# How do we calculate the Ecoscore of PHEV?

These are the formulas to calculate the Ecoscore of PHEV petrol and diesel Euro 5 & 6 light duty vehicles (cars and vans):

PHEV petrol Euro 5 & 6:

• Ecoscore = 100*exp[-0.00357*(0,36*CO2 + 23,17*HC + 101,88*NOx + 0,011*CO + 1407,75*PM + 7,01*FCptr + 2,17*FCEV+ 0,333*dB(A) – 12,98)]

• Ecoscore Air Quality = 100*exp[-0.00357*2.5*(23,17*HC + 101,88*NOx + 0,011*CO + 1407,75*PM + 5,89*FCptr + 1,16*FCEV)]

PHEV diesel Euro 5:

• Ecoscore = 100*exp[-0.00357*(0,36*CO2 + 23,17*HC + 101,88*0,63*25/(25+RangeEV) + 0,011*CO + 1407,75*PM + 5,19*FCdsl + 2,17*FCEV+ 0,333*dB(A) – 12,86)]

• Ecoscore Air Quality = 100*exp[-0.00357*2.5*(23,17*HC + 101,88*0,5*25/(25+RangeEV)+ 0,011*CO + 1407,75*PM + 4,25*FCdsl + 1,16*FCEV)]

PHEV diesel Euro 6:

• Ecoscore = 100*exp[-0.00357*(0,36*CO2 + 23,17*HC + 101,88*0,5*25/(25+RangeEV) + 0,011*CO + 1407,75*PM + 5,19*FCdsl + 2,17*FCEV+ 0,333*dB(A) – 12,86)]

• Ecoscore Air Quality = 100*exp[-0.00357*2.5*(23,17*HC + 101,88*0,5*25/(25+RangeEV)+ 0,011*CO + 1407,75*PM + 4,25*FCdsl + 1,16*FCEV)]

Of which the following parameters are mentioned on the certificate of conformity:

CO2                        CO2 emission (combined) (g/km)

HC                          for petrol PHEV: HC emission (g/km)

for diesel PHEV: the difference between the HC+NOx and the NOx emissions (g/km)

NOx                       for petrol PHEV: NOx emission (g/km)

• Euro 5, this is 0.63 g/km

• Euro 6, this is 0.50 g/km

CO                         CO emission (g/km)

PM                         the particulate emissions (g/km)

FC(xxx)                   for PHEV: the weighted petrol or diesel consumption (combined cycle) in l/100km (FCptr resp. FCdsl) and the weighted (combined cycle) electricity consumption (FCEV) in kWh/100km

dB(A)                     the noise level (driving), expressed in dB(A)

RangeEV                the range (km) of the PHEV in electricity only mode

last database update: 12/05/2022 - next database update planned for: 15/07/2022