Source: http://www.law.cornell.edu/cfr/text/40/86.127-96
Timestamp: 2015-01-25 16:35:45
Document Index: 75833076

Matched Legal Cases: ['art 86', '§ 86', '§ 86', '§ 86', '§ 86', '§ 86', '§ 86', '§ 86', '§ 86', '§ 86']

40 CFR 86.127-96 - Test procedures; overview. | LII / Legal Information Institute
CFR › Title 40 › Chapter I › Subchapter C › Part 86 › Subpart B › Section 86.127-96 40 CFR 86.127-96 - Test procedures; overview.
§ 86.127-96
The procedures described in this and subsequent sections are used to determine the conformity of vehicles with the standards set forth in subpart A of this part for light-duty vehicles and light-duty trucks.
The overall test consists of prescribed sequences of fueling, parking, and operating conditions. Vehicles are tested for any or all of the following emissions:
Gaseous exhaust THC, CO, NOX. CO2 (for petroleum-fueled and gaseous-fueled vehicles), plus CH3OH and HCHO for methanol-fueled vehicles, plus CH4 (for vehicles subject to the NMHC and NMHCE standards).
The Otto-cycle exhaust emission test is designed to determine gaseous THC, CO, CO2, CH4, NOX, and particulate mass emissions from gasoline-fueled, methanol-fueled and gaseous-fueled Otto-cycle vehicles as well as methanol and formaldehyde from methanol-fueled Otto-cycle vehicles, while simulating an average trip in an urban area of 11 miles (18 kilometers). The test consists of engine start-ups and vehicle operation on a chassis dynamometer through a specified driving schedule. A proportional part of the diluted exhaust is collected continuously for subsequent analysis, using a constant volume (variable dilution) sampler or critical flow venturi sampler.
The diesel-cycle exhaust emission test is designed to determine particulate and gaseous mass emissions during a test similar to the test in § 86.127(b). For petroleum-fueled diesel-cycle vehicles, diluted exhaust is continuously analyzed for THC using a heated sample line and analyzer; the other gaseous emissions (CH4, CO, CO2, and NOX) are collected continuously for analysis as in § 86.127(b). For methanol-fueled vehicles, THC, methanol, formaldehyde, CO, CO2, CH4, and NOX are collected continuously for analysis as in § 86.127(b). THC, methanol, and formaldehyde are collected using heated sample lines, and a heated FID is used for THC analyses. Simultaneous with the gaseous exhaust collection and analysis, particulates from a proportional part of the diluted exhaust are collected continuously on a filter. The mass of particulate is determined by the procedure described in § 86.139. This testing requires a dilution tunnel as well as the constant volume sampler.
Diurnal emissions resulting from daily temperature changes (as well as relatively constant resting losses), measured by the enclosure technique (see § 86.133);
Running losses resulting from a simulated trip performed on a chassis dynamometer, measured by the enclosure or point-source technique (see § 86.134; this test is not required for gaseous-fueled vehicles); and
Hot soak emissions, which result when the vehicle is parked and the hot engine is turned off, measured by the enclosure technique (see § 86.138).
Except in cases of component malfunction or failure, all emission control systems installed on or incorporated in a new motor vehicle shall be functioning during all procedures in this subpart. Maintenance to correct component malfunction or failure shall be authorized in accordance with § 86.090-25.
[58 FR 16032, Mar. 24, 1993, as amended at 59 FR 48508, Sept. 21, 1994; 60 FR 34347, June 30, 1995]