ETRTO Informal document GRB 62 17 62nd GRB 13 September 2015 agenda item 7 Key Comments The subset of C1 amp C2 tyres used in the studies presented by The Netherlands ID: 808172
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Slide1
Transmitted by the expert from ETRTO
Informal document
GRB-
62
-17
(62nd GRB, 1-3 September 2015,
agenda item
7)
Slide2Key CommentsThe subset of C1 & C2 tyres used in the studies presented by The Netherlands does not represent the European tyre market and is biased towards low noiseThe database used in the studies presented by The Netherlands do not identify which tyres are traction marked.The definition of C3 traction tyres used in the studies presented by The Netherlands is not according to UN Reg. 117.02
ETRTO
cannot
enter
into
details
on the
tyre
market
pricing
Any assessment
in terms of future potential for improvement
can only be done as long as all
tyres
complying to all UN Reg. 117.02 requirements
are on the market.
Slide3Evaluation of tyre noise limits based on sold tyres in The Netherlands – C1 & C2 tyres ETRTO considered the database from which NL extracted a subset for their studies and, in our view,:The VACO database
is representative for the tyres on sale in
Europe
The subset of C1 & C2 tyres derived from
the
extraction of the 2013’s VACO database is biased towards low noise and is not representative for the current VACO database.
VACO C1
database
(19569 labels)
database of C1
tyres
on sale in Europe
(30820 labels)
4 % of VACO database
C1 subset
of VACO database used in M+P & TNO study(760 labels)
Example for C1:
Slide4Evaluation of tyre noise limits based on sold tyres in The Netherlands – C3 tyresETRTO considered the database from which NL extracted a subset in their studies and, in our view,:
The
subset of
C3
tyres
in the M+P and TNO study seems to have a similar distribution compared to the distribution of the C3 VACO databaseTraction tyresIn the VACO database the “Traction” marked tyres according to UN Reg. 117.02 cannot be identified.
However, the
assumption in the M+P & TNO study that C3 traction tyres
are all tyres fitted on the drive axle is incorrect.
Consequently, the 2 dB(A) allowance is assumed for a too high number of C3 tyres.
Slide5Cost-Benefit Analyses of the use of better tyresRef
. GRB-61-03:
Figure 3. Aspects of the
tyre
label versus the advice sale prices of car
tyres in the Netherlands. Internet sales the Netherlands, 472 tyres size 205/55R16, http://www.autobandenmarkt.nl/index.html. ETRTO comment:The link between the 4 graphs is not considered and thus the conclusions are not valid
Slide6New Tyre Types
Existing Tyre Types
RR Stage1
Noise
RR Stage2
Wet Grip
RR Stage1
Noise
RR Stage2
Wet Grip
Wet Grip
RR Stage1
Noise
RR Stage2
RR Stage1
Noise
RR Stage2
Wet Grip
C1
C2
C3
New Vehicle
Models
Wet Grip
RR Stage1
Noise
RR Stage1
Noise
RR Stage1
Noise
RR Stage2
Wet Grip
RR Stage2
Wet Grip
RR Stage2
RR Stage2
RR Stage1
Noise
RR Stage2
Wet Grip
Wet Grip
RR Stage1
New Tyre Types
New Tyre Types
Noise
1
st
/Nov
2012
1
st
/Nov
2014
1
st
/Nov
2
016
1
st
/Nov 2
018
1
st
/Nov
2020
1
st
/Nov
2013
1
st/Nov 2017
New VehicleTypes
New VehicleModels
Existing Tyre Types
Existing Tyre Types
UN Regulation 117 IMPLEMENTATION STEPS
A realistic State of Art and its assessment in terms of future potential for improvement can only be done when all the
tyres
complying to all UN Reg. 117.02 requirements are on the market.
Slide7Thank you!
European Tyre and Rim Technical Organisation