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US 8,784,264 B2Granted
Method and system for controlling catalyst temperature
AssigneeFord Global Technologies, LLC
InventorsAlex O'Connor Gibson, Jeffrey Allen Doering, Dennis Graig Reed
Life of this patent
Estimating the term…
Abstract
A method and a system for improving operation of a hybrid vehicle are presented. In one example, an engine exhaust after treatment device is cooled at an opportunistic time. The approach may provide improved cooling for exhaust after treatment devices and it may also improve vehicle emissions.
Claims20
A method for operating a hybrid powertrain, comprising:
- opening a disconnect clutch and limiting a temperature that an exhaust after treatment device reaches via an action in response to a desired torque being less than a threshold torque and an after treatment device temperature.
A method for operating a hybrid powertrain, comprising:
- limiting an exhaust after treatment device temperature via a first action in response to a desired torque that is greater a threshold torque;
- and
- opening a disconnect clutch and limiting the exhaust after treatment device temperature via a second action in response to the desired torque being less than the threshold torque.
A method for operating a hybrid powertrain, comprising:
- opening a disconnect clutch and limiting a temperature that an exhaust after treatment device reaches via an action in response to a desired torque being less than a threshold torque and an after treatment device temperature;
- and
- supplying the desired torque to a vehicle driveline via a DISG.
Dependencies are inferred from the claim text.