Bsi bs au 217 1a 1987 (2000)

BRITISH STANDARD AUTOMOBILE SERIES BS AU 217 1a 1987 Incorporating Amendment No 1 Maximum road speed limiters for motor vehicles — Part 1 Specification for installed requirements UDC 629 11 585 7 BS A[.]

Incor por a ting

A mend ment No 1

U C 6 9.1 -5 5.7

This Bri shStan ard, ha ing

b en pre ared u der the

directonof the Automo ile

Stan ards Commi e ,was

published u der the authoriy

ofthe Bo rd of BSI an

comesinto fect on

2 Ma 1 8

© BSI 0 -2 0

The folowing BSI references

relate to the work on this

stan ard:

Commi e reference AUE/13

Draft for comment 8 / 75 3 DC

The prep ration of this BritishStand rd was entrusted b the Automobi e

Stand rds Commit e ( AUE/-) to Tech ical Commit e AUE/13, upon which

the folowing bodies were represented:

British Raiway s Board

Dep rtment of Transport( Hig hway s)

Freig ht Transport Association

Institute of Road Transport Eng ine r ( Incorporated)

Lond on Reg ional Transport

Ministry of Defence

National Bus Comp ny

Roa Haulag e Association Ltd

Society of Motor Man facturer and Tra er Limited

Am endm ents is ued sinc publ cation

Amd No Date of is ue Comments

5 6 Ju e19 8 Indicated b a sidelne in the marg in

Pag e

Section 1 General

Section 2 Perormance

Section 3 Instalation

Append ix A Test cond itions and procedure for

d emonstrating compl ance with spe d

Fig ure 1 — Allowed tolerances of lmiter

This Part of BS AU2 7 has be n prep red u d er the d irection of the Automobie

Stand rd s Commit e at the req uest of the Dep rtment of Transport

Part2 of BS AU2 7

1)

deals with requirements relating to the per ormance of

components of spe d lmiter dev ices

A British Stand rd do s not purport to include al the neces ary prov isions of a

contract User of British Stand rds are responsible for their cor ect a plcation

Compl anc with a British Stand rd does not ofitself confer imm unity

f om leg al o l g ations

Sum m ary of pag es

This d ocument comprises a f ont cov er, an inside f ont cov er, p g esi andi ,

p g es1 to4, an insid e b ck cov er and a b ck cov er

This stand ard has be n upd ated ( se copy rig ht d te) and ma hav e ha

amendments incorporated This wi l be ind icated in the amendment ta le on the

inside font cov er

1)

In pre araton

Section 1 General

1 Scope

This Part of BS AU2 7 specifies req uirements for

the perormance an instalation of dev ices

desig ned to lmit the ma imum roa spe d of motor

v ehicles b control of engine power

NOT 1 Unles otherwise refered to in clause 2, the de ice is

refer ed to here fter as the limier

NOT 2 Permi ed tolerances of the sy stem ma alow the

v hicle to e ce d the set sp ed

2 Definitions

For the purposes of this Part of BS AU2 7 the

fol owing d efinitions a ply

2.1

sensed spe d

the spe d of a motor v ehicle as indicated by , or

measured f om, the spe d sensing dev ice used as

p rt of the v ehicle’s road spe d lmiter

2.2

set spe d

the intended mean v ehicle spe d when operating in

a sta i z d condition in ac ord nce with3.3 It is

marked on the v ehicle and used for cal bration

purposes

2.3

V

min

the minimum spe d declared b the l miter sup l er

at which the l miter ma be set and me t the

requirements of this stand ard

2.4

V

ma

the ma imum spe d d eclared b the lmiter sup ler

at which the l miter ma be set and me t the

requirements of this stand ard

2.5

l miter suppler

in the case of ma imum roa spe d lmiter fit ed in

the cour e of construction of the v ehicle, the v ehicle

constructor In al other cases, the l miter

man facturer or his ag ent

2.6

l miter cal brator

the per on responsible for car y ing out the final

check of the instal ation an the cal bration

procedures( se clause6)

2.7

eng ine

the sour e( or sour es) of the v ehicle’s motiv e power

2.8

kerbside m as

the mas of a v ehicle when it car ies:

a) no per on; and

b) a ful sup ly of fuel in its tan , an ad eq uate

sup ly of other lq uids incid ental to its propulsion

and no load other than the lo se to ls and

eq uipment with which it is normal y equip ed

Section 2 Per orm a nce

3 Speed control on level g round

3.1 General

W hen tested in ac ord nce with the procedure g iv en

in Appendix A, the req uirements g iv en in3.2

and3.3 shal be met for each of the test ru s Spe d

shal be sensed to an ac uracy of within

±1.5mie/h( ±2.4km/ h) of actual v ehicle spe d

within the rang e V

min

to V

ma

3.2 Transient response( se Fig ure 1)

After the set spe d is fir t achiev ed:

a) sensed spe d shal not exce d the set spe d b

more than3mie/h( 4.8km/h);

b) the rate of chang e of sensed spe d shal not

exce d0.5m/s

2

; and

c) the sta i z d spe d conditions specified in3.3

shal be at ained within10s of fir t reaching the

set spe d

3.3 Sta i ized spe d ( se Fig ure 1)

W hen sta le spe d control has be n achiev ed:

a) sensed spe d shal not d ifer f om the set spe d

b more than2mi e/h( 3.2 km/h);

b) sensed spe d shal not v ary b more

than2mie/h( 3.2km/h); and

c) the rate of chang e of sensed spe d shal not

exce d0.2m/s

2

4 Speed control on descending

g ra dients

W hen the v ehicle, run ing at its set spe d and with

the driv er’s ac elerator at its position of ma imum

trav el, is subject to an ac elerating for e due to a

down g rad ient, the l miter shal control spe d b

restricting the eng ine power to the l miter’s

minimum eng ine power control set ing

NOT The limier ma alow normal ac elerator control for the

purp ses of g ear chang ing

5 Fa ilur modes

No malfunction of the l miter shal result in an

inc ease in engine power a ov e that d emanded b

the position of the d riv er’s ac elerator

6 Checking a nd ca libration

The l miter sup l er shal prov ide documentation

d es ribing checking and cal bration proced ures It

shal be pos ible to check the set spe d whist the

v ehicle is stationary

Section 3 Instal ation

7 General

The l miter shal be suita le for instalation in the

v ehicle and shal be instal ed in ac ord nce with the

l miter sup l er’s tech ical instructions

8 Tamper- proofing

The l miter and its con ections neces ary for its

operation, except those es ential for the run ing of

the v ehicle, shal be ca a le of being protected f om

any u authoriz d ad justments or the inter uption

of its energ y sup ly b the at achment of sealng

dev ices and/or the ne d to use special to ls

9 Power supply

All components neces ary for the ful fu ction of the

lmiter shal be energ iz d whenev er the v ehicle is

being driv en

The v ehicle shal be marked with the fol owing

a) The name or trad e mark of the lmiter

calbrator

b) The number and d te of this BritishStand ard,

i.e BS AU2 7-1a:19 7

c) The set spe d , ex res ed in mie/h, at which the

v ehicle is calbrated

N T Set sp ed ma add itonaly b shown in km/h

Fig ure 1 — Allowed toleranc s of lm iter response characteristic

Appendix A Test conditions and

procedur for demonstra ting

compl ance with speed control

NOT W here the limier is desig ned for fi ing to a rang e of

v hicles,i is recommen ed that the tests are p rormed on a

“wor t case” v hicle, so that the ne d for ad i onal testng is

minimized Ex mples of wor t case siuatons are as folows

a) Ma imum eng ine p wer to mas rato of the tested v ehicle

at V

ma

+1 %

b) Lowest ov eral g earing which alows the set sp ed to b

atained , i.e.minimum v hicle sp ed to eng ine sp ed in to

g ear rato

c) W here the limier actuator is a se arate comp nent in the

eng ine p wer control,the minimum tra el of the actuator

b twe n ma imum an minimum eng ine p wer control

p si ons

A.1 Am bient weather conditions

Mean wind spe d shal be les than6m/s with g usts

not exce d ing10m/s The test sur ace shal be fe

f om standing water, snow or ice

A.2 Vehicle condition

The v ehicle shal be at its kerbside mas , plus the

mas of the driv er an any observ er and test

eq uipment The ty res shal be nominaly new,

i.e neg lig ible wear, and inflated to the pres ure

recommended b the v ehicle man facturer for

operation at the v ehicle’s ma imum g ros weig ht

The power train components shal be within their

normal operating temperature rang es

A.3 Sur ac condition

The test sur ace shal be suita le to ena le

sta i z d spe d to be maintained , and shal be fe

f om u ev en p tches Gra ients shal not

exce d2 % and shal not v ary b more than1%,

exclud ing camber efects

A.4 Instrum entation

During the test, the instantane us actual v ehicle

spe d and sensed spe d shal be contin ously

recorded

NOT 1 I is recommen ed that the ac uracy of recorded

me sured sp eds should b ±0.2% ag ainst a tme b se acurate

to wihin0.3%

NOT 2 To o tain an acurate me sure of v hicle sp ed,a

n mb r of ste dy sp ed ru s in the rang e V

min

to V

ma

ma b

ne ded (using the limier to pro ide these ste dy sp eds if

conv enient).The ru s should b p rormed o er a k own

distance an the tme taken to co er this distance recorded From

the data colected calculatons can then b made of the ratos

b twe n recorded sp eds an deriv d sp eds,their me n an

stan ard de iatons

A.5 Proc dure

Driv e the v ehicle at a spe d equal to9 % of the set

spe d , an d eman ful eng ine power b mov ing the

ac elerator to its position of ma imum trav el as

ra id ly as pos ible Maintain the ac elerator at its

position of ma imum trav el for not les than3 s

Cond uct the test thre times in each gear, which

alows the set spe d to be reached

Publica tion referred to

BSAU2 7, Ma ximum r oa d spe d lmi er s fr moto vehicle

BSAU2 7-2, Spe ifica tion fr per for ma nc o components

)

2)

Refered to in the foreword only

3 9 Chiswick Hig h Roa

London

W 4 4AL

BSI is the independent national bod y responsible for prep ring

BritishStand ard s It presents the UK v iew on stand ard s in Europe an at the

international lev el It is incorporated b Roy al Charter

Revisions

BritishStand ards are up ated b amendment or rev ision User of

BritishStand ard s should make sure that they pos es the latest amendments or

editions

It is the constant aim of BSI to improv e the qual ty of our products and serv ices

W e would be g rateful if any one find ing an inac uracy or ambig uity whi e using

this BritishStand rd would inform the Sec etary of the technical commit e

responsible, the identity of which can be fou d on the inside f ont cov er

Tel:0208 9 9 0 Fa :0208 9 7 0

BSI ofer member an indiv id ual up ating serv ice caled PLUS which ensures

that subs riber automaticaly receiv e the latest editions of stand rds

Buying standards

Order for al BSI, international an foreig n stand ard s publcations should be

a d res ed to Customer Serv ices Tel:0208 9 9 01 Fa :0208 9 7 01

In response to ord er for international stand rd s, it is BSI pol cy to sup ly the

BSI implementation of those that hav e be n publ shed as BritishStand rds,

unles otherwise requested

Inform ation on standards

BSI prov id es a wide rang e of information on national, European and

international stand rds throug h its Library and its Tech ical Help to Ex orter

Serv ice Various BSI electronic information serv ices are also av aia le which g iv e

d etais on al its prod ucts an serv ices Contact the Information Centre

Tel:0208 9 71 1 Fa :0208 9 7 4

Subs ribing member of BSI are kept up to d te with stand rd s dev elopments

and receiv e substantial d is ou ts on the pur hase price of stand rds For d etai s

of these and other benefits contact Member hip Ad ministration

Tel:0208 9 7 02 Fa :0208 9 7 01

Co yrig ht

Copy rig ht subsists in al BSI publcations BSI also holds the copy rig ht, in the

UK, of the publcations of the international stand ardization bod ies Except as

permit ed u der the Cop rig ht, Desig ns and Patents Act 19 8 no extract ma be

reproduced , stored in a retriev al sy stem or transmit ed in any form or b any

means – electronic, photocopy ing , recording or otherwise – without prior writ en

permis ion fom BSI

This do s not preclude the fe use, in the cour e of implementing the stand ard,

of neces ary detai s such as sy mbols, and siz , ty pe or g ra e d esig nations I these

d etais are to be used for any other purpose than implementation then the prior

writ en permis ion of BSI must be obtained

I permis ion is g ranted, the terms ma includ e roy alty p y ments or a lcensing

ag re ment Detais and a v ice can be obtained f om the Copy rig ht Manag er

Tel:0208 9 7 7