Michelin tyres specifically designed for the Citroën Hybrid Air
Combining a hybrid powertrain - petrol and compressed air - the Hybrid Air prototype developed by PSA Peugeot Citroën consumes less than 3l of fuel per 100 km and only emits 69g per km of CO2. The “Tall & Narrow” tyres, supplied by Michelin, make a significant contribution to this performance.
Based on the Citroën C3, the Hybrid Air is not particularly exciting to look at. Yet, its engine uses a unique process combining petrol and compressed air to offer a significant reduction in fuel consumption (2.9 l/100 km) and CO2 emissions (69 g/km). These values are benchmarked against a standard Citroën C3 at the same power, which uses 4.5 l/100 km and emits104 g of CO2.
This represents a fuel saving of 1.6 l /100 km and CO2 emissions are 35g lower.
To achieve this level of energy efficiency, PSA Peugeot-Citroën asked Michelin to specifically design a tyre. Meeting the specifications was no easy task, since superior performances were required for rolling resistance, safety, comfort and mileage.
Michelin engineers therefore proposed a tyre with unusual dimensions: 65/50 R 18, i.e. A narrow tyre with a large diameter (Tall & Narrow technology), to strike a balance between these conflicting performances. This type of tyre was presented at the Michelin Challenge Bibendum in 2011.
Furthermore, Michelin research teams have reduced the tyre weight, achieving a reduction of almost 7 kg for the whole vehicle.
In total, the tyre designed by Michelin saves 0.18 litres of fuel per 100 km and 4.3 g of CO2 per kilometre.
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