From: Numerical simulation of a diesel engine performance powered by soybean biodiesel and diesel fuels
Measured parameter | Accuracy | Relative error (%) |
---|---|---|
Engine brake power | Â | 3.96 |
 Torque |  ± 2% | 2 |
 Speed |  ± 2% | 2 |
In-cylinder pressure | Â | 4.92 |
 Piezoelectric pressure sensor |  ± 2% | 2 |
 Charge amplifier |  ± 1% | 1 |
 Digitizing oscilloscope |  ± 2% | 2 |
Air flow rate |  ± 0.2 mm H2O | 1.64 |
Diesel fuel flow rate |  ± 8.27 × 10–3 kg/h | 1.51 |
Thermocouple |  ± 0.55 °C | 1.57 |
Crankshaft position | Â | 3.9 |
 Magnetic pickup |  ± 1% | 1 |
 Wave shaper |  ± 1% | 1 |
NO |  ± 5 ppm | 5.88 |
CO |  ± 1% | 3.28 |
CO2 |  ± 1% | 3.57 |
HC |  ± 3 ppm | 3.08 |