Movement on Noise Regulation – Alignment with R 51.03Movement on Noise Regulation – Alignment with R 51.03

9th SIAM /JAMA MEETING30th October 2014, Goa, India

Pass-By Noise Regulations for M and N category vehicles Current Method “A” of Measurement of Pass By Noise [IS 3028: 1998]

The maximum sound pressure levels in dB(A) shall be measured between AA’ &

BB’

Position of the microphone at

a distance of 7.5m from the reference line CC’ & ht of 1.2m

The approach speed shall be lower of the following

two speeds : 50kmph or ¾ th of the Engine Max Speed

New Method “B” of Measurement of Pass By Noise [R 51.03]

The New Method B is developed under the umbrella of UNECE & based on ISO 362 : 2007

Method B is designed in such a way that - it represents normal urban driving conditions. - it addresses the most important noise sources of a vehicle during urban driving,

Pass-By Noise Regulations for M and N category vehicles

M1, N1 , M2< 3.5T Pre-acceleration allowed

Test Mass = 50 kg / kw for Trucks

No allowance for Instrument error No allowance for DI engine - Car

New Method “B” of Measurement of Pass By Noise [R 51.03]

Pass-By Noise Regulations for M and N category vehicles

Additional costly Instrumentation needed for Method B.

Pass-By Noise Regulations for M and N category vehicles

Pass-By Noise Regulations for M and N category vehicles

Pass-By Noise Regulations for M and N category vehicles

In current Method “A” – only front & rear most borders of the vehicles are observed to pass AA and BB lines respectively.

Difficulties with Testing of Low Powered Pick-ups by the new Method B :

• Vehicles of low power / PMR have poor acceleration and hence their noise during urban driving conditions is not influenced by constant speed running of the vehicle.

• Neither the target-acceleration of the vehicle has any relation with its Pass By Noise in city highways of India.

Pass-By Noise Regulations for M and N category vehicles

Following Revision is needed in R51 in order to alignment of IS 3028 with ECE.

• Inclusion of a clause for Testing as per Method B in 3.1.2.2 of Annex 10:

• Vehicles belonging to M1 and N1 category, but with PMR [< 25] and [Power < 40 kW] need be tested as per those conditions specified for M2> 3500 kg and N2 category vehicles (as per 3.1.2.2 of Annex 10) :

Pass-By Noise Regulations for M and N category vehicles

Pass-By Noise Regulations for M and N category vehicles

The GRB chair informed that necessary corrections in the working document will be submitted as an Informal document in the 61st session planned from 27th ~29th Jan 2015

GRB 60th Session : R51-03 discussion:

*/= Phase-3 limits will be reviewed 1 years before its implementation

(2-Years AEIF) (10-Years AEIF)

AEIF=After entry into force of 03 series,

(6-Years AEIF)

Pass-By Noise Regulations for M and N category vehicles

VEHICLE CATEGORY & NOISE LIMITS (DRAFT UN R51-03)

Pass-By Noise Regulations for M and N category vehicles Impementation Dates :

Foreseen key dates

Establish more efficient ways to conduct the New Test Finalize the Noise Limits ---with technically feasible solutions

Provide adequate development time before implementation

Pass-By Noise Regulations for M and N category vehicles

Pass-By Noise Regulations for M and N category vehicles

India position :

Change proposed through BIS for update in test procedure for N1 low power (<25Kw).

In order to present India perspective in the global context, it has been proposed to collect

all vehicle noise data as per current IS-3028 and the new regulation Method-B from all

OEMs through SIAM.

A following format has been made and circulated to SIAM.

Pass-By Noise Regulations for M and N category vehicles

Pass-By Noise Regulations for M and N category vehicles Revision of IS 3028: 1998 – Discussion under TED 4 committee

Committee requested the panel convener to prepare a draft amendment to IS 3028 restricting the scope for all vehicles excluding two wheelers.

Existing IS 3028:1998 covers the scope of all motor vehicles.

Since the revised IS 3028:1998 is under alignment with ECE R 51.03.

The Scope of R51.03 applies to vehicles of category M & N with regard to noise. It does not cover the scope of L2 category vehicles (Two Wheelers).

Committee agreed to the proposal to prepare the separate standard for L2 Category Vehicles(Two Wheelers) based on ECE R 41.

THANK YOU