Methods and systems for airflow control
AssigneeFord Global Technologies, LLC
InventorsJohn Erik Mikael Hellstrom, Karen Elizabeth Maceroni, Jeffrey Allen Doering, Daniel Joseph Styles
Life of this patent
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Abstract
Methods and systems are provided for airflow control in an engine system which includes a throttle turbine generator including a turbine and a turbine generator. In one example, a method may include adjusting an angle of a throttle positioned in an engine inlet passage based on a desired airflow by taking into account the effects on the throttle angle due to rotation motion of the turbine, thereby accurately controlling airflow to the engine system. The method may further include predicting an airflow to the engine system based on the position of the throttle, thereby accurately monitoring torque of the engine system.
Claims20
A method for engine airflow control, comprising:
- feed-forward adjusting an intake throttle coupled to a throttle turbine based on driver torque demand;
- and
- further adjusting the intake throttle based on each of a first function of a pressure difference across the throttle turbine, and a second, different function of the pressure difference multiplied by turbine speed.
A method comprising,
- during a first condition, adjusting an intake throttle angle of a throttle coupled to a throttle turbine based on each of a first function of a pressure difference across the throttle turbine, and a product of a second, different function of the pressure difference and turbine speed;
- and
- during a second condition, adjusting an intake airflow across the throttle turbine based on each of a first function of intake throttle angle, and product of a second, different function of the intake throttle angle and the turbine speed.
A system for an engine, comprising:
- a throttle disposed in an intake passage of the engine;
- a throttle bypass configured to route intake air from a position upstream of the throttle to a position downstream of the throttle;
- one or more pressure sensors located upstream and/or downstream of the throttle for estimating a pressure difference across the throttle;
- a turbine disposed in the throttle bypass, the turbine configured to drive an auxiliary generator in electrical communication with a battery, the battery in further electrical communication with a primary generator;
- and
- a controller with computer readable instructions stored on non-transitory memory configured for:
- in response to a request for adjusting a power output of the auxiliary generator,
- adjusting an angular position of the throttle based on each of a first function of a pressure difference across the turbine, and a second, different function of the pressure difference multiplied by turbine speed.
Dependencies are inferred from the claim text.