Description
Added on the 30/03/2023 09:44:14 - Copyright : Auto Moto EN
The purpose of this second round of testing in Sweden was to fine-tune all powertrain and chassis control systems. Thanks to their low-grip surfaces, the test areas sited on frozen lakes around Arjeplog were particularly well suited for delicately adjusting the drive torque control system in the BMW i5 under precisely reproducible conditions. In the new BMW i5, the DSC (Dynamic Stability Control) system, the near-actuator wheel slip limitation function and the drive torque control system are interlinked so that they can interact and complement each other flexibly in any driving situation. As a result, the all-electric sedan performs at least as proficiently as any conventionally powered model on ice and snow.The integrated application of all powertrain and chassis systems underpins the outstanding handling abilities displayed by the BMW i5 in winter testing. The more challenging the conditions, the more impressive were the speed and precision of the control systems in the fully electric version of the new BMW 5 Series Sedan. The BMW i5 serves up a harmonious blend of optimum traction when pulling away and supreme driving stability when cornering or braking, which is unique in the competitive environment.
This was followed by more testing over the course of 2022, both at other BMW Group test facilities and in everyday driving in and around Munich as well as in the vicinity of BMW Group Plant Dingolfing. The task here was to continue refining the car’s chassis technology and acoustic properties under a wide variety of conditions, as well as honing the drive unit’s power delivery, in order to produce a well-resolved driving experience at all times.Here again, part of the development work was deliberately carried out during the colder months on icy and snowy roads in the Alpine foothills. This last winter, BMW i5 prototypes – now sporting less camouflage and near-production headlights – were regularly sent out for testing to verify the functionality and reliability of their powertrain and chassis control systems in extremely demanding road and weather conditions. The BMW engineers involved in the vehicle project were able to directly inspect the current state of development through testing in the BMW brand’s native Bavaria before it was time to return to endurance testing near the Arctic Circle in February 2023.
This was followed by more testing over the course of 2022, both at other BMW Group test facilities and in everyday driving in and around Munich as well as in the vicinity of BMW Group Plant Dingolfing. The task here was to continue refining the car’s chassis technology and acoustic properties under a wide variety of conditions, as well as honing the drive unit’s power delivery, in order to produce a well-resolved driving experience at all times.Here again, part of the development work was deliberately carried out during the colder months on icy and snowy roads in the Alpine foothills. This last winter, BMW i5 prototypes – now sporting less camouflage and near-production headlights – were regularly sent out for testing to verify the functionality and reliability of their powertrain and chassis control systems in extremely demanding road and weather conditions. The BMW engineers involved in the vehicle project were able to directly inspect the current state of development through testing in the BMW brand’s native Bavaria before it was time to return to endurance testing near the Arctic Circle in February 2023.
The series production development process for the first-ever BMW i5 is entering the home straight with the fine-tuning of its suspension control and driver assistance systems. Just a few weeks ahead of the car’s world premiere, it is clear the all-electric version of the new BMW 5 Series Sedan will deliver an outstanding driving experience – just like all the other variants. Innovative Vertical Dynamics Management elevates the balance of sporting potency and ride comfort for which the BMW 5 Series has always been renowned to an even higher level. And the car’s automated driving capability has also been taken into a new dimension with the Highway Assistant, which controls the distance to the vehicle ahead, carries out steering adjustments and carries out lane changes for the first time by means of eye activation.Over the course of more than a year, the BMW i5 has negotiated a richly varied programme of testing – from the snow-covered and icy surfaces of the winter test centre at Arjeplog, Sweden to regions offering extreme heat and dry conditions, in city driving and on country roads, on motorways and hand-picked test tracks. The fine-tuning work for all the components involved in the driving experience was then carried out at the BMW Group’s proving grounds outside Miramas in southern France. This included ensuring the integral heating and cooling circuit with heat pump function for the drive system, the high-voltage battery and the interior of the BMW i5 can be controlled as required at all times. The predictive heat management capability of the high-voltage battery paves the way for rapid and efficient charging at DC fast-charging stations.
Before it can go into series production, the new edition of the sports sedan must first complete a programme of testing whose breadth and intensity far exceed the stresses and strains of everyday driving. There could be few greater contrasts with the hot-weather testing in the USA than what goes on at the BMW Group’s winter testing centre not far from the Arctic Circle. Arjeplog in Sweden offers the perfect conditions for a testing programme that eclipses anything day-to-day driving in central Europe, North America or Asia can throw at a car. However, Arjeplog doesn’t only give the prototypes the chance to demonstrate their imperviousness to extreme cold – it also provides the stage for the new model’s chassis controls systems to show off their full range of abilities. The closed-off expanses of ice offered by Lake Kakel and the “Mellanström-Runde”, one of the most popular test routes around Arjeplog, couldn’t be better suited for fine-tuning the DSC stability system and its myriad functions. Indeed, on this glassy surface you don’t need to drive quickly to provoke the control systems into action and therefore analyse their responses. All of which allows the link-up between DSC and the xDrive all-wheel-drive system and the interplay with the new BMW 3 Series Sedan’s M Sport differential to be refined down to the last detail under constant conditions.
|
Support : Technical 
- Content 
- Editors 
