Lateral Acceleration Plausibility Checking for Automated Transmissions

The patent divides the plausibility checking process into multiple independent calculation paths using different reference models (single-track model, bicycle model, and measurement-based reference model). Each model provides a separate lateral acceleration reference value, allowing the system to segment the validation process into multiple checks rather than relying on a single model.

The patent changes the parameters used for plausibility checking by introducing multiple reference models with different calculation approaches. Instead of using only one model's parameters, the system compares measurements against multiple sets of reference parameters (ay1 from single-track model, ay2 from bicycle model, ay3 from measurement-based model) to determine plausibility across different operating conditions.

The patent implements a universal plausibility checking system that uses multiple reference models serving different functions. The single-track model handles linear range validation, the bicycle model addresses limit range conditions, and the measurement-based model provides additional verification. This multi-functional approach allows one system to handle diverse driving situations that would otherwise require separate checking mechanisms.

The patent applies partial action by selectively using different reference models based on driving conditions. The system calculates multiple reference values but uses them differently depending on the situation - for example, relying more on the single-track model during linear operation and incorporating the bicycle model during limit conditions. This avoids the full complexity of all models being equally active at all times.

The patent implements a feedback mechanism where the measured lateral acceleration is continuously compared against multiple calculated reference values. The plausibility determination based on this feedback loop provides continuous validation, allowing the system to detect and correct erroneous sensor signals before they cause incorrect transmission shifting or engine operating point selection, thereby reducing harmful emissions.

The patent performs preliminary plausibility checking of the lateral acceleration sensor signal before the transmission shifting program uses it for control decisions. By validating the sensor signal against multiple reference models in advance, the system prevents erroneous values from reaching the transmission control logic, thereby avoiding incorrect engine operating points and associated emissions problems.