Overview
The 6-mode cycle was used in Japan for testing of heavy-duty engines. It has been replaced by the newer 13-mode cycle and has only historical significance.
Categories
Description
The engine was tested over 6 different speed and load conditions. The modes were ran in sequence and the duration of each mode was 3 min. Emissions were measured at each mode and averaged over the cycle using a set of weighting factors. The final test result was expressed as volumetric concentration in ppm.
There were two definitions of the test modes and weighting factors: one for diesel engines and another one for gasoline and LPG engines. The diesel cycle parameters are listed in the table below:
| Mode | Speed (% of nominal) | Load (%) | Weighting factor |
|---|---|---|---|
| 1 | idle | – | 0.355 |
| 2 | 40 | 100 | 0.071 |
| 3 | 40 | 25 | 0.059 |
| 4 | 60 | 100 | 0.107 |
| 5 | 60 | 25 | 0.122 |
| 6 | 80 | 75 | 0.286 |
