Method and apparatus for dry clutch temperature prediction in a DCT
AssigneeGM Global Technology Operations LLC
InventorsMarkus Olsson, Ulf Gimbergsson
Life of this patent
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Abstract
A clutch temperature prediction module for a dual clutch transmission (DCT) includes at least one clutch slip power module that determines a first clutch slip power of a first clutch and a second clutch slip power of a second clutch. A temperature calculation module receives the first clutch slip power, the second clutch slip power, an ambient air temperature, an engine oil temperature, and a transmission oil temperature, and calculates at least one clutch plate temperature and a clutch housing temperature based on the first clutch slip power, the second clutch slip power, the ambient air temperature, the engine oil temperature, and the transmission oil temperature using a linear time-invariant (LTI) model.
Claims14
A clutch temperature prediction module for a dual clutch transmission (DCT), the clutch temperature prediction module comprising:
- at least one clutch slip power module that determines a first clutch slip power of a first clutch and a second clutch slip power of a second clutch;
- and
- a temperature calculation module that receives the first clutch slip power, the second clutch slip power, an ambient air temperature, an engine oil temperature, and a transmission oil temperature, and that calculates at least one clutch plate temperature and a clutch housing temperature based on the first clutch slip power, the second clutch slip power, the ambient air temperature, the engine oil temperature, and the transmission oil temperature using a linear time-invariant (LTI) model,
- wherein the LTI model is a three state model based on a first clutch plate, a second clutch plate, and a clutch housing, and
- wherein the LTI model is based on at least one heat balance equation associated with the DCT.
A method for predicting temperature in a dual clutch transmission (DCT), the method comprising:
- using a processor, performing each of:
- determining a first clutch slip power of a first clutch and a second clutch slip power of a second clutch;
- receiving the first clutch slip power, the second clutch slip power, an ambient air temperature, an engine oil temperature, and a transmission oil temperature;
- and
- calculating at least one clutch plate temperature and a clutch housing temperature based on the first clutch slip power, the second clutch slip power, the ambient air temperature, the engine oil temperature, and the transmission oil temperature using a linear time-invariant (LTI) model,
- wherein the LTI model is a three state model based on a first clutch plate, a second clutch plate, and a clutch housing, and
- wherein the LTI model is based on at least one heat balance equation associated with the DCT.
Dependencies are inferred from the claim text.