Vehicle Motor Temperature Estimation Using Thermal Decay Model

The patent applies dynamics by making the temperature estimation method adaptive rather than static. The system dynamically selects between different estimation approaches (coolant temperature approximation vs. thermal model calculation) based on real-time operating conditions such as ignition duration, ambient temperature, and vehicle speed. This dynamic adaptation resolves the contradiction by maintaining simplicity when coolant temperature is sufficient while improving accuracy when conditions warrant a more sophisticated approach.

The patent changes parameters by introducing multiple variables into the estimation process (ignition on-time, ignition off-time, ambient temperature, vehicle speed) rather than relying solely on coolant temperature. The thermal model uses these parameter changes to calculate motor temperature more accurately under varying operating conditions, thereby improving measurement precision without excessively increasing device complexity.

The patent applies partial action by selectively applying the complex thermal model only when necessary based on operating conditions. Rather than continuously using the full thermal model, the system applies it partially - only when ignition has been off for a short period, ambient temperature is warm, or vehicle speed is low - thereby improving accuracy when needed while limiting computational complexity during normal operation.

The system performs self-service by automatically determining when the thermal model should be applied based on sensor inputs and pre-defined conditions. The control unit autonomously evaluates operating parameters and decides whether to use the simplified coolant temperature approximation or the more complex thermal model, eliminating the need for manual intervention or overly complex external control systems.