Twin turbocharger wastegate control
AssigneeFord Global Technologies, LLC
InventorsJames Alfred Hilditch, Julia Helen Buckland, Robert Andrew Wade
Life of this patent
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Abstract
An engine system comprises a first turbocharger including a first wastegate, first wastegate actuator, and first turbocharger sensor, a second turbocharger including a second wastegate, second wastegate actuator, and second turbocharger sensor, and a controller configured to adjust the first wastegate actuator so that a parameter of the first turbocharger matches a parameter of the second turbocharger, based on output from the first and second turbocharger sensors. In this way, turbocharger output between the two turbochargers may be balanced.
Claims20
An engine system comprising:
- a first turbocharger including a first wastegate, first wastegate actuator, and first turbocharger sensor;
- a second turbocharger including a second wastegate, second wastegate actuator, and second turbocharger sensor;
- and
- a controller configured to adjust the first wastegate actuator until a parameter of the first turbocharger is equal to a parameter of the second turbocharger, based on output from the first and second turbocharger sensors.
A method for an engine, comprising:
- during select conditions, balancing a first turbocharger and a second turbocharger by adjusting a first wastegate actuator of the first turbocharger, the first wastegate actuator adjusted based on motor current of the first wastegate actuator and motor current of a second wastegate actuator of the second turbocharger.
A method for an engine, comprising:
- adjusting a position of a first wastegate of a first turbocharger and a position of a second wastegate of a second turbocharger based on desired boost pressure;
- and
- if turbine power of the first turbocharger is different than turbine power of the second turbocharger, then balancing the first and second turbochargers by further adjusting the position of the first wastegate and the second wastegate.
Dependencies are inferred from the claim text.