|Nissan Juke n-tec. Click to enlarge.|
Nissan is introducing a new 1.5-liter dCi diesel engine in the Juke in Europe. The new 1.5L engine brings CO2 emissions down to 109 g/km from 124 g/km, with fuel consumption on the combined cycle of 4.2 l/100 km (56 mpg US)—an 11% reduction in consumption from the 4.72 l/100 km (49.8 mpg US) of the outgoing 1.5L unit.
The 108 hp (81 kW) diesel boosts maximum torque from 240 N·m to 260 N·m (192 lb-ft) at 1,750rpm, with 80% of this figure available from just 1,500 rpm to improve driveability. The new unit is now the most efficient engine in the Juke line-up, Nissan says.
Technical changes to the engine include revised piezo-electric fuel injection nozzles, which now have a more precise spray pattern for better combustion (with as much as 15% less unburnt fuel) and a new, more responsive, low-inertia variable geometry turbocharger fed by a more direct and more efficient air intake path.
In addition, a closed-loop low-pressure exhaust gas recycling (EGR) system has helped ensure the unit is compatible with forthcoming Euro6 emission regulations.
Other changes include a new thermostatically-controlled variable displacement oil pump which reduces internal friction by adapting automatically to the engine’s needs and oil viscosity.
The new diesel features low friction enhancements including diamond-like carbon (DLC) coatings for the tappets and now also features Nissan’s automatic Start/Stop system. The engine restarts within 0.5 seconds 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 1st and 2nd 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 also helped by the use of the Nissan Dynamic Control system, which enables the driver to select from three engine settings: Eco, Normal and Sport. This system now not only selects appropriate pedal sensitivity settings in Eco and Sport modes, but also limits maximum engine torque in Eco mode to 220 N·m (162 lb-ft). In Normal and Sport, the full 260 N·m is available.
The unit’s overall power output and performance figures (109 mph maximum speed, 0-62 mph in 11.2 seconds) are unchanged.
The new generation engine will be available across all Juke grades excluding the NISMO.
Nissan expects the best-selling model is expected to be the n-tec, which showcases new technology such as the latest Nissan Connect communication centre. As well as new navigation software and a 5.8-inch color touchscreen, the system incorporates advanced features such as Google Send-To-Car, which allows an owner to plan a journey on their PC or tablet at home or in the office and then send the instructions to the car ahead of the trip.
Since launch in the UK at the end of 2010, Nissan has sold more than 19,000 Jukes—around a third of all sales—powered by the older 1.5-liter dCi engine.