(a) Determine the mass of exhaust emissions of each pollutant for each FTP test interval as described in Sec. 1066.605.
(b) Calculate the final composite gaseous test results as a mass-weighted value, e[emission]-FTPcomp, in grams per mile using the following equation:[GRAPHIC] [TIFF OMITTED] TR28AP14.136 Where: mc = the combined mass emissions determined from the cold-
start UDDS test interval (generally known as bag 1 and bag 2),
in grams.Dct = the measured driving distance from the transient
portion of the cold-start test (bag 1), in miles.Dcs = the measured driving distance from the stabilized
portion of the cold-start test (bag 2), in miles.mh = the combined mass emissions determined from the hot-
start UDDS test interval in grams. This is the hot-stabilized
portion from either the first or second UDDS (bag 2, unless
you measure bag 4), in addition to the hot transient portion
(bag 3).Dht = the measured driving distance from the transient
portion of the hot-start test (bag 3), in miles.Dhs = the measured driving distance from the stabilized
portion of the hot-start test (bag 4), in miles. Set
Dhs = Dcs for testing where the hot-
stabilized portion of the UDDS is not run.
(c) Calculate the final composite PM test results as a mass-weighted value, ePM-FTPcomp, in grams per mile as follows:
(1) Use the following equation for PM measured as described in Sec. 1066.815(b)(1), (2), or (3):[GRAPHIC] [TIFF OMITTED] TR28AP14.137 Where: mPM-cUDDS = the combined PM mass emissions determined from
the cold-start UDDS test interval (bag 1 and bag 2), in grams,
as calculated using Eq. 1066.605-2.mPM-hUDDS = the combined PM mass emissions determined from
the hot-start UDDS test interval (bag 3 and bag 4), in grams,
as calculated using Eq. 1066.605-2. This is the hot-stabilized
portion from either the first or second UDDS (bag 2, unless
you measure bag 4), in addition to the hot transient portion
(bag 3).
(2) Use the following equation for PM measured as described in Sec. 1066.815(b)(4):[GRAPHIC] [TIFF OMITTED] TR28AP14.138 Where: mPM = the combined PM mass emissions determined from the
cold-start UDDS test interval and the first 505 seconds of the
hot-start UDDS test interval (bag 1, bag 2, and bag 3), in
grams, as calculated using Eq. 1066.605-3.
(3) Use the following equation for PM measured as described in Sec. 1066.815(b)(5):[GRAPHIC] [TIFF OMITTED] TR28AP14.139 Where: mPM = the combined PM mass emissions determined from the
cold-start UDDS test interval and the hot-start UDDS test
interval (bag 1, bag 2, bag 3, and bag 4), in grams, as
calculated using Eq. 1066.605-4.