40 CFR 89.416 - 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)
VEXHD = VAIRD (−.767) × GFUEL(for dry exhaust volume)
VEXHW = VAIRW .749 × GFUEL(for wet exhaust volume)
(b) Exhaust mass calculation from fuel consumption (see § 89.415) and exhaust gas concentrations using the method found in § 89.418.
[59 FR 31335, June 17, 1994. Redesignated at 63 FR 56996, Oct. 23, 1998]
Title 40 published on 2013-07-01
no entries appear in the Federal Register after this date.