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Citroën C5 Aircross: soon a simple hybrid engine

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It is now known that the Stellantis Group is going to install a new Puretech engine in its vehicles, equipped with light hybridisation, i.e. non-rechargeable. This new engine, which will reduce fuel consumption and CO2 emissions, will be launched in the next few months on the various brands.

A more economical, simple hybrid offering

The new hybrid engine is therefore based on the extensively revised 1.2 Puretech engine, which uses a timing chain instead of the much-criticised belt. This engine will deliver 136 hp and 230 Nm of torque at 1,750 rpm, a level very close to that of the current 130 hp version. This new 1.2-litre engine is therefore linked to a chain and operates on the Miller cycle, which improves the thermal efficiency of combustion.

However, the most striking difference will be on the gearbox side, as the models equipped with this engine will abandon the EAT8 gearbox in favour of a brand new automatic gearbox developed by Stellantis and Punch PowerTrain. This new gearbox, called e-DSC6, will be a 6-speed dual-clutch gearbox with no torque split. It will incorporate a new 21 kW (28 hp) electric motor with 55 Nm of torque. This electric motor allows the vehicle to be driven 100% electrically when low torque is required and helps the combustion engine to limit its consumption. During deceleration, this motor acts as a generator to recharge the 48V battery of the hybrid system. It also provides the main start for the combustion engine with the help of the belt starter. The electric motor, the inverter and the computer are all housed in the e-DSC6 gearbox, which optimises both size and weight and ensures excellent driving performance.

A 48-volt battery

The 48V lithium-ion battery has a gross capacity of 898 Wh and an available capacity of 432 Wh. It is designed to maintain the same level of performance throughout the life of the car.

The 48V battery is installed under the left front seat, a configuration that offers many advantages over a rear-mounted battery:

- Completely preserve the living space,

- Retain the entire boot volume,

- Optimise the energy losses associated with the length of the cables,

- Preserve the driving sensation thanks to a good weight distribution (battery in the centre of the car).

This new 1.2 Puretech engine reduces fuel consumption by 15% and CO2 emissions by 126 g, limiting the ecological penalty to around €150 compared to €540 to €1,504 for a corresponding C5 Aircross. This new 1.2 Puretech engine, which will replace the 130 hp 1.2 currently available on the various Stellantis models, should be available on the Peugeot 3008 and 5008 during the second quarter, but will soon be available on the C5 Aircross, which should be equipped with it before the end of the first half of the year.

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