The driving dynamics are concerned with the dynamics in front of vehicles. It determines their path as a function of time, speed and acceleration, the necessary energy expenditure, the driving forces, the heating of engines and the performances. Furthermore, movement resistance plays a big role. For example, the air resistance caused by the body shape of cars has a major impact on driving dynamics.
How is the driving dynamics determined?
A driving test offers a lot of data on driving dynamics. It must be carried out with various defined driving maneuvers in order to arrive at uniform data. As standards for passenger cars have established:
- straight ahead (also under disturbing influences)
- brake tests
- slalom maneuvers
- Load change response (Delay due to gas removal in the curve)
- stationary circular test
- elchtest (simple and double lane change according to ISO 3888-2)
The experiment is carried out in the open or closed loop, ie in the open or closed loop. In this case, either wheel torques and steering angles or driving tasks are specified. During the experiment various sizes are measured. But the subjective feeling of the driver also plays a prominent role. It may be, for example, that a sports car due to its design in a fast cornering is still very safe on the road, but the driver can feel subjectively quite different. That would disturb the marketing of the car. Therefore, determining driving dynamics is not just about physical facts. Nevertheless, these are very significant in order to increase objective safety. Another important factor in the measurement of driving dynamics is the fuel consumption depending on the load condition, the route profile and the driving style.
Simulation of driving dynamics
The anticipated driving dynamics of a car that is still being planned can also be simulated using a digital vehicle model. The applied digital models can have different levels of complexity, ranging from flat single-track models to three-dimensional multi-body models. Different loads and suspensions, complex tire models and a complex K&C (Axle and Elastokinematics) program. This simulation significantly lowers development costs because it does not need to build different prototypes.
Driving dynamics and tuning
One aim of the tuning can be the improved driving dynamics. This can be achieved by changing the shock absorbers, other tires and attachments or conversions to the body. A changed engine power or for example that Accelerator Tuning (delay-free accelerationOf course, the driving dynamics also influence why such tuning measures have to be coordinated with each other. In doing so, specifications with regard to the permitted component load and the required strength of components must be observed. An improved driving dynamics through tuning measures leads to more driving pleasure, because it allows, for example, sportier driving.
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