ECE R51 Stationary NoiseECE R51 Stationary Noise

4343rdrd Session GRB Session GRB21 February 200621 February 2006Geneva, SwitzerlandGeneva, Switzerland

Doug MooreDoug MooreConvenerConvener

ISO TC22 & TC43/SC1ISO TC22 & TC43/SC1WG42WG42

Informal document No. GRB-43-5 (43th GRB, 21-23 February 2006

agenda item 1.2.2.)

GRB Informal GRB Informal Document GRB-43-2Document GRB-43-2

At the request of GRB, ISO has provided At the request of GRB, ISO has provided updated figures and test procedures to updated figures and test procedures to carry out the stationary test carry out the stationary test requirement of Regulation 51.requirement of Regulation 51.

GRB has previously reviewed and GRB has previously reviewed and approved technical changes in the approved technical changes in the stationary test to account for technical stationary test to account for technical developments in engine protection. developments in engine protection. (Engine speed targets)(Engine speed targets)

GRB Informal GRB Informal Document GRB-43-2Document GRB-43-2

Regulation 51 Annex 3 paragraphs Regulation 51 Annex 3 paragraphs 3.2.3 and 3.2.5.3.1.6 are proposed to 3.2.3 and 3.2.5.3.1.6 are proposed to provide additional information provide additional information regarding the location of the reference regarding the location of the reference point for stationary measurements.point for stationary measurements.

These drawings are necessary to These drawings are necessary to accommodate the additional exhaust accommodate the additional exhaust configurations in use.configurations in use.

GRB Informal GRB Informal Document GRB-43-2Document GRB-43-2 Regulation 51 Annex 3 paragraphs 3.2.6 Regulation 51 Annex 3 paragraphs 3.2.6

to 3.2.6.2 define the measurement and to 3.2.6.2 define the measurement and data processing required to obtain correct data processing required to obtain correct results.results.

These paragraphs are proposed to These paragraphs are proposed to provide: 1) Repeatable and reproducible provide: 1) Repeatable and reproducible test results 2) Reduce the uncertainty test results 2) Reduce the uncertainty associated with the stationary associated with the stationary measurement results.measurement results.

Thank YouThank You