§ 89.416-96 - Raw exhaust gas flow.

The exhaust gas flow shall be determined by one of the methods described in this section and conform to the tolerances of Table 3 in appendix A to subpart D:

(a) Measurement of the air flow and the fuel flow by suitable metering systems (for details see SAE J244. This procedure has been incorporated by reference. See § 89.6.) and calculation of the exhaust gas flow as follows:

GEXHW=GAIRW+GFUEL(for wet exhaust mass) or VEXHD=VAIRD+(−.767)×GFUEL(for dry exhaust volume) or VEXHW=VAIRW+.749×GFUEL(for wet exhaust volume)

(b) Exhaust mass calculation from fuel consumption (see § 89.415-96) and exhaust gas concentrations using the method found in § 89.418-96.