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US 2019/0195158 A1Published application
System and method for diagnosing a turbocharger wastegate of an engine
AssigneeFord Global Technologies, LLC
InventorAed M. Dudar
Life of this patent
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Abstract
Systems and methods for diagnosing the presence or absence of turbocharger wastegate degradation are presented. In one example, an intake manifold pressure sensor provides a basis for determining whether or not turbocharger wastegate degradation present. The turbocharged engine may be rotated in a reverse direction to assess wastegate degradation.
Claims20
An engine operating method, comprising:
- providing an indication of wastegate degradation based on intake manifold pressure, the intake manifold pressure sensed while rotating an engine in a reverse direction and not combusting air and fuel in the engine in response to the wastegate diagnostic request;
- and
- adjusting an actuator in response to the indication.
An engine operating method, comprising:
- rotating an engine in a reverse direction with an open intake throttle while not combusting air and fuel in the engine in response to a wastegate diagnostic request;
- providing an indication of wastegate degradation based on intake manifold pressure after closing the intake throttle a first time since the wastegate diagnostic request;
- and
- adjusting an actuator in response to the indication.
1 more element
An engine system, comprising:
- an engine;
- an electric machine;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to rotate the engine clockwise and counter clockwise, the engine rotated clockwise when the engine combusts air and fuel, the engine rotating counter clockwise when the engine is not combusting air and fuel and while a request for a wastegate diagnostic is asserted.
1 more element
Dependencies are inferred from the claim text.