Tiêu chuẩn iso 15501 2 2016

© ISO 2016 Road vehicles — Compressed natural gas (CNG) fuel systems — Part 2 Test methods Véhicules routiers — Systèmes d’alimentation en gaz naturel comprimé (GNC) — Partie 2 Méthodes d’essai INTERN[.]

Road vehicles — Compressed natural

Part 2:

Vé icule s ro tiers — S stème s d’alimentation en g z n ture l

comprimé (GNC) —

Partie 2: Méth de s d’e ssai

S con edition

2 16-1 -1

Refer ence n mb r

ISO 1 5 1-2:2 16(E)

COPYRIGHT PROTECTED DOCUMENT

© ISO 2016, P blshed in Sw itz rlan

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F reword i v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms an definitions 1

4 Test metho s 2

4.1 C ln e mou ting s r eng th tests 2

4.1.1 General 2

4.1.2 Ine tia tes 2

4.1.3 Static tes 2

4.1.4 A lte native method 3

4.1.5 A cc ptanc c ite ia 3

4.2 Leak tes 3

4.3 Fu ctional tes 4

4.3.1 Main sh t-of v lve tes 4

4.3.2 Re eptacle clear anc tes 4

4.4 Re eptacle mounting tests 4

A nne x A (informative)Eng ine r ing e x per ienc e for the mou ting of ste l cylnder s 5

Biblog raphy 9

ISO (he Int ernational Org nization for Stan ardization) is a worldwidefede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sponsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

For an ex lanation on the meaning of ISO spe ific t erms an ex r s ions r lated to conformity as es ment,

as wel as information a out ISO’s adhe enc to the Wor ld Trade Org nization (WTO) principles in the

Te h ical Bar ie s to Trade (TBT) se the folowing URL: www.iso.org/ iso/for word.html

The committ ee r sp nsible for this document isISO/TC 2 , Ro d vehicles , Subcommitt ee SC 41, S ec ific

as pec ts fr g seo s f els

This se on edition canc ls an r plac s the f irs edition (ISO 1 5 1- 2:2 0 ), w hich has be n t ech icaly

r vised

A l s of al p rt in theISO 1 5 1 se ies can be fou d on the ISO websit e

Road vehicles — Compressed natural gas (CNG) fuel

Part 2:

This document spe ifies the t es methods for che king the minimum safety r q ir ment spe if ied in

ISO 1 5 1-1 It isa pl ca le t o the fu ctionalty of the fuel sy st ems designed t o o e at e on compr s ed

natural g s of mot or vehicles as defined in ISO 3 3

NOTE F or t ests of in ivid al components, refer to the parts of ISO 1 5 0, ISO 14 69 an ISO 1 43

2 Normati ve r eferences

The folowing document ar r fe r d t o in the t ext in such a wa that some or al of their cont ent

cons itut es r q ir ment of this document F r dat ed r fe enc s, only the edition in icat ed a ples F or

un at ed r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment ) a ples

ISO 648 , R oad vehicles — Meas ur ment te h iq es in imp c t tes ts — Ins trumentatio

ISO 1 43 , G as cylnde s — Hig pr s s ur cylnde s fr the o -b ard s tora e o n tural g s as a f el fr

a tomoti ve vehicles

ISO 1 5 1-1:—

1)

, Ro d vehicles — Compr s s ed n tural g s (CNG) f el sys tems — Part 1: S fet y r q ir ments

3 Terms and definitions

F or the purposes of this document, the t erms and def initions given in ISO 1 5 0-1, ISO 1 5 1-1 an the

folowing a ply

ISO an IEC maintain t erminolo ical data ases for use in s an ardization at the folowing ad r s es:

— IECEle tro edia: a aia le at ht p:/ www.ele tro edia.org

— ISO Onlne brow sing plat orm:a ai a le at ht p:/ www.iso.org o p

3.1

notified bo y

g ove nment a p int ed b dy man at ed t o a pro e or disa pro e

E AMP E La oratories, u iver ities an companies

1) Un er preparation

4 Test methods

4.1 Cyl nder mounting str eng th tests

4.1.1 General

When a vehicle is eq ip ed with seve al cy lin e s, they should pr fe a ly be t est ed as a unit

When groups of cy linde s ar ins aled on a vehicle such that they ar separat ely anchor d t o the

original s ructur of the vehicle, then each sep rat e groupof cy lin e s ma be t est ed in ivid aly

When pe forming these t es s, ac es ories an piping shal not contribut e t o r infor ing the cy lin e

mounting

The r q ir ment of ISO 1 5 1-1:—, 4.4.3, shal be verified b the tes spe ified in 4.1.2, 4.1.3, 4.1.4

or 4.1.5

4.1.2 Iner tia test

The cy lin e or cy lin e s t o be t est ed shal be mount ed on the vehicle b dy or a p rt of the vehicle

b dy, ac ording t o the spe if ications of the original eq ipment man factur r (OEM) or aft er-market

conve t er

The vehicle b dy or p rt of the vehicle b dy shal be f irmly anchor d t o the t es troley The method

used for anchoring the vehicle b dy t o the t es troley shal not r sult in r infor ement of the cy lin e

anchorag es or the p rt of the vehicle s ructur p rticip ting in anchoring the cy lin e or cy lin e s

Tes ing pe formed with a trol ey shal g eometricaly mat ch original vehicle con itions

The t es shal be car ied out using the folowing proc d r

a) Fi l the cy lin e or cy lin e s with a mas cor espon ing t o at leas 9 % of the mas of natural g s

ca acity at 2 MPa (2 0 b r)

2)

an 1 °C The g s density for these conditions shal be conside ed

t o be eq al t o 0,2 kg l

b) Measur the troley de ele ation with data chan els of channel fr q ency clas (C C) 6

cor esp n ing t o the charact eris ics given in ISO 648

c) Maintain the v lue of the de ele ation as def ined in ISO 1 5 1-1, for the vehicle cat eg ry, for at

leas 3 ms

4.1.3 Static test

This t es ma be car ied out on a vehicle b dy or on a part of a vehicle b dy

The cy lin e or cy lin e s t o be t est ed shal be mou t ed on the vehicle body or on part of the vehicle

b dy, ac ording t o OEM or aft er-market conve t er spe if ications

Themethod used for anchoring the vehicle b dy or the p rt of the vehicle b dy in this t es shal not

— submit the anchorag es an anchorag e ar a (3 0 mm diamet er cir le) t o a normal s r s es an / r

deformation, or

— r sult in r infor ement of the cy lin e or cy linde s or cy linde anchorag es, or the p rt of the vehicle

s ructur particip ting in anchoring the cy lin e or cy lin e s

2) 1 b r = 0,1 MPa =1

5

Pa; 1 MPa = 1N/mm

2

The traction for e is defined b F ormula (1):

F = ( M

c

w he e

F is the traction for e, in newt ons;

M

c

is the mas of empty cy lin e ( ), in kio rams;

a is the ac ele ation as def ined in ISO 1 5 1-1:—, 4.4.3;

V is the v lume of the cy lin e ( ) in ltr s;

ρ is the density of CNG at 2 MPa 0,2 kg l

The t es shal becar ied out using the folowing proc d r

a) Ap ly the traction for e t o the cy lin e or cy lin e s’ c ntr of gra ity in the spe if ied dir ctions

within 0,2 s

b) Hold the spe if ied traction for e for at leas 0,2 s

c) R elease the traction for e

4.1.4 A lter nati ve method

If a vehicle c ash t es is pe formed ac ording t o int ernational or eq iv lent r gulations, the

r q ir ment of ISO 1 5 1-1, ar conside ed t o ha e be n met

A calculation method can be used inst ead of practical t es ing if it eq iv lenc can be demons rat ed b

the a plcant for a pro al

4.1.5 Ac c eptanc e c iteria

4.1.5.1 By testing

A t the conclusion of eithe of these t es s, the cy lin e or cy lin e s shal

— r main at ached t o the vehicle body or p rt of the vehicle b dy, an

— not interfe e with the seat s ructur

4.1.5.2 By calculatio

Ap ro riat e calculations shal be car ied out, depen ing on the in ivid al t ech ical p ramet ers The

method of calculation shal be a pro ed b a authority ha ing jurisdiction

4.1.5.3 By eng ine r ing e x perienc e (ste l cylnder )

F or detais of a practical means of complanc for st eel cy lin e s ( y e 1 in ac ordanc with ISO 1 43 ),

det ermined as a r sult of calculations an subs antiat ed b ex e ienc o e time, se An ex A

4.2 Le k test

This t es ma be con uct ed at ambient t empe atur It shal be pe formed on each vehicle aft er

ins al ation

a) Fi l the vehicle fuel ing sy st em ups r am of the f irs -s ag e r gulat or with an a pro riat e g s at

1MPa (1 b r)± 0,1 MPa

b) Che k al con e tions with a g s det ect or, fo m-prod cing lq id or any othe eq iv lent method

No bub les shal bedet ect ed d ring thr e min t esor the leak rat e for each con e tion shal be les

than 2 cm

3

/h (normal)

Pe form this t es a ain with the sy st em ups r am of the firs r gulat or at 2 MPa (2 0 b r) ± 1 MPa

If the cy lin e an it v lve ha e alr ady be n leak t est ed, the leak t es shal be pe formed with the

cy lin e v lve closed

St op the t es if any leakag e oc urs d ring the fil ng from 1 MPa (1 b r) t o 2 MPa (2 0 b r) Whe e

a leak is det ect ed, it shal be r ctified b f irs r leving any pr s ur , then r sealng The sy st em shal

then be r -t est ed

4.3 Functional test

4.3.1 Main shut-of val ve test

The purp se of this t es is t o ensur that the main sh t-of v lve is in the closed position w hen

— theignition key is of,

— theengine s als,

— c anking on fuel othe than CNG, or

— theengine is not run ing on CNG

Any a pro riat e method ma be used t o ensur t es r sult

4.3.2 Rec eptacle cle ranc e test

Ensur that r e sp c aroun the r c ptacle conforms t o ISO 1 5 1-1

4.4 Rec eptacle mounting tests

This t es can be pe formed at ambient t empe atur eithe on a vehicle, or as a bench t es using a CNG

fuel sy st em eq iv lent in g eometry an anchoring t o the vehicle In eithe case, con e t the noz le t o

the r c ptacle an pr s uriz the CNG fuel sy st em t o se vic pr s ur

The g s tightnes of the CNG fuel sy st em shal not be afe t ed aft er

a) a 6 0N pul is a pled along the longitu inal a is of the r c ptacle, an

b) a moment of 2 0 N·m is a pled in a wors case manne

F olowing the a o e t es , the g s tightnes of CNG fuel ing sy st em shal be che ked with an a pro riat e

leak t es ing method

A nne x A

Eng ineering ex per ienc e for the mounting of steel cyl nders

A 1 Single cyl nder

a) The e should be at leas four p int of at achment t o the vehicle s ructur , the dis anc betwe n

w hich should be sufficient t o ensur the s a i ity of the cy lin e

b) Whe e the cy lin e is anchor d t o she t metal, the she t metal should be r infor ed at each

at achment p int with metal plat es of ar as of no les than 3 6 0 mm

2

an a thicknes of no les

than 2,5 mm Any such r infor ement plat es should be cont our d t o the sha e of the she t metal

or chas is rai It is pr fe r d that a rou d washe be used, but w he e a sq ar plat e is fitt ed the

corne s should be radiused t o at leas 0,5 mm an the b lt hole should be positioned in the c ntr of

the plat e /washe Whe e the bolt hole is not c ntral in the plat e, the near s edg e should be bent t o

form an L-se tion for s ifening

Flat ar as, even if rib ed, can be u suita le for mou tings without subs antial r infor ement,

be ause of flexing an fatigue Anchoring should be t o s ructural membe s w he ep s ible

c) The mou ting method should not signif icantly weaken the vehicles ructur

d) Whe e anchorag e b lt p s through a holow se tion, a spac r tube should be pro ided t o pr vent

cola se of that se tion u de lo d

e) Al fast ene s should ha e a diamet er of no les than that shown in Ta le A.1an should comply with

pro e ty clas 8.8 in ac ordanc with ISO 8 8-1

f) Whe e clamping b n s ar used, at leas two st eel b nds should be pro ided, the dimensions of

w hich should be no les than those shown in Ta le A.1 Howeve , in the case of multiple cy lin e s

mou t ed t og ethe , Ta le A.1 doesnot a ply

g) Whe e p rt ar joined (e.g b welding a s u t o a b n ), the s r ngth of the joint should be not les

than the s r ngth of eithe comp nent

h) Whe e the at achment is b meansof clamping b n s, the e should be a p sitive means of r sis ing

longitu inal en lo ds on the cy lin e d e t o the vehicle imp ct The friction grip of the clamping

b n s is not normaly an ac epta le means of endwise r t ention u les the clamping b n s can be

demons rat ed t o me t he r q ir ment of ISO 1 5 1-1 An ac epta le form of r t ention is t o se ur

a 2 0 mm length of 5 × 5 s ructural st eel angle t o the vehicle at each en of the cy lin e Each

length of st eel angle should be at right angles t o the longitu inal a is of the cy lin e with one leg

ve tical an f itt ed so as t o pro ide a g p of 7 mm ± 3 mm t o the en of the cy lin e The othe leg of

each angle should be se ur d t o the vehicle b at leas two 1 mm diamet er b lt Whe e suita le

body or s ructural membe s of the vehicle cons ruction ar a aia le and these component ar

ca a le of withs anding the r q ir d lo ding, they ma be used, pro ided the 7 mm ±3 mm g p is

maintained

A 2 Multiple cyl nders

F or ins alations with mor than one cy lin e , a spe if ic design ma be r q ir d for the mou ting

at achment

Table A.1 — Dimensions of at achment

Cy lin e ca acity

L

Ban dimensions

(minimum nominal size)

Bolt or s u diamet er for

b n or flang e mou tings

(minimum nominal size)

NOTE S me cou tries ac ept b n dimensions of 3 mm × 2 mm for cy lin er u t o an inclu ing 3 l

capacity

A 3 Cyl nder mounting s

Figur A.1 shows ex mples of ty ical pr fe r d ar ang ement , w hie Figur A.2 shows unac epta le

ar ang ement

Figure A.1 — Ty ical prefer ed ar ang ements