Division 5 FORMULAE FOR CALCULATING THE CO2 SAVINGS

The relative CO₂ reduction potential ΔCO₂(t) for different parking times shall be calculated using formula 5 with the following input data:

• decay constant of the eco-innovation vehicle without an engine compartment encapsulation (baseline vehicle): d_B [1/h]. This value shall be calculated with formula 1;

• decay constant of eco-innovation vehicle with an engine compartment encapsulation: d_E [1/h]. This value shall be calculated with formula 1;

• Hot Start Benefit: HSB. This value shall be calculated with formula 2;

• parking time distribution (share of vehicle stops): SVS. Table 2 (below) shall be used;

• CO₂ type-approval value: TA_CO2 [g CO₂/km], i.e. CO₂ mass emissions combined.

Formula 5: ${\mathrm{\Delta CO}}_2=\mathrm{1,443}\times \ln \left(\frac{e^{\left(-d_E\times t\right)}+1}{e^{\left(-d_B\times t\right)}+1}\right)\times \mathrm{HSB}$

The calculation results shall be given in the following Table 1:

The total CO₂ savings, weighted by the parking times (pt) shall be calculated using formula 6^f1.

Formula 6: $C_{{\mathrm{CO}}_2}={\mathrm{TA}}_{{\mathrm{CO}}_2}\times \sum _{\mathrm{pt}=1}^{24}{\mathrm{\Delta CO}}_2{\left(t\right)}_{\mathrm{pt}}\times {\mathrm{SVS}}_{\mathrm{pt}}$

Where the values for parking time [h] and SVS [%] shall be those in Table 2:

The CO₂ savings shall be the type-approval value (CO₂ mass emissions combined) multiplied by a factor of x^f2. The value of x is equal to the term $\sum {\mathrm{\Delta CO}}_2{\left(t\right)}_{\mathrm{pt}}\times {\mathrm{SVS}}_{\mathrm{pt}}$ of formula 6.

Where an existing vehicle type is equipped with the innovative technology the following formula shall be used:

Formula 7: $C_{{\mathrm{CO}}_2}={\mathrm{x\; *\; TA}}_{{\mathrm{CO}}_2\mathrm{baseline\; vehicle}}$

with:

C_CO2

CO₂ savings [g CO₂/km]

TA_{CO2 baseline vehicle}

type-approval value of the eco-innovation vehicle without an engine compartment encapsulation [g CO₂/km]

Where the innovative technology is installed on a new vehicle type and the type-approval CO₂ value has been determined with the innovative technology installed, the following formula for calculating the CO₂ savings shall be used:

Formula 8: $C_{{\mathrm{CO}}_2}=x∕\left(1-x\right){\mathrm{*TA}}_{{\mathrm{CO}}_2\mathrm{new\; vehicle\; type}}$

with:

C_CO2

CO₂ savings [g CO₂/km]

TA_{CO2 new vehicle type}

type-approval value of the new vehicle type equipped with the innovative technology [g CO₂/km]