Nissan JUKE: new advanced powertrain offers efficiency and responsive performance

Nissan’s iconic compact crossover, the JUKE, now features an advanced hybrid powertrain, delivering efficient and responsive performance.

Nissan’s electrified product strategy is gaining momentum and the new JUKE Hybrid represents another milestone in our strategic ambition to have a fully electric range by 2023.” said Guillaume Cartier, president, Nissan AMIEO region.

The JUKE Hybrid has a true multimodal hybrid gearbox that prioritizes efficiency, responsiveness and harmonious handling. Drivers and passengers will appreciate the 100% electric start, engaging driveability and excellent fuel economy, efficient regenerative braking and powerful battery.

Central to the goal of the new hybrid powertrain was that it should complement JUKE’s already agile and dynamic personality, which has proved so popular with combustion engine customers. [ICE] version.

EV-like driving experience

Where traditional hybrids offer an uninspiring experience, the JUKE Hybrid’s intelligent drive system has been tuned to maximize the time JUKE spends in EV mode, which is what customers value most. A key goal of Nissan’s engineers was to reduce the frequency of turning the engine on and off, which drivers find inconvenient and disruptive. This increases driving pleasure and optimizes efficiency.

In the latest tests, up to 80 percent of a city drive was achieved in pure EV mode, with short hybrid phases to recharge the battery before returning to EV mode. Not only does the JUKE Hybrid start 100% in electric mode, it can reach speeds of up to 55 km/h in pure EV, so drivers can enjoy a strong, consistent, repeatable and sustainable EV driving experience.

The system automatically maximizes EV usage, but the JUKE Hybrid also features a dedicated EV mode switch that can be used as a function for when the driver doesn’t want the engine running, such as residential areas, around built-up areas such as schools, parking garages , through roads and in traffic jams. While the battery’s state of charge allows it, it forces the JUKE Hybrid to drive only electrically.

Efficient engine thanks to Alliance synergies

Going into the details of what makes the JUKE Hybrid’s powertrain so distinctive, the know-how contained within is testament to the Alliance’s combined engineering strengths.

JUKE’s hybrid powertrain consists of a new-generation, state-of-the-art internal combustion engine from Nissan specifically developed for use in a hybrid powertrain. It produces 69 kW (94 hp) and 148 Nm of torque.

On the electrical side, Nissan supplied the main electric motor producing 36 kW (49 hp) and 205 Nm of torque, while Renault supplied the 15 kW high voltage starter/generator, inverter and 1.2 kWh liquid-cooled battery, as well as the highly innovative gearbox.

The net result is a powertrain that delivers 25% more power than the current petrol engine option, with fuel savings of up to 40% in the urban cycle and up to 20% in the combined cycle. (Figures subject to homologation)

Smart multimodal gearbox

At the heart of the Nissan JUKE Hybrid’s driving pleasure is an advanced low-friction multimodal gearbox that makes the most of propulsion power, whether it be an electric motor, a petrol engine or both.

To reduce friction, this gearbox uses claw clutches instead of conventional synchro rings to shift the 4 “ICE” gears and 2 “EV” gears. In order to reduce friction, this gearbox also does not use a clutch. All vehicle starts are 100% electric and the 2 EV motors are used in combination to synchronize the gears for smooth, connected and responsive acceleration.

The gearbox is controlled by an advanced algorithm, which manages shift points, battery regeneration and the advanced series-parallel architecture. The powertrain can seamlessly navigate different hybridization requirements (series, parallel, series-parallel) based on acceleration and power requirements, all without driver intervention. As a result, there is no “rubber tire” feel, which is negatively perceived by customers of traditional hybrids, and the driver will enjoy responsive acceleration, tranquility, refined cruising and efficient low emissions – the best of all worlds.

Regenerative braking

When braking, the electric motor will act as a generator, capturing kinetic energy, converting it into electricity that is stored in the hybrid drive battery.

The advanced Regenerative Cooperative Braking function combines regenerative braking and traditional friction braking to achieve a natural pedal feel and efficient energy recovery. The driver will not be aware of the adjustments between the two systems, so feedback via the brake pedal remains constant and intuitive.

JUKE Hybrid also comes with a driving mode selector, which allows the driver to select Eco/Normal/Sport mode. The driving mode not only changes the steering effort, climate control and throttle response, in the case of the new hybrid powertrain, it also changes regenerative braking and battery charge status. For example, in Sport mode, regeneration is set to a high level during braking to maximize electrical power for effective acceleration. In Eco mode, it reduces the demand on the air conditioning system to maximize efficiency.

e-Pedal for seamless city driving

As with the LEAF pure EV, the JUKE Hybrid is equipped with Nissan’s e-Pedal Step system which, when activated, allows control of the car’s progress with the accelerator pedal. When the foot is removed from the accelerator, moderate regenerative braking is applied (up to 0.15 g) and the JUKE will slow down to creep speed (~5 km/h). Additional foot braking may sometimes be required to slow down, and is required to come to a complete stop (auto-hold function can be selected for convenience). Using e-Pedal quickly becomes intuitive and the effect is to reduce the driver’s workload while driving in the city, providing a smooth and relaxing driving experience, while maximizing the possibilities for hybrid battery regeneration, enhancing the EV experience is further improved.

External changes

The sporty crossover design of the JUKE coupé is retained on the new hybrid version. Great attention has been paid to every detail and a series of minor changes have been made to optimize aerodynamic efficiency – and to identify the JUKE Hybrid as the electrified version. Hybrid badges are fitted to the front doors and tailgate.

The JUKE Hybrid’s grille now features the new Nissan branding and also features a strip of glossy black material where it meets the bonnet, bringing it in line with other electrified Nissan models that share the same design motif.

The design of the grille itself is now mesh and has a smaller opening to optimize aero efficiency, made possible thanks to the reduced cooling requirements of the hybrid version. Changes have also been made to the body under the bumper to improve airflow and, unique to the hybrid, a radiator grille has been added, which allows the airflow to be automatically adjusted according to cooling needs, reducing drag as much as possible.

The rear spoiler, which is mounted above the rear window, has been re-profiled for cleaner airflow behind the car. And for the front wheels, the air guides have been reshaped and relocated to purify the airflow, while the rear axle has been given a cover that softens the airflow under the car. Taken together, these hard-to-recognise visual changes save approximately 2g of CO2 per 100km, reflecting Nissan’s commitment to efficiency improvements. The savings add up to 5g on some ICE versions.

To coincide with the JUKE Hybrid (also available on ICE versions), all-new 17-inch two-tone alloy wheels will be introduced, as well as Nissan Ariya two-tone 19-inch aero wheels for visual impact and efficiency.

Internal updates

In the cab, the right of the two dials shows speed and the left dial shows a power meter, with the needle moving between “charging”, when energy regeneration occurs, through “Eco” when propulsion is electric and “power” when the combustion engine and the electric motor are combined. In the lower part of the left dial is a meter that indicates the charge status of the battery.

A visual representation of the power flow can be displayed on the 7-inch combimeter screen between the two dials, showing all the different power flows in a simple and clear animation, giving the driver maximum understanding of the system’s operation.

The button for e-Pedal is located in the center console, behind the button for the electric parking brake, while the button to activate 100 percent EV mode is located between two of the center vents. When e-Pedal and EV mode are activated, visual reminders appear at the bottom of the combo meter screen.
Boot space is 354 litres, a slight decrease of 68 liters over the petrol version, due to the packaging of the 1.2kWh battery pack. With the rear seats folded, boot space remains best-in-class at 1237 litres, while rear knee room remains unchanged at 553 mm.

The introduction of the new JUKE Hybrid this summer will be another important addition to Nissan’s electric range. We are in the midst of an electrified product offensive that places as much emphasis on eco-efficiency as it is driving pleasure. Like all our electrified products, JUKE Hybrid is rewriting the rules in its segment thanks to bold innovation that delivers greater performance and greater efficiency.” said Arnaud Charpentier, Region Vice President, Product Strategy and Pricing, Nissan AMIEO region.

He added: “JUKE Hybrid customers will love that JUKE’s responsive, nimble personality has been further enhanced with the introduction of this advanced and refined electric powertrain. It offers more performance and impressive efficiency, without compromising on driving pleasure.

TECHNICAL SPECIFICATIONS

1.6-litre engine & e-motor

Current

horsepower (kW)

94 hp (69 kW) + 49 hp (36 kW)

Combined consumption*

l/100km

5.0 to 5.2

Combined emissions*

g/km

114 to 117

*Subject to homologation

SOURCE: Nissan

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