Assume a hypothetical manufacturer (Manufacturer X) produces a fleet of domestic passenger automobiles in MY 2012 as follows:
Appendix A Table I
| Model type | Description | Actual measured fuel economy (mpg) |
Volume | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Group | Carline name | Basic engine (L) |
Transmission class | |||||||
| 1 | PC A FWD | 1.8 | A5 | 2-door sedan | 34.0 | 1,500 | ||||
| 2 | PC A FWD | 1.8 | M6 | 2-door sedan | 34.6 | 2,000 | ||||
| 3 | PC A FWD | 2.5 | A6 | 4-door wagon | 33.8 | 2,000 | ||||
| 4 | PC A AWD | 1.8 | A6 | 4-door wagon | 34.4 | 1,000 | ||||
| 5 | PC A AWD | 2.5 | M6 | 2-door hatchback | 32.9 | 3,000 | ||||
| 6 | PC B RWD | 2.5 | A6 | 4-door wagon | 32.2 | 8,000 | ||||
| 7 | PC B RWD | 2.5 | A7 | 4-door sedan | 33.1 | 2,000 | ||||
| 8 | PC C AWD | 3.2 | A7 | 4-door sedan | 30.6 | 5,000 | ||||
| 9 | PC C FWD | 3.2 | M6 | 2-door coupe | 28.5 | 3,000 | ||||
| Total | 27,500 | |||||||||
Note to Appendix A Table I: Manufacturer X's required fleet average fuel economy standard level would first be calculated by determining the fuel economy targets applicable to each unique model type and footprint combination for model type groups 1-9 as illustrated in Appendix A Table II:
Manufacturer X calculates a fuel economy target standard for each unique model type and footprint combination.
Appendix A Table II
| Model type | Description | Base tire size | Wheelbase (inches) |
Track width F&R average (inches) |
Footprint (ft2) |
Volume | Fuel economy target standard (mpg) |
|||
|---|---|---|---|---|---|---|---|---|---|---|
| Group | Carline name | Basic engine (L) |
Transmission class | |||||||
| 1 | PC A FWD | 1.8 | A5 | 2-door sedan | 205/75R14 | 99.8 | 61.2 | 42.4 | 1,500 | 35.01 |
| 2 | PC A FWD | 1.8 | M6 | 2-door sedan | 215/70R15 | 99.8 | 60.9 | 42.2 | 2,000 | 35.14 |
| 3 | PC A FWD | 2.5 | A6 | 4-door wagon | 215/70R15 | 100.0 | 60.9 | 42.3 | 2,000 | 35.08 |
| 4 | PC A AWD | 1.8 | A6 | 4-door wagon | 235/60R15 | 100.0 | 61.2 | 42.5 | 1,000 | 35.95 |
| 5 | PC A AWD | 2.5 | M6 | 2-door hatchback | 225/65R16 | 99.6 | 59.5 | 41.2 | 3,000 | 35.81 |
| 6 | PC B RWD | 2.5 | A6 | 4-door wagon | 265/55R18 | 109.2 | 66.8 | 50.7 | 8,000 | 30.33 |
| 7 | PC B RWD | 2.5 | A7 | 4-door sedan | 235/65R17 | 109.2 | 67.8 | 51.4 | 2,000 | 29.99 |
| 8 | PC C AWD | 3.2 | A7 | 4-door sedan | 265/55R18 | 111.3 | 67.8 | 52.4 | 5,000 | 29.52 |
| 9 | PC C FWD | 3.2 | M6 | 2-door coupe | 225/65R16 | 111.3 | 67.2 | 51.9 | 3,000 | 29.76 |
| Total | 27,500 | |||||||||
Note to Appendix A Table II: With the appropriate fuel economy targets determined for each unique model type and footprint combination, Manufacturer X's required fleet average fuel economy standard would be calculated as illustrated in Appendix A Figure 1:
Appendix A Figure 1—Calculation of Manufacturer X's fleet average fuel economy standard using Table II:
Fleet average fuel economy standard =
= 31.6 mpg
Appendix A Figure 2—Calculation of Manufacturer X's actual fleet average fuel economy performance level using Table I:
Fleet average fuel economy performance =
= 32.0 mpg
Note to Appendix A Figure 2: Since the actual fleet average fuel economy performance of Manufacturer X's fleet is 32.0 mpg, as compared to its required fleet fuel economy standard of 31.6 mpg, Manufacturer X complied with the CAFE standard for MY 2012 as set forth in §531.5(c).
[77 FR 63191, Oct. 15, 2012, as amended at 84 FR 51362, Sept. 27, 2019]
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