Measurement accuracies and the calculated uncertainties
| Parameter | Device | Accuracy |
|---|---|---|
| Engine speed | Incremental encoder | ± 5 r/min |
| In-cylinder pressure | Kistler 6118B | ± 0.3 bar |
| Petrol flow rate | Biotech VZS-005 | ± 1% (of reading) |
| Methane flow rate | New-Flow TLF | ± 1% (F.S.) |
| Carbon monoxide | AVL Digas 4000 | 0.01% vol. |
| THC | AVL Digas 4000 | 1 ppm |
| NOx | AVL Digas 4000 | 1 ppm |
| Calculated results | Uncertainty value | |
| Indicated specific energy consumption | ± 0.68 ÷ 0.79% | |
| Engine speed | Incremental encoder | ± 5 r/min |
| In-cylinder pressure | Kistler 6118B | ± 0.3 bar |
| Petrol flow rate | Biotech VZS-005 | ± 1% (of reading) |
| Methane flow rate | New-Flow TLF | ± 1% (F.S.) |
| Carbon monoxide | AVL Digas 4000 | 0.01% vol. |
| THC | AVL Digas 4000 | 1 ppm |
| NO | AVL Digas 4000 | 1 ppm |
| Calculated results | Uncertainty value | |
| Indicated specific energy consumption | ± 0.68 ÷ 0.79% | |