Peugeot Introducing Lower Power Variant of New 1.6 HDi FAP Diesel; Series of Euro5 Engines Arrive This Year

Following the introduction of the new 1.6-liter 82 kW (112 bhp) engine earlier this year on the 308 CC (earlier post), Peugeot will introduce in the second quarter of 2010 a lower-powered variant: the 1.6 liter HDi FAP 68 kW (92 bhp) in Peugeot ranges.

The new HDi FAP engines comply fully with the new Euro 5 standards and offer enhanced performance in terms of versatility and responsiveness and also in terms of acoustic comfort, while offering optimized fuel consumption and CO₂ emissions, with improvements of around 5 g/km compared to earlier versions.

These four-cylinder 1,560 cm³ engines require only eight valves, yet at the same time offer improved levels of driveability and environmental performance. For the 1.6 liter HDi FAP 82 kW (112 bhp), the maximum torque at 1,750 rpm increases from 240 to 270 N·m (199 lb-ft) (+ 12.5 %) while overboost rises from 260 to 285 N·m (210 lb-ft). Its maximum power is 82 kW (112 bhp) at 3,600 rpm (compared to 80 kW at 4000 rpm).

The new 1.6 liter HDi FAP 68 kW (92 bhp) for its part offers a maximum torque of 230 N·m (170 lb-ft) (compared to 215 N·m for the old engine block) at 1,750 rpm, with a maximum power of 68 kW (instead of 66 kW) at 4,000 rpm.

Compared with their predecessors, more than 50% of components in these new HDi FAP engines have been entirely redesigned. As in the new V6 3.0 liter HDi FAP and 2.0 liter HDi FAP Euro 5 engines that appeared in 2009, Peugeot is applying its Extreme Combustion Chamber System (ECCS) technology here. (Earlier post, earlier post.) This new-generation combustion chamber system offers:

• a lower compression ratio (16.0) benefiting performance and reducing emissions (including NO_x);

• an increase in the chamber diameter (+ 10 %), helping to reduce the quantity of incompletely burnt fuel as a result of less contact with the walls;

• a reduction of swirl (air movement in the combustion chamber) of nearly 10%, limiting heat loss against the walls.

This system is combined with a new common rail in which the injection pressure is now 1,650 and 1,700 bar respectively for the 1.6 liter HDi FAP 82 and 68 kW engines, as well as new 7-aperture injectors (instead of six previously)—piezoelectric for the 1.6 liter HDi FAP 82 kW, solenoid for the 1.6 liter HDi FAP 68 kW.

The engine control software has also been entirely redesigned to give this unit more complete injection patterns (up to five injections per cycle), improved operating quality and even better servicing diagnostics.

All of this helps improve the homogeneity of the air/diesel blend for maximum performance, reduced fuel consumption, a reduction at source of emissions and quieter combustion.

Each engine also uses a turbocharger (variable geometry for the 1.6 liter HDi 82 kW, fixed for the 1