Nissan updates diesel powered Juke with more torque and lesser emissions

Nissan has updated the diesel power unit in the Juke - yet retaining the overall power output at 108bhp, a century sprint timing of 11.2 seconds and a top speed of 175km/h. Torque output has increased from 240Nm to 260Nm with CO₂ emissions reduced to 109g/km from 124g/km. Combined fuel economy is rated at 28.6km/L.

The powertrain update is possible due to a host of technical changes and mechanical changes.

These include revised piezo-electric fuel injection nozzles, which now have a more precise spray pattern for better combustion and a new, more responsive turbocharger fed by a more direct - and more efficient - air intake path.

In addition, a closed-loop low-pressure exhaust gas recycling (EGR) system cools the exhaust gas before being re-introduced to the intake system - which aids the unit to be compatible with forthcoming Euro6 emission regulations.

The new diesel features low friction enhancements including diamond-like carbon (DLC) coatings for the tappets and Nissan's automatic Start/Stop system which restarts the engine within 0.5 second of the clutch being engaged. Reduced combustion noise further enhances the unit's overall refinement.

Changes have also been made to the gear ratios. The 1^st and 2^nd ratios are a little shorter to allow sharper responses at low speeds, while the remaining four ratios are slightly longer, taking advantage of the improved torque to deliver better fuel efficiency.

Fuel efficiency is aided by the use of the Nissan Dynamic Control system, which enables the driver to select from three engine settings - Eco, Normal and Sport. Pedal sensitivity settings in Eco and Sport modes on top of a 220Nm torque limitation in Eco mode aids fuel efficiency in the diesel powered Juke.