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Table 2 Accuracy of measurements and uncertainty of computed results
From: Study and the effects of ignition timing on gasoline engine performance and emissions
Measurements | Accuracy |
|---|---|
Soot density | ±1 mg/m3 |
NOx | ±5 ppm |
CO | ±3 ppm |
HC | ±2 ppm |
Time | ±0.5 % |
Speed | ±2 rpm |
Torque | ±0.1 N m |
Computed results Uncertainty | |
Fuel volumetric rate | ±1 % |
Power | ±1 % |
Specific fuel consumption | ±1.5 % |
Efficiency | ±1.5 % |