METHODS AND SYSTEMS FOR IMPROVING BOOST RESPONSE

摘要

Methods and systems are provided for improving boost response in a turbocharged engine. In one example, a method may include in response to a tip-out following a tip-in, when an exhaust catalyst temperature is within a threshold range, deactivating fuel injectors to the engine and increasing air flow to an exhaust turbine based on a desired increase in a turbine speed to maintain the turbine speed at or above a threshold speed.

主权项

1. A method for a boosted engine, comprising:
in response to a deceleration event, deactivating fuel injectors to all cylinders of the engine while increasing airflow through a turbine of a turbocharger in response to a temperature of an exhaust catalyst downstream of the turbine determined to be between a upper threshold and a lower threshold.