Table 3 The precision and uncertainty of the instruments.

From: Synergistic optimization of combustion chamber design and hydrogen injection strategies for ultra-lean combustion in hydrogen engines

Equipment

Precision

Uncertainty

Dynamometer

Torque: <±0.1 N∙m

Speed: <±1 rpm

0.07

2

Hydrogen flow meter

< ±0.3%

0.02

Pressure sensor

<±0.3%

0.4

Angle marker

< ±0.5°

0.09

Exhaust gas analyzer

< ±1%

0.8

Lambda meter

< ±0.01

1

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