Volvo B4184S8 Flexifuel Engine for the S40 and V50 pdf
The FlexiFuel engine is a 1.8 litre engine adapted for E85 fuel. E85 consists of a mixture of 85 % ethanol and 15 % 95-octane petrol. However, the Engine Control Module (ECM) can also adapt all fuel mixtures from 100 % petrol to just E85. The FlexiFuel engine is basically a B4184S11 which has been modified to cope with the major stresses that operating with E85 entails.
FlexiFuel and the environment
Operating with E85 is considered carbon dioxide neutral. This means that the same quantity of carbon dioxide released during combustion is reabsorbed and bound by vegetation and plants. In this way a type of cycle is formed. Fossil fuels (such as petrol and diesel) only add carbon dioxide as there is no organic material that binds the carbon dioxide. Fuel consumption with E85 increases by between 35-40 % because E85 has a lower energy content than normal petrol.
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