European Customer Technology Centers - Delphi
European Customer Technology Centers - Delphi
European Customer Technology Centers - Delphi
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ECE<br />
Worldwide Harmonised Heavy Duty Emissions Certification Procedure<br />
Establishment of a harmonised Global Technical Regulation (GTR) covering the TA procedure for HD engine exhaust emissions, adopted on Nov 15, 2006<br />
Application: C.I. engines and P.I. engines fuelled w/ NG and LPG,<br />
design speed > 25 km/h and max mass > 3,5 tons.<br />
Two representative test cycles have been created covering typical driving<br />
conditions in the <strong>European</strong> Union, the USA, Japan and Australia:<br />
- one transient test cycle (WHTC)<br />
- one steady state test cycle (WHSC)<br />
The GTR does not contain emission limit values<br />
Exhaust Emissions to be measured: CO, HC, NMHC, NOx, PM, CO 2 ,<br />
expressed in g/kWh.<br />
If GTR applied in a national legislation, the limit values should represent at<br />
least the same level of severity as its existing regulations.<br />
Heavy Duty<br />
WHTC<br />
It is a second by second sequence of normalized speed and torque values.<br />
normalized load (M/Mmax(n))<br />
100%<br />
90%<br />
80%<br />
70%<br />
60%<br />
50%<br />
40%<br />
30%<br />
20%<br />
10%<br />
0%<br />
-10%<br />
-20%<br />
0<br />
300<br />
600<br />
100%<br />
90%<br />
80%<br />
70%<br />
60%<br />
50%<br />
40%<br />
30%<br />
20%<br />
10%<br />
0%<br />
M_norm_WHTC, final -10%<br />
n_norm_WHTC, final<br />
-20%<br />
900 1200 1500 1800<br />
times in s<br />
normalized speed<br />
7
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