SIAM – JAMA TWO WHEELER GROUP

MEETING

31st  October 2014 , INDIA

RECENT DEVELOPMENTS ON INDIAN EMISSION NORMS

WMTC classification

Limits values ( g/km)

CO HC+ NOx

Class 1 & Sub class 2.1 1.87 1.08

Sub Class 2.2 1.87 1.08

Sub Class 3.1 & 3.2 2.62 0.92

BS III Emission Limits ( WMTC)

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Introduction

Notified by government vide GSR 515(E) June 2012

Two wheelers( Gasoline)

CO HC+ NOx

Limit values ( g/km) 1.00 1.00

Effective Limit values considering DF of 1.2 (g/km) 0.83 0.83

BS III Emission Limits ( IDC)

Notified by government vide GSR 84(E) Feb 2009

DF is Built in alternate proposal for CO & HC+NOx. DF = 1.2 for both CO , HC+NOx.

Norms came into force from April 2010 Alternate test procedure and its corresponding limits.

BS IV – Critical events• Sep 2011 – Dec 2012 : SIAM data study & making consensus on BS IV.• Dec 2012 : Proposal submitted to Government.• April 2013 : SIAM explained industry idea to Government MoRTH & SCOE.

WMTC classification

Max speed (km/

hr.) Test Cycles

Weighting factors for final

emission results CO

(g/km)

If the evaporative

emission complies

with 2g/test

If the evaporative

emission complies

with 6g/test

Remarks

HC+NO x (g/km)

a. DF is built into proposed draft notification..

b. Implementation from 1st April 2015.

Class 1 &

Sub Class 2.1

<100

< 115Part 1 RS Cold + Part 1 RS hot

50 % + 50 % 1.403 0.89 0.69

Sub Class 2.2 < 130 Part 1 Cold + Part 2 hot

30 % + 70 % 1.920 0.69 0.49

Sub Class 3.1 & 3.2 < 140 Part 1 cold + Part 2 hot + Part 3 RS hot

25 % + 50 % + 25 % 1.920 0.42 0.22

1. Tail Pipe emissions

2. Evaporative emissions : HC ≤ 2 g/test (option ≤ 6 g/test with 0.2 g/km reduction in tail pipe emission HC + NOx)

3. Crankcase emissions : Shall not permit crankcase gases into the atmosphere

BS IV draft notification GSR 186(E) – Mar 2014.

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Chronological events

Auto fuel policy ( AFP) committee• AFP committee has felt positive about bringing a limit values for evaporative emissions & control of

crankcase gas emissions in BS IV. However the tail pipe emission limits, are some what on lenient side..

• Given the importance of two wheelers play in improving and providing mobility in India for large section

of society, AFP committee felt the need for reducing emissions and also improving Fuel economy.

• Also AFP has looked into the limit values considering the overall situation (eco system) of fuel

availability, complexity of changes and associated costs and long term perspective of the industry.

• Use of lean mixtures, while improving fuel economy and CO emissions, tend to increase NOx emissions.

• In order to control the likely NOx emission from two wheelers, an additional limit for NOx is being

proposed with an overall limit on HC + Nox and communicated to “SCOE”, the nodal agency responsible

for issue of notifications.

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WMTC classification

Max speed

(km/ hr.) Test Cycles

Weighting factors for

final emission results

CO (g/km)

NOx cap

added

If the evaporative

emission complies

with 2g/test

If the evaporative

emission complies

with 6g/test

Changes made by AFP to draft notification.

HC+NO x (g/km) a. NOx Cap added

b. HC + NOx limit values reduced.

c. DF is built into proposed limits.

d. Implementation postponed to Apr ’16 for new models & Apr’ 17 for existing models

Class 1 &

Sub Class 2.1

<100

< 115Part 1 RS Cold + Part 1 RS hot

50 % + 50 % 1.403 0.390 0.790 0.590

Sub Class 2.2 < 130 Part 1 Cold + Part 2 hot

30 % + 70 % 1.920 0.340 0.670 0.470

Sub Class 3.1 & 3.2 < 140Part 1 cold + Part 2 hot + Part 3 RS hot

25 % + 50 % + 25 % 1.920 0.200 0.400 0.200

Auto fuel policy ( AFP) committee recommendations for BS IV5

AFP Outcome BS IV

<Final notification by government was issued vide GSR 431(E) Dt 4th July 2014. reflecting the recommendations made by AFP>

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BS V emission Limit values ( g/km) TA = COP

WMTC Class Limit values

proposed by AFP committee

CO NO x HC+NO x

Class 1 & 2.1 1.140 0.225 0.450

Class 2.2 1.140 0.225 0.450

Class 3.1 and 3.2 1.140 0.130 0.260

D.F. 1.3 1.2 1.2

New models types from April 2020 & Existing models from April 2021

BS V Limits proposed in AFP Expert Committee Report

Source: AFP Outcome BS V – Cabinet Approval pending

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Thank you for your attention