(a) Ambient temperature cycle for the diurnal emission portion of the evaporative emission test (see § 86.133 ).
Table I-Temperature Versus Time Sequence
Use linear interpolation between hourly temperatures | |||||
Time (min) | Temp. (°F) | Time (min) | Temp. (°F) | Time (min) | Temp. (°F) |
0 | 72.0 | 60 | 72.5 | 120 | 75.5 |
180 | 80.3 | 240 | 85.2 | 300 | 89.4 |
360 | 93.1 | 420 | 95.1 | 480 | 95.8 |
540 | 96.0 | 600 | 95.5 | 660 | 94.1 |
720 | 91.7 | 780 | 88.6 | 840 | 85.5 |
900 | 82.8 | 960 | 80.9 | 1020 | 79.0 |
1080 | 77.2 | 1140 | 75.8 | 1200 | 74.7 |
1260 | 73.9 | 1320 | 73.3 | 1380 | 72.6 |
1440 | 72.0 | 1500 | 72.5 | 1560 | 75.5 |
1620 | 80.3 | 1680 | 85.2 | 1740 | 89.4 |
1800 | 93.1 | 1860 | 95.1 | 1920 | 95.8 |
1980 | 96.0 | 2040 | 95.5 | 2100 | 94.1 |
2160 | 91.7 | 2220 | 88.6 | 2280 | 85.5 |
2340 | 82.8 | 2400 | 80.9 | 2460 | 79.0 |
2520 | 77.2 | 2580 | 75.8 | 2640 | 74.7 |
2700 | 73.9 | 2760 | 73.3 | 2820 | 72.6 |
2880 | 72.0 | 2940 | 72.5 | 3000 | 75.5 |
3060 | 80.3 | 3120 | 85.2 | 3180 | 89.4 |
3240 | 93.1 | 3300 | 95.1 | 3360 | 95.8 |
3420 | 96.0 | 3480 | 95.5 | 3540 | 94.1 |
3600 | 91.7 | 3660 | 88.6 | 3720 | 85.5 |
3780 | 82.8 | 3840 | 80.9 | 3900 | 79.0 |
3960 | 77.2 | 4020 | 75.8 | 4080 | 74.7 |
4140 | 73.9 | 4200 | 73.3 | 4260 | 72.6 |
4320 | 72.9 |
40 C.F.R. 86 app II to Part 86