While more than 4 million vehicles run on CNG in the world, only 3.000 circulate in France. With high oil prices and the targets set by the Kyoto Protocol, France has recently set a goal to 100.000 2010 vehicle.
In a context where transport is 30% of the energy consumption of a French and 27% of its emissions of greenhouse gases, the Green Paper of the European Commission underlines the importance of promoting a progressive growth in other energy and fixed sources such as the replacement goal by 2020, 20% of conventional fuels with alternative fuels.
A car on natural gas is a standard gasoline vehicle, modified by the manufacturer of origin, simply equipped with one or more tanks, a gauge and an additional engine supply system for natural gas. The cars currently on the market are called bi-fuel vehicles gas / petrol, since running both energies. With its natural gas reservoir, a bi-fuel vehicle can travel on average 300 km longer than a conventional vehicle. Indeed, autonomy natural gas (in 200 500 km depending on model) is added that related to the gas tank of the content remains generally unchanged. The vehicle runs primarily natural gas and switching to gas is made automatically when the gas tank is empty.