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TITLE 40 - PROTECTION OF ENVIRONMENT
CHAPTER I - ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER C - AIR PROGRAMS
PART 86 - CONTROL OF EMISSIONS FROM NEW AND IN - USE HIGHWAY VEHICLES AND ENGINES
subpart n - EMISSION REGULATIONS FOR NEW OTTO - CYCLE AND DIESEL HEAVY - DUTY ENGINES; GASEOUS AND PARTICULATE EXHAUST TEST PROCEDURES
86.1362 - 2007 - Steady - state testing with a ramped - modal cycle.
This section describes how to test engines under steady-state conditions. Manufacturers may alternatively use the procedures specified in 86.13632007 through the 2009 model year.
(a) Start sampling at the beginning of the first mode and continue sampling until the end of the last mode. Calculate emissions as described in 40 CFR 1065.650 and cycle statistics as described in
(b) Measure emissions by testing the engine on a dynamometer with the following ramped-modal duty cycle to determine whether it meets the applicable steady-state emission standards: ---------------------------------------------------------------------------------------------------------------- Time in mode RMC mode (seconds) Engine speed1,2 Torque (percent)2,3 ---------------------------------------------------------------------------------------------------------------- 1a Steady-state........................ 170 Warm Idle.................. 0 1b Transition.......................... 20 Linear Transition.......... Linear Transition 2a Steady-state........................ 170 A.......................... 100 2b Transition.......................... 20 A.......................... Linear Transition 3a Steady-state........................ 102 A.......................... 25 3b Transition.......................... 20 A.......................... Linear Transition 4a Steady-state........................ 100 A.......................... 75 4b Transition.......................... 20 A.......................... Linear Transition 5a Steady-state........................ 103 A.......................... 50 5b Transition.......................... 20 Linear Transition.......... Linear Transition 6a Steady-state........................ 194 B.......................... 100 6b Transition.......................... 20 B.......................... Linear Transition 7a Steady-state........................ 219 B.......................... 25 7b Transition.......................... 20 B.......................... Linear Transition 8a Steady-state........................ 220 B.......................... 75 8b Transition.......................... 20 B.......................... Linear Transition 9a Steady-state........................ 219 B.......................... 50 9b Transition.......................... 20 Linear Transition.......... Linear Transition 10a Steady-state....................... 171 C.......................... 100 10b Transition......................... 20 C.......................... Linear Transition 11a Steady-state....................... 102 C.......................... 25 11b Transition......................... 20 C.......................... Linear Transition 12a Steady-state....................... 100 C.......................... 75 12b Transition......................... 20 C.......................... Linear Transition 13a Steady-state....................... 102 C.......................... 50 13b Transition......................... 20 Linear Transition.......... Linear Transition 14 Steady-state........................ 168 Warm Idle.................. 0 ---------------------------------------------------------------------------------------------------------------- \1\ Speed terms are defined in 40 CFR part 1065.
\2\ Advance from one mode to the next within a 20-second transition phase. During the transition phase, command a linear progression from the speed or torque setting of the current mode to the speed or torque setting of the next mode.
\3\ The percent torque is relative to maximum torque at the commanded engine speed.
(c) During idle mode, operate the engine with the following parameters: (1) Hold the speed within your specifications.
(2) Set the engine to operate at its minimum fueling rate.
(3) Keep engine torque under 5 percent of maximum test torque.
(d) For full-load operating modes, operate the engine at its maximum fueling rate.
(e) See 40 CFR part 1065 for detailed specifications of tolerances and calculations.
(f) Perform the ramped-modal test with a warmed-up engine. If the ramped-modal test follows directly after testing over the Federal Test Procedure, consider the engine warm. Otherwise, operate the engine to warm it up as described in 40 CFR part 1065, subpart F.
[70 FR 40439, July 13, 2005]
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