Commission Delegated Regulation (EU) No 134/2014Show full title

1.4.4. In these formulae:

FC

=

the fuel consumption in litres per 100 km in the case of petrol, ethanol, LPG, diesel or biodiesel, in m³ per 100 km in the case of natural gas and H₂NG or in kg per 100 km in the case of hydrogen.

HC

=

the measured emission of hydrocarbons in mg/km

CO

=

the measured emission of carbon monoxide in mg/km

CO₂

=

the measured emission of carbon dioxide in g/km

H₂O

=

the measured emission of water (H₂O) in g/km

H₂

=

the measured emission of hydrogen (H₂₎ in g/km

A

=

the quantity of NG/biomethane in the H₂NG mixture, expressed in percent by volume

D

=

the density of the test fuel.

In the case of gaseous fuels, D is the density at 15 °C and at 101,3 kPa ambient pressure:

d

=

theoretical distance covered by a vehicle tested under the type I test in km

p₁

=

pressure in gaseous fuel tank before the operating cycle in Pa

p₂

=

pressure in gaseous fuel tank after the operating cycle in Pa

T₁

=

temperature in gaseous fuel tank before the operating cycle in K

T₂

=

temperature in gaseous fuel tank after the operating cycle in K

Z₁

=

compressibility factor of the gaseous fuel at p₁ and T₁

Z₂

=

compressibility factor of the gaseous fuel at p₂ and T₂

V

=

inner volume of the gaseous fuel tank in m³

The compressibility factor shall be obtained from the following table:

Table Ap1-1
Compressibility factor Zx of the gaseous fuel
T(k) \ p(bar)	5	100	200	300	400	500	600	700	800	900
33	0,8589	10,508	18,854	26,477	33,652	40,509	47,119	53,519	59,73	65,759
53	0,9651	0,9221	14,158	18,906	23,384	27,646	31,739	35,697	39,541	43,287
73	0,9888	0,9911	12,779	16,038	19,225	22,292	25,247	28,104	30,877	33,577
93	0,997	10,422	12,334	14,696	17,107	19,472	21,771	24,003	26,172	28,286
113	10,004	10,659	12,131	13,951	15,86	17,764	19,633	21,458	23,239	24,978
133	10,019	10,757	11,99	13,471	15,039	16,623	18,19	19,73	21,238	22,714
153	10,026	10,788	11,868	13,123	14,453	15,804	17,15	18,479	19,785	21,067
173	10,029	10,785	11,757	12,851	14,006	15,183	16,361	17,528	18,679	19,811
193	10,03	10,765	11,653	12,628	13,651	14,693	15,739	16,779	17,807	18,82
213	10,028	10,705	11,468	12,276	13,111	13,962	14,817	15,669	16,515	17,352
233	10,035	10,712	11,475	12,282	13,118	13,968	14,823	15,675	16,521	17,358
248	10,034	10,687	11,413	12,173	12,956	13,752	14,552	15,35	16,143	16,929
263	10,033	10,663	11,355	12,073	12,811	13,559	14,311	15,062	15,808	16,548
278	10,032	10,64	11,3	11,982	12,679	13,385	14,094	14,803	15,508	16,207
293	10,031	10,617	11,249	11,897	12,558	13,227	13,899	14,57	15,237	15,9
308	10,03	10,595	11,201	11,819	12,448	13,083	13,721	14,358	14,992	15,623
323	10,029	10,574	11,156	11,747	12,347	12,952	13,559	14,165	14,769	15,37
338	10,028	10,554	11,113	11,68	12,253	12,83	13,41	13,988	14,565	15,138
353	10,027	10,535	11,073	11,617	12,166	12,718	13,272	13,826	14,377	14,926