Introduction

With Live-Inspection you can see your car's drivetrain at work in real-time and in 3D! Through data acquisition from multiple ECU's in your car, we generate a live animation, showcasing the power flow from you engine to each wheel. This way you cannot only see the actual data in numbers, but also get a better understanding of whats happening in your drivetrain in real-time!

How to access Live-Inspection

To access the Live-Inspection, open your car on the main page and click on "Diagnostics" on the top right of the screen. From the Misc. menu, select "Live Inspections" while connected to your car.

Open

Car braking, no torque sent to the front

Open

Car accelerating, torque sent to the front

Using Live-Inspection

As soon as Live-Inspection is started data will be read and displayed from various ECU's in your car. You can use Live-Inspection in vertical or landscape mode on Smartphones and Tablets. By clicking "Live-Data" at the bottom of the screen you can bring up further data and can choose to filter for
- Engine
- Transmission
- xDrive System

The filterd view can also be accessed by directly clicking on the respective components in the Live-Inspecion animation.

Temperature Measurement

All components will show their current temperature range directly in the animation. During warmup your engine, transmission and xDrive system will be rendered in blueish colors and slowly turn to green, once they reach operating temperature. Overheated components will be shown in orange and finally in red, when above a dangerous threshold. You will notice, each component needs a different time for warming up. Usually your transmission is the slowest to warmup. Clicking on the component in the animation will bring up the actual temperature value, along with other live-data.

xDrive System

Live-Inspections reads all important health data from your xDrive System and helps to see and understand how your car manages torque to the front and rear axle in various situations.

Torque Front/Torque Rear

Those values show the current torque split between your front and rear axle. You will notice, that your car is constantly managing torque between the front and the rear and also depending on drive mode. Power distribution in "Comfort" is very different to "Sport+". (G-Series cars) The split torque is defined by the current engine torque, the current gear and the current force of your xDrive clutch. In xDrive cars with a longitudinally mounted engine, the rear axle is always driven while the front axle is controlled by the xDrive system. When the clutch is open, the front split is always 0%, while the rear axle receives 100% of the torque. When the clutch is fully closed, the split is 50/50 in most situations.

Clutch Torque

Shows the current torque your xDrive System is sending to your front wheels. The clutch torque is a calculated value, derived from the current clutch angle (see below). Usually this value is identical to the torque transmitted to your front wheels, but the actual torque at your front wheels can be lower as well. For instance, when the xDrive clutch is closed, but the engine does not send any torque to the drivetrain right now.

Clutch Stress Actual

As soon as there is a relative movement between the Front and Rear wheels, slip occurs within the clutch pack. This slip is converted into heat and wear. The xDrive ECU calculates the resulting clutch- temperatures and converts this into a maximum percentage of the permissible temperature. As a rule of thumb, you should not exceed 50% thermal load for extended periods.
When relative movement between the front and rear wheels occurs, slip occurs within the clutch pack. This slip is converted into heat and wear. The xDrive ECU calculates the resulting clutch temperatures and converts them into a maximum percentage of the permissible temperature. As a rule of thumb, the thermal load should not exceed 50% for long periods.

Axle Speed Difference

The delta in RPM (Revolutions per Minute) between your front and rear axle. Usually this value is close to 0, but will start to deviate for instance when cornering or when your rear wheels start to spin. Differences will also show with staggered wheel setups. In RWD mode this will not cause any wear and tear, while this will induce wear in any AWD mode.

Temperature Clutch

The calculated temperature inside the clutch pack. This value rises rapidly during slippage and high loads. When a certain threshold is reached, the xDrive system temporarily shuts down until the value has returned to a safe range. In the animated Live-Inspection screen your xDrive component will also turn from green to orange or red, when the temperature are above certain thresholds.

Angle Actual

This is the actual angle of the stepper motor inside the transfer case. The greater the angle, the harder the clutch is pressed and the more torque can be transferred. This value changes constantly during operation and is based on many vehicle dynamic factors such as engine torque, current gear, cornering angle/steering wheel angle, vehicle slip, wheel slip etc.

Wheel-RPM

Live-Inspection will give you a visual representation of your Wheel-RPM. Our 3D-Model will correctly animate your wheel-speeds and will also show wheel-slip, by gradually coloring slipping wheels red.
Colla

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