[Code of Federal Regulations]
[Title 40, Volume 30]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1051.501]
[Page 626-627]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 1051_CONTROL OF EMISSIONS FROM RECREATIONAL ENGINES AND VEHICLES
--Table of Contents
Subpart F_Test Procedures
Sec. 1051.501 What procedures must I use to test my vehicles or engines?
This section describes test procedures that you use to show
compliance with the requirements of this part. See Sec. 1051.235 to
determine when testing is required for certification. See subpart D of
this part for the production-line testing requirements.
(a) Snowmobiles. For snowmobiles, use the equipment and procedures
for spark-ignition engines in part 1065 of this chapter to show your
snowmobiles meet the duty-cycle emission standards in Sec. 1051.103.
Measure HC, NOX (as applicable), CO, and CO2
emissions using the dilute sampling procedures in part 1065 of this
chapter. For steady-state testing, you may use raw-gas sampling methods
(such as those described in 40 CFR part 91), provided they have been
shown to produce measurements equivalent to the dilute sampling methods
specified in part 1065 of this chapter. Use the duty cycle in Sec.
1051.505.
(b) Motorcycles and ATVs. For motorcycles and ATVs, use the
equipment, procedures, and duty cycle in 40 CFR part 86, subpart F, to
show your vehicles meet the exhaust emission standards in Sec. 1051.105
or Sec. 1051.107. Measure HC, NOX, CO, and CO2.
If we allow you to certify ATVs based on engine testing, use the
equipment, procedures, and duty cycle described or referenced in that
section that allows engine testing. For motorcycles with engine
displacement at or below 169 cc and all ATVs, use the driving schedule
in paragraph (c) of Appendix I to 40 CFR part 86. For all other
motorcycles use the driving schedule in paragraph (b) of Appendix I to
part 86. With respect to vehicle-speed governors, test motorcycles and
ATVs in their ungoverned configuration, unless we approve in advance
testing in a governed configuration. We will only approve testing in a
governed configuration if you can show that the governor is permanently
installed on all production vehicles and is unlikely to be removed in-
use. With respect to engine-speed governors, test motorcycles and ATVs
in their governed configuration.
(c) Permeation testing. (1) Use the equipment and procedures
specified in Sec. 1051.515 to measure fuel tank permeation emissions.
(2) Prior to permeation testing of fuel hose, the hose must be
preconditioned by filling the hose with the fuel specified in (d)(3) of
this section, sealing the openings, and soaking the hose for 4 weeks at
23 [deg]C5 [deg]C. To measure fuel-line permeation
emissions, use the equipment and procedures specified in SAE J30
(incorporated by reference in Sec. 1051.810). The measurements must be
performed at 23 [deg]C using the fuel specified in paragraph (d)(3) of
this section.
(d) Fuels. Use the fuels meeting the following specifications:
[[Page 627]]
(1) Exhaust. Use the fuels and lubricants specified in 40 CFR part
1065, subpart C, for all the testing and service accumulation we require
in this part.
(2) Fuel Tank Permeation. (i) For the preconditioning soak described
in Sec. 1051.515(a)(1) and fuel slosh durability test described in
Sec. 1051.515(d)(3), use the fuel specified in Table 1 of Sec.
1065.210 of this chapter blended with 10 percent ethanol by volume. As
an alternative, you may use Fuel CE10, which is Fuel C as specified in
ASTM D 471-98 (incorporated by reference in Sec. 1051.810) blended with
10 percent ethanol by volume.
(ii) For the permeation measurement test in Sec. 1051.515(b), use
the fuel specified in Table 1 of Sec. 1065.210 of this chapter. As an
alternative, you may use the fuel specified in paragraph (d)(2)(i) of
this section.
(3) Fuel Hose Permeation. Use the fuel specified in Table 1 of Sec.
1065.210 of this chapter blended with 10 percent ethanol by volume for
permeation testing of fuel lines. As an alternative, you may use Fuel
CE10, which is Fuel C as specified in ASTM D 471-98 (incorporated by
reference in Sec. 1051.810) blended with 10 percent ethanol by volume.
(e) Special procedures for engine testing. (1) You may use special
or alternate procedures, as described in Sec. 1065.10 of this chapter.
(2) We may reject data you generate using alternate procedures if
later testing with the procedures in part 1065 of this chapter shows
contradictory emission data.
(f) Special procedures for vehicle testing. (1) You may use special
or alternate procedures, as described in paragraph (f)(3) of this
section.
(2) We may reject data you generate using alternate procedures if
later testing with the otherwise specified procedures shows
contradictory emission data.
(3)(i) The test procedures specified for vehicle testing are
intended to produce emission measurements equivalent to those that would
result from measuring emissions during in-use operation using the same
vehicle configuration. If good engineering judgment indicates that use
of the procedures in this part for a vehicle would result in
measurements that are not representative of in-use operation of that
vehicle, you must notify us. If we determine that using these procedures
would result in measurements that are significantly unrepresentative and
that changes to the procedures will result in more representative
measurements that do not decrease the stringency of emission standards
or other requirements, we will specify changes to the procedures. In
your notification to us, you should recommend specific changes you think
are necessary.
(ii) You may ask to use emission data collected using other test
procedures, such as those of the California Air Resources Board or the
International Organization for Standardization. We will allow this only
if you show us that these data are equivalent to data collected using
our test procedures.
(iii) You may ask to use alternate procedures that produce
measurements equivalent to those obtained using the specified
procedures. In this case, send us a written request showing that your
alternate procedures are equivalent to the test procedures of this part.
If you prove to us that the procedures are equivalent, we will allow you
to use them. You may not use alternate procedures until we approve them.
(iv) You may ask to use special test procedures if your vehicle
cannot be tested using the specified test procedures (for example, it is
incapable of operating on the specified transient cycle). In this case,
send us a written request showing that you cannot satisfactorily test
your engines using the test procedures of this part. We will allow you
to use special test procedures if we determine that they would produce
emission measurements that are representative of those that would result
from measuring emissions during in-use operation. You may not use
special procedures until we approve them.
[67 FR 68347, Nov. 8, 2002, as amended at 69 FR 2442, Jan. 15, 2004]