Transmission Friction Element Heat Load Mapping Across Shift Phases

The shifting process is segmented into multiple distinct phases (torque phase, inertia phase, synchronization phase), and a separate estimation model is constructed for each phase. This segmentation allows each model to be optimized for its specific phase characteristics, improving overall estimation accuracy without requiring an overly complex unified model.

The estimation system dynamically switches between different models based on the current shifting phase. By detecting which phase is active and selecting the corresponding optimized model, the system achieves high measurement precision across all phases while keeping individual models relatively simple.

Different estimation models use different parameter sets optimized for their respective phases. For example, the torque phase model emphasizes hydraulic pressure and engagement force parameters, while the inertia phase model focuses on rotation speed and friction parameters. This parameter customization for each phase improves accuracy without requiring a single overly complex model structure.

The estimation process is divided into phase-specific segments, each with its own model. This segmentation allows each model to focus on the dominant heat generation mechanisms of its phase, improving precision while keeping individual models manageable in complexity.

The system automatically detects the current shifting phase and selects the appropriate model without external intervention. This self-service mechanism manages the complexity of having multiple models by making the model selection process autonomous and integrated into the estimation system itself.

The system uses feedback from phase detection mechanisms to dynamically select and switch between models. This feedback loop ensures that the most appropriate model is always active, improving measurement precision while the automated feedback mechanism manages the complexity of the multi-model system.