Division 5.9 General requirements for the on-board measurementsF1

United Kingdom

All data shall be recorded at least in 2 Hz frequency or at recommended frequency from the equipment maker, whichever is the higher value.

The input data for the simulation tool may be composed from different recorders. The following input data shall be provided from measurements:

(a)

torque at the driven wheels per wheel;
(b)

rotational speed at the driven wheels per wheel;
(c)

gear (optional);
(d)

engine speed;
(e)

fan speed;
(f)

vehicle speed;
(g)

fuel flow.

The torque and rotational speed at the wheels shall be recorded in one data-logging system. If different data-logging systems are used for the other signals, one common signal, such as vehicle speed, shall be recorded to ensure correct time alignment of the signals.

The accuracy requirements set out in Table 2 shall be met by all measurement equipment used. Any equipment not listed in Table 2 shall fulfil the accuracy requirements set out in Table 2 of Annex V.

Table 2

Requirements of measurement systems

Measurement system	Accuracy	Rise time ^f1
Rise time means the difference in time between the 10 percent and 90 percent response of the final analyser reading (t90 – t10).
The accuracy shall be met for the integral fuel flow over 100 minutes.
Balance for vehicle weight	50 kg or < 0,5 % of max. calibration whichever is smaller	—
Rotational speed wheels	< 0,5 % of max. calibration	≤ 1 s
Fuel mass flow for liquid fuels	< 1,0 % of reading or < 0,5 % of max. calibration whichever is larger	≤ 2 s
Fuel volume measurement system ^f2	< 1,0 % of reading or < 0,5 % of max. calibration whichever is larger	≤ 2 s
Temperature of the fuel	± 1 °C	≤ 2 s
Sensor for measuring the rotational speed cooling fan	0,4 % of reading or 0,2 % of max. calibration of speed whichever is larger	≤ 1 s
Engine speed	As set out in Annex V
Wheel torque	For 10 kNm calibration: < 40 Nm accuracy < 20 Nm crosstalk	< 0,1 s

The maximum calibration values shall be at least 1,1 times the maximum predicted value expected during all test runs for the respective measurement system. For the torque measurement system the maximum calibration may be limited to 10 kNm.

Accuracy given shall be met by the sum of all single accuracies in the case more than one scale is used.

Annotations

Textual amendments

F1: Inserted by Commission Regulation (EU) 2019/318 of 19 February 2019 amending Regulation (EU) 2017/2400 and Directive 2007/46/EC of the European Parliament and of the Council as regards the determination of the CO2 emissions and fuel consumption of heavy-duty vehicles (Text with EEA relevance).

Footnotes

f1: Rise time means the difference in time between the 10 percent and 90 percent response of the final analyser reading (t90 – t10).
f2: The accuracy shall be met for the integral fuel flow over 100 minutes.