Lexus has drawn on more than 15 years of hybrid electric technology expertise to produce its first plug-in hybrid electric vehicle (PHEV), the new NX 450h+. The halo model in the new NX range, it features a four-cylinder 2.5-litre hybrid engine and a rechargeable 18.1kWh lithium-ion battery – the highest capacity in its class. An additional rear electric motor enables all-wheel drive.
The plug-in system produces 302bhp and is expected to give 0-62mph acceleration in a little more than six seconds. Estimated CO2 emissions (WLTP combined cycle) of less than 40g/km and fuel economy better than 94mpg are set to be class-leading. The battery’s size and capacity and Lexus’s electrified efficiency know-how deliver a best-in-class EV range of 40* miles and enable all-electric, zero-emission driving at speeds up to 84mph.
Crucially, the system maintains high efficiency even when the battery is depleted. In many competitor models, operation defaults to an internal combustion engine, but in the NX 450h+ the switch is to an efficient self-charging hybrid system. In these circumstances, the NX’s efficiency is expected to be as much as 20 per cent greater than its rivals.
The new hybrid electric NX 350h uses fourth generation Lexus hybrid technology. Power is greater by 22 per cent compared to the current model, taking output to 239bhp and improving 0-62 acceleration by 15 per cent to 7.7 seconds. At the same time, CO2 emissions are expected to fall by around 10 per cent. The model will be available with front and all-wheel drive, both with a 1.5-tonne towing capacity.
In a first for Lexus, the new plug-in hybrid vehicle (PHEV) system brings Lexus Electrified to life through performance and the signature quietness of a PHEV model. The NX 450h+ has a manufacturer-estimated 36-mile range on electric power only, made possible by the newly developed, high-capacity lithium ion battery. The system achieves the EV output equivalent to a 2.0-liter engine. When combined with the newly developed hybrid transaxle, a 2.5-liter inline 4-cylinder engine delivers on the performance luxury guests are seeking with an estimated 6.0 second 0-60 time.
A high-output, high-efficiency system designed to reduce power loss when converting from AC power to DC power, results in shorter charging times. Using the maximum charging current of 240V, the Lexus NX plug-in hybrid can be fully charged in approximately two-and a-half hours when equipped with the optional 6.6 kW Expedited Onboard Charger. With the standard 3.3 kW on board charger, charge time goes up slightly to four-and-a-half hours.
The NX450h+ employs an electronically controlled, full-time AWD system for a confident, sporty driving experience. Optimizing front and rear torque distribution according to the driving conditions, the driver can control the vehicle as intended. In turns, the NX AWD provides exhilarating yet elegant control for normal to aggressive driving styles.
Predictive Efficient Drive couples with the navigation system, learns driving habits, predicts the expected roadway ahead and analyzes real-time traffic reports to optimize charging and discharging of the hybrid battery. The more miles the NX is driven, the more data is gathered to help optimize fuel consumption. The system also uses accumulated knowledge about a driver’s behavior to predict when and where the vehicle is likely to slow down or stop. For example, when the NX approaches a location where the driver has slowed or stopped in the past, and the driver releases the accelerator pedal, Predictive Efficient Drive increases regenerative braking, allowing more efficient energy to be recovered and recharged into the hybrid battery.
Source: Lexus
Video © Lexus
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