On the Citroen stand at the 2013 Geneva Motor Show, the brand will showcase a C3 Hybrid Air prototype fitted with the new Hybrid Air technology.
A full-hybrid solution combining a petrol engine, compressed air and hydraulic power, Hybrid Air delivers exceptional performance with fuel economy of less than 3 l/100.
The Citroen C3 Hybrid Air produces CO2 emissions of just 69g/km with fuel consumption reduced by a third to achieve a record-breaking 2.9 l/100km (81 mpg US or 97.4 mpg UK) over a combined cycle.
In urban driving, fuel consumption and CO2 are reduced by 45% compared with a vehicle solely fitted with the same internal combustion engine.
The C3 Hybrid Air will also feature a ?car scan? function that shows all the workings of the Hybrid Air technology.
Hybrid Air Technology
The unique Hybrid Air system was developed by PSA Peugeot Citroen in cooperation with the Bosch Group.
Hybrid Air combines proven sub-systems and technologies including a PureTech petrol engine, a compressed air energy storage unit, a hydraulic pump/motor unit and an automatic transmission with an epicyclic gear train. Eighty patents were filed by the PSA Peugeot Citroen Group during the development process.
An intelligent electronic management system manages input from the driver to optimize energy efficiency with three operating modes;
- Air power, with zero emissions
- Petrol power, using just the combustion engine
- Combined power, with the combustion engine and hydraulic motor working together
Hybrid Air combines all of the technologies, relying on the intelligent electronic management unit to switch continuously between the three operating modes. Optimizing energy efficiency in this way cuts fuel consumption and allows the system to recharge the energy storage unit with compressed air.
Active up to 43mph (70kph), Air Mode works in the same way as the ZEV mode on existing hybrid vehicles.
The combustion engine is not used. The energy stored (compressed air) is transmitted to the wheels via the hydraulic motor and gearbox. Depending on traffic, this mode will be active between 60 and 80% of urban driving time. Maximum use of deceleration and braking energy will ensure efficient recharging of the compressed air unit.
Petrol Mode transmits energy to the wheels without input from the compressed air unit. This mode is used primarily for journeys outside urban areas. Again, the energy from deceleration and braking is recovered for use when in Air Mode or for the boost function in Combined Mode.
Combined Mode, the combustion engine and hydraulic motor work together. This mode is used particularly during pick-up and strong acceleration, with a significant boost effect (total power of up to 90 kW) delivering performance comparable to that of an engine from the next market segment.
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