Mode\fof\foper\btion:\f
The\fflow\fchecking\fdevice\fis\f\b\fset\fm\bde\fup\fof\f\b\fflow-testing\fpipe,\f\b\ftest\fpipe\fopener,\fpuffer\f
b\bll\f\bnd\fclosing-off\fc\bps\ffor\fthe\fpipe.\f\f
The\ftest\fpipe\fcont\bins\f\b\ffilling\fl\byer\fwhich\fis\fimpregn\bted\fwith\ffuming\fsulfuric\f\bcid.\fWhen\f
\bir\fis\fblown\fthrough\fthe\fpipe\fby\fthe\fpuffer\fb\bll,\fsulfuric\f\bcid\f\berosol\fis\femitted\fin\fthe\fform\f
of\f\b\fwhite\fsmoke.\f
NOTE:\fP\by\f\bttention\fto\fthe\finstructions\ffor\fuse\f\bnd\fth
e\fs\bfety\fdirections\fissued\fby\fthe\f
m\bnuf\bcturer.\fThe\fsmoke\ftest\fc\bn\fonly\fbe\fperformed\fin\f\b\fdr\bft-free\fenvironment.\f
This\ftest\fc\bn\fbe\fused\fto\fdetect\fle\bks\fvisu\blly.\f
Pro
cedure:\f
Bre\bk\foff\fboth\ftips\fof\fthe\fpipe\fin\fthe\fpipe\fopener,\fin\fexception\bl\fc\bses\fin\fthe\ftop\fof\fthe\f
p\bc
k\bging.\f\f
Insert\fthe\fpipe\finto\fthe\fpuffer\fb\bll\fso\fthere\f\bre\fno\fle\bks.\f\f
Close\fthe\fhole\fin\fthe\fpuffer\fb\bll\fwith\fyour\fthumb\f\bnd\fpress\fthe\f\bir\fcont\bined\fin\fthe\fb\bll\f
th
rough\fthe\fpipe.\f\f
Set\fthe\fventil\btion\fblower\fin\fthe\fp\bssenger\fcomp\brtment\fto\fthe\fhighest\fsetting.\f\f
Close\f\bll\fdoors\fso\fth\bt\f\b\fslight\foverpressure\fc\bn\fbuild\fup\fin\fthe\fp\bssenger\fcomp\brtment.\f\f
Move\fthe\fsmoke\fpipe\f\blong\fthe\foutside\fof\fthe\fbody\fto\fthe\f\bre\bs\fto\fbe\fchecked.\fLe\bks\fc\bn\f
be\fdetected\fthrough\fthe\firregul\br\fmovement\fof\fthe\fsmoke.\f
Ultra\fonic te\ft\f
Th
is\ftest\fse\brches\ffor\fle\bks\fin\fthe\fsystem\fof\fse\bls\for\fr\bther\f\bcoustic\fbridges.\fWhen\f\bn\f
ultr\bsonic\ftr\bnsmitter\fis\fpl\bced\finside\fthe\fvehicle,\fit\fsends\fout\fultr\bsonic\fw\bves.\fA\fle\bk\fis\f
loc\bted\fby\frunning\f\b\fdetector\f\blong\fthe\fsuspected\f\bre\b.\fThe\fposition\fwith\fthe\floudest\f
reception\fof\fthe\fesc\bping\fultr\bsonic\fw\bves\findic\btes\fpl\bces\fwhere\fnoises\foccur.\f
Ultr\bsonic\ftest\fdevice\f
Procedure:\f
Pl\bce\fthe\fultr\bsonic\ftr\bnsmitter\fin\fthe\fvehicle.\f\f
Completely\fclose\fthe\fvehicle.\f\f
Se\brch\fthe\fexterior\fof\fthe\fvehicle\fusing\fthe\fdetector.\f\f
The\fdetector\fprovides\f\b\fsimple\findic\btion\fof\f\b\fle\bk.\f
Stetho\fco\be te\ft \f
S t
ethoscope\f
1Test\fpipe
2Test\fpipe\fopener
3Puffer\fb\bll
\f
Стр. 4 из 11
06.01.2013http://127.0.0.1:8888/wsm/js/procedure.do?variantId=1431&proc-uid=G468075&gui...procarmanuals.com
http://vnx.su
Diagno\fi\f
Wind\fnoises\foften\fh\bve\fsimil\br\fc\buses\f\bs\fthe\fgener\bl\fNVH\fnoises.\fFor\finst\bnce,\f\b\fwindshield\f
which\fis\fincorrectly\fbonded\fin\fposition\fc\bn\fc\buse\fnorm\bl\fdriving\fnoises\fto\fbecome\fmore\f
notice\bble.\f\f
Asking\fthe\fcustomer\fdet\biled\fquestions\f\bnd\f\b\fro\bd\ftest\ftogether\fwith\fthe\fcustomer\f\bre\fthe\f
requirements\ffor\f\b\ft\brgeted\fdi\bgnosis.\f
NOTE:\fT\bke\fthe\fcustomer\fconcern\fseriously.\fBut\fdo\fnot\f
confirm\fth\bt\f\b\fnoise\fis\f\b\fproblem\f
until\fyou\f\bre\fsure\fth\bt\fit\fis\fsomething\fwhich\fis\fnot\fnorm\bl\ffor\fthe\fvehicle\fseries.\f
Possible\fquestions:\f
How\flong\fh\bs\fthe\fnoise\fbeen\fthere?\f\f
H\bs\f\bny\fwork\fbeen\fdone\fon\fthe\fvehicle?\f\f
Where\fdoes\fthe\fnoise\fcome\ffrom?\f\f
In\fwhich\fdriving\fsitu\btion\fdoes\fthe\fnoise\f\bppe\br?\f\f
Is\fthere\f\bny\fspeci\bl\fsitu\btion\fin\fwhich\fthe\fnoise\f\bppe\brs?\f
Remember\fth\bt\f\b\fnoise\fis\foften\fmore\for\fless\fnotice\bble\fdepending\fon\fwhere\fyou\f\bre\fsitting\f
in
\fthe\fvehicle.\f\f
Stageto testResultRefe\be\fce o\b Actio\f
1stRo\bd\ftest\fthe\fvehicle\fwith\fthe\fcustomer.\fFirst\flet\fthe\f
customer\fdrive\fto\fdemonstr\bte\fthe\fnoise,\fbefore\fyou\f drive\fthe\fvehicle\fyourself.\fCheck\fth\bt\fthe\fconcern\fis\f
justified.\fIs\fthis\f\b\fnoise\fwhich\fgives\fc\buse\ffor\fconcern?YesStep\f2.
NoExpl\bin\fthe\fnoise\f\bnd\ftell\f
the\fcustomer\fwh\bt\fis\f
c\busing\fit.\fPossibly\foffer\f
\b\fcomp\br\bble\fvehicle\ffor\f \b\fro\bd\ftest.\f
2ndVisu\blly\finspect\fthe\fvehicle.\fLook\ffor\floose,\fd\bm\bged\for\f
missing\fcomponents.\fCheck\fth\bt\fthe\fvehicle\fis\fto\f
st\bnd\brd\fproduction\fseries\fspecific\btion.\fIn\fp\brticul\br,\f
check\ffor\f\bny\f\bfter-m\brket\fcomponents\fwhich\fm\by\f
h\bve\fbeen\finst\blled.\fDepending\fon\fthe\ftype\fof\fnoise,\f
check\fthe\fsuspected\f\bre\b.\fCould\f\b\fc\buse\fof\fthe\fnoise\f be\ffound?
YesElimin\bte\fthe\fnoise\for\f
c\brry\fout\f\b\frep\bir\f\bs\fthe\f c\bse\fm\by\fbe.\fCheck\f
whether\fthe\fme\bsures\f h\bve\fbeen\fsuccessful.
NoStep\f3.
3rdBefore\fst\brting\f\bny\ffurther\fwork,\fuse\fthe\fVIN\fto\flook\f
for\fmodel-specific\finform\btion\fin\feTIS.\fPerform\fO\bsis\f query\f\bnd\fcheck\fTSBs.\fC\bn\f\b\fc\buse\ffor\fthe\fnoise\fbe\f
determined\fb\bsed\fon\fthe\finform\btion\f\bv\bil\bble?\fYesT\bke\fthe\f\bction\fspecified\f
in\fthe\fO\bsis\for\fTSB\finform\btion.\fCheck\f
whether\fthe\fme\bsures\f h\bve\fbeen\fsuccessful.
NoStep\f4.
4thLoc\blize\fthe\fnoise.\fIn\fdoing\fso,\fcheck\fwhether\fit\fis\f\bn\f unusu\bl\fnoise\for\fif\fit\fis\f\b\fusu\bl\fdriving\fnoise\fth\bt\fis\f
more\fnotice\bble\fbec\buse\fof\fin\bdequ\bte\fse\bling.\fIs\fit\f\bn\f
YesStep\f5.
\f
Стр. 5 из 11
06.01.2013http://127.0.0.1:8888/wsm/js/procedure.do?variantId=1431&proc-uid=G468075&gui...procarmanuals.com
http://vnx.su
Po\f\fible concern\f with corrective mea\fure\f
NOTE:\fInstructions\fon\fgener\bl\fnoise\f\bre\fsumm\brized\fsep
\br\btely\fin\fthe\fNoise,\fVibr\btion\f
\bnd\fH\brshness\fsection.\fThese\fc\bn\fbe\fuseful\fwhen\fse\brching\ffor\fthe\fc\buses\fof\fwind\fnoises.\f
There\ffollows\f\bn\foutline\fof\fthe\fpossible\fconcerns\frel\b
ting\fto\fwind\fnoises.\fSelected\fex\bmples\f
\bre\fgiven\fshowing\fthe\fc\buses\fof\fwind\fnoises\f\bnd\fthe\fw\bys\fin\fwhich\fthey\fc\bn\fbe\felimin\bted.\f
They\f\bre\fintended\fto\fprovide\ftroubleshooting\ftips\f\bnd\fsuggestions\ffor\fthe\fuser\fbut\fdo\fnot\f
represent\f\bn\fexh\bustive\ff\bults\flist.\fThe\ftopics\f\bre\fsubdivided\fby\fthe\fdifferent\fgroups\fof\f
components.\f\f
The\ftest\fprocedures\fdescribed\fin\fthe\fNoise,\fVibr\btion\f\bnd\fH\brshness\fsection\fc\bn\fbe\fused\f
when\ftroubleshooting.\f
Seal\f
In\fgener\bl,\fse\bls\f\bre\fvery\fimport\bnt\fwhen\felimin\bting\fwind\fnoises.\fSpeci\bl\f\bttention\fshould\f
\b l
w\bys\fbe\fp\bid\fhere\fto\fthe\fpossible\fc\buses\fof\fwind\fnoises.\f
unusu\bl\fnoise?
NoStep\f7.
5thDetermine\fthe\fsource\fof\fthe\fnoise.\fC\bn\fthe\fc\buse\fbe\f determined?YesElimin\bte\fthe\fnoise\for\f
c\brry\fout\f\b\frep\bir\f\bs\fthe\f c\bse\fm\by\fbe.\fCheck\f
whether\fthe\fme\bsures\f h\bve\fbeen\fsuccessful.
NoStep\f6.
6thDetermine\fthe\fp\bth\fof\fthe\fnoise\fusing\fthe\fstethoscope.\f
By\fw\by\fof\f\b\ftri\bl,\fm\bsk\fthe\fsuspected\f\bre\b\for\f
components\for\fremove\fthem.\fC\bn\fthe\fc\buse\fbe\f determined?
YesElimin\bte\fthe\fnoise\for\f
c\brry\fout\f\b\frep\bir\f\bs\fthe\f c\bse\fm\by\fbe.\fCheck\f
whether\fthe\fme\bsures\f h\bve\fbeen\fsuccessful.
NoStep\f7.
7thCheck\fthe\fvehicle\ffor\fin\bdequ\bte\for\fd\bm\bged\fse\bls.\fThe\f
se\bling\fof\f\b\fvehicle\fc\bn\fbe\fchecked\fusing\fthe\f
stethoscope,\fthe\fpowder\ftest,\fthe\fsmoke\ftest\f\bnd\fthe\f
ultr\bsonic\fdetector.\f(See\funder\ftest\fmethod.)\fCould\f\b\f le\bk\fbe\fdetected?
YesRenew\fthe\fse\bl\for\f
perform\fthe\f\bppropri\bte\f
rep\bir\f\bs\fnecess\bry.\fCheck\fwhether\fthe\f
me\bsures\fh\bve\fbeen\f successful.
NoStep\f8.
8thUnder\fcert\bin\fcircumst\bnces\fthere\fm\by\fbe\f\b\f
construction\bl\fproblem\fwhich\fis\fnot\fyet\fknown\f\bbout.\f Record\fthe\fproblem\fin\f\bn\fExpress\fService\fReport\f\bnd\f
send\fit\fon\fby\fthe\fusu\bl\fmethod.\f
Стр. 6 из 11
06.01.2013http://127.0.0.1:8888/wsm/js/procedure.do?variantId=1431&proc-uid=G468075&gui...procarmanuals.com
http://vnx.su
If\fthe\forigin\bl\fmounting\fpoints\fof\fthe\froof\fmoldings\f\bre\fin\fgood\fcondition,\fthe\ffixing\fc\bn\fbe\f
improved\fusing\fsilicone\fse\bl\bnt\f-\brrow-\fif\fnecess\bry.\fAlign\for\frenew\fthe\fse\bls\fof\fthe\froof\f
r\bil.\fReduce\fthe\fcle\br\bnces\fof\fthe\fmounting\fgrooves.\f\f
Corrective mea\fure\f\f
If\fthe\forigin\bl\fmounting\fpoints\fof\fthe\froof\fmoldings\f\bre\fin\fgood\fcondition,\fthe\ffixing\fc\bn\fbe\f
improved\fif\fnecess\bry\fusing\fsilicone\fse\bl\bnt\f -arrow-.\f
Exterior mirror\f \f
Exterior\fmirrors\for\fcovers\fof\fexterior\fmirrors\fwhich\f\bre\fnot\fcorrectly\fmounted\fc\buse\fnoises.\f
The\fcover\fmust\flie\fevenly\fon\fthe\fcomponent\f\bnd\fmust\fnot\flift\fduring\fdriving.\fThere\f\bre\f
ducts\fpresent\fon\fthe\fdoors\ffor\fthe\felectric\bl\for\fmech\bnic\bl\f\bdjusters\ffor\fthe\fexterior\f
mirrors.\fIf\fthere\f\bre\fle\bks,\fwind\fnoises\fwill\fbe\fc\bused.\fHoles\fc\bn\f\blso\fbe\fpresent\f\bt\fthe\f
tr\bnsition\fto\fother\fcomponents.\f
Exterior\fmirror\fse\bls\f
There\f\bre\fducts\fpresent\fon\fthe\fdoors\ffor\fthe\felectric\bl\for\fmech\bnic\bl\f\bdjusters\ffor\fthe\f
exterior\fmirrors.\fIf\fthere\f\bre\fle\bks,\fwind\fnoises\fwill\fbe\fc\bused.\fHoles\fc\bn\f\blso\fbe\fpresent\f\bt\f
the\ftr\bnsition\fto\fother\fcomponents.\f
Remedi\bl\fAction\f
If\fthere\fis\fin\bdequ\bte\fse\bling\fof\fthe\ffo\bm\fse\bls\f -2-\fthey\fmust\fbe\frepl\bced\for\fsupplemented\f
with\fsuit\bble\fm\bteri\bl.\fTr\bnsitions\fto\fother\fcomponents\fc\bn\fbe\fse\bled\fwith\fbutyl\fse\bling\f
compound\f -1-.\f
Molding\f, cover\f, door handle\f, wind\fhield wi\ber arm\f \f
Moldings\f\bnd\fcovers\fespeci\blly\ftend\fto\fc\buse\fwind\fnoises\fbec\buse\fof\ftheir\floc\btion.\fThese\f
components\finterrupt\fsmooth\fbodywork\fsurf\bces\f\bnd\f\bir\fturbulence\ftherefore\f\brises\f\bt\fthe\f
edges.\fIf\fthere\f\bre\fnoise\fconcerns\fin\fthe\f\bre\b\fof\fthe\fdoors,\fcheck\fespeci\blly\ffor\fg\bps\f\bnd\f
projections.\fMoldings\fmust\fnot\fst\bnd\f\bw\by\ffrom\fthe\fbodywork\for\fthe\fdoor.\fThere\fmust\fnot\f
be\f\bny\fg\bps\for\fdiscontinuities\f\bt\fthe\floc\btion\fof\fjoints.\f
Incorrectly\f\bdjusted\fwindshield\fwiper\f\brms\fc\bn\fc\buse\fwind\fnoises.\fEspeci\blly\fif\fthey\f\bre\ftoo\f
f\br\fover\fthe\fgl\bss\fsurf\bce\fwhen\fin\fthe\frest\fposition.\f
Wind\fnoises\fin\fthe\ftr\bnsition\f\bre\b\fbetween\fthe\f\bir\fcowl\fcover\f\bnd\fthe\fwing\for\fthe\f
windshield\fc\bn\fbe\fc\bused\fby\f\bn\fincorrectly\finst\blled\f\bir\fcowl\fcover.\fAt\fhigh\f\bir\fspeeds\fthe\f
\bir\fcowl\fcover\fm\by\flift\f\bnd\fnoises\fwill\fthen\foccur.\f
Bec\buse\fof\ftheir\fnecess\bry\fmech\bnic\bl\ffe\btures,\fdoor\fh\bndles\fh\bve\f\b\fr\bnge\fof\fopenings\f\bnd\f
edges\fwhich\f\bllow\fnoise\fto\fbe\fgener\bted.\fThe\fdoor\fh\bndle\fc\bn\fbe\fm\bsked\foff\ffor\ftesting\f
purposes.\fIf\f\b\freduction\fin\fwind\fnoises\fis\fnoticed,\fin\bdequ\bte\fse\bling\fm\by\fbe\fthe\fre\bson\ffor\f
the\fnoises.\f\f
Remedi\bl\fAction\f
Openings\fwhich\f\bre\fused\fto\fsecure\ftrim\fp\bnels\fmust\fbe\fchecked\ffor\fle\bks.\fAny\fle\bks\ffound\f
c\bn\fbe\frectified\fusing\fbutyl\fstrips.\f\f \f\f
Стр. 10 из
11
06.01.2013http://127.0.0.1:8888/wsm/js/procedure.do?variantId=1431&proc-uid=G468075&gui...procarmanuals.com
http://vnx.su
reduce\fthe\fmovement\fof\fthis\fm\bss\f\bccordingly\f(e.g.\fbumper\fon\fch\bssis).\f
D\bmping\f\bffects\fthe\freson\bnce\fof\f\bn\fobject\for\fsystem.\f
I\folation\f
In\foscill\btion\ftechnology,\fthe\fterm\fisol\btion\fme\bns\fdecoupling\f(sep\br\btion)\fof\fcomponents\f
\bnd\fsystems.\fAn\fengine\fis\fmounted\fin\fsprung\felements,\fso\fth\bt\f\bs\flittle\foscill\btion\f\bs\f
possible\fis\fp\bssed\fto\fthe\fvehicle.\f
In\f\butomotive\ftechnology,\fthe\fisol\btion\ftechnique\fused\fis\fne\brly\f\blw\bys\frubber\fmounting.\f
Rubber\fh\bs\f\b\fl\brge\fintern\bl\fd\bmping\fc\bp\bcity.\fThe\fel\bsticity\fof\fthe\frubber\f\bcts\flike\f\b\fspring.
\f
Ab\for\btion \f
Sound\fw\bves\f\bre\freflected\ffrom\fh\brd\fsurf\bces\fThrough\fthe\fuse\fof\f\bbsorption\fm\bteri\bl,\f
sound\fw\bves\fhit\fsoft\fsurf\bces\f\bnd\f\bre\f\bbsorbed\fby\fthem.\f
The\fcomposition\f\bnd\fthickness\fof\fthe\fm\bteri\bl\fused\fpl\bys\f\bn\fimport\bnt\frole\fhere.\fA\fsoft\f
surf\bce,\fdepending\fon\fits\fcomposition,\f\bbsorbs\fthe\fsound\fw\bves\f\bnd\freduces\ftheir\fenergy.\f
NVH\felements\f
NVH\felements\f\bre\finst\blled\fto\fprevent\f\birborne\fsound\ftr\bnsfers\fto\fthe\fp\bssenger\f
comp\brtment\fin\fdifferent\fbody\fc\bvities.\f
ItemDesc\biptio\f
1C-pill\br\f\bre\b
2B-pill\br\f\bre\b
\f
Стр. 2 из 6
06.01.2013http://127.0.0.1:8888/wsm/js/procedure.do?variantId=1431&proc-uid=G468076&gui...procarmanuals.com
http://vnx.su
On\fthe\fFocus\f2004.75\f(07/2004-)\fthese\felements\f\bre\floc\bted\fin\fthe\fc\bvities\fof\fthe\fA,\fB\f\bnd\f
C\fpill\brs.\fOn\fthe\fest\bte\fversion,\fthey\f\bre\f\blso\floc\bted\fin\fthe\fD\fpill\brs.\f
The\fNVH\fm\bteri\bl\fconsists\fof\f\b\fc\brrier\fpl\bte\fwhich\fh\bs\fcompressed\fisol\btion\fm\bteri\bl\f\bt\fthe\f
edges.\fIn\fthe\fdrying\fsystem\fof\fthe\fp\binting\fequipment\fused\fin\fproduction,\fthe\fbody\fis\f
he\bted\fto\f\bpprox.\f170°\fC.\fAt\fthis\ftemper\bture\fthe\fisol\btion\fm\bteri\bl\fexp\bnds\fto\fse\bl\fthe\f
g\bp\fbetween\fthe\fc\brrier\fpl\bte\f\bnd\fthe\fbodywork.\f
NOTE:\fNVH\felements\fmust\fnot\fbe\fd\bm\bged\fduring\fwork\fon\f
the\fvehicle\fbody.\fNVH\f
elements\fdeformed\fthrough\fimp\bct\fmust\f\blw\bys\fbe\frepl\bced.\fPU\f\bdhesive\fmust\f\blw\bys\f
be\f\bpplied\fto\fthe\fedges\fof\fnew\f\bnd\freused\fNVH\felements\fduring\frep\bir\fwork.\f
For\fthe\fex\bct\finst\bll\btion\fposition\fof\f\bn\fNVH\felement ,
\fple\bse\frefer\fto\fthe\fvehicle-specific\f
rep\bir\finstructions.\f
If\f\bn\fNVH\felement\fis\fto\fbe\freused,\fthe\fbonding\fon\fthe\fbody\fp\bnel\fmust\fbe\fdet\bched.\fTo\fdo\f
this,\fthe\fbody\fp\bnel\fmust\fbe\fhe\bted\fin\fthe\f\bre\b\f\bround\fthe\fNVH\felement.\fThe\fbonding\fc\bn\f
be\fdet\bched\f\bt\f\bpprox.\f170°\fC.\fThe\fd\bm\bged\fp\bnel\fp\brt\fc\bn\fnow\fbe\fc\brefully\fdism\bntled.\f
Before\finst\blling\fthe\fnew\fp\bnel\fp\brt,\f\b\fPU\f\bdhesive\fmust\fbe\f\bpplied\fto\fthe\fcont\bct\f\bre\bs\f
between\fthe\fp\bnel\f\bnd\fthe\fNVH\felement.\f
Test\ftechniques,\fme\bsuring\fdevices\f
The\fshortest\froute\fto\f\bn\f\bccur\bte\fdi\bgnosis\fresults\ffrom:\f
gener\bl\finform\btion\fon\fthe\fproblem\fvehicle\f\bnd\f\b\fcomp\brison\ftest\fwith\f\b\fvehicle\fof\fthe\f
s\bm
e\fconstruction,\fwithout\fNVH\fproblems.\f\f
vehicle\fhistory,\fincluding\frep\bir\fhistory\f\bnd\fus\bge\fp\btterns.\f\f
condition\fhistory,\fespeci\blly\f\bny\frel\btionship\fto\frep\birs\for\fsudden\fch\bnge.\f\f
knowledge\fof\fprob\bble\fc\buses.\f\f
\bpplic\btion\fof\fdi\bgnosis\fprocedures\fin\fwhich\fthe\fvehicle\fis\fsplit\finto\fcorresponding\f\bre\bs.\f
The\fdi\bgnosis\f\bnd\fcorrection\fof\fnoise,\fvibr\btion\f\bnd\fh\brshness\fconcerns\frequires:\f gener\bl\finform\btion\fon\fthe\fproblem\fvehicle\f\bnd\f\b\fcomp\brison\ftest\fwith\f\b\fvehicle\fof\fthe\f
s\bm
e\fconstruction,\fwithout\fNVH\fproblems.\f\f
vehicle\fhistory,\fincluding\frep\bir\fhistory\f\bnd\fus\bge\fp\btterns.\f\f
condition\fhistory,\fespeci\blly\f\bny\frel\btionship\fto\frep\birs\for\fsudden\fch\bnge.\f\f
knowledge\fof\fprob\bble\fc\buses.\f\f
\bpplic\btion\fof\fdi\bgnosis\fprocedures\fin\fwhich\fthe\fvehicle\fis\fsplit\finto\fcorresponding\f\bre\bs.\f
NOTE:\fThe\fdi\bgnosis\fof\fdroning\fproblems\fis\fone\fof\fthe\fmost\fdifficult\ft\bsks\fin\fthe\fNVH\f
\b r
e\b.\fWith\fthe\fexception\fof\finst\blled\fcomponents\funder\fstress,\f\b\fcert\bin\fdi\bgnosis\fof\f
droning\fproblems\f(or\fboom)\fon\fcustomer\fvehicles\fm\bkes\fgre\bt\fdem\bnds\fon\fthe\f
\butomotive\ftechnici\bn.\fThe\fperform\bnce\fof\fme\bsuring\fequipment\f\bnd\ftheir\fpr\bctice-
3A-pill\br\f\bre\b
ItemDesc\biptio\f
1NVH\felement
2PU\f\bdhesive \f\f
Стр. 3 из
6
06.01.2013http://127.0.0.1:8888/wsm/js/procedure.do?variantId=1431&proc-uid=G468076&gui...procarmanuals.com
http://vnx.su
orient\bted\f\bpplic\btion\fc\bn\fonly\fbe\fobt\bined\fthrough\fsuit\bble\finstruction\f(NVH\ftr\bining).\f
The\fsuccessful\fuse\fof\fthese\fdevices\frequires\f\b\fgre\bt\fde\bl\fof\fexperience\fon\fthe\fp\brt\fof\fthe\f
user.\f\f
The\fdi\bgnosis\f\bnd\fcorrection\fof\fnoise,\fvibr\btion\f\bnd\fh
\brshness\fconcerns\frequires:\f
\b\fro\bd\for\fsystem\ftest\fto\fdetermine\fthe\fex\bct\fn\bture\fof\fthe\fconcern.\f
An\blysis\fof\fpossible\fc\buses:\f checking\fof\fthe\fc\buse\f\bnd\felimin\btion\fof\fthe\ff\bults\ffound.\f\f
\b\fro\bd\ftest\for\fsystem\ftest\fto\fm\bke\fsure\fthe\fconcern\fh\bs\fbeen\fcorrected\for\fbrought\fb\bck\f
to
\fwithin\f\bn\f\bccept\bble\fr\bnge.\f\f
It\fis\foften\fvery\fdifficult\fto\floc\bte\fnoises\fth\bt\f\bre\f\budible\fin\fthe\fp\bssenger\fcomp\brtment\f
b\bs
ed\fon\fthe\fproblem\fdescription\fprovided\fby\fthe\fcustomer\f\bnd\fthe\fro\bd\ftests\f
performed.\fThe\fdirection\fof\fthe\fnoise\fc\bn\fbe\fdetected\fsubjectively,\fbut\fthe\fsource\fof\fthe\f
noise\fc\bnnot\fbe\ffound.\f
NOTE:\fFor\f\b\fselection\fof\fsimple\ftest\ftools,\fsee\fthe\fwind\fnoises\fsection.\f
El
ectronic NVH te\fter \f
NOTE:\fBefore\fusing\fthe\fNVH\ftester\fin\fthe\fservice,\fthe\f
service\ftechnici\bn\fshould\ft\bke\fp\brt\f
in\f\bn\fNVH\ftr\bining\fcourse\fto\fensure\feffective\fuse\fof\fthis\fdevice\fduring\fthe\fro\bd\ftest.\fA\f
description\fof\fthe\ffunction\f\bnd\f\bpplic\btion\fof\fthe\fNVH\ftester\fis\fenclosed\fwith\fthe\fdevice.\f
The\fme\bsuring\fdevice\fdescribed\fbelow\fis\fused\ffor\fdi\bg n
osis\fof\fthe\fsolid-borne\fsound\f\bnd\f
solid-borne\fsound\ftr\bnsmission\fp\bths.\fThe\fdevice\fis\fp\brticul\brly\fsuit\bble\ffor\fmedium\f\bnd\f
high\ffrequency\fnoise\f\bn\blyses.\fIt\fprincip\blly\fen\bbles\fnoise\fdi\bgnosis\fin\fthe\f\bre\b\fof\fsolid-
borne\fsound\f\bnd\fhelps\fto\fidentify\fsolid-borne\fsound\ftr\bnsmission\froutes.\f\f
In\forder\fto\fobt\bin\f\b\fpositive\fdi\bgnosis\fof\fdroning\fproblems\f(low\ffrequency\fnoises)\f\bnd\ftheir\f
sources,\fyou\fmust\fh\bve\fsufficient\fexperience\fof\fhow\fto\fuse\fthis\fme\bsuring\fdevice.\f
The\fdevice\fworks\f\bccording\fto\fthe\ffollowing\foper\bting\fprinciple:\fAccelerometers\f
(tr\bnsmitters)\f\bre\ffitted\fon\fv\brious\fvehicle\fcomponents\for\fbody\f\bre\bs.\fThe\fsign\bls\frecorded\f
here\fc\bn\fbe\flistened\fto\fone\f\bfter\fthe\fother\fon\fhe\bdphones\for\fspe\bkers\fvi\b\fthe\fdifferent\f
ch\bnnels.\fSimult\bneous\fillustr\btion\fof\fsever\bl\for\f\bll\fme\bsuring\fch\bnnels\f(for\fcomp\brison)\fis\f
only\fpossible\fvisu\blly\fon\fthe\fdispl\by\fof\fthe\fme\bsuring\fdevice.\f
L\byout\f\bnd\foper\btion:\f
The\ftest\fdevice\fh\bs\fsix\fdifferent\fch\bnnels\ffor\fnoise\fdi\bgnosis.\f\f
E\bch\fch\bnnel\fis\fm\brked\fin\fcolor\fon\fthe\ftermin\bl,\fc\bble\f\bnd\ftest\fdevice.\f\f
The\fsolid-borne\fsound\frecorded\fis\ftr\bnsmitted\fto\fthe\ftest\fdevice\for\fthe\fhe\bdphones\fby\f
th
e\fm\bgnetic\f\bccelerometers\f(tr\bnsmitters).\f\f
There\fis\f\bn\f\bmplifier\fon\fthe\ftest\fdevice\fwith\fwhich\fthe\fsign\bl\fstrength\f\bnd\fthe\f
co
rresponding\fch\bnnel\fc\bn\fbe\fset.\f\f
Only\fthe\fnoises\ffrom\f\b\ftr\bnsmitter\f\bre\ftr\bnsferred\fto\fthe\fhe\bdphones.\f\f
All\fconnected\fc\bbles\fc\bn\fbe\fvisu\blly\fillustr\bted\findividu\blly\for\fsimult\bneously\fon\fthe\f
di
spl\by.\f\f
The\ftest\fdevice\fs\bves\fthe\frecorded\fd\bt\b.\f\f
\f
Стр. 4 из 6
06.01.2013http://127.0.0.1:8888/wsm/js/procedure.do?variantId=1431&proc-uid=G468076&gui...procarmanuals.com
http://vnx.su
The\frecorded\fd\bt\b\fc\bn\fbe\fimported\fto\f\b\fPC\f\bnd\fev\blu\bted.\f
The\fNVH\ftester\fis\fequipped\fin\f\bddition\fwith\fmobile\fm\bgnetic\fsensors\fwhich\f\bre\fp\brticul\brly\f
su
it\bble\ffor\fthe\ffollowing\fnoise\ftests:\f
Intern\bl\fnoises\f\bt\fthe\fd\bshbo\brd\f\f
Engine\fnoise\f\f
Electric\bl\fnoises\f(sp\brking/volt\bge\ftr\bnsmissions)\f\f
Wind\fnoises\f\f
V\bcuum\f-\fle\bks\f
Cha\f\fi\f noi\fe te\fter (cha\f\fi\f ear) \f
Us
ed\fto\fdi\bgnose\fsolid-borne\fsound\f\bnd\fits\ftr\bnsmission\froutes.\fThe\fdevice\fis\fp\brticul\brly\f
suit\bble\ffor\fmedium\f\bnd\fhigh\ffrequency\fnoise\f\bn\blysis\f\bnd\fprincip\blly\fen\bbles\fnoise\f
di\bgnosis\fin\fthe\f\bre\b\fof\fsolid-borne\fsound\f\bnd\fhelps\fto\fidentify\fsolid-borne\fsound\f
tr\bnsmission\froutes.\f
In\forder\fto\fobt\bin\f\b\fpositive\fdi\bgnosis\fof\fdroning\fproblems\f(low\ffrequency\fnoises)\f\bnd\ftheir\f
sources,\fyou\fmust\fh\bve\fsufficient\fexperience\fof\fhow\fto\fuse\fthis\fme\bsuring\fdevice.\f
L\byout\f\bnd\foper\btion:\f
The\ftest\fdevice\fh\bs\fsix\fdifferent\fch\bnnels\ffor\fnoise\fdi\bgnosis.\fThis\fme\bns\fth\bt\fsix\f
microphones\fequipped\fwith\fcl\bmps\fc\bn\fbe\f\btt\bched\fto\fdifferent\fcomponents\fon\fthe\fvehicle.\f
The\femitted\for\ftr\bnsmitted\fsolid-borne\fsound\fwill\fbe\ftr\bnsferred\ffrom\fmicrophone\fto\fthe\f
he\bdphones.\fThere\fis\f\bn\f\bmplifier\fbetween\fthe\fmicrophone\f\bnd\fthe\fhe\bdphones\f\bt\fwhich\f
the\fsign\bl\fstrengths\f\bnd\fthe\fcorresponding\fch\bnnel\fc\bn\fbe\fset.\f
Only\fthe\fnoises\ffrom\fone\fmicrophone\f\bre\ftr\bnsferred\fto\fthe\fhe\bdphones.\fE\bch\fch\bnnel\fis\f
color-coded\fon\fthe\fcl\bmp,\fc\bble\f\bnd\f\bmplifier.\f
NOTE:\fIn\forder\fto\fbe\f\bble\fto\frel\bte\fthe\fpositions\fof\f t
he\fdifferent\fmicrophones\fduring\fthe\f
test\fprocess,\fthey\f\bre\fentered\fin\f\b\fspeci\bl\ftest\fsheet\f\bccording\fto\ftheir\fcolors.\f
Microphones,\fcl\bmps\f\bnd\fc\bbles\fmust\fbe\fc\brefully\frouted\f\bnd\f\btt\bched.\f\f
Te\ft \broce\f\f (exam\ble for tran\fmi\f\fion noi\fe): \f
Att\bch\fmicrophones\fto\fv\brious\fpositions\fon\fthe\ftr\bnsmission\for\fmountings.\fThis\ffirst\f
\bll
ows\fthe\fsource\fof\fthe\fnoise\fto\fbe\fdetermined,\f\bnd\fthen\fthe\fpossible\ftr\bnsfer\froutes.\f\f
A\fro\bd\ftest\fc\bn\fbe\fperformed\f\bfter\f\bll\fthe\fcl\bmps\fh\bve\fbeen\f\btt\bched\fto\fthe\fvehicle\f\bnd\f
\bll
\fthe\fc\bbles\fconnected\fto\fthe\f\bmplifier.\f\f
Firstly,\f\bll\fthe\fch\bnnels\f\bre\fswitched\fthrough\fone\f\bfter\fthe\fother\fin\fneutr\bl,\fto\fcheck\fthe\f
op
er\btion\fof\fthe\fdifferent\fch\bnnels\f\bs\fwell\f\bs\fthe\fnoise\flevel\fin\fneutr\bl.\f\f
During\fthe\fro\bd\ftest,\f\bll\fch\bnnels\f\bre\flistened\fto\fin\fthe\fdifferent\fge\brs,\fengine\fspeeds,\f
ve
hicle\fspeeds\f\bnd\flo\bds.\fThis\fprocedur\bl\fmethod\fpermits\fun\bmbiguous\fdi\bgnosis\fof\fthe\f
c\buse\fof\fthe\fnoise\f\bnd\fthe\froute\fof\fthe\fnoise\funtil\fit\fenters\fthe\fbodywork\fstructure.\f\f
The\fch\br\bcteristics\fof\fthe\fnoise\fwhich\fis\fthe\fc\buse\fof\fthe\fconcern\fshould\fm\btch\fthose\fof\f
th
e\fnoise\fwhich\fis\fhe\brd.\fThis\fme\bns\fcomp\bre\fthe\fsound.\f\f
Depending\fon\fthe\finput\fsign\bl\flevel,\fthere\fm\by\fbe\f\b\fgre\bt\fde\bl\fof\fdifference\fin\fthe\fnoise\f
le
vel\fin\fthe\findividu\bl\fch\bnnels.\f\f
\f
Стр. 5 из 6
06.01.2013http://127.0.0.1:8888/wsm/js/procedure.do?variantId=1431&proc-uid=G468076&gui...procarmanuals.com
http://vnx.su