The latest 1.5-litre dCi diesel engine that powers the Nissan Juke now boasts of more torque, lower carbon dioxide emissions, improved fuel economy and lesser noise. The engine has powered over 19,000 Jukes, accounting for a third of total sales since the model was launched in the United Kingdom in 2010.
The latest version of 1.5-litre dCi diesel engine now boasts of increased maximum torque from 240Nm to 260Nm at 1,750rpm, with around 80 percent available from just 1,500rpm. It also features carbon dioxide emissions of just 109g/km and a combined fuel economy of 67.3 mpg.
Nissan was able to endow the engine with these attributes through a number of technical modifications. The 1.5-litre dCi diesel engine now features revised piezo-electric fuel injection nozzles, which more precise spray pattern allows for better combustion, with as much 15 percent less un-burnt fuel.
The engine is also equipped with a more responsive, low-inertia variable geometry turbocharger fed by more direct and more efficient air intake path.
The engine also features a closed-loop low-pressure exhaust gas recycling (EGR) system, which cools the exhaust gas before re-introducing it to the intake system, thereby helping ensure that the powerplant could comply with incoming Euro6 emission regulations.
The latest 1.5-litre dCi diesel engine also boasts of a new thermostatically controlled variable displacement oil pump that trims internal friction by adapting automatically to the engine’s needs and oil viscosity.
The engine also features friction improvement like diamond-like carbon (DLC) coatings for the tappets. The engine is also equipped with Nissan’s automatic Start/Stop system, which enables engine restarts within 0.5 seconds of the clutch being engaged.