Turbocharger control
AssigneeFord Global Technologies, LLC
InventorsAmey Y. Karnik, Mrdjan J. Jankovic
Life of this patent
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Abstract
Various systems and methods for controlling a turbocharger of an engine via a wastegate are described. In one example, the wastegate is adjusted according to a difference between the boost pressure and the atmospheric pressure. In this manner, the interdependency between controlling the boost pressure and using the boost pressure to actuate the wastegate in a boost-based wastegate configuration may be reduced.
Claims20
A method of controlling a turbocharger of an engine via a wastegate, the method comprising:
- actuating the wastegate with boost pressure generated by the turbocharger;
- and
- adjusting the wastegate according to a difference between the boost pressure and atmospheric pressure.
A method of controlling a turbocharger of an engine via a wastegate, the wastegate comprising a first port coupled to boost pressure, a second port coupled to atmospheric pressure, and a valve configured to control a flow of exhaust gasses according to a wastegate duty cycle:
- actuating the wastegate with boost pressure generated by the turbocharger and with atmospheric pressure;
- and
- adjusting the wastegate duty cycle according to a difference between the boost pressure and atmospheric pressure, and further based on a desired boost pressure.
A system for an engine comprising:
- a turbocharger;
- a wastegate comprising a first port coupled to boost pressure, a second port coupled to atmospheric pressure, and a valve configured to control a flow of exhaust gasses according to a wastegate duty cycle;
- a sensor for measuring boost pressure;
- and
- a computer readable storage medium having instructions encoded therein, including:
- instructions for actuating the wastegate with boost pressure generated by the turbocharger and with atmospheric pressure;
- and
- instructions for adjusting the wastegate duty cycle according to a difference between boost pressure and atmospheric pressure;
Dependencies are inferred from the claim text.