Methods and systems for an engine

摘要

Various systems and methods for an engine system which includes a throttle turbine generator having a turbine which drives an auxiliary generator and disposed in a throttle bypass are described. In some examples, a throttle bypass valve is controlled to adjust airflow through the throttle bypass responsive to airflow to cylinders of the engine. In other examples, an operating parameter such as throttle position is controlled based on transient operating conditions of the engine. In still other examples, charging of a battery is coordinated between the auxiliary generator and a primary generator.

主权项

1. A method for an engine, comprising:
when a state of charge of a battery is less than a threshold, directing intake air through a throttle bypass around a throttle disposed in an intake passage of the engine and through a turbine to drive an auxiliary generator; charging the battery via the auxiliary generator; during deceleration of a vehicle in which the engine is positioned, charging the battery via the auxiliary generator and a primary generator; and increasing intake manifold vacuum when the primary generator is degraded.