An ideal basis for planning: Range display in Audi electric cars gives a reliable picture

Whether you’re driving around the corner, commuting to work or going on holiday: when you’re on the road with an electric car, reliable range indications form the basis for planning all your mobility needs. Legal test cycles as the basis for range indication can only serve as a general guideline for planning, as range is influenced in practice by many parameters. In addition to external factors such as traffic jams, route topography or outside temperatures, driver-specific influences such as individual driving style or the use of comfort functions also play an important role. The remaining range display in Audi’s all-electric e-tron models passes this test with flying colors by taking into account all relevant parameters and providing a realistic picture. In addition, the route planner ensures that any charging stops on the journey are optimally planned in the route. Route planning can be set from the car or before departure using the handy myAudi app.

“We always want to give our customers a fair indication of the remaining range that they can easily achieve by driving in their own style. That’s why our smart calculation system takes all eventualities into account – whether summer time and bumper-to-bumper holiday traffic or winter weather and the demands of increased heating. Reliability and honesty in the field of range are the most important conditions for dispelling doubts about e-mobility and lastingly alleviating range anxiety. This is the approach our remaining range is taking, so drivers can rest assured that they will reach their destination as planned,” said Audi Head of Product Marketing Christiane Zorn.

Consumption history, outside temperature and other parameters ensure a realistic calculation

Predictive, reliable and dynamic: Audi e-tron models offer drivers the choice between two different range calculation options, one with and one without the route planner as part of the Audi Multi Media Interface (Audi MMI). Without the technical support of the navigation system and the route planner, the calculation of the remaining range is based on recent consumption values. The system also reflects driver-specific characteristics, such as a particularly sporty or economical driving style. Isolated special factors, such as energy-intensive passing maneuvers, are reliably averaged and ensure a realistic calculation.

In addition to consumption data from the drive and on-board power systems, the car’s distribution point and the electrical nervous system, the calculation of the remaining range also takes into account heat management data (heating or AC) or the use of additional comfort functions such as seat or steering wheel heating. The selected driving mode, individual vehicle configuration, load and climatic conditions are also taken into account. In this way, the range display shows the most recent consumption data and projects it into the future, without additional data from the route planner.

Smart algorithms recognize the difference between relaxed driving in the countryside and winding roads

For route-based range calculation, the recent consumption data is supplemented with additional data from the route planner, which is available in all e-tron models. This means that the system takes into account the topography along the planned route and divides the planned route into sections for calculation purposes. Each leg of the route is then assigned an expected driving speed. This fine division into small sections allows a very accurate calculation. Other parameters used include the probability of an open highway along the route and expected congestion. City traffic, traffic jams, traffic jams, speed limits and through roads all directly affect the calculation. Unlike retrospective range representation, route-based calculations can differentiate from the moment a journey begins, whether it be a leisurely ride on country roads averaging 80 km/h and summer temperatures or a journey to your next ski vacation on highways and winding roads in an icy environment with the heat on full blast.

No external data connection: calculation takes milliseconds in the vehicle

Highlights of the data analysis include dynamic residual range adjustment, taking into account external and vehicle-related factors. External factors include real-time congestion data, which is continuously collected and directly reflected in the calculation.

Examples of vehicle-related factors are changes in user behavior related to comfort functions or sudden changes in driving behaviour. For example, if the heating or air conditioning is switched on or off, the remaining range is immediately recalculated, often resulting in visible adjustments to the range display. This allows drivers to see at a glance how their behavior influences the range. Since the computing power of the Audi e-tron models is located directly in the vehicle, the data calculation only takes a few milliseconds. This eliminates the need for a connection to an external data processor. As a result, the system functions autonomously and is not dependent on sufficient mobile data coverage.

The Audi e-tron route planner is a new software development that was first used in all-electric models in the MIB 2+ generation of the modular infotainment toolkit. Since 2020, the third generation of the modular infotainment toolkit (MIB 3) has given the e-tron route planner even more functionality with ten times the processing power. The daily usability of the advanced route planner is further enhanced by a new algorithm: daily updated data on charging points and alternative routes, both optimized for the requirements of e-vehicles, provide drivers with better support. Examples of data updated daily are detailed information such as payment and authentication options, precise operator data and any access restrictions.

Time-optimized route planning promotes high-power charging

When looking for suitable charging points along the route, Audi ensures that there is always a reliable basis for planning with the route planner. In order to guarantee the shortest possible travel time, only as many charging stops are suggested as are necessary to reach the destination safely. If the route or consumption changes, for example due to unforeseen traffic jams or the use or deactivation of comfort functions, any or necessary charging stops are also adjusted. For example, two short stops to charge at a charging station with powerful charging points can save time compared to one long charging stop at a charging station with charging points with lower power. Alternative routes with a better charging infrastructure are also included in the calculation of the ideal total travel time. The Audi e-tron route planner prefers HPC charging stations (high power charging).

SOURCE: Audi

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