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40 C.F.R. § 1037.515

Determining CO2 emissions to show compliance for trailers.

§ 1037.515 Determining CO2 emissions to show compliance for trailers.

This section describes a compliance approach for trailers that is consistent with the modeling for vocational vehicles and tractors described in § 1037.520, but is simplified consistent with the smaller number of trailer parameters that affect CO2 emissions. Note that the calculated CO2 emission rate, eCO2, is equivalent to the value that would result from running GEM with the same input values.

(a) Compliance equation. Calculate CO2 emissions for demonstrating compliance with emission standards for each trailer configuration.

(1) Use the following equation:

er25oc16.088.gif

Where:

Ci = constant values for calculating CO2 emissions from this regression equation derived from GEM, as shown in Table 1 of this section. Let C5 = 0.988 for trailers that have automatic tire inflation systems with all wheels, and let C5 = 0.990 for trailers that have tire pressure monitoring systems with all wheels (or a mix of the two systems); otherwise, let C5 1. TRRL = tire rolling resistance level as specified in paragraph (b) of this section. ΔCdA = the ΔCdA value for the trailer as specified in paragraph (c) of this section. WR = weight reduction as specified in paragraph (d) or (e) of this section.

Table 1 of § 1037.515—Regression Coefficients for Calculating CO2 Emissions

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