Thermal management of a vehicle transmission
AssigneeEaton Cummins Automated Transmission Technologies, LLC
InventorsAdam C. Maurer, Graeme A. Jackson
Life of this patent
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Abstract
A transmission is subject to thermal management to prevent damage or failure due to overheating. Sensors can be employed to capture characteristics of a transmission, such as fluid temperature or pressure. Further, a predictive model can be invoked to predict characteristics based on current and future conditions. Characteristics can be compared with a threshold for intervention. A thermal mitigation strategy can be generated and initiated when characteristics satisfy the threshold. The thermal mitigation strategy can specify various actions to dissipate heat, including altering shift control logic and triggering mechanical devices that can increase airflow, reduce air temperature, or both surrounding the transmission.
Claims13
A system, comprising:
- a processor coupled to a memory that includes instructions that, when executed by the processor, cause the processor to:
- determine a pressure state based on a transmission fluid pressure received from a pressure sensor;
- evaluate temperature of a transmission received from a temperature sensor with respect to a threshold temperature, wherein the threshold temperature depends on the pressure state;
- determine a thermal mitigation strategy when the temperature satisfies the threshold temperature based on the pressure state and temperature;
- and
- initiate execution of the thermal mitigation strategy.
A method, comprising:
- evaluating transmission fluid pressure received from a pressure sensor;
- evaluating a temperature of a transmission received from a temperature sensor;
- triggering generation of a thermal mitigation strategy based on the pressure and temperature of the transmission and in response to the temperature satisfying a temperature threshold associated with intervention, wherein the threshold temperature depends on the pressure state;
- and
- initiating execution of the thermal mitigation strategy.
Dependencies are inferred from the claim text.