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US 10,208,693 B2Granted
Method and system to mitigate throttle degradation
AssigneeFord Global Technologies, LLC
InventorsBaitao Xiao, Hamid-Reza Ossareh, Adam Nathan Banker
Life of this patent
Estimating the term…
Abstract
Methods and systems for operating an engine that includes an electrically operated throttle are disclosed. In one example, mitigating actions are taken in response to degradation of the electrically operated throttle so that the engine may be operated in a way that allows a driver to reach a service area.
Claims19
A method for operating an engine via a controller in combination with a throttle, comprising:
- commanding the throttle to a position via the controller in response to an indication of throttle degradation;
- and
- open a turbocharger bypass valve, close an electric compressor bypass valve, and adjust a speed of an electric compressor in response to the indication of throttle degradation.
A method for operating an engine via a controller in combination with a throttle, comprising:
- adjusting a speed of an electric compressor via the controller for air flow through the electric compressor to follow a choked flow line of a compressor map in response to an indication of throttle degradation and a driver demand torque, wherein a compressor speed command is generated based on engine air flow while the electric compressor operates on the choked flow line of the compressor map;
- and
- choking the air flow with the electric compressor by maintaining an electric compressor bypass valve in a closed position.
An engine system, comprising:
- an engine including an air intake and a throttle;
- an exhaust gas driven turbocharger including a turbocharger bypass valve;
- an electric compressor positioned along the air intake downstream of the exhaust gas driven turbocharger and including an electric compressor bypass valve;
- and
- a controller including executable instructions stored in non-transitory memory to open the turbocharger bypass valve, close the electric compressor bypass valve, and adjust a speed of the electric compressor in response to an indication of throttle degradation.
2 more elements
Dependencies are inferred from the claim text.