Methods and systems for controlling catalyst temperature

摘要

Systems and methods for improving operation of a hybrid vehicle are presented. In one example, operation of a driveline disconnect clutch is based on temperature conditions of a catalyst. The driveline disconnect clutch may not be opened if catalyst temperature is greater than a threshold temperature so that the catalyst may be cooled.

主权项

1. A method for operating a hybrid driveline, comprising:
not opening the driveline disconnect clutch in response to a catalyst temperature exceeding a first threshold temperature during conditions where the driveline disconnect clutch opens when the catalyst temperature is less than the first threshold temperature; cutting-off fuel to an engine via a fuel injector in the hybrid driveline in response to a driver demand torque while the catalyst temperature exceeds the first threshold temperature; increasing opening of a throttle via an electronic throttle of the engine in response the catalyst temperature exceeding the first threshold temperature and cutting-off fuel to the engine; and opening the driveline disconnect clutch via the controller in response to the catalyst temperature being less than a second threshold temperature.