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PressClub United Kingdom · Article.

Endurance test at the North Cape: The BMW iX undergoes final winter testing.

BMW Group’s new technology flagship completes an intense tuning programme for drive and suspension systems – electric motors, four-wheel drive, charging technology, high-voltage batteries and heat management complete stress test in extremely cold conditions.

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Munich. A year prior to market launch, the series development process for the BMW iX is forging ahead as scheduled. Following the presentation of the final design of the BMW iX at the #NEXTGen 2020 in Munich, prototypes of the new technology flagship are now ready for final winter testing north of Scandinavia. The endurance test, which is being held under extreme weather conditions beyond the Arctic Circle, serves, among other things, the fine tuning of drive and suspension systems. Moreover, the electric motors, four-wheel drive system as well as charging technology, high-voltage batteries and heat management are put to the demanding acid test under sub-zero temperatures.

The tuning and test drives take the prototypes of the BMW iX as far as Europe’s most northerly regions. On deserted roads in Finnish Lapland and to the North Cape on the Norwegian island of Magerøya, both the fifth-generation BMW eDrive technology and the suspension control systems have to prove their functionality and reliability in particularly demanding road and weather conditions. In the process, test engineers evaluate above all the interaction between drive and suspensions systems on road surfaces with a low friction coefficient. Unsecured tracks, icy roads and ice surfaces especially prepared for test-driving on the edge of the Arctic Circle offer the ideal conditions to precisely coordinate the motor control technology, the electric four-wheel drive and suspension control systems right up to the limits of longitudinal and lateral vehicle dynamics.

The BMW iX is the first model based on a new, modular and scalable future BMW Group construction concept. It was conceived from the outset for purely electric mobility, and with the latest development stage of BMW eDrive Technology, intelligent lightweight construction and optimized aerodynamic characteristics it sets new benchmarks in efficiency within the competitive environment of the luxury Sports Activity Vehicle (SAV). Two electric motors together generate a maximum power output of more than 370 kW/500 hp according to current calculations. An integral part of the endurance test at the North Cape is also the final tuning of the intelligent four-wheel drive system BMW xDrive and adaptive adjustment of the axle-specific yaw moment, which in addition to stability and traction also constantly optimizes the BMW iX’s efficiency. The aim of the development is to achieve an extremely low combined power consumption of less than 21 kWh per 100 kilometres in the WLTP test cycle and a range of more than 600 kilometres, likewise according to WLTP, values which are untypical of this class.

During the winter test, the components of BMW eDrive Technology are faced with very special challenges. The high-voltage batteries and the charging technology undergo in extremely low outdoor temperatures field testing for everyday use in the deep of winter. Likewise, displays informing of charge level, range and operating status as well as the heat management system, which constantly ensures the optimum operation temperature of the drive system and high-voltage batteries, demonstrate their resistance to extreme sub-zero temperatures. 

Within the shortest time, the challenging test programme demands more from the BMW iX prototypes than the future production models have to withstand during their entire life cycle. The evaluation of all test results and the resultant fine tuning of all drive and suspension components of the BMW iX will pave the way during the coming months for the launch of a new era of driving pleasure.

CO2 EMISSIONS & CONSUMPTION.

BMW iX:
Combined power consumption: < 21 kWh/100km in the WLTP test cycle*; CO2 emissions combined: 0 g/km.
* Data on driving performance, energy consumption and range are preliminary and based on forecasts.

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CO2 emission information.

The values for fuel consumption, CO2 emissions and energy consumption shown were determined in a standardised test cycle according to the European Regulation (EC) 715/2007 in the version currently applicable. The figures refer to a vehicle with basic configuration in Germany and the range shown considers transmission (automatic or manual) and the different wheels and tyres available on the selected model and may vary during the configuration.

The values of the vehicles labelled with (*), are already based on the test cycle according to the new WLTP regulation and are translated back into NEDC-equivalent values in order to allow a comparison between vehicles. More information on the transition from NEDC to WLTP test procedures can be found here.

These figures are intended for comparison purposes and may not be representative of what a user achieves under usual driving conditions. For plug-in hybrid vehicles and battery electric vehicles the figures have been obtained using a combination of battery power and petrol fuel after the battery had been fully charged. Plug-in hybrid vehicles and battery electric vehicles require mains electricity for charging. The CO2 emissions labels are determined according to Directive 1999/94/EC and the Passenger Car (Fuel consumption and CO2 Emissions Information) Regulations 2001, as amended. They are based on the fuel consumption, CO2 values and energy consumptions according to the NEDC cycle.

A guide on fuel economy and CO2 emissions which contains data for all new passenger car models is available at any point of sale free of charge. For further information you can also visit this link.

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