Citroën cuts fuel consumption on models with 1.6L HDi, optimizes DS5 Hybrid4

Citroën has cut fuel consumption and greenhouse gas emissions of several of its models including models using the 1.6 liter HDi engine, which now emits around 5g less CO₂ per km. At the same time, Citroën has optimized the DS5 Hybrid4. This model, which accounts for 22.5% of sales of the DS5 range, now emits 91g of CO₂per km.

1.6L HDi. With the changes to the 1.6L HDi, the combined-cycle consumption of the C3 and the DS3 e-HDi 90 with a manual gearbox has dropped to 3.5 l/100 km (67.2 mpg US) with just 91 g/km of CO₂ emissions, and the C4 Picasso e-HDi 110 with a clutchless gearbox and 16" wheels now consumes 4.6 l/100 km (51.1 mpg US) and emits 120 g of CO₂ per km.

These engines, which are produced on the Trémery site in France, were improved by making a number of changes, including:

• A new-generation oil pump with a variable flow that limits the loads on the engine to the strict necessary.
• New low-viscosity engine and gearbox oils that reduce mechanical losses due to friction.
• New gaskets for the crankshaft which cut tightening loads and, therefore, friction.
• A new alternator belt pulley, which allows for a slacker belt, thereby reducing the driving force.
• A new low-friction vacuum pump that limits losses of energy. In the months to come, other models in the range will benefit from these developments.

Optimized DS5 Hybrid4. The DS5 Hybrid4 now features a new management strategy of the hybrid-diesel system. The main enhancements include the optimization of energy recovery when decelerating and braking and a new battery management system.

With these improvements, the DS5 Hybrid4 now consumes 3.5 l/100 km (67.2 mpg US) (17" wheels) or 3.9 l/100 km (60.3 mpg US) (18" and 19" wheels) in a combined cycle. These fuel consumption figures correspond to CO₂ emissions of 91 and 102 g/km respectively.