View Source

40 C.F.R. § 600.113-12

Fuel economy, CO2 emissions, and carbon-related exhaust emission calculations for FTP, HFET, US06, SC03 and cold temperature FTP tests.

§ 600.113-12 Fuel economy, CO2 emissions, and carbon-related exhaust emission calculations for FTP, HFET, US06, SC03 and cold temperature FTP tests.

The Administrator will use the calculation procedure set forth in this paragraph for all official EPA testing of vehicles fueled with gasoline, diesel, alcohol-based or natural gas fuel. The calculations of the weighted fuel economy and carbon-related exhaust emission values require input of the weighted grams/mile values for total hydrocarbons (HC), carbon monoxide (CO), and carbon dioxide (CO2); and, additionally for methanol-fueled automobiles, methanol (CH3OH) and formaldehyde (HCHO); and, additionally for ethanol-fueled automobiles, methanol (CH3OH), ethanol (C2H5OH), acetaldehyde (C2H4O), and formaldehyde (HCHO); and additionally for natural gas-fueled vehicles, non-methane hydrocarbons (NMHC) and methane (CH4). For manufacturers selecting the fleet averaging option for N2O and CH4 as allowed under § 86.1818 of this chapter the calculations of the carbon-related exhaust emissions require the input of grams/mile values for nitrous oxide (N2O) and methane (CH4). Emissions shall be determined for the FTP, HFET, US06, SC03 and cold temperature FTP tests. Additionally, the specific gravity, carbon weight fraction and net heating value of the test fuel must be determined. The FTP, HFET, US06, SC03 and cold temperature FTP fuel economy and carbon-related exhaust emission values shall be calculated as specified in this section. An example fuel economy calculation appears in Appendix II of this part.

(a) Calculate the FTP fuel economy as follows:

(1) Calculate the weighted grams/mile values for the FTP test for CO2, HC, and CO, and where applicable, CH3OH, C2H5OH, C2H4O, HCHO, NMHC, N2O, and CH4 as specified in 40 CFR 1066.605. Measure and record the test fuel's properties as specified in paragraph (f) of this section.

(2) Calculate separately the grams/mile values for the cold transient phase, stabilized phase and hot transient phase of the FTP test. For vehicles with more than one source of propulsion energy, one of which is a rechargeable energy storage system, or vehicles with special features that the Administrator determines may have a rechargeable energy source, whose charge can vary during the test, calculate separately the grams/mile values for the cold transient phase, stabilized phase, hot transient phase and hot stabilized phase of the FTP test.

(b) Calculate the HFET fuel economy as follows:

(1) Calculate the mass values for the highway fuel economy test for HC, CO, and CO2, and where applicable, CH3OH, C2H5OH, C2H4O, HCHO, NMHC, N2O, and CH4 as specified in 40 CFR 1066.605. Measure and record the test fuel's properties as specified in paragraph (f) of this section.

(2) Calculate the grams/mile values for the highway fuel economy test for HC, CO, and CO2, and where applicable CH3OH, C2H5OH, C2H4O, HCHO, NMHC, N2O, and CH4 by dividing the mass values obtained in paragraph (b)(1) of this section, by the actual driving distance, measured in miles, as specified in 40 CFR 1066.840.

(c) Calculate the cold temperature FTP fuel economy as follows:

(1) Calculate the weighted grams/mile values for the cold temperature FTP test for HC, CO, and CO2, and where applicable, CH3OH, C2H5OH, C2H4O, HCHO, NMHC, N2O, and CH4 as specified in 40 CFR 1066.605.

(2) Calculate separately the grams/mile values for the cold transient phase, stabilized phase and hot transient phase of the cold temperature FTP test as specified in 40 CFR 1066.605.

(3) Measure and record the test fuel's properties as specified in paragraph (f) of this section.

(d) Calculate the US06 fuel economy as follows:

(1) Calculate the total grams/mile values for the US06 test for HC, CO, and CO2, and where applicable, CH3OH, C2H5OH, C2H4O, HCHO, NMHC, N2O, and CH4 as specified in 40 CFR 1066.605.

(2) Calculate separately the grams/mile values for HC, CO, and CO2, and where applicable, CH3OH, C2H5OH, C2H4O, HCHO, NMHC, N2O, and CH4, for both the US06 City phase and the US06 Highway phase of the US06 test as specified in 40 CFR 1066.605 and 1066.831. In lieu of directly measuring the emissions of the separate city and highway phases of the US06 test according to the provisions of 40 CFR 1066.831, the manufacturer may optionally, with the advance approval of the Administrator and using good engineering judgment, analytically determine the grams/mile values for the city and highway phases of the US06 test. To analytically determine US06 City and US06 Highway phase emission results, the manufacturer shall multiply the US06 total grams/mile values determined in paragraph (d)(1) of this section by the estimated proportion of fuel use for the city and highway phases relative to the total US06 fuel use. The manufacturer may estimate the proportion of fuel use for the US06 City and US06 Highway phases by using modal CO2, HC, and CO emissions data, or by using appropriate OBD data (e.g., fuel flow rate in grams of fuel per second), or another method approved by the Administrator.

(3) Measure and record the test fuel's properties as specified in paragraph (f) of this section.

(e) Calculate the SC03 fuel economy as follows:

(1) Calculate the grams/mile values for the SC03 test for HC, CO, and CO2, and where applicable, CH3OH, C2H5OH, C2H4O, HCHO, NMHC, N2O, and CH4 as specified in 40 CFR 1066.605.

(2) Measure and record the test fuel's properties as specified in paragraph (f) of this section.

(f) Analyze and determine fuel properties as follows:

(1) Gasoline test fuel properties shall be determined by analysis of a fuel sample taken from the fuel supply. A sample shall be taken after each addition of fresh fuel to the fuel supply. Additionally, the fuel shall be resampled once a month to account for any fuel property changes during storage. Less frequent resampling may be permitted if EPA concludes, on the basis of manufacturer-supplied data, that the properties of test fuel in the manufacturer's storage facility will remain stable for a period longer than one month. The fuel samples shall be analyzed to determine the following fuel properties:

(i) Specific gravity measured using ASTM D 1298 (incorporated by reference in § 600.011).

(ii) Carbon weight fraction measured using ASTM D 3343 (incorporated by reference in § 600.011).

(iii) Net heating value (Btu/lb) determined using ASTM D 3338/D 3338M (incorporated by reference in § 600.011).

(2) Methanol test fuel shall be analyzed to determine the following fuel properties:

(i) Specific gravity using ASTM D 1298 (incorporated by reference in § 600.011). You may determine specific gravity for the blend, or you may determine specific gravity for the gasoline and methanol fuel components separately before combining the results using the following equation:

SG = SGg × volume fraction gasoline + SGm × volume fraction methanol.

(ii)

(A) Carbon weight fraction using the following equation:

CWF = CWFg × MFg + 0.375 × MFm

Where:

CWFg = Carbon weight fraction of gasoline portion of blend measured using ASTM D 3343 (incorporated by reference in § 600.011). MFg = Mass fraction gasoline = (G × SGg)/(G × SGg + M × SGm) MFm = Mass fraction methanol = (M × SGm)/(G × SGg + M × SGm)

Where:

G = Volume fraction gasoline. M = Volume fraction methanol. SGg = Specific gravity of gasoline as measured using ASTM D 1298 (incorporated by reference in § 600.011). SGm = Specific gravity of methanol as measured using ASTM D 1298 (incorporated by reference in § 600.011).

(B) Upon the approval of the Administrator, other procedures to measure the carbon weight fraction of the fuel blend may be used if the manufacturer can show that the procedures are superior to or equally as accurate as those specified in this paragraph (f)(2)(ii).

This document is only available to subscribers. Please log in or purchase access.
Purchase Login

About SCCE

The Society of Corporate Compliance and Ethics (SCCE) is a non-profit, member-based professional association. SCCE supports our members' work with education, news, and discussion forums. We are a community of leaders, defining and shaping the corporate compliance environment across a wide range of industries and geographic regions. In developing and maintaining effective ethics and compliance programs, our members strengthen and protect their companies.

952.933.4977

About HCCA

The Health Care Compliance Association (HCCA), is a 501(c)6 non-profit, member-based professional association. HCCA was established in 1996 and is headquartered in Minneapolis, MN. We provide training, certification, and other resources to over 10,000 members. Our members include compliance officers and staff from a wide range of organizations, including hospitals, research facilities, clinics and technology service providers.

952.988.0141

Facebook X LinkedIn
Copyright © 2024 by Society of Corporate Compliance and Ethics (SCCE) & Health Care Compliance Association (HCCA). No claim to original US Government works. All rights reserved. All information provided through this site, including without limitation all information such as the “look and feel” of the site, data files, graphics, text, photographs, drawings, logos, images, sounds, music, video or audio files on this site, is owned and/or licensed by SCCE & HCCA or its suppliers and is subject to United States and international copyright, trademark and other intellectual property laws. Any third party logos and/or content provided herein is owned by such third parties and is used by permission herein. Your use of this site to is subject to our Terms Of Use and Privacy Statement.
Cookie settings