[Code of Federal Regulations]

[Title 40, Volume 31]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR1051.501]



[Page 645-646]

 

                   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 determine 

whether vehicles meet the emission standards 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 40 CFR part 1065 to determine whether your 

snowmobiles meet the duty-cycle emission standards in Sec.  1051.103. 

Measure the emissions of all the pollutants we regulate in Sec.  

1051.103. Use the duty cycle specified 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 

determine whether your vehicles meet the exhaust emission standards in 

Sec.  1051.105 or Sec.  1051.107. Measure the emissions of all the 

pollutants we regulate in Sec.  1051.105 or Sec.  1051.107. If we allow 

you to certify ATVs based on engine testing, use the equipment, 

procedures, and duty cycle described or referenced in the 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. Run the test engine, with all emission-control systems 

operating, long enough to stabilize emission levels; you may consider 

emission levels stable without measurement if you accumulate 12 hours of 

operation.

    (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 paragraph 

(d)(3) of this section, sealing the openings, and soaking the hose for 4 

weeks at 23 5 [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 2 [deg]C using the fuel 

specified in paragraph (d)(3) of this section.

    (d) Fuels. Use the fuels meeting the following specifications:

    (1) Exhaust. Use the fuels and lubricants specified in 40 CFR part 

1065, subpart H, for all the exhaust testing we require in this part. 

For service accumulation, use the test fuel or any commercially 

available fuel that is representative of the fuel that in-use engines 

will use.

    (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 40 CFR 

1065.710 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 40 CFR 1065.710. As an



[[Page 646]]



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 40 

CFR 1065.710 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.

    (3) You may test engines using a test speed based on the point of 

maximum power if that represents in-use operation better than testing 

based on maximum test speed.

    (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; 70 

FR 40499, July 13, 2005]