Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 6456

d) maximum Smoke Number. 3.4.3.2 The characteristic Smoke Number and gaseous pollutant emission levels shall be provided for each engine type for which emissions certification is sought. Note.— The characteristic level of the Smoke Number or gaseous pollutant emissions is the mean of the values of all the engines tested, measured and corrected to the reference standard engine and reference ambient conditions, divided by the coefficient corresponding to the number of engines tested, as shown in Appendix 6. 24/11/05 No. 5 2007/70/II. szám ANNEX 16 — VOLUME II 11/11/93 APPENDIX 1. MEASUREMENT OF REFERENCE PRESSURE RATIO 1. GENERAL 1.1 Pressure ratio shall be established using a representative engine. 1.2 Reference pressure ratio shall be derived by correlating measured pressure ratio with engine thrust corrected to standard day ambient pressure and entering this correlation at the standard day rated take-off thrust. 2. MEASUREMENT 2.1 Total pressure shall be measured at the last compressor discharge plane and the first compressor front face by positioning at least four probes so as to divide the air flow area into four equal sectors and taking a mean of the four values obtained. Note.— Compressor discharge total pressure may be obtained from total or static pressure measured at a position as close as possible to the compressor discharge plane. However, the certificating authority may approve alternative means of estimating the compressor discharge total pressure if the engine is so designed that the provision of the probes referred to above is impractical for the emissions test. 2.2 Necessary correlation factors shall be determined during type certification testing using a minimum of one engine and any associated engine component tests and analysis. 2.3 Procedures shall be acceptable to the certificating authority. 2007/70/II. szám 11/11/93 ANNEX 16 — VOLUME II APPENDIX 2. SMOKE EMISSION EVALUATION 1. INTRODUCTION AND DEFINITIONS Note.— The procedures specified here are concerned with the acquisition of representative exhaust samples and their transmission to, and analysis by, the emissions measuring system. 1.1 Variations in the procedure contained in this Appendix shall only be allowed after prior application to and approval by the certificating authority. 1.2 Where the following expressions and symbols are used in this Appendix, they have the meanings ascribed to them below: Sampling reference size. The sample mass, 16.2 kg/m2 of stained filter area, which if passed through the filter material results in a change of reflectance which gives a value of the SN parameter. Sampling size. A chosen exhaust sample, the magnitude of whose mass (expressed in kilograms per square metre of stained filter surface area) lies in the range prescribed in 2.5.3 h) of this Appendix which, when passed through the filter material, causes a change in reflectance yielding a value for the SN′ parameter. Sampling volume. The chosen sample volume (expressed in cubic metres) whose equivalent mass, calculated as indicated in 3 of this Appendix, conforms to the above definition of sampling size. SN. Smoke Number; Dimensionless term quantifying smoke emission level based upon the staining of a filter by the reference mass of exhaust gas sample, and rated on a scale of 0 to 100 (see 3 of this Appendix). SN′. Smoke Number obtained from an individual smoke sample, not necessarily of the reference size, as defined in 3 of this Appendix. W. Mass of individual exhaust gas smoke sample, in kilograms, calculated from the measurements of sample volume, pressure and temperature (see 3 of this Appendix). 2. MEASUREMENT OF SMOKE EMISSIONS 2.1 Sampling probe for smoke emissions

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