§ 86.090-2 Definitions.
The definitions in § 86.088–2 remain effective. The definitions in this section apply beginning with the 1990 model year.
Averaging for heavy-duty engines means the exchange of NOX and particulate emission credits among engine families within a given manufacturer's product line.
Averaging set means a subcategory of heavy-duty engines within which engine families can average and trade emission credits with one other.
Banking means the retention of heavy-duty engine NOX and particulate emission credits, by the manufacturer generating the emission credits, for use in future model year certification programs as permitted by regulation.
Composite particulate standard, for a manufacturer which elects to average light-duty vehicles and light-duty trucks together in either the petroleum-fueled or methanol-fueled light-duty particulate averaging program, means that standards calculated using the following equation and rounded to the nearest one-hundredth (0.01) of a gram per mile:
Where: