 10,2 under study under study a L and M are power-related dimensions and will be specified at a later stage. + 0,2 0,1 BSAU250:1993 BSI 09-1999 3 Table 2 3.2 Alternators with double hinge arm mounting: Alternator, type 3 An alternator with double hinge arm mounting of ty
17、pe3 shall have the dimensions shown inFigure 3 andTable 3. 3.3 Other dimensions and specifications Dimensions and requirements not given in this International Standard are left to the discretion of the manufacturer. Figure 2 Alternator, type 2 Dimensions in millimetres Type A B C D E F G L a M a 0,4
18、 0,5 0,5 H12 max. max. 2 A 80 21 16 32 93 90 10,2 under study under study 2 B 56 b 86 86 a L and M are power-related dimensions and will be specified at a later stage. b Only permitted for narrow mounting conditions and light-weight alternators. + 0,2 0,1 + 0,2 0,7 + 0,5 0,4 BSAU250:1993 4 BSI 09-19
19、99 Table 3 Figure 3 Alternator, type 3 Dimensions in millimetres Type A 1 A 2 B E G K a M b P R S b Approximate rated current c 0,5 0,5 H13 max. max. min. max. 12 V 24 V 3 A 20 to 30 30 to 40 90 60,5 to 65 under study 18 under study up to 110 A up to 65 A 3 B 16 110 12,2 85,5 to 90 20 20 between 65
20、A and 120 A 3 C d 120 85,5 to 90 20 between 65 A and 120 A 3 D 22 125 16,2 105,5 to 110 25 a K = space available to accommodate a range of mountings to allow interchangeability. b M and S are power-related dimensions and will be specified at a later stage. The value of S max. shall be agreed between
21、 engine manufacturer and alternator supplier with the definition of electric power output as stated in ISO8854. c Electrical characteristics are given only for guidance. d For additional cooling facilities.BSAU250:1993 BSI 09-1999 List of references See national foreword.BS AU 250: 1993 ISO 7651:199
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